refactor: sync code from uoj.ac

2025-04-30 14:24:37 +00:00 · 2022-11-06 10:26:21 +08:00 · 2022-11-06 10:26:21 +08:00 · 844c93da84
commit 844c93da84
parent 26809917a1
144 changed files with 17388 additions and 11478 deletions
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@ -1,16 +0,0 @@
-name: Lint & Test
-
-on:
-  - push
-  - pull_request
-
-jobs:
-  php-cs-fixer:
-    name: PHP-CS-Fixer
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: PHP-CS-Fixer
-        uses: docker://oskarstark/php-cs-fixer-ga
-        with:
-          args: --config=./web/.php-cs-fixer.php --diff --dry-run
--- a/.gitignore
+++ b/.gitignore
@ -1,3 +1,5 @@
 uoj_data/
+uoj_data_1/
+uoj_data_2/
 .php-cs-fixer.cache
 docker-compose.local.yml
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@ -0,0 +1,16 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [],
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c17",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "linux-gcc-x64"
+        }
+    ],
+    "version": 4
+}
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@ -0,0 +1,4 @@
+{
+    "intelephense.format.braces": "k&r",
+    "intelephense.completion.triggerParameterHints": false
+}
--- a/db/Dockerfile
+++ b/db/Dockerfile
@ -1,4 +1,4 @@
-FROM mysql:5.7
+FROM mysql:8.0

 ADD . /opt/uoj_db
 WORKDIR /opt/uoj_db
--- a/db/add_judger.sql
+++ b/db/add_judger.sql
@ -1,2 +1,2 @@
 USE `app_uoj233`;
-insert into judger_info (judger_name, password, ip) values ('compose_judger', '_judger_password_', 'uoj-judger');
+insert into judger_info (judger_name, password, ip, display_name, description) values ('compose_judger', '_judger_password_', 'uoj-judger', '内建 Judger', '');
--- a/db/app_uoj233.sql
+++ b/db/app_uoj233.sql
@ -30,18 +30,18 @@ USE `app_uoj233`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `best_ac_submissions` (
-  `problem_id` int(11) NOT NULL,
+  `problem_id` int NOT NULL,
  `submitter` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `submission_id` int(11) NOT NULL,
-  `used_time` int(11) NOT NULL,
-  `used_memory` int(11) NOT NULL,
-  `tot_size` int(11) NOT NULL,
-  `shortest_id` int(11) NOT NULL,
-  `shortest_used_time` int(11) NOT NULL,
-  `shortest_used_memory` int(11) NOT NULL,
-  `shortest_tot_size` int(11) NOT NULL,
+  `submission_id` int NOT NULL,
+  `used_time` int NOT NULL,
+  `used_memory` int NOT NULL,
+  `tot_size` int NOT NULL,
+  `shortest_id` int NOT NULL,
+  `shortest_used_time` int NOT NULL,
+  `shortest_used_memory` int NOT NULL,
+  `shortest_tot_size` int NOT NULL,
  PRIMARY KEY (`problem_id`,`submitter`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci TABLESPACE `innodb_system`;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -60,16 +60,20 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `blogs` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `id` int NOT NULL AUTO_INCREMENT,
  `title` text COLLATE utf8mb4_unicode_ci NOT NULL,
-  `content` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `content` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
  `post_time` datetime NOT NULL,
+  `active_time` datetime NOT NULL,
  `poster` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `content_md` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
-  `zan` int(11) NOT NULL,
+  `content_md` longtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `zan` int NOT NULL DEFAULT '0',
  `is_hidden` tinyint(1) NOT NULL,
  `type` char(1) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT 'B',
-  PRIMARY KEY (`id`)
+  PRIMARY KEY (`id`),
+  KEY `post_time` (`post_time`),
+  KEY `active_time` (`active_time`),
+  KEY `poster` (`poster`,`is_hidden`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -89,14 +93,19 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `blogs_comments` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
-  `blog_id` int(11) NOT NULL,
+  `id` int NOT NULL AUTO_INCREMENT,
+  `blog_id` int NOT NULL,
  `content` text COLLATE utf8mb4_unicode_ci NOT NULL,
  `post_time` datetime NOT NULL,
  `poster` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `zan` int(11) NOT NULL,
-  `reply_id` int(11) NOT NULL,
-  PRIMARY KEY (`id`)
+  `zan` int NOT NULL,
+  `reply_id` int NOT NULL,
+  `is_hidden` tinyint(1) NOT NULL DEFAULT '0',
+  `reason_to_hide` varchar(10000) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `reply_id` (`reply_id`,`id`),
+  KEY `blog_id` (`blog_id`,`post_time`),
+  KEY `blog_id_2` (`blog_id`,`reply_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -116,8 +125,8 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `blogs_tags` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
-  `blog_id` int(11) NOT NULL,
+  `id` int NOT NULL AUTO_INCREMENT,
+  `blog_id` int NOT NULL,
  `tag` varchar(30) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `blog_id` (`blog_id`),
@ -143,8 +152,8 @@ UNLOCK TABLES;
 CREATE TABLE `click_zans` (
  `type` char(2) COLLATE utf8mb4_unicode_ci NOT NULL,
  `username` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `target_id` int(11) NOT NULL,
-  `val` tinyint(4) NOT NULL DEFAULT '1',
+  `target_id` int NOT NULL,
+  `val` tinyint NOT NULL DEFAULT '1',
  PRIMARY KEY (`type`,`target_id`,`username`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
@ -165,15 +174,17 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `contests` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
-  `name` varchar(50) NOT NULL,
+  `id` int NOT NULL AUTO_INCREMENT,
+  `name` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
  `start_time` datetime NOT NULL,
-  `last_min` int(11) NOT NULL,
-  `player_num` int(11) NOT NULL,
-  `status` varchar(50) NOT NULL,
-  `extra_config` varchar(200) NOT NULL,
-  `zan` int(11) NOT NULL,
-  PRIMARY KEY (`id`)
+  `end_time` datetime GENERATED ALWAYS AS ((`start_time` + interval `last_min` minute)) VIRTUAL NOT NULL,
+  `last_min` int NOT NULL,
+  `player_num` int NOT NULL DEFAULT '0',
+  `status` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `extra_config` varchar(1000) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '{}',
+  `zan` int NOT NULL DEFAULT '0',
+  PRIMARY KEY (`id`),
+  KEY `status` (`status`,`id`) USING BTREE
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -193,15 +204,17 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `contests_asks` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
-  `contest_id` int(11) NOT NULL,
+  `id` int NOT NULL AUTO_INCREMENT,
+  `contest_id` int NOT NULL,
  `username` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `question` text NOT NULL,
  `answer` text NOT NULL,
  `post_time` datetime NOT NULL,
  `reply_time` datetime NOT NULL,
  `is_hidden` tinyint(1) DEFAULT '0',
-  PRIMARY KEY (`id`)
+  PRIMARY KEY (`id`),
+  KEY `contest_id` (`contest_id`,`is_hidden`,`username`) USING BTREE,
+  KEY `username` (`username`,`contest_id`) USING BTREE
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -221,7 +234,7 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `contests_notice` (
-  `contest_id` int(11) NOT NULL,
+  `contest_id` int NOT NULL,
  `title` varchar(30) NOT NULL,
  `content` varchar(500) NOT NULL,
  `time` datetime NOT NULL,
@ -246,7 +259,7 @@ UNLOCK TABLES;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `contests_permissions` (
  `username` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `contest_id` int(11) NOT NULL,
+  `contest_id` int NOT NULL,
  PRIMARY KEY (`username`,`contest_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;
@ -267,10 +280,11 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `contests_problems` (
-  `problem_id` int(11) NOT NULL,
-  `contest_id` int(11) NOT NULL,
-  `dfn` int(11) NOT NULL DEFAULT 0,
-  PRIMARY KEY (`problem_id`,`contest_id`)
+  `problem_id` int NOT NULL,
+  `contest_id` int NOT NULL,
+  `level` int NOT NULL DEFAULT 0,
+  PRIMARY KEY (`problem_id`,`contest_id`),
+  KEY `contest_id` (`contest_id`,`problem_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -291,9 +305,9 @@ UNLOCK TABLES;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `contests_registrants` (
  `username` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `contest_id` int(11) NOT NULL,
+  `contest_id` int NOT NULL,
  `has_participated` tinyint(1) NOT NULL,
-  `rank` int(11) NOT NULL,
+  `final_rank` int NOT NULL,
  PRIMARY KEY (`contest_id`,`username`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;
@ -314,12 +328,14 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `contests_submissions` (
-  `contest_id` int(11) NOT NULL,
+  `contest_id` int NOT NULL,
  `submitter` varchar(20) NOT NULL,
-  `problem_id` int(11) NOT NULL,
-  `submission_id` int(11) NOT NULL,
-  `score` int(11) NOT NULL,
-  `penalty` int(11) NOT NULL,
+  `problem_id` int NOT NULL,
+  `submission_id` int NOT NULL,
+  `score` int NOT NULL,
+  `penalty` int NOT NULL,
+  `cnt` int DEFAULT NULL,
+  `n_failures` int DEFAULT NULL,
  PRIMARY KEY (`contest_id`,`submitter`,`problem_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;
@ -340,11 +356,13 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `contests_reviews` (
-  `contest_id` int(11) NOT NULL,
-  `problem_id` int(11) NOT NULL DEFAULT 0,
+  `contest_id` int NOT NULL,
+  `problem_id` int NOT NULL DEFAULT 0,
  `poster` varchar(20) NOT NULL,
  `content` text NOT NULL,
-  PRIMARY KEY (`contest_id`,`problem_id`,`poster`)
+  PRIMARY KEY (`contest_id`,`problem_id`,`poster`),
+  KEY `contest_id` (`contest_id`,`problem_id`),
+  KEY `poster` (`poster`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -364,7 +382,7 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `countdowns` (
-  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
  `title` text NOT NULL,
  `end_time` datetime NOT NULL,
  PRIMARY KEY (`id`)
@ -387,8 +405,8 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `custom_test_submissions` (
-  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
-  `problem_id` int(10) unsigned NOT NULL,
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
+  `problem_id` int UNSIGNED NOT NULL,
  `submit_time` datetime NOT NULL,
  `submitter` varchar(20) NOT NULL,
  `content` text NOT NULL,
@ -396,8 +414,10 @@ CREATE TABLE `custom_test_submissions` (
  `result` blob NOT NULL,
  `status` varchar(20) NOT NULL,
  `status_details` varchar(100) NOT NULL,
-  PRIMARY KEY (`id`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
+  PRIMARY KEY (`id`),
+  KEY `submitter` (`submitter`,`problem_id`,`id`),
+  KEY `judge_time` (`judge_time`,`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -416,10 +436,10 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `friend_links` (
-  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `id` int unsigned NOT NULL AUTO_INCREMENT,
  `title` varchar(40) NOT NULL,
  `url` varchar(100) NOT NULL,
-  `level` int(10) NOT NULL DEFAULT 10,
+  `level` int NOT NULL DEFAULT 10,
  PRIMARY KEY (`id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;
@ -440,7 +460,7 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `groups` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `id` int NOT NULL AUTO_INCREMENT,
  `title` text NOT NULL,
  `announcement` text NOT NULL DEFAULT '',
  `is_hidden` tinyint(1) NOT NULL DEFAULT 0,
@ -455,10 +475,11 @@ CREATE TABLE `groups` (
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `groups_assignments` (
-  `group_id` int(11) NOT NULL,
-  `list_id` int(11) NOT NULL,
+  `group_id` int NOT NULL,
+  `list_id` int NOT NULL,
  `end_time` datetime NOT NULL,
-  PRIMARY KEY (`group_id`, `list_id`)
+  PRIMARY KEY (`group_id`, `list_id`),
+  KEY `list_id` (`list_id`,`group_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -469,9 +490,11 @@ CREATE TABLE `groups_assignments` (
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `groups_users` (
-  `group_id` int(11) NOT NULL,
+  `group_id` int NOT NULL,
  `username` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
-  PRIMARY KEY (`group_id`, `username`)
+  PRIMARY KEY (`group_id`, `username`),
+  KEY `group_id` (`group_id`, `username`),
+  KEY `username` (`username`, `group_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -482,23 +505,26 @@ CREATE TABLE `groups_users` (
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `hacks` (
-  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
-  `problem_id` int(10) unsigned NOT NULL,
-  `contest_id` int(10) unsigned DEFAULT NULL,
-  `submission_id` int(10) unsigned NOT NULL,
-  `hacker` varchar(20) NOT NULL,
-  `owner` varchar(20) NOT NULL,
-  `input` varchar(150) NOT NULL,
-  `input_type` char(20) NOT NULL,
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
+  `problem_id` int UNSIGNED NOT NULL,
+  `contest_id` int UNSIGNED DEFAULT NULL,
+  `submission_id` int UNSIGNED NOT NULL,
+  `hacker` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `owner` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `input` varchar(150) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `input_type` char(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `submit_time` datetime NOT NULL,
  `judge_time` datetime DEFAULT NULL,
  `success` tinyint(1) DEFAULT NULL,
+  `status` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `details` blob NOT NULL,
  `is_hidden` tinyint(1) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `submission_id` (`submission_id`),
-  KEY `is_hidden` (`is_hidden`,`problem_id`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
+  KEY `is_hidden` (`is_hidden`,`problem_id`),
+  KEY `status` (`status`),
+  KEY `judge_time` (`judge_time`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -539,11 +565,14 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `judger_info` (
-  `judger_name` varchar(50) NOT NULL,
-  `password` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
-  `ip` char(20) NOT NULL,
+  `judger_name` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `password` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `ip` char(20) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `enabled` tinyint(1) NOT NULL DEFAULT '1',
+  `display_name` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `description` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
  PRIMARY KEY (`judger_name`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
+) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -555,6 +584,26 @@ LOCK TABLES `judger_info` WRITE;
 /*!40000 ALTER TABLE `judger_info` ENABLE KEYS */;
 UNLOCK TABLES;

+--
+-- Table structure for table `meta`
+--
+
+CREATE TABLE `meta` (
+  `name` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `value` json NOT NULL,
+  `updated_at` datetime NOT NULL ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`name`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+--
+-- Dumping data for table `meta`
+--
+
+LOCK TABLES `meta` WRITE;
+/*!40000 ALTER TABLE `meta` DISABLE KEYS */;
+/*!40000 ALTER TABLE `meta` ENABLE KEYS */;
+UNLOCK TABLES;
+
 --
 -- Table structure for table `problems`
 --
@ -562,18 +611,20 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `problems` (
-  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
-  `title` text NOT NULL,
+  `id` int unsigned NOT NULL AUTO_INCREMENT,
+  `title` text COLLATE utf8mb4_unicode_ci NOT NULL,
  `uploader` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `is_hidden` tinyint(1) NOT NULL DEFAULT '0',
-  `submission_requirement` text,
+  `submission_requirement` mediumtext COLLATE utf8mb4_unicode_ci,
  `hackable` tinyint(1) NOT NULL DEFAULT '0',
-  `extra_config` varchar(500) NOT NULL DEFAULT '{"view_content_type":"ALL","view_details_type":"ALL"}',
+  `extra_config` varchar(500) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '{"view_content_type":"ALL","view_details_type":"ALL"}',
  `zan` int(11) NOT NULL DEFAULT '0',
  `ac_num` int(11) NOT NULL DEFAULT '0',
  `submit_num` int(11) NOT NULL DEFAULT '0',
-  PRIMARY KEY (`id`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
+  `assigned_to_judger` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT 'any',
+  PRIMARY KEY (`id`),
+  KEY `assigned_to_judger` (`assigned_to_judger`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci TABLESPACE `innodb_system`;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -592,11 +643,11 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `problems_contents` (
-  `id` int(11) NOT NULL,
-  `statement` mediumtext NOT NULL,
-  `statement_md` mediumtext NOT NULL,
+  `id` int NOT NULL,
+  `statement` longtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `statement_md` longtext COLLATE utf8mb4_unicode_ci NOT NULL,
  PRIMARY KEY (`id`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
+) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -616,9 +667,10 @@ UNLOCK TABLES;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `problems_permissions` (
  `username` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `problem_id` int(11) NOT NULL,
-  PRIMARY KEY (`username`,`problem_id`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
+  `problem_id` int NOT NULL,
+  PRIMARY KEY (`username`,`problem_id`),
+  KEY `problem_id` (`problem_id`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -637,9 +689,10 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `problems_solutions` (
-  `problem_id` int(11) NOT NULL,
-  `blog_id` int(11) NOT NULL,
-  PRIMARY KEY (`problem_id`, `blog_id`)
+  `problem_id` int NOT NULL,
+  `blog_id` int NOT NULL,
+  PRIMARY KEY (`problem_id`, `blog_id`),
+  KEY `problem_id` (`problem_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -659,8 +712,8 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `problems_tags` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
-  `problem_id` int(11) NOT NULL,
+  `id` int NOT NULL AUTO_INCREMENT,
+  `problem_id` int NOT NULL,
  `tag` varchar(30) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `problem_id` (`problem_id`),
@ -684,7 +737,7 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `lists` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `id` int NOT NULL AUTO_INCREMENT,
  `title` text NOT NULL,
  `description` text NOT NULL DEFAULT '',
  `is_hidden` tinyint(1) NOT NULL DEFAULT '0',
@ -699,9 +752,10 @@ CREATE TABLE `lists` (
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `lists_problems` (
-  `list_id` int(11) NOT NULL,
-  `problem_id` int(11) NOT NULL,
-  PRIMARY KEY (`list_id`, `problem_id`)
+  `list_id` int NOT NULL,
+  `problem_id` int NOT NULL,
+  PRIMARY KEY (`list_id`, `problem_id`),
+  KEY `list_id` (`list_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -712,8 +766,8 @@ CREATE TABLE `lists_problems` (
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `lists_tags` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
-  `list_id` int(11) NOT NULL,
+  `id` int NOT NULL AUTO_INCREMENT,
+  `list_id` int NOT NULL,
  `tag` varchar(30) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `list_id` (`list_id`),
@ -728,14 +782,14 @@ CREATE TABLE `lists_tags` (
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `search_requests` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `id` int NOT NULL AUTO_INCREMENT,
  `created_at` datetime NOT NULL,
-  `remote_addr` varchar(50) NOT NULL,
-  `type` enum('search','autocomplete') NOT NULL,
-  `cache_id` int(11) NOT NULL,
-  `q` varchar(100) NOT NULL,
-  `content` text NOT NULL,
-  `result` mediumtext NOT NULL,
+  `remote_addr` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `type` enum('search','autocomplete') COLLATE utf8mb4_unicode_ci NOT NULL,
+  `cache_id` int NOT NULL,
+  `q` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `content` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `result` json NOT NULL,
  PRIMARY KEY (`id`),
  KEY `remote_addr` (`remote_addr`,`created_at`),
  KEY `created_at` (`created_at`)
@ -758,27 +812,42 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `submissions` (
-  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
-  `problem_id` int(10) unsigned NOT NULL,
-  `contest_id` int(10) unsigned DEFAULT NULL,
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
+  `problem_id` int UNSIGNED NOT NULL,
+  `contest_id` int UNSIGNED DEFAULT NULL,
  `submit_time` datetime NOT NULL,
-  `submitter` varchar(20) NOT NULL,
-  `content` text NOT NULL,
-  `language` varchar(15) NOT NULL,
-  `tot_size` int(11) NOT NULL,
+  `submitter` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `content` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `language` varchar(15) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `tot_size` int NOT NULL,
+  `judge_reason` varchar(1024) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
  `judge_time` datetime DEFAULT NULL,
-  `result` blob NOT NULL,
-  `status` varchar(20) NOT NULL,
-  `result_error` varchar(20) DEFAULT NULL,
-  `score` int(11) DEFAULT NULL,
-  `used_time` int(11) NOT NULL DEFAULT '0',
-  `used_memory` int(11) NOT NULL DEFAULT '0',
+  `judger` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `result` mediumblob NOT NULL,
+  `status` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `result_error` varchar(20) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `score` int DEFAULT NULL,
+  `hide_score_to_others` tinyint(1) NOT NULL DEFAULT '0',
+  `hidden_score` int DEFAULT NULL,
+  `used_time` int NOT NULL DEFAULT '0',
+  `used_memory` int NOT NULL DEFAULT '0',
  `is_hidden` tinyint(1) NOT NULL,
-  `status_details` varchar(100) NOT NULL,
+  `status_details` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
  PRIMARY KEY (`id`),
-  KEY `is_hidden` (`is_hidden`,`problem_id`),
-  KEY `score` (`problem_id`, `submitter`, `score`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
+  KEY `status` (`status`,`id`),
+  KEY `result_error` (`result_error`),
+  KEY `problem_id` (`problem_id`,`id`),
+  KEY `language` (`language`,`id`),
+  KEY `language2` (`is_hidden`,`language`,`id`),
+  KEY `user_score` (`problem_id`,`submitter`,`score`,`id`),
+  KEY `problem_id2` (`is_hidden`,`problem_id`,`id`),
+  KEY `id2` (`is_hidden`,`id`),
+  KEY `problem_score2` (`is_hidden`,`problem_id`,`score`,`id`),
+  KEY `contest_submission_status` (`contest_id`,`status`),
+  KEY `submitter2` (`is_hidden`,`submitter`,`id`),
+  KEY `submitter` (`submitter`,`id`) USING BTREE,
+  KEY `contest_id` (`contest_id`,`is_hidden`) USING BTREE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -790,6 +859,83 @@ LOCK TABLES `submissions` WRITE;
 /*!40000 ALTER TABLE `submissions` ENABLE KEYS */;
 UNLOCK TABLES;

+--
+-- Table structure for table `submissions_history`
+--
+
+CREATE TABLE `submissions_history` (
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
+  `submission_id` int UNSIGNED NOT NULL,
+  `judge_reason` varchar(1024) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `judge_time` datetime DEFAULT NULL,
+  `judger` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `result` mediumblob NOT NULL,
+  `status` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `status_details` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `result_error` varchar(20) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `score` int DEFAULT NULL,
+  `used_time` int NOT NULL DEFAULT '0',
+  `used_memory` int NOT NULL DEFAULT '0',
+  `major` tinyint(1) NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `submission_judge_time` (`submission_id`,`judge_time`,`id`),
+  KEY `submission` (`submission_id`,`id`),
+  KEY `status_major` (`status`,`major`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+--
+-- Dumping data for table `submissions_history`
+--
+
+LOCK TABLES `submissions_history` WRITE;
+/*!40000 ALTER TABLE `submissions_history` DISABLE KEYS */;
+/*!40000 ALTER TABLE `submissions_history` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `system_updates`
+--
+
+CREATE TABLE `system_updates` (
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
+  `time` datetime NOT NULL,
+  `type` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `target_id` int UNSIGNED NOT NULL,
+  `message` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `type_id_time` (`type`,`target_id`,`time`),
+  KEY `type_time` (`type`,`time`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+--
+-- Dumping data for table `system_updates`
+--
+
+LOCK TABLES `system_updates` WRITE;
+/*!40000 ALTER TABLE `system_updates` DISABLE KEYS */;
+/*!40000 ALTER TABLE `system_updates` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `upgrades`
+--
+
+CREATE TABLE `upgrades` (
+  `name` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `status` enum('up','down') COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `updated_at` datetime NOT NULL,
+  PRIMARY KEY (`name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+--
+-- Dumping data for table `upgrades`
+--
+
+LOCK TABLES `upgrades` WRITE;
+/*!40000 ALTER TABLE `upgrades` DISABLE KEYS */;
+/*!40000 ALTER TABLE `upgrades` ENABLE KEYS */;
+UNLOCK TABLES;
+
 --
 -- Table structure for table `user_info`
 --
@ -797,32 +943,29 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `user_info` (
-  `usergroup` char(1) NOT NULL DEFAULT 'U',
+  `usergroup` char(1) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT 'U',
  `username` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `usertype` varchar(250) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT 'student',
  `realname` varchar(30) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
  `school` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
-  `usertype` varchar(250) NOT NULL DEFAULT 'student',
-  `email` varchar(50) NOT NULL,
-  `password` char(32) NOT NULL,
-  `svn_password` char(10) NOT NULL,
-  `qq` bigint(20) NOT NULL,
-  `sex` char(1) NOT NULL DEFAULT 'U',
-  `ac_num` int(11) NOT NULL,
+  `email` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `password` char(32) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `svn_password` char(10) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `qq` bigint NOT NULL DEFAULT '0',
+  `sex` char(1) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT 'U',
+  `ac_num` int NOT NULL DEFAULT 0,
  `register_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
-  `remote_addr` varchar(50) NOT NULL,
-  `http_x_forwarded_for` varchar(50) NOT NULL,
-  `remember_token` char(60) NOT NULL,
-  `motto` varchar(200) NOT NULL,
-  `last_login` timestamp NOT NULL DEFAULT 0,
-  `last_visited` timestamp NOT NULL DEFAULT 0,
-  `images_size_limit` int(11) UNSIGNED NOT NULL DEFAULT 104857600, /* 100 MiB */
-  `codeforces_handle` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
-  `github` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
-  `website` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
-  `avatar_source` varchar(10) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT 'gravatar',
+  `last_login_time` datetime DEFAULT CURRENT_TIMESTAMP,
+  `last_visit_time` datetime DEFAULT CURRENT_TIMESTAMP,
+  `expiration_time` datetime DEFAULT NULL,
+  `remote_addr` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `http_x_forwarded_for` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `remember_token` char(60) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `motto` varchar(200) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `extra` json NOT NULL,
  PRIMARY KEY (`username`),
  KEY `ac_num` (`ac_num`,`username`)
-) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

 --
@ -841,13 +984,13 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `users_images` (
-  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
  `path` varchar(100) NOT NULL,
  `uploader` varchar(20) NOT NULL,
-  `width` int(11) NOT NULL,
-  `height` int(11) NOT NULL,
+  `width` int NOT NULL,
+  `height` int NOT NULL,
  `upload_time` datetime NOT NULL,
-  `size` int(11) NOT NULL,
+  `size` int NOT NULL,
  `hash` varchar(100) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `uploader` (`uploader`),
@ -874,13 +1017,16 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `user_msg` (
-  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
  `sender` varchar(20) NOT NULL,
  `receiver` varchar(20) NOT NULL,
  `message` varchar(5000) NOT NULL,
  `send_time` datetime NOT NULL,
  `read_time` datetime DEFAULT NULL,
-  PRIMARY KEY (`id`)
+  PRIMARY KEY (`id`),
+  KEY `sender` (`sender`),
+  KEY `receiver` (`receiver`),
+  KEY `read_time` (`receiver`,`read_time`) USING BTREE
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 /*!40101 SET character_set_client = @saved_cs_client */;

@ -900,13 +1046,14 @@ UNLOCK TABLES;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8mb4 */;
 CREATE TABLE `user_system_msg` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `id` int NOT NULL AUTO_INCREMENT,
  `title` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
  `content` text COLLATE utf8mb4_unicode_ci NOT NULL,
  `receiver` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `send_time` datetime NOT NULL,
  `read_time` datetime DEFAULT NULL,
-  PRIMARY KEY (`id`)
+  PRIMARY KEY (`id`),
+  KEY `receiver` (`receiver`,`read_time`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

--- a/docker-compose.development.yml
+++ b/docker-compose.development.yml
@ -24,6 +24,8 @@ services:
    build:
      context: ./judger/
      dockerfile: Dockerfile
+      args:
+        - USE_MIRROR=1
    container_name: uoj-judger
    restart: always
    stdin_open: true
@ -44,6 +46,8 @@ services:
    build:
      context: ./
      dockerfile: web/Dockerfile
+      args:
+        - USE_MIRROR=1
    container_name: uoj-web
    restart: always
    stdin_open: true
--- a/judger/Dockerfile
+++ b/judger/Dockerfile
@ -1,15 +1,24 @@
 FROM ubuntu:22.04

 ARG CLONE_ADDFLAG
+ARG USE_MIRROR
+ENV USE_MIRROR $USE_MIRROR
+SHELL ["/bin/bash", "-c"]

 ENV DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get install -y vim ntp zip unzip curl wget build-essential fp-compiler python2.7 python3.10 python3-requests libseccomp-dev openjdk-8-jdk openjdk-11-jdk openjdk-17-jdk
+ENV PKGS="vim ntp zip unzip curl wget build-essential fp-compiler python2.7 python3.10 python3-requests libseccomp-dev openjdk-8-jdk openjdk-11-jdk openjdk-17-jdk"
+RUN if [[ "$USE_MIRROR" == "1" ]]; then\
+    sed -i "s@http://.*archive.ubuntu.com@http://mirrors.tuna.tsinghua.edu.cn@g" /etc/apt/sources.list &&\
+    sed -i "s@http://.*security.ubuntu.com@http://mirrors.tuna.tsinghua.edu.cn@g" /etc/apt/sources.list ;\
+fi &&\
+apt-get update &&\
+(apt-get install -y --allow-unauthenticated --no-install-recommends -o Dpkg::Options::="--force-overwrite" -o APT::Acquire::Retries="30" --fix-missing $PKGS || apt --fix-broken install -y || apt-get install -y --allow-unauthenticated --no-install-recommends -o Dpkg::Options::="--force-overwrite" -o APT::Acquire::Retries="30" --fix-missing $PKGS)

 ADD . /opt/uoj_judger
 WORKDIR /opt/uoj_judger

 # Install environment and set startup script
-RUN sh install.sh -p && echo "\
+RUN sh install.sh -p && echo -e "\
 #!/bin/sh\n\
 if [ ! -f \"/opt/uoj_judger/.conf.json\" ]; then\n\
  cd /opt/uoj_judger && sh install.sh -i\n\
--- a/judger/uoj_judger/run/compile.cpp
+++ b/judger/uoj_judger/run/compile.cpp
@ -35,12 +35,15 @@ const std::vector<std::pair<const char *, const char *>> suffix_search_list = {
    {".code"  , ""         },
    {"20.cpp" , "C++20"    },
    {"17.cpp" , "C++17"    },
-    {"14.cpp" , "C++14"    },
+    {"14.cpp" , "C++"      },
    {"11.cpp" , "C++11"    },
-    {".cpp"   , "C++"    },
+    {"03.cpp" , "C++03"    },
+    {"98.cpp" , "C++98"    },
+    {".cpp"   , "C++"      },
    {".c"     , "C"        },
    {".pas"   , "Pascal"   },
    {"2.7.py" , "Python2.7"},
+    {"2.py"   , "Python2.7"},
    {".py"    , "Python3"  },
    {"7.java" , "Java7"    },
    {"8.java" , "Java8"    },
--- a/web/Dockerfile
+++ b/web/Dockerfile
@ -1,18 +1,30 @@
 FROM ubuntu:22.04

 ARG CLONE_ADDFLAG
+ARG USE_MIRROR
+ENV USE_MIRROR $USE_MIRROR
+SHELL ["/bin/bash", "-c"]

 ENV DEBIAN_FRONTEND=noninteractive
-RUN dpkg -s gnupg 2>/dev/null || (apt-get update && apt-get install -y gnupg) &&\
-echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu jammy main" | tee /etc/apt/sources.list.d/ondrej-php.list && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4F4EA0AAE5267A6C &&\
-apt-get update --allow-unauthenticated &&\
-apt-get install -y --allow-unauthenticated -o Dpkg::Options::="--force-overwrite" php7.4 php7.4-yaml php7.4-xml php7.4-dev php7.4-zip php7.4-mysql php7.4-mbstring php7.4-gd php7.4-imagick libseccomp-dev git vim ntp zip unzip curl wget libapache2-mod-xsendfile mysql-server php-pear cmake fp-compiler re2c libyaml-dev python2.7 python3.10 python3-requests openjdk-8-jdk openjdk-11-jdk openjdk-17-jdk
+ENV PKGS="php7.4 php7.4-yaml php7.4-xml php7.4-dev php7.4-zip php7.4-mysql php7.4-mbstring php7.4-gd php7.4-imagick libseccomp-dev git vim ntp zip unzip curl wget apache2 libapache2-mod-xsendfile php-pear mysql-client build-essential fp-compiler re2c libseccomp-dev libyaml-dev python2.7 python3.10 python3-requests openjdk-8-jdk openjdk-11-jdk openjdk-17-jdk"
+RUN if [[ "$USE_MIRROR" == "1" ]]; then\
+        sed -i "s@http://.*archive.ubuntu.com@https://mirrors.aliyun.com@g" /etc/apt/sources.list &&\
+        sed -i "s@http://.*security.ubuntu.com@https://mirrors.aliyun.com@g" /etc/apt/sources.list ;\
+    fi &&\
+    apt-get -o "Acquire::https::Verify-Peer=false" update && apt-get -o "Acquire::https::Verify-Peer=false" install -y --no-install-recommends gnupg ca-certificates &&\
+    echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu jammy main" | tee /etc/apt/sources.list.d/ondrej-php.list && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4F4EA0AAE5267A6C &&\
+    if [[ "$USE_MIRROR" == "1" ]]; then\
+        find /etc/apt/sources.list.d/ -type f -name "*.list" -exec sed -i.bak -r 's#deb(-src)?\s*http(s)?://ppa.launchpad.net#deb\1 https://launchpad.proxy.ustclug.org#ig' {} \; &&\
+        find /etc/apt/sources.list.d/ -type f -name "*.list" -exec sed -i.bak -r 's#deb(-src)?\s*http(s)?://ppa.launchpadcontent.net#deb\1 https://launchpad.proxy.ustclug.org#ig' {} \; ;\
+    fi &&\
+    apt-get update --allow-unauthenticated &&\
+    (apt-get install -y --allow-unauthenticated --no-install-recommends -o Dpkg::Options::="--force-overwrite" -o APT::Acquire::Retries="30" --fix-missing $PKGS || apt-get install --fix-broken -y -o APT::Acquire::Retries="30")

 ADD . /opt/uoj
 WORKDIR /opt/uoj

 # Install environment and set startup script
-RUN sh web/install.sh -p && echo "\
+RUN sh web/install.sh -p && echo -e "\
 #!/bin/sh\n\
 if [ ! -f \"/var/uoj_data/.UOJSetupDone\" ]; then\n\
  cd /opt/uoj/web && sh install.sh -i\n\
--- a/web/app/.default-config.php
+++ b/web/app/.default-config.php
@ -21,12 +21,12 @@ return [
 		'main' => [
 			'protocol' => 'http',
 			'host' => '_httpHost_',
-			'port' => 80
+			'port' => '80/443'
 		],
 		'blog' => [
 			'protocol' => 'http',
 			'host' => '_httpHost_',
-			'port' => 80
+			'port' => '80/443'
 		]
 	],
 	'security' => [
@ -54,7 +54,6 @@ return [
 	],
 	'switch' => [
 		'blog-domain-mode' => 3,
-		'force-login' => true,
 		'open-register' => false
 	]
 ];
--- a/web/app/controllers/add_contest.php
+++ b/web/app/controllers/add_contest.php
@ -1,101 +1,103 @@
 <?php
-	if (!Auth::check()) {
-		redirectToLogin();
-	}
+requireLib('bootstrap5');
+requirePHPLib('form');

-	if (!isNormalUser($myUser)) {
-		become403Page();
-	}
+Auth::check() || redirectToLogin();
+isSuperUser(Auth::user()) || UOJResponse::page403();

-	requireLib('bootstrap5');
-	requirePHPLib('form');
-	
-	if (!isSuperUser($myUser)) {
-		become403Page();
-	}
-	$time_form = new UOJForm('time');
-	$time_form->addVInput(
-		'name', 'text', '比赛标题', 'New Contest',
-		function($name, &$vdata) {
-			if ($name == '') {
-				return '标题不能为空';
-			}
-			
-			if (strlen($name) > 100) {
-				return '标题过长';
-			}
+$time_form = new UOJBs4Form('time');
+$time_form->addVInput(
+	'name',
+	'text',
+	'比赛标题',
+	'New Contest',
+	function ($name, &$vdata) {
+		if ($name == '') {
+			return '标题不能为空';
+		}

-			$name = HTML::escape($name);
+		if (strlen($name) > 100) {
+			return '标题过长';
+		}

-			if ($name === '') {
-				return '无效编码';
-			}
+		$name = HTML::escape($name);

-			$vdata['name'] = $name;
+		if ($name === '') {
+			return '无效编码';
+		}

-			return '';
-		},
-		null
-	);
-	$time_form->addVInput(
-		'start_time', 'text', '开始时间', date("Y-m-d H:i:s"),
-		function($str, &$vdata) {
-			try {
-				$vdata['start_time'] = new DateTime($str);
-			} catch (Exception $e) {
-				return '无效时间格式';
-			}
-			return '';
-		},
-		null
-	);
-	$time_form->addVInput(
-		'last_min', 'text', '时长（单位：分钟）', 180,
-		function($str, &$vdata) {
-			if (!validateUInt($str)) {
-				return '必须为一个整数';
-			}
+		$vdata['name'] = $name;

-			$vdata['last_min'] = $str;
+		return '';
+	},
+	null
+);
+$time_form->addVInput(
+	'start_time',
+	'text',
+	'开始时间',
+	date("Y-m-d H:i:s"),
+	function ($str, &$vdata) {
+		try {
+			$vdata['start_time'] = new DateTime($str);
+		} catch (Exception $e) {
+			return '无效时间格式';
+		}
+		return '';
+	},
+	null
+);
+$time_form->addVInput(
+	'last_min',
+	'text',
+	'时长（单位：分钟）',
+	180,
+	function ($str, &$vdata) {
+		if (!validateUInt($str)) {
+			return '必须为一个整数';
+		}

-			return '';
-		},
-		null
-	);
-	$time_form->handle = function(&$vdata) {
-		$start_time_str = $vdata['start_time']->format('Y-m-d H:i:s');
-		$esc_name = DB::escape($vdata['name']);
-		$esc_last_min = DB::escape($vdata['last_min']);
-		
-		DB::query("insert into contests (name, start_time, last_min, status) values ('$esc_name', '$start_time_str', $esc_last_min, 'unfinished')");
-	};
-	$time_form->succ_href = "/contests";
-	$time_form->runAtServer();
-	?>
+		$vdata['last_min'] = $str;
+
+		return '';
+	},
+	null
+);
+$time_form->handle = function (&$vdata) {
+	$start_time_str = $vdata['start_time']->format('Y-m-d H:i:s');
+
+	DB::insert([
+		"insert into contests",
+		"(name, start_time, last_min, status)", "values",
+		DB::tuple([$vdata['name'], $start_time_str, $vdata['last_min'], 'unfinished'])
+	]);
+};
+$time_form->succ_href = "/contests";
+$time_form->runAtServer();
+?>
 <?php echoUOJPageHeader('添加比赛') ?>

 <div class="row">
-<div class="col-lg-9">
+	<!-- left col -->
+	<div class="col-lg-9">
+		<div class="card card-default mb-2">
+			<div class="card-body">

-<div class="card card-default mb-2">
-<div class="card-body">
+				<h1 class="card-title">添加比赛</h1>

-<h1 class="h2 card-title">添加比赛</h1>
+				<div class="w-full" style="max-width: 400px">
+					<?php $time_form->printHTML(); ?>
+				</div>

-<div class="w-full" style="max-width: 400px">
-<?php $time_form->printHTML(); ?>
-</div>
-
-</div>
-</div>
-
-</div>
-
-<!-- right col -->
-<aside class="col-lg-3 mt-3 mt-lg-0">
-<?php uojIncludeView('sidebar', array()) ?>
-</aside>
+			</div>
+		</div>
+	</div>
+	<!-- end left col -->

+	<!-- right col -->
+	<aside class="col-lg-3 mt-3 mt-lg-0">
+		<?php uojIncludeView('sidebar') ?>
+	</aside>
 </div>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/announcements.php
+++ b/web/app/controllers/announcements.php
@ -1,73 +1,57 @@
 <?php
-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+requireLib('bootstrap5');
+requirePHPLib('form');
+?>
+<?php echoUOJPageHeader(UOJLocale::get('announcements')) ?>

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
+<div class="row">
+	<!-- left col -->
+	<div class="col-lg-9">
+		<h1>
+			<?= UOJLocale::get('announcements') ?>
+		</h1>

-	requireLib('bootstrap5');
-	requirePHPLib('form');
-	
-	function echoBlogCell($blog) {
-		$level = $blog['level'];
-		
-		switch ($level) {
-			case 0:
-				$level_str = '';
-				break;
-			case 1:
-				$level_str = '<span style="color:red">[三级置顶]</span> ';
-				break;
-			case 2:
-				$level_str = '<span style="color:red">[二级置顶]</span> ';
-				break;
-			case 3:
-				$level_str = '<span style="color:red">[一级置顶]</span> ';
-				break;
-		}
-		
-		echo '<tr>';
-		echo '<td>' . $level_str . getBlogLink($blog['id']) . '</td>';
-		echo '<td>' . getUserLink($blog['poster']) . '</td>';
-		echo '<td>' . $blog['post_time'] . '</td>';
-		echo '</tr>';
-	}
-	$header = <<<EOD
+		<?php
+		echoLongTable(
+			['blogs.id', 'poster', 'title', 'post_time', 'zan', 'level'],
+			'important_blogs, blogs',
+			[
+				'is_hidden' => 0,
+				'important_blogs.blog_id' => DB::raw('blogs.id')
+			],
+			'order by level desc, important_blogs.blog_id desc',
+			<<<EOD
 	<tr>
 		<th width="60%">标题</th>
 		<th width="20%">发表者</th>
 		<th width="20%">发表日期</th>
 	</tr>
-EOD;
-	$config = [
-		'page_len' => 40,
-		'div_classes' => ['card', 'my-3'],
-		'table_classes' => ['table', 'uoj-table', 'mb-0'],
-	];
-	?>
-<?php echoUOJPageHeader(UOJLocale::get('announcements')) ?>
+EOD,
+			function ($info) {
+				$blog = new UOJBlog($info);

-<div class="row">
-<!-- left col -->
-<div class="col-lg-9">
+				echo '<tr>';
+				echo '<td>' . $blog->getLink(['show_level' => true, 'show_new_tag' => true]) . '</td>';
+				echo '<td>' . getUserLink($blog->info['poster']) . '</td>';
+				echo '<td>' . $blog->info['post_time'] . '</td>';
+				echo '</tr>';
+			},
+			[
+				'page_len' => 40,
+				'div_classes' => ['card', 'my-3'],
+				'table_classes' => ['table', 'uoj-table', 'mb-0'],
+			]
+		);
+		?>

-<h1 class="h2">
-	<?= UOJLocale::get('announcements') ?>
-</h1>
-
-<?php echoLongTable(array('blogs.id', 'poster', 'title', 'post_time', 'zan', 'level'), 'important_blogs, blogs', 'is_hidden = 0 and important_blogs.blog_id = blogs.id', 'order by level desc, important_blogs.blog_id desc', $header, 'echoBlogCell', $config); ?>
-
-</div>
-<!-- end left col -->
-
-<!-- right col -->
-<aside class="col-lg-3 mt-3 mt-lg-0">
-<?php uojIncludeView('sidebar', array()) ?>
-</aside>
-<!-- end right col -->
+	</div>
+	<!-- end left col -->

+	<!-- right col -->
+	<aside class="col-lg-3 mt-3 mt-lg-0">
+		<?php uojIncludeView('sidebar') ?>
+	</aside>
+	<!-- end right col -->
 </div>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/blog_show.php
+++ b/web/app/controllers/blog_show.php
@ -1,15 +1,6 @@
 <?php
-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
+Auth::check() || redirectToLogin();
+UOJBlog::init(UOJRequest::get('id')) || UOJResponse::page404();

-	if (!validateUInt($_GET['id']) || !($blog = queryBlog($_GET['id']))) {
-		become404Page();
-	}
-	
-	redirectTo(HTML::blog_url($blog['poster'], '/post/'.$_GET['id'] . ($_GET['sub'] ?: '')));
-	?>
+redirectTo(HTML::blog_url(UOJBlog::info('poster'), '/post/' . UOJBlog::info('id'), ['escape' => false]));
--- a/web/app/controllers/blogs.php
+++ b/web/app/controllers/blogs.php
@ -1,83 +1,80 @@
 <?php
-	requireLib('bootstrap5');
-	requirePHPLib('form');
+requireLib('bootstrap5');
+requirePHPLib('form');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
-
-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
-	?>
+Auth::check() || redirectToLogin();
+?>
 <?php echoUOJPageHeader(UOJLocale::get('blogs')) ?>

 <div class="row">
+	<!-- left col -->
+	<div class="col-lg-9">
+		<!-- title container -->
+		<div class="d-flex flex-wrap justify-content-between align-items-center">
+			<h1>
+				<?= UOJLocale::get("blogs overview") ?>
+			</h1>

-<!-- left col -->
-<div class="col-lg-9">
+			<?php if (Auth::check()) : ?>
+				<div class="text-end">
+					<div class="btn-group">
+						<a href="<?= HTML::blog_url(Auth::id(), '/') ?>" class="btn btn-secondary btn-sm">
+							我的博客首页
+						</a>
+						<a href="<?= HTML::blog_url(Auth::id(), '/post/new/write') ?>" class="btn btn-primary btn-sm">
+							<i class="bi bi-pencil"></i>
+							写新博客
+						</a>
+					</div>
+				</div>
+			<?php endif ?>
+		</div>
+		<!-- end title container -->

-<!-- title container -->
-<div class="d-flex flex-wrap justify-content-between align-items-center">
-
-<h1 class="h2">
-	<?= UOJLocale::get("blogs overview") ?>
-</h1>
-
-<div class="text-end">
-	<div class="btn-group">
-		<a href="<?= HTML::blog_url(Auth::id(), '/') ?>" class="btn btn-secondary btn-sm">
-			我的博客首页
-		</a>
-		<a href="<?= HTML::blog_url(Auth::id(), '/post/new/write')?>" class="btn btn-primary btn-sm">
-			<i class="bi bi-pencil"></i>
-			写新博客
-		</a>
-	</div>
-</div>
-</div>
-<!-- end title container -->
-
-<?php
-echoLongTable(
-	['id', 'poster', 'title', 'post_time', 'zan', 'is_hidden'],
-	'blogs',
-	isSuperUser($myUser) ? "1" : "is_hidden = 0 or poster = '{$myUser['username']}'",
-	'order by post_time desc',
-	<<<EOD
+		<?php
+		echoLongTable(
+			['id', 'poster', 'title', 'post_time', 'zan', 'is_hidden'],
+			'blogs',
+			isSuperUser($myUser) ? "1" : "is_hidden = 0 or poster = '{$myUser['username']}'",
+			'order by post_time desc',
+			<<<EOD
 	<tr>
-		<th width="60%">标题</th>
-		<th width="20%">发表者</th>
-		<th width="20%">发表日期</th>
+		<th>标题</th>
+		<th style="width:200px">发表者</th>
+		<th style="width:200px">发表日期</th>
+		<th style="width:50px" class="text-center">评价</th>
 	</tr>
 EOD,
-	function($blog) {
-		echo '<tr>';
-		echo '<td>';
-		echo getBlogLink($blog['id']);
-		if ($blog['is_hidden']) {
-			echo ' <span class="badge text-bg-danger"><i class="bi bi-eye-slash-fill"></i> ', UOJLocale::get('hidden'), '</span> ';
-		}
-		echo '</td>';
-		echo '<td>' . getUserLink($blog['poster']) . '</td>';
-		echo '<td>' . $blog['post_time'] . '</td>';
-		echo '</tr>';
-	},
-	[
-		'page_len' => 10,
-		'div_classes' => ['card', 'my-3', 'table-responsive'],
-		'table_classes' => ['table', 'uoj-table', 'mb-0'],
-	]
-);
-	?>
+			function ($info) {
+				$blog = new UOJBlog($info);

-</div>
+				echo '<tr>';
+				echo '<td>';
+				echo $blog->getLink();
+				if ($blog->info['is_hidden']) {
+					echo ' <span class="badge text-bg-danger"><i class="bi bi-eye-slash-fill"></i> ', UOJLocale::get('hidden'), '</span> ';
+				}
+				echo '</td>';
+				echo '<td>' . getUserLink($blog->info['poster']) . '</td>';
+				echo '<td>' . $blog->info['post_time'] . '</td>';
+				echo '<td class="text-center">' . ClickZans::getCntBlock($blog->info['zan']) . '</td>';
+				echo '</tr>';
+			},
+			[
+				'page_len' => 10,
+				'div_classes' => ['card', 'my-3', 'table-responsive'],
+				'table_classes' => ['table', 'uoj-table', 'mb-0'],
+			]
+		);
+		?>

-<!-- right col -->
-<aside class="col-lg-3 mt-3 mt-lg-0">
-<?php uojIncludeView('sidebar') ?>
-</aside>
-<!-- end right col -->
+	</div>
+
+	<!-- right col -->
+	<aside class="col-lg-3 mt-3 mt-lg-0">
+		<?php uojIncludeView('sidebar') ?>
+	</aside>
+	<!-- end right col -->

 </div>

--- a/web/app/controllers/captcha.php
+++ b/web/app/controllers/captcha.php
@ -9,5 +9,3 @@ $_SESSION['phrase'] = $builder->getPhrase();

 header('Content-Type: image/jpeg');
 $builder->build()->output();
-
-?>
--- a/web/app/controllers/check_notice.php
+++ b/web/app/controllers/check_notice.php
@ -0,0 +1,3 @@
+<?php
+
+die(json_encode(UOJNotice::fetch(UOJTime::str2time(UOJRequest::post('last_time')))));
--- a/web/app/controllers/click_zan.php
+++ b/web/app/controllers/click_zan.php
@ -1,69 +1,24 @@
 <?php
-	function validateZan() {
-		if (!validateUInt($_POST['id'])) {
-			return false;
-		}
-		if (!validateInt($_POST['delta'])) {
-			return false;
-		}
-		if ($_POST['delta'] != 1 && $_POST['delta'] != -1) {
-			return false;
-		}
-		if ($_POST['type'] != 'B' && $_POST['type'] != 'BC' && $_POST['type'] != 'P' && $_POST['type'] != 'C') {
-			return false;
-		}
-		return true;
-	}
-	if (!validateZan()) {
-		die('<div class="text-danger">failed</div>');
-	}
-	if ($myUser == null) {
-		die('<div class="text-danger">please <a href="'.HTML::url('/login').'">log in</a></div>');
-	}
-	
-	$id = $_POST['id'];
-	$delta = $_POST['delta'];
-	$type = $_POST['type'];
-	$show_text = isset($_POST['show-text']) && $_POST['show-text'] != 'false';
-	
-	switch ($type) {
-		case 'B':
-			$table_name = 'blogs';
-			break;
-		case 'BC':
-			$table_name = 'blogs_comments';
-			break;
-		case 'P':
-			$table_name = 'problems';
-			break;
-		case 'C':
-			$table_name = 'contests';
-			break;
-	}
-	
-	$cur = queryZanVal($id, $type, $myUser);
-	
-	if ($cur != $delta) {
-		$row = DB::selectFirst("select zan from $table_name where id = $id");
-		if ($row == null) {
-			die('<div class="text-danger">failed</div>');
-		}
-		$cur += $delta;
-		if ($cur == 0) {
-			DB::query("delete from click_zans where username = '{$myUser['username']}' and type = '$type' and target_id = $id");
-		} elseif ($cur != $delta) {
-			DB::query("update click_zans set val = '$cur' where username = '{$myUser['username']}' and type = '$type' and target_id = $id");
-		} else {
-			DB::query("insert into click_zans (username, type, target_id, val) values ('{$myUser['username']}', '$type', $id, $cur)");
-		}
-		$cnt = $row['zan'] + $delta;
-		DB::query("update $table_name set zan = $cnt where id = $id");
-	} else {
-		$row = DB::selectFirst("select zan from $table_name where id = $id");
-		if ($row == null) {
-			die('<div class="text-danger">failed</div>');
-		}
-		$cnt = $row['zan'];
-	}
-	?>
-<?= getClickZanBlock($type, $id, $cnt, $cur, $show_text) ?>
+
+function validateZan() {
+	if (!validateUInt($_POST['id']))
+		return false;
+	if (!validateInt($_POST['delta']))
+		return false;
+	if ($_POST['delta'] != 1 && $_POST['delta'] != -1)
+		return false;
+	if (!ClickZans::getTable($_POST['type']))
+		return false;
+	return true;
+}
+if (!validateZan()) {
+	die('<div class="text-danger">failed</div>');
+}
+if (!Auth::check()) {
+	die('<div class="text-danger">please <a href="' . HTML::url('/login') . '">log in</a></div>');
+}
+if (!ClickZans::canClickZan($_POST['id'], $_POST['type'], Auth::user())) {
+	die('<div class="text-danger">no permission</div>');
+}
+
+die(ClickZans::click($_POST['id'], $_POST['type'], Auth::user(), $_POST['delta'], $_POST['show-text']));
--- a/web/app/controllers/contest_confirmation.php
+++ b/web/app/controllers/contest_confirmation.php
@ -1,77 +1,65 @@
 <?php
-	requireLib('bootstrap5');
-	requirePHPLib('form');
+requireLib('bootstrap5');
+requirePHPLib('form');

-	if (!validateUInt($_GET['id']) || !($contest = queryContest($_GET['id']))) {
-		become404Page();
-	}
+Auth::check() || redirectToLogin();
+UOJContest::init(UOJRequest::get('id')) || UOJResponse::page404();
+UOJContest::cur()->userCanParticipateNow(Auth::user()) || UOJResponse::page403();
+UOJContest::cur()->userHasMarkedParticipated(Auth::user()) && redirectTo(UOJContest::cur()->getUri());

-	genMoreContestInfo($contest);
-	
-	if (!Auth::check()) {
-		redirectToLogin();
-	} elseif (!hasRegistered($myUser, $contest)) {
-		redirectTo("/contest/{$contest['id']}/register");
-	} elseif ($contest['cur_progress'] < CONTEST_IN_PROGRESS) {
-		redirectTo('/contests');
-	} elseif (hasParticipated($myUser, $contest) || $contest['cur_progress'] > CONTEST_IN_PROGRESS) {
-		redirectTo("/contest/{$contest['id']}");
-	}
+$confirm_form = new UOJBs4Form('confirm');
+$confirm_form->submit_button_config['class_str'] = 'btn btn-primary mt-3';
+$confirm_form->submit_button_config['text'] = '我已核对信息，确认参加比赛';
+$confirm_form->handle = function () {
+	UOJContest::cur()->markUserAsParticipated(Auth::user());
+};
+$confirm_form->succ_href = '/contest/' . UOJContest::info('id');
+$confirm_form->runAtServer();
+?>

-	$confirm_form = new UOJForm('confirm');
-	$confirm_form->submit_button_config['class_str'] = 'btn btn-primary';
-	$confirm_form->submit_button_config['margin_class'] = 'mt-3';
-	$confirm_form->submit_button_config['text'] = '我已核对信息，确认参加比赛';
-	$confirm_form->handle = function() use ($myUser, $contest) {
-		DB::update("update contests_registrants set has_participated = 1 where username = '{$myUser['username']}' and contest_id = {$contest['id']}");
-	};
-	$confirm_form->succ_href = "/contest/{$contest['id']}";
-	$confirm_form->runAtServer();
-	?>
-
-<?php echoUOJPageHeader('确认参赛 - ' . HTML::stripTags($contest['name'])) ?>
+<?php echoUOJPageHeader('确认参赛 - ' . UOJContest::info('name')) ?>

 <div class="card mw-100 mx-auto" style="width:800px">
-<div class="card-body">
-	<h1 class="h2 card-title text-center mb-3">确认参赛</h1>
+	<div class="card-body">
+		<h1 class="card-title text-center mb-3">确认参赛</h1>

-	<p class="card-text text-center">您即将参加比赛 “<b><?= $contest['name'] ?></b>”，请在正式参赛前仔细核对以下比赛信息：</p>
+		<p class="card-text text-center">您即将参加比赛 “<b><?= UOJContest::info('name') ?></b>”，请在正式参赛前仔细核对以下比赛信息：</p>

-	<div class="table-responsive mx-auto" style="width:500px">
-		<table class="table">
-			<thead>
-				<tr>
-					<th style="width:40%"></th>
-					<th style="width:60%"></th>
-				</tr>
-			</thead>
-			<tbody>
-				<tr>
-					<td class="text-center">比赛名称</td>
-					<td><?= $contest['name'] ?></td>
-				</tr>
-				<tr>
-					<td class="text-center">参赛选手</td>
-					<td><?= getUserLink($myUser['username']) ?></td>
-				</tr>
-				<tr>
-					<td class="text-center">开始时间</td>
-					<td><?= $contest['start_time_str'] ?></td>
-				</tr>
-				<tr>
-					<td class="text-center">结束时间</td>
-					<td><?= $contest['end_time_str'] ?></td>
-				</tr>
-				<tr>
-					<td class="text-center">比赛赛制</td>
-					<td><?= $contest['extra_config']['contest_type'] ?: 'OI' ?></td>
-				</tr>
-			</tbody>
-		</table>
+		<div class="table-responsive mx-auto" style="width:500px">
+			<table class="table">
+				<thead>
+					<tr>
+						<th style="width:40%"></th>
+						<th style="width:60%"></th>
+					</tr>
+				</thead>
+				<tbody>
+					<tr>
+						<td class="text-center">比赛名称</td>
+						<td><?= UOJContest::info('name') ?></td>
+					</tr>
+					<tr>
+						<td class="text-center">参赛选手</td>
+						<td><?= getUserLink(Auth::id()) ?></td>
+					</tr>
+					<tr>
+						<td class="text-center">开始时间</td>
+						<td><?= UOJContest::info('start_time_str') ?></td>
+					</tr>
+					<tr>
+						<td class="text-center">结束时间</td>
+						<td><?= UOJContest::info('end_time_str') ?></td>
+					</tr>
+					<tr>
+						<td class="text-center">比赛赛制</td>
+						<td><?= UOJContest::cur()->basicRule() ?></td>
+					</tr>
+				</tbody>
+			</table>
+		</div>
+
+		<?php $confirm_form->printHTML() ?>
 	</div>
-
-	<?php $confirm_form->printHTML() ?>
-</div>
 </div>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/contest_inside.php
+++ b/web/app/controllers/contest_inside.php
--- a/web/app/controllers/contest_manage.php
+++ b/web/app/controllers/contest_manage.php
--- a/web/app/controllers/contest_members.php
+++ b/web/app/controllers/contest_members.php
@ -1,186 +1,167 @@
 <?php
-	requireLib('bootstrap5');
-	requirePHPLib('form');
+requireLib('bootstrap5');
+requirePHPLib('form');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+Auth::check() || redirectToLogin();
+UOJContest::init(UOJRequest::get('id')) || UOJResponse::page404();

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
+$contest = UOJContest::info();

-	if (!validateUInt($_GET['id']) || !($contest = queryContest($_GET['id']))) {
-		become404Page();
-	}
+$is_manager = UOJContest::cur()->userCanManage(Auth::user());
+$show_ip = isSuperUser(Auth::user());

-	genMoreContestInfo($contest);
+if ($is_manager) {
+	$add_new_contestant_form = new UOJBs4Form('add_new_contestant_form');
+	$add_new_contestant_form->addInput(
+		'new_username',
+		'text',
+		'用户名',
+		'',
+		function ($username, &$vdata) {
+			$user = UOJUser::query($username);

-	if (isSuperUser($myUser)) {
-		$add_new_contestant_form = new UOJForm('add_new_contestant_form');
-		$add_new_contestant_form->addInput('new_username', 'text', '用户名', '', 
-			function ($x) {
-				global $contest;
-
-				if (!validateUsername($x)) {
-					return '用户名不合法';
-				}
-				$user = queryUser($x);
-				if (!$user) {
-					return '用户不存在';
-				}
-
-				if (hasRegistered($user, $contest)) {
-					return '该用户已经报名';
-				}
-				return '';
-			},
-			null
-		);
-		$add_new_contestant_form->submit_button_config['align'] = 'compressed';
-		$add_new_contestant_form->submit_button_config['text'] = '注册该用户';
-		$add_new_contestant_form->handle = function() {
-			global $contest;
-
-			$username = $_POST['new_username'];
-
-			DB::query("replace into contests_registrants (username, contest_id, has_participated) values ('{$username}', {$contest['id']}, 0)");
-
-			updateContestPlayerNum($contest);
-		};
-		$add_new_contestant_form->runAtServer();
-
-		$add_group_to_contest_form = new UOJForm('add_group_to_contest');
-		$add_group_to_contest_form->addInput('group_id', 'text', '小组 ID', '', 
-			function ($x) {
-				global $contest;
-
-				if (!validateUInt($x)) {
-					return '小组 ID 不合法';
-				}
-				$group = queryGroup($x);
-				if (!$group) {
-					return '小组不存在';
-				}
-
-				return '';
-			},
-			null
-		);
-		$add_group_to_contest_form->submit_button_config['align'] = 'compressed';
-		$add_group_to_contest_form->submit_button_config['text'] = '注册该小组中的用户';
-		$add_group_to_contest_form->handle = function() {
-			global $contest;
-			$group_id = $_POST['group_id'];
-
-			$users = DB::selectAll("select b.username as username from groups_users a inner join user_info b on a.username = b.username where a.group_id = $group_id");
-
-			foreach ($users as $user) {
-				DB::query("replace into contests_registrants (username, contest_id, has_participated) values ('{$user['username']}', {$contest['id']}, 0)");
+			if (!$user) {
+				return '用户不存在';
 			}

-			updateContestPlayerNum($contest);
-		};
-		$add_group_to_contest_form->runAtServer();
+			if (UOJContest::cur()->userHasRegistered($user)) {
+				return '该用户已经报名';
+			}

-		$remove_user_from_contest_form = new UOJForm('remove_user_from_contest');
-		$remove_user_from_contest_form->addInput('remove_username', 'text', '用户名', '', 
-			function ($x) {
-				global $contest;
-				if (!validateUsername($x)) {
-					return '用户名不合法';
-				}
+			$vdata['user'] = $user;

-				$user = queryUser($x);
-				if (!$user) {
-					return '用户不存在';
-				}
+			return '';
+		},
+		null
+	);
+	$add_new_contestant_form->submit_button_config['align'] = 'compressed';
+	$add_new_contestant_form->submit_button_config['text'] = '注册该用户';
+	$add_new_contestant_form->handle = function (&$vdata) {
+		UOJContest::cur()->userRegister($vdata['user']);
+	};
+	$add_new_contestant_form->runAtServer();

-				if (!hasRegistered($user, $contest)) {
-					return '该用户未报名';
-				}
+	$add_group_to_contest_form = new UOJBs4Form('add_group_to_contest');
+	$add_group_to_contest_form->addInput(
+		'group_id',
+		'text',
+		'小组 ID',
+		'',
+		function ($group_id, &$vdata) {
+			if (!validateUInt($group_id)) {
+				return '小组 ID 不合法';
+			}
+			$group = queryGroup($group_id);
+			if (!$group) {
+				return '小组不存在';
+			}

-				return '';
-			},
-			null
-		);
-		$remove_user_from_contest_form->submit_button_config['align'] = 'compressed';
-		$remove_user_from_contest_form->submit_button_config['text'] = '移除该用户';
-		$remove_user_from_contest_form->submit_button_config['class_str'] = 'mt-2 btn btn-danger';
-		$remove_user_from_contest_form->handle = function() {
-			global $contest;
-			$username = $_POST['remove_username'];
+			$vdata['group_id'] = $group_id;

-			DB::query("delete from contests_registrants where username = '{$username}' and contest_id = {$contest['id']}");
-			updateContestPlayerNum($contest);
-		};
-		$remove_user_from_contest_form->runAtServer();
+			return '';
+		},
+		null
+	);
+	$add_group_to_contest_form->submit_button_config['align'] = 'compressed';
+	$add_group_to_contest_form->submit_button_config['text'] = '注册该小组中的用户';
+	$add_group_to_contest_form->handle = function (&$vdata) {
+		$users = queryGroupUsers($vdata['group_id']);

-		$force_set_user_participated_form = new UOJForm('force_set_user_participated');
-		$force_set_user_participated_form->addInput('force_set_username', 'text', '用户名', '', 
-			function ($x) {
-				global $contest;
+		foreach ($users as $user) {
+			UOJContest::cur()->userRegister($user);
+		}
+	};
+	$add_group_to_contest_form->runAtServer();

-				if (!validateUsername($x)) {
-					return '用户名不合法';
-				}
+	$remove_user_from_contest_form = new UOJBs4Form('remove_user_from_contest');
+	$remove_user_from_contest_form->addInput(
+		'remove_username',
+		'text',
+		'用户名',
+		'',
+		function ($username, &$vdata) {
+			$user = UOJUser::query($username);

-				$user = queryUser($x);
-				if (!$user) {
-					return '用户不存在';
-				}
+			if (!$user) {
+				return '用户不存在';
+			}

-				if (!hasRegistered($user, $contest)) {
-					return '该用户未报名';
-				}
+			if (!UOJContest::cur()->userHasRegistered($user)) {
+				return '该用户未报名';
+			}

-				return '';
-			},
-			null
-		);
-		$force_set_user_participated_form->submit_button_config['align'] = 'compressed';
-		$force_set_user_participated_form->submit_button_config['text'] = '强制参赛';
-		$force_set_user_participated_form->submit_button_config['class_str'] = 'mt-2 btn btn-warning';
-		$force_set_user_participated_form->handle = function() {
-			global $contest;
-			$username = $_POST['force_set_username'];
+			$vdata['user'] = $user;

-			DB::query("update contests_registrants set has_participated = 1 where username = '{$username}' and contest_id = {$contest['id']}");
-			updateContestPlayerNum($contest);
-		};
-		$force_set_user_participated_form->runAtServer();
-	}
+			return '';
+		},
+		null
+	);
+	$remove_user_from_contest_form->submit_button_config['align'] = 'compressed';
+	$remove_user_from_contest_form->submit_button_config['text'] = '移除该用户';
+	$remove_user_from_contest_form->submit_button_config['class_str'] = 'mt-2 btn btn-danger';
+	$remove_user_from_contest_form->handle = function (&$vdata) {
+		UOJContest::cur()->userUnregister($vdata['user']);
+	};
+	$remove_user_from_contest_form->runAtServer();

-	$has_contest_permission = hasContestPermission($myUser, $contest);
-	$show_ip = $has_contest_permission;
-	
-	if ($contest['cur_progress'] == CONTEST_NOT_STARTED) {
-		$iHasRegistered = $myUser != null && hasRegistered($myUser, $contest);
-	
-		if ($iHasRegistered) {
-			$unregister_form = new UOJForm('unregister');
-			$unregister_form->handle = function() {
-				global $myUser, $contest;
-				DB::query("delete from contests_registrants where username = '{$myUser['username']}' and contest_id = {$contest['id']}");
-				updateContestPlayerNum($contest);
+	$force_set_user_participated_form = new UOJBs4Form('force_set_user_participated');
+	$force_set_user_participated_form->addInput(
+		'force_set_username',
+		'text',
+		'用户名',
+		'',
+		function ($username, &$vdata) {
+			$user = UOJUser::query($username);
+
+			if (!$user) {
+				return '用户不存在';
+			}
+
+			if (!UOJContest::cur()->userHasRegistered($user)) {
+				return '该用户未报名';
+			}
+
+			$vdata['user'] = $user;
+
+			return '';
+		},
+		null
+	);
+	$force_set_user_participated_form->submit_button_config['align'] = 'compressed';
+	$force_set_user_participated_form->submit_button_config['text'] = '强制参赛';
+	$force_set_user_participated_form->submit_button_config['class_str'] = 'mt-2 btn btn-warning';
+	$force_set_user_participated_form->handle = function (&$vdata) {
+		UOJContest::cur()->markUserAsParticipated($vdata['user']);
+	};
+	$force_set_user_participated_form->runAtServer();
+}
+
+if ($contest['cur_progress'] == CONTEST_NOT_STARTED) {
+	$iHasRegistered = UOJContest::cur()->userHasRegistered(Auth::user());
+
+	if ($iHasRegistered) {
+		if ($iHasRegistered && UOJContest::cur()->freeRegistration()) {
+			$unregister_form = new UOJBs4Form('unregister');
+			$unregister_form->handle = function () {
+				UOJContest::cur()->userUnregister(Auth::user());
 			};
-			$unregister_form->submit_button_config['align'] = 'right';
 			$unregister_form->submit_button_config['class_str'] = 'btn btn-danger btn-xs';
 			$unregister_form->submit_button_config['text'] = '取消报名';
 			$unregister_form->succ_href = "/contests";
-		
+
 			$unregister_form->runAtServer();
 		}
 	}
-	?>
+}
+?>
 <?php echoUOJPageHeader(HTML::stripTags($contest['name']) . ' - ' . UOJLocale::get('contests::contest registrants')) ?>

-<h1 class="h2 text-center">
+<h1 class="text-center">
 	<?= $contest['name'] ?>
 </h1>

-<?php if ($contest['cur_progress'] == CONTEST_NOT_STARTED): ?>
-	<?php if ($iHasRegistered): ?>
+<?php if ($contest['cur_progress'] == CONTEST_NOT_STARTED) : ?>
+	<?php if ($iHasRegistered) : ?>
 		<div class="row">
 			<div class="col-6">
 				<a class="text-decoration-none text-success">已报名</a>
@ -189,64 +170,64 @@
 				<?php $unregister_form->printHTML(); ?>
 			</div>
 		</div>
-	<?php else: ?>
+	<?php else : ?>
 		<div>当前尚未报名，您可以 <a class="text-decoration-none text-danger" href="/contest/<?= $contest['id'] ?>/register">报名</a>。</div>
 	<?php endif ?>
-<div class="mt-2"></div>
+	<div class="mt-2"></div>
 <?php endif ?>

 <?php
-		$header_row = '<tr><th>#</th><th>'.UOJLocale::get('username').'</th>';
-	if ($show_ip) {
-		$header_row .= '<th>remote_addr</th><th>http_x_forwarded_for</th>';
-	}
-	if ($has_contest_permission) {
-		$header_row .= '<th>是否参赛</th>';
-	}
-	$header_row .= '</tr>';
+$header_row = '<tr><th>#</th><th>' . UOJLocale::get('username') . '</th>';
+if ($show_ip) {
+	$header_row .= '<th>remote_addr</th><th>http_x_forwarded_for</th>';
+}
+if ($is_manager) {
+	$header_row .= '<th>是否参赛</th>';
+}
+$header_row .= '</tr>';

-	echoLongTable(
-		['*'],
-		'contests_registrants',
-		"contest_id = {$contest['id']}",
-		'order by username desc',
-		$header_row,
-		function($contestant, $num) use ($myUser, $has_contest_permission, $show_ip, $has_participated) {
-			$user = queryUser($contestant['username']);
+echoLongTable(
+	['*'],
+	'contests_registrants',
+	['contest_id' => $contest['id']],
+	'order by username desc',
+	$header_row,
+	function ($contestant, $num) use ($is_manager, $show_ip) {
+		$user = UOJUser::query($contestant['username']);

-			echo '<tr>';
-			echo '<td>'.$num.'</td>';
-			echo '<td>'.getUserLink($contestant['username']).'</td>';
-			if ($show_ip) {
-				echo '<td>'.$user['remote_addr'].'</td>';
-				echo '<td>'.$user['http_x_forwarded_for'].'</td>';
-			}
-			if ($has_contest_permission) {
-				echo '<td>'.($contestant['has_participated'] ? 'Yes' : 'No').'</td>';
-			}
-			echo '</tr>';
-		},
-		[
-			'page_len' => 50,
-			'get_row_index' => '',
-			'div_classes' => ['table-responsive', 'card', 'mb-3'],
-			'table_classes' => ['table', 'uoj-table', 'mb-0', 'text-center'],
-		]
-	);
-	?>
+		echo '<tr>';
+		echo '<td>' . $num . '</td>';
+		echo '<td>' . getUserLink($user['username']) . '</td>';
+		if ($show_ip) {
+			echo '<td>' . $user['remote_addr'] . '</td>';
+			echo '<td>' . $user['http_x_forwarded_for'] . '</td>';
+		}
+		if ($is_manager) {
+			echo '<td>' . ($contestant['has_participated'] ? 'Yes' : 'No') . '</td>';
+		}
+		echo '</tr>';
+	},
+	[
+		'page_len' => 50,
+		'get_row_index' => '',
+		'div_classes' => ['table-responsive', 'card', 'mb-3'],
+		'table_classes' => ['table', 'uoj-table', 'mb-0', 'text-center'],
+	]
+);
+?>

 <?php
-	if (isset($add_new_contestant_form)) {
-		$add_new_contestant_form->printHTML();
-	}
-	if (isset($add_group_to_contest_form)) {
-		$add_group_to_contest_form->printHTML();
-	}
-	if (isset($remove_user_from_contest_form)) {
-		$remove_user_from_contest_form->printHTML();
-	}
-	if (isset($force_set_user_participated_form)) {
-		$force_set_user_participated_form->printHTML();
-	}
-	?>
+if (isset($add_new_contestant_form)) {
+	$add_new_contestant_form->printHTML();
+}
+if (isset($add_group_to_contest_form)) {
+	$add_group_to_contest_form->printHTML();
+}
+if (isset($remove_user_from_contest_form)) {
+	$remove_user_from_contest_form->printHTML();
+}
+if (isset($force_set_user_participated_form)) {
+	$force_set_user_participated_form->printHTML();
+}
+?>
 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/contest_registration.php
+++ b/web/app/controllers/contest_registration.php
@ -1,73 +1,57 @@
 <?php
-	requireLib('bootstrap5');
-	requirePHPLib('form');
+requireLib('bootstrap5');
+requirePHPLib('form');

-	if (!validateUInt($_GET['id']) || !($contest = queryContest($_GET['id']))) {
-		become404Page();
-	}
-	genMoreContestInfo($contest);
-	
-	if (!Auth::check()) {
-		redirectToLogin();
-	} elseif (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	} elseif (hasRegistered($myUser, $contest)) {
-		if ($contest['cur_progress'] < CONTEST_IN_PROGRESS) {
-			redirectTo('/contests');
-		} elseif ($contest['cur_progress'] == CONTEST_IN_PROGRESS) {
-			redirectTo("/contest/{$contest['id']}/confirm");
-		} else {
-			redirectTo("/contest/{$contest['id']}");
-		}
-	} elseif ($contest['cur_progress'] > CONTEST_IN_PROGRESS) {
-		redirectTo("/contest/{$contest['id']}");
-	}
-	
-	$register_form = new UOJForm('register');
-	$register_form->handle = function() use ($myUser, $contest) {
-		DB::query("replace into contests_registrants (username, contest_id, has_participated) values ('{$myUser['username']}', {$contest['id']}, 0)");
+Auth::check() || redirectToLogin();
+UOJContest::init(UOJRequest::get('id')) || UOJResponse::page404();
+UOJContest::cur()->userCanRegister(Auth::user(), ['ensure' => true]);

-		updateContestPlayerNum($contest);
-	};
-	$register_form->submit_button_config['class_str'] = 'btn btn-primary';
-	$register_form->submit_button_config['text'] = '我已阅读规则，确认报名比赛';
-	
-	if ($contest['cur_progress'] == CONTEST_IN_PROGRESS) {
-		$register_form->succ_href = "/contest/{$contest['id']}/confirm";
-	} else {
-		$register_form->succ_href = "/contests";
-	}
-	
-	$register_form->runAtServer();
-	?>
-<?php echoUOJPageHeader('报名 - ' . HTML::stripTags($contest['name'])) ?>
+$register_form = new UOJBs4Form('register');
+$register_form->handle = function () {
+	UOJContest::cur()->userRegister(Auth::user());
+};
+$register_form->submit_button_config['class_str'] = 'btn btn-primary';
+$register_form->submit_button_config['text'] = '我已阅读规则，确认报名比赛';
+
+if (UOJContest::cur()->progress() == CONTEST_IN_PROGRESS) {
+	$register_form->succ_href = '/contest/' . UOJContest::info('id') . '/confirm';
+} else {
+	$register_form->succ_href = '/contests';
+}
+
+$register_form->runAtServer();
+?>
+
+<?php echoUOJPageHeader('报名 - ' . UOJContest::info('name')) ?>

 <div class="card mw-100 mx-auto" style="width:800px">
-<div class="card-body">
-	<h1 class="h2 card-title text-center mb-3">比赛规则</h1>
+	<div class="card-body">
+		<h1 class="card-title text-center mb-3">比赛规则</h1>

-	<p class="card-text">您即将报名比赛 “<b><?= $contest['name'] ?></b>”，请在报名前仔细阅读以下比赛规则：</p>
+		<p class="card-text">您即将报名比赛 “<b><?= UOJContest::info('name') ?></b>”，请在报名前仔细阅读以下比赛规则：</p>

-	<ul>
-		<?php if ($contest['cur_progress'] == CONTEST_IN_PROGRESS): ?>
-		<li class="text-danger">本场比赛正在进行中，将于 <b><?= $contest['end_time_str'] ?></b> 结束。</li>
-		<?php else: ?>
-		<li>本场比赛将于 <b><?= $contest['start_time_str'] ?></b> 开始，并于 <b><?= $contest['end_time_str'] ?></b> 结束。</li>
-		<?php endif ?>
-		<li>比赛开始后点击 “<b>确认参赛</b>” 按钮才会被视为正式参赛，未正式参赛的选手不会显示在排行榜上。</li>
-		<?php if (!isset($contest['extra_config']['contest_type']) || $contest['extra_config']['contest_type'] == 'OI'): ?>
-		<li>本场比赛为 OI 赛制。比赛中途可以提交代码，但 <b>只显示测样例的结果</b>。</li>
-		<?php elseif ($contest['extra_config']['contest_type'] == 'IOI'): ?>
-		<li>本场比赛为 IOI 赛制。比赛时的提交会测试题目的全部数据，但无法查看数据点详情。</li>
-		<?php endif ?>
-		<li>若选手在比赛中多次提交了同一题，则最后按照 <b>最后一次不是 Compile Error 的提交</b> 计算排行。</li>
-		<li>比赛结束后会进行最终测试，最终测试后的排名为最终排名。</li>
-		<li>比赛排名按分数为第一关键字，完成题目的总时间为第二关键字。完成题目的总时间等于完成每道题所花时间之和（无视掉爆零的题目）。</li>
-		<li>请遵守比赛规则，一位选手在一场比赛内不得报名多个账号，选手之间不能交流或者抄袭代码，如果被检测到将以 0 分处理或者封禁。</li>
-	</ul>
+		<ul>
+			<?php if (UOJContest::cur()->progress() == CONTEST_IN_PROGRESS) : ?>
+				<li class="text-danger">本场比赛正在进行中，将于 <b><?= UOJContest::info('end_time_str') ?></b> 结束。</li>
+			<?php else : ?>
+				<li>本场比赛将于 <b><?= UOJContest::info('start_time_str') ?></b> 开始，并于 <b><?= UOJContest::info('end_time_str') ?></b> 结束。</li>
+			<?php endif ?>
+			<li>比赛开始后点击 “<b>确认参赛</b>” 按钮才会被视为正式参赛，未正式参赛的选手不会显示在排行榜上。</li>
+			<?php if (UOJContest::cur()->basicRule() == 'OI') : ?>
+				<li>本场比赛为 OI 赛制。比赛中途可以提交代码，但 <b>只显示测样例的结果</b>。</li>
+			<?php elseif (UOJContest::cur()->basicRule() == 'IOI') : ?>
+				<li>本场比赛为 IOI 赛制。比赛时的提交会测试题目的全部数据，但无法查看数据点详情。</li>
+			<?php elseif (UOJContest::cur()->basicRule() == 'ACM') : ?>
+				<li>本场比赛为 ACM 赛制。</li>
+			<?php endif ?>
+			<li>若选手在比赛中多次提交了同一题，则最后按照 <b>最后一次不是 Compile Error 的提交</b> 计算排行。</li>
+			<li>比赛结束后会进行最终测试，最终测试后的排名为最终排名。</li>
+			<li>比赛排名按分数为第一关键字，完成题目的总时间为第二关键字。完成题目的总时间等于完成每道题所花时间之和（无视掉爆零的题目）。</li>
+			<li>请遵守比赛规则，一位选手在一场比赛内不得报名多个账号，选手之间不能交流或者抄袭代码，如果被检测到将以 0 分处理或者封禁。</li>
+		</ul>

-	<?php $register_form->printHTML() ?>
-</div>
+		<?php $register_form->printHTML() ?>
+	</div>
 </div>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/contests.php
+++ b/web/app/controllers/contests.php
@ -1,108 +1,110 @@
 <?php
-	requireLib('bootstrap5');
-	requirePHPLib('form');
+requireLib('bootstrap5');
+requirePHPLib('form');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+Auth::check() || redirectToLogin();

-	$upcoming_contest_name = null;
-	$upcoming_contest_href = null;
-	$rest_second = 1000000;
-	function echoContest($contest) {
-		global $myUser, $upcoming_contest_name, $upcoming_contest_href, $rest_second;
+$upcoming_contest_name = null;
+$upcoming_contest_href = null;
+$rest_second = 1000000;
+function echoContest($info) {
+	global $upcoming_contest_name, $upcoming_contest_href, $rest_second;

-		$contest_name_link = <<<EOD
-<a class="text-decoration-none" href="/contest/{$contest['id']}">{$contest['name']}</a>
-EOD;
-		genMoreContestInfo($contest);
-		if ($contest['cur_progress'] == CONTEST_NOT_STARTED) {
-			$cur_rest_second = $contest['start_time']->getTimestamp() - UOJTime::$time_now->getTimestamp();
-			if ($cur_rest_second < $rest_second) {
-				$upcoming_contest_name = $contest['name'];
-				$upcoming_contest_href = "/contest/{$contest['id']}";
-				$rest_second = $cur_rest_second;
-			}
-			if ($myUser != null && hasRegistered($myUser, $contest)) {
-				$contest_name_link .= '<sup><a class="text-decoration-none" style="color:green">'.UOJLocale::get('contests::registered').'</a></sup>';
-			} else {
-				$contest_name_link .= '<sup><a class="text-decoration-none" style="color:red" href="/contest/'.$contest['id'].'/register">'.UOJLocale::get('contests::register').'</a></sup>';
-			}
-		} elseif ($contest['cur_progress'] == CONTEST_IN_PROGRESS) {
-			if (hasRegistered($myUser, $contest)) {
-				$contest_name_link .= '<sup><a class="text-decoration-none" style="color:blue" href="/contest/'.$contest['id'].'">'.UOJLocale::get('contests::in progress').'</a></sup>';
-			} else {
-				$contest_name_link .= '<sup><a class="text-decoration-none" style="color:blue" href="/contest/'.$contest['id'].'/register">'.UOJLocale::get('contests::in progress').'</a></sup>';
-			}
-		} elseif ($contest['cur_progress'] == CONTEST_PENDING_FINAL_TEST) {
-			$contest_name_link .= '<sup><a class="text-decoration-none" style="color:blue" href="/contest/'.$contest['id'].'">'.UOJLocale::get('contests::pending final test').'</a></sup>';
-		} elseif ($contest['cur_progress'] == CONTEST_TESTING) {
-			$contest_name_link .= '<sup><a class="text-decoration-none" style="color:blue" href="/contest/'.$contest['id'].'">'.UOJLocale::get('contests::final testing').'</a></sup>';
-		} elseif ($contest['cur_progress'] == CONTEST_FINISHED) {
-			$contest_name_link .= '<sup><a class="text-decoration-none" style="color:grey" href="/contest/'.$contest['id'].'/standings">'.UOJLocale::get('contests::ended').'</a></sup>';
+	$contest = new UOJContest($info);
+
+	$contest_name_link = '<a class="text-decoration-none" href="/contest/' . $contest->info['id'] . '">' . $contest->info['name'] . '</a>';
+
+	if ($contest->progress() == CONTEST_NOT_STARTED) {
+		$cur_rest_second = $contest->info['start_time']->getTimestamp() - UOJTime::$time_now->getTimestamp();
+		if ($cur_rest_second < $rest_second) {
+			$upcoming_contest_name = $contest->info['name'];
+			$upcoming_contest_href = '/contest/' . $contest->info['id'];
+			$rest_second = $cur_rest_second;
+		}
+		if ($contest->userHasRegistered(Auth::user())) {
+			$contest_name_link .= '<sup><a class="text-decoration-none" style="color:green">' . UOJLocale::get('contests::registered') . '</a></sup>';
+		} else {
+			$contest_name_link .= '<sup><a class="text-decoration-none" style="color:red" href="/contest/' . $contest->info['id'] . '/register">' . UOJLocale::get('contests::register') . '</a></sup>';
+		}
+	} elseif ($contest->progress() == CONTEST_IN_PROGRESS) {
+		if ($contest->allowExtraRegistration() && !$contest->userHasRegistered(Auth::user())) {
+			$contest_name_link .= '<sup><a class="text-decoration-none" style="color:red" href="/contest/' . $contest->info['id'] . '/register">' . UOJLocale::get('contests::register') . ' (' . UOJLocale::get('contests::in progress') . ')' . '</a></sup>';
+		} else {
+			$contest_name_link .= '<sup><a class="text-decoration-none" style="color:blue" href="/contest/' . $contest->info['id'] . '">' . UOJLocale::get('contests::in progress') . '</a></sup>';
+		}
+	} elseif ($contest->progress() == CONTEST_FINISHED) {
+		$contest_name_link .= '<sup><a class="text-decoration-none" style="color:grey" href="/contest/' . $contest->info['id'] . '/standings">' . UOJLocale::get('contests::ended') . '</a></sup>';
+	} else {
+		if ($contest->basicRule() == 'OI') {
+			if ($contest->progress() == CONTEST_PENDING_FINAL_TEST) {
+				$contest_name_link .= '<sup><a style="color:blue" href="/contest/' . $contest->info['id'] . '">' . UOJLocale::get('contests::pending final test') . '</a></sup>';
+			} elseif ($contest->progress() == CONTEST_TESTING) {
+				$contest_name_link .= '<sup><a style="color:blue" href="/contest/' . $contest->info['id'] . '">' . UOJLocale::get('contests::final testing') . '</a></sup>';
+			}
+		} elseif ($contest->basicRule()  == 'ACM' || $contest->basicRule() == 'IOI') {
+			$contest_name_link .= '<sup><a style="color:blue" href="/contest/' . $contest->info['id'] . '">' . UOJLocale::get('contests::official results to be announced') . '</a></sup>';
 		}
-		
-		$last_hour = round($contest['last_min'] / 60, 2);
-		
-		$click_zan_block = getClickZanBlock('C', $contest['id'], $contest['zan']);
-		echo '<tr>';
-		echo '<td>', $contest_name_link, '</td>';
-		echo '<td>', '<a class="text-decoration-none"  href="'.HTML::timeanddate_url($contest['start_time'], array('duration' => $contest['last_min'])).'">'.$contest['start_time_str'].'</a>', '</td>';
-		echo '<td>', UOJLocale::get('hours', $last_hour), '</td>';
-		echo '<td>', '<a class="text-decoration-none"  href="/contest/'.$contest['id'].'/registrants">', '<i class="bi bi-person-fill"></i>', ' &times;'.$contest['player_num'].'</a>', '</td>';
-		echo '<td>', '<div class="text-left">'.$click_zan_block.'</div>', '</td>';
-		echo '</tr>';
 	}
-	?>
+
+	$last_hour = round($contest->info['last_min'] / 60, 2);
+	echo '<tr>';
+	echo '<td>', $contest_name_link, '</td>';
+	echo '<td>', '<a class="text-decoration-none"  href="' . HTML::timeanddate_url($contest->info['start_time'], ['duration' => $contest->info['last_min']]) . '">' . $contest->info['start_time_str'] . '</a>', '</td>';
+	echo '<td>', UOJLocale::get('hours', $last_hour), '</td>';
+	echo '<td>', '<a class="text-decoration-none"  href="/contest/' . $contest->info['id'] . '/registrants">', '<i class="bi bi-person-fill"></i>', ' &times;' . $contest->info['player_num'] . '</a>', '</td>';
+	echo '<td>', '<div class="text-left">' . ClickZans::getBlock('C', $contest->info['id'], $contest->info['zan']) . '</div>', '</td>';
+	echo '</tr>';
+}
+?>
 <?php echoUOJPageHeader(UOJLocale::get('contests')) ?>

 <!-- title container -->
 <div class="d-flex justify-content-between">
-<h1 class="h2">
-	<?= UOJLocale::get('contests') ?>
-</h1>
+	<h1>
+		<?= UOJLocale::get('contests') ?>
+	</h1>

-<?php if (isSuperUser($myUser)): ?>
-<div class="text-end">
-	<a href="/contest/new" class="btn btn-primary"><?= UOJLocale::get('contests::add new contest') ?></a>
-</div>
-<?php endif ?>
+	<?php if (isSuperUser($myUser)) : ?>
+		<div class="text-end">
+			<a href="/contest/new" class="btn btn-primary"><?= UOJLocale::get('contests::add new contest') ?></a>
+		</div>
+	<?php endif ?>

 </div>
 <!-- end title container -->

-<h2 class="h4">
+<h2>
 	<?= UOJLocale::get('contests::current or upcoming contests') ?>
 </h2>
 <?php
-			$table_header = '';
-	$table_header .= '<tr>';
-	$table_header .= '<th>'.UOJLocale::get('contests::contest name').'</th>';
-	$table_header .= '<th style="width:15em;">'.UOJLocale::get('contests::start time').'</th>';
-	$table_header .= '<th style="width:100px;">'.UOJLocale::get('contests::duration').'</th>';
-	$table_header .= '<th style="width:100px;">'.UOJLocale::get('contests::the number of registrants').'</th>';
-	$table_header .= '<th style="width:180px;">'.UOJLocale::get('appraisal').'</th>';
-	$table_header .= '</tr>';
+$table_header = '';
+$table_header .= '<tr>';
+$table_header .= '<th>' . UOJLocale::get('contests::contest name') . '</th>';
+$table_header .= '<th style="width:15em;">' . UOJLocale::get('contests::start time') . '</th>';
+$table_header .= '<th style="width:100px;">' . UOJLocale::get('contests::duration') . '</th>';
+$table_header .= '<th style="width:100px;">' . UOJLocale::get('contests::the number of registrants') . '</th>';
+$table_header .= '<th style="width:180px;">' . UOJLocale::get('appraisal') . '</th>';
+$table_header .= '</tr>';

-	$table_config = [
-		'page_len' => 40,
-		'div_classes' => ['card', 'mb-3'],
-		'table_classes' => ['table', 'uoj-table', 'mb-0', 'text-center'],
-	];
+$table_config = [
+	'page_len' => 40,
+	'div_classes' => ['card', 'mb-3'],
+	'table_classes' => ['table', 'uoj-table', 'mb-0', 'text-center'],
+];

-	echoLongTable(
-		['*'],
-		'contests',
-		"status != 'finished'",
-		'order by start_time asc, id asc',
-		$table_header,
-		echoContest,
-		$table_config
-	);
+echoLongTable(
+	['*'],
+	'contests',
+	[["status", "!=", 'finished']],
+	'order by start_time asc, id asc',
+	$table_header,
+	'echoContest',
+	$table_config
+);

-	if ($rest_second <= 86400) {
-		$notification = json_encode($upcoming_contest_name . " 已经开始了。是否要跳转到比赛页面？");
-		echo <<<EOD
+if ($rest_second <= 86400) {
+	$notification = json_encode($upcoming_contest_name . " 已经开始了。是否要跳转到比赛页面？");
+	echo <<<EOD
 <div class="text-center bot-buffer-lg">
 <div class="text-secondary">$upcoming_contest_name 倒计时</div>
 <div id="contest-countdown"></div>
@ -115,21 +117,23 @@ $('#contest-countdown').countdown($rest_second, function() {
 </script>
 </div>
 EOD;
-	}
-	?>
+}
+?>

-<h2 class="h4">
+<h2>
 	<?= UOJLocale::get('contests::ended contests') ?>
 </h2>
+
 <?php
-	echoLongTable(
-		['*'],
-		'contests',
-		"status = 'finished'",
-		'order by start_time desc, id desc',
-		$table_header,
-		echoContest,
-		$table_config
-	);
-	?>
+echoLongTable(
+	['*'],
+	'contests',
+	['status' => 'finished'],
+	'order by start_time desc, id desc',
+	$table_header,
+	'echoContest',
+	$table_config
+);
+?>
+
 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/download.php
+++ b/web/app/controllers/download.php
@ -1,140 +1,61 @@
 <?php
-	requirePHPLib('judger');
+requirePHPLib('judger');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+$auth = false;
+if (UOJRequest::get('auth') === 'judger') {
+	authenticateJudger() || UOJResponse::page403();
+	$auth = true;
+} else {
+	Auth::check() || redirectToLogin();
+}

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login'] && $_GET['type'] != 'attachment') {
-		become403Page();
-	}
+switch (UOJRequest::get('type')) {
+	case 'attachment':
+		UOJProblem::init(UOJRequest::get('id')) || UOJResponse::page404();
+		if (!$auth) {
+			UOJProblem::cur()->userCanDownloadAttachments(Auth::user()) || UOJResponse::page404();
+		}

-	switch ($_GET['type']) {
-		case 'attachment':
-			if (!validateUInt($_GET['id']) || !($problem = queryProblemBrief($_GET['id']))) {
-				become404Page();
-			}
-			
-			$visible = isProblemVisibleToUser($problem, $myUser);
-			if (!$visible && $myUser != null) {
-				$result = DB::query("select contest_id from contests_problems where problem_id = {$_GET['id']}");
-				while (list($contest_id) = DB::fetch($result, MYSQLI_NUM)) {
-					$contest = queryContest($contest_id);
-					genMoreContestInfo($contest);
-					if ($contest['cur_progress'] != CONTEST_NOT_STARTED && hasRegistered($myUser, $contest) && queryContestProblemRank($contest, $problem)) {
-						$visible = true;
-					}
-				}
-			}
-			if (!$visible) {
-				become404Page();
-			}
+		$file_name = UOJProblem::cur()->getDataFolderPath() . '/download.zip';
+		$download_name = 'problem_' . UOJProblem::info('id') . '_attachment.zip';

-			$id = $_GET['id'];
-			
-			$file_name = "/var/uoj_data/$id/download.zip";
-			$download_name = "problem_{$id}_attachment.zip";
-			break;
+		break;

-		case 'problem':
-			if (!validateUInt($_GET['id']) || !($problem = queryProblemBrief($_GET['id']))) {
-				become404Page();
-			}
+	case 'problem':
+		UOJProblem::init(UOJRequest::get('id')) || UOJResponse::page404();

-			if (!isProblemVisibleToUser($problem, $myUser)) {
-				become404Page();
-			}
+		if (!$auth) {
+			UOJProblem::cur()->userCanDownloadTestData(Auth::user()) || UOJResponse::page404();
+		}

-			$id = $_GET['id'];
-			$file_name = "/var/uoj_data/$id.zip";
-			$download_name = "problem_$id.zip";
+		$file_name = UOJProblem::cur()->getDataZipPath();
+		$download_name = 'problem_' . UOJProblem::info('id') . '.zip';

-			break;
+		break;

-		case 'testcase':
-			if (!validateUInt($_GET['id']) || !($problem = queryProblemBrief($_GET['id']))) {
-				become404Page();
-			}
+	case 'submission':
+		if (!$auth) {
+			isSuperUser(Auth::user()) || UOJResponse::page404();
+		}
+		$file_name = UOJContext::storagePath() . "/submission/{$_GET['id']}/{$_GET['rand_str_id']}";
+		$download_name = "submission.zip";
+		break;

-			if (!isProblemVisibleToUser($problem, $myUser)) {
-				become404Page();
-			}
+	case 'tmp':
+		if (!$auth) {
+			isSuperUser(Auth::user()) || UOJResponse::page404();
+		}
+		$file_name = UOJContext::storagePath() . "/tmp/{$_GET['rand_str_id']}";
+		$download_name = "tmp";
+		break;

-			$id = $_GET['id'];
-			$problem_conf = getUOJConf("/var/uoj_data/$id/problem.conf");
+	case 'testlib.h':
+		$file_name = UOJLocalRun::$judger_include_path . '/testlib.h';
+		$download_name = 'testlib.h';
+		break;

-			if ($problem_conf == -1 || $problem_conf == -2) {
-				become404Page();
-			}
+	default:
+		UOJResponse::page404();
+}

-			if (!validateUInt($_GET['testcase_id'])) {
-				become404Page();
-			}
-
-			$testcase_id = $_GET['testcase_id'];
-			$testcase_group = isset($_GET['testcase_group']) && $_GET['testcase_group'] == 'extra' ? 'extra' : 'normal';
-
-			if ($testcase_group == 'extra') {
-				$n_ex_tests = getUOJConfVal($problem_conf, 'n_ex_tests', 0);
-
-				if ($testcase_id < 1 || $testcase_id > $n_ex_tests) {
-					become404Page();
-				}
-
-				switch ($_GET['testcase_type']) {
-					case 'input':
-						$file_name = "/var/uoj_data/$id/" . getUOJProblemExtraInputFileName($problem_conf, $testcase_id);
-						$download_name = getUOJProblemExtraInputFileName($problem_conf, $testcase_id);
-						break;
-
-					case 'output':
-						$file_name = "/var/uoj_data/$id/" . getUOJProblemExtraOutputFileName($problem_conf, $testcase_id);
-						$download_name = getUOJProblemExtraOutputFileName($problem_conf, $testcase_id);
-						break;
-
-					default:
-						become404Page();
-				}
-			} else {
-				$n_tests = getUOJConfVal($problem_conf, 'n_tests', 10);
-
-				if ($testcase_id < 1 || $testcase_id > $n_tests) {
-					become404Page();
-				}
-
-				switch ($_GET['testcase_type']) {
-					case 'input':
-						$file_name = "/var/uoj_data/$id/" . getUOJProblemInputFileName($problem_conf, $testcase_id);
-						$download_name = getUOJProblemInputFileName($problem_conf, $testcase_id);
-						break;
-					case 'output':
-						$file_name = "/var/uoj_data/$id/" . getUOJProblemOutputFileName($problem_conf, $testcase_id);
-						$download_name = getUOJProblemOutputFileName($problem_conf, $testcase_id);
-						break;
-					default:
-						become404Page();
-				}
-			}
-
-			break;
-
-		case 'testlib.h':
-			$file_name = "/opt/uoj/judger/uoj_judger/include/testlib.h";
-			$download_name = "testlib.h";
-			break;
-
-		default:
-			become404Page();
-	}
-	
-	$finfo = finfo_open(FILEINFO_MIME);
-	$mimetype = finfo_file($finfo, $file_name);
-	if ($mimetype === false) {
-		become404Page();
-	}
-	finfo_close($finfo);
-	
-	header("X-Sendfile: $file_name");
-	header("Content-type: $mimetype");
-	header("Content-Disposition: attachment; filename=$download_name");
-	?>
+UOJResponse::xsendfile($file_name, ['attachment' => $download_name]);
--- a/web/app/controllers/faq.php
+++ b/web/app/controllers/faq.php
@ -1,122 +1,120 @@
 <?php
-	requireLib('bootstrap5');
-	requireLib('hljs');
-	requireLib('mathjax');
-	?>
+requireLib('bootstrap5');
+requireLib('hljs');
+requireLib('mathjax');
+?>

 <?php echoUOJPageHeader(UOJLocale::get('help'))	?>

 <div class="row">
-<!-- left col -->
-<div class="col-lg-9">
+	<!-- left col -->
+	<div class="col-lg-9">
+		<div class="card card-default">
+			<article class="card-body">
+				<h1 class="h2 card-title mb-3">常见问题及其解答 (FAQ)</h1>

-<div class="card card-default">
-<article class="card-body">
-	<h1 class="h3 card-title mb-3">常见问题及其解答 (FAQ)</h1>
+				<h5 class="mt-4"><?= UOJConfig::$data['profile']['oj-name-short'] ?> 是什么</h5>
+				<p class="card-text">
+					见 <a href="https://sjzezoj.com/blogs/1">https://sjzezoj.com/blogs/1</a>。
+				</p>

-	<h5 class="mt-4"><?= UOJConfig::$data['profile']['oj-name-short'] ?> 是什么</h5>
-	<p class="card-text">
-		见 <a href="https://sjzezoj.com/blogs/1">https://sjzezoj.com/blogs/1</a>。
-	</p>
+				<h5 class="mt-4">测评环境</h5>
+				<p class="card-text">评测机的系统版本是 Ubuntu Server 22.04 LTS。</p>
+				<div class="table-responsive">
+					<table class="table table-bordered text-center align-middle">
+						<thead>
+							<th>语言</th>
+							<th>版本</th>
+							<th>编译命令</th>
+						</thead>
+						<tbody>
+							<tr>
+								<td>C</td>
+								<td>gcc 11.2.0</td>
+								<td><code>gcc -o code code.c -lm -O2 -DONLINE_JUDGE</code></td>
+							</tr>
+							<tr>
+								<td>C++</td>
+								<td>g++ 11.2.0</td>
+								<td><code>g++ -o code code.cpp -lm -O2 -DONLINE_JUDGE</code>（语言版本默认为 C++14，如选择其他版本还会添加 <code>-std=</code> 参数）</td>
+							</tr>
+							<tr>
+								<td>Pascal</td>
+								<td>fpc 3.2.2</td>
+								<td><code>fpc code.pas -O2</code></td>
+							</tr>
+							<tr>
+								<td>Python 2</td>
+								<td>Python 2.7.18</td>
+								<td rowspan="2">预先编译为优化过的字节码 <code>.pyo</code> 文件</td>
+							</tr>
+							<tr>
+								<td>Python 3</td>
+								<td>Python 3.10.6</td>
+							</tr>
+							<tr>
+								<td>Java 8</td>
+								<td>OpenJDK 1.8.0_342</td>
+								<td rowspan="3"><code>javac code.java</code></td>
+							</tr>
+							<tr>
+								<td>Java 11</td>
+								<td>OpenJDK 11.0.16</td>
+							</tr>
+							<tr>
+								<td>Java 17</td>
+								<td>OpenJDK 17.0.4</td>
+							</tr>
+						</tbody>
+					</table>
+				</div>
+				<p class="card-text">以上信息仅供参考，实际评测环境可能会有变动。</p>

-	<h5 class="mt-4">测评环境</h5>
-	<p class="card-text">评测机的系统版本是 Ubuntu Server 22.04 LTS。</p>
-	<div class="table-responsive">
-		<table class="table table-bordered text-center align-middle">
-			<thead>
-				<th>语言</th>
-				<th>版本</th>
-				<th>编译命令</th>
-			</thead>
-			<tbody>
-				<tr>
-					<td>C</td>
-					<td>gcc 11.2.0</td>
-					<td><code>gcc -o code code.c -lm -O2 -DONLINE_JUDGE</code></td>
-				</tr>
-				<tr>
-					<td>C++</td>
-					<td>g++ 11.2.0</td>
-					<td><code>g++ -o code code.cpp -lm -O2 -DONLINE_JUDGE</code>（语言版本默认为 C++14，如选择其他版本还会添加 <code>-std=</code> 参数）</td>
-				</tr>
-				<tr>
-					<td>Pascal</td>
-					<td>fpc 3.2.2</td>
-					<td><code>fpc code.pas -O2</code></td>
-				</tr>
-				<tr>
-					<td>Python 2</td>
-					<td>Python 2.7.18</td>
-					<td rowspan="2">预先编译为优化过的字节码 <code>.pyo</code> 文件</td>
-				</tr>
-				<tr>
-					<td>Python 3</td>
-					<td>Python 3.10.6</td>
-				</tr>
-				<tr>
-					<td>Java 8</td>
-					<td>OpenJDK 1.8.0_342</td>
-					<td rowspan="3"><code>javac code.java</code></td>
-				</tr>
-				<tr>
-					<td>Java 11</td>
-					<td>OpenJDK 11.0.16</td>
-				</tr>
-				<tr>
-					<td>Java 17</td>
-					<td>OpenJDK 17.0.4</td>
-				</tr>
-			</tbody>
-		</table>
+				<h5 class="mt-4">如何上传头像</h5>
+				<p class="card-text">
+					<?= UOJConfig::$data['profile']['oj-name-short'] ?> 不提供头像存储服务。每到一个网站都要上传一个头像挺烦的对不对？我们支持 Gravatar，请使用 Gravatar 吧！Gravatar 是一个全球的头像存储服务，你的头像将会与你的电子邮箱绑定。在各大网站比如各种 Wordpress 还有各种 OJ 比如 Vijos、Contest Hunter 上，只要你电子邮箱填对了，那么你的头像也就立即能显示了！
+				</p>
+				<p class="card-text">
+					快使用 Gravatar 吧！Gravatar 地址：<a href="https://cn.gravatar.com" target="_blank">https://cn.gravatar.com</a>。进去后注册个帐号然后与邮箱绑定并上传头像，就 OK 啦！
+				</p>
+				<p class="card-text">
+					上不去 Gravatar？没关系，我们现在也支持 QQ 头像了！你只需要前往 “更改个人信息” 页面填写自己的 QQ 号，并将 “头像来源” 选为 “QQ” 就可以让你的 QQ 头像显示在 S2OJ 上啦！
+				</p>
+
+				<h5 class="mt-4">递归 10<sup>7</sup> 层怎么没爆栈啊</h5>
+				<p class="card-text">
+					没错就是这样！除非是特殊情况，<?= UOJConfig::$data['profile']['oj-name-short'] ?> 测评程序时的栈大小与该题的空间限制是相等的！
+				</p>
+
+				<h5 class="mt-4">联系方式</h5>
+				<p class="card-text">
+					题目相关问题请联系各校区的竞赛教练以及题目管理员。
+				</p>
+				<p class="card-text">
+					系统相关问题请邮件联系 <a href="https://sjzezoj.com/user/baoshuo" class="uoj-username">baoshuo</a>（<a href="mailto:i@baoshuo.ren">i@baoshuo.ren</a>）
+					和 <a href="https://sjzezoj.com/user/nekko" class="uoj-username">nekko</a>（<a href="mailto:1139855151@qq.com">1139855151@qq.com</a>）。
+				</p>
+
+				<h5 class="mt-4">开源项目</h5>
+				<p class="card-text">
+					<?= UOJConfig::$data['profile']['oj-name-short'] ?> 的源代码存放于
+					<a href="https://github.com/renbaoshuo/S2OJ" target="_blank">https://github.com/renbaoshuo/S2OJ</a>。
+					如果你网不太好，打不开 GitHub 的话，也可以点击 <a href="https://git.m.ac/baoshuo/S2OJ" target="_blank">https://git.m.ac/baoshuo/S2OJ</a> 查看哦！这两个仓库的内容是一模一样的。
+				</p>
+
+				<h5 class="mt-4">用户手册</h5>
+				<p class="card-text">
+					请移步 <a href="https://s2oj.github.io/">S2OJ 使用文档</a>。
+				</p>
+			</article>
+		</div>
+		<!-- end left col -->
 	</div>
-	<p class="card-text">以上信息仅供参考，实际评测环境可能会有变动。</p>

-	<h5 class="mt-4">如何上传头像</h5>
-	<p class="card-text">
-		<?= UOJConfig::$data['profile']['oj-name-short'] ?> 不提供头像存储服务。每到一个网站都要上传一个头像挺烦的对不对？我们支持 Gravatar，请使用 Gravatar 吧！Gravatar 是一个全球的头像存储服务，你的头像将会与你的电子邮箱绑定。在各大网站比如各种 Wordpress 还有各种 OJ 比如 Vijos、Contest Hunter 上，只要你电子邮箱填对了，那么你的头像也就立即能显示了！
-	</p>
-	<p class="card-text">
-		快使用 Gravatar 吧！Gravatar 地址：<a href="https://cn.gravatar.com" target="_blank">https://cn.gravatar.com</a>。进去后注册个帐号然后与邮箱绑定并上传头像，就 OK 啦！
-	</p>
-	<p class="card-text">
-		上不去 Gravatar？没关系，我们现在也支持 QQ 头像了！你只需要前往 “更改个人信息” 页面填写自己的 QQ 号，并将 “头像来源” 选为 “QQ” 就可以让你的 QQ 头像显示在 S2OJ 上啦！
-	</p>
-
-	<h5 class="mt-4">递归 10<sup>7</sup> 层怎么没爆栈啊</h5>
-	<p class="card-text">
-		没错就是这样！除非是特殊情况，<?= UOJConfig::$data['profile']['oj-name-short'] ?> 测评程序时的栈大小与该题的空间限制是相等的！
-	</p>
-
-	<h5 class="mt-4">联系方式</h5>
-	<p class="card-text">
-		题目相关问题请联系各校区的竞赛教练以及题目管理员。
-	</p>
-	<p class="card-text">
-		系统相关问题请邮件联系 <a href="https://sjzezoj.com/user/baoshuo" class="uoj-username">baoshuo</a>（<a href="mailto:i@baoshuo.ren">i@baoshuo.ren</a>）
-		和 <a href="https://sjzezoj.com/user/nekko" class="uoj-username">nekko</a>（<a href="mailto:1139855151@qq.com">1139855151@qq.com</a>）。
-	</p>
-
-	<h5 class="mt-4">开源项目</h5>
-	<p class="card-text">
-		<?= UOJConfig::$data['profile']['oj-name-short'] ?> 的源代码存放于
-		<a href="https://github.com/renbaoshuo/S2OJ" target="_blank">https://github.com/renbaoshuo/S2OJ</a>。
-		如果你网不太好，打不开 GitHub 的话，也可以点击 <a href="https://git.m.ac/baoshuo/S2OJ" target="_blank">https://git.m.ac/baoshuo/S2OJ</a> 查看哦！这两个仓库的内容是一模一样的。
-	</p>
-
-	<h5 class="mt-4">用户手册</h5>
-	<p class="card-text">
-		请移步 <a href="https://s2oj.github.io/">S2OJ 使用文档</a>。
-	</p>
-</article>
-</div>
-
-<!-- end left col -->
-</div>
-
-<!-- right col -->
-<aside class="col-lg-3 mt-3 mt-lg-0">
-<?php uojIncludeView('sidebar', array()) ?>
-</aside>
+	<!-- right col -->
+	<aside class="col-lg-3 mt-3 mt-lg-0">
+		<?php uojIncludeView('sidebar') ?>
+	</aside>

 </div>

--- a/web/app/controllers/forgot_pw.php
+++ b/web/app/controllers/forgot_pw.php
@ -1,7 +1,7 @@
 <?php
 	requirePHPLib('form');
 	
-	$forgot_form = new UOJForm('forgot');
+	$forgot_form = new UOJBs4Form('forgot');
 	$forgot_form->addInput('username', 'text', '用户名', '',
 		function($username, &$vdata) {
 			if (!validateUsername($username)) {
--- a/web/app/controllers/group.php
+++ b/web/app/controllers/group.php
@ -4,14 +4,10 @@
 	requirePHPLib('judger');
 	requirePHPLib('data');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
+	if (!Auth::check()) {
 		redirectToLogin();
 	}

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
-
 	$group_id = $_GET['id'];
 	if (!validateUInt($group_id) || !($group = queryGroup($group_id))) {
 		become404Page();
@ -30,7 +26,7 @@

 <!-- title -->
 <div class="d-flex justify-content-between">
-<h1 class="h2">
+<h1>
 	<?php if ($group['is_hidden']): ?>
 		<span class="fs-5 text-danger">[隐藏]</span>
 	<?php endif ?>
@ -51,7 +47,7 @@
 <!-- main content -->
 <div class="card mb-3">
 	<div class="card-body">
-		<h2 class="h4">
+		<h2 class="h3">
 			<?= UOJLocale::get('group announcement') ?>
 		</h2>
 		<?php if ($group['announcement']): ?>
@ -68,7 +64,7 @@

 <div class="card mb-3">
 	<div class="card-body">
-		<h2 class="card-title h4">
+		<h2 class="card-title h3">
 			<?= UOJLocale::get('news') ?>
 		</h5>
 		<ul class="mb-0">
@ -92,7 +88,7 @@

 <div class="card card-default mb-3">
 	<div class="card-body">
-		<h2 class="card-title h4">
+		<h2 class="card-title h3">
 			<?= UOJLocale::get('assignments') ?>
 		</h5>
 		<?php
@ -139,7 +135,7 @@ EOD,

 <div class="card card-default mb-3">
 	<div class="card-body">
-		<h2 class="card-title h4">
+		<h2 class="card-title h3">
 			<?= UOJLocale::get('top solver') ?>
 		</h5>
 		<?php echoRanklist([
--- a/web/app/controllers/group_assignment.php
+++ b/web/app/controllers/group_assignment.php
@ -1,12 +1,8 @@
 <?php
-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
+	if (!Auth::check()) {
 		redirectToLogin();
 	}

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
-
 	requirePHPLib('form');
 	requireLib('bootstrap5');

@ -40,7 +36,7 @@
 <!-- left col -->
 <div class="col-lg-9">

-<h1 class="h2">
+<h1>
 	<small class="fs-4">作业：</small><?= $list['title'] ?>
 </h1>
 <ul class="mt-3">
--- a/web/app/controllers/group_manage.php
+++ b/web/app/controllers/group_manage.php
@ -43,7 +43,7 @@
 	}

 	if ($cur_tab == 'profile') {
-		$update_profile_form = new UOJForm('update_profile');
+		$update_profile_form = new UOJBs4Form('update_profile');
 		$update_profile_form->addVInput('name', 'text', '名称', $group['title'],
 			function($title, &$vdata) {
 				if ($title == '') {
@ -107,7 +107,7 @@ function(res) {
 	$(window).scrollTop(0);
 }
 EOD);
-		$update_profile_form->submit_button_config['margin_class'] = 'mt-3';
+		$update_profile_form->submit_button_config['class_str'] = 'btn btn-secondary mt-3';
 		$update_profile_form->submit_button_config['text'] = '更新';
 		$update_profile_form->runAtServer();
 	} elseif ($cur_tab == 'assignments') {
@ -127,7 +127,7 @@ EOD);
 			dieWithAlert('移除成功！');
 		}

-		$add_new_assignment_form = new UOJForm('add_new_assignment');
+		$add_new_assignment_form = new UOJBs4Form('add_new_assignment');
 		$add_new_assignment_form->addVInput('new_assignment_list_id', 'text', '题单 ID', '', 
 			function ($list_id, &$vdata) use ($group) {
 				if (!validateUInt($list_id)) {
@ -177,7 +177,7 @@ EOD);
 				'message' => '题单 #' . $vdata['list_id'] . ' 已经被添加到作业列表中，结束时间为 ' . $vdata['end_time']->format('Y-m-d H:i:s') . '。'
 			]);
 		};
-		$add_new_assignment_form->submit_button_config['margin_class'] = 'mt-3';
+		$add_new_assignment_form->submit_button_config['class_str'] = 'btn btn-secondary mt-3';
 		$add_new_assignment_form->submit_button_config['text'] = '添加';
 		$add_new_assignment_form->setAjaxSubmit(<<<EOD
 function(res) {
@ -223,7 +223,7 @@ EOD);
 			dieWithAlert('移除成功！');
 		}

-		$add_new_user_form = new UOJForm('add_new_user');
+		$add_new_user_form = new UOJBs4Form('add_new_user');
 		$add_new_user_form->addVInput('new_username', 'text', '用户名', '', 
 			function ($username, &$vdata) {
 				global $group_id;
@ -246,7 +246,7 @@ EOD);
 			},
 			null
 		);
-		$add_new_user_form->submit_button_config['margin_class'] = 'mt-3';
+		$add_new_user_form->submit_button_config['class_str'] = 'btn btn-secondary mt-3';
 		$add_new_user_form->submit_button_config['text'] = '添加';
 		$add_new_user_form->handle = function(&$vdata) use ($group) {
 			DB::insert("insert into groups_users (group_id, username) values ({$group['id']}, '{$vdata['username']}')");
@ -277,7 +277,7 @@ EOD);
 	?>
 <?php echoUOJPageHeader('管理 - ' . $group['title']); ?>

-<h1 class="h2 d-block d-md-inline-block">
+<h1 class="d-block d-md-inline-block">
 	<?= $group['title'] ?>
 	<small class="fs-5">(ID: #<?= $group['id'] ?>)</small>
 	管理
--- a/web/app/controllers/groups.php
+++ b/web/app/controllers/groups.php
@ -1,57 +1,50 @@
 <?php
-	requireLib('bootstrap5');
-	requirePHPLib('form');
-	requirePHPLib('judger');
-	requirePHPLib('data');
+requireLib('bootstrap5');
+requirePHPLib('form');
+requirePHPLib('judger');
+requirePHPLib('data');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+if (!Auth::check()) {
+	redirectToLogin();
+}

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
-
-	if (isSuperUser($myUser)) {
-		$new_group_form = new UOJForm('new_group');
-		$new_group_form->handle = function() {
-			DB::query("insert into `groups` (title, is_hidden) values ('新小组', 1)");
-		};
-		$new_group_form->submit_button_config['align'] = 'right';
-		$new_group_form->submit_button_config['class_str'] = 'btn btn-primary';
-		$new_group_form->submit_button_config['text'] = UOJLocale::get('add new group');
-		$new_group_form->submit_button_config['smart_confirm'] = '';
-		$new_group_form->runAtServer();
-	}
-	?>
+if (isSuperUser($myUser)) {
+	$new_group_form = new UOJBs4Form('new_group');
+	$new_group_form->handle = function () {
+		DB::query("insert into `groups` (title, is_hidden) values ('新小组', 1)");
+	};
+	$new_group_form->submit_button_config['align'] = 'right';
+	$new_group_form->submit_button_config['class_str'] = 'btn btn-primary';
+	$new_group_form->submit_button_config['text'] = UOJLocale::get('add new group');
+	$new_group_form->submit_button_config['smart_confirm'] = '';
+	$new_group_form->runAtServer();
+}
+?>

 <?php echoUOJPageHeader(UOJLocale::get('groups')) ?>

 <div class="row">
+	<!-- left col -->
+	<div class="col-lg-9">
+		<!-- title container -->
+		<div class="d-flex justify-content-between">
+			<h1>
+				<?= UOJLocale::get('groups') ?>
+			</h1>

-<!-- left col -->
-<div class="col-lg-9">
+			<?php if (isset($new_group_form)) : ?>
+				<div class="text-end mb-2">
+					<?php $new_group_form->printHTML(); ?>
+				</div>
+			<?php endif ?>

-<!-- title container -->
-<div class="d-flex justify-content-between">
+		</div>
+		<!-- end title container -->

-<h1 class="h2">
-	<?= UOJLocale::get('groups') ?>
-</h1>
-
-<?php if (isset($new_group_form)): ?>
-<div class="text-end mb-2">
-	<?php $new_group_form->printHTML(); ?>
-</div>
-<?php endif ?>
-
-</div>
-<!-- end title container -->
-
-<?php
-	    $groups_caption = UOJLocale::get('groups');
-	$users_caption = UOJLocale::get('users count');
-	$header = <<<EOD
+		<?php
+		$groups_caption = UOJLocale::get('groups');
+		$users_caption = UOJLocale::get('users count');
+		$header = <<<EOD
 <tr>
    <th class="text-center" style="width:5em;">ID</th>
    <th>{$groups_caption}</th>
@ -59,52 +52,58 @@
 </tr>
 EOD;

-	if (isSuperUser($myUser)) {
-		$cond = "1";
-	} else {
-		$cond = 'is_hidden = 0';
-	}
+		if (isSuperUser(Auth::user())) {
+			$cond = "1";
+		} else {
+			$cond = ["is_hidden" => false];
+		}

-	echoLongTable(
-		['a.id as group_id', 'a.title as title', 'a.is_hidden as is_hidden', 'count(b.username) as user_count'],
-		"`groups` a left join groups_users b on a.id = b.group_id",
-		$cond,
-		'group by a.id order by a.id asc',
-		$header,
-		function ($group) use ($myUser) {
-			echo '<tr class="text-center">';
-			echo '<td>';
-			echo '#', $group['group_id'], '</td>';
-	
-			echo '<td class="text-start">';
-			echo '<a class="text-decoration-none" href="/group/', $group['group_id'], '">', $group['title'], '</a>';
-			if ($group['is_hidden']) {
-				echo ' <span class="badge text-bg-danger"><i class="bi bi-eye-slash-fill"></i> ', UOJLocale::get('hidden'), '</span> ';
-			}
-			echo '</td>';
-	
-			echo "<td>{$group['user_count']}</td>";
-	
-			echo '</tr>';
-		},
-		[
-			'page_len' => 40,
-			'div_classes' => ['card', 'my-3'],
-			'table_classes' => ['table', 'uoj-table', 'mb-0'],
-			'head_pagination' => true,
-			'pagination_table' => "`groups`",
-		]
-	);
-	?>
+		echoLongTable(
+			['id', 'title', 'is_hidden'],
+			"`groups`",
+			$cond,
+			'order by id asc',
+			$header,
+			function ($group) {
+				$users_count = DB::selectCount([
+					"select count(*)",
+					"from", "groups_users",
+					"where", [
+						"group_id" => $group['id'],
+					],
+				]);

-<!-- end left col -->
-</div>
+				echo '<tr class="text-center">';
+				echo '<td>';
+				echo '#', $group['id'], '</td>';

-<!-- right col -->
-<aside class="col-lg-3 mt-3 mt-lg-0">
-<?php uojIncludeView('sidebar', array()); ?>
-</aside>
+				echo '<td class="text-start">';
+				echo '<a class="text-decoration-none" href="/group/', $group['id'], '">', $group['title'], '</a>';
+				if ($group['is_hidden']) {
+					echo ' <span class="badge text-bg-danger"><i class="bi bi-eye-slash-fill"></i> ', UOJLocale::get('hidden'), '</span> ';
+				}
+				echo '</td>';

+				echo "<td>{$users_count}</td>";
+
+				echo '</tr>';
+			},
+			[
+				'page_len' => 40,
+				'div_classes' => ['card', 'my-3'],
+				'table_classes' => ['table', 'uoj-table', 'mb-0'],
+				'head_pagination' => true,
+			]
+		);
+		?>
+		<!-- end left col -->
+	</div>
+
+	<!-- right col -->
+	<aside class="col-lg-3 mt-3 mt-lg-0">
+		<?php uojIncludeView('sidebar') ?>
+	</aside>
+	<!-- end right col -->
 </div>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/hack.php
+++ b/web/app/controllers/hack.php
@ -1,101 +1,117 @@
 <?php
-	requirePHPLib('form');
-	requireLib('bootstrap5');
-	requireLib('hljs');
+requirePHPLib('form');
+requirePHPLib('judger');
+requirePHPLib('data');
+requireLib('bootstrap5');
+requireLib('hljs');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+Auth::check() || redirectToLogin();
+UOJHack::init(UOJRequest::get('id')) || UOJResponse::page404();
+UOJHack::cur()->setProblem() || UOJResponse::page404();
+UOJHack::cur()->userCanView(Auth::user(), ['ensure' => true]);

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
+if (UOJHack::cur()->setSubmission()) {
+	UOJHack::cur()->submission->setAsCur();
+	UOJSubmission::cur()->setProblem(['problem' => UOJHack::cur()->problem]) || UOJResponse::page404();
+	UOJSubmission::cur()->userCanView(Auth::user(), ['ensure' => true]);
+}

-	if (!validateUInt($_GET['id']) || !($hack = queryHack($_GET['id']))) {
-		become404Page();
-	}
+if (UOJHack::cur()->userCanDelete(Auth::user())) {
+	$delete_form = new UOJBs4Form('delete');
+	$delete_form->handle = function () {
+		DB::delete([
+			"delete from hacks",
+			"where", ["id" => UOJHack::info('id')]
+		]);
+	};
+	$delete_form->submit_button_config['class_str'] = 'btn btn-danger';
+	$delete_form->submit_button_config['text'] = '删除此 Hack';
+	$delete_form->submit_button_config['align'] = 'end';
+	$delete_form->submit_button_config['smart_confirm'] = '';
+	$delete_form->succ_href = "/hacks";
+	$delete_form->runAtServer();
+}

-	$submission = querySubmission($hack['submission_id']);	
-	$problem = queryProblemBrief($submission['problem_id']);
-	$problem_extra_config = getProblemExtraConfig($problem);
+if (UOJHack::cur()->userCanReview(Auth::user())) {
+	$addex_form = new UOJBs4Form('addex');
+	$addex_form->handle = function () {
+		$input = UOJContext::storagePath() . UOJHack::info('input');
+		$new_in = "{$input}_in";
+		$new_out = "{$input}_out";
+		$reason = null;
+		$err = dataAddHackPoint(UOJHack::cur()->problem->info, $new_in, $new_out, $reason, Auth::user());
+		$err === '' || UOJResponse::message($err);
+		unlink($new_in);
+		unlink($new_out);
+		DB::update([
+			"update hacks",
+			"set", [
+				'status' => 'Judged',
+			], "where", ['id' => UOJHack::info('id')]
+		]);
+	};
+	$addex_form->submit_button_config['class_str'] = 'btn btn-danger mt-3';
+	$addex_form->submit_button_config['text'] = '确认无误，添加到测试数据';
+	$addex_form->submit_button_config['align'] = 'end';
+	$addex_form->submit_button_config['smart_confirm'] = '';
+	$addex_form->succ_href = "/hacks";
+	$addex_form->runAtServer();
+}

-	if ($submission['contest_id']) {
-		$contest = queryContest($submission['contest_id']);
-		genMoreContestInfo($contest);
-	} else {
-		$contest = null;
-	}
+$perm = UOJHack::cur()->viewerCanSeeComponents(Auth::user());
+?>
+<?php echoUOJPageHeader(UOJLocale::get('problems::hack') . ' #' . UOJHack::info('id')) ?>

-	if (!isHackVisibleToUser($hack, $problem, $myUser)) {
-		become403Page();
-	}
-	
-	if (isSuperUser($myUser)) {
-		$delete_form = new UOJForm('delete');
-		$delete_form->handle = function() {
-			global $hack;
-			DB::query("delete from hacks where id = {$hack['id']}");
-		};
-		$delete_form->submit_button_config['class_str'] = 'btn btn-danger';
-		$delete_form->submit_button_config['text'] = '删除此Hack';
-		$delete_form->submit_button_config['align'] = 'right';
-		$delete_form->submit_button_config['smart_confirm'] = '';
-		$delete_form->succ_href = "/hacks";
-		$delete_form->runAtServer();
-	}
-	
-	$should_show_content = hasViewPermission($problem_extra_config['view_content_type'], $myUser, $problem, $submission);
-	$should_show_all_details = hasViewPermission($problem_extra_config['view_all_details_type'], $myUser, $problem, $submission);
-	$should_show_details = hasViewPermission($problem_extra_config['view_details_type'], $myUser, $problem, $submission);
-	$should_show_details_to_me = isSuperUser($myUser);
-	if ($hack['success'] === null) {
-		$should_show_all_details = false;
-	}
-	if (!isSubmissionFullVisibleToUser($submission, $contest, $problem, $myUser)
-		|| !isHackFullVisibleToUser($hack, $contest, $problem, $myUser)) {
-		$should_show_content = $should_show_all_details = false;
-	}
-	
-	if ($should_show_all_details) {
-		$styler = new HackDetailsStyler();
-		if (!$should_show_details) {
-			$styler->fade_all_details = true;
-			$styler->show_small_tip = false;
-		}
-	}
-	?>
-<?php echoUOJPageHeader(UOJLocale::get('problems::hack').' #'.$hack['id']) ?>
-
-<h1 class="h3">
-	<?= UOJLocale::get('problems::hack').' #'.$hack['id'] ?>
+<h1>
+	<?= UOJLocale::get('problems::hack') . ' #' . UOJHack::info('id') ?>
 </h1>

-<?php echoHackListOnlyOne($hack, array('id_hidden' => ''), $myUser) ?>
-<?php if ($should_show_all_details): ?>
-	<div class="card border-info mb-3">
-		<div class="card-header bg-info">
-			<h4 class="card-title"><?= UOJLocale::get('details') ?></h4>
+<?php echoHackListOnlyOne(UOJHack::info(), [], Auth::user()) ?>
+
+<?php if (UOJHack::cur()->hasJudged()) : ?>
+	<?php if ($perm['high_level_details']) : ?>
+		<div class="card mb-3">
+			<div class="card-header fw-bold">
+				<?= UOJLocale::get('details') ?>
+			</div>
+			<div class="card-body p-0">
+				<?php
+				$styler = new HackDetailsStyler();
+				if (!$perm['low_level_details']) {
+					$styler->fade_all_details = true;
+					$styler->show_small_tip = false;
+				}
+				echoJudgmentDetails(UOJHack::info('details'), $styler, 'details');
+				?>
+				<?php if ($perm['manager_view'] && !$perm['low_level_details']) : ?>
+					<hr />
+					<h4 class="text-info">全部详细信息（仅管理员可见）</h4>
+					<?php echoHackDetails(UOJHack::info('details'), 'all_details') ?>
+				<?php endif ?>
+			</div>
 		</div>
-		<?php echoJudgementDetails($hack['details'], $styler, 'details') ?>
-		<?php if ($should_show_details_to_me): ?>
-			<?php if ($styler->fade_all_details): ?>
-				<hr />
-				<?php echoHackDetails($hack['details'], 'final_details') ?>
-			<?php endif ?>
-		<?php endif ?>
-	</div>
+	<?php endif ?>
 <?php endif ?>

-<h2 class="h3">
-	<?= UOJLocale::get('problems::submission').' #'.$submission['id'] ?>
+<h2 class="mt-3">
+	<?= UOJLocale::get('problems::submission') . ' #' . UOJSubmission::info('id') ?>
 </h2>

-<?php echoSubmissionsListOnlyOne($submission, array(), $myUser) ?>
-<?php if ($should_show_content): ?>
-	<?php echoSubmissionContent($submission, getProblemSubmissionRequirement($problem)) ?>
+<?php if (UOJSubmission::cur()) : ?>
+	<?php UOJSubmission::cur()->echoStatusTable(['show_actual_score' => $perm['score']], Auth::user()) ?>
+	<?php if ($perm['content'] || $perm['manager_view']) : ?>
+		<?php UOJSubmission::cur()->echoContent() ?>
+	<?php endif ?>
+<?php else : ?>
+	<h3 class="text-danger">提交记录信息损坏</h3>
 <?php endif ?>

-<?php if (isset($delete_form)): ?>
+<?php if (isset($delete_form)) : ?>
 	<?php $delete_form->printHTML() ?>
 <?php endif ?>
+
+<?php if (isset($addex_form)) : ?>
+	<?php $addex_form->printHTML() ?>
+<?php endif ?>
+
 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/hack_list.php
+++ b/web/app/controllers/hack_list.php
@ -1,60 +1,54 @@
 <?php
-	requireLib('bootstrap5');
+requireLib('bootstrap5');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+Auth::check() || redirectToLogin();

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
+$q_problem_id = isset($_GET['problem_id']) && validateUInt($_GET['problem_id']) ? $_GET['problem_id'] : null;
+$q_submission_id = isset($_GET['submission_id']) && validateUInt($_GET['submission_id']) ? $_GET['submission_id'] : null;
+$q_hacker = isset($_GET['hacker']) && validateUsername($_GET['hacker']) ? $_GET['hacker'] : null;
+$q_owner = isset($_GET['owner']) && validateUsername($_GET['owner']) ? $_GET['owner'] : null;

-	$conds = array();
+$conds = [];
+if ($q_problem_id != null) {
+	$conds[] = ["problem_id" => $q_problem_id];
+}
+if ($q_submission_id != null) {
+	$conds[] = ["submission_id" => $q_submission_id];
+}
+if ($q_hacker != null) {
+	$conds[] = ["hacker" => $q_hacker];
+}
+if ($q_owner != null) {
+	$conds[] = ["owner" => $q_owner];
+}

-	$q_problem_id = isset($_GET['problem_id']) && validateUInt($_GET['problem_id']) ? $_GET['problem_id'] : null;
-	$q_submission_id = isset($_GET['submission_id']) && validateUInt($_GET['submission_id']) ? $_GET['submission_id'] : null;
-	$q_hacker = isset($_GET['hacker']) && validateUsername($_GET['hacker']) ? $_GET['hacker'] : null;
-	$q_owner = isset($_GET['owner']) && validateUsername($_GET['owner']) ? $_GET['owner'] : null;
-	if ($q_problem_id != null) {
-		$conds[] = "problem_id = $q_problem_id";
+$selected_all = ' selected="selected"';
+$selected_succ = '';
+$selected_fail = '';
+if (isset($_GET['status']) && validateUInt($_GET['status'])) {
+	if ($_GET['status'] == 1) {
+		$selected_all = '';
+		$selected_succ = ' selected="selected"';
+		$conds[] = 'success = 1';
 	}
-	if ($q_submission_id != null) {
-		$conds[] = "submission_id = $q_submission_id";
+	if ($_GET['status'] == 2) {
+		$selected_all = '';
+		$selected_fail = ' selected="selected"';
+		$conds[] = 'success = 0';
 	}
-	if ($q_hacker != null) {
-		$conds[] = "hacker = '$q_hacker'";
-	}
-	if ($q_owner != null) {
-		$conds[] = "owner = '$q_owner'";
-	}
-	
-	$selected_all = ' selected="selected"';
-	$selected_succ ='';
-	$selected_fail ='';
-	if (isset($_GET['status']) && validateUInt($_GET['status'])) {
-		if ($_GET['status'] == 1) {
-			$selected_all = '';
-			$selected_succ =' selected="selected"';
-			$conds[] = 'success = 1';
-		}
-		if ($_GET['status'] == 2) {
-			$selected_all = '';
-			$selected_fail = ' selected="selected"';
-			$conds[] = 'success = 0';
-		}
-	}
-	
-	if ($conds) {
-		$cond = join($conds, ' and ');
-	} else {
-		$cond = '1';
-	}
-	
-	?>
+}
+
+if ($conds) {
+	$cond = $conds;
+} else {
+	$cond = '1';
+}
+
+?>
 <?php echoUOJPageHeader(UOJLocale::get('hacks')) ?>

-<h1 class="h2">
-<?= UOJLocale::get('hacks') ?>
+<h1>
+	<?= UOJLocale::get('hacks') ?>
 </h1>

 <div class="d-none d-sm-block mb-3">
@ -77,10 +71,10 @@
 			</label>
 			<div class="input-group">
 				<input type="text" class="form-control form-control-sm" name="hacker" id="input-hacker" value="<?= $q_hacker ?>" maxlength="20" style="width:10em" />
-				<?php if (Auth::check()): ?>
-				<a id="my-hacks" href="/hacks?hacker=<?= Auth::id() ?>" class="btn btn-outline-secondary btn-sm">
-					我的
-				</a>
+				<?php if (Auth::check()) : ?>
+					<a id="my-hacks" href="/hacks?hacker=<?= Auth::id() ?>" class="btn btn-outline-secondary btn-sm">
+						我的
+					</a>
 				<?php endif ?>
 			</div>
 			<script>
@ -97,10 +91,10 @@
 			</label>
 			<div class="input-group">
 				<input type="text" class="form-control form-control-sm" name="owner" id="input-owner" value="<?= $q_owner ?>" maxlength="20" style="width:10em" />
-				<?php if (Auth::check()): ?>
-				<a id="my-owners" href="/hacks?owner=<?= Auth::id() ?>" class="btn btn-outline-secondary btn-sm">
-					我的
-				</a>
+				<?php if (Auth::check()) : ?>
+					<a id="my-owners" href="/hacks?owner=<?= Auth::id() ?>" class="btn btn-outline-secondary btn-sm">
+						我的
+					</a>
 				<?php endif ?>
 			</div>
 			<script>
@ -116,9 +110,9 @@
 				<?= UOJLocale::get('problems::result') ?>:
 			</label>
 			<select class="form-select form-select-sm" id="input-status" name="status">
-				<option value=""<?= $selected_all?>>All</option>
-				<option value="1"<?= $selected_succ ?>>Success!</option>
-				<option value="2"<?= $selected_fail ?>>Failed.</option>
+				<option value="" <?= $selected_all ?>>All</option>
+				<option value="1" <?= $selected_succ ?>>Success!</option>
+				<option value="2" <?= $selected_fail ?>>Failed.</option>
 			</select>
 		</div>
 		<div class="col-auto">
@ -129,7 +123,9 @@
 	</form>
 </div>

-<?php echoHacksList($cond,
+<?php
+echoHacksList(
+	$cond,
 	'order by id desc',
 	[
 		'judge_time_hidden' => '',
@ -138,7 +134,8 @@
 			'table_classes' => ['table', 'mb-0', 'uoj-table', 'text-center'],
 		],
 	],
-	$myUser);
-	?>
+	Auth::user()
+);
+?>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/html2markdown.php
+++ b/web/app/controllers/html2markdown.php
@ -1,19 +1,18 @@
-<?php
-	requireLib('bootstrap5');
-	?>
+<?php requireLib('bootstrap5') ?>

 <?php echoUOJPageHeader(UOJLocale::get('html to markdown')) ?>

-<h1 class="h2">
+<h1>
 	<?= UOJLocale::get('html to markdown') ?>
 </h1>

 <style>
-#html, #markdown {
-	font-family: Cascadia Mono, Ubuntu Mono, Roboto Mono, Jetbrains Mono, Fira Code, Consolas, '思源黑体 Regular', '思源宋体 Light', '宋体', 'Courier New', monospace;
-	width: 100%;
-	min-height: 300px;
-}
+	#html,
+	#markdown {
+		font-family: Cascadia Mono, Ubuntu Mono, Roboto Mono, Jetbrains Mono, Fira Code, Consolas, '思源黑体 Regular', '思源宋体 Light', '宋体', 'Courier New', monospace;
+		width: 100%;
+		min-height: 300px;
+	}
 </style>

 <div class="card">
@ -35,11 +34,13 @@
 <?= HTML::js_src('/js/h2m.js') ?>

 <script>
-$(document).ready(function() {
-	$('#html').on('input', function() {
-		$('#markdown').val(h2m($('#html').val(), { converter: 'Gfm' }));
+	$(document).ready(function() {
+		$('#html').on('input', function() {
+			$('#markdown').val(h2m($('#html').val(), {
+				converter: 'Gfm'
+			}));
+		});
 	});
-});
 </script>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/image_hosting/get_image.php
+++ b/web/app/controllers/image_hosting/get_image.php
@ -1,24 +1,23 @@
 <?php
-	requirePHPLib('form');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		become403Page(UOJLocale::get('need login'));
-	}
+if (!Auth::check()) {
+	become403Page(UOJLocale::get('need login'));
+}

-	$name = $_GET['image_name'];
-	if (!validateString($name)) {
-		become404Page();
-	}
+$name = $_GET['image_name'];
+if (!validateString($name)) {
+	become404Page();
+}

-	$file_name = UOJContext::storagePath()."/image_hosting/$name.png";
+$file_name = UOJContext::storagePath() . "/image_hosting/$name.png";

-	$finfo = finfo_open(FILEINFO_MIME);
-	$mimetype = finfo_file($finfo, $file_name);
-	if ($mimetype === false) {
-		become404Page();
-	}
-	finfo_close($finfo);
-	
-	header("X-Sendfile: $file_name");
-	header("Content-type: $mimetype");
-	header("Cache-Control: max-age=604800", true);
+$finfo = finfo_open(FILEINFO_MIME);
+$mimetype = finfo_file($finfo, $file_name);
+if ($mimetype === false) {
+	become404Page();
+}
+finfo_close($finfo);
+
+header("X-Sendfile: $file_name");
+header("Content-type: $mimetype");
+header("Cache-Control: max-age=604800", true);
--- a/web/app/controllers/image_hosting/index.php
+++ b/web/app/controllers/image_hosting/index.php
@ -1,235 +1,241 @@
 <?php
-	use Gregwar\Captcha\PhraseBuilder;
-	use Gregwar\Captcha\CaptchaBuilder;

-	requirePHPLib('form');
-	requireLib('bootstrap5');
+use Gregwar\Captcha\PhraseBuilder;

-	if (!Auth::check()) {
-		redirectToLogin();
+requirePHPLib('form');
+requireLib('bootstrap5');
+
+Auth::check() || redirectToLogin();
+
+$extra = UOJUser::getExtra($user);
+$limit = $extra['image_hosting']['total_size_limit'];
+$used = DB::selectSingle([
+	"select sum(size)",
+	"from users_images",
+	"where", [
+		"uploader" => Auth::id(),
+	],
+]);
+$count = DB::selectCount([
+	"select count(*)",
+	"from users_images",
+	"where", [
+		"uploader" => Auth::id(),
+	],
+]);
+
+function throwError($msg) {
+	dieWithJsonData(['status' => 'error', 'message' => $msg]);
+}
+
+$allowedTypes = [IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_WEBP];
+if ($_POST['image_upload_file_submit'] == 'submit') {
+	if (!crsf_check()) {
+		throwError('expired');
 	}

-	if (!isNormalUser($myUser)) {
-		become403Page();
+	if (!isset($_SESSION['phrase']) || !PhraseBuilder::comparePhrases($_SESSION['phrase'], $_POST['captcha'])) {
+		throwError("bad_captcha");
 	}

-	$limit = $myUser['images_size_limit'];
-	$_result = DB::selectFirst("SELECT SUM(size), count(*) FROM `users_images` WHERE uploader = '{$myUser['username']}'");
-	$used = $_result["SUM(size)"];
-	$count = $_result["count(*)"];
-
-	function throwError($msg) {
-		dieWithJsonData(['status' => 'error', 'message' => $msg]);
+	if ($_FILES["image_upload_file"]["error"] > 0) {
+		throwError($_FILES["image_upload_file"]["error"]);
 	}

-	$allowedTypes = [IMAGETYPE_PNG, IMAGETYPE_JPEG];
-	if ($_POST['image_upload_file_submit'] == 'submit') {
-		if (!crsf_check()) {
-			throwError('expired');
-		}
+	if ($_FILES["image_upload_file"]["size"] > 5242880) { // 5 MB
+		throwError('too_large');
+	}

-		if (!isset($_SESSION['phrase']) || !PhraseBuilder::comparePhrases($_SESSION['phrase'], $_POST['captcha'])) {
-			throwError("bad_captcha");
-		}
+	if ($used + $_FILES["image_upload_file"]["size"] > $limit) {
+		throwError('storage_limit_exceeded');
+	}

-		if ($_FILES["image_upload_file"]["error"] > 0) {
-			throwError($_FILES["image_upload_file"]["error"]);
-		}
+	$size = getimagesize($_FILES['image_upload_file']['tmp_name']);

-		if ($_FILES["image_upload_file"]["size"] > 5242880) { // 5 MB
-			throwError('too_large');
-		}
+	if (!$size || !in_array($size[2], $allowedTypes)) {
+		throwError('not_a_image');
+	}

-		if ($used + $_FILES["image_upload_file"]["size"] > $limit) {
-			throwError('storage_limit_exceeded');
-		}
+	list($width, $height, $type) = $size;
+	$hash = hash_file("sha256", $_FILES['image_upload_file']['tmp_name']);
+	$scale = ceil($height / 600.0);

-		$size = getimagesize($_FILES['image_upload_file']['tmp_name']);
+	$watermark_text = UOJConfig::$data['profile']['oj-name-short'];
+	if (isSuperUser($myUser) && $_POST['watermark'] == 'no_watermark') {
+		$watermark_text = "";
+		$hash .= "__no_watermark";
+	} elseif ($_POST['watermark'] == 'site_shortname_and_username') {
+		$watermark_text .= ' @' . Auth::id();
+		$hash .= "__id_" . Auth::id();
+	}

-		if (!$size || !in_array($size[2], $allowedTypes)) {
-			throwError('not_a_image');
-		}
+	$existing_image = DB::selectFirst("SELECT * FROM users_images WHERE `hash` = '$hash'");

-		list($width, $height, $type) = $size;
-		$hash = hash_file("sha256", $_FILES['image_upload_file']['tmp_name']);
-		$scale = ceil($height / 600.0);
+	if ($existing_image) {
+		dieWithJsonData(['status' => 'success', 'path' => $existing_image['path']]);
+	}

-		$watermark_text = UOJConfig::$data['profile']['oj-name-short'];
-		if (isSuperUser($myUser) && $_POST['watermark'] == 'no_watermark') {
-			$watermark_text = "";
-			$hash .= "__no_watermark";
-		} elseif ($_POST['watermark'] == 'site_shortname_and_username') {
-			$watermark_text .= ' @'.Auth::id();
-			$hash .= "__id_".Auth::id();
-		}
+	$image = new Imagick($_FILES["image_upload_file"]["tmp_name"]);
+	$draw = new ImagickDraw();
+	$draw->setFont(UOJContext::documentRoot() . '/fonts/roboto-mono/RobotoMono-Bold.ttf');
+	$draw->setFontSize($scale * 14);
+	$draw->setGravity(Imagick::GRAVITY_SOUTHEAST);
+	$draw->setFillColor("rgba(100,100,100,0.5)");
+	$image->annotateImage($draw, 15, 10, 0, $watermark_text);
+	$draw->setFillColor("rgba(255,255,255,0.65)");
+	$image->annotateImage($draw, 15 + $scale, 10 + $scale, 0, $watermark_text);
+	$image->setImageFormat('png');
+	$image->writeImage();

-		$existing_image = DB::selectFirst("SELECT * FROM users_images WHERE `hash` = '$hash'");
+	if (($size = filesize($_FILES["image_upload_file"]["tmp_name"])) > 5242880) { // 5 MB
+		throwError('too_large');
+	}

-		if ($existing_image) {
-			dieWithJsonData(['status' => 'success', 'path' => $existing_image['path']]);
-		}
+	$filename = uojRandAvaiableFileName('/image_hosting/', 10, '.png');
+	if (!move_uploaded_file($_FILES["image_upload_file"]["tmp_name"], UOJContext::storagePath() . $filename)) {
+		throwError('unknown error');
+	}

-		$image = new Imagick($_FILES["image_upload_file"]["tmp_name"]);
-		$draw = new ImagickDraw();
-		$draw->setFont(UOJContext::documentRoot().'/fonts/roboto-mono/RobotoMono-Bold.ttf');
-		$draw->setFontSize($scale * 14);
-		$draw->setGravity(Imagick::GRAVITY_SOUTHEAST);
-		$draw->setFillColor("rgba(100,100,100,0.5)");
-		$image->annotateImage($draw, 15, 10, 0, $watermark_text);
-		$draw->setFillColor("rgba(255,255,255,0.65)");
-		$image->annotateImage($draw, 15 + $scale, 10 + $scale, 0, $watermark_text);
-		$image->setImageFormat('png');
-		$image->writeImage();
+	DB::insert("INSERT INTO users_images (`path`, uploader, width, height, upload_time, size, `hash`) VALUES ('$filename', '{$myUser['username']}', $width, $height, now(), {$_FILES["image_upload_file"]["size"]}, '$hash')");

-		if (($size = filesize($_FILES["image_upload_file"]["tmp_name"])) > 5242880) { // 5 MB
-			throwError('too_large');
-		}
+	dieWithJsonData(['status' => 'success', 'path' => $filename]);
+} elseif ($_POST['image_delete_submit'] == 'submit') {
+	crsf_defend();

-		$filename = uojRandAvaiableFileName('/image_hosting/', 10, '.png');
-		if (!move_uploaded_file($_FILES["image_upload_file"]["tmp_name"], UOJContext::storagePath().$filename)) {
-			throwError('unknown error');
-		}
-
-		DB::insert("INSERT INTO users_images (`path`, uploader, width, height, upload_time, size, `hash`) VALUES ('$filename', '{$myUser['username']}', $width, $height, now(), {$_FILES["image_upload_file"]["size"]}, '$hash')");
-
-		dieWithJsonData(['status' => 'success', 'path' => $filename]);
-	} elseif ($_POST['image_delete_submit'] == 'submit') {
-		crsf_defend();
-
-		$id = $_POST['image_delete_id'];
-		if (!validateUInt($id)) {
-			becomeMsgPage('ID 不合法。<a href="'.UOJContext::requestURI().'">返回</a>');
+	$id = $_POST['image_delete_id'];
+	if (!validateUInt($id)) {
+		becomeMsgPage('ID 不合法。<a href="' . UOJContext::requestURI() . '">返回</a>');
+	} else {
+		$result = DB::selectFirst("SELECT * from users_images WHERE id = $id");
+		if (!$result) {
+			becomeMsgPage('图片不存在。<a href="' . UOJContext::requestURI() . '">返回</a>');
 		} else {
-			$result = DB::selectFirst("SELECT * from users_images WHERE id = $id");
-			if (!$result) {
-				becomeMsgPage('图片不存在。<a href="'.UOJContext::requestURI().'">返回</a>');
-			} else {
-				unlink(UOJContext::storagePath().$result['path']);
-				DB::delete("DELETE FROM users_images WHERE id = $id");
+			unlink(UOJContext::storagePath() . $result['path']);
+			DB::delete("DELETE FROM users_images WHERE id = $id");

-				header("Location: ". UOJContext::requestURI());
-				die();
-			}
+			header("Location: " . UOJContext::requestURI());
+			die();
 		}
 	}
-	?>
+}
+?>

 <?php echoUOJPageHeader(UOJLocale::get('image hosting')) ?>

 <style>
-.drop {
-	display: flex;
-    align-items: center;
-    flex-direction: column;
-    justify-content: center;
-    align-self: center;
-    flex-grow: 0 !important;
-    width: 9em;
-    height: 8.75em;
-    user-select: none;
-    cursor: pointer;
-    margin-left: 0;
-    background: #fafafa;
-    border: 1px solid #e8e8e8;
-    box-sizing: border-box;
-    border-radius: 4px;
-}
+	.drop {
+		display: flex;
+		align-items: center;
+		flex-direction: column;
+		justify-content: center;
+		align-self: center;
+		flex-grow: 0 !important;
+		width: 9em;
+		height: 8.75em;
+		user-select: none;
+		cursor: pointer;
+		margin-left: 0;
+		background: #fafafa;
+		border: 1px solid #e8e8e8;
+		box-sizing: border-box;
+		border-radius: 4px;
+	}

-.drop:hover {
-    border-color: #89d1f5;
-}
+	.drop:hover {
+		border-color: #89d1f5;
+	}
 </style>

-<h1 class="h2">
+<h1>
 	<?= UOJLocale::get('image hosting') ?>
 </h1>

 <div class="card card-default">
-<div class="card-body">
-	<form class="row m-0" id="image-upload-form" method="post" enctype="multipart/form-data">
-		<div class="col-12 col-md-3 col-lg-3 order-1 drop mx-auto mx-md-0" id="image-upload-form-drop">
-			<svg aria-hidden="true" focusable="false" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" width="56" class="mb-2">
-				<g>
-					<path fill="#3498db" d="M424.49 120.48a12 12 0 0 0-17 0L272 256l-39.51-39.52a12 12 0 0 0-17 0L160 272v48h352V208zM64 336V128H48a48 48 0 0 0-48 48v256a48 48 0 0 0 48 48h384a48 48 0 0 0 48-48v-16H144a80.09 80.09 0 0 1-80-80z"></path>
-					<path fill="#89d1f5" d="M528 32H144a48 48 0 0 0-48 48v256a48 48 0 0 0 48 48h384a48 48 0 0 0 48-48V80a48 48 0 0 0-48-48zM208 80a48 48 0 1 1-48 48 48 48 0 0 1 48-48zm304 240H160v-48l55.52-55.52a12 12 0 0 1 17 0L272 256l135.52-135.52a12 12 0 0 1 17 0L512 208z"></path>
-				</g>
-			</svg>
-			<span id="select-image-text" class="small">点击此处选择图片</span>
-		</div>
-		<input id="image_upload_file" name="image_upload_file" type="file" accept="image/*" style="display: none;" />
-		<div class="modal fade" id="image-upload-modal" tabindex="-1" aria-hidden="true">
-			<div class="modal-dialog">
-				<div class="modal-content">
-					<div class="modal-header">
-						<h1 class="modal-title fs-5" id="exampleModalLabel">上传图片</h1>
-						<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
-					</div>
-					<div class="modal-body">
-						<div class="mb-3">
-							您确定要上传图片吗？
+	<div class="card-body">
+		<form class="row m-0" id="image-upload-form" method="post" enctype="multipart/form-data">
+			<div class="col-12 col-md-3 col-lg-3 order-1 drop mx-auto mx-md-0" id="image-upload-form-drop">
+				<svg aria-hidden="true" focusable="false" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" width="56" class="mb-2">
+					<g>
+						<path fill="#3498db" d="M424.49 120.48a12 12 0 0 0-17 0L272 256l-39.51-39.52a12 12 0 0 0-17 0L160 272v48h352V208zM64 336V128H48a48 48 0 0 0-48 48v256a48 48 0 0 0 48 48h384a48 48 0 0 0 48-48v-16H144a80.09 80.09 0 0 1-80-80z"></path>
+						<path fill="#89d1f5" d="M528 32H144a48 48 0 0 0-48 48v256a48 48 0 0 0 48 48h384a48 48 0 0 0 48-48V80a48 48 0 0 0-48-48zM208 80a48 48 0 1 1-48 48 48 48 0 0 1 48-48zm304 240H160v-48l55.52-55.52a12 12 0 0 1 17 0L272 256l135.52-135.52a12 12 0 0 1 17 0L512 208z"></path>
+					</g>
+				</svg>
+				<span id="select-image-text" class="small">点击此处选择图片</span>
+			</div>
+			<input id="image_upload_file" name="image_upload_file" type="file" accept="image/*" style="display: none;" />
+			<div class="modal fade" id="image-upload-modal" tabindex="-1" aria-hidden="true">
+				<div class="modal-dialog">
+					<div class="modal-content">
+						<div class="modal-header">
+							<h1 class="modal-title fs-5" id="exampleModalLabel">上传图片</h1>
+							<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
 						</div>
-						<div class="mb-3" id="modal-file-info"></div>
-						<div class="input-group">
-							<input type="text" class="form-control" id="input-captcha" name="captcha" placeholder="<?= UOJLocale::get('enter verification code') ?>" maxlength="20" />
-							<span class="input-group-text p-0 overflow-hidden rounded-0" style="border-bottom-right-radius: var(--bs-border-radius) !important">
-								<img id="captcha" class="col w-100 h-100" src="/captcha">
-							</span>
+						<div class="modal-body">
+							<div class="mb-3">
+								您确定要上传图片吗？
+							</div>
+							<div class="mb-3" id="modal-file-info"></div>
+							<div class="input-group">
+								<input type="text" class="form-control" id="input-captcha" name="captcha" placeholder="<?= UOJLocale::get('enter verification code') ?>" maxlength="20" />
+								<span class="input-group-text p-0 overflow-hidden rounded-0" style="border-bottom-right-radius: var(--bs-border-radius) !important">
+									<img id="captcha" class="col w-100 h-100" src="/captcha">
+								</span>
+							</div>
+							<div class="mt-3" id="modal-help-message" style="display: none"></div>
+						</div>
+						<div class="modal-footer">
+							<button type="button" class="btn btn-secondary" data-bs-dismiss="modal" id="cancel-upload">取消</button>
+							<button type="submit" class="btn btn-primary">确定</button>
 						</div>
-						<div class="mt-3" id="modal-help-message" style="display: none"></div>
-					</div>
-					<div class="modal-footer">
-						<button type="button" class="btn btn-secondary" data-bs-dismiss="modal" id="cancel-upload">取消</button>
-						<button type="submit" class="btn btn-primary">确定</button>
 					</div>
 				</div>
 			</div>
-		</div>
-		<div class="col-12 col-md-4 col-lg-2 order-2 mt-3 mt-md-0 ms-md-2">
-			<h2 class="h4">水印</h2>
-			<?php if (isSuperUser($myUser)): ?>
-			<div class="form-check d-inline-block d-md-block me-2">
-				<input class="form-check-input" type="radio" name="watermark" id="watermark-no_watermark" data-value="no_watermark">
-				<label class="form-check-label" for="watermark-no_watermark">
-					无水印
-				</label>
+			<div class="col-12 col-md-4 col-lg-2 order-2 mt-3 mt-md-0 ms-md-2">
+				<h2 class="h3">水印</h2>
+				<?php if (isSuperUser($myUser)) : ?>
+					<div class="form-check d-inline-block d-md-block me-2">
+						<input class="form-check-input" type="radio" name="watermark" id="watermark-no_watermark" data-value="no_watermark">
+						<label class="form-check-label" for="watermark-no_watermark">
+							无水印
+						</label>
+					</div>
+				<?php endif ?>
+				<div class="form-check d-inline-block d-md-block me-2">
+					<input class="form-check-input" type="radio" name="watermark" id="watermark-site_shortname" data-value="site_shortname" checked>
+					<label class="form-check-label" for="watermark-site_shortname">
+						<?= UOJConfig::$data['profile']['oj-name-short'] ?>
+					</label>
+				</div>
+				<div class="form-check d-inline-block d-md-block me-2">
+					<input class="form-check-input" type="radio" name="watermark" id="watermark-site_shortname_and_username" data-value="site_shortname_and_username">
+					<label class="form-check-label" for="watermark-site_shortname_and_username">
+						<?= UOJConfig::$data['profile']['oj-name-short'] ?> @<?= Auth::id() ?>
+					</label>
+				</div>
 			</div>
-			<?php endif ?>
-			<div class="form-check d-inline-block d-md-block me-2">
-				<input class="form-check-input" type="radio" name="watermark" id="watermark-site_shortname" data-value="site_shortname" checked>
-				<label class="form-check-label" for="watermark-site_shortname">
-					<?= UOJConfig::$data['profile']['oj-name-short'] ?>
-				</label>
+			<div class="col order-3 order-md-4 order-lg-3 mt-3 mt-lg-0 ms-lg-2">
+				<h2 class="h3">上传须知</h2>
+				<ul>
+					<li>上传的图片必须符合法律与社会道德；</li>
+					<li>图床仅供 S2OJ 站内使用，校外用户无法查看；</li>
+					<li>图片上传后会被自动转码为 PNG 格式；</li>
+					<li>在合适的地方插入图片即可引用。</li>
+				</ul>
+				<p class="small">更多信息可以查看 <a href="https://s2oj.github.io/#/user/apps/image_hosting" target="_blank">使用文档</a>。</p>
 			</div>
-			<div class="form-check d-inline-block d-md-block me-2">
-				<input class="form-check-input" type="radio" name="watermark" id="watermark-site_shortname_and_username" data-value="site_shortname_and_username">
-				<label class="form-check-label" for="watermark-site_shortname_and_username">
-					<?= UOJConfig::$data['profile']['oj-name-short'] ?> @<?= Auth::id() ?>
-				</label>
+			<div class="col-12 col-md-5 col-lg-3 order-4 order-md-3 order-lg-4 mt-3 mt-md-0 ms-md-2">
+				<h2 class="h3">使用统计</h2>
+				<div class="d-flex justify-content-between">
+					<span class="small">已用空间</span>
+					<span><?= round($used * 1.0 / 1024 / 1024, 2) ?> MB / <?= round($limit * 1.0 / 1024 / 1024, 2) ?> MB</span>
+				</div>
+				<div class="d-flex justify-content-between">
+					<span class="small">上传总数</span>
+					<span><?= $count ?> 张</span>
+				</div>
 			</div>
-		</div>
-		<div class="col order-3 order-md-4 order-lg-3 mt-3 mt-lg-0 ms-lg-2">
-			<h2 class="h4">上传须知</h2>
-			<ul>
-				<li>上传的图片必须符合法律与社会道德；</li>
-				<li>图床仅供 S2OJ 站内使用，校外用户无法查看；</li>
-				<li>图片上传后会被自动转码为 PNG 格式；</li>
-				<li>在合适的地方插入图片即可引用。</li>
-			</ul>
-			<p class="small">更多信息可以查看 <a href="https://s2oj.github.io/#/user/apps/image_hosting" target="_blank">使用文档</a>。</p>
-		</div>
-		<div class="col-12 col-md-5 col-lg-3 order-4 order-md-3 order-lg-4 mt-3 mt-md-0 ms-md-2">
-			<h2 class="h4">使用统计</h2>
-			<div class="d-flex justify-content-between">
-				<span class="small">已用空间</span>
-				<span><?= round($used * 1.0 / 1024 / 1024, 2) ?> MB / <?= round($limit * 1.0 / 1024 / 1024, 2) ?> MB</span>
-			</div>
-			<div class="d-flex justify-content-between">
-				<span class="small">上传总数</span>
-				<span><?= $count ?> 张</span>
-			</div>
-		</div>
-	</form>
-</div>
+		</form>
+	</div>
 </div>
 <div class="toast-container position-fixed bottom-0 start-0 ms-3 mb-4" style="z-index: 999999">
 	<div id="image-upload-toast" class="toast text-bg-danger align-items-center border-0" role="alert" aria-live="assertive" aria-atomic="true">
@ -242,130 +248,132 @@
 	</div>
 </div>
 <script>
-var image_upload_modal = new bootstrap.Modal('#image-upload-modal');
-var image_upload_toast = new bootstrap.Toast('#image-upload-toast', { delay: 2000 });
-var droppedFiles = false;
+	var image_upload_modal = new bootstrap.Modal('#image-upload-modal');
+	var image_upload_toast = new bootstrap.Toast('#image-upload-toast', {
+		delay: 2000
+	});
+	var droppedFiles = false;

-function refreshCaptcha() {
-	var timestamp = new Date().getTime();
-	$("#captcha").attr("src", "/captcha" + '?' + timestamp);
-}
-
-$("#captcha").click(function(e) {
-	refreshCaptcha();
-});
-
-$('#image-upload-form').submit(function(event) {
-	event.preventDefault();
-
-	var data = new FormData();
-	data.append('_token', "<?= crsf_token() ?>");
-	data.append('image_upload_file_submit', 'submit');
-	data.append('image_upload_file', $('#image_upload_file').prop('files')[0]);
-	data.append('watermark', $('input[name=watermark]:checked', this).data('value'));
-	data.append('captcha', $('#input-captcha').val());
-
-	if ($('#image_upload_file').prop('files')[0].size > 5242880) {
-		$('#modal-help-message').html('图片大小不能超过 5 MB。').show();
-
-		return false;
+	function refreshCaptcha() {
+		var timestamp = new Date().getTime();
+		$("#captcha").attr("src", "/captcha" + '?' + timestamp);
 	}

-	$('#modal-help-message').html('上传中...').show();
-
-	$.ajax({
-		method: 'POST',
-		processData: false,
-		contentType: false,
-		data: data,
-		success: function(data) {
-			if (data.status === 'success') {
-				image_upload_modal.hide();
-				location.reload();
-			} else {
-				if (data.message === 'bad_captcha') {
-					refreshCaptcha();
-					$('#modal-help-message').html('验证码错误。').show();
-				} else if (data.message === 'expired') {
-					$('#modal-help-message').html('页面过期，请刷新重试。').show();
-				} else if (data.message === 'storage_limit_exceeded') {
-					$('#modal-help-message').html('存储超限，请联系管理员提升限制。').show();
-				} else if (data.message === 'not_a_image') {
-					$('#modal-help-message').html('文件格式不受支持。').show();
-				} else if (data.message === 'too_large') {
-					$('#modal-help-message').html('图片大小不能超过 5 MB。').show();
-				}
-			}
-		},
-		error: function() {
-			$('#modal-help-message').html('上传失败，请刷新页面重试。').addClass('text-danger').show();
-		}
+	$("#captcha").click(function(e) {
+		refreshCaptcha();
 	});

-	return false;
-});
-$('#image-upload-form-drop').click(function() {
-	$('#image_upload_file').click();
-});
-$('#image-upload-form-drop').on('drag dragstart dragend dragover dragenter dragleave drop', function(e) {
-	e.preventDefault();
-	e.stopPropagation();
-}).on('dragover dragenter', function() {
-	$('#select-image-text').html('松开以上传');
-}).on('dragleave dragend drop', function() {
-	$('#select-image-text').html('点击此处选择图片');
-}).on('drop', function(e) {
-	$('#image_upload_file').prop('files', e.originalEvent.dataTransfer.files);
-	$('#image_upload_file').trigger('change');
-});
-$(document).on('paste', function(e) {
-	if (e.originalEvent.clipboardData) {
-		$('#image_upload_file').prop('files', e.originalEvent.clipboardData.files);
-	}
+	$('#image-upload-form').submit(function(event) {
+		event.preventDefault();

-	$('#image_upload_file').trigger('change');
-});
-$('#image-upload-modal').on('hide.bs.modal', function() {
-	$('#image-upload-form').trigger('reset');
-});
-$('#image_upload_file').change(function() {
-	var items = $(this).prop('files');
-	var file = null;
+		var data = new FormData();
+		data.append('_token', "<?= crsf_token() ?>");
+		data.append('image_upload_file_submit', 'submit');
+		data.append('image_upload_file', $('#image_upload_file').prop('files')[0]);
+		data.append('watermark', $('input[name=watermark]:checked', this).data('value'));
+		data.append('captcha', $('#input-captcha').val());

-	if (items && items.length) {
-        for (var i = 0; i < items.length; i++) {
-            if (items[i].type.indexOf('image') !== -1) {
-                file = items[i];
-                break;
-            }
-        }
-    }
+		if ($('#image_upload_file').prop('files')[0].size > 5242880) {
+			$('#modal-help-message').html('图片大小不能超过 5 MB。').show();

-	if (file) {
-		refreshCaptcha();
-		var watermark_type = $('input[name=watermark]:checked', '#image-upload-form').data('value');
-		var html = '';
-
-		html += '<p><img src="'+ URL.createObjectURL(file) +'" height="150" style="object-fit: contain"></p>';
-		html += '<p class="small">大小：<b>'+(file.size / 1024).toFixed(2)+'</b> KB。';
-
-		if (watermark_type === 'no_watermark') {
-			html += '不添加水印。';
-		} else if (watermark_type === 'site_shortname_and_username') {
-			html += '使用水印：<?= UOJConfig::$data['profile']['oj-name-short'] ?> @<?= Auth::id() ?>。';
-		} else {
-			html += '使用水印：<?= UOJConfig::$data['profile']['oj-name-short'] ?>。';
+			return false;
 		}

-		html += '</p>';
+		$('#modal-help-message').html('上传中...').show();

-		$('#modal-file-info').html(html);
-		$('#modal-help-message').html('').hide();
-		image_upload_modal.show();
-	} else {
-		image_upload_toast.show();
-	}
-});
+		$.ajax({
+			method: 'POST',
+			processData: false,
+			contentType: false,
+			data: data,
+			success: function(data) {
+				if (data.status === 'success') {
+					image_upload_modal.hide();
+					location.reload();
+				} else {
+					if (data.message === 'bad_captcha') {
+						refreshCaptcha();
+						$('#modal-help-message').html('验证码错误。').show();
+					} else if (data.message === 'expired') {
+						$('#modal-help-message').html('页面过期，请刷新重试。').show();
+					} else if (data.message === 'storage_limit_exceeded') {
+						$('#modal-help-message').html('存储超限，请联系管理员提升限制。').show();
+					} else if (data.message === 'not_a_image') {
+						$('#modal-help-message').html('文件格式不受支持。').show();
+					} else if (data.message === 'too_large') {
+						$('#modal-help-message').html('图片大小不能超过 5 MB。').show();
+					}
+				}
+			},
+			error: function() {
+				$('#modal-help-message').html('上传失败，请刷新页面重试。').addClass('text-danger').show();
+			}
+		});
+
+		return false;
+	});
+	$('#image-upload-form-drop').click(function() {
+		$('#image_upload_file').click();
+	});
+	$('#image-upload-form-drop').on('drag dragstart dragend dragover dragenter dragleave drop', function(e) {
+		e.preventDefault();
+		e.stopPropagation();
+	}).on('dragover dragenter', function() {
+		$('#select-image-text').html('松开以上传');
+	}).on('dragleave dragend drop', function() {
+		$('#select-image-text').html('点击此处选择图片');
+	}).on('drop', function(e) {
+		$('#image_upload_file').prop('files', e.originalEvent.dataTransfer.files);
+		$('#image_upload_file').trigger('change');
+	});
+	$(document).on('paste', function(e) {
+		if (e.originalEvent.clipboardData) {
+			$('#image_upload_file').prop('files', e.originalEvent.clipboardData.files);
+		}
+
+		$('#image_upload_file').trigger('change');
+	});
+	$('#image-upload-modal').on('hide.bs.modal', function() {
+		$('#image-upload-form').trigger('reset');
+	});
+	$('#image_upload_file').change(function() {
+		var items = $(this).prop('files');
+		var file = null;
+
+		if (items && items.length) {
+			for (var i = 0; i < items.length; i++) {
+				if (items[i].type.indexOf('image') !== -1) {
+					file = items[i];
+					break;
+				}
+			}
+		}
+
+		if (file) {
+			refreshCaptcha();
+			var watermark_type = $('input[name=watermark]:checked', '#image-upload-form').data('value');
+			var html = '';
+
+			html += '<p><img src="' + URL.createObjectURL(file) + '" height="150" style="object-fit: contain"></p>';
+			html += '<p class="small">大小：<b>' + (file.size / 1024).toFixed(2) + '</b> KB。';
+
+			if (watermark_type === 'no_watermark') {
+				html += '不添加水印。';
+			} else if (watermark_type === 'site_shortname_and_username') {
+				html += '使用水印：<?= UOJConfig::$data['profile']['oj-name-short'] ?> @<?= Auth::id() ?>。';
+			} else {
+				html += '使用水印：<?= UOJConfig::$data['profile']['oj-name-short'] ?>。';
+			}
+
+			html += '</p>';
+
+			$('#modal-file-info').html(html);
+			$('#modal-help-message').html('').hide();
+			image_upload_modal.show();
+		} else {
+			image_upload_toast.show();
+		}
+	});
 </script>

 <?php
@ -376,15 +384,15 @@ $pag_config = [
 	'cond' => "uploader = '{$myUser['username']}'",
 	'tail' => 'order by upload_time desc',
 ];
-	$pag = new Paginator($pag_config);
-	?>
+$pag = new Paginator($pag_config);
+?>

-<h2 class="h3 mt-4 mb-3">
+<h2 class="mt-4 mb-3">
 	我的图片
 </h2>

 <div class="row row-cols-1 row-cols-sm-2 row-cols-md-3 row-cols-lg-4 g-4">
-	<?php foreach ($pag->get() as $idx => $row): ?>
+	<?php foreach ($pag->get() as $idx => $row) : ?>
 		<div class="col">
 			<div class="card">
 				<img src="<?= $row['path'] ?>" class="card-img-top" height="200" style="object-fit: contain">
@ -392,9 +400,9 @@ $pag_config = [
 					<div class="d-flex flex-wrap justify-content-between">
 						<time><?= $row['upload_time'] ?></time>
 						<span>
-							<?php if ($row['size'] < 1024 * 512): ?>
+							<?php if ($row['size'] < 1024 * 512) : ?>
 								<?= round($row['size'] * 1.0 / 1024, 1) ?> KB
-							<?php else: ?>
+							<?php else : ?>
 								<?= round($row['size'] * 1.0 / 1024 / 1024, 1) ?> MB
 							<?php endif ?>
 						</span>
@ -423,7 +431,7 @@ $pag_config = [
 	<?php endforeach ?>
 </div>

-<?php if ($pag->isEmpty()): ?>
+<?php if ($pag->isEmpty()) : ?>
 	<div class="mt-4 text-muted">
 		<?= UOJLocale::get('none') ?>
 	</div>
@ -445,23 +453,25 @@ $pag_config = [
 </div>

 <script>
-$(document).ready(function() {
-	[...document.querySelectorAll('[data-bs-toggle="tooltip"]')].map(tooltipTriggerEl => new bootstrap.Tooltip(tooltipTriggerEl));
-});
+	$(document).ready(function() {
+		[...document.querySelectorAll('[data-bs-toggle="tooltip"]')].map(tooltipTriggerEl => new bootstrap.Tooltip(tooltipTriggerEl));
+	});

-var copy_url_toast = new bootstrap.Toast('#copy-url-toast', { delay: 2000 });
+	var copy_url_toast = new bootstrap.Toast('#copy-url-toast', {
+		delay: 2000
+	});

-$('.image-copy-url-button').click(function() {
-	var url = new URL($(this).data('image-path'), location.origin);
-	navigator.clipboard.writeText(url);
-	copy_url_toast.show();
-});
+	$('.image-copy-url-button').click(function() {
+		var url = new URL($(this).data('image-path'), location.origin);
+		navigator.clipboard.writeText(url);
+		copy_url_toast.show();
+	});

-$('.image-copy-md-button').click(function() {
-	var url = new URL($(this).data('image-path'), location.origin);
-	navigator.clipboard.writeText('![](' + url + ')');
-	copy_url_toast.show();
-});
+	$('.image-copy-md-button').click(function() {
+		var url = new URL($(this).data('image-path'), location.origin);
+		navigator.clipboard.writeText('![](' + url + ')');
+		copy_url_toast.show();
+	});
 </script>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/index.php
+++ b/web/app/controllers/index.php
@ -1,10 +1,21 @@
+<?php requireLib('bootstrap5'); ?>
 <?php
-	$blogs = DB::selectAll("select blogs.id, title, poster, post_time from important_blogs, blogs where is_hidden = 0 and important_blogs.blog_id = blogs.id order by level desc, important_blogs.blog_id desc limit 5");
-	$countdowns = DB::selectAll("select * from countdowns order by end_time asc");
-	$friend_links = DB::selectAll("select * from friend_links order by level desc, id asc");
-
-	requireLib('bootstrap5');
-	?>
+$blogs = DB::selectAll([
+	"select blogs.id, title, poster, post_time from important_blogs inner join blogs on important_blogs.blog_id = blogs.id",
+	"where", [
+		"is_hidden" => 0,
+	], "order by level desc, important_blogs.blog_id desc",
+	DB::limit(5)
+]);
+$countdowns = DB::selectAll([
+	"select title, end_time from countdowns",
+	"order by end_time asc",
+]);
+$friend_links = DB::selectAll([
+	"select title, url from friend_links",
+	"order by level desc, id asc",
+]);
+?>
 <?php echoUOJPageHeader(UOJConfig::$data['profile']['oj-name-short']) ?>
 <div class="row">
 	<div class="col-lg-9">
@ -21,27 +32,23 @@
 							<th style="width:20%"></th>
 						</tr>
 					</thead>
-						<tbody>
+					<tbody>
 						<?php $now_cnt = 0; ?>
-						<?php foreach ($blogs as $blog): ?>
+						<?php foreach ($blogs as $blog_info) : ?>
 							<?php
-									$now_cnt++;
-							$new_tag = '';
-							if ((time() - strtotime($blog['post_time'])) / 3600 / 24 <= 7) {
-								$new_tag = '<sup style="color:red">&nbsp;new</sup>';
-							}
+							$blog = new UOJBlog($blog_info);
+							$now_cnt++;
 							?>
 							<tr>
-								<td>
-									<a href="/blogs/<?= $blog['id'] ?>" class="text-decoration-none"><?= $blog['title'] ?></a>
-									<?= $new_tag ?>
-								</td>
-								<td>by <?= getUserLink($blog['poster']) ?></td>
-								<td><small><?= $blog['post_time'] ?></small></td>
+								<td><?= $blog->getLink(['show_new_tag' => true]) ?></td>
+								<td>by <?= getUserLink($blog->info['poster']) ?></td>
+								<td><small><?= $blog->info['post_time'] ?></small></td>
 							</tr>
 						<?php endforeach ?>
-						<?php for ($i = $now_cnt + 1; $i <= 5; $i++): ?>
-							<tr><td colspan="233">&nbsp;</td></tr>
+						<?php for ($i = $now_cnt + 1; $i <= 5; $i++) : ?>
+							<tr>
+								<td colspan="233">&nbsp;</td>
+							</tr>
 						<?php endfor ?>
 					</tbody>
 				</table>
@ -52,27 +59,19 @@
 				</div>
 			</div>
 		</div>
-		<?php if (!UOJConfig::$data['switch']['force-login'] || Auth::check()): ?>
-			<?php if (!UOJConfig::$data['switch']['force-login'] || isNormalUser($myUser)): ?>
-			
+		<?php if (Auth::check()) : ?>
 			<div class="mt-4 card">
 				<div class="card-body">
-					<h4 class="card-title"><?= UOJLocale::get('top solver') ?></h4>
-					<?php echoRanklist([
-						'echo_full' => true,
-						'top10' => true,
-						'by_accepted' => true,
-						'table_classes' => ['table', 'text-center'],
-					]) ?>
-					<div class="text-center">
+					<h4 class="card-title mb-2"><?= UOJLocale::get('top solver') ?></h4>
+					<?php UOJRanklist::printHTML(['top10' => true]) ?>
+					<div class="text-center mt-2">
 						<a href="/solverlist" class="text-decoration-none">
 							<?= UOJLocale::get('view all') ?>
 						</a>
 					</div>
 				</div>
 			</div>
-			<?php endif ?>
-		<?php else: ?>
+		<?php else : ?>
 			<div class="mt-4 card card-default">
 				<div class="card-body text-center">
 					请 <a role="button" class="btn btn-outline-primary" href="<?= HTML::url('/login') ?>">登录</a> 以查看更多内容。
@ -90,22 +89,22 @@
 			</div>
 			<div class="card-body">
 				<ul class="list-unstyled mb-0">
-					<?php foreach ($countdowns as $countdown): ?>
+					<?php foreach ($countdowns as $countdown) : ?>
 						<?php
-							$enddate = strtotime($countdown['end_time']);
+						$enddate = strtotime($countdown['end_time']);
 						$nowdate = time();
-						$diff = floor(($enddate - $nowdate) / (24 * 60 * 60));
+						$diff = ceil(($enddate - $nowdate) / (24 * 60 * 60));
 						?>
 						<li>
-							<?php if ($diff > 0): ?>
+							<?php if ($diff > 0) : ?>
 								<?= UOJLocale::get('x days until countdown title', $countdown['title'], $diff) ?>
-							<?php else: ?>
+							<?php else : ?>
 								<?= UOJLocale::get("countdown title has begun", $countdown['title']) ?>
 							<?php endif ?>
 						</li>
 					<?php endforeach ?>
 				</ul>
-				<?php if (count($countdowns) == 0): ?>
+				<?php if (count($countdowns) == 0) : ?>
 					<div class="text-center">
 						<?= UOJLocale::get('none') ?>
 					</div>
@ -113,7 +112,7 @@
 			</div>
 		</div>

-		<?php if (Auth::check()): ?>
+		<?php if (Auth::check()) : ?>
 			<?php uojIncludeView('sidebar', ['assignments_hidden' => '', 'groups_hidden' => '']) ?>
 		<?php endif ?>

@ -123,15 +122,15 @@
 			</div>
 			<div class="card-body">
 				<ul class="ps-3 mb-0">
-					<?php foreach ($friend_links as $friend_link): ?>
+					<?php foreach ($friend_links as $friend_link) : ?>
 						<li>
-							<a class="text-decoration-none"	href="<?= $friend_link['url'] ?>" target="_blank">
+							<a class="text-decoration-none" href="<?= $friend_link['url'] ?>" target="_blank">
 								<?= $friend_link['title'] ?>
 							</a>
 						</li>
 					<?php endforeach ?>
 				</ul>
-				<?php if (count($friend_links) == 0): ?>
+				<?php if (count($friend_links) == 0) : ?>
 					<div class="text-center">
 						<?= UOJLocale::get('none') ?>
 					</div>
--- a/web/app/controllers/judge/download.php
+++ b/web/app/controllers/judge/download.php
@ -1,43 +0,0 @@
-<?php
-	requirePHPLib('judger');
-	
-	if (!authenticateJudger()) {
-		become404Page();
-	}
-	
-	switch ($_GET['type']) {
-		case 'submission':		
-			$file_name = UOJContext::storagePath()."/submission/{$_GET['id']}/{$_GET['rand_str_id']}";
-			$download_name = "submission.zip";
-			break;
-		case 'tmp':
-			$file_name = UOJContext::storagePath()."/tmp/{$_GET['rand_str_id']}";
-			$download_name = "tmp";
-			break;
-		case 'problem':
-			$id = $_GET['id'];
-			if (!validateUInt($id) || !($problem = queryProblemBrief($id))) {
-				become404Page();
-			}
-			$file_name = "/var/uoj_data/$id.zip";
-			$download_name = "$id.zip";
-			break;
-		case 'judger':
-			$file_name = UOJContext::storagePath()."/judge_client.zip";
-			$download_name = "judge_client.zip";
-			break;
-		default:
-			become404Page();
-	}
-	
-	$finfo = finfo_open(FILEINFO_MIME);
-	$mimetype = finfo_file($finfo, $file_name);
-	if ($mimetype === false) {
-		become404Page();
-	}
-	finfo_close($finfo);
-	
-	header("X-Sendfile: $file_name");
-	header("Content-type: $mimetype");
-	header("Content-Disposition: attachment; filename=$download_name");
-	?>
--- a/web/app/controllers/judge/submit.php
+++ b/web/app/controllers/judge/submit.php
@ -1,212 +1,400 @@
 <?php
-	requirePHPLib('judger');
-	requirePHPLib('data');
-	
-	if (!authenticateJudger()) {
-		become404Page();
+requirePHPLib('judger');
+requirePHPLib('data');
+
+if (!authenticateJudger()) {
+	UOJResponse::page404();
+}
+
+function submissionJudged() {
+	UOJSubmission::onJudged(UOJRequest::post('id'), UOJRequest::post('result'), UOJRequest::post('judge_time'));
+}
+
+function customTestSubmissionJudged() {
+	$submission = DB::selectFirst([
+		"select submitter, status, content, result, problem_id from custom_test_submissions",
+		"where", ['id' => $_POST['id']]
+	]);
+	if ($submission == null) {
+		return;
 	}
-	
-	function submissionJudged() {
-		$submission = DB::selectFirst("select submitter, status, content, result, problem_id from submissions where id = {$_POST['id']}");
-		if ($submission == null) {
+	if ($submission['status'] != 'Judging') {
+		return;
+	}
+	$result = json_decode($_POST['result'], true);
+	$result['details'] = uojTextEncode($result['details']);
+	DB::update([
+		"update custom_test_submissions",
+		"set", [
+			'status' => $result['status'],
+			'status_details' => '',
+			'result' => json_encode($result, JSON_UNESCAPED_UNICODE)
+		], "where", ['id' => $_POST['id']]
+	]);
+}
+
+function hackJudged() {
+	$result = json_decode($_POST['result'], true);
+
+	UOJHack::init($_POST['id']);
+	UOJHack::cur()->setProblem();
+	UOJHack::cur()->setSubmission();
+
+	if ($result['score']) {
+		$status = 'Judged, Waiting';
+	} else {
+		$status = 'Judged';
+	}
+
+	$ok = DB::update([
+		"update hacks",
+		"set", [
+			'success' => $result['score'],
+			'status' => $status,
+			'details' => uojTextEncode($result['details'])
+		], "where", ['id' => $_POST['id']]
+	]);
+
+	if (!$result['score']) {
+		return;
+	}
+	if (!$ok) {
+		return;
+	}
+
+	if (!(validateUploadedFile('hack_input') && validateUploadedFile('std_output'))) {
+		UOJLog::error("hack successfully but received no data. id: {$_POST['id']}");
+		return;
+	}
+
+	$input = UOJContext::storagePath() . UOJHack::info('input');
+	$up_in = $_FILES["hack_input"]['tmp_name'];
+	$up_out = $_FILES["std_output"]['tmp_name'];
+
+	if (!UOJHack::cur()->problem->needToReviewHack()) {
+		$err = dataAddHackPoint(UOJHack::cur()->problem->info, $up_in, $up_out);
+		if ($err === '') {
+			unlink($input);
+			DB::update([
+				"update hacks",
+				"set", [
+					'status' => 'Judged'
+				], "where", ['id' => $_POST['id']]
+			]);
 			return;
-		}
-		if ($submission['status'] != 'Judging' && $submission['status'] != 'Judged, Judging') {
-			return;
-		}
-		$content = json_decode($submission['content'], true);
-		
-		if (isset($content['first_test_config'])) {
-			$result = json_decode($submission['result'], true);
-			$result['final_result'] = json_decode($_POST['result'], true);
-			$result['final_result']['details'] = uojTextEncode($result['final_result']['details']);
-			$esc_result = DB::escape(json_encode($result, JSON_UNESCAPED_UNICODE));
-			
-			$content['final_test_config'] = $content['config'];
-			$content['config'] = $content['first_test_config'];
-			unset($content['first_test_config']);
-			$esc_content = DB::escape(json_encode($content));
-			
-			DB::update("update submissions set status = 'Judged', result = '$esc_result', content = '$esc_content' where id = {$_POST['id']}");
 		} else {
-			$result = json_decode($_POST['result'], true);
-			$result['details'] = uojTextEncode($result['details']);
-			$esc_result = DB::escape(json_encode($result, JSON_UNESCAPED_UNICODE));
-			if (isset($result["error"])) {
-				DB::update("update submissions set status = '{$result['status']}', result_error = '{$result['error']}', result = '$esc_result', score = null, used_time = null, used_memory = null where id = {$_POST['id']}");
+			UOJLog::error("hack successfully but failed to add an extra test: {$err}");
+		}
+	}
+	move_uploaded_file($up_in, "{$input}_in");
+	move_uploaded_file($up_out, "{$input}_out");
+	DB::update([
+		"update hacks",
+		"set", [
+			'status' => 'Judged, WaitingM'
+		], "where", ['id' => $_POST['id']]
+	]);
+}
+
+if (isset($_POST['submit'])) {
+	if (!validateUInt($_POST['id'])) {
+		die("Wow! hacker! T_T....");
+	}
+	if (isset($_POST['is_hack'])) {
+		hackJudged();
+	} elseif (isset($_POST['is_custom_test'])) {
+		customTestSubmissionJudged();
+	} else {
+		submissionJudged();
+	}
+}
+if (isset($_POST['update-status'])) {
+	if (!validateUInt($_POST['id'])) {
+		die("Wow! hacker! T_T....");
+	}
+
+	$status_details = $_POST['status'];
+	if (isset($_POST['is_custom_test'])) {
+		DB::update([
+			"update custom_test_submissions",
+			"set", ["status_details" => $status_details],
+			"where", ["id" => $_POST['id']]
+		]);
+	} else {
+		DB::update([
+			"update submissions",
+			"set", ["status_details" => $status_details],
+			"where", ["id" => $_POST['id']]
+		]);
+	}
+	die();
+}
+
+$problem_ban_list = DB::selectAll([
+	"select id from problems",
+	"where", [
+		["assigned_to_judger", "!=", "any"],
+		["assigned_to_judger", "!=", $_POST['judger_name']]
+	]
+]);
+foreach ($problem_ban_list as &$val) {
+	$val = $val['id'];
+}
+$assignCond = $problem_ban_list ? [["problem_id", "not in", DB::rawtuple($problem_ban_list)]] : [];
+
+$submission = null;
+$hack = null;
+function querySubmissionToJudge($status, $set_q) {
+	global $assignCond;
+
+	for ($times = 0; $times < 10; $times++) {
+		$submission = DB::selectFirst([
+			"select id from submissions",
+			"where", array_merge(["status" => $status], $assignCond),
+			"order by id limit 1"
+		]);
+		if (!$submission) {
+			return null;
+		}
+
+		$ok = DB::transaction(function () use (&$submission, $set_q, $status) {
+			DB::update([
+				"update submissions",
+				"set", $set_q,
+				"where", [
+					"id" => $submission['id'],
+					"status" => $status
+				]
+			]);
+			if (DB::affected_rows() == 1) {
+				$submission = DB::selectFirst([
+					"select id, problem_id, content, status, judge_time from submissions",
+					"where", ["id" => $submission['id']]
+				]);
+				return true;
 			} else {
-				DB::update("update submissions set status = '{$result['status']}', result_error = null, result = '$esc_result', score = {$result['score']}, used_time = {$result['time']}, used_memory = {$result['memory']} where id = {$_POST['id']}");
-			}
-			
-			if (isset($content['final_test_config'])) {
-				$content['first_test_config'] = $content['config'];
-				$content['config'] = $content['final_test_config'];
-				unset($content['final_test_config']);
-				$esc_content = DB::escape(json_encode($content));
-			
-				DB::update("update submissions set status = 'Judged, Waiting', content = '$esc_content' where id = ${_POST['id']}");
-			}
-		}
-		DB::update("update submissions set status_details = '' where id = {$_POST['id']}");
-		updateBestACSubmissions($submission['submitter'], $submission['problem_id']);
-	}
-
-	function customTestSubmissionJudged() {
-		$submission = DB::selectFirst("select submitter, status, content, result, problem_id from custom_test_submissions where id = {$_POST['id']}");
-		if ($submission == null) {
-			return;
-		}
-		if ($submission['status'] != 'Judging') {
-			return;
-		}
-		$content = json_decode($submission['content'], true);
-		$result = json_decode($_POST['result'], true);
-		$result['details'] = uojTextEncode($result['details']);
-		$esc_result = DB::escape(json_encode($result, JSON_UNESCAPED_UNICODE));
-		if (isset($result["error"])) {
-			DB::update("update custom_test_submissions set status = '{$result['status']}', result = '$esc_result' where id = {$_POST['id']}");
-		} else {
-			DB::update("update custom_test_submissions set status = '{$result['status']}', result = '$esc_result' where id = {$_POST['id']}");
-		}
-		DB::update("update custom_test_submissions set status_details = '' where id = {$_POST['id']}");
-	}
-	
-	function hackJudged() {
-		$result = json_decode($_POST['result'], true);
-		$esc_details = DB::escape(uojTextEncode($result['details']));
-		$ok = DB::update("update hacks set success = {$result['score']}, details = '$esc_details' where id = {$_POST['id']}");
-		
-		if ($ok) {
-			list($hack_input) = DB::fetch(DB::query("select input from hacks where id = {$_POST['id']}"), MYSQLI_NUM);
-			unlink(UOJContext::storagePath().$hack_input);
-
-			if ($result['score']) {
-				list($problem_id) = DB::selectFirst("select problem_id from hacks where id = ${_POST['id']}", MYSQLI_NUM);
-				if (validateUploadedFile('hack_input') && validateUploadedFile('std_output')) {
-					dataAddExtraTest(queryProblemBrief($problem_id), $_FILES["hack_input"]["tmp_name"], $_FILES["std_output"]["tmp_name"]);
-				} else {
-					error_log("hack successfully but received no data. id: ${_POST['id']}");
-				}
-			}
-		}
-	}
-	
-	if (isset($_POST['submit'])) {
-		if (!validateUInt($_POST['id'])) {
-			die("Wow! hacker! T_T....");
-		}
-		if (isset($_POST['is_hack'])) {
-			hackJudged();
-		} elseif (isset($_POST['is_custom_test'])) {
-			customTestSubmissionJudged();
-		} else {
-			submissionJudged();
-		}
-	}
-	if (isset($_POST['update-status'])) {
-		if (!validateUInt($_POST['id'])) {
-			die("Wow! hacker! T_T....");
-		}
-		$esc_status_details = DB::escape($_POST['status']);
-		if (isset($_POST['is_custom_test'])) {
-			DB::update("update custom_test_submissions set status_details = '$esc_status_details' where id = {$_POST['id']}");
-		} else {
-			DB::update("update submissions set status_details = '$esc_status_details' where id = {$_POST['id']}");
-		}
-		die();
-	}
-	
-	$submission = null;
-	$hack = null;
-	function querySubmissionToJudge($status, $set_q) {
-		global $submission;
-		$submission = DB::selectFirst("select id, problem_id, content from submissions where status = '$status' order by id limit 1");
-		if ($submission) {
-			DB::update("update submissions set $set_q where id = {$submission['id']} and status = '$status'");
-			if (DB::affected_rows() != 1) {
-				$submission = null;
-			}
-		}
-	}
-	function queryCustomTestSubmissionToJudge() {
-		global $submission;
-		$submission = DB::selectFirst("select id, problem_id, content from custom_test_submissions where judge_time is null order by id limit 1");
-		if ($submission) {
-			DB::update("update custom_test_submissions set judge_time = now(), status = 'Judging' where id = {$submission['id']} and judge_time is null");
-			if (DB::affected_rows() != 1) {
-				$submission = null;
-			}
-		}
-		if ($submission) {
-			$submission['is_custom_test'] = '';
-		}
-	}
-	function queryHackToJudge() {
-		global $hack;
-		$hack = DB::selectFirst("select id, submission_id, input, input_type from hacks where judge_time is null order by id limit 1");
-		if ($hack) {
-			DB::update("update hacks set judge_time = now() where id = {$hack['id']} and judge_time is null");
-			if (DB::affected_rows() != 1) {
-				$hack = null;
-			}
-		}
-	}
-	function findSubmissionToJudge() {
-		global $submission, $hack;
-		querySubmissionToJudge('Waiting', "judge_time = now(), status = 'Judging'");
-		if ($submission) {
-			return true;
-		}
-
-		queryCustomTestSubmissionToJudge();
-		if ($submission) {
-			return true;
-		}
-		
-		querySubmissionToJudge('Waiting Rejudge', "judge_time = now(), status = 'Judging'");
-		if ($submission) {
-			return true;
-		}
-		
-		querySubmissionToJudge('Judged, Waiting', "status = 'Judged, Judging'");
-		if ($submission) {
-			return true;
-		}
-		
-		queryHackToJudge();
-		if ($hack) {
-			$submission = DB::selectFirst("select id, problem_id, content from submissions where id = {$hack['submission_id']} and score = 100");
-			if (!$submission) {
-				$details = "<error>the score gained by the hacked submission is not 100.\n</error>";
-				$esc_details = DB::escape(uojTextEncode($details));
-				DB::update("update hacks set success = 0, details = '$esc_details' where id = {$hack['id']}");
 				return false;
 			}
-			return true;
+		});
+		if ($ok) {
+			return $submission;
 		}
-		return false;
 	}
-	
-	
-	
-	if (isset($_POST['fetch_new']) && !$_POST['fetch_new']) {
-		die("Nothing to judge");
+}
+function queryMinorSubmissionToJudge($status, $set_q) {
+	global $assignCond;
+
+	for ($times = 0; $times < 10; $times++) {
+		$submission = null;
+		$his = DB::selectFirst([
+			"select id, submission_id from submissions_history",
+			"where", ["status" => $status, "major" => 0], // $assignCond is removed!!! fix this bug in the future!
+			"order by id limit 1"
+		]);
+		if (!$his) {
+			return null;
+		}
+
+		$ok = DB::transaction(function () use (&$submission, &$his, $set_q, $status) {
+			$submission = DB::selectFirst([
+				"select id, problem_id, content from submissions",
+				"where", ["id" => $his['submission_id']], DB::for_share()
+			]);
+			if (!$submission) {
+				return false;
+			}
+			DB::update([
+				"update submissions_history",
+				"set", $set_q,
+				"where", [
+					"id" => $his['id'],
+					"status" => $status
+				]
+			]);
+			if (DB::affected_rows() == 1) {
+				$ret = DB::selectFirst([
+					"select status, judge_time from submissions_history",
+					"where", ["id" => $his['id']]
+				]);
+				if ($ret === false) {
+					return false;
+				}
+				$submission += $ret;
+				return true;
+			} else {
+				return false;
+			}
+		});
+		if ($ok) {
+			return $submission;
+		}
 	}
-	if (!findSubmissionToJudge()) {
-		die("Nothing to judge");
+}
+function queryCustomTestSubmissionToJudge() {
+	global $assignCond;
+
+	while (true) {
+		$submission = DB::selectFirst([
+			"select id, problem_id, content from custom_test_submissions",
+			"where", array_merge(["judge_time" => null], $assignCond),
+			"order by id limit 1"
+		]);
+		if (!$submission) {
+			return null;
+		}
+		$submission['is_custom_test'] = '';
+
+		DB::update([
+			"update custom_test_submissions",
+			"set", [
+				"judge_time" => DB::now(),
+				"status" => 'Judging'
+			], "where", [
+				"id" => $submission['id'],
+				"judge_time" => null
+			]
+		]);
+		if (DB::affected_rows() == 1) {
+			$submission['status'] = 'Judging';
+			return $submission;
+		}
 	}
-	
-	$submission['id'] = (int)$submission['id'];
-	$submission['problem_id'] = (int)$submission['problem_id'];
-	$submission['problem_mtime'] = filemtime("/var/uoj_data/{$submission['problem_id']}");
-	$submission['content'] = json_decode($submission['content']);
-	
+}
+function queryHackToJudge() {
+	global $assignCond;
+
+	while (true) {
+		if (DB::selectFirst([
+			"select 1 from hacks",
+			"where", [
+				["status", "!=", "Waiting"],
+				["status", "!=", "Judged"],
+			], "order by id limit 1"
+		])) {
+			return null;
+		}
+
+		$hack = DB::selectFirst([
+			"select id, submission_id, input, input_type from hacks",
+			"where", array_merge(["judge_time" => null], $assignCond),
+			"order by id limit 1"
+		]);
+		if (!$hack) {
+			return null;
+		}
+
+		DB::update([
+			"update hacks",
+			"set", [
+				"judge_time" => DB::now(),
+				"status" => 'Judging'
+			],
+			"where", [
+				"id" => $hack['id'],
+				"judge_time" => null
+			]
+		]);
+		if (DB::affected_rows() == 1) {
+			$hack['status'] = 'Judging';
+			return $hack;
+		}
+	}
+}
+function findSubmissionToJudge() {
+	global $submission, $hack;
+	$submission = querySubmissionToJudge('Waiting', [
+		"judge_time" => DB::now(),
+		"judger" => $_POST['judger_name'],
+		"status" => 'Judging'
+	]);
+	if ($submission) {
+		return true;
+	}
+
+	$submission = queryCustomTestSubmissionToJudge();
+	if ($submission) {
+		return true;
+	}
+
+	$submission = querySubmissionToJudge('Waiting Rejudge', [
+		"judge_time" => DB::now(),
+		"judger" => $_POST['judger_name'],
+		"status" => 'Judging'
+	]);
+	if ($submission) {
+		return true;
+	}
+
+	$submission = querySubmissionToJudge('Judged, Waiting', [
+		"status" => 'Judged, Judging'
+	]);
+	if ($submission) {
+		return true;
+	}
+
+	$submission = queryMinorSubmissionToJudge('Waiting Rejudge', [
+		"judge_time" => DB::now(),
+		"judger" => $_POST['judger_name'],
+		"status" => 'Judging'
+	]);
+	if ($submission) {
+		return true;
+	}
+
+	$submission = queryMinorSubmissionToJudge('Judged, Waiting', [
+		"status" => 'Judged, Judging'
+	]);
+	if ($submission) {
+		return true;
+	}
+
+	$hack = queryHackToJudge();
 	if ($hack) {
-		$submission['is_hack'] = "";
-		$submission['hack']['id'] = (int)$hack['id'];
-		$submission['hack']['input'] = $hack['input'];
-		$submission['hack']['input_type'] = $hack['input_type'];
+		$submission = DB::selectFirst([
+			"select id, problem_id, content from submissions",
+			"where", [
+				"id" => $hack['submission_id'],
+				"score" => 100
+			]
+		]);
+		if (!$submission) {
+			$details = "<error>the score gained by the hacked submission is not 100.</error>";
+			DB::update([
+				"update hacks",
+				"set", [
+					'success' => 0,
+					'status' => 'Judged',
+					'details' => uojTextEncode($details)
+				], "where", ["id" => $hack['id']]
+			]);
+			return false;
+		}
+		return true;
 	}
-	
-	echo json_encode($submission);
-	?>
+	return false;
+}
+
+if (isset($_POST['fetch_new']) && !$_POST['fetch_new']) {
+	die("Nothing to judge");
+}
+if (!findSubmissionToJudge()) {
+	die("Nothing to judge");
+}
+
+$submission['id'] = (int)$submission['id'];
+$submission['problem_id'] = (int)$submission['problem_id'];
+$submission['problem_mtime'] = filemtime("/var/uoj_data/{$submission['problem_id']}");
+$submission['content'] = json_decode($submission['content'], true);
+if (isset($submission['status']) && $submission['status'] == 'Judged, Judging' && isset($submission['content']['final_test_config'])) {
+	$submission['content']['config'] = $submission['content']['final_test_config'];
+	unset($submission['content']['final_test_config']);
+}
+
+if ($hack) {
+	$submission['is_hack'] = "";
+	$submission['hack']['id'] = (int)$hack['id'];
+	$submission['hack']['input'] = $hack['input'];
+	$submission['hack']['input_type'] = $hack['input_type'];
+}
+
+echo json_encode($submission);
--- a/web/app/controllers/judge/sync_judge_client.php
+++ b/web/app/controllers/judge/sync_judge_client.php
@ -1,21 +1,28 @@
 <?php
-	requirePHPLib('judger');
-	
-	if (!authenticateJudger()) {
-		become404Page();
+requirePHPLib('judger');
+requirePHPLib('data');
+
+if (!authenticateJudger()) {
+	UOJResponse::page404();
+}
+
+$res = DB::selectAll([
+	"select * from judger_info",
+	"where", [
+		["ip", "!=", ""],
+		"enabled" => true
+	]
+]);
+foreach ($res as $judger) {
+	$socket = fsockopen($judger['ip'], UOJConfig::$data['judger']['socket']['port']);
+	if ($socket === false) {
+		die("judge client {$judger['ip']} lost.");
 	}
-	
-	foreach (DB::selectAll("select * from judger_info where ip != ''") as $judger) {
-		$socket = fsockopen($judger['ip'], UOJConfig::$data['judger']['socket']['port']);
-		if ($socket === false) {
-			die("judge client {$judger['ip']} lost.");
-		}
-		fwrite($socket, json_encode([
-			'password' => UOJConfig::$data['judger']['socket']['password'],
-			'cmd' => 'update'
-		]));
-		fclose($socket);
-	}
-	
-	die("ok");
-	?>
+	fwrite($socket, json_encode([
+		'password' => UOJConfig::$data['judger']['socket']['password'],
+		'cmd' => 'update'
+	]));
+	fclose($socket);
+}
+
+die("ok");
--- a/web/app/controllers/list.php
+++ b/web/app/controllers/list.php
@ -1,12 +1,8 @@
 <?php
-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
+	if (!Auth::check()) {
 		redirectToLogin();
 	}

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
-
 	requireLib('bootstrap5');
 	requireLib('mathjax');
 	requirePHPLib('form');
@ -73,7 +69,7 @@ EOD;
 					echo "<td>{$extra_config['difficulty']}</td>";
 				}
 			}
-			echo '<td class="text-start">', getClickZanBlock('P', $problem['id'], $problem['zan'], null, false), '</td>';
+			echo '<td class="text-start">', ClickZans::getBlock('P', $problem['id'], $problem['zan'], null, false), '</td>';
 			echo '</tr>';
 		}
 	}
@ -121,7 +117,7 @@ EOD;
 <!-- title container -->
 <div class="d-flex justify-content-between">

-<h1 class="h2">
+<h1>
 	<?= $list['title'] ?>
 	<span class="fs-5">(ID: #<?= $list['id'] ?>)</span>
 	<?php if ($list['is_hidden']): ?>
@ -146,7 +142,7 @@ EOD;
 <!-- description -->
 <div class="card my-2">
 	<div class="card-body">
-		<h2 class="h5 mb-3">题单简介</h2>
+		<h2 class="h4 mb-3">题单简介</h2>
 		<?php $description = HTML::purifier()->purify(HTML::parsedown()->text($list['description'])) ?>
 		<?php if ($description): ?>
 			<?= $description ?>
@ -224,7 +220,7 @@ $('#input-show_difficulty').click(function() {
 </thead>
 <tbody>
 <?php foreach ($pag->get() as $idx => $row): ?>
-		<?php echoProblem($row) ?>
+	<?php echoProblem($row) ?>
 <?php endforeach ?>
 <?php if ($pag->isEmpty()): ?>
 	<tr>
--- a/web/app/controllers/list_edit.php
+++ b/web/app/controllers/list_edit.php
@ -44,7 +44,7 @@
 	if ($cur_tab == 'profile') {
 		$list_tags = queryProblemListTags($list_id);
 		
-		$update_profile_form = new UOJForm('update_profile');
+		$update_profile_form = new UOJBs4Form('update_profile');
 		$update_profile_form->addVInput('name', 'text', '标题', $list['title'],
 			function($title, &$vdata) {
 				if ($title == '') {
@ -151,7 +151,7 @@ function(res) {
 	$(window).scrollTop(0);
 }
 EOD);
-		$update_profile_form->submit_button_config['margin_class'] = 'mt-3';
+		$update_profile_form->submit_button_config['class_str'] = 'btn btn-secondary mt-3';
 		$update_profile_form->submit_button_config['text'] = '更新';
 		$update_profile_form->runAtServer();
 	} elseif ($cur_tab == 'problems') {
@ -179,7 +179,7 @@ EOD);

 		$n_problems = DB::selectCount("SELECT count(*) FROM `lists_problems` WHERE `list_id` = {$list['id']}");

-		$add_new_problem_form = new UOJForm('add_new_problem');
+		$add_new_problem_form = new UOJBs4Form('add_new_problem');
 		$add_new_problem_form->addVInput('problem_id', 'text', '题目 ID', '', 
 			function ($problem_id, &$vdata) use ($list) {
 				if (!validateUInt($problem_id)) {
@ -200,7 +200,7 @@ EOD);
 			},
 			null
 		);
-		$add_new_problem_form->submit_button_config['margin_class'] = 'mt-3';
+		$add_new_problem_form->submit_button_config['class_str'] = 'btn btn-secondary mt-3';
 		$add_new_problem_form->submit_button_config['text'] = '添加';
 		$add_new_problem_form->handle = function($vdata) use ($list) {
 			DB::insert("INSERT INTO `lists_problems` (`list_id`, `problem_id`) values ({$list['id']}, {$vdata['problem_id']})");
@ -250,7 +250,7 @@ EOD);
 			dieWithAlert('移除成功！');
 		}

-		$add_new_assignment_form = new UOJForm('add_new_assignment');
+		$add_new_assignment_form = new UOJBs4Form('add_new_assignment');
 		$add_new_assignment_form->addVInput('new_assignment_group_id', 'text', '小组 ID', '', 
 			function ($group_id, &$vdata) use ($list) {
 				if (!validateUInt($group_id)) {
@ -300,7 +300,7 @@ EOD);
 				'message' => '题单 #' . $list['id'] . ' 已经被添加到小组 #' . $vdata['group_id'] . ' 的作业列表中，结束时间为 ' . $vdata['end_time']->format('Y-m-d H:i:s') . '。'
 			]);
 		};
-		$add_new_assignment_form->submit_button_config['margin_class'] = 'mt-3';
+		$add_new_assignment_form->submit_button_config['class_str'] = 'btn btn-secondary mt-3';
 		$add_new_assignment_form->submit_button_config['text'] = '添加';
 		$add_new_assignment_form->setAjaxSubmit(<<<EOD
 function(res) {
@ -330,7 +330,7 @@ EOD);

 <?php echoUOJPageHeader('管理 - ' . $list['title']) ?>

-<h1 class="h2">
+<h1>
 	<?= $list['title'] ?>
 	<small class="fs-5">(ID: #<?= $list['id'] ?>)</small>
 	管理
--- a/web/app/controllers/lists.php
+++ b/web/app/controllers/lists.php
@ -1,19 +1,15 @@
 <?php
-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
+	if (!Auth::check()) {
 		redirectToLogin();
 	}

-	if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-		become403Page();
-	}
-
 	requireLib('bootstrap5');
 	requirePHPLib('form');
 	requirePHPLib('judger');
 	requirePHPLib('data');

 	if (isSuperUser($myUser)) {
-		$new_list_form = new UOJForm('new_list');
+		$new_list_form = new UOJBs4Form('new_list');
 		$new_list_form->handle = function() {
 			DB::query("insert into lists (title, is_hidden) values ('未命名题单', 1)");
 		};
@ -66,7 +62,7 @@
 <!-- title container -->
 <div class="d-flex justify-content-between">

-<h1 class="h2">
+<h1>
 	<?= UOJLocale::get('problems lists') ?>
 </h1>

@ -147,7 +143,6 @@ EOD;
 			'page_len' => 40,
 			'table_classes' => ['table', 'table-bordered', 'table-hover', 'table-striped'],
 			'head_pagination' => true,
-			'pagination_table' => 'lists',
 			'div_classes' => ['card', 'my-3'],
 			'table_classes' => ['table', 'uoj-table', 'mb-0'],
 		]
--- a/web/app/controllers/login.php
+++ b/web/app/controllers/login.php
@ -1,58 +1,57 @@
 <?php
-	use Gregwar\Captcha\PhraseBuilder;
-	use Gregwar\Captcha\CaptchaBuilder;
-	
-	requireLib('md5');
-	requireLib('bootstrap5');

-	if (Auth::check()) {
-		redirectTo('/');
+use Gregwar\Captcha\PhraseBuilder;
+
+requireLib('md5');
+requireLib('bootstrap5');
+
+Auth::check() && redirectTo('/');
+
+function handleLoginPost() {
+	if (!crsf_check()) {
+		return 'expired';
+	}
+	if (!isset($_POST['username'])) {
+		return "failed";
+	}
+	if (!isset($_POST['password'])) {
+		return "failed";
+	}
+	$username = $_POST['username'];
+	$password = $_POST['password'];
+	$captcha = $_POST['captcha'];
+
+	if (!isset($_SESSION['phrase']) || !PhraseBuilder::comparePhrases($_SESSION['phrase'], $captcha)) {
+		return "bad_captcha";
 	}

-	function handleLoginPost() {
-		if (!crsf_check()) {
-			return 'expired';
-		}
-		if (!isset($_POST['username'])) {
-			return "failed";
-		}
-		if (!isset($_POST['password'])) {
-			return "failed";
-		}
-		$username = $_POST['username'];
-		$password = $_POST['password'];
-		$captcha = $_POST['captcha'];
+	if (!validateUsername($username)) {
+		return "failed";
+	}
+	if (!validatePassword($password)) {
+		return "failed";
+	}

-		if (!isset($_SESSION['phrase']) || !PhraseBuilder::comparePhrases($_SESSION['phrase'], $captcha)) {
-			return "bad_captcha";
-		}
-		
-		if (!validateUsername($username)) {
-			return "failed";
-		}
-		if (!validatePassword($password)) {
-			return "failed";
-		}
-		
-		$user = queryUser($username);
-		if (!$user || !checkPassword($user, $password)) {
-			return "failed";
-		}
-		
-		if ($user['usergroup'] == 'B') {
-			return "banned";
-		}
-		
-		Auth::login($user['username']);
-		return "ok";
+	$user = UOJUser::query($username);
+	if (!$user || !checkPassword($user, $password)) {
+		return "failed";
 	}
-	
-	if (isset($_POST['login'])) {
-		echo handleLoginPost();
-		unset($_SESSION['phrase']);
-		die();
+
+	$account_status = UOJUser::getAccountStatus($user);
+	if ($account_status != 'ok') {
+		return 'account:' . $account_status;
 	}
-	?>
+
+	Auth::login($user['username']);
+	return "ok";
+}
+
+if (isset($_POST['login'])) {
+	echo handleLoginPost();
+	unset($_SESSION['phrase']);
+	die();
+}
+?>
 <?php echoUOJPageHeader(UOJLocale::get('login')) ?>

 <style>
@ -107,79 +106,78 @@
 </main>

 <script type="text/javascript">
-function validateLoginPost() {
-	var ok = true;
-	ok &= getFormErrorAndShowHelp('username', validateUsername);
-	ok &= getFormErrorAndShowHelp('password', validatePassword);
-	return ok;
-}
-
-function refreshCaptcha() {
-	var timestamp = new Date().getTime();
-	$("#captcha").attr("src", "/captcha" + '?' + timestamp);
-}
-
-function submitLoginPost() {
-	if (!validateLoginPost()) {
-		return false;
+	function validateLoginPost() {
+		var ok = true;
+		ok &= getFormErrorAndShowHelp('username', validateUsername);
+		ok &= getFormErrorAndShowHelp('password', validatePassword);
+		return ok;
 	}
-	
-	$.post('/login', {
-		_token : "<?= crsf_token() ?>",
-		login : '',
-		username : $('#input-username').val(),
-		password : md5($('#input-password').val(), "<?= getPasswordClientSalt() ?>"),
-		captcha: $('#input-captcha').val(),
-	}, function(msg) {
-		$('#div-username, #div-password, #div-captcha').removeClass('has-validation');
-		$('#input-username, #input-password, #input-captcha').removeClass('is-invalid');
-		$('#help-username, #help-passwor, #help-captcha').html('');

-		if (msg == 'ok') {
-			var prevUrl = document.referrer;
-			if (prevUrl == '' || /.*\/login.*/.test(prevUrl) || /.*\/logout.*/.test(prevUrl) || /.*\/register.*/.test(prevUrl) || /.*\/reset-password.*/.test(prevUrl)) {
-				prevUrl = '/';
-			};
-			window.location.href = prevUrl;
-		} else if (msg == 'bad_captcha') {
-			$('#div-captcha').addClass('has-validation');
-			$('#div-captcha > .form-floating, #input-captcha').addClass('is-invalid');
-			$('#help-captcha').html('验证码错误。');
-			refreshCaptcha();
-		} else if (msg == 'banned') {
-			$('#div-username').addClass('has-validation');
-			$('#div-username > .form-floating, #input-username').addClass('is-invalid');
-			$('#help-username').html('该用户已被封停，请联系管理员。');
-			refreshCaptcha();
-		} else if (msg == 'expired') {
-			$('#div-username').addClass('has-validation');
-			$('#div-username > .form-floating, #input-username').addClass('is-invalid');
-			$('#help-username').html('页面会话已过期。');
-			refreshCaptcha();
-		} else {
-			$('#div-username').addClass('has-validation');
-			$('#div-username > .form-floating, #input-username').addClass('is-invalid');
-			$('#div-password').addClass('has-validation');
-			$('#div-password > .form-floating, #input-password').addClass('is-invalid');
-			$('#help-password').html('用户名或密码错误。<a href="/forgot-password">忘记密码？</a>');
-			refreshCaptcha();
+	function refreshCaptcha() {
+		var timestamp = new Date().getTime();
+		$("#captcha").attr("src", "/captcha" + '?' + timestamp);
+	}
+
+	function submitLoginPost() {
+		if (!validateLoginPost()) {
+			return false;
 		}
-	});
-	return true;
-}

-$(document).ready(function() {
-	refreshCaptcha();
+		$.post('/login', {
+			_token: "<?= crsf_token() ?>",
+			login: '',
+			username: $('#input-username').val(),
+			password: md5($('#input-password').val(), "<?= getPasswordClientSalt() ?>"),
+			captcha: $('#input-captcha').val(),
+		}, function(msg) {
+			$('#div-username, #div-password, #div-captcha').removeClass('has-validation');
+			$('#input-username, #input-password, #input-captcha').removeClass('is-invalid');
+			$('#help-username, #help-passwor, #help-captcha').html('');

-	$('#form-login').submit(function(e) {
-		e.preventDefault();
-		submitLoginPost();
-	});
-	$("#captcha").click(function(e) {
+			if (msg == 'ok') {
+				var prevUrl = document.referrer;
+				if (prevUrl == '' || /.*\/login.*/.test(prevUrl) || /.*\/logout.*/.test(prevUrl) || /.*\/register.*/.test(prevUrl) || /.*\/reset-password.*/.test(prevUrl)) {
+					prevUrl = '/';
+				};
+				window.location.href = prevUrl;
+			} else if (msg == 'bad_captcha') {
+				$('#div-captcha').addClass('has-validation');
+				$('#div-captcha > .form-floating, #input-captcha').addClass('is-invalid');
+				$('#help-captcha').html('验证码错误。');
+				refreshCaptcha();
+			} else if (msg == 'banned') {
+				$('#div-username').addClass('has-validation');
+				$('#div-username > .form-floating, #input-username').addClass('is-invalid');
+				$('#help-username').html('该用户已被封停，请联系管理员。');
+				refreshCaptcha();
+			} else if (msg == 'expired') {
+				$('#div-username').addClass('has-validation');
+				$('#div-username > .form-floating, #input-username').addClass('is-invalid');
+				$('#help-username').html('页面会话已过期。');
+				refreshCaptcha();
+			} else {
+				$('#div-username').addClass('has-validation');
+				$('#div-username > .form-floating, #input-username').addClass('is-invalid');
+				$('#div-password').addClass('has-validation');
+				$('#div-password > .form-floating, #input-password').addClass('is-invalid');
+				$('#help-password').html('用户名或密码错误。<a href="/forgot-password">忘记密码？</a>');
+				refreshCaptcha();
+			}
+		});
+		return true;
+	}
+
+	$(document).ready(function() {
 		refreshCaptcha();
-	});
-});

+		$('#form-login').submit(function(e) {
+			e.preventDefault();
+			submitLoginPost();
+		});
+		$("#captcha").click(function(e) {
+			refreshCaptcha();
+		});
+	});
 </script>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/logout.php
+++ b/web/app/controllers/logout.php
@ -1,12 +1,12 @@
 <?php
-	crsf_defend();
-	Auth::logout();
-	?>
+crsf_defend();
+Auth::logout();
+?>

 <script type="text/javascript">
-var prevUrl = document.referrer;
-if (!prevUrl) {
-  prevUrl = '/';
-};
-window.location.href = prevUrl;
+	var prevUrl = document.referrer;
+	if (!prevUrl) {
+		prevUrl = '/';
+	};
+	window.location.href = prevUrl;
 </script>
--- a/web/app/controllers/problem.php
+++ b/web/app/controllers/problem.php
@ -1,482 +1,431 @@
 <?php
-	requireLib('bootstrap5');
-	requireLib('hljs');
-	requireLib('mathjax');
-	requirePHPLib('form');
-	requirePHPLib('judger');	
+requireLib('bootstrap5');
+requireLib('hljs');
+requireLib('mathjax');
+requirePHPLib('form');
+requirePHPLib('judger');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+Auth::check() || redirectToLogin();
+UOJProblem::init(UOJRequest::get('id')) || UOJResponse::page404();

-	if (!validateUInt($_GET['id']) || !($problem = queryProblemBrief($_GET['id']))) {
-		become404Page();
-	}
+$problem = UOJProblem::cur()->info;
+$problem_content = UOJProblem::cur()->queryContent();

-	$problem_content = queryProblemContent($problem['id']);
-	
-	$contest = validateUInt($_GET['contest_id']) ? queryContest($_GET['contest_id']) : null;
-	if ($contest != null) {
-		genMoreContestInfo($contest);
-		$problem_rank = queryContestProblemRank($contest, $problem);
-		if ($problem_rank == null) {
-			become404Page();
-		} else {
-			$problem_letter = chr(ord('A') + $problem_rank - 1);
+if (UOJRequest::get('contest_id')) {
+	UOJContest::init(UOJRequest::get('contest_id')) || UOJResponse::page404();
+	UOJProblem::upgradeToContestProblem() || UOJResponse::page404();
+}
+UOJProblem::cur()->userCanView(Auth::user(), ['ensure' => true]);
+
+$pre_submit_check_ret = UOJProblem::cur()->preSubmitCheck();
+
+$is_participating = false;
+$no_more_submission = false;
+$submission_warning = null;
+if (UOJContest::cur()) {
+	if (UOJContest::cur()->userCanParticipateNow(Auth::user())) {
+		if (!UOJContest::cur()->userHasMarkedParticipated(Auth::user())) {
+			redirectTo(UOJContest::cur()->getUri("/confirm"));
 		}
-	}
-	
-	$is_in_contest = false;
-	$ban_in_contest = false;
-	if ($contest != null) {
-		if (!hasContestPermission($myUser, $contest)) {
-			if ($contest['cur_progress'] == CONTEST_NOT_STARTED) {
-				become404Page();
-			} elseif ($contest['cur_progress'] == CONTEST_IN_PROGRESS) {
-				if (Auth::check()) {
-					if (hasParticipated($myUser, $contest)) {
-						$is_in_contest = true;
-					} else {
-						redirectTo("/contest/{$contest['id']}/confirm");
-					}
-				} else {
-					redirectToLogin();
+		$is_participating = true;
+		$submit_time_limit = UOJContestProblem::cur()->submitTimeLimit();
+		$max_cnt = UOJContest::cur()->maxSubmissionCountPerProblem();
+		if ($submit_time_limit != -1) {
+			$cur_contest_time = (UOJTime::$time_now->getTimestamp() - UOJContest::info('start_time')->getTimestamp()) / 60;
+			if ($cur_contest_time > $submit_time_limit) {
+				$no_more_submission = "本题只能在比赛的前 {$submit_time_limit} 分钟提交，没法再交咯";
+			}
+		}
+		if (!$no_more_submission) {
+			if ($max_cnt != -1) {
+				$cnt = UOJContestProblem::cur()->queryUserSubmissionCountInContest(Auth::user());
+				if ($cnt >= $max_cnt) {
+					$no_more_submission = "提交次数已达到 {$cnt} 次，没法再交咯";
 				}
+			}
+		}
+		if (!$no_more_submission) {
+			if ($max_cnt != -1) {
+				$warning1 = "已使用 {$cnt}/{$max_cnt} 次提交机会";
 			} else {
-				$ban_in_contest = !isProblemVisibleToUser($problem, $myUser);
-
-				if (!hasRegistered($myUser, $contest) && !isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-					become403Page();
-				}
+				$warning1 = null;
 			}
-		} else {
-			if ($contest['cur_progress'] == CONTEST_IN_PROGRESS) {
-				if (hasRegistered($myUser, $contest)) {
-					if (hasParticipated($myUser, $contest)) {
-						$is_in_contest = true;
-					} else {
-						redirectTo("/contest/{$contest['id']}/confirm");
-					}
-				}
+			if ($submit_time_limit != -1) {
+				$warning2 = "注意本题只能在比赛的前 {$submit_time_limit} 分钟提交";
+			} else {
+				$warning2 = null;
+			}
+			if ($warning1 && $warning2) {
+				$submission_warning = "{$warning1}（{$warning2}）";
+			} else {
+				$submission_warning = $warning1 !== null ? $warning1 : $warning2;
 			}
-		}
-	} else {
-		if (!isProblemVisibleToUser($problem, $myUser)) {
-			become404Page();
-		}
-
-		if (!isNormalUser($myUser) && UOJConfig::$data['switch']['force-login']) {
-			become403Page();
 		}
 	}

-	$submission_requirement = json_decode($problem['submission_requirement'], true);
-	$problem_extra_config = getProblemExtraConfig($problem);
-	$custom_test_requirement = getProblemCustomTestRequirement($problem);
+	// 比赛导航
+	$tabs_info = [
+		'dashboard' => [
+			'name' => UOJLocale::get('contests::contest dashboard'),
+			'url' => '/contest/' . UOJContest::info('id'),
+		],
+		'submissions' => [
+			'name' => UOJLocale::get('contests::contest submissions'),
+			'url' => '/contest/' . UOJContest::info('id') . '/submissions',
+		],
+		'standings' => [
+			'name' => UOJLocale::get('contests::contest standings'),
+			'url' => '/contest/' . UOJContest::info('id') . '/standings',
+		],
+	];

-	if ($custom_test_requirement && Auth::check()) {
-		$custom_test_submission = DB::selectFirst("select * from custom_test_submissions where submitter = '".Auth::id()."' and problem_id = {$problem['id']} order by id desc limit 1");
-		$custom_test_submission_result = json_decode($custom_test_submission['result'], true);
+	if (UOJContest::cur()->progress() > CONTEST_TESTING) {
+		$tabs_info['after_contest_standings'] = [
+			'name' => UOJLocale::get('contests::after contest standings'),
+			'url' => '/contest/' . UOJContest::info('id') . '/after_contest_standings',
+		];
+		$tabs_info['self_reviews'] = [
+			'name' => UOJLocale::get('contests::contest self reviews'),
+			'url' => '/contest/' . UOJContest::info('id') . '/self_reviews',
+		];
 	}
-	if ($custom_test_requirement && $_GET['get'] == 'custom-test-status-details' && Auth::check()) {
-		if ($custom_test_submission == null) {
+
+	if (UOJContest::cur()->userCanManage(Auth::user())) {
+		$tabs_info['backstage'] = [
+			'name' => UOJLocale::get('contests::contest backstage'),
+			'url' => '/contest/' . UOJContest::info('id') . '/backstage',
+		];
+	}
+}
+
+$submission_requirement = UOJProblem::cur()->getSubmissionRequirement();
+$custom_test_requirement = UOJProblem::cur()->getCustomTestRequirement();
+$custom_test_enabled = $custom_test_requirement && $pre_submit_check_ret === true;
+
+function handleUpload($zip_file_name, $content, $tot_size) {
+	global $is_participating;
+	UOJSubmission::onUpload($zip_file_name, $content, $tot_size, $is_participating);
+}
+function handleCustomTestUpload($zip_file_name, $content, $tot_size) {
+	UOJCustomTestSubmission::onUpload($zip_file_name, $content, $tot_size);
+}
+if ($custom_test_enabled) {
+	UOJCustomTestSubmission::init(UOJProblem::cur(), Auth::user());
+
+	if (UOJRequest::get('get') == 'custom-test-status-details') {
+		if (!UOJCustomTestSubmission::cur()) {
 			echo json_encode(null);
-		} elseif ($custom_test_submission['status'] != 'Judged') {
-			echo json_encode(array(
+		} elseif (!UOJCustomTestSubmission::cur()->hasJudged()) {
+			echo json_encode([
 				'judged' => false,
-				'html' => getSubmissionStatusDetails($custom_test_submission)
-			));
+				'waiting' => true,
+				'html' => UOJCustomTestSubmission::cur()->getStatusDetailsHTML(),
+			]);
 		} else {
 			ob_start();
 			$styler = new CustomTestSubmissionDetailsStyler();
-			if (!hasViewPermission($problem_extra_config['view_details_type'], $myUser, $problem, $submission)) {
+			if (!UOJCustomTestSubmission::cur()->userPermissionCodeCheck(Auth::user(), UOJProblem::cur()->getExtraConfig('view_details_type'))) {
 				$styler->fade_all_details = true;
 			}
-			echoJudgementDetails($custom_test_submission_result['details'], $styler, 'custom_test_details');
+			echoJudgmentDetails(UOJCustomTestSubmission::cur()->getResult('details'), $styler, 'custom_test_details');
 			$result = ob_get_contents();
 			ob_end_clean();
-			echo json_encode(array(
+			echo json_encode([
 				'judged' => true,
-				'html' => getSubmissionStatusDetails($custom_test_submission),
+				'waiting' => false,
+				'html' => UOJCustomTestSubmission::cur()->getStatusDetailsHTML(),
 				'result' => $result
-			));
+			]);
 		}
 		die();
 	}
-	
-	$can_use_zip_upload = true;
-	foreach ($submission_requirement as $req) {
-		if ($req['type'] == 'source code') {
-			$can_use_zip_upload = false;
-		}
-	}
-	
-	function handleUpload($zip_file_name, $content, $tot_size) {
-		global $problem, $contest, $myUser, $is_in_contest;
-		
-		$content['config'][] = array('problem_id', $problem['id']);
-		if ($is_in_contest && $contest['extra_config']["contest_type"]!='IOI' && !isset($contest['extra_config']["problem_{$problem['id']}"])) {
-			$content['final_test_config'] = $content['config'];
-			$content['config'][] = array('test_sample_only', 'on');
-		}
-		$esc_content = DB::escape(json_encode($content));

-		$language = '/';
-		foreach ($content['config'] as $row) {
-			if (strEndWith($row[0], '_language')) {
-				$language = $row[1];
-				break;
-			}
-		}
-		if ($language != '/') {
-			Cookie::set('uoj_preferred_language', $language, time() + 60 * 60 * 24 * 365, '/');
-		}
-		$esc_language = DB::escape($language);
- 		
-		$result = array();
-		$result['status'] = "Waiting";
-		$result_json = json_encode($result);
-		
-		if ($is_in_contest) {
-			DB::query("insert into submissions (problem_id, contest_id, submit_time, submitter, content, language, tot_size, status, result, is_hidden) values (${problem['id']}, ${contest['id']}, now(), '${myUser['username']}', '$esc_content', '$esc_language', $tot_size, '${result['status']}', '$result_json', 0)");
-		} else {
-			DB::query("insert into submissions (problem_id, submit_time, submitter, content, language, tot_size, status, result, is_hidden) values (${problem['id']}, now(), '${myUser['username']}', '$esc_content', '$esc_language', $tot_size, '${result['status']}', '$result_json', {$problem['is_hidden']})");
-		}
-	}
-	function handleCustomTestUpload($zip_file_name, $content, $tot_size) {
-		global $problem, $contest, $myUser;
-		
-		$content['config'][] = array('problem_id', $problem['id']);
-		$content['config'][] = array('custom_test', 'on');
-		$esc_content = DB::escape(json_encode($content));
-
-		$language = '/';
-		foreach ($content['config'] as $row) {
-			if (strEndWith($row[0], '_language')) {
-				$language = $row[1];
-				break;
-			}
-		}
-		if ($language != '/') {
-			Cookie::set('uoj_preferred_language', $language, time() + 60 * 60 * 24 * 365, '/');
-		}
-		$esc_language = DB::escape($language);
- 		
-		$result = array();
-		$result['status'] = "Waiting";
-		$result_json = json_encode($result);
-		
-		DB::insert("insert into custom_test_submissions (problem_id, submit_time, submitter, content, status, result) values ({$problem['id']}, now(), '{$myUser['username']}', '$esc_content', '{$result['status']}', '$result_json')");
-	}
-	
-	if ($can_use_zip_upload) {
-		$zip_answer_form = newZipSubmissionForm('zip_answer',
-			$submission_requirement,
-			'uojRandAvaiableSubmissionFileName',
-			'handleUpload');
-		$zip_answer_form->extra_validator = function() {
-			global $ban_in_contest;
-			if ($ban_in_contest) {
-				return '请耐心等待比赛结束后题目对所有人可见了再提交';
-			}
-			return '';
-		};
-		$zip_answer_form->succ_href = $is_in_contest ? "/contest/{$contest['id']}/submissions" : '/submissions';
-		$zip_answer_form->runAtServer();
-	}
-	
-	$answer_form = newSubmissionForm('answer',
-		$submission_requirement,
-		'uojRandAvaiableSubmissionFileName',
-		'handleUpload');
-	$answer_form->extra_validator = function() {
-		global $ban_in_contest;
-		if ($ban_in_contest) {
-			return '请耐心等待比赛结束后题目对所有人可见了再提交';
+	$custom_test_form = newSubmissionForm(
+		'custom_test',
+		$custom_test_requirement,
+		'FS::randomAvailableTmpFileName',
+		'handleCustomTestUpload'
+	);
+	$custom_test_form->appendHTML('<div id="div-custom_test_result"></div>');
+	$custom_test_form->succ_href = 'none';
+	$custom_test_form->extra_validator = function () {
+		if (UOJCustomTestSubmission::cur() && !UOJCustomTestSubmission::cur()->hasJudged()) {
+			return '上一个测评尚未结束';
 		}
 		return '';
 	};
-	$answer_form->succ_href = $is_in_contest ? "/contest/{$contest['id']}/submissions" : '/submissions';
-	$answer_form->runAtServer();
+	$custom_test_form->ctrl_enter_submit = true;
+	$custom_test_form->setAjaxSubmit(
+		<<<EOD
+		function(response_text) {
+			custom_test_onsubmit(
+				response_text,
+				$('#div-custom_test_result')[0],
+				'{$_SERVER['REQUEST_URI']}?get=custom-test-status-details'
+			)
+		}
+		EOD
+	);
+	$custom_test_form->submit_button_config['text'] = UOJLocale::get('problems::run');
+	$custom_test_form->runAtServer();
+}

-	if ($custom_test_requirement) {
-		$custom_test_form = newSubmissionForm('custom_test',
-			$custom_test_requirement,
-			function() {
-				return uojRandAvaiableFileName('/tmp/');
-			},
-			'handleCustomTestUpload');
-		$custom_test_form->appendHTML(<<<EOD
-<div id="div-custom_test_result"></div>
-EOD
-		);
-		$custom_test_form->succ_href = 'none';
-		$custom_test_form->extra_validator = function() {
-			global $ban_in_contest, $custom_test_submission;
-			if ($ban_in_contest) {
-				return '请耐心等待比赛结束后题目对所有人可见了再提交';
-			}
-			if ($custom_test_submission && $custom_test_submission['status'] != 'Judged') {
-				return '上一个测评尚未结束';
-			}
-			return '';
-		};
-		$custom_test_form->ctrl_enter_submit = true;
-		$custom_test_form->setAjaxSubmit(<<<EOD
-function(response_text) {custom_test_onsubmit(response_text, $('#div-custom_test_result')[0], '{$_SERVER['REQUEST_URI']}?get=custom-test-status-details')}
-EOD
-		);
-		$custom_test_form->submit_button_config['text'] = UOJLocale::get('problems::run');
-		$custom_test_form->runAtServer();
+$can_use_zip_upload = true;
+foreach ($submission_requirement as $req) {
+	if ($req['type'] == 'source code') {
+		$can_use_zip_upload = false;
 	}
-	?>
+}
+
+if ($pre_submit_check_ret === true && !$no_more_submission) {
+	$submission_extra_validator = function () {
+		if (!submission_frequency_check()) {
+			UOJLog::warning('a user exceeds the submission frequency limit! ' . Auth::id() . ' at problem #' . UOJProblem::info('id'));
+			return '交题交得太快啦，坐下来喝杯阿华田休息下吧？';
+		}
+		return '';
+	};
+
+	if (UOJProblem::cur()->userCanUploadSubmissionViaZip(Auth::user())) {
+		$zip_answer_form = newZipSubmissionForm(
+			'zip-answer',
+			$submission_requirement,
+			'FS::randomAvailableSubmissionFileName',
+			'handleUpload'
+		);
+		$zip_answer_form->extra_validators[] = $submission_extra_validator;
+		$zip_answer_form->succ_href = $is_participating ? '/contest/' . UOJContest::info('id') . '/submissions' : '/submissions';
+		$zip_answer_form->runAtServer();
+	}
+
+	$answer_form = newSubmissionForm(
+		'answer',
+		$submission_requirement,
+		'FS::randomAvailableSubmissionFileName',
+		'handleUpload'
+	);
+	$answer_form->extra_validator = $submission_extra_validator;
+	$answer_form->succ_href = $is_participating ? '/contest/' . UOJContest::info('id') . '/submissions' : '/submissions';
+	$answer_form->runAtServer();
+}
+
+$conf = UOJProblem::cur()->getProblemConf();
+?>

 <?php echoUOJPageHeader(HTML::stripTags($problem['title']) . ' - ' . UOJLocale::get('problems::problem')) ?>
-<?php
-	$limit = getUOJConf("/var/uoj_data/{$problem['id']}/problem.conf");
-	$time_limit = $limit['time_limit'];
-	$memory_limit = $limit['memory_limit'];
-
-	$problem_uploader = $problem['uploader'];
-	?>

 <div class="row">
+	<!-- Left col -->
+	<div class="col-lg-9">

-<!-- Left col -->
-<div class="col-lg-9">
-
-<?php if ($contest): ?>
-<!-- 比赛导航 -->
-<?php
-	$tabs_info = array(
-		'dashboard' => array(
-			'name' => UOJLocale::get('contests::contest dashboard'),
-			'url' => "/contest/{$contest['id']}"
-		),
-		'submissions' => array(
-			'name' => UOJLocale::get('contests::contest submissions'),
-			'url' => "/contest/{$contest['id']}/submissions"
-		),
-		'standings' => array(
-			'name' => UOJLocale::get('contests::contest standings'),
-			'url' => "/contest/{$contest['id']}/standings"
-		),
-	);
-
-	if ($contest['cur_progress'] > CONTEST_TESTING) {
-		$tabs_info['after_contest_standings'] = array(
-			'name' => UOJLocale::get('contests::after contest standings'),
-			'url' => "/contest/{$contest['id']}/after_contest_standings"
-		);
-		$tabs_info['self_reviews'] = array(
-			'name' => UOJLocale::get('contests::contest self reviews'),
-			'url' => "/contest/{$contest['id']}/self_reviews"
-		);
-	}
-
-	if (hasContestPermission(Auth::user(), $contest)) {
-		$tabs_info['backstage'] = array(
-			'name' => UOJLocale::get('contests::contest backstage'),
-			'url' => "/contest/{$contest['id']}/backstage"
-		);
-	}
-	?>
-	<div class="mb-2">
-		<?= HTML::tablist($tabs_info, '', 'nav-pills') ?>
-	</div>
-<?php endif ?>
-
-<div class="card card-default mb-2">
-<div class="card-body">
-
-<h1 class="h2 card-title text-center">
-<?php if ($contest): ?>
-	<?= $problem_letter ?>. <?= $problem['title'] ?>
-<?php else: ?>
-	#<?= $problem['id']?>. <?= $problem['title'] ?>
-<?php endif ?>
-</h1>
-
-<div class="text-center small">
-	时间限制: <?= $time_limit != null ? "$time_limit s" : "N/A" ?>
-	&emsp;
-	空间限制: <?= $memory_limit != null ? "$memory_limit MB" : "N/A" ?>
-	&emsp;
-	上传者: <?= getUserLink($problem_uploader ?: "root") ?>
-</div>
-
-<hr>
-
-<div class="tab-content">
-	<div class="tab-pane active" id="statement">
-		<article class="mt-3 markdown-body">
-			<?= $problem_content['statement'] ?>
-		</article>
-	</div>
-	<div class="tab-pane" id="submit">
-		<div class="top-buffer-sm"></div>
-		<?php if ($can_use_zip_upload): ?>
-		<?php $zip_answer_form->printHTML(); ?>
-		<hr />
-		<strong><?= UOJLocale::get('problems::or upload files one by one') ?><br /></strong>
+		<?php if (isset($tabs_info)) : ?>
+			<!-- 比赛导航 -->
+			<div class="mb-2">
+				<?= HTML::tablist($tabs_info, '', 'nav-pills') ?>
+			</div>
 		<?php endif ?>
-		<?php $answer_form->printHTML(); ?>
-	</div>
-	<?php if ($custom_test_requirement): ?>
-	<div class="tab-pane" id="custom-test">
-		<div class="top-buffer-sm"></div>
-		<?php $custom_test_form->printHTML(); ?>
-	</div>
-	<?php endif ?>
-</div>

-</div>
-</div>
+		<div class="card card-default mb-2">
+			<div class="card-body">

-</div>
-<!-- End left col -->
+				<h1 class="card-title text-center">
+					<?php if (UOJContest::cur()) : ?>
+						<?= UOJProblem::cur()->getTitle(['with' => 'letter', 'simplify' => true]) ?>
+					<?php else : ?>
+						<?= UOJProblem::cur()->getTitle(['with' => 'id']) ?>
+					<?php endif ?>
+				</h1>

-<aside class="col-lg-3 mt-3 mt-lg-0">
-<!-- Right col -->
+				<?php
+				$time_limit = $conf instanceof UOJProblemConf ? $conf->getVal('time_limit', null) : null;
+				$memory_limit = $conf instanceof UOJProblemConf ? $conf->getVal('memory_limit', null) : null;
+				?>
+				<div class="text-center small">
+					时间限制: <?= $time_limit ? "$time_limit s" : "N/A" ?>
+					&emsp;
+					空间限制: <?= $memory_limit ? "$memory_limit MB" : "N/A" ?>
+					&emsp;
+					上传者: <?= UOJProblem::cur()->getUploaderLink() ?>
+				</div>

-<?php if ($contest): ?>
-<!-- Contest card -->
-<div class="card card-default mb-2">
-	<div class="card-body">
-		<h3 class="h5 card-title text-center">
-			<a class="text-decoration-none text-body" href="/contest/<?= $contest['id'] ?>">
-				<?= $contest['name'] ?>
-			</a>
-		</h3>
-		<div class="card-text text-center text-muted">
-			<?php if ($contest['cur_progress'] <= CONTEST_IN_PROGRESS): ?>
-				<span id="contest-countdown"></span>
-			<?php else: ?>
-				<?= UOJLocale::get('contests::contest ended') ?>
-			<?php endif ?>
+				<hr>
+
+				<div class="tab-content">
+					<div class="tab-pane active" id="statement">
+						<article class="mt-3 markdown-body">
+							<?= $problem_content['statement'] ?>
+						</article>
+					</div>
+					<div class="tab-pane" id="submit">
+						<?php if ($pre_submit_check_ret !== true) : ?>
+							<h3 class="text-warning"><?= $pre_submit_check_ret ?></h3>
+						<?php elseif ($no_more_submission) : ?>
+							<h3 class="text-warning"><?= $no_more_submission ?></h3>
+						<?php else : ?>
+							<?php if ($submission_warning) : ?>
+								<h3 class="text-warning"><?= $submission_warning ?></h3>
+							<?php endif ?>
+							<?php if (isset($zip_answer_form)) : ?>
+								<?php $zip_answer_form->printHTML(); ?>
+								<hr />
+								<strong><?= UOJLocale::get('problems::or upload files one by one') ?><br /></strong>
+							<?php endif ?>
+							<?php $answer_form->printHTML(); ?>
+						<?php endif ?>
+					</div>
+					<?php if ($custom_test_enabled) : ?>
+						<div class="tab-pane" id="custom-test">
+							<?php $custom_test_form->printHTML(); ?>
+						</div>
+					<?php endif ?>
+				</div>
+
+			</div>
 		</div>
-	</div>
-	<div class="card-footer bg-transparent">
-		比赛评价：<?= getClickZanBlock('C', $contest['id'], $contest['zan']) ?>
-	</div>
-</div>
-<?php if ($contest['cur_progress'] <= CONTEST_IN_PROGRESS): ?>
-<script type="text/javascript">
-$('#contest-countdown').countdown(<?= $contest['end_time']->getTimestamp() - UOJTime::$time_now->getTimestamp() ?>, function(){}, '1.75rem', false);
-</script>
-<?php endif ?>
-<?php endif ?>

-<!-- 题目导航卡片 -->
-<div class="card card-default mb-2">
-	<ul class="nav nav-pills nav-fill flex-column" role="tablist">
-		<li class="nav-item text-start">
-			<a href="#statement" class="nav-link active" role="tab" data-bs-toggle="pill" data-bs-target="#statement">
-				<i class="bi bi-journal-text"></i>
-				<?= UOJLocale::get('problems::statement') ?>
-			</a>
-		</li>
-		<li class="nav-item text-start">
-			<a href="#submit" class="nav-link" role="tab" data-bs-toggle="pill" data-bs-target="#submit">
-				<i class="bi bi-upload"></i>
-				<?= UOJLocale::get('problems::submit') ?>
-			</a>
-		</li>
-		<?php if ($custom_test_requirement): ?>
-		<li class="nav-item text-start">
-			<a class="nav-link" href="#custom-test" role="tab" data-bs-toggle="pill" data-bs-target="#custom-test">
-				<i class="bi bi-braces"></i>
-				<?= UOJLocale::get('problems::custom test') ?>
-			</a>
-		</li>
-		<?php endif ?>
-		<?php if (!$contest || $contest['cur_progress'] >= CONTEST_FINISHED): ?>
-		<li class="nav-item text-start">
-			<a href="/problem/<?= $problem['id'] ?>/solutions" class="nav-link" role="tab">
-				<i class="bi bi-journal-bookmark"></i>
-				<?= UOJLocale::get('problems::solutions') ?>
-			</a>
-		</li>
-		<?php endif ?>
-		<li class="nav-item text-start">
-			<a class="nav-link"
-			<?php if ($contest): ?>
-				href="/contest/<?= $contest['id'] ?>/problem/<?= $problem['id'] ?>/statistics"
-			<?php else: ?>
-				href="/problem/<?= $problem['id'] ?>/statistics"
+	</div>
+	<!-- End left col -->
+
+	<aside class="col-lg-3 mt-3 mt-lg-0">
+		<!-- Right col -->
+
+		<?php if (UOJContest::cur()) : ?>
+			<!-- Contest card -->
+			<div class="card card-default mb-2">
+				<div class="card-body">
+					<h3 class="h4 card-title text-center">
+						<a class="text-decoration-none text-body" href="/contest/<?= UOJContest::info('id') ?>">
+							<?= UOJContest::info('name') ?>
+						</a>
+					</h3>
+					<div class="card-text text-center text-muted">
+						<?php if (UOJContest::cur()->progress() <= CONTEST_IN_PROGRESS) : ?>
+							<span id="contest-countdown"></span>
+						<?php else : ?>
+							<?= UOJLocale::get('contests::contest ended') ?>
+						<?php endif ?>
+					</div>
+				</div>
+				<div class="card-footer bg-transparent">
+					比赛评价：<?= ClickZans::getBlock('C', UOJContest::info('id'), UOJContest::info('zan')) ?>
+				</div>
+			</div>
+			<?php if (UOJContest::cur()->progress() <= CONTEST_IN_PROGRESS) : ?>
+				<script>
+					$('#contest-countdown').countdown(<?= UOJContest::info('end_time')->getTimestamp() - UOJTime::$time_now->getTimestamp() ?>, function() {}, '1.75rem', false);
+				</script>
 			<?php endif ?>
-			>
-				<i class="bi bi-graph-up"></i>
-				<?= UOJLocale::get('problems::statistics') ?>
-			</a>
-		</li>
-		<?php if (hasProblemPermission($myUser, $problem)): ?>
-		<li class="nav-item text-start">
-			<a class="nav-link" href="/problem/<?= $problem['id'] ?>/manage/statement" role="tab">
-				<i class="bi bi-sliders"></i>
-				<?= UOJLocale::get('problems::manage') ?>
-			</a>
-		</li>
 		<?php endif ?>
-	</ul>
-	<div class="card-footer bg-transparent">
-		评价：<?= getClickZanBlock('P', $problem['id'], $problem['zan']) ?>
-	</div>
-</div>

-<!-- 附件 -->
-<div class="card card-default mb-2">
-	<ul class="nav nav-fill flex-column">
-		<li class="nav-item text-start">
-			<a class="nav-link" href="<?= HTML::url("/download.php?type=problem&id={$problem['id']}") ?>">
-				<i class="bi bi-hdd-stack"></i>
-				测试数据
-			</a>
-		</li>
-		<li class="nav-item text-start">
-			<a class="nav-link" href="<?= HTML::url("/download.php?type=attachment&id={$problem['id']}") ?>">
-				<i class="bi bi-download"></i>
-				附件下载
-			</a>
-		</li>
-	</ul>
-</div>
+		<!-- 题目导航卡片 -->
+		<div class="card card-default mb-2">
+			<ul class="nav nav-pills nav-fill flex-column" role="tablist">
+				<li class="nav-item text-start">
+					<a href="#statement" class="nav-link active" role="tab" data-bs-toggle="pill" data-bs-target="#statement">
+						<i class="bi bi-journal-text"></i>
+						<?= UOJLocale::get('problems::statement') ?>
+					</a>
+				</li>
+				<li class="nav-item text-start">
+					<a href="#submit" class="nav-link" role="tab" data-bs-toggle="pill" data-bs-target="#submit">
+						<i class="bi bi-upload"></i>
+						<?= UOJLocale::get('problems::submit') ?>
+					</a>
+				</li>
+				<?php if ($custom_test_enabled) : ?>
+					<li class="nav-item text-start">
+						<a class="nav-link" href="#custom-test" role="tab" data-bs-toggle="pill" data-bs-target="#custom-test">
+							<i class="bi bi-braces"></i>
+							<?= UOJLocale::get('problems::custom test') ?>
+						</a>
+					</li>
+				<?php endif ?>
+				<?php if (!UOJContest::cur() || UOJContest::cur()->progress() >= CONTEST_FINISHED) : ?>
+					<li class="nav-item text-start">
+						<a href="/problem/<?= $problem['id'] ?>/solutions" class="nav-link" role="tab">
+							<i class="bi bi-journal-bookmark"></i>
+							<?= UOJLocale::get('problems::solutions') ?>
+						</a>
+					</li>
+				<?php endif ?>
+				<?php if (UOJContest::cur() && UOJContest::cur()->userCanSeeProblemStatistics(Auth::user())) : ?>
+					<li class="nav-item text-start">
+						<a class="nav-link" href="/contest/<?= UOJContest::info('id') ?>/problem/<?= $problem['id'] ?>/statistics">
+							<i class="bi bi-graph-up"></i>
+							<?= UOJLocale::get('problems::statistics') ?>
+						</a>
+					</li>
+				<?php elseif (!UOJContest::cur()) : ?>
+					<li class="nav-item text-start">
+						<a class="nav-link" href="/problem/<?= $problem['id'] ?>/statistics">
+							<i class="bi bi-graph-up"></i>
+							<?= UOJLocale::get('problems::statistics') ?>
+						</a>
+					</li>
+				<?php endif ?>
+				<?php if (UOJProblem::cur()->userCanManage(Auth::user())) : ?>
+					<li class="nav-item text-start">
+						<a class="nav-link" href="/problem/<?= $problem['id'] ?>/manage/statement" role="tab">
+							<i class="bi bi-sliders"></i>
+							<?= UOJLocale::get('problems::manage') ?>
+						</a>
+					</li>
+				<?php endif ?>
+			</ul>
+			<div class="card-footer bg-transparent">
+				评价：<?= ClickZans::getBlock('P', $problem['id'], $problem['zan']) ?>
+			</div>
+		</div>

-<?php
-	$sidebar_config = array();
-	if ($contest && $contest['cur_progress'] <= CONTEST_IN_PROGRESS) {
-		$sidebar_config['upcoming_contests_hidden'] = '';
-	}
-	uojIncludeView('sidebar', $sidebar_config);
-	?>
-</aside>
-<!-- end right col -->
+		<!-- 附件 -->
+		<div class="card card-default mb-2">
+			<ul class="nav nav-fill flex-column">
+				<?php if (UOJProblem::cur()->userCanDownloadTestData(Auth::user())) : ?>
+					<li class="nav-item text-start">
+						<a class="nav-link" href="<?= HTML::url("/download/problem/{$problem['id']}/data.zip") ?>">
+							<i class="bi bi-hdd-stack"></i>
+							测试数据
+						</a>
+					</li>
+				<?php endif ?>
+				<li class="nav-item text-start">
+					<a class="nav-link" href="<?= HTML::url("/download/problem/{$problem['id']}/attachment.zip") ?>">
+						<i class="bi bi-download"></i>
+						附件下载
+					</a>
+				</li>
+			</ul>
+		</div>
+
+		<?php
+		$sidebar_config = [];
+		if (UOJContest::cur() && UOJContest::cur()->progress() <= CONTEST_IN_PROGRESS) {
+			$sidebar_config['upcoming_contests_hidden'] = '';
+		}
+		uojIncludeView('sidebar', $sidebar_config);
+		?>
+	</aside>
+	<!-- end right col -->

 </div>

 <script>
-$(document).ready(function() {
-	// Javascript to enable link to tab
-	var hash = location.hash.replace(/^#/, '');
-	if (hash) {
-		bootstrap.Tab.jQueryInterface.call($('.nav-pills a[href="#' + hash + '"]'), 'show').blur();
-	}
-
-	// Change hash for page-reload
-	$('.nav-pills a').on('shown.bs.tab', function(e) {
-		if (e.target.hash == '#statement') {
-			window.location.hash = '';
-		} else {
-			window.location.hash = e.target.hash;
+	$(document).ready(function() {
+		// Javascript to enable link to tab
+		var hash = location.hash.replace(/^#/, '');
+		if (hash) {
+			bootstrap.Tab.jQueryInterface.call($('.nav-pills a[href="#' + hash + '"]'), 'show').blur();
 		}
-	});
-});
-</script>

-<?php if ($contest && $contest['cur_progress'] <= CONTEST_IN_PROGRESS): ?>
-<script type="text/javascript">
-checkContestNotice(<?= $contest['id'] ?>, '<?= UOJTime::$time_now_str ?>');
+		// Change hash for page-reload
+		$('.nav-pills a').on('shown.bs.tab', function(e) {
+			if (e.target.hash == '#statement') {
+				window.location.hash = '';
+			} else {
+				window.location.hash = e.target.hash;
+			}
+		});
+	});
 </script>
-<?php endif ?>

 <?php echoUOJPageFooter() ?>
--- a/web/app/controllers/problem_data_manage.php
+++ b/web/app/controllers/problem_data_manage.php
--- a/web/app/controllers/problem_managers_manage.php
+++ b/web/app/controllers/problem_managers_manage.php
@ -1,169 +1,171 @@
 <?php
-	requireLib('bootstrap5');
-	requirePHPLib('form');
+requireLib('bootstrap5');
+requirePHPLib('form');

-	if (!Auth::check() && UOJConfig::$data['switch']['force-login']) {
-		redirectToLogin();
-	}
+Auth::check() || redirectToLogin();
+UOJProblem::init(UOJRequest::get('id')) || UOJResponse::page404();
+UOJProblem::cur()->userCanManage(Auth::user()) || UOJResponse::page403();

-	if (!validateUInt($_GET['id']) || !($problem = queryProblemBrief($_GET['id']))) {
-		become404Page();
-	}
-	if (!hasProblemPermission($myUser, $problem)) {
-		become403Page();
+$managers_form = newAddDelCmdForm(
+	'managers',
+	'validateUserAndStoreByUsername',
+	function ($type, $username, &$vdata) {
+		$user = $vdata['user'][$username];
+		if ($type == '+') {
+			DB::insert([
+				"insert into problems_permissions",
+				"(problem_id, username)",
+				"values", DB::tuple([UOJProblem::info('id'), $user['username']])
+			]);
+		} else if ($type == '-') {
+			DB::delete([
+				"delete from problems_permissions",
+				"where", [
+					"problem_id" => UOJProblem::info('id'),
+					"username" => $user['username']
+				]
+			]);
+		}
 	}
+);

-	$managers_form = newAddDelCmdForm('managers',
-		function($username) {
-			if (!validateUsername($username) || !queryUser($username)) {
-				return "不存在名为{$username}的用户";
+$managers_form->runAtServer();
+
+if (isSuperUser($myUser)) {
+	$update_uploader_form = new UOJBs4Form('update_uploader');
+	$update_uploader_form->addInput(
+		'new_uploader_username',
+		'text',
+		'用户名',
+		$problem['uploader'] ?: 'root',
+		function ($username, &$vdata) {
+			if (!UOJUser::query($username)) {
+				return '用户不存在';
 			}
+
+			$vdata['username'] = $username;
+
 			return '';
 		},
-		function($type, $username) {
-			global $problem;
-			if ($type == '+') {
-				DB::query("insert into problems_permissions (problem_id, username) values (${problem['id']}, '$username')");
-			} elseif ($type == '-') {
-				DB::query("delete from problems_permissions where problem_id = ${problem['id']} and username = '$username'");
-			}
-		}
+		null
 	);
-	
-	$managers_form->runAtServer();
-
-	
-	if (isSuperUser($myUser)) {
-		$update_uploader_form = new UOJForm('update_uploader');
-		$update_uploader_form->addInput('new_uploader_username', 'text', '用户名', $problem['uploader'] ?: 'root', 
-			function ($x) {
-				if (!validateUsername($x)) {
-					return '用户名不合法';
-				}
-
-				if (!queryUser($x)) {
-					return '用户不存在';
-				}
-
-				return '';
-			},
-			null
-		);
-		$update_uploader_form->submit_button_config['align'] = 'compressed';
-		$update_uploader_form->submit_button_config['text'] = '修改上传者';
-		$update_uploader_form->submit_button_config['class_str'] = 'mt-2 btn btn-warning';
-		$update_uploader_form->handle = function() {
-			global $problem;
-
-			$username = $_POST['new_uploader_username'];
-
-			DB::query("update problems set uploader = '{$username}' where id = {$problem['id']}");
-		};
-		$update_uploader_form->runAtServer();
-	}
-	?>
-<?php echoUOJPageHeader(HTML::stripTags($problem['title']) . ' - 管理者 - 题目管理') ?>
+	$update_uploader_form->submit_button_config['align'] = 'compressed';
+	$update_uploader_form->submit_button_config['text'] = '修改上传者';
+	$update_uploader_form->submit_button_config['class_str'] = 'mt-2 btn btn-warning';
+	$update_uploader_form->handle = function (&$vdata) {
+		DB::update([
+			"update problems",
+			"set", ["uploader" => $vdata['username']],
+			"where", ["id" => UOJProblem::info('id')]
+		]);
+	};
+	$update_uploader_form->runAtServer();
+}
+?>
+<?php echoUOJPageHeader('管理者 - ' . HTML::stripTags($problem['title'])) ?>

 <div class="row">
-<!-- left col -->
-<div class="col-lg-9">
+	<!-- left col -->
+	<div class="col-lg-9">
+		<h1>
+			<?= UOJProblem::cur()->getTitle() ?> 管理
+		</h1>

-<h1 class="h2">
-	#<?= $problem['id'] ?>. <?= $problem['title'] ?> 管理
-</h1>
+		<ul class="nav nav-pills my-3" role="tablist">
+			<li class="nav-item">
+				<a class="nav-link" href="/problem/<?= UOJProblem::info('id') ?>/manage/statement" role="tab">
+					题面
+				</a>
+			</li>
+			<li class="nav-item">
+				<a class="nav-link active" href="/problem/<?= UOJProblem::info('id') ?>/manage/managers" role="tab">
+					管理者
+				</a>
+			</li>
+			<li class="nav-item">
+				<a class="nav-link" href="/problem/<?= UOJProblem::info('id') ?>/manage/data" role="tab">
+					数据
+				</a>
+			</li>
+		</ul>

-<ul class="nav nav-pills my-3" role="tablist">
-	<li class="nav-item">
-		<a class="nav-link" href="/problem/<?= $problem['id'] ?>/manage/statement" role="tab">
-			题面
-		</a>
-	</li>