From 73f52989115344e06c4dca99daa7d74c4f59df92 Mon Sep 17 00:00:00 2001
From: Baoshuo <i@baoshuo.ren>
Date: Thu, 19 Jan 2023 11:49:15 +0800
Subject: [PATCH] feat(problem): display remote problem url

---
 web/app/models/UOJProblem.php       |  6 +++++-
 web/app/models/UOJRemoteProblem.php | 18 ++++++++++++++----
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/web/app/models/UOJProblem.php b/web/app/models/UOJProblem.php
index 3bae2cf..463d623 100644
--- a/web/app/models/UOJProblem.php
+++ b/web/app/models/UOJProblem.php
@@ -392,6 +392,7 @@ class UOJProblem {
 		}
 
 		$remote_oj = $this->getExtraConfig('remote_online_judge');
+		$remote_id = $this->getExtraConfig('remote_problem_id');
 
 		if (!$remote_oj || !array_key_exists($remote_oj, UOJRemoteProblem::$providers)) {
 			return 'Error';
@@ -399,7 +400,10 @@ class UOJProblem {
 
 		$provider = UOJRemoteProblem::$providers[$remote_oj];
 
-		return HTML::tag('a', ['href' => $provider['url'], 'target' => '_blank'], $provider['name']);
+		return HTML::tag('a', [
+			'href' => UOJRemoteProblem::getProblemRemoteUrl($remote_oj, $remote_id),
+			'target' => '_blank'
+		], $provider['name']);
 	}
 
 	public function getDifficultyHTML() {
diff --git a/web/app/models/UOJRemoteProblem.php b/web/app/models/UOJRemoteProblem.php
index e4c69f4..6074faa 100644
--- a/web/app/models/UOJRemoteProblem.php
+++ b/web/app/models/UOJRemoteProblem.php
@@ -6,7 +6,6 @@ class UOJRemoteProblem {
 			'name' => 'Codeforces',
 			'short_name' => 'CF',
 			'url' => 'https://codeforces.com',
-			'host' => 'https://codeforces.com',
 			'not_exists_texts' => [
 				'<th>Actions</th>',
 				'Statement is not available on English language',
@@ -16,16 +15,19 @@ class UOJRemoteProblem {
 		],
 	];
 
+	static function getCodeforcesProblemUrl($id) {
+		return static::$providers['codeforces']['url'] . '/problemset/problem/' . preg_replace_callback('/([1-9][0-9]{0,5})([A-Z][1-9]?)/', fn ($matches) => $matches[1] . '/' . $matches[2], $id);
+	}
+
 	// 传入 ID 需确保有效
 	static function getCodeforcesProblemBasicInfo($id) {
 		$curl = new Curl();
 		$curl->setUserAgent('Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.0.0 Safari/537.36 S2OJ/3.1.0');
 
 		$remote_provider = static::$providers['codeforces'];
-		$url_id = preg_replace_callback('/([1-9][0-9]{0,5})([A-Z][1-9]?)/', fn ($matches) => $matches[1] . '/' . $matches[2], $id);
 
-		$html = retry_loop(function () use ($curl, $url_id, $remote_provider) {
-			$curl->get($remote_provider['host'] . '/problemset/problem/' . $url_id);
+		$html = retry_loop(function () use ($curl, $id) {
+			$curl->get(static::getCodeforcesProblemUrl($id));
 
 			if ($curl->error) {
 				return false;
@@ -126,6 +128,14 @@ class UOJRemoteProblem {
 		];
 	}
 
+	public static function getProblemRemoteUrl($oj, $id) {
+		if ($oj === 'codeforces') {
+			return static::getCodeforcesProblemUrl($id);
+		}
+
+		return null;
+	}
+
 	public static function getProblemBasicInfo($oj, $id) {
 		if ($oj === 'codeforces') {
 			return static::getCodeforcesProblemBasicInfo($id);