$id]
]);
if (!$info) {
return null;
}
return new UOJBlog($info);
}
public function __construct($info) {
$this->info = $info;
}
/**
* Check if the blog belongs to the current user blog
*/
public function belongsToUserBlog() {
return UOJContext::type() == 'blog' && UOJUserBlog::id() === $this->info['poster'];
}
public function userCanView(array $user = null) {
if ($this->userCanManage($user)) {
return true;
}
if ($this->info['poster'] != $user['username'] && !UOJUser::checkPermission($user, 'blogs.view')) {
return false;
}
if ($problem_id = $this->getSolutionProblemId()) {
$contests = UOJContest::queryContestsHasProblem($problem_id);
foreach ($contests as $contest) {
if ($contest->userHasRegistered($user) && $contest->progress() <= CONTEST_IN_PROGRESS) {
return false;
}
}
}
return !$this->info['is_hidden'];
}
public function userCanManage(array $user = null) {
return UOJUserBlog::userCanManage($user, $this->info['poster']);
}
public function isTypeB() {
return $this->info['type'] === 'B';
}
public function isTypeS() {
return $this->info['type'] === 'S';
}
public function getTitle(array $cfg = []) {
$title = $this->info['title'];
return $title;
}
public function getBlogUri($where = '') {
return HTML::blog_url($this->info['poster'], "/post/{$this->info['id']}{$where}");
}
public function getSlideUri($where = '') {
return HTML::blog_url($this->info['poster'], "/slide/{$this->info['id']}{$where}");
}
public function getUriForWrite() {
return $this->isTypeB() ? $this->getBlogUri('/write') : $this->getSlideUri('/write');
}
public function getLink(array $cfg = []) {
// title has been escaped by the blog editor
$link = '';
if (!empty($cfg['show_level'])) {
$level_str = $this->getLevelString();
if ($level_str !== '') {
$link .= "{$level_str} ";
}
}
$link .= '' . $this->getTitle($cfg) . '';
if (!empty($cfg['show_new_tag'])) {
if ($this->isNew()) {
$link .= ' new';
}
}
return $link;
}
/**
* Return true if the blog is marked as "new".
* Call this function only if info['is_new'] has been filled by the corresponding value in the table important_blogs.
*/
public function isNew() {
return (time() - strtotime($this->info['post_time'])) / 3600 / 24 <= 7;
}
/**
* Return the string that shows the importance level of this blog.
* Call this function only if info['level'] has been filled by the corresponding value in the table important_blogs.
*/
public function getLevelString() {
$level = $this->info['level'];
switch ($level) {
case 1:
return '[三级置顶]';
case 2:
return '[二级置顶]';
case 3:
return '[一级置顶]';
default: // such as 0
return '';
}
}
public function queryNewestComment() {
return DB::selectFirst([
"select * from blogs_comments",
"where", [
'blog_id' => $this->info['id'],
'is_hidden' => false
],
"order by post_time desc",
DB::limit(1)
]);
}
public function updateActiveTime() {
$active_time = $this->info['post_time'];
$newest = $this->queryNewestComment();
if ($newest) {
$active_time = $newest['post_time'];
}
DB::update([
"update blogs",
"set", ['active_time' => $active_time],
"where", ['id' => $this->info['id']]
]);
}
public static function deleteByID($id) {
$id = (int)$id;
DB::delete([
"delete from click_zans",
"where", [
'type' => 'B',
'target_id' => $id
]
]);
DB::delete([
"delete from click_zans",
"where", [
'type' => 'BC',
[
"target_id", "in", DB::rawbracket([
"select id from blogs_comments",
"where", ["blog_id" => $id]
])
]
]
]);
DB::delete([
"delete from blogs",
"where", ['id' => $id]
]);
DB::delete([
"delete from blogs_comments",
"where", ['blog_id' => $id]
]);
DB::delete([
"delete from important_blogs",
"where", ['blog_id' => $id]
]);
DB::delete([
"delete from blogs_tags",
"where", ['blog_id' => $id]
]);
DB::delete([
"delete from problems_solutions",
"where", ['blog_id' => $id]
]);
}
public function delete() {
self::deleteByID($this->info['id']);
}
public function echoView(array $cfg = []) {
// load tags and content into cache
$this->queryContent();
$this->queryTags();
$cfg += [
'blog' => $this,
'show_title_only' => false,
'is_preview' => false
];
uojIncludeView('blog-preview', $cfg);
}
public function getSolutionProblemId() {
return DB::selectSingle([
DB::lc(), "select 1 from problems_solutions",
"where", [
"blog_id" => $this->info['id'],
],
]);
}
}
UOJBlog::$table_for_content = 'blogs';
UOJBlog::$key_for_content = 'id';
UOJBlog::$fields_for_content = ['content', 'content_md'];
UOJBlog::$table_for_tags = 'blogs_tags';
UOJBlog::$key_for_tags = 'blog_id';