S2OJ/web/app/controllers/subdomain/blog/blog.php

<?php
requireLib('bootstrap5');
requireLib('mathjax');
requireLib('hljs');
requireLib('pdf.js');
requirePHPLib('form');

Auth::check() || redirectToLogin();
UOJBlog::init(UOJRequest::get('id')) || UOJResponse::page404();
UOJBlog::cur()->belongsToUserBlog() || UOJResponse::page404();
UOJBlog::cur()->userCanView(Auth::user()) || UOJResponse::page403();

$blog = UOJBlog::info();

function getCommentContentToDisplay($comment) {
	if (!$comment['is_hidden']) {
		return $comment['content'];
	} else {
		return '<span class="text-muted">【' . HTML::escape($comment['reason_to_hide']) . '】</span>';
	}
}

$comment_form = new UOJForm('comment');
$comment_form->addTextArea('comment', [
	'label' => '内容',
	'validator_php' => function ($comment) {
		if (!Auth::check()) {
			return '请先登录';
		}
		if (!$comment) {
			return '评论不能为空';
		}
		if (strlen($comment) > 1000) {
			return '不能超过1000个字节';
		}
		return '';
	},
]);
$comment_form->handle = function () {
	global $blog, $comment_form;
	$comment = HTML::escape($_POST['comment']);

	list($comment, $referrers) = uojHandleAtSign($comment, "/post/{$blog['id']}");

	DB::insert([
		"insert into blogs_comments",
		"(poster, blog_id, content, reply_id, post_time)",
		"values", DB::tuple([Auth::id(), $blog['id'], $comment, 0, DB::now()])
	]);
	$comment_id = DB::insert_id();

	$rank = DB::selectCount([
		"select count(*) from blogs_comments",
		"where", [
			"blog_id" => $blog['id'],
			"reply_id" => 0,
			["id", "<", $comment_id]
		]
	]);
	$page = floor($rank / 20) + 1;

	$uri = getLongTablePageUri($page) . '#' . "comment-{$comment_id}";
	$user_link = UOJUser::getLink(Auth::user());

	foreach ($referrers as $referrer) {
		$content = $user_link . ' 在博客 ' . $blog['title'] . ' 的评论里提到你：<a href="' . $uri . '">点击此处查看</a>';
		sendSystemMsg($referrer, '有人提到你', $content);
	}

	if ($blog['poster'] !== Auth::id()) {
		$content = $user_link . ' 回复了您的博客 ' . $blog['title'] . ' ：<a href="' . $uri . '">点击此处查看</a>';
		sendSystemMsg($blog['poster'], '博客新回复通知', $content);
	}

	UOJBlog::cur()->updateActiveTime();
	$comment_form->succ_href = getLongTablePageRawUri($page);
};
$comment_form->config['ctrl_enter_submit'] = true;
$comment_form->runAtServer();

$reply_form = new UOJForm('reply');
$reply_form->addHidden(
	'reply_id',
	'0',
	function ($reply_id, &$vdata) {
		global $blog;
		if (!validateUInt($reply_id) || $reply_id == 0) {
			return '您要回复的对象不存在';
		}
		$comment = UOJBlogComment::query($reply_id);
		if (!$comment || $comment->info['blog_id'] != $blog['id']) {
			return '您要回复的对象不存在';
		}
		$vdata['parent'] = $comment;
		return '';
	},
	null
);
$reply_form->addTextArea('reply_comment', [
	'label' => '内容',
	'validator_php' => function ($comment) {
		if (!Auth::check()) {
			return '请先登录';
		}
		if (!$comment) {
			return '评论不能为空';
		}
		if (strlen($comment) > 140) {
			return '不能超过140个字节';
		}
		return '';
	},
]);
$reply_form->handle = function (&$vdata) {
	global $blog, $reply_form;
	$comment = HTML::escape($_POST['reply_comment']);

	list($comment, $referrers) = uojHandleAtSign($comment, "/post/{$blog['id']}");

	$reply_id = $_POST['reply_id'];

	DB::insert([
		"insert into blogs_comments",
		"(poster, blog_id, content, reply_id, post_time)",
		"values", DB::tuple([Auth::id(), $blog['id'], $comment, $reply_id, DB::now()])
	]);
	$comment_id = DB::insert_id();

	$rank = DB::selectCount([
		"select count(*) from blogs_comments",
		"where", [
			"blog_id" => $blog['id'],
			"reply_id" => 0,
			["id", "<", $reply_id]
		]
	]);
	$page = floor($rank / 20) + 1;

	$uri = getLongTablePageUri($page) . '#' . "comment-{$reply_id}";
	$user_link = UOJUser::getLink(Auth::user());

	foreach ($referrers as $referrer) {
		$content = $user_link . ' 在博客 ' . $blog['title'] . ' 的评论里提到你：<a href="' . $uri . '">点击此处查看</a>';
		sendSystemMsg($referrer, '有人提到你', $content);
	}

	$parent = $vdata['parent'];
	$notified = [];
	if ($parent->info['poster'] !== Auth::id()) {
		$notified[] = $parent->info['poster'];
		$content = $user_link . ' 回复了您在博客 ' . $blog['title'] . ' 下的评论 ：<a href="' . $uri . '">点击此处查看</a>';
		sendSystemMsg($parent->info['poster'], '评论新回复通知', $content);
	}
	if ($blog['poster'] !== Auth::id() && !in_array($blog['poster'], $notified)) {
		$notified[] = $blog['poster'];
		$content = $user_link . '回复了您的博客 ' . $blog['title'] . ' ：<a href="' . $uri . '">点击此处查看</a>';
		sendSystemMsg($blog['poster'], '博客新回复通知', $content);
	}

	UOJBlog::cur()->updateActiveTime();

	$reply_form->succ_href = getLongTablePageRawUri($page);
};
$reply_form->config['ctrl_enter_submit'] = true;
$reply_form->runAtServer();

$comments_pag = new Paginator([
	'col_names' => ['*'],
	'table_name' => 'blogs_comments',
	'cond' => 'blog_id = ' . $blog['id'] . ' and reply_id = 0',
	'tail' => 'order by id asc',
	'page_len' => 20
]);
?>
<?php echoUOJPageHeader(HTML::stripTags($blog['title']) . ' - 博客') ?>
<?php UOJBlog::cur()->echoView(['show_title_only' => isset($_GET['page']) && $_GET['page'] != 1]) ?>

<h2>
	评论
	<i class="bi bi-chat-fill"></i>
</h2>

<div class="list-group">
	<?php if ($comments_pag->isEmpty()) : ?>
		<div class="list-group-item text-muted">暂无评论</div>
	<?php else : ?>
		<?php foreach ($comments_pag->get() as $comment) :
			$poster = UOJUser::query($comment['poster']);
			$esc_email = HTML::escape($poster['email']);
			$asrc = HTML::avatar_addr($poster, 80);

			$replies = DB::selectAll([
				"select id, poster, content, post_time, is_hidden, reason_to_hide from blogs_comments",
				"where", ["reply_id" => $comment['id']],
				"order by id"
			]);
			foreach ($replies as $idx => $reply) {
				$reply_user = UOJUser::query($reply['poster']);
				$replies[$idx]['poster_realname'] = $reply_user['realname'];
				$replies[$idx]['poster_username_color'] = UOJUser::getUserColor($reply_user);
				$replies[$idx]['content'] = getCommentContentToDisplay($reply);
			}
			$replies_json = json_encode($replies);
		?>
			<div id="comment-<?= $comment['id'] ?>" class="list-group-item">
				<div class="d-flex">
					<div class="mr-3 flex-shrink-0">
						<a href="<?= HTML::url('/user/' . $poster['username']) ?>" class="d-none d-sm-block text-decoration-none">
							<img class="media-object img-rounded" src="<?= $asrc ?>" alt="Avatar of <?= $poster['username'] ?>" width="64" height="64" />
						</a>
					</div>
					<div id="comment-body-<?= $comment['id'] ?>" class="flex-grow-1 ms-3">
						<div class="row justify-content-between flex-wrap">
							<div class="col-auto">
								<?= UOJUser::getLink($poster['username']) ?>
							</div>
							<div class="col-auto">
								<?= ClickZans::getBlock('BC', $comment['id'], $comment['zan']) ?>
							</div>
						</div>
						<div class="comment-content my-2"><?= $comment['content'] ?></div>
						<ul class="list-inline mb-0 text-end">
							<li class="list-inline-item small text-muted">
								<?= $comment['post_time'] ?>
							</li>
							<li class="list-inline-item">
								<a class="text-decoration-none" id="reply-to-<?= $comment['id'] ?>" href="#">
									回复
								</a>
							</li>
						</ul>
						<?php if ($replies) : ?>
							<div id="replies-<?= $comment['id'] ?>" class="rounded bg-secondary bg-opacity-10 border"></div>
						<?php endif ?>
						<script type="text/javascript">
							showCommentReplies('<?= $comment['id'] ?>', <?= $replies_json ?>);
						</script>
					</div>
				</div>
			</div>
		<?php endforeach ?>
	<?php endif ?>
</div>
<?= $comments_pag->pagination() ?>

<h3 class="mt-4">发表评论</h3>
<p>可以用 @mike 来提到 mike 这个用户，mike 会被高亮显示。如果你真的想打“@”这个字符，请用“@@”。</p>
<?php $comment_form->printHTML() ?>

<div id="div-form-reply" style="display:none">
	<?php $reply_form->printHTML() ?>
</div>

<?php echoUOJPageFooter() ?>