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fix: proper delete posts in a cyclical thread

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fowr 2024-08-06 11:49:51 -03:00
parent 021e20f373
commit 7f45f31aa8
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1 changed files with 36 additions and 5 deletions
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41
post.php
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@ -185,6 +185,41 @@ function strip_image_metadata(string $img_path): int {
return $ret; return $ret;
} }
/**
* Delete posts in a cyclical thread.
*
* @param string $boardUri The URI of the board.
* @param int $threadId The ID of the thread.
* @param int $cycleLimit The number of most recent posts to retain.
*/
function delete_cyclical_posts(string $boardUri, int $threadId, int $cycleLimit): void
{
$query = prepare(sprintf('
SELECT p.`id`
FROM ``posts_%s`` p
LEFT JOIN (
SELECT `id`
FROM ``posts_%s``
WHERE `thread` = :thread
ORDER BY `id` DESC
LIMIT :limit
) recent_posts ON p.id = recent_posts.id
WHERE p.thread = :thread
AND recent_posts.id IS NULL',
$boardUri, $boardUri
));
$query->bindValue(':thread', $threadId, PDO::PARAM_INT);
$query->bindValue(':limit', $cycleLimit, PDO::PARAM_INT);
$query->execute() or error(db_error($query));
$ids = $query->fetchAll(PDO::FETCH_COLUMN);
foreach ($ids as $id) {
deletePost($id, false);
}
}
/** /**
* Method handling functions * Method handling functions
*/ */
@ -1282,11 +1317,7 @@ if (isset($_POST['delete'])) {
// Handle cyclical threads // Handle cyclical threads
if (!$post['op'] && isset($thread['cycle']) && $thread['cycle']) { if (!$post['op'] && isset($thread['cycle']) && $thread['cycle']) {
// Query is a bit weird due to "This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'" (MariaDB Ver 15.1 Distrib 10.0.17-MariaDB, for Linux (x86_64)) delete_cyclical_posts($board['uri'], $post['thread'], $config['cycle_limit']);
$query = prepare(sprintf('DELETE FROM ``posts_%s`` WHERE `thread` = :thread AND `id` NOT IN (SELECT `id` FROM (SELECT `id` FROM ``posts_%s`` WHERE `thread` = :thread ORDER BY `id` DESC LIMIT :limit) i)', $board['uri'], $board['uri']));
$query->bindValue(':thread', $post['thread']);
$query->bindValue(':limit', $config['cycle_limit'], PDO::PARAM_INT);
$query->execute() or error(db_error($query));
} }
if (isset($post['antispam_hash'])) { if (isset($post['antispam_hash'])) {