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<?php
class posts {
public static function getPostsCount(bool $include_hidden = false): int {
$db = getDb();
$sql = "SELECT COUNT(*) FROM posts";
if (!$include_hidden) {
$sql .= " WHERE visible=1";
}
return (int)$db->result($db->query($sql));
}
public static function getPostsCountByTagId(int $tag_id, bool $include_hidden = false): int {
$db = getDb();
if ($include_hidden) {
$sql = "SELECT COUNT(*) FROM posts_tags WHERE tag_id=?";
} else {
$sql = "SELECT COUNT(*) FROM posts_tags
LEFT JOIN posts ON posts.id=posts_tags.post_id
WHERE posts_tags.tag_id=? AND posts.visible=1";
}
return (int)$db->result($db->query($sql, $tag_id));
}
/**
* @return Post[]
*/
public static function getPosts(int $offset = 0, int $count = -1, bool $include_hidden = false): array {
$db = getDb();
$sql = "SELECT * FROM posts";
if (!$include_hidden)
$sql .= " WHERE visible=1";
$sql .= " ORDER BY ts DESC";
if ($offset != 0 && $count != -1)
$sql .= "LIMIT $offset, $count";
$q = $db->query($sql);
return array_map('Post::create_instance', $db->fetchAll($q));
}
/**
* @return Post[]
*/
public static function getPostsByTagId(int $tag_id, bool $include_hidden = false): array {
$db = getDb();
$sql = "SELECT posts.* FROM posts_tags
LEFT JOIN posts ON posts.id=posts_tags.post_id
WHERE posts_tags.tag_id=?";
if (!$include_hidden)
$sql .= " AND posts.visible=1";
$sql .= " ORDER BY posts.ts DESC";
$q = $db->query($sql, $tag_id);
return array_map('Post::create_instance', $db->fetchAll($q));
}
public static function add(array $data = []): int|bool {
$db = getDb();
$html = \markup::markdownToHtml($data['md']);
$text = \markup::htmlToText($html);
$data += [
'ts' => time(),
'html' => $html,
'text' => $text,
];
if (!$db->insert('posts', $data))
return false;
$id = $db->insertId();
$post = posts::get($id);
$post->updateImagePreviews();
return $id;
}
public static function delete(Post $post): void {
$tags = $post->getTags();
$db = getDb();
$db->query("DELETE FROM posts WHERE id=?", $post->id);
$db->query("DELETE FROM posts_tags WHERE post_id=?", $post->id);
foreach ($tags as $tag)
self::recountPostsWithTag($tag->id);
}
public static function getTagIds(array $tags): array {
$found_tags = [];
$map = [];
$db = getDb();
$q = $db->query("SELECT id, tag FROM tags
WHERE tag IN ('".implode("','", array_map(function($tag) use ($db) { return $db->escape($tag); }, $tags))."')");
while ($row = $db->fetch($q)) {
$found_tags[] = $row['tag'];
$map[$row['tag']] = (int)$row['id'];
}
$notfound_tags = array_diff($tags, $found_tags);
if (!empty($notfound_tags)) {
foreach ($notfound_tags as $tag) {
$db->insert('tags', ['tag' => $tag]);
$map[$tag] = $db->insertId();
}
}
return $map;
}
public static function get(int $id): ?Post {
$db = getDb();
$q = $db->query("SELECT * FROM posts WHERE id=?", $id);
return $db->numRows($q) ? new Post($db->fetch($q)) : null;
}
public static function getPostByName(string $short_name): ?Post {
$db = getDb();
$q = $db->query("SELECT * FROM posts WHERE short_name=?", $short_name);
return $db->numRows($q) ? new Post($db->fetch($q)) : null;
}
public static function getPostsById(array $ids, bool $flat = false): array {
if (empty($ids)) {
return [];
}
$db = getDb();
$posts = array_fill_keys($ids, null);
$q = $db->query("SELECT * FROM posts WHERE id IN(".implode(',', $ids).")");
while ($row = $db->fetch($q)) {
$posts[(int)$row['id']] = new Post($row);
}
if ($flat) {
$list = [];
foreach ($ids as $id) {
$list[] = $posts[$id];
}
unset($posts);
return $list;
}
return $posts;
}
public static function getAllTags(bool $include_hidden = false): array {
$db = getDb();
$field = $include_hidden ? 'posts_count' : 'visible_posts_count';
$q = $db->query("SELECT * FROM tags WHERE $field > 0 ORDER BY $field DESC, tag");
return array_map('Tag::create_instance', $db->fetchAll($q));
}
public static function getTag(string $tag): ?Tag {
$db = getDb();
$q = $db->query("SELECT * FROM tags WHERE tag=?", $tag);
return $db->numRows($q) ? new Tag($db->fetch($q)) : null;
}
/**
* @param int $tag_id
*/
public static function recountPostsWithTag($tag_id) {
$db = getDb();
$count = $db->result($db->query("SELECT COUNT(*) FROM posts_tags WHERE tag_id=?", $tag_id));
$vis_count = $db->result($db->query("SELECT COUNT(*) FROM posts_tags
LEFT JOIN posts ON posts.id=posts_tags.post_id
WHERE posts_tags.tag_id=? AND posts.visible=1", $tag_id));
$db->query("UPDATE tags SET posts_count=?, visible_posts_count=? WHERE id=?",
$count, $vis_count, $tag_id);
}
public static function splitStringToTags(string $tags): array {
$tags = trim($tags);
if ($tags == '') {
return [];
}
$tags = preg_split('/,\s+/', $tags);
$tags = array_filter($tags, function($tag) { return trim($tag) != ''; });
$tags = array_map('trim', $tags);
$tags = array_map('mb_strtolower', $tags);
return $tags;
}
}
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