Management controllers: move table queries into models

models/Tag.php

@@ -24,6 +24,11 @@ class Tag
 			$this->$attribute = $value;
 	}
 
+	public function __toString()
+	{
+		return $this->tag;
+	}
+
 	public static function fromId($id_tag, $return_format = 'object')
 	{
 		$db = Registry::get('db');
@@ -409,27 +414,98 @@ class Tag
 			['tags' => $tags]);
 	}
 
-	public static function getCount($only_active = 1, $kind = '')
+	public static function getCount($only_used = true, $kind = '', $isAlbum = false)
 	{
 		$where = [];
-		if ($only_active)
+		if ($only_used)
 			$where[] = 'count > 0';
-		if (!empty($kind))
-			$where[] = 'kind = {string:kind}';
+		if (empty($kind))
+			$kind = 'Album';
 
-		if (!empty($where))
-			$where = 'WHERE ' . implode(' AND ', $where);
-		else
-			$where = '';
+		$where[] = 'kind {raw:operator} {string:kind}';
+		$where = implode(' AND ', $where);
 
 		return Registry::get('db')->queryValue('
 			SELECT COUNT(*)
-			FROM tags ' . $where,
-			['kind' => $kind]);
+			FROM tags
+			WHERE ' . $where,
+			[
+				'kind' => $kind,
+				'operator' => $isAlbum ? '=' : '!=',
+			]);
 	}
 
-	public function __toString()
+	public static function getOffset($offset, $limit, $order, $direction, $isAlbum = false)
 	{
-		return $this->tag;
+		assert(in_array($order, ['id_tag', 'tag', 'slug', 'count']));
+
+		$db = Registry::get('db');
+		$res = $db->query('
+			SELECT t.*, u.id_user, u.first_name, u.surname
+			FROM tags AS t
+			LEFT JOIN users AS u ON t.id_user_owner = u.id_user
+			WHERE kind {raw:operator} {string:album}
+			ORDER BY id_parent, {raw:order}
+			LIMIT {int:offset}, {int:limit}',
+			[
+				'order' => $order . ($direction === 'up' ? ' ASC' : ' DESC'),
+				'offset' => $offset,
+				'limit' => $limit,
+				'album' => 'Album',
+				'operator' => $isAlbum ? '=' : '!=',
+			]);
+
+		$albums_by_parent = [];
+		while ($row = $db->fetch_assoc($res))
+		{
+			if (!isset($albums_by_parent[$row['id_parent']]))
+				$albums_by_parent[$row['id_parent']] = [];
+
+			$albums_by_parent[$row['id_parent']][] = $row + ['children' => []];
+		}
+
+		$albums = self::getChildrenRecursively(0, 0, $albums_by_parent);
+		$rows = self::flattenChildrenRecursively($albums);
+
+		return $rows;
+	}
+
+	private static function getChildrenRecursively($id_parent, $level, &$albums_by_parent)
+	{
+		$children = [];
+		if (!isset($albums_by_parent[$id_parent]))
+			return $children;
+
+		foreach ($albums_by_parent[$id_parent] as $child)
+		{
+			if (isset($albums_by_parent[$child['id_tag']]))
+				$child['children'] = self::getChildrenRecursively($child['id_tag'], $level + 1, $albums_by_parent);
+
+			$child['tag'] = ($level ? str_repeat('—', $level * 2) . ' ' : '') . $child['tag'];
+			$children[] = $child;
+		}
+
+		return $children;
+	}
+
+	private static function flattenChildrenRecursively($albums)
+	{
+		if (empty($albums))
+			return [];
+
+		$rows = [];
+		foreach ($albums as $album)
+		{
+			static $headers_to_keep = ['id_tag', 'tag', 'slug', 'count', 'id_user', 'first_name', 'surname'];
+			$rows[] = array_intersect_key($album, array_flip($headers_to_keep));
+			if (!empty($album['children']))
+			{
+				$children = self::flattenChildrenRecursively($album['children']);
+				foreach ($children as $child)
+					$rows[] = array_intersect_key($child, array_flip($headers_to_keep));
+			}
+		}
+
+		return $rows;
 	}
 }