/**
* 设置图集封面ID
* @param int $g_id
* @param int $p_id 为0时置空
* @param int $u_id
* @return array|null
*/
public function set_front_cover($g_id, $p_id, $u_id)
{
$g_id = intval($g_id);
$p_id = intval($p_id);
$u_id = intval($u_id);
$this->galleryOwnerCheck($g_id, $u_id);
lib()->load('Picture');
if ($p_id < 1) {
$p_id = NULL;
$this->db->update("gallery", ['gallery_front_cover' => $p_id], ['id' => $g_id]);
return NULL;
} else {
$p = new Picture();
$p->picOwnerCheck($p_id, $u_id);
$this->db->update("gallery", ['gallery_front_cover' => $p_id], ['id' => $g_id]);
return $p->get($p_id, $u_id);
}
}
