public static function save_tags($tag_names, $news_id)
{
$saved_ids = array();
if (!is_array($tag_names)) {
$tag_names = (array) $tag_names;
}
if (!$tag_names) {
return $saved_ids;
}
$news_tag_ids4delete = self::get_assoc('tag_id', 'id', array('news_id' => $news_id));
$tag_ids = \Model_Tag::get_assoc('name', 'id', array('name', 'in', $tag_names));
foreach ($tag_names as $name) {
if (!empty($tag_ids[$name])) {
$tag_id = $tag_ids[$name];
} else {
$tag = \Model_Tag::forge(array('name' => $name));
$tag->save();
$tag_id = $tag->id;
}
if (!($news_tag = self::get_one4news_id_and_tag_id($news_id, $tag_id))) {
$news_tag = self::forge(array('news_id' => $news_id, 'tag_id' => $tag_id));
$news_tag->save();
$saved_ids[] = $news_tag->id;
}
if (isset($news_tag_ids4delete[$tag_id])) {
unset($news_tag_ids4delete[$tag_id]);
}
}
// delete records
if ($news_tag_ids4delete) {
foreach ($news_tag_ids4delete as $news_tag_id4delete) {
if ($news_tag = self::find($news_tag_id4delete)) {
$news_tag->delete();
}
}
}
return $saved_ids;
}
