/**
* Static function to find the tm_id for a string tag. If the tag doesn't
* exist, it will be created.
*
* A doctrine exception will be thrown if the tag string is invalid
*
* @param string $tagstr
* @return int
*/
public static function get_tm_id($tagstr)
{
if (!$tagstr || !is_string($tagstr) || !strlen($tagstr)) {
throw new Exception('Invalid non-string tag');
}
// check cache
$lower = strtolower($tagstr);
if (isset(self::$TM_ID_CACHE[$lower])) {
return self::$TM_ID_CACHE[$lower];
}
// lookup or create
$tm = Doctrine::getTable('TagMaster')->findOneBy('tm_name', $tagstr);
if (!$tm) {
$tm = new TagMaster();
$tm->tm_name = $tagstr;
$tm->tm_type = TagMaster::$TYPE_JOURNALISTIC;
$tm->save();
// could throw exception
}
// cache and return
self::$TM_ID_CACHE[$lower] = $tm->tm_id;
return $tm->tm_id;
}
