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<?php
/**
 * The followings are the available columns in table 'tbl_lookup':
 * @property integer $id
 * @property string $object_type
 * @property integer $code
 * @property string $name_en
 * @property string $name_fr
 * @property integer $sequence
 * @property integer $status
 */
class Lookup extends CActiveRecord
{
	private static $_items=array();

/**
	 * Returns the static model of the specified AR class.
	 * @return static the static model class
	 */
	public static function model($className=__CLASS__)
	{
		return parent::model($className);
	}

/**
	 * @return string the associated database table name
	 */
	public function tableName()
	{
		return '{{lookup}}';
	}

/**
	 * Returns the items for the specified type.
	 * @param string item type (e.g. 'PostStatus').
	 * @return array item names indexed by item code. The items are order by their position values.
	 * An empty array is returned if the item type does not exist.
	 */
	public static function items($type)
	{
		if(!isset(self::$_items[$type]))
			self::loadItems($type);
		return self::$_items[$type];
	}

/**
	 * Returns the item name for the specified type and code.
	 * @param string the item type (e.g. 'PostStatus').
	 * @param integer the item code (corresponding to the 'code' column value)
	 * @return string the item name for the specified the code. False is returned if the item type or code does not exist.
	 */
	public static function item($type,$code)
	{
		if(!isset(self::$_items[$type]))
			self::loadItems($type);
		return isset(self::$_items[$type][$code]) ? self::$_items[$type][$code] : false;
	}

/**
	 * Loads the lookup items for the specified type from the database.
	 * @param string the item type
	 */
	private static function loadItems($type)
	{
		self::$_items[$type]=array();
		$models=self::model()->findAll(array(
			'condition'=>'type=:type',
			'params'=>array(':type'=>$type),
			'order'=>'position',
		));
		foreach($models as $model)
			self::$_items[$type][$model->code]=$model->name;
	}
}