<?php
require_once 'Zend/View/Abstract.php';
require_once 'CU/View/SpecialFormat/Translator/Interface.php';

/**
 * Base abstract class for special format views,
 * like JSON and XML output views
 *
 */
abstract class CU_View_SpecialFormat_Abstract extends Zend_View_Abstract  
{
	/**
	 * Object to Array translators
	 *
	 * @var array
	 */
	protected $_translators = array();
	
	/**
	 * Adds a translator for a class/classes
	 *
	 * @param CU_View_SpecialFormat_Translator_Interface $translator translator object
	 * @param string|array $objectType Name of the class/classes to apply translator to
	 */
	public function addTranslator(CU_View_SpecialFormat_Translator_Interface $translator, $objectType)
	{
		if(is_array($objectType))
		{
			foreach($objectType as $o)
				$this->_translators[$o] = $translator;
		}
		else 
			$this->_translators[$objectType] = $translator;
	}
	
	/**
	 * Returns list of object translators
	 *
	 * @return array
	 */
	public function getTranslators()
	{
		return $this->_translators;
	}	
	
	/**
	 * This method can be used to convert an array of 
	 * view variables into an usable object-translated array
	 *
	 * @param array $vars
	 * @return array
	 */
	protected function _translateVars(Array $vars)
	{
		$translated = array();
		
		foreach($vars as $key => $value)
		{
			if(is_object($value))
			{
				$class = get_class($value);
				if(isset($this->_translators[$class]))
					$translated[$key] = $this->_translators[$class]->translate($value);
			}
			else 
			{
				$translated[$key] = $value;
			}
		}
		
		return $translated;
	}
}