<?php
/* $Id$ */
namespace Mammut\Locale;

(defined('MAMMUT') && (basename(__FILE__) != basename($_SERVER['PHP_SELF']))) or die('ACCESS DENIED');

/**
 * XML file based translator class.
 * 
 * Translator class based on a language XML file
 *
 * @author Stefan Daurer <s.daurer@q-spot.org>
 * @package Mammut\Locale
 */
class TranslateXml extends TranslateBase implements iTranslate {

	/**
	 * @var \SimpleXMLElement 
	 */
	private $store;
	
	public function __construct($basepath, $locale) {
		$file = $basepath . DIRECTORY_SEPARATOR . $locale . '.xml';
		if(!file_exists($file))
			throw new \Mammut\IO\FileNotFoundException($file);
		$this->store = simplexml_load_file($file);
	}

	/**
	 * Main translate method.
	 * 
	 * Looks after the translated text, based on the key and optional values.
	 *
	 * @param string $key
	 *        	text base or key to search
	 * @param int $count
	 *        	count parameter value for the lookup
	 * @param string $gender
	 *        	genderized selection value for the lookup
	 * @param array $values        	
	 * @param boolean $nullOnFail
	 *        	the behaviour on missed translations. if true, the method returns null
	 *        	instead of the key.
	 * @return string the translated text. if not found, null or the key based on the
	 *         $nullOnFail parameter
	 */
	public function translate($key, $count = NULL, $gender = NULL, $values = array(), $nullOnFail = false) {
		if(is_string($gender))
			$gender = strtolower($gender);
		
		if(!in_array($gender, array(self::MALE,self::FEMALE,self::UNDEF)))
			$gender = NULL;
		
		if(is_scalar($values))
			$values = array($values);
		
		$search = "@key='{$key}'";
		if(is_numeric($count))
			$search .= " and (@n='$count' or @n='n' or not(@n))";
		else
			$search .= " and (@n='n' or not(@n))";
		
		switch($gender) {
			case self::MALE:
				$search .= " and (@gender='m' or not(@gender))";
			break;
			case self::FEMALE:
				$search .= " and (@gender='f' or not(@gender))";
			break;
			default:
				$search .= " and (@gender='u' or not(@gender))";
			break;
		}
		
		$result = $this->store->xpath("//text[{$search}]");
		if(count($result) == 1) {
			$result = (string) $result[0];
			foreach($values as $vKey=>$value)
				$result = str_replace('%' . $vKey, $value, $result);
			return $result;
		}
		else {
			$xPdAdd = "@key='{$key}'";
			foreach($values as $vKey=>$value) {
				if(is_numeric($vKey) && is_numeric($value))
					$xPdAdd .= " and (@n{$vKey}='$value' or @n{$vKey}='n' or not(@n{$vKey}))";
			}
			
			$xp = "//text[{$xPdAdd}]";
			$result = $this->store->xpath($xp);
			if (empty($result))
				return $key.'['.(is_array($values) ? implode('|',$values):$values).']';
			$result = (string) $result[0];
			foreach($values as $vKey=>$value)
				$result = str_replace('%' . $vKey, $value, $result);
			return $result;
		}
		return $nullOnFail ? NULL : $key;
	}

	public function tr($key, array $param = [], $nullOnFail = false) {
		return self::translate($key, NULL, NULL, $param, $nullOnFail);
	}

	public function trg($key, $gender, array $param = [], $nullOnFail = false) {
		return self::translate($key, NULL, $gender, $param, $nullOnFail);
	}

	public function trn($key, $count, array $param = [], $nullOnFail = false) {
		return self::translate($key, $count, NULL, $param, $nullOnFail);
	}
}