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<?php
/**
* CGettextPoFile class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright 2008-2013 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CGettextPoFile represents a PO Gettext message file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package system.i18n.gettext
* @since 1.0
*/
class CGettextPoFile extends CGettextFile
{
/**
* Loads messages from a PO file.
* @param string $file file path
* @param string $context message context
* @return array message translations (source message => translated message)
*/
public function load($file,$context)
{
$pattern='/(msgctxt\s+"(.*?(?<!\\\\))")?\s+'
.'msgid\s+((?:".*(?<!\\\\)"\s*)+)\s+'
.'msgstr\s+((?:".*(?<!\\\\)"\s*)+)/';
$matches=array();
$n=preg_match_all($pattern,file_get_contents($file),$matches);
$messages=array();
for($i=0; $i<$n; $i++)
{
if($matches[2][$i]===$context)
{
$id=$this->decode($matches[3][$i]);
$message=$this->decode($matches[4][$i]);
$messages[$id]=$message;
}
}
return $messages;
}
/**
* Saves messages to a PO file.
* @param string $file file path
* @param array $messages message translations (message id => translated message).
* Note if the message has a context, the message id must be prefixed with
* the context with chr(4) as the separator.
*/
public function save($file,$messages)
{
$content='';
foreach($messages as $id=>$message)
{
if(($pos=strpos($id,chr(4)))!==false)
{
$content.='msgctxt "'.substr($id,0,$pos)."\"\n";
$id=substr($id,$pos+1);
}
$content.='msgid "'.$this->encode($id)."\"\n";
$content.='msgstr "'.$this->encode($message)."\"\n\n";
}
file_put_contents($file,$content);
}
/**
* Encodes special characters in a message.
* @param string $string message to be encoded
* @return string the encoded message
*/
protected function encode($string)
{
return str_replace(
array('"',"\n","\t","\r"),
array('\\"',"\\n",'\\t','\\r'),
$string
);
}
/**
* Decodes special characters in a message.
* @param string $string message to be decoded
* @return string the decoded message
*/
protected function decode($string)
{
$string=preg_replace(
array('/"\s+"/','/\\\\n/','/\\\\r/','/\\\\t/','/\\\\"/'),
array('',"\n","\r","\t",'"'),
$string
);
return substr(rtrim($string),1,-1);
}
}
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