1: <?php
 2: /**
 3:  * CGettextPoFile class file.
 4:  *
 5:  * @author Qiang Xue <qiang.xue@gmail.com>
 6:  * @link http://www.yiiframework.com/
 7:  * @copyright 2008-2013 Yii Software LLC
 8:  * @license http://www.yiiframework.com/license/
 9:  */
10: 
11: /**
12:  * CGettextPoFile represents a PO Gettext message file.
13:  *
14:  * @author Qiang Xue <qiang.xue@gmail.com>
15:  * @package system.i18n.gettext
16:  * @since 1.0
17:  */
18: class CGettextPoFile extends CGettextFile
19: {
20:     /**
21:      * Loads messages from a PO file.
22:      * @param string $file file path
23:      * @param string $context message context
24:      * @return array message translations (source message => translated message)
25:      */
26:     public function load($file,$context)
27:     {
28:         $pattern='/(msgctxt\s+"(.*?(?<!\\\\))")?\s+'
29:             .'msgid\s+((?:".*(?<!\\\\)"\s*)+)\s+'
30:             .'msgstr\s+((?:".*(?<!\\\\)"\s*)+)/';
31:         $matches=array();
32:         $n=preg_match_all($pattern,file_get_contents($file),$matches);
33: 
34:         $messages=array();
35:         for($i=0; $i<$n; $i++)
36:         {
37:             if($matches[2][$i]===$context)
38:             {
39:                 $id=$this->decode($matches[3][$i]);
40:                 $message=$this->decode($matches[4][$i]);
41:                 $messages[$id]=$message;
42:             }
43:         }
44:         return $messages;
45:     }
46: 
47:     /**
48:      * Saves messages to a PO file.
49:      * @param string $file file path
50:      * @param array $messages message translations (message id => translated message).
51:      * Note if the message has a context, the message id must be prefixed with
52:      * the context with chr(4) as the separator.
53:      */
54:     public function save($file,$messages)
55:     {
56:         $content='';
57:         foreach($messages as $id=>$message)
58:         {
59:             if(($pos=strpos($id,chr(4)))!==false)
60:             {
61:                 $content.='msgctxt "'.substr($id,0,$pos)."\"\n";
62:                 $id=substr($id,$pos+1);
63:             }
64:             $content.='msgid "'.$this->encode($id)."\"\n";
65:             $content.='msgstr "'.$this->encode($message)."\"\n\n";
66:         }
67:         file_put_contents($file,$content);
68:     }
69: 
70:     /**
71:      * Encodes special characters in a message.
72:      * @param string $string message to be encoded
73:      * @return string the encoded message
74:      */
75:     protected function encode($string)
76:     {
77:         return str_replace(
78:             array('"',"\n","\t","\r"),
79:             array('\\"',"\\n",'\\t','\\r'),
80:             $string
81:         );
82:     }
83: 
84:     /**
85:      * Decodes special characters in a message.
86:      * @param string $string message to be decoded
87:      * @return string the decoded message
88:      */
89:     protected function decode($string)
90:     {
91:         $string=preg_replace(
92:             array('/"\s+"/','/\\\\n/','/\\\\r/','/\\\\t/','/\\\\"/'),
93:             array('',"\n","\r","\t",'"'),
94:             $string
95:         );
96:         return substr(rtrim($string),1,-1);
97:     }
98: }
99: