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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\i18n;
use Yii;
/**
* GettextPoFile represents a PO Gettext message file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class GettextPoFile extends GettextFile
{
/**
* Loads messages from a PO file.
* @param string $filePath file path
* @param string $context message context
* @return array message translations. Array keys are source messages and array values are translated messages:
* source message => translated message.
*/
public function load($filePath, $context)
{
$pattern = '/(msgctxt\s+"(.*?(?<!\\\\))")?\s+' // context
. 'msgid\s+((?:".*(?<!\\\\)"\s*)+)\s+' // message ID, i.e. original string
. 'msgstr\s+((?:".*(?<!\\\\)"\s*)+)/'; // translated string
$content = file_get_contents($filePath);
$matches = [];
$matchCount = preg_match_all($pattern, $content, $matches);
$messages = [];
for ($i = 0; $i < $matchCount; ++$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 $filePath file path
* @param array $messages message translations. Array keys are source messages and array values are
* translated messages: source message => translated message. Note if the message has a context,
* the message ID must be prefixed with the context with chr(4) as the separator.
*/
public function save($filePath, $messages)
{
$language = str_replace('-', '_', basename(dirname($filePath)));
$headers = [
'msgid ""',
'msgstr ""',
'"Project-Id-Version: \n"',
'"POT-Creation-Date: \n"',
'"PO-Revision-Date: \n"',
'"Last-Translator: \n"',
'"Language-Team: \n"',
'"Language: ' . $language . '\n"',
'"MIME-Version: 1.0\n"',
'"Content-Type: text/plain; charset=' . Yii::$app->charset . '\n"',
'"Content-Transfer-Encoding: 8bit\n"',
];
$content = implode("\n", $headers) . "\n\n";
foreach ($messages as $id => $message) {
$separatorPosition = strpos($id, chr(4));
if ($separatorPosition !== false) {
$content .= 'msgctxt "' . substr($id, 0, $separatorPosition) . "\"\n";
$id = substr($id, $separatorPosition + 1);
}
$content .= 'msgid "' . $this->encode($id) . "\"\n";
$content .= 'msgstr "' . $this->encode($message) . "\"\n\n";
}
file_put_contents($filePath, $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(
['"', "\n", "\t", "\r"],
['\\"', '\\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(
['/"\s+"/', '/\\\\n/', '/\\\\r/', '/\\\\t/', '/\\\\"/'],
['', "\n", "\r", "\t", '"'],
$string
);
return substr(rtrim($string), 1, -1);
}
}
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