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<?php
/**
* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
* @link https://cakephp.org CakePHP(tm) Project
* @since 3.0.0
* @license https://opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\I18n\Parser;
use Cake\I18n\Translator;
/**
* Parses file in PO format
*
* @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/)
* @copyright Copyright (c) 2012, Clemens Tolboom
* @copyright Copyright (c) 2014, Fabien Potencier https://github.com/symfony/Translation/blob/master/LICENSE
*/
class PoFileParser
{
/**
* Parses portable object (PO) format.
*
* From https://www.gnu.org/software/gettext/manual/gettext.html#PO-Files
* we should be able to parse files having:
*
* white-space
* # translator-comments
* #. extracted-comments
* #: reference...
* #, flag...
* #| msgid previous-untranslated-string
* msgid untranslated-string
* msgstr translated-string
*
* extra or different lines are:
*
* #| msgctxt previous-context
* #| msgid previous-untranslated-string
* msgctxt context
*
* #| msgid previous-untranslated-string-singular
* #| msgid_plural previous-untranslated-string-plural
* msgid untranslated-string-singular
* msgid_plural untranslated-string-plural
* msgstr[0] translated-string-case-0
* ...
* msgstr[N] translated-string-case-n
*
* The definition states:
* - white-space and comments are optional.
* - msgid "" that an empty singleline defines a header.
*
* This parser sacrifices some features of the reference implementation the
* differences to that implementation are as follows.
* - Translator and extracted comments are treated as being the same type.
* - Message IDs are allowed to have other encodings as just US-ASCII.
*
* Items with an empty id are ignored.
*
* @param string $resource The file name to parse
*
* @return array
*/
public function parse($resource)
{
$stream = fopen($resource, 'rb');
$defaults = [
'ids' => [],
'translated' => null
];
$messages = [];
$item = $defaults;
$stage = null;
while ($line = fgets($stream)) {
$line = trim($line);
if ($line === '') {
// Whitespace indicated current item is done
$this->_addMessage($messages, $item);
$item = $defaults;
$stage = null;
} elseif (substr($line, 0, 7) === 'msgid "') {
// We start a new msg so save previous
$this->_addMessage($messages, $item);
$item['ids']['singular'] = substr($line, 7, -1);
$stage = ['ids', 'singular'];
} elseif (substr($line, 0, 8) === 'msgstr "') {
$item['translated'] = substr($line, 8, -1);
$stage = ['translated'];
} elseif (substr($line, 0, 9) === 'msgctxt "') {
$item['context'] = substr($line, 9, -1);
$stage = ['context'];
} elseif ($line[0] === '"') {
switch (count($stage)) {
case 2:
$item[$stage[0]][$stage[1]] .= substr($line, 1, -1);
break;
case 1:
$item[$stage[0]] .= substr($line, 1, -1);
break;
}
} elseif (substr($line, 0, 14) === 'msgid_plural "') {
$item['ids']['plural'] = substr($line, 14, -1);
$stage = ['ids', 'plural'];
} elseif (substr($line, 0, 7) === 'msgstr[') {
$size = strpos($line, ']');
$row = (int)substr($line, 7, 1);
$item['translated'][$row] = substr($line, $size + 3, -1);
$stage = ['translated', $row];
}
}
// save last item
$this->_addMessage($messages, $item);
fclose($stream);
return $messages;
}
/**
* Saves a translation item to the messages.
*
* @param array $messages The messages array being collected from the file
* @param array $item The current item being inspected
* @return void
*/
protected function _addMessage(array &$messages, array $item)
{
if (empty($item['ids']['singular']) && empty($item['ids']['plural'])) {
return;
}
$singular = stripcslashes($item['ids']['singular']);
$context = isset($item['context']) ? $item['context'] : null;
$translation = $item['translated'];
if (is_array($translation)) {
$translation = $translation[0];
}
$translation = stripcslashes($translation);
if ($context !== null && !isset($messages[$singular]['_context'][$context])) {
$messages[$singular]['_context'][$context] = $translation;
} elseif (!isset($messages[$singular]['_context'][''])) {
$messages[$singular]['_context'][''] = $translation;
}
if (isset($item['ids']['plural'])) {
$plurals = $item['translated'];
// PO are by definition indexed so sort by index.
ksort($plurals);
// Make sure every index is filled.
end($plurals);
$count = key($plurals);
// Fill missing spots with an empty string.
$empties = array_fill(0, $count + 1, '');
$plurals += $empties;
ksort($plurals);
$plurals = array_map('stripcslashes', $plurals);
$key = stripcslashes($item['ids']['plural']);
if ($context !== null) {
$messages[Translator::PLURAL_PREFIX . $key]['_context'][$context] = $plurals;
} else {
$messages[Translator::PLURAL_PREFIX . $key]['_context'][''] = $plurals;
}
}
}
}