PoFileLoader.php in Zircon Profile 8

Namespace

Symfony\Component\Translation\Loader

File

vendor/symfony/translation/Loader/PoFileLoader.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[e-mail]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\Translation\Loader;

use Symfony\Component\Translation\Exception\InvalidResourceException;
use Symfony\Component\Translation\Exception\NotFoundResourceException;
use Symfony\Component\Config\Resource\FileResource;

/**
 * @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/)
 * @copyright Copyright (c) 2012, Clemens Tolboom
 */
class PoFileLoader extends ArrayLoader {
  public function load($resource, $locale, $domain = 'messages') {
    if (!stream_is_local($resource)) {
      throw new InvalidResourceException(sprintf('This is not a local file "%s".', $resource));
    }
    if (!file_exists($resource)) {
      throw new NotFoundResourceException(sprintf('File "%s" not found.', $resource));
    }
    $messages = $this
      ->parse($resource);

    // empty file
    if (null === $messages) {
      $messages = array();
    }

    // not an array
    if (!is_array($messages)) {
      throw new InvalidResourceException(sprintf('The file "%s" must contain a valid po file.', $resource));
    }
    $catalogue = parent::load($messages, $locale, $domain);
    if (class_exists('Symfony\\Component\\Config\\Resource\\FileResource')) {
      $catalogue
        ->addResource(new FileResource($resource));
    }
    return $catalogue;
  }

  /**
   * Parses portable object (PO) format.
   *
   * From http://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.
   * - No support for comments spanning multiple lines.
   * - 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 resource $resource
   *
   * @return array
   */
  private function parse($resource) {
    $stream = fopen($resource, 'r');
    $defaults = array(
      'ids' => array(),
      'translated' => null,
    );
    $messages = array();
    $item = $defaults;
    while ($line = fgets($stream)) {
      $line = trim($line);
      if ($line === '') {

        // Whitespace indicated current item is done
        $this
          ->addMessage($messages, $item);
        $item = $defaults;
      }
      elseif (substr($line, 0, 7) === 'msgid "') {

        // We start a new msg so save previous
        // TODO: this fails when comments or contexts are added
        $this
          ->addMessage($messages, $item);
        $item = $defaults;
        $item['ids']['singular'] = substr($line, 7, -1);
      }
      elseif (substr($line, 0, 8) === 'msgstr "') {
        $item['translated'] = substr($line, 8, -1);
      }
      elseif ($line[0] === '"') {
        $continues = isset($item['translated']) ? 'translated' : 'ids';
        if (is_array($item[$continues])) {
          end($item[$continues]);
          $item[$continues][key($item[$continues])] .= substr($line, 1, -1);
        }
        else {
          $item[$continues] .= substr($line, 1, -1);
        }
      }
      elseif (substr($line, 0, 14) === 'msgid_plural "') {
        $item['ids']['plural'] = substr($line, 14, -1);
      }
      elseif (substr($line, 0, 7) === 'msgstr[') {
        $size = strpos($line, ']');
        $item['translated'][(int) substr($line, 7, 1)] = substr($line, $size + 3, -1);
      }
    }

    // save last item
    $this
      ->addMessage($messages, $item);
    fclose($stream);
    return $messages;
  }

  /**
   * Save a translation item to the messages.
   *
   * A .po file could contain by error missing plural indexes. We need to
   * fix these before saving them.
   *
   * @param array $messages
   * @param array $item
   */
  private function addMessage(array &$messages, array $item) {
    if (is_array($item['translated'])) {
      $messages[stripcslashes($item['ids']['singular'])] = stripcslashes($item['translated'][0]);
      if (isset($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 '-'.
        $empties = array_fill(0, $count + 1, '-');
        $plurals += $empties;
        ksort($plurals);
        $messages[stripcslashes($item['ids']['plural'])] = stripcslashes(implode('|', $plurals));
      }
    }
    elseif (!empty($item['ids']['singular'])) {
      $messages[stripcslashes($item['ids']['singular'])] = stripcslashes($item['translated']);
    }
  }

}

Classes

Name	Description
PoFileLoader	@copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/) @copyright Copyright (c) 2012, Clemens Tolboom