Gettext.php

<?php

/**
 * @file
 * Definition of Drupal\locale\Gettext.
 */
namespace Drupal\locale;

use Drupal\Component\Gettext\PoStreamReader;
use Drupal\Component\Gettext\PoMemoryWriter;
use Drupal\locale\PoDatabaseWriter;
use Exception;

/**
 * Static class providing Drupal specific Gettext functionality.
 *
 * The operations are related to pumping data from a source to a destination,
 * for example:
 * - Remote files http://*.po to memory
 * - File public://*.po to database
 */
class Gettext {

  /**
   * Reads the given Gettext PO files into a data structure.
   *
   * @param string $langcode
   *   Language code string.
   * @param array $files
   *   List of file objects with URI properties pointing to read.
   *
   * @return array
   *   Structured array as produced by a PoMemoryWriter.
   *
   * @see Drupal\Component\Gettext\PoMemoryWriter
   */
  static function filesToArray($langcode, array $files) {
    $writer = new PoMemoryWriter();
    $writer
      ->setLangcode($langcode);
    foreach ($files as $file) {
      $reader = new PoStreamReader();
      $reader
        ->setURI($file->uri);
      $reader
        ->setLangcode($langcode);
      $reader
        ->open();
      $writer
        ->writeItems($reader, -1);
    }
    return $writer
      ->getData();
  }

  /**
   * Reads the given PO files into the database.
   *
   * @param stdClass $file
   *   File object with an URI property pointing at the file's path.
   *
   * @param array $options
   *   An array with options that can have the following elements:
   *   - 'langcode': The language code, required.
   *   - 'overwrite_options': Overwrite options array as defined in
   *     Drupal\locale\PoDatabaseWriter. Optional, defaults to an empty array.
   *   - 'customized': Flag indicating whether the strings imported from $file
   *     are customized translations or come from a community source. Use
   *     LOCALE_CUSTOMIZED or LOCALE_NOT_CUSTOMIZED. Optional, defaults to
   *     LOCALE_NOT_CUSTOMIZED.
   *   - 'seek': Specifies from which position in the file should the reader
   *     start reading the next items. Optional, defaults to 0.
   *   - 'items': Specifies the number of items to read. Optional, defaults to
   *     -1, which means that all the items from the stream will be read.
   *
   * @return array
   *   Report array as defined in Drupal\locale\PoDatabaseWriter.
   *
   * @see Drupal\locale\PoDatabaseWriter
   */
  static function fileToDatabase($file, $options) {

    // Add the default values to the options array.
    $options += array(
      'overwrite_options' => array(),
      'customized' => LOCALE_NOT_CUSTOMIZED,
      'items' => -1,
      'seek' => 0,
    );

    // Instantiate and initialize the stream reader for this file.
    $reader = new PoStreamReader();
    $reader
      ->setLangcode($options['langcode']);
    $reader
      ->setURI($file->uri);
    try {
      $reader
        ->open();
    } catch (Exception $exception) {
      throw $exception;
    }
    $header = $reader
      ->getHeader();
    if (!$header) {
      throw new Exception('Missing or malformed header.');
    }

    // Initialize the database writer.
    $writer = new PoDatabaseWriter();
    $writer
      ->setLangcode($options['langcode']);
    $writer_options = array(
      'overwrite_options' => $options['overwrite_options'],
      'customized' => $options['customized'],
    );
    $writer
      ->setOptions($writer_options);
    $writer
      ->setHeader($header);

    // Attempt to pipe all items from the file to the database.
    try {
      if ($options['seek']) {
        $reader
          ->setSeek($options['seek']);
      }
      $writer
        ->writeItems($reader, $options['items']);
    } catch (Exception $exception) {
      throw $exception;
    }

    // Report back with an array of status information.
    $report = $writer
      ->getReport();

    // Add the seek position to the report. This is useful for the batch
    // operation.
    $report['seek'] = $reader
      ->getSeek();
    return $report;
  }

}