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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Standard plugin entry points of the HTML question export format.
  19   *
  20   * @package   qformat_xhtml
  21   * @copyright 2013 The Open University
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  
  26  defined('MOODLE_INTERNAL') || die();
  27  
  28  
  29  /**
  30   * Serve question files when they are displayed in this export format.
  31   *
  32   * @param context $previewcontext the quiz context
  33   * @param int $questionid the question id.
  34   * @param context $filecontext the file (question) context
  35   * @param string $filecomponent the component the file belongs to.
  36   * @param string $filearea the file area.
  37   * @param array $args remaining file args.
  38   * @param bool $forcedownload.
  39   * @param array $options additional options affecting the file serving.
  40   */
  41  function qformat_xhtml_question_preview_pluginfile($previewcontext, $questionid,
  42          $filecontext, $filecomponent, $filearea, $args, $forcedownload, $options = array()) {
  43      global $CFG;
  44  
  45      list($context, $course, $cm) = get_context_info_array($previewcontext->id);
  46      require_login($course, false, $cm);
  47  
  48      question_require_capability_on($questionid, 'view');
  49  
  50      $fs = get_file_storage();
  51      $relativepath = implode('/', $args);
  52      $fullpath = "/{$filecontext->id}/{$filecomponent}/{$filearea}/{$relativepath}";
  53      if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
  54          send_file_not_found();
  55      }
  56  
  57      send_stored_file($file, 0, 0, $forcedownload, $options);
  58  }