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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   * A scheduled task.
  19   *
  20   * @package    assignfeedback_editpdf
  21   * @copyright  2016 Damyon Wiese
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  namespace assignfeedback_editpdf\task;
  25  
  26  use core\task\scheduled_task;
  27  use assignfeedback_editpdf\document_services;
  28  use context_module;
  29  use assign;
  30  
  31  /**
  32   * Simple task to convert submissions to pdf in the background.
  33   * @copyright  2016 Damyon Wiese
  34   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  35   */
  36  class convert_submissions extends scheduled_task {
  37  
  38      /**
  39       * Get a descriptive name for this task (shown to admins).
  40       *
  41       * @return string
  42       */
  43      public function get_name() {
  44          return get_string('preparesubmissionsforannotation', 'assignfeedback_editpdf');
  45      }
  46  
  47      /**
  48       * Do the job.
  49       * Throw exceptions on errors (the job will be retried).
  50       */
  51      public function execute() {
  52          global $CFG, $DB;
  53  
  54          require_once($CFG->dirroot . '/mod/assign/locallib.php');
  55  
  56          $records = $DB->get_records('assignfeedback_editpdf_queue');
  57  
  58          $assignmentcache = array();
  59  
  60          foreach ($records as $record) {
  61              $submissionid = $record->submissionid;
  62              $submission = $DB->get_record('assign_submission', array('id' => $submissionid), '*', IGNORE_MISSING);
  63              if (!$submission) {
  64                  // Submission no longer exists.
  65                  $DB->delete_records('assignfeedback_editpdf_queue', array('id' => $record->id));
  66                  continue;
  67              }
  68  
  69              $assignmentid = $submission->assignment;
  70              $attemptnumber = $record->submissionattempt;
  71  
  72              if (empty($assignmentcache[$assignmentid])) {
  73                  $cm = get_coursemodule_from_instance('assign', $assignmentid, 0, false, MUST_EXIST);
  74                  $context = context_module::instance($cm->id);
  75  
  76                  $assignment = new assign($context, null, null);
  77                  $assignmentcache[$assignmentid] = $assignment;
  78              } else {
  79                  $assignment = $assignmentcache[$assignmentid];
  80              }
  81  
  82              $users = array();
  83              if ($submission->userid) {
  84                  array_push($users, $submission->userid);
  85              } else {
  86                  $members = $assignment->get_submission_group_members($submission->groupid, true);
  87  
  88                  foreach ($members as $member) {
  89                      array_push($users, $member->id);
  90                  }
  91              }
  92  
  93              mtrace('Convert ' . count($users) . ' submission attempt(s) for assignment ' . $assignmentid);
  94              foreach ($users as $userid) {
  95                  document_services::get_page_images_for_attempt($assignment,
  96                                                                 $userid,
  97                                                                 $attemptnumber,
  98                                                                 true);
  99                  document_services::get_page_images_for_attempt($assignment,
 100                                                                 $userid,
 101                                                                 $attemptnumber,
 102                                                                 false);
 103              }
 104  
 105              $DB->delete_records('assignfeedback_editpdf_queue', array('id' => $record->id));
 106          }
 107      }
 108  
 109  }