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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    core
  21   * @copyright  2013 onwards Martin Dougiamas  http://dougiamas.com
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  namespace core\task;
  25  
  26  /**
  27   * Simple task to delete temp files older than 1 week.
  28   */
  29  class file_temp_cleanup_task extends scheduled_task {
  30  
  31      /**
  32       * Get a descriptive name for this task (shown to admins).
  33       *
  34       * @return string
  35       */
  36      public function get_name() {
  37          return get_string('tasktempfilecleanup', 'admin');
  38      }
  39  
  40      /**
  41       * Do the job.
  42       * Throw exceptions on errors (the job will be retried).
  43       */
  44      public function execute() {
  45          global $CFG;
  46  
  47          $tmpdir = $CFG->tempdir;
  48          // Default to last weeks time.
  49          $time = strtotime('-1 week');
  50  
  51          $dir = new \RecursiveDirectoryIterator($tmpdir);
  52          // Show all child nodes prior to their parent.
  53          $iter = new \RecursiveIteratorIterator($dir, \RecursiveIteratorIterator::CHILD_FIRST);
  54  
  55          for ($iter->rewind(); $iter->valid(); $iter->next()) {
  56              $node = $iter->getRealPath();
  57              if (!is_readable($node)) {
  58                  continue;
  59              }
  60              // Check if file or directory is older than the given time.
  61              if ($iter->getMTime() < $time) {
  62                  if ($iter->isDir() && !$iter->isDot()) {
  63                      // Don't attempt to delete the directory if it isn't empty.
  64                      if (!glob($node. DIRECTORY_SEPARATOR . '*')) {
  65                          if (@rmdir($node) === false) {
  66                              mtrace("Failed removing directory '$node'.");
  67                          }
  68                      }
  69                  }
  70                  if ($iter->isFile()) {
  71                      if (@unlink($node) === false) {
  72                          mtrace("Failed removing file '$node'.");
  73                      }
  74                  }
  75              }
  76          }
  77  
  78      }
  79  
  80  }