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Developer Documentation


Long Term Support Release

  • Bug fixes for general core bugs in 3.1.x ended 8 May 2017 (12 months).
  • Bug fixes for security issues in 3.1.x ended 13 May 2019 (36 months).
  • minimum PHP 5.4.4 (always use latest PHP 5.4.x , 5.5.x or 5.6.x on Windows - http://windows.php.net/download/). PHP 7.0.x is supported but has some engine limitations. PHP 7.1.x is not supported.
  • Differences Between: [Versions 29 and 31] [Versions 30 and 31] [Versions 31 and 32] [Versions 31 and 33] [Versions 31 and 34] [Versions 31 and 35] [Versions 31 and 36] [Versions 31 and 37] [Versions 31 and 38]

       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  /**
      19   * Moodleform for the user interface for managing external blog links.
      20   *
      21   * @package    moodlecore
      22   * @subpackage blog
      23   * @copyright  2009 Nicolas Connault
      24   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
      25   */
      26  
      27  if (!defined('MOODLE_INTERNAL')) {
      28      die('Direct access to this script is forbidden.');    // It must be included from a Moodle page.
      29  }
      30  
      31  require_once($CFG->libdir.'/formslib.php');
      32  
      33  class blog_edit_external_form extends moodleform {
      34      public function definition() {
      35          global $CFG;
      36  
      37          $mform =& $this->_form;
      38  
      39          $mform->addElement('url', 'url', get_string('url', 'blog'), array('size' => 50), array('usefilepicker' => false));
      40          $mform->setType('url', PARAM_URL);
      41          $mform->addRule('url', get_string('emptyurl', 'blog'), 'required', null, 'client');
      42          $mform->addHelpButton('url', 'url', 'blog');
      43  
      44          $mform->addElement('text', 'name', get_string('name', 'blog'));
      45          $mform->setType('name', PARAM_TEXT);
      46          $mform->addHelpButton('name', 'name', 'blog');
      47  
      48          $mform->addElement('textarea', 'description', get_string('description', 'blog'), array('cols' => 50, 'rows' => 7));
      49          $mform->addHelpButton('description', 'description', 'blog');
      50  
      51          // To filter external blogs by their tags we do not need to check if tags in moodle are enabled.
      52          $mform->addElement('text', 'filtertags', get_string('filtertags', 'blog'), array('size' => 50));
      53          $mform->setType('filtertags', PARAM_TAGLIST);
      54          $mform->addHelpButton('filtertags', 'filtertags', 'blog');
      55  
      56          $mform->addElement('tags', 'autotags', get_string('autotags', 'blog'),
      57                  array('itemtype' => 'blog_external', 'component' => 'core'));
      58          $mform->addHelpButton('autotags', 'autotags', 'blog');
      59  
      60          $this->add_action_buttons();
      61  
      62          $mform->addElement('hidden', 'id');
      63          $mform->setType('id', PARAM_INT);
      64          $mform->setDefault('id', 0);
      65  
      66          $mform->addElement('hidden', 'returnurl');
      67          $mform->setType('returnurl', PARAM_URL);
      68          $mform->setDefault('returnurl', 0);
      69      }
      70  
      71      /**
      72       * Additional validation includes checking URL and tags
      73       */
      74      public function validation($data, $files) {
      75          global $CFG;
      76  
      77          $errors = parent::validation($data, $files);
      78  
      79          require_once($CFG->libdir . '/simplepie/moodle_simplepie.php');
      80  
      81          $rss = new moodle_simplepie();
      82          $rssfile = $rss->registry->create('File', array($data['url']));
      83          $filetest = $rss->registry->create('Locator', array($rssfile));
      84  
      85          if (!$filetest->is_feed($rssfile)) {
      86              $errors['url'] = get_string('feedisinvalid', 'blog');
      87          } else {
      88              $rss->set_feed_url($data['url']);
      89              if (!$rss->init()) {
      90                  $errors['url'] = get_string('emptyrssfeed', 'blog');
      91              }
      92          }
      93  
      94          return $errors;
      95      }
      96  
      97      public function definition_after_data() {
      98          global $CFG, $COURSE;
      99          $mform =& $this->_form;
     100  
     101          $name = trim($mform->getElementValue('name'));
     102          $description = trim($mform->getElementValue('description'));
     103          $url = $mform->getElementValue('url');
     104  
     105          if (empty($name) || empty($description)) {
     106              $rss = new moodle_simplepie($url);
     107  
     108              if (empty($name) && $rss->get_title()) {
     109                  $mform->setDefault('name', $rss->get_title());
     110              }
     111  
     112              if (empty($description) && $rss->get_description()) {
     113                  $mform->setDefault('description', $rss->get_description());
     114              }
     115          }
     116  
     117          if ($id = $mform->getElementValue('id')) {
     118              $mform->freeze('url');
     119              if ($mform->elementExists('filtertags')) {
     120                  $mform->freeze('filtertags');
     121              }
     122              // TODO change the filtertags element to a multiple select, using the tags of the external blog
     123              // Use $rss->get_channel_tags().
     124          }
     125      }
     126  }
    

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