blog/external_blog_edit_form.php

   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' => 60), 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 }