blog/external_blog_edit_form.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18
  19 /**
  20  * Moodleform for the user interface for managing external blog links.
  21  *
  22  * @package    moodlecore
  23  * @subpackage blog
  24  * @copyright  2009 Nicolas Connault
  25  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  26  */
  27
  28 if (!defined('MOODLE_INTERNAL')) {
  29     die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
  30 }
  31
  32 require_once($CFG->libdir.'/formslib.php');
  33
  34 class blog_edit_external_form extends moodleform {
  35     public function definition() {
  36         global $CFG;
  37
  38         $mform =& $this->_form;
  39
  40         $mform->addElement('url', 'url', get_string('url', 'blog'), array('size' => 50));
  41         $mform->setType('url', PARAM_URL);
  42         $mform->addRule('url', get_string('emptyurl', 'blog'), 'required', null, 'client');
  43         $mform->addHelpButton('url', 'url', 'blog');
  44
  45         $mform->addElement('text', 'name', get_string('name', 'blog'));
  46         $mform->setType('name', PARAM_TEXT);
  47         $mform->addHelpButton('name', 'name', 'blog');
  48
  49         $mform->addElement('textarea', 'description', get_string('description', 'blog'), array('cols' => 50, 'rows' => 7));
  50         $mform->addHelpButton('description', 'description', 'blog');
  51
  52         if (!empty($CFG->usetags)) {
  53             $mform->addElement('text', 'filtertags', get_string('filtertags', 'blog'), array('size' => 50));
  54             $mform->setType('filtertags', PARAM_TAGLIST);
  55             $mform->addHelpButton('filtertags', 'filtertags', 'blog');
  56             $mform->addElement('text', 'autotags', get_string('autotags', 'blog'), array('size' => 50));
  57             $mform->setType('autotags', PARAM_TAGLIST);
  58             $mform->addHelpButton('autotags', 'autotags', 'blog');
  59         }
  60
  61         $this->add_action_buttons();
  62
  63         $mform->addElement('hidden', 'id');
  64         $mform->setType('id', PARAM_INT);
  65         $mform->setDefault('id', 0);
  66
  67         $mform->addElement('hidden', 'returnurl');
  68         $mform->setType('returnurl', PARAM_URL);
  69         $mform->setDefault('returnurl', 0);
  70     }
  71
  72     /**
  73      * Additional validation includes checking URL and tags
  74      */
  75     public function validation($data, $files) {
  76         global $CFG;
  77
  78         $errors = parent::validation($data, $files);
  79
  80         require_once($CFG->libdir . '/simplepie/moodle_simplepie.php');
  81
  82         $rss = new moodle_simplepie();
  83         $rssfile = $rss->registry->create('File', array($data['url']));
  84         $filetest = $rss->registry->create('Locator', array($rssfile));
  85
  86         if (!$filetest->is_feed($rssfile)) {
  87             $errors['url'] = get_string('feedisinvalid', 'blog');
  88         } else {
  89             $rss->set_feed_url($data['url']);
  90             if (!$rss->init()) {
  91                 $errors['url'] = get_string('emptyrssfeed', 'blog');
  92             }
  93         }
  94
  95         return $errors;
  96     }
  97
  98     public function definition_after_data() {
  99         global $CFG, $COURSE;
 100         $mform =& $this->_form;
 101
 102         $name = trim($mform->getElementValue('name'));
 103         $description = trim($mform->getElementValue('description'));
 104         $url = $mform->getElementValue('url');
 105
 106         if (empty($name) || empty($description)) {
 107             $rss = new moodle_simplepie($url);
 108
 109             if (empty($name) && $rss->get_title()) {
 110                 $mform->setDefault('name', $rss->get_title());
 111             }
 112
 113             if (empty($description) && $rss->get_description()) {
 114                 $mform->setDefault('description', $rss->get_description());
 115             }
 116         }
 117
 118         if ($id = $mform->getElementValue('id')) {
 119             $mform->setDefault('autotags', implode(',', tag_get_tags_array('blog_external', $id)));
 120             $mform->freeze('url');
 121             $mform->freeze('filtertags');
 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 }