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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Script to let a user edit the properties of a particular RSS feed.
*
* @package block_rss_client
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(__DIR__ . '/../../config.php');
require_once($CFG->libdir . '/formslib.php');
require_once($CFG->libdir .'/simplepie/moodle_simplepie.php');
class feed_edit_form extends moodleform {
protected $isadding;
protected $caneditshared;
protected $title = '';
protected $description = '';
function __construct($actionurl, $isadding, $caneditshared) {
$this->isadding = $isadding;
$this->caneditshared = $caneditshared;
parent::__construct($actionurl);
}
function definition() {
$mform =& $this->_form;
// Then show the fields about where this block appears.
$mform->addElement('header', 'rsseditfeedheader', get_string('feed', 'block_rss_client'));
$mform->addElement('text', 'url', get_string('feedurl', 'block_rss_client'), array('size' => 60));
$mform->setType('url', PARAM_URL);
$mform->addRule('url', null, 'required');
$mform->addElement('checkbox', 'autodiscovery', get_string('enableautodiscovery', 'block_rss_client'));
$mform->setDefault('autodiscovery', 1);
$mform->setAdvanced('autodiscovery');
$mform->addHelpButton('autodiscovery', 'enableautodiscovery', 'block_rss_client');
$mform->addElement('text', 'preferredtitle', get_string('customtitlelabel', 'block_rss_client'), array('size' => 60));
$mform->setType('preferredtitle', PARAM_NOTAGS);
if ($this->caneditshared) {
$mform->addElement('selectyesno', 'shared', get_string('sharedfeed', 'block_rss_client'));
$mform->setDefault('shared', 0);
}
$submitlabal = null; // Default
if ($this->isadding) {
$submitlabal = get_string('addnewfeed', 'block_rss_client');
}
$this->add_action_buttons(true, $submitlabal);
}
function definition_after_data(){
$mform =& $this->_form;
if($mform->getElementValue('autodiscovery')){
$mform->applyFilter('url', 'feed_edit_form::autodiscover_feed_url');
}
}
function validation($data, $files) {
$errors = parent::validation($data, $files);
$rss = new moodle_simplepie();
// set timeout for longer than normal to try and grab the feed
$rss->set_timeout(10);
$rss->set_feed_url($data['url']);
$rss->set_autodiscovery_cache_duration(0);
$rss->set_autodiscovery_level(SIMPLEPIE_LOCATOR_NONE);
$rss->init();
if ($rss->error()) {
$errors['url'] = get_string('couldnotfindloadrssfeed', 'block_rss_client');
} else {
$this->title = $rss->get_title();
$this->description = $rss->get_description();
}
return $errors;
}
function get_data() {
$data = parent::get_data();
if ($data) {
$data->title = '';
$data->description = '';
if($this->title){
$data->title = $this->title;
}
if($this->description){
$data->description = $this->description;
}
}
return $data;
}
/**
* Autodiscovers a feed url from a given url, to be used by the formslibs
* filter function
*
* Uses simplepie with autodiscovery set to maximum level to try and find
* a feed to subscribe to.
* See: http://simplepie.org/wiki/reference/simplepie/set_autodiscovery_level
*
* @param string URL to autodiscover a url
* @return string URL of feed or original url if none found
*/
public static function autodiscover_feed_url($url){
$rss = new moodle_simplepie();
$rss->set_feed_url($url);
$rss->set_autodiscovery_level(SIMPLEPIE_LOCATOR_ALL);
// When autodiscovering an RSS feed, simplepie will try lots of
// rss links on a page, so set the timeout high
$rss->set_timeout(20);
$rss->init();
if($rss->error()){
return $url;
}
// return URL without quoting..
$discoveredurl = new moodle_url($rss->subscribe_url());
return $discoveredurl->out(false);
}
}
$returnurl = optional_param('returnurl', '', PARAM_LOCALURL);
$courseid = optional_param('courseid', 0, PARAM_INT);
$rssid = optional_param('rssid', 0, PARAM_INT); // 0 mean create new.
if ($courseid == SITEID) {
$courseid = 0;
}
if ($courseid) {
$course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
$PAGE->set_course($course);
$context = $PAGE->context;
} else {
$context = context_system::instance();
$PAGE->set_context($context);
}
$managesharedfeeds = has_capability('block/rss_client:manageanyfeeds', $context);
if (!$managesharedfeeds) {
require_capability('block/rss_client:manageownfeeds', $context);
}
$urlparams = array('rssid' => $rssid);
if ($courseid) {
$urlparams['courseid'] = $courseid;
}
if ($returnurl) {
$urlparams['returnurl'] = $returnurl;
}
$managefeeds = new moodle_url('/blocks/rss_client/managefeeds.php', $urlparams);
$PAGE->set_url('/blocks/rss_client/editfeed.php', $urlparams);
$PAGE->set_pagelayout('admin');
if ($rssid) {
$isadding = false;
$rssrecord = $DB->get_record('block_rss_client', array('id' => $rssid), '*', MUST_EXIST);
} else {
$isadding = true;
$rssrecord = new stdClass;
}
$mform = new feed_edit_form($PAGE->url, $isadding, $managesharedfeeds);
$mform->set_data($rssrecord);
if ($mform->is_cancelled()) {
redirect($managefeeds);
} else if ($data = $mform->get_data()) {
$data->userid = $USER->id;
if (!$managesharedfeeds) {
$data->shared = 0;
}
if ($isadding) {
$DB->insert_record('block_rss_client', $data);
} else {
$data->id = $rssid;
$DB->update_record('block_rss_client', $data);
}
redirect($managefeeds);
} else {
if ($isadding) {
$strtitle = get_string('addnewfeed', 'block_rss_client');
} else {
$strtitle = get_string('editafeed', 'block_rss_client');
}
$PAGE->set_title($strtitle);
$PAGE->set_heading($strtitle);
$PAGE->navbar->add(get_string('blocks'));
$PAGE->navbar->add(get_string('pluginname', 'block_rss_client'));
$PAGE->navbar->add(get_string('managefeeds', 'block_rss_client'), $managefeeds );
$PAGE->navbar->add($strtitle);
echo $OUTPUT->header();
echo $OUTPUT->heading($strtitle, 2);
$mform->display();
echo $OUTPUT->footer();
}