Proyectos de Subversion Moodle

<?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();

}