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Code Editor : managesubscriptions_form.php

<?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/>.

/**
 * Allows the user to manage calendar subscriptions.
 *
 * @copyright 2012 Jonathan Harker
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @package calendar
 */

if (!defined('MOODLE_INTERNAL')) {
    die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
}

require_once($CFG->libdir.'/formslib.php');

/**
 * Form for adding a subscription to a Moodle course calendar.
 * @copyright 2012 Jonathan Harker
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class calendar_addsubscription_form extends moodleform {

/**
     * Defines the form used to add calendar subscriptions.
     */
    public function definition() {
        $mform = $this->_form;
        $courseid = optional_param('course', 0, PARAM_INT);

$mform->addElement('header', 'addsubscriptionform', get_string('importcalendarheading', 'calendar'));

// Name.
        $mform->addElement('text', 'name', get_string('subscriptionname', 'calendar'), array('maxsize' => '255', 'size' => '40'));
        $mform->addRule('name', get_string('required'), 'required');
        $mform->setType('name', PARAM_TEXT);

// Import from (url | importfile).
        $mform->addElement('html', get_string('importfrominstructions', 'calendar'));
        $choices = array(CALENDAR_IMPORT_FROM_FILE => get_string('importfromfile', 'calendar'),
            CALENDAR_IMPORT_FROM_URL  => get_string('importfromurl',  'calendar'));
        $mform->addElement('select', 'importfrom', get_string('importcalendarfrom', 'calendar'), $choices);
        $mform->setDefault('importfrom', CALENDAR_IMPORT_FROM_URL);

// URL.
        $mform->addElement('text', 'url', get_string('importfromurl', 'calendar'), array('maxsize' => '255', 'size' => '50'));
        // Cannot set as PARAM_URL since we need to allow webcal:// protocol.
        $mform->setType('url', PARAM_RAW);

// Poll interval
        $choices = calendar_get_pollinterval_choices();
        $mform->addElement('select', 'pollinterval', get_string('pollinterval', 'calendar'), $choices);
        $mform->setDefault('pollinterval', 604800);
        $mform->addHelpButton('pollinterval', 'pollinterval', 'calendar');
        $mform->setType('pollinterval', PARAM_INT);

// Import file
        $mform->addElement('filepicker', 'importfile', get_string('importfromfile', 'calendar'), null, array('accepted_types' => '.ics'));

// Disable appropriate elements depending on import from value.
        $mform->disabledIf('pollinterval', 'importfrom', 'eq', CALENDAR_IMPORT_FROM_FILE);
        $mform->disabledIf('url',  'importfrom', 'eq', CALENDAR_IMPORT_FROM_FILE);
        $mform->disabledIf('importfile', 'importfrom', 'eq', CALENDAR_IMPORT_FROM_URL);

// Eventtype: 0 = user, 1 = global, anything else = course ID.
        list($choices, $groups) = calendar_get_eventtype_choices($courseid);
        $mform->addElement('select', 'eventtype', get_string('eventkind', 'calendar'), $choices);
        $mform->addRule('eventtype', get_string('required'), 'required');
        $mform->setType('eventtype', PARAM_ALPHA);

if (!empty($groups) and is_array($groups)) {
            $groupoptions = array();
            foreach ($groups as $group) {
                $groupoptions[$group->id] = $group->name;
            }
            $mform->addElement('select', 'groupid', get_string('typegroup', 'calendar'), $groupoptions);
            $mform->setType('groupid', PARAM_INT);
            $mform->disabledIf('groupid', 'eventtype', 'noteq', 'group');
        }

$mform->addElement('hidden', 'course');
        $mform->setType('course', PARAM_INT);
        $mform->addElement('submit', 'add', get_string('add'));
    }

/**
     * Validates the returned data.
     *
     * @param array $data
     * @param array $files
     * @return array
     */
    public function validation($data, $files) {
        global $USER;

$errors = parent::validation($data, $files);

if ($data['importfrom'] == CALENDAR_IMPORT_FROM_FILE) {
            if (empty($data['importfile'])) {
                $errors['importfile'] = get_string('errorrequiredurlorfile', 'calendar');
            } else {
                // Make sure the file area is not empty and contains only one file.
                $draftitemid = $data['importfile'];
                $fs = get_file_storage();
                $usercontext = context_user::instance($USER->id);
                $files = $fs->get_area_files($usercontext->id, 'user', 'draft', $draftitemid, 'id DESC', false);
                if (count($files) !== 1) {
                    $errors['importfile'] = get_string('errorrequiredurlorfile', 'calendar');
                }
            }
        } else if (($data['importfrom'] == CALENDAR_IMPORT_FROM_URL)) {
            // Clean input calendar url.
            $url = clean_param($data['url'], PARAM_URL);
            if (empty($url) || ($url !== $data['url'])) {
                $errors['url']  = get_string('invalidurl', 'error');
            }
        } else {
            // Shouldn't happen.
            $errors['url'] = get_string('errorrequiredurlorfile', 'calendar');
        }

return $errors;
    }

public function definition_after_data() {
        $mform =& $this->_form;

$mform->applyFilter('url', 'calendar_addsubscription_form::strip_webcal');
        $mform->applyFilter('url', 'trim');
    }

/**
     * Replace webcal:// urls with http:// as
     * curl does not understand this protocol
     *
     * @param string @url url to examine
     * @return string url with webcal:// replaced
     */
    public static function strip_webcal($url) {
        if (strpos($url, 'webcal://') === 0) {
            $url = str_replace('webcal://', 'http://', $url);
        }
        return $url;
    }
}

${this.title}

Code Editor : managesubscriptions_form.php