<?php

///////////////////////////////////////////////////////////////////////////
//                                                                       //
// NOTICE OF COPYRIGHT                                                   //
//                                                                       //
// Moodle - Modular Object-Oriented Dynamic Learning Environment         //
//          http://moodle.org                                            //
//                                                                       //
// Copyright (C) 1999 onwards Martin Dougiamas  http://dougiamas.com     //
//                                                                       //
// This program 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 2 of the License, or     //
// (at your option) any later version.                                   //
//                                                                       //
// This program 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:                          //
//                                                                       //
//          http://www.gnu.org/copyleft/gpl.html                         //
//                                                                       //
///////////////////////////////////////////////////////////////////////////

/**
 * Forms associated with requesting courses, and having requests approved.
 * Note that several related forms are defined in this one file.
 *
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package course
 */

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

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

/**
 * A form for a user to request a course.
 */
class course_request_form extends moodleform {
    function definition() {
        global $CFG, $DB, $USER;

        $mform =& $this->_form;

        if ($pending = $DB->get_records('course_request', array('requester' => $USER->id))) {
            $mform->addElement('header', 'pendinglist', get_string('coursespending'));
            $list = array();
            foreach ($pending as $cp) {
                $list[] = format_string($cp->fullname);
            }
            $list = implode(', ', $list);
            $mform->addElement('static', 'pendingcourses', get_string('courses'), $list);
        }

        $mform->addElement('header','coursedetails', get_string('courserequestdetails'));

        $mform->addElement('text', 'fullname', get_string('fullnamecourse'), 'maxlength="254" size="50"');
        $mform->addHelpButton('fullname', 'fullnamecourse');
        $mform->addRule('fullname', get_string('missingfullname'), 'required', null, 'client');
        $mform->setType('fullname', PARAM_TEXT);

        $mform->addElement('text', 'shortname', get_string('shortnamecourse'), 'maxlength="100" size="20"');
        $mform->addHelpButton('shortname', 'shortnamecourse');
        $mform->addRule('shortname', get_string('missingshortname'), 'required', null, 'client');
        $mform->setType('shortname', PARAM_TEXT);

        if (!empty($CFG->requestcategoryselection)) {
            $displaylist = coursecat::make_categories_list();
            $mform->addElement('select', 'category', get_string('coursecategory'), $displaylist);
            $mform->setDefault('category', $CFG->defaultrequestcategory);
            $mform->addHelpButton('category', 'coursecategory');
        }

        $mform->addElement('editor', 'summary_editor', get_string('summary'), null, course_request::summary_editor_options());
        $mform->addHelpButton('summary_editor', 'coursesummary');
        $mform->setType('summary_editor', PARAM_RAW);

        $mform->addElement('header','requestreason', get_string('courserequestreason'));

        $mform->addElement('textarea', 'reason', get_string('courserequestsupport'), array('rows'=>'15', 'cols'=>'50'));
        $mform->addRule('reason', get_string('missingreqreason'), 'required', null, 'client');
        $mform->setType('reason', PARAM_TEXT);

        $this->add_action_buttons(true, get_string('requestcourse'));
    }

    function validation($data, $files) {
        global $DB;

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

        if (!empty($data['shortname'])) {
            $foundcourses = $DB->get_records('course', array('shortname'=>$data['shortname']));
            $foundreqcourses = $DB->get_records('course_request', array('shortname'=>$data['shortname']));
        }
        if (!empty($foundreqcourses)) {
            if (!empty($foundcourses)) {
                $foundcourses = array_merge($foundcourses, $foundreqcourses);
            } else {
                $foundcourses = $foundreqcourses;
            }
        }

        if (!empty($foundcourses)) {
            foreach ($foundcourses as $foundcourse) {
                if (!empty($foundcourse->requester)) {
                    $pending = 1;
                    $foundcoursenames[] = $foundcourse->fullname.' [*]';
                } else {
                    $foundcoursenames[] = $foundcourse->fullname;
                }
            }
            $foundcoursenamestring = implode(',', $foundcoursenames);

            $errors['shortname'] = get_string('shortnametaken', '', $foundcoursenamestring);
            if (!empty($pending)) {
                $errors['shortname'] .= get_string('starpending');
            }
        }

        return $errors;
    }
}

/**
 * A form for an administrator to reject a course request.
 */
class reject_request_form extends moodleform {
    function definition() {
        $mform =& $this->_form;

        $mform->addElement('hidden', 'reject', 0);
        $mform->setType('reject', PARAM_INT);

        $mform->addElement('header','coursedetails', get_string('coursereasonforrejecting'));

        $mform->addElement('textarea', 'rejectnotice', get_string('coursereasonforrejectingemail'), array('rows'=>'15', 'cols'=>'50'));
        $mform->addRule('rejectnotice', get_string('missingreqreason'), 'required', null, 'client');
        $mform->setType('rejectnotice', PARAM_TEXT);

        $this->add_action_buttons(true, get_string('reject'));
    }
}