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Code Editor : edit_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/>.

/**
 * Adds new instance of enrol_self to specified course
 * or edits current instance.
 *
 * @package    enrol_self
 * @copyright  2010 Petr Skoda  {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

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

class enrol_self_edit_form extends moodleform {

function definition() {
        global $DB;

$mform = $this->_form;

list($instance, $plugin, $context) = $this->_customdata;

$mform->addElement('header', 'header', get_string('pluginname', 'enrol_self'));

$mform->addElement('text', 'name', get_string('custominstancename', 'enrol'));
        $mform->setType('name', PARAM_TEXT);

$options = array(ENROL_INSTANCE_ENABLED  => get_string('yes'),
                         ENROL_INSTANCE_DISABLED => get_string('no'));
        $mform->addElement('select', 'status', get_string('status', 'enrol_self'), $options);
        $mform->addHelpButton('status', 'status', 'enrol_self');

$options = array(1 => get_string('yes'), 0 => get_string('no'));
        $mform->addElement('select', 'customint6', get_string('newenrols', 'enrol_self'), $options);
        $mform->addHelpButton('customint6', 'newenrols', 'enrol_self');
        $mform->disabledIf('customint6', 'status', 'eq', ENROL_INSTANCE_DISABLED);

$mform->addElement('passwordunmask', 'password', get_string('password', 'enrol_self'));
        $mform->addHelpButton('password', 'password', 'enrol_self');
        if (empty($instance->id) and $plugin->get_config('requirepassword')) {
            $mform->addRule('password', get_string('required'), 'required', null, 'client');
        }

$options = array(1 => get_string('yes'),
                         0 => get_string('no'));
        $mform->addElement('select', 'customint1', get_string('groupkey', 'enrol_self'), $options);
        $mform->addHelpButton('customint1', 'groupkey', 'enrol_self');

$roles = $this->extend_assignable_roles($context, $instance->roleid);
        $mform->addElement('select', 'roleid', get_string('role', 'enrol_self'), $roles);

$mform->addElement('duration', 'enrolperiod', get_string('enrolperiod', 'enrol_self'), array('optional' => true, 'defaultunit' => 86400));
        $mform->addHelpButton('enrolperiod', 'enrolperiod', 'enrol_self');

$options = array(0 => get_string('no'), 1 => get_string('expirynotifyenroller', 'core_enrol'), 2 => get_string('expirynotifyall', 'core_enrol'));
        $mform->addElement('select', 'expirynotify', get_string('expirynotify', 'core_enrol'), $options);
        $mform->addHelpButton('expirynotify', 'expirynotify', 'core_enrol');

$mform->addElement('duration', 'expirythreshold', get_string('expirythreshold', 'core_enrol'), array('optional' => false, 'defaultunit' => 86400));
        $mform->addHelpButton('expirythreshold', 'expirythreshold', 'core_enrol');
        $mform->disabledIf('expirythreshold', 'expirynotify', 'eq', 0);

$mform->addElement('date_selector', 'enrolstartdate', get_string('enrolstartdate', 'enrol_self'), array('optional' => true));
        $mform->setDefault('enrolstartdate', 0);
        $mform->addHelpButton('enrolstartdate', 'enrolstartdate', 'enrol_self');

$mform->addElement('date_selector', 'enrolenddate', get_string('enrolenddate', 'enrol_self'), array('optional' => true));
        $mform->setDefault('enrolenddate', 0);
        $mform->addHelpButton('enrolenddate', 'enrolenddate', 'enrol_self');

$options = array(0 => get_string('never'),
                 1800 * 3600 * 24 => get_string('numdays', '', 1800),
                 1000 * 3600 * 24 => get_string('numdays', '', 1000),
                 365 * 3600 * 24 => get_string('numdays', '', 365),
                 180 * 3600 * 24 => get_string('numdays', '', 180),
                 150 * 3600 * 24 => get_string('numdays', '', 150),
                 120 * 3600 * 24 => get_string('numdays', '', 120),
                 90 * 3600 * 24 => get_string('numdays', '', 90),
                 60 * 3600 * 24 => get_string('numdays', '', 60),
                 30 * 3600 * 24 => get_string('numdays', '', 30),
                 21 * 3600 * 24 => get_string('numdays', '', 21),
                 14 * 3600 * 24 => get_string('numdays', '', 14),
                 7 * 3600 * 24 => get_string('numdays', '', 7));
        $mform->addElement('select', 'customint2', get_string('longtimenosee', 'enrol_self'), $options);
        $mform->addHelpButton('customint2', 'longtimenosee', 'enrol_self');

$mform->addElement('text', 'customint3', get_string('maxenrolled', 'enrol_self'));
        $mform->addHelpButton('customint3', 'maxenrolled', 'enrol_self');
        $mform->setType('customint3', PARAM_INT);

$cohorts = array(0 => get_string('no'));
        list($sqlparents, $params) = $DB->get_in_or_equal($context->get_parent_context_ids(), SQL_PARAMS_NAMED);
        $params['current'] = $instance->customint5;
        $sql = "SELECT id, name, idnumber, contextid
                  FROM {cohort}
                 WHERE contextid $sqlparents OR id = :current
              ORDER BY name ASC, idnumber ASC";
        $rs = $DB->get_recordset_sql($sql, $params);
        foreach ($rs as $c) {
            $ccontext = context::instance_by_id($c->contextid);
            if ($c->id != $instance->customint5 and !has_capability('moodle/cohort:view', $ccontext)) {
                continue;
            }
            $cohorts[$c->id] = format_string($c->name, true, array('context'=>$context));
            if ($c->idnumber) {
                $cohorts[$c->id] .= ' ['.s($c->idnumber).']';
            }
        }
        if (!isset($cohorts[$instance->customint5])) {
            // Somebody deleted a cohort, better keep the wrong value so that random ppl can not enrol.
            $cohorts[$instance->customint5] = get_string('unknowncohort', 'cohort', $instance->customint5);
        }
        $rs->close();
        if (count($cohorts) > 1) {
            $mform->addElement('select', 'customint5', get_string('cohortonly', 'enrol_self'), $cohorts);
            $mform->addHelpButton('customint5', 'cohortonly', 'enrol_self');
        } else {
            $mform->addElement('hidden', 'customint5');
            $mform->setType('customint5', PARAM_INT);
            $mform->setConstant('customint5', 0);
        }

$mform->addElement('advcheckbox', 'customint4', get_string('sendcoursewelcomemessage', 'enrol_self'));
        $mform->addHelpButton('customint4', 'sendcoursewelcomemessage', 'enrol_self');

$mform->addElement('textarea', 'customtext1', get_string('customwelcomemessage', 'enrol_self'), array('cols'=>'60', 'rows'=>'8'));
        $mform->addHelpButton('customtext1', 'customwelcomemessage', 'enrol_self');

$mform->addElement('hidden', 'id');
        $mform->setType('id', PARAM_INT);
        $mform->addElement('hidden', 'courseid');
        $mform->setType('courseid', PARAM_INT);

$this->add_action_buttons(true, ($instance->id ? null : get_string('addinstance', 'enrol')));

$this->set_data($instance);
    }

function validation($data, $files) {
        global $DB, $CFG;
        $errors = parent::validation($data, $files);

list($instance, $plugin, $context) = $this->_customdata;
        $checkpassword = false;

if ($instance->id) {
            if ($data['status'] == ENROL_INSTANCE_ENABLED) {
                if ($instance->password !== $data['password']) {
                    $checkpassword = true;
                }
            }
        } else {
            if ($data['status'] == ENROL_INSTANCE_ENABLED) {
                $checkpassword = true;
            }
        }

if ($checkpassword) {
            $require = $plugin->get_config('requirepassword');
            $policy  = $plugin->get_config('usepasswordpolicy');
            if ($require and trim($data['password']) === '') {
                $errors['password'] = get_string('required');
            } else if ($policy) {
                $errmsg = '';//prevent eclipse warning
                if (!check_password_policy($data['password'], $errmsg)) {
                    $errors['password'] = $errmsg;
                }
            }
        }

if ($data['status'] == ENROL_INSTANCE_ENABLED) {
            if (!empty($data['enrolenddate']) and $data['enrolenddate'] < $data['enrolstartdate']) {
                $errors['enrolenddate'] = get_string('enrolenddaterror', 'enrol_self');
            }
        }

if ($data['expirynotify'] > 0 and $data['expirythreshold'] < 86400) {
            $errors['expirythreshold'] = get_string('errorthresholdlow', 'core_enrol');
        }

return $errors;
    }

/**
    * Gets a list of roles that this user can assign for the course as the default for self-enrolment.
    *
    * @param context $context the context.
    * @param integer $defaultrole the id of the role that is set as the default for self-enrolment
    * @return array index is the role id, value is the role name
    */
    function extend_assignable_roles($context, $defaultrole) {
        global $DB;

$roles = get_assignable_roles($context, ROLENAME_BOTH);
        if (!isset($roles[$defaultrole])) {
            if ($role = $DB->get_record('role', array('id'=>$defaultrole))) {
                $roles[$defaultrole] = role_get_name($role, $context, ROLENAME_BOTH);
            }
        }
        return $roles;
    }
}

${this.title}

Code Editor : edit_form.php