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/>.

/**

 * Self enrol plugin implementation.

 *

 * @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");

require_once($CFG->dirroot . '/enrol/locallib.php');

/**

 * Check if the given password match a group enrolment key in the specified course.

 *

 * @param  int $courseid            course id

 * @param  string $enrolpassword    enrolment password

 * @return bool                     True if match

 * @since  Moodle 3.0

 */

function enrol_self_check_group_enrolment_key($courseid, $enrolpassword) {

    global $DB;

    $found = false;

    $groups = $DB->get_records('groups', array('courseid' => $courseid), 'id ASC', 'id, enrolmentkey');

    foreach ($groups as $group) {

        if (empty($group->enrolmentkey)) {

            continue;

        }

        if ($group->enrolmentkey === $enrolpassword) {

            $found = true;

            break;

        }

    }

    return $found;

}

class enrol_self_enrol_form extends moodleform {

    protected $instance;

    protected $toomany = false;

    /**

     * Overriding this function to get unique form id for multiple self enrolments.

     *

     * @return string form identifier

     */

    protected function get_form_identifier() {

        $formid = $this->_customdata->id.'_'.get_class($this);

        return $formid;

    }

    public function definition() {

        global $USER, $OUTPUT, $CFG;

        $mform = $this->_form;

        $instance = $this->_customdata;

        $this->instance = $instance;

        $plugin = enrol_get_plugin('self');

        $heading = $plugin->get_instance_name($instance);

        $mform->addElement('header', 'selfheader', $heading);

        if ($instance->password) {

            // Change the id of self enrolment key input as there can be multiple self enrolment methods.

            $mform->addElement('password', 'enrolpassword', get_string('password', 'enrol_self'),

                    array('id' => 'enrolpassword_'.$instance->id));

            $context = context_course::instance($this->instance->courseid);

            $userfieldsapi = \core_user\fields::for_userpic();

            $ufields = $userfieldsapi->get_sql('u', false, '', '', false)->selects;

            $keyholders = get_users_by_capability($context, 'enrol/self:holdkey', $ufields);

            $keyholdercount = 0;

            foreach ($keyholders as $keyholder) {

                $keyholdercount++;

                if ($keyholdercount === 1) {

                    $mform->addElement('static', 'keyholder', '', get_string('keyholder', 'enrol_self'));

                }

                $keyholdercontext = context_user::instance($keyholder->id);

                if ($USER->id == $keyholder->id || has_capability('moodle/user:viewdetails', context_system::instance()) ||

                        has_coursecontact_role($keyholder->id)) {

                    $profilelink = '<a href="' . $CFG->wwwroot . '/user/view.php?id=' . $keyholder->id . '&amp;course=' .

                    $this->instance->courseid . '">' . fullname($keyholder) . '</a>';

                } else {

                    $profilelink = fullname($keyholder);

                }

                $profilepic = $OUTPUT->user_picture($keyholder, array('size' => 35, 'courseid' => $this->instance->courseid));

                $mform->addElement('static', 'keyholder'.$keyholdercount, '', $profilepic . $profilelink);

            }

        } else {

            $mform->addElement('static', 'nokey', '', get_string('nopassword', 'enrol_self'));

        }

        $this->add_action_buttons(false, get_string('enrolme', 'enrol_self'));

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

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

        $mform->setDefault('id', $instance->courseid);

        $mform->addElement('hidden', 'instance');

        $mform->setType('instance', PARAM_INT);

        $mform->setDefault('instance', $instance->id);

    }

    public function validation($data, $files) {

        global $DB, $CFG;

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

        $instance = $this->instance;

        if ($this->toomany) {

            $errors['notice'] = get_string('error');

            return $errors;

        }

        if ($instance->password) {

            if ($data['enrolpassword'] !== $instance->password) {

                if ($instance->customint1) {

                    // Check group enrolment key.

                    if (!enrol_self_check_group_enrolment_key($instance->courseid, $data['enrolpassword'])) {

                        // We can not hint because there are probably multiple passwords.

                        $errors['enrolpassword'] = get_string('passwordinvalid', 'enrol_self');

                    }

                } else {

                    $plugin = enrol_get_plugin('self');

                    if ($plugin->get_config('showhint')) {

                        $hint = core_text::substr($instance->password, 0, 1);

                        $errors['enrolpassword'] = get_string('passwordinvalidhint', 'enrol_self', $hint);

                    } else {

                        $errors['enrolpassword'] = get_string('passwordinvalid', 'enrol_self');

                    }

                }

            }

        }

        return $errors;

    }

}