lib.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/>.

/**
 * Meta+ course enrolment plugin.
 *
 * @package    enrol_metaplus
 * @copyright  2015 University of Kent
 * @author     Skylar Kelty
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

/**
 * Meta+ course enrolment plugin.
 *
 * @package    enrol_metaplus
 * @copyright  2015 University of Kent
 * @author     Skylar Kelty
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class enrol_metaplus_plugin extends enrol_plugin
{
    /**
     * Returns localised name of enrol instance
     *
     * @param stdClass $instance (null is accepted too)
     * @return string
     */
    public function get_instance_name($instance) {
        global $DB;

        if (empty($instance) || empty($instance->name)) {
            return get_string('pluginname', 'enrol_metaplus');
        } else {
            return format_string($instance->name);
        }
    }

    /**
     * Returns link to page which may be used to add new instance of enrolment plugin in course.
     *
     * @param int $courseid
     * @return moodle_url page url
     */
    public function get_newinstance_link($courseid) {
        $context = context_course::instance($courseid, MUST_EXIST);
        if (!has_capability('moodle/course:enrolconfig', $context) || !has_capability('enrol/meta:config', $context)) {
            return null;
        }

        // Multiple instances supported - multiple parent courses linked.
        return new moodle_url('/enrol/metaplus/addinstance.php', array(
            'id' => $courseid
        ));
    }

    /**
     * Does this plugin allow manual unenrolment of a specific user?
     * Yes, but only if user suspended...
     *
     * @param stdClass $instance course enrol instance
     * @param stdClass $ue record from user_enrolments table
     *
     * @return bool - true means user with 'enrol/xxx:unenrol' may unenrol this user, false means nobody may touch this user enrolment
     */
    public function allow_unenrol_user(stdClass $instance, stdClass $ue) {
        if ($ue->status == ENROL_USER_SUSPENDED) {
            return true;
        }

        return false;
    }

    /**
     * Gets an array of the user enrolment actions
     *
     * @param course_enrolment_manager $manager
     * @param stdClass $ue A user enrolment object
     * @return array An array of user_enrolment_actions
     */
    public function get_user_enrolment_actions(course_enrolment_manager $manager, $ue) {
        $actions = array();
        $context = $manager->get_context();
        $instance = $ue->enrolmentinstance;
        $params = $manager->get_moodlepage()->url->params();
        $params['ue'] = $ue->id;
        if ($this->allow_unenrol_user($instance, $ue) && has_capability('enrol/meta:unenrol', $context)) {
            $url = new moodle_url('/enrol/unenroluser.php', $params);
            $actions[] = new user_enrolment_action(new pix_icon('t/delete', ''), get_string('unenrol', 'enrol'), $url, array(
                'class' => 'unenrollink',
                'rel' => $ue->id
            ));
        }

        return $actions;
    }

    /**
     * Called after updating/inserting course.
     *
     * @param bool $inserted true if course just inserted
     * @param stdClass $course
     * @param stdClass $data form data
     * @return void
     */
    public function course_updated($inserted, $course, $data) {
        // Do nothing.
    }

    /**
     * Is it possible to delete enrol instance via standard UI?
     *
     * @param stdClass $instance
     * @return bool
     */
    public function can_delete_instance($instance) {
        $context = context_course::instance($instance->courseid);
        return has_capability('enrol/meta:config', $context);
    }

    /**
     * Is it possible to hide/show enrol instance via standard UI?
     *
     * @param stdClass $instance
     * @return bool
     */
    public function can_hide_show_instance($instance) {
        $context = context_course::instance($instance->courseid);
        return has_capability('enrol/meta:config', $context);
    }

    /**
     * Returns edit icons for the page with list of instances.
     * @param stdClass $instance
     * @return array
     */
    public function get_action_icons(stdClass $instance) {
        global $OUTPUT;

        if ($instance->enrol !== 'metaplus') {
            throw new coding_exception('invalid enrol instance!');
        }

        $context = context_course::instance($instance->courseid);
        $icons = array();
        if (has_capability('enrol/meta:config', $context)) {
            $editlink = new moodle_url("/enrol/metaplus/addinstance.php", array(
                'id' => $instance->courseid,
                'enrolid' => $instance->id
            ));

            $icons[] = $OUTPUT->action_icon($editlink, new pix_icon('t/edit', get_string('edit'), 'core', array(
                'class' => 'iconsmall'
            )));
        }

        return $icons;
    }
}