<?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/>.

/**
 * This page shows all course enrolment options for current user.
 *
 * @package    core
 * @subpackage enrol
 * @copyright  2010 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

$id = required_param('id', PARAM_INT);

if (!isloggedin()) {
    // do not use require_login here because we are usually coming from it,
    // it would also mess up the SESSION->wantsurl
    redirect(get_login_url());
}

$course = $DB->get_record('course', array('id'=>$id), '*', MUST_EXIST);
$context = get_context_instance(CONTEXT_COURSE, $course->id, MUST_EXIST);

// Everybody is enrolled on the frontpage
if ($course->id == SITEID) {
    redirect("$CFG->wwwroot/");
}

$PAGE->set_course($course);
$PAGE->set_pagelayout('course');
$PAGE->set_url('/enrol/index.php', array('id'=>$course->id));

// do not allow enrols when in login-as session
if (session_is_loggedinas() and $USER->loginascontext->contextlevel == CONTEXT_COURSE) {
    print_error('loginasnoenrol', '', $CFG->wwwroot.'/course/view.php?id='.$USER->loginascontext->instanceid);
}

// get all enrol forms available in this course
$enrols = enrol_get_plugins(true);
$enrolinstances = enrol_get_instances($course->id, true);
$forms = array();
foreach($enrolinstances as $instance) {
    if (!isset($enrols[$instance->enrol])) {
        continue;
    }
    $form = $enrols[$instance->enrol]->enrol_page_hook($instance);
    if ($form) {
        $forms[$instance->id] = $form;
    }
}

// Check if user already enrolled
if (is_enrolled($context, $USER, '', true)) {
    if (!empty($SESSION->wantsurl)) {
        $destination = $SESSION->wantsurl;
        unset($SESSION->wantsurl);
    } else {
        $destination = "$CFG->wwwroot/course/view.php?id=$course->id";
    }
    redirect($destination);   // Bye!
}

$PAGE->set_title($course->shortname);
$PAGE->set_heading($course->fullname);
$PAGE->navbar->add(get_string('enrolmentoptions','enrol'));

echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('enrolmentoptions','enrol'));

echo $OUTPUT->box_start('generalbox info');

$summary = file_rewrite_pluginfile_urls($course->summary, 'pluginfile.php', $context->id, 'course', 'summary', null);
echo format_text($summary, $course->summaryformat, array('overflowdiv'=>true), $course->id);
if (!empty($CFG->coursecontact)) {
    $coursecontactroles = explode(',', $CFG->coursecontact);
    foreach ($coursecontactroles as $roleid) {
        $role = $DB->get_record('role', array('id'=>$roleid));
        $roleid = (int) $roleid;
        if ($users = get_role_users($roleid, $context, true)) {
            foreach ($users as $teacher) {
                $fullname = fullname($teacher, has_capability('moodle/site:viewfullnames', $context));
                $namesarray[] = format_string(role_get_name($role, $context)).': <a href="'.$CFG->wwwroot.'/user/view.php?id='.
                    $teacher->id.'&amp;course='.SITEID.'">'.$fullname.'</a>';
            }
        }
    }

    if (!empty($namesarray)) {
        echo "<ul class=\"teachers\">\n<li>";
        echo implode('</li><li>', $namesarray);
        echo "</li></ul>";
    }
}

echo $OUTPUT->box_end();


//TODO: find if future enrolments present and display some info

foreach ($forms as $form) {
    echo $form;
}

if (!$forms) {
    if (isguestuser()) {
        notice(get_string('noguestaccess', 'enrol'), get_login_url());
    } else {
        notice(get_string('notenrollable', 'enrol'), "$CFG->wwwroot/index.php");
    }
}

echo $OUTPUT->footer();
