<?php

/**

* This page allows a user to subscribe/unsubscribe other users from a booking option

* TODO: upgrade logging, add logging for added/deleted users

*

* @author David Bogner davidbogner@gmail.com

* @package mod/booking

*/

require_once(dirname(dirname(dirname(__FILE__))) . '/config.php');

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

$id = required_param('id', PARAM_INT); // course_module ID

$optionid = required_param('optionid', PARAM_INT); //

$subscribe = optional_param('subscribe', false, PARAM_BOOL);

$unsubscribe = optional_param('unsubscribe', false, PARAM_BOOL);

$agree = optional_param('agree', false, PARAM_BOOL);

$cm = get_coursemodule_from_id('booking', $id, 0, false, MUST_EXIST);

$course = get_course($cm->course);

(boolean) $subscribesuccess = false;

(boolean) $unsubscribesuccess = false;

$bookingoption = new booking_option($id, $optionid);

$bookingoption->apply_tags();

require_login($course, true, $cm);

/// Print the page header

$context = context_module::instance($cm->id);

$PAGE->set_context($context);

require_capability('mod/booking:subscribeusers', $context);

$url = new moodle_url('/mod/booking/subscribeusers.php', array('id' => $id, 'optionid' => $optionid));

$errorurl = new moodle_url('/mod/booking/view.php', array('id' => $id));

$PAGE->set_url($url);

$PAGE->set_title(get_string('modulename', 'booking'));

$PAGE->set_heading($COURSE->fullname);

$PAGE->navbar->add(get_string('booking:subscribeusers', 'booking'), $url);

if (!$agree && (!empty($bookingoption->booking->bookingpolicy))) {

echo $OUTPUT->header();

$alright = false;

$message = "<p><b>" . get_string('agreetobookingpolicy', 'booking') . ":</b></p>";

$message .= "<p>" . $bookingoption->booking->bookingpolicy . "<p>";

$continueurl = new moodle_url($PAGE->url->out(false, array('agree' => 1)));

$continue = new single_button($continueurl, get_string('continue'), 'get');

$cancel = new single_button($errorurl, get_string('cancel'), 'get');

;

echo $OUTPUT->confirm($message, $continue, $cancel);

echo $OUTPUT->footer();

die();

} else {

$currentgroup = groups_get_course_group($course);

if ($currentgroup) {

$groupmembers = groups_get_members($currentgroup, 'u.id');

}

$options = array('bookingid' => $cm->instance, 'currentgroup' => $currentgroup, 'accesscontext' => $context, 'optionid' => $optionid, 'cmid' => $cm->id, 'course' => $course, 'potentialusers' => $bookingoption->potentialusers);

$bookingoutput = $PAGE->get_renderer('mod_booking');

$existingoptions = $options;

$existingoptions['potentialusers'] = $bookingoption->bookedvisibleusers;

$existingselector = new booking_existing_user_selector('removeselect', $existingoptions);

$subscriberselector = new booking_potential_user_selector('addselect', $options);

if (data_submitted()) {

require_sesskey();

/** It has to be one or the other, not both or neither */

if (!($subscribe xor $unsubscribe)) {

//print_error('invalidaction');

}

if ($subscribe) {

$users = $subscriberselector->get_selected_users();

if ($currentgroup AND ! has_capability('moodle/site:accessallgroups', $context)) {

$usersofgroup = array_intersect_key($users, $groupmembers);

$usersallowed = (count($users) === count($usersofgroup));

} else {

$usersallowed = true;

}

// compare if selected users are members of the currentgroup if person has not the

// right to access all groups

$subscribesuccess = true;

$subscribedusers = array();

if ($usersallowed AND ( groups_is_member($currentgroup, $USER->id) OR has_capability('moodle/site:accessallgroups', $context))) {

foreach ($users as $user) {

if (!$bookingoption->user_submit_response($user)) {

$subscribesuccess = false;

print_error('bookingmeanwhilefull', 'booking', $errorurl->out(), $user->id);

}

$subscribedusers[] = $user->id;

}

} else {

print_error('invalidaction');

}

} else if ($unsubscribe && has_capability('mod/booking:deleteresponses', $context)) {

$users = $existingselector->get_selected_users();

$unsubscribesuccess = true;

foreach ($users as $user) {

if (!$bookingoption->user_delete_response($user->id)) {

$unsubscribesuccess = false;

print_error('cannotremovesubscriber', 'forum', $errorurl->out(), $user->id);

}

}

} else if ($unsubscribe && !has_capability('mod/booking:deleteresponses', $context)) {

print_error('nopermission', null, $errorurl->out());

}

$subscriberselector->invalidate_selected_users();

$existingselector->invalidate_selected_users();

$bookingoption->update_booked_users();

$subscriberselector->set_potential_users($bookingoption->potentialusers);

$existingselector->set_potential_users($bookingoption->bookedvisibleusers);

}

}

echo $OUTPUT->header();

echo html_writer::tag('div', html_writer::link(new moodle_url('/mod/booking/report.php', array('id' => $cm->id, 'optionid' => $optionid)), get_string('backtoresponses', 'booking') ), array('style' => 'width:100%; font-weight: bold; text-align: right;'));

if ($subscribesuccess || $unsubscribesuccess) {

if ($subscribesuccess) {

echo $OUTPUT->container(get_string('allchangessave', 'booking'), 'important', 'notice');

}

if ($unsubscribesuccess && has_capability('mod/booking:deleteresponses', $context)) {

echo $OUTPUT->container(get_string('allchangessave', 'booking'), 'important', 'notice');

};

}

echo $bookingoutput->subscriber_selection_form($existingselector, $subscriberselector);

echo $OUTPUT->footer();

?>