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moodle/calendar/event.php

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<?php // $Id$
/////////////////////////////////////////////////////////////////////////////
// //
// NOTICE OF COPYRIGHT //
// //
// Moodle - Calendar extension //
// //
// Copyright (C) 2003-2004 Greek School Network www.sch.gr //
// //
// Designed by: //
// Avgoustos Tsinakos (tsinakos@uom.gr) //
// Jon Papaioannou (pj@uom.gr) //
// //
// Programming and development: //
// Jon Papaioannou (pj@uom.gr) //
// //
// For bugs, suggestions, etc contact: //
// Jon Papaioannou (pj@uom.gr) //
// //
// The current module was developed at the University of Macedonia //
// (www.uom.gr) under the funding of the Greek School Network (www.sch.gr) //
// The aim of this project is to provide additional and improved //
// functionality to the Asynchronous Distance Education service that the //
// Greek School Network deploys. //
// //
// This program 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 2 of the License, or //
// (at your option) any later version. //
// //
// This program 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: //
// //
// http://www.gnu.org/copyleft/gpl.html //
// //
/////////////////////////////////////////////////////////////////////////////
require_once('../config.php');
require_once($CFG->dirroot.'/calendar/lib.php');
require_once($CFG->dirroot.'/course/lib.php');
require_once($CFG->dirroot.'/mod/forum/lib.php');
require_login();
if(isguest()) {
// Guests cannot do anything with events
redirect(CALENDAR_URL.'view.php?view=upcoming');
}
$action = required_param('action', PARAM_ALPHA);
$eventid = optional_param('id', 0, PARAM_INT);
$eventtype = optional_param('type', 'select', PARAM_ALPHA);
$urlcourse = optional_param('course', 0, PARAM_INT);
$cal_y = optional_param('cal_y');
$cal_m = optional_param('cal_m');
$cal_d = optional_param('cal_d');
if(!$site = get_site()) {
redirect($CFG->wwwroot.'/'.$CFG->admin.'/index.php');
}
$strcalendar = get_string('calendar', 'calendar');
$now = usergetdate(time());
$nav = calendar_get_link_tag($strcalendar, CALENDAR_URL.'view.php?view=upcoming&amp;', $now['mday'], $now['mon'], $now['year']);
$day = intval($now['mday']);
$mon = intval($now['mon']);
$yr = intval($now['year']);
if ($usehtmleditor = can_use_richtext_editor()) {
$defaultformat = FORMAT_HTML;
} else {
$defaultformat = FORMAT_MOODLE;
}
// If a course has been supplied in the URL, change the filters to show that one
if($urlcourse > 0 && record_exists('course', 'id', $urlcourse)) {
if($urlcourse == SITEID) {
// If coming from the site page, show all courses
$SESSION->cal_courses_shown = calendar_get_default_courses(true);
calendar_set_referring_course(0);
}
else {
// Otherwise show just this one
$SESSION->cal_courses_shown = $urlcourse;
calendar_set_referring_course($SESSION->cal_courses_shown);
}
}
switch($action) {
case 'delete':
$title = get_string('deleteevent', 'calendar');
$event = get_record('event', 'id', $eventid);
if($event === false) {
error('Invalid event');
}
if(!calendar_edit_event_allowed($event)) {
error('You are not authorized to do this');
}
break;
case 'edit':
$title = get_string('editevent', 'calendar');
$event = get_record('event', 'id', $eventid);
$repeats = optional_param('repeats', 0, PARAM_INT);
if($event === false) {
error('Invalid event');
}
if(!calendar_edit_event_allowed($event)) {
error('You are not authorized to do this');
}
if($form = data_submitted()) {
$form->name = clean_param(strip_tags($form->name,'<lang><span>'), PARAM_CLEAN);
$form->timestart = make_timestamp($form->startyr, $form->startmon, $form->startday, $form->starthr, $form->startmin);
if($form->duration == 1) {
$form->timeduration = make_timestamp($form->endyr, $form->endmon, $form->endday, $form->endhr, $form->endmin) - $form->timestart;
if($form->timeduration < 0) {
$form->timeduration = 0;
}
}
else if($form->duration == 2) {
$form->timeduration = $form->minutes * MINSECS;
}
else {
$form->timeduration = 0;
}
validate_form($form, $err);
if (count($err) == 0) {
if($event->repeatid && $repeats) {
// Update all
if($form->timestart >= $event->timestart) {
$timestartoffset = 'timestart + '.($form->timestart - $event->timestart);
}
else {
$timestartoffset = 'timestart - '.($event->timestart - $form->timestart);
}
execute_sql('UPDATE '.$CFG->prefix.'event SET '.
'name = '.$db->qstr($form->name).','.
'description = '.$db->qstr($form->description).','.
'timestart = '.$timestartoffset.','.
'timeduration = '.$form->timeduration.','.
'timemodified = '.time().' WHERE repeatid = '.$event->repeatid);
/// Log the event update.
$form->name = stripslashes($form->name); //To avoid double-slashes
add_to_log($form->courseid, 'calendar', 'edit all', 'event.php?action=edit&amp;id='.$form->id, $form->name);
}
else {
// Update this
$form->timemodified = time();
update_record('event', $form);
/// Log the event update.
$form->name = stripslashes($form->name); //To avoid double-slashes
add_to_log($form->courseid, 'calendar', 'edit', 'event.php?action=edit&amp;id='.$form->id, $form->name);
}
// OK, now redirect to day view
redirect(CALENDAR_URL.'view.php?view=day&cal_d='.$form->startday.'&cal_m='.$form->startmon.'&cal_y='.$form->startyr);
}
else {
foreach ($err as $key => $value) {
$focus = 'form.'.$key;
}
}
}
break;
case 'new':
$title = get_string('newevent', 'calendar');
$form = data_submitted();
if(!empty($form) && !empty($form->name)) {
$form->name = clean_text(strip_tags($form->name, '<lang><span>'));
$form->timestart = make_timestamp($form->startyr, $form->startmon, $form->startday, $form->starthr, $form->startmin);
if($form->duration == 1) {
$form->timeduration = make_timestamp($form->endyr, $form->endmon, $form->endday, $form->endhr, $form->endmin) - $form->timestart;
if($form->timeduration < 0) {
$form->timeduration = 0;
}
}
else if ($form->duration == 2) {
$form->timeduration = $form->minutes * MINSECS;
}
else {
$form->timeduration = 0;
}
if(!calendar_add_event_allowed($form)) {
error('You are not authorized to do this');
}
validate_form($form, $err);
if (count($err) == 0) {
$form->timemodified = time();
if ($form->repeat) {
$fetch = get_record_sql('SELECT 1, MAX(repeatid) AS repeatid FROM '.$CFG->prefix.'event');
$form->repeatid = empty($fetch) ? 1 : $fetch->repeatid + 1;
}
/// Get the event id for the log record.
$eventid = insert_record('event', $form, true);
/// Log the event entry.
add_to_log($form->courseid, 'calendar', 'add', 'event.php?action=edit&amp;id='.$eventid, stripslashes($form->name));
if ($form->repeat) {
for($i = 1; $i < $form->repeats; $i++) {
// What's the DST offset for the previous repeat?
$dst_offset_prev = dst_offset_on($form->timestart);
$form->timestart += WEEKSECS;
// If the offset has changed in the meantime, update this repeat accordingly
$form->timestart += $dst_offset_prev - dst_offset_on($form->timestart);
/// Get the event id for the log record.
$eventid = insert_record('event', $form, true);
/// Log the event entry.
add_to_log($form->courseid, 'calendar', 'add', 'event.php?action=edit&amp;id='.$eventid, stripslashes($form->name));
}
}
// OK, now redirect to day view
redirect(CALENDAR_URL.'view.php?view=day&cal_d='.$form->startday.'&cal_m='.$form->startmon.'&cal_y='.$form->startyr);
}
else {
foreach ($err as $key => $value) {
$focus = 'form.'.$key;
}
}
}
break;
}
if(empty($focus)) $focus = '';
// Let's see if we are supposed to provide a referring course link
// but NOT for the "main page" course
if($SESSION->cal_course_referer != SITEID &&
($shortname = get_field('course', 'shortname', 'id', $SESSION->cal_course_referer)) !== false) {
// If we know about the referring course, show a return link
$nav = '<a href="'.$CFG->wwwroot.'/course/view.php?id='.$SESSION->cal_course_referer.'">'.$shortname.'</a> -> '.$nav;
}
if (!empty($SESSION->cal_course_referer)) {
// TODO: This is part of the Great $course Hack in Moodle. Replace it at some point.
$course = get_record('course', 'id', $SESSION->cal_course_referer);
} else {
$course = $site;
}
print_header($site->shortname.': '.$strcalendar.': '.$title, $strcalendar, $nav.' -> '.$title,
'eventform.name', '', true, 'new.name', user_login_string($site));
echo calendar_overlib_html();
echo '<table id="calendar">';
echo '<tr><td class="maincalendar">';
switch($action) {
case 'delete':
$confirm = optional_param('confirm', 0, PARAM_INT);
$repeats = optional_param('repeats', 0, PARAM_INT);
if($confirm) {
// Kill it and redirect to day view
if(($event = get_record('event', 'id', $eventid)) !== false) {
if($event->repeatid && $repeats) {
delete_records('event', 'repeatid', $event->repeatid);
add_to_log($event->courseid, 'calendar', 'delete all', '', $event->name);
}
else {
delete_records('event', 'id', $eventid);
add_to_log($event->courseid, 'calendar', 'delete', '', $event->name);
}
}
redirect(CALENDAR_URL.'view.php?view=day&cal_d='.$_REQUEST['d'].'&cal_m='.$_REQUEST['m'].'&cal_y='.$_REQUEST['y']);
}
else {
$eventtime = usergetdate($event->timestart);
$m = $eventtime['mon'];
$d = $eventtime['mday'];
$y = $eventtime['year'];
if($event->repeatid) {
$fetch = get_record_sql('SELECT 1, COUNT(id) AS repeatcount FROM '.$CFG->prefix.'event WHERE repeatid = '.$event->repeatid);
$repeatcount = $fetch->repeatcount;
}
else {
$repeatcount = 0;
}
// Display confirmation form
echo '<div class="header">'.get_string('deleteevent', 'calendar').': '.$event->name.'</div>';
echo '<h2>'.get_string('confirmeventdelete', 'calendar').'</h2>';
if($repeatcount > 1) {
echo '<p>'.get_string('youcandeleteallrepeats', 'calendar', $repeatcount).'</p>';
}
echo '<div class="eventlist">';
$event->time = calendar_format_event_time($event, time(), '', false);
calendar_print_event($event);
echo '</div>';
include('event_delete.html');
}
break;
case 'edit':
if(empty($form)) {
$form->name = $event->name;
$form->courseid = $event->courseid; // Not to update, but for date validation
$form->description = $event->description;
$form->timestart = $event->timestart;
$form->timeduration = $event->timeduration;
$form->id = $event->id;
$form->format = $defaultformat;
if($event->timeduration > HOURSECS) {
// More than one hour, so default to normal duration mode
$form->duration = 1;
$form->minutes = '';
}
else if($event->timeduration) {
// Up to one hour, "minutes" mode probably is better here
$form->duration = 2;
$form->minutes = $event->timeduration / MINSECS;
}
else {
// No duration
$form->duration = 0;
$form->minutes = '';
}
}
if (!empty($form->courseid)) {
// TODO: This is part of the Great $course Hack in Moodle. Replace it at some point.
$course = get_record('course', 'id', $form->courseid);
} else {
$course = $site;
}
if($event->repeatid) {
$fetch = get_record_sql('SELECT 1, COUNT(id) AS repeatcount FROM '.$CFG->prefix.'event WHERE repeatid = '.$event->repeatid);
$repeatcount = $fetch->repeatcount;
}
else {
$repeatcount = 0;
}
echo '<div class="header">'.get_string('editevent', 'calendar').'</div>';
include('event_edit.html');
if ($usehtmleditor) {
use_html_editor("description");
}
break;
case 'new':
if($cal_y && $cal_m && $cal_d && checkdate($cal_m, $cal_d, $cal_y)) {
$form->timestart = make_timestamp($cal_y, $cal_m, $cal_d, 0, 0, 0);
}
else if($cal_y && $cal_m && checkdate($cal_m, 1, $cal_y)) {
if($cal_y == $now['year'] && $cal_m == $now['mon']) {
$form->timestart = make_timestamp($cal_y, $cal_m, $now['mday'], 0, 0, 0);
}
else {
$form->timestart = make_timestamp($cal_y, $cal_m, 1, 0, 0, 0);
}
}
if(!isset($form->timestart) or $form->timestart < 0) {
$form->timestart = time();
}
calendar_get_allowed_types($allowed);
if(!$allowed->groups && !$allowed->courses && !$allowed->site) {
// Take the shortcut
$eventtype = 'user';
}
$header = '';
switch($eventtype) {
case 'user':
$form->name = '';
$form->description = '';
$form->courseid = 0;
$form->groupid = 0;
$form->userid = $USER->id;
$form->modulename = '';
$form->eventtype = '';
$form->instance = 0;
$form->timeduration = 0;
$form->duration = 0;
$form->repeat = 0;
$form->repeats = '';
$form->minutes = '';
$form->type = 'user';
$header = get_string('typeuser', 'calendar');
break;
case 'group':
$groupid = optional_param('groupid', 0, PARAM_INT);
if(!($group = get_record('groups', 'id', $groupid) )) {
calendar_get_allowed_types($allowed);
$eventtype = 'select';
}
else {
$form->name = '';
$form->description = '';
$form->courseid = $group->courseid;
$form->groupid = $group->id;
$form->userid = $USER->id;
$form->modulename = '';
$form->eventtype = '';
$form->instance = 0;
$form->timeduration = 0;
$form->duration = 0;
$form->repeat = 0;
$form->repeats = '';
$form->minutes = '';
$form->type = 'group';
$header = get_string('typegroup', 'calendar');
}
break;
case 'course':
$courseid = optional_param('courseid', 0, PARAM_INT);
if(!record_exists('course', 'id', $courseid)) {
calendar_get_allowed_types($allowed);
$eventtype = 'select';
}
else {
$form->name = '';
$form->description = '';
$form->courseid = $courseid;
$form->groupid = 0;
$form->userid = $USER->id;
$form->modulename = '';
$form->eventtype = '';
$form->instance = 0;
$form->timeduration = 0;
$form->duration = 0;
$form->repeat = 0;
$form->repeats = '';
$form->minutes = '';
$form->type = 'course';
$header = get_string('typecourse', 'calendar');
}
break;
case 'site':
$form->name = '';
$form->description = '';
$form->courseid = SITEID;
$form->groupid = 0;
$form->userid = $USER->id;
$form->modulename = '';
$form->eventtype = '';
$form->instance = 0;
$form->timeduration = 0;
$form->duration = 0;
$form->repeat = 0;
$form->repeats = '';
$form->minutes = '';
$form->type = 'site';
$header = get_string('typesite', 'calendar');
break;
case 'select':
break;
default:
error('Unsupported event type');
}
$form->format = $defaultformat;
if(!empty($header)) {
$header = ' ('.$header.')';
}
echo '<div class="header">'.get_string('newevent', 'calendar').$header.'</div>';
if($eventtype == 'select') {
$courseid = optional_param('courseid', $SESSION->cal_course_referer, PARAM_INT);
if ($courseid == 0) { // workaround by Dan for bug #6130
$courseid = SITEID;
}
if (!$course = get_record('course', 'id', $courseid)) {
error('Incorrect course ID');
}
if ($groupmode = groupmode($course)) { // Groups are being used
$changegroup = optional_param('group', -1, PARAM_INT);
$groupid = get_and_set_current_group($course, $groupmode, $changegroup);
} else {
$groupid = 0;
}
echo '<h2>'.get_string('eventkind', 'calendar').':</h2>';
echo '<div id="selecteventtype">';
include('event_select.html');
echo '</div>';
}
else {
include('event_new.html');
if ($usehtmleditor) {
use_html_editor("description");
}
}
break;
}
echo '</td>';
// START: Last column (3-month display)
$defaultcourses = calendar_get_default_courses();
calendar_set_filters($courses, $groups, $users, $defaultcourses, $defaultcourses);
list($prevmon, $prevyr) = calendar_sub_month($mon, $yr);
list($nextmon, $nextyr) = calendar_add_month($mon, $yr);
echo '<td class="sidecalendar">';
echo '<div class="header">'.get_string('monthlyview', 'calendar').'</div>';
echo '<div class="filters">';
echo calendar_filter_controls('event', 'action='.$action.'&amp;type='.$eventtype.'&amp;id='.$eventid);
echo '</div>';
echo '<div class="minicalendarblock">';
echo calendar_top_controls('display', array('m' => $prevmon, 'y' => $prevyr));
echo calendar_get_mini($courses, $groups, $users, $prevmon, $prevyr);
echo '</div><div class="minicalendarblock">';
echo calendar_top_controls('display', array('m' => $mon, 'y' => $yr));
echo calendar_get_mini($courses, $groups, $users, $mon, $yr);
echo '</div><div class="minicalendarblock">';
echo calendar_top_controls('display', array('m' => $nextmon, 'y' => $nextyr));
echo calendar_get_mini($courses, $groups, $users, $nextmon, $nextyr);
echo '</div>';
echo '</td>';
echo '</tr></table>';
print_footer();
function validate_form(&$form, &$err) {
$form->name = trim($form->name);
$form->description = trim($form->description);
if(empty($form->name)) {
$err['name'] = get_string('errornoeventname', 'calendar');
}
if(empty($form->description)) {
$err['description'] = get_string('errornodescription', 'calendar');
}
if(!checkdate($form->startmon, $form->startday, $form->startyr)) {
$err['timestart'] = get_string('errorinvaliddate', 'calendar');
}
if($form->duration == 2 and !checkdate($form->endmon, $form->endday, $form->endyr)) {
$err['timeduration'] = get_string('errorinvaliddate', 'calendar');
}
if($form->duration == 2 and !($form->minutes > 0 and $form->minutes < 1000)) {
$err['minutes'] = get_string('errorinvalidminutes', 'calendar');
}
if (!empty($form->repeat) and !($form->repeats > 1 and $form->repeats < 100)) {
$err['repeats'] = get_string('errorinvalidrepeats', 'calendar');
}
if(!empty($form->courseid)) {
// Timestamps must be >= course startdate
$course = get_record('course', 'id', $form->courseid);
if($course === false) {
error('Event belongs to invalid course');
}
else if($form->timestart < $course->startdate) {
$err['timestart'] = get_string('errorbeforecoursestart', 'calendar');
}
}
}
function calendar_add_event_allowed($event) {
global $USER;
// can not be using guest account
if (empty($USER->id) or $USER->username == 'guest') {
return false;
}
$sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
// if user has manageentries at site level, always return true
if (has_capability('moodle/calendar:manageentries', $sitecontext)) {
return true;
}
switch ($event->type) {
case 'course':
return has_capability('moodle/calendar:manageentries', get_context_instance(CONTEXT_COURSE, $event->courseid));
case 'group':
if (!$group = get_record('groups', 'id', $event->groupid)) {
return false;
}
// this is ok because if you have this capability at course level, you should be able
// to edit group calendar too
// there is no need to check membership, because if you have this capability
// you will have a role in this group context
return has_capability('moodle/calendar:manageentries', get_context_instance(CONTEXT_GROUP, $group->id));
case 'user':
if ($event->userid == $USER->id) {
return (has_capability('moodle/calendar:manageownentries', $sitecontext));
}
//there is no 'break;' intentionally
case 'site':
default:
return false; // should already return true above if having moodle/calendar:manageentries
}
}
function calendar_get_allowed_types(&$allowed) {
global $USER, $CFG, $SESSION;
$allowed->user = true; // User events always allowed
$allowed->groups = false; // This may change just below
$allowed->courses = false; // This may change just below
$allowed->site = has_capability('moodle/calendar:manageentries', get_context_instance(CONTEXT_SYSTEM, SITEID));
if(!empty($SESSION->cal_course_referer) && $SESSION->cal_course_referer != SITEID && has_capability('moodle/calendar:manageentries', get_context_instance(CONTEXT_COURSE, $SESSION->cal_course_referer))) {
$course = get_record('course', 'id', $SESSION->cal_course_referer);
$allowed->courses = array($course->id => 1);
if($course->groupmode != NOGROUPS || !$course->groupmodeforce) {
$allowed->groups = get_groups($SESSION->cal_course_referer);
}
}
}
?>
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