mirrored from git://git.moodle.org/moodle.git
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lib.php
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lib.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@teikav.edu.gr) //
// Jon Papaioannou (pj@moodle.org) //
// //
// Programming and development: //
// Jon Papaioannou (pj@moodle.org) //
// //
// For bugs, suggestions, etc contact: //
// Jon Papaioannou (pj@moodle.org) //
// //
// 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 //
// //
/////////////////////////////////////////////////////////////////////////////
// These are read by the administration component to provide default values
define('CALENDAR_DEFAULT_UPCOMING_LOOKAHEAD', 21);
define('CALENDAR_DEFAULT_UPCOMING_MAXEVENTS', 10);
define('CALENDAR_DEFAULT_STARTING_WEEKDAY', 1);
// This is a packed bitfield: day X is "weekend" if $field & (1 << X) is true
// Default value = 65 = 64 + 1 = 2^6 + 2^0 = Saturday & Sunday
define('CALENDAR_DEFAULT_WEEKEND', 65);
// Fetch the correct values from admin settings/lang pack
// If no such settings found, use the above defaults
$firstday = isset($CFG->calendar_startwday) ? $CFG->calendar_startwday : get_string('firstdayofweek');
if(!is_numeric($firstday)) {
define ('CALENDAR_STARTING_WEEKDAY', CALENDAR_DEFAULT_STARTING_WEEKDAY);
}
else {
define ('CALENDAR_STARTING_WEEKDAY', intval($firstday) % 7);
}
define ('CALENDAR_UPCOMING_DAYS', isset($CFG->calendar_lookahead) ? intval($CFG->calendar_lookahead) : CALENDAR_DEFAULT_UPCOMING_LOOKAHEAD);
define ('CALENDAR_UPCOMING_MAXEVENTS', isset($CFG->calendar_maxevents) ? intval($CFG->calendar_maxevents) : CALENDAR_DEFAULT_UPCOMING_MAXEVENTS);
define ('CALENDAR_WEEKEND', isset($CFG->calendar_weekend) ? intval($CFG->calendar_weekend) : CALENDAR_DEFAULT_WEEKEND);
define ('CALENDAR_URL', $CFG->wwwroot.'/calendar/');
define ('CALENDAR_TF_24', '%H:%M');
define ('CALENDAR_TF_12', '%I:%M %p');
$CALENDARDAYS = array('sunday','monday','tuesday','wednesday','thursday','friday','saturday');
function calendar_get_mini($courses, $groups, $users, $cal_month = false, $cal_year = false) {
global $CFG, $USER;
$display = &New stdClass;
$display->minwday = get_user_preferences('calendar_startwday', CALENDAR_STARTING_WEEKDAY);
$display->maxwday = $display->minwday + 6;
$content = '';
if(!empty($cal_month) && !empty($cal_year)) {
$thisdate = usergetdate(time()); // Date and time the user sees at his location
if($cal_month == $thisdate['mon'] && $cal_year == $thisdate['year']) {
// Navigated to this month
$date = $thisdate;
$display->thismonth = true;
}
else {
// Navigated to other month, let's do a nice trick and save us a lot of work...
if(!checkdate($cal_month, 1, $cal_year)) {
$date = array('mday' => 1, 'mon' => $thisdate['mon'], 'year' => $thisdate['year']);
$display->thismonth = true;
}
else {
$date = array('mday' => 1, 'mon' => $cal_month, 'year' => $cal_year);
$display->thismonth = false;
}
}
}
else {
$date = usergetdate(time()); // Date and time the user sees at his location
$display->thismonth = true;
}
// Fill in the variables we 're going to use, nice and tidy
list($d, $m, $y) = array($date['mday'], $date['mon'], $date['year']); // This is what we want to display
$display->maxdays = calendar_days_in_month($m, $y);
if (get_user_timezone_offset() < 99) {
// We 'll keep these values as GMT here, and offset them when the time comes to query the db
$display->tstart = gmmktime(0, 0, 0, $m, 1, $y); // This is GMT
$display->tend = gmmktime(23, 59, 59, $m, $display->maxdays, $y); // GMT
} else {
// no timezone info specified
$display->tstart = mktime(0, 0, 0, $m, 1, $y);
$display->tend = mktime(23, 59, 59, $m, $display->maxdays, $y);
}
$startwday = dayofweek(1, $m, $y);
// Align the starting weekday to fall in our display range
// This is simple, not foolproof.
if($startwday < $display->minwday) {
$startwday += 7;
}
// TODO: THIS IS TEMPORARY CODE!
// [pj] I was just reading through this and realized that I when writing this code I was probably
// asking for trouble, as all these time manipulations seem to be unnecessary and a simple
// make_timestamp would accomplish the same thing. So here goes a test:
//$test_start = make_timestamp($y, $m, 1);
//$test_end = make_timestamp($y, $m, $display->maxdays, 23, 59, 59);
//if($test_start != usertime($display->tstart) - dst_offset_on($display->tstart)) {
//notify('Failed assertion in calendar/lib.php line 126; display->tstart = '.$display->tstart.', dst_offset = '.dst_offset_on($display->tstart).', usertime = '.usertime($display->tstart).', make_t = '.$test_start);
//}
//if($test_end != usertime($display->tend) - dst_offset_on($display->tend)) {
//notify('Failed assertion in calendar/lib.php line 130; display->tend = '.$display->tend.', dst_offset = '.dst_offset_on($display->tend).', usertime = '.usertime($display->tend).', make_t = '.$test_end);
//}
// Get the events matching our criteria. Don't forget to offset the timestamps for the user's TZ!
$whereclause = calendar_sql_where(
usertime($display->tstart) - dst_offset_on($display->tstart),
usertime($display->tend) - dst_offset_on($display->tend),
$users, $groups, $courses);
if($whereclause === false) {
$events = array();
}
else {
$events = get_records_select('event', $whereclause, 'timestart');
}
// This is either a genius idea or an idiot idea: in order to not complicate things, we use this rule: if, after
// possibly removing SITEID from $courses, there is only one course left, then clicking on a day in the month
// will also set the $SESSION->cal_courses_shown variable to that one course. Otherwise, we 'd need to add extra
// arguments to this function.
$morehref = '';
if(!empty($courses)) {
$courses = array_diff($courses, array(SITEID));
if(count($courses) == 1) {
$morehref = '&course='.reset($courses);
}
}
// We want to have easy access by day, since the display is on a per-day basis.
// Arguments passed by reference.
//calendar_events_by_day($events, $display->tstart, $eventsbyday, $durationbyday, $typesbyday);
calendar_events_by_day($events, $m, $y, $eventsbyday, $durationbyday, $typesbyday);
//Accessibility: added summary and <abbr> elements.
///global $CALENDARDAYS; appears to be broken.
$days_title = array('sunday','monday','tuesday','wednesday','thursday','friday','saturday');
$summary = get_string('calendarheading', 'calendar', userdate(make_timestamp($y, $m), get_string('strftimemonthyear')));
$summary = get_string('tabledata', 'access', $summary);
$content .= '<table class="minicalendar" summary="'.$summary.'">'; // Begin table
$content .= '<tr class="weekdays">'; // Header row: day names
// Print out the names of the weekdays
$days = array('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat');
for($i = $display->minwday; $i <= $display->maxwday; ++$i) {
// This uses the % operator to get the correct weekday no matter what shift we have
// applied to the $display->minwday : $display->maxwday range from the default 0 : 6
$content .= '<th scope="col"><abbr title="'. get_string($days_title[$i % 7], 'calendar') .'">'.
get_string($days[$i % 7], 'calendar') ."</abbr></th>\n";
}
$content .= '</tr><tr>'; // End of day names; prepare for day numbers
// For the table display. $week is the row; $dayweek is the column.
$dayweek = $startwday;
// Paddding (the first week may have blank days in the beginning)
for($i = $display->minwday; $i < $startwday; ++$i) {
$content .= '<td> </td>'."\n";
}
// Now display all the calendar
for($day = 1; $day <= $display->maxdays; ++$day, ++$dayweek) {
if($dayweek > $display->maxwday) {
// We need to change week (table row)
$content .= '</tr><tr>';
$dayweek = $display->minwday;
}
// Reset vars
$cell = '';
if(CALENDAR_WEEKEND & (1 << ($dayweek % 7))) {
// Weekend. This is true no matter what the exact range is.
$class = 'weekend day';
}
else {
// Normal working day.
$class = 'day';
}
// Special visual fx if an event is defined
if(isset($eventsbyday[$day])) {
$dayhref = calendar_get_link_href(CALENDAR_URL.'view.php?view=day'.$morehref.'&', $day, $m, $y);
// OverLib popup
$popupcontent = '';
foreach($eventsbyday[$day] as $eventid) {
if (!isset($events[$eventid])) {
continue;
}
$event = $events[$eventid];
if(!empty($event->modulename)) {
$popupicon = $CFG->modpixpath.'/'.$event->modulename.'/icon.gif';
$popupalt = $event->modulename;
} else if ($event->courseid == SITEID) { // Site event
$popupicon = $CFG->pixpath.'/c/site.gif';
$popupalt = '';
} else if ($event->courseid != 0 && $event->courseid != SITEID && $event->groupid == 0) { // Course event
$popupicon = $CFG->pixpath.'/c/course.gif';
$popupalt = '';
} else if ($event->groupid) { // Group event
$popupicon = $CFG->pixpath.'/c/group.gif';
$popupalt = '';
} else if ($event->userid) { // User event
$popupicon = $CFG->pixpath.'/c/user.gif';
$popupalt = '';
}
$popupcontent .= '<div><img class="icon" src="'.$popupicon.'" alt="'.$popupalt.'" /><a href="'.$dayhref.'#event_'.$event->id.'">'.format_string($event->name, true).'</a></div>';
}
//Accessibility: functionality moved to calendar_get_popup.
if($display->thismonth && $day == $d) {
$popup = calendar_get_popup(true, $events[$eventid]->timestart, $popupcontent);
} else {
$popup = calendar_get_popup(false, $events[$eventid]->timestart, $popupcontent);
}
// Class and cell content
if(isset($typesbyday[$day]['startglobal'])) {
$class .= ' event_global';
}
else if(isset($typesbyday[$day]['startcourse'])) {
$class .= ' event_course';
}
else if(isset($typesbyday[$day]['startgroup'])) {
$class .= ' event_group';
}
else if(isset($typesbyday[$day]['startuser'])) {
$class .= ' event_user';
}
$cell = '<a href="'.$dayhref.'" '.$popup.'>'.$day.'</a>';
}
else {
$cell = $day;
}
if(isset($typesbyday[$day]['durationglobal'])) {
$class .= ' duration_global';
}
else if(isset($typesbyday[$day]['durationcourse'])) {
$class .= ' duration_course';
}
else if(isset($typesbyday[$day]['durationgroup'])) {
$class .= ' duration_group';
}
else if(isset($typesbyday[$day]['durationuser'])) {
$class .= ' duration_user';
}
// Special visual fx for today
//Accessibility: hidden text for today, and popup.
if($display->thismonth && $day == $d) {
$class .= ' today';
$today = get_string('today', 'calendar').' '.userdate(time(), get_string('strftimedayshort'));
if(! isset($eventsbyday[$day])) {
$class .= ' eventnone';
$popup = calendar_get_popup(true, false);
$cell = '<a href="#" '.$popup.'>'.$day.'</a>';
}
$cell = '<span class="accesshide">'.$today.' </span>'.$cell;
}
// Just display it
if(!empty($class)) {
$class = ' class="'.$class.'"';
}
$content .= '<td'.$class.'>'.$cell."</td>\n";
}
// Paddding (the last week may have blank days at the end)
for($i = $dayweek; $i <= $display->maxwday; ++$i) {
$content .= '<td> </td>';
}
$content .= '</tr>'; // Last row ends
$content .= '</table>'; // Tabular display of days ends
return $content;
}
/**
* calendar_get_popup, called at multiple points in from calendar_get_mini.
* Copied and modified from calendar_get_mini.
* @uses OverLib popup.
* @param $is_today bool, false except when called on the current day.
* @param $event_timestart mixed, $events[$eventid]->timestart, OR false if there are no events.
* @param $popupcontent string.
* @return $popup string, contains onmousover and onmouseout events.
*/
function calendar_get_popup($is_today, $event_timestart, $popupcontent='') {
$popupcaption = '';
if($is_today) {
$popupcaption = get_string('today', 'calendar').' ';
}
if (false === $event_timestart) {
$popupcaption .= userdate(time(), get_string('strftimedayshort'));
$popupcontent = get_string('eventnone', 'calendar');
} else {
$popupcaption .= get_string('eventsfor', 'calendar', userdate($event_timestart, get_string('strftimedayshort')));
}
$popupcontent = str_replace("'", "\'", htmlspecialchars($popupcontent));
$popupcaption = str_replace("'", "\'", htmlspecialchars($popupcaption));
$popup = 'onmouseover="return overlib(\''.$popupcontent.'\', CAPTION, \''.$popupcaption.'\');" onmouseout="return nd();"';
return $popup;
}
function calendar_get_upcoming($courses, $groups, $users, $daysinfuture, $maxevents, $fromtime=0) {
global $CFG;
$display = &new stdClass;
$display->range = $daysinfuture; // How many days in the future we 'll look
$display->maxevents = $maxevents;
$output = array();
// Prepare "course caching", since it may save us a lot of queries
$coursecache = array();
$processed = 0;
$now = time(); // We 'll need this later
$usermidnighttoday = usergetmidnight($now);
if ($fromtime) {
$display->tstart = $fromtime;
} else {
$display->tstart = $usermidnighttoday;
}
// This works correctly with respect to the user's DST, but it is accurate
// only because $fromtime is always the exact midnight of some day!
$display->tend = usergetmidnight($display->tstart + DAYSECS * $display->range + 3 * HOURSECS) - 1;
// Get the events matching our criteria
$whereclause = calendar_sql_where($display->tstart, $display->tend, $users, $groups, $courses);
if ($whereclause === false) {
$events = false;
} else {
$events = get_records_select('event', $whereclause, 'timestart');
}
// This is either a genius idea or an idiot idea: in order to not complicate things, we use this rule: if, after
// possibly removing SITEID from $courses, there is only one course left, then clicking on a day in the month
// will also set the $SESSION->cal_courses_shown variable to that one course. Otherwise, we 'd need to add extra
// arguments to this function.
$morehref = '';
if(!empty($courses)) {
$courses = array_diff($courses, array(SITEID));
if(count($courses) == 1) {
$morehref = '&course='.reset($courses);
}
}
if($events !== false) {
foreach($events as $event) {
if($processed >= $display->maxevents) {
break;
}
$event->time = calendar_format_event_time($event, $now, $morehref);
$output[] = $event;
++$processed;
}
}
return $output;
}
function calendar_add_event_metadata($event) {
global $CFG;
//Support multilang in event->name
$event->name = format_string($event->name,true);
if(!empty($event->modulename)) { // Activity event
// The module name is set. I will assume that it has to be displayed, and
// also that it is an automatically-generated event. And of course that the
// fields for get_coursemodule_from_instance are set correctly.
$module = calendar_get_module_cached($coursecache, $event->modulename, $event->instance);
if ($module === false) {
return;
}
$modulename = get_string('modulename', $event->modulename);
$eventtype = get_string($event->eventtype, $event->modulename);
$icon = $CFG->modpixpath.'/'.$event->modulename.'/icon.gif';
$event->icon = '<img height="16" width="16" src="'.$icon.'" alt="'.$eventtype.'" title="'.$modulename.'" style="vertical-align: middle;" />';
$event->referer = '<a href="'.$CFG->wwwroot.'/mod/'.$event->modulename.'/view.php?id='.$module->id.'">'.$event->name.'</a>';
$event->courselink = '<a href="'.$CFG->wwwroot.'/course/view.php?id='.$module->course.'">'.$coursecache[$module->course]->fullname.'</a>';
$event->cmid = $module->id;
} else if($event->courseid == SITEID) { // Site event
$event->icon = '<img height="16" width="16" src="'.$CFG->pixpath.'/c/site.gif" alt="'.get_string('globalevent', 'calendar').'" style="vertical-align: middle;" />';
$event->cssclass = 'event_global';
} else if($event->courseid != 0 && $event->courseid != SITEID && $event->groupid == 0) { // Course event
calendar_get_course_cached($coursecache, $event->courseid);
$event->icon = '<img height="16" width="16" src="'.$CFG->pixpath.'/c/course.gif" alt="'.get_string('courseevent', 'calendar').'" style="vertical-align: middle;" />';
$event->courselink = '<a href="'.$CFG->wwwroot.'/course/view.php?id='.$event->courseid.'">'.$coursecache[$event->courseid]->fullname.'</a>';
$event->cssclass = 'event_course';
} else if ($event->groupid) { // Group event
$event->icon = '<img height="16" width="16" src="'.$CFG->pixpath.'/c/group.gif" alt="'.get_string('groupevent', 'calendar').'" style="vertical-align: middle;" />';
$event->cssclass = 'event_group';
} else if($event->userid) { // User event
$event->icon = '<img height="16" width="16" src="'.$CFG->pixpath.'/c/user.gif" alt="'.get_string('userevent', 'calendar').'" style="vertical-align: middle;" />';
$event->cssclass = 'event_user';
}
return $event;
}
function calendar_print_event($event) {
global $CFG, $USER;
static $strftimetime;
$event = calendar_add_event_metadata($event);
echo '<a name="event_'.$event->id.'"></a><table class="event" cellspacing="0">';
echo '<tr><td class="picture">';
if (!empty($event->icon)) {
echo $event->icon;
} else {
print_spacer(16,16);
}
echo '</td>';
echo '<td class="topic">';
if (!empty($event->referer)) {
echo '<div class="referer">'.$event->referer.'</div>';
} else {
echo '<div class="name">'.$event->name."</div>";
}
if (!empty($event->courselink)) {
echo '<div class="course">'.$event->courselink.' </div>';
}
if (!empty($event->time)) {
echo '<span class="date">'.$event->time.'</span>';
} else {
echo '<span class="date">'.calendar_time_representation($event->timestart).'</span>';
}
echo '</td></tr>';
echo '<tr><td class="side"> </td>';
echo '<td class="description '.$event->cssclass.'">';
echo format_text($event->description, FORMAT_HTML);
if (calendar_edit_event_allowed($event)) {
echo '<div class="commands">';
if (empty($event->cmid)) {
$editlink = CALENDAR_URL.'event.php?action=edit&id='.$event->id;
$deletelink = CALENDAR_URL.'event.php?action=delete&id='.$event->id;
} else {
$editlink = $CFG->wwwroot.'/course/mod.php?update='.$event->cmid.'&return=true&sesskey='.$USER->sesskey;
$deletelink = $CFG->wwwroot.'/course/mod.php?delete='.$event->cmid.'&sesskey='.$USER->sesskey;;
}
echo ' <a href="'.$editlink.'"><img
src="'.$CFG->pixpath.'/t/edit.gif" alt="'.get_string('tt_editevent', 'calendar').'"
title="'.get_string('tt_editevent', 'calendar').'" /></a>';
echo ' <a href="'.$deletelink.'"><img
src="'.$CFG->pixpath.'/t/delete.gif" alt="'.get_string('tt_deleteevent', 'calendar').'"
title="'.get_string('tt_deleteevent', 'calendar').'" /></a>';
echo '</div>';
}
echo '</td></tr></table>';
}
function calendar_sql_where($tstart, $tend, $users, $groups, $courses, $withduration=true, $ignorehidden=true) {
$whereclause = '';
// Quick test
if(is_bool($users) && is_bool($groups) && is_bool($courses)) {
return false;
}
if(is_array($users) && !empty($users)) {
// Events from a number of users
if(!empty($whereclause)) $whereclause .= ' OR';
$whereclause .= ' (userid IN ('.implode(',', $users).') AND courseid = 0 AND groupid = 0)';
}
else if(is_numeric($users)) {
// Events from one user
if(!empty($whereclause)) $whereclause .= ' OR';
$whereclause .= ' (userid = '.$users.' AND courseid = 0 AND groupid = 0)';
}
else if($users === true) {
// Events from ALL users
if(!empty($whereclause)) $whereclause .= ' OR';
$whereclause .= ' (userid != 0 AND courseid = 0 AND groupid = 0)';
}
else if($users === false) {
// No user at all, do nothing
}
if(is_array($groups) && !empty($groups)) {
// Events from a number of groups
if(!empty($whereclause)) $whereclause .= ' OR';
$whereclause .= ' groupid IN ('.implode(',', $groups).')';
}
else if(is_numeric($groups)) {
// Events from one group
if(!empty($whereclause)) $whereclause .= ' OR ';
$whereclause .= ' groupid = '.$groups;
}
else if($groups === true) {
// Events from ALL groups
if(!empty($whereclause)) $whereclause .= ' OR ';
$whereclause .= ' groupid != 0';
}
// boolean false (no groups at all): we don't need to do anything
if(is_array($courses)) {
// A number of courses (maybe none at all!)
if(!empty($courses)) {
if(!empty($whereclause)) {
$whereclause .= ' OR';
}
$whereclause .= ' (groupid = 0 AND courseid IN ('.implode(',', $courses).'))';
}
else {
// This means NO courses, not that we don't care!
// No need to do anything
}
}
else if(is_numeric($courses)) {
// One course
if(!empty($whereclause)) $whereclause .= ' OR';
$whereclause .= ' (groupid = 0 AND courseid = '.$courses.')';
}
else if($courses === true) {
// Events from ALL courses
if(!empty($whereclause)) $whereclause .= ' OR';
$whereclause .= ' (groupid = 0 AND courseid != 0)';
}
// Security check: if, by now, we have NOTHING in $whereclause, then it means
// that NO event-selecting clauses were defined. Thus, we won't be returning ANY
// events no matter what. Allowing the code to proceed might return a completely
// valid query with only time constraints, thus selecting ALL events in that time frame!
if(empty($whereclause)) {
return false;
}
if($withduration) {
$timeclause = 'timestart + timeduration >= '.$tstart.' AND timestart <= '.$tend;
}
else {
$timeclause = 'timestart >= '.$tstart.' AND timestart <= '.$tend;
}
if(!empty($whereclause)) {
// We have additional constraints
$whereclause = $timeclause.' AND ('.$whereclause.')';
}
else {
// Just basic time filtering
$whereclause = $timeclause;
}
if ($ignorehidden) {
$whereclause .= ' AND visible = 1';
}
return $whereclause;
}
function calendar_top_controls($type, $data) {
global $CFG, $CALENDARDAYS, $THEME;
$content = '';
if(!isset($data['d'])) {
$data['d'] = 1;
}
if(!checkdate($data['m'], $data['d'], $data['y'])) {
$time = time();
}
else {
$time = make_timestamp($data['y'], $data['m'], $data['d']);
}
$date = usergetdate($time);
$data['m'] = $date['mon'];
$data['y'] = $date['year'];
//Accessibility: calendar block controls, replaced <table> with <div>.
check_theme_arrows();
$nexttext = $THEME->rarrow .'<span class="accesshide">'.get_string('monthnext','access').'</span>';
$prevtext = $THEME->larrow .'<span class="accesshide">'.get_string('monthprev','access').'</span>';
switch($type) {
case 'frontpage':
list($prevmonth, $prevyear) = calendar_sub_month($data['m'], $data['y']);
list($nextmonth, $nextyear) = calendar_add_month($data['m'], $data['y']);
$nextlink = calendar_get_link_tag($nexttext, 'index.php?', 0, $nextmonth, $nextyear);
$prevlink = calendar_get_link_tag($prevtext, 'index.php?', 0, $prevmonth, $prevyear);
$content .= '<div class="calendar-controls">';
$content .= '<span class="previous" title="'.get_string('monthprev','access').'">'.$prevlink."</span>\n";
$content .= '<span class="hide"> | </span><span class="current"><a href="'.calendar_get_link_href(CALENDAR_URL.'view.php?view=month&', 1, $data['m'], $data['y']).'">'.userdate($time, get_string('strftimemonthyear')).'</a></span>';
$content .= '<span class="hide"> | </span><span class="next" title="'.get_string('monthnext','access').'">'.$nextlink."</span>\n";
$content .= "<span class=\"clearer\"><!-- --></span></div>\n";
break;
case 'course':
list($prevmonth, $prevyear) = calendar_sub_month($data['m'], $data['y']);
list($nextmonth, $nextyear) = calendar_add_month($data['m'], $data['y']);
$nextlink = calendar_get_link_tag($nexttext, 'view.php?id='.$data['id'].'&', 0, $nextmonth, $nextyear);
$prevlink = calendar_get_link_tag($prevtext, 'view.php?id='.$data['id'].'&', 0, $prevmonth, $prevyear);
$content .= '<div class="calendar-controls">';
$content .= '<span class="previous" title="'.get_string('monthprev','access').'">'.$prevlink."</span>\n";
$content .= '<span class="hide"> | </span><span class="current"><a href="'.calendar_get_link_href(CALENDAR_URL.'view.php?view=month&course='.$data['id'].'&', 1, $data['m'], $data['y']).'">'.userdate($time, get_string('strftimemonthyear')).'</a></span>';
$content .= '<span class="hide"> | </span><span class="next" title="'.get_string('monthnext','access').'">'.$nextlink."</span>\n";
$content .= "<span class=\"clearer\"><!-- --></span></div>\n";
break;
case 'upcoming':
$content .= '<div style="text-align: center;"><a href="'.CALENDAR_URL.'view.php?view=upcoming">'.userdate($time, get_string('strftimemonthyear'))."</a></div>\n";
break;
case 'display':
$content .= '<div style="text-align: center;"><a href="'.calendar_get_link_href(CALENDAR_URL.'view.php?view=month&', 1, $data['m'], $data['y']).'">'.userdate($time, get_string('strftimemonthyear'))."</a></div>\n";
break;
case 'month':
list($prevmonth, $prevyear) = calendar_sub_month($data['m'], $data['y']);
list($nextmonth, $nextyear) = calendar_add_month($data['m'], $data['y']);
$prevdate = make_timestamp($prevyear, $prevmonth, 1);
$nextdate = make_timestamp($nextyear, $nextmonth, 1);
$content .= '<div class="calendar-controls">';
$content .= '<span class="previous"><a href="'.calendar_get_link_href('view.php?view=month&', 1, $prevmonth, $prevyear)."\"> $THEME->larrow ".userdate($prevdate, get_string('strftimemonthyear')).'</a></span>';
$content .= '<span class="hide"> | </span><span class="current">'.userdate($time, get_string('strftimemonthyear'))."</span>\n";
$content .= '<span class="hide"> | </span><span class="next"><a href="'.calendar_get_link_href('view.php?view=month&', 1, $nextmonth, $nextyear).'">'.userdate($nextdate, get_string('strftimemonthyear'))." $THEME->rarrow</a></span>\n";
$content .= "<span class=\"clearer\"><!-- --></span></div>\n";
break;
case 'day':
$data['d'] = $date['mday']; // Just for convenience
$prevdate = usergetdate(make_timestamp($data['y'], $data['m'], $data['d'] - 1));
$nextdate = usergetdate(make_timestamp($data['y'], $data['m'], $data['d'] + 1));
$prevname = calendar_wday_name($CALENDARDAYS[$prevdate['wday']]);
$nextname = calendar_wday_name($CALENDARDAYS[$nextdate['wday']]);
$content .= '<div class="calendar-controls">';
$content .= '<span class="previous"><a href="'.calendar_get_link_href('view.php?view=day&', $prevdate['mday'], $prevdate['mon'], $prevdate['year'])."\">$THEME->larrow ".$prevname."</a></span>\n";
// Get the format string
$text = get_string('strftimedaydate');
/*
// Regexp hackery to make a link out of the month/year part
$text = ereg_replace('(%B.+%Y|%Y.+%B|%Y.+%m[^ ]+)', '<a href="'.calendar_get_link_href('view.php?view=month&', 1, $data['m'], $data['y']).'">\\1</a>', $text);
$text = ereg_replace('(F.+Y|Y.+F|Y.+m[^ ]+)', '<a href="'.calendar_get_link_href('view.php?view=month&', 1, $data['m'], $data['y']).'">\\1</a>', $text);
*/
// Replace with actual values and lose any day leading zero
$text = userdate($time, $text);
// Print the actual thing
$content .= '<span class="hide"> | </span><span class="current">'.$text.'</span>';
$content .= '<span class="hide"> | </span><span class="next"><a href="'.calendar_get_link_href('view.php?view=day&', $nextdate['mday'], $nextdate['mon'], $nextdate['year']).'">'.$nextname." $THEME->rarrow</a></span>\n";
$content .= "<span class=\"clearer\"><!-- --></span></div>\n";
break;
}
return $content;
}
function calendar_filter_controls($type, $vars = NULL, $course = NULL) {
global $CFG, $SESSION, $USER;
$groupevents = true;
$getvars = '';
$id = optional_param( 'id',0,PARAM_INT );
switch($type) {
case 'event':
case 'upcoming':
case 'day':
case 'month':
$getvars = '&from='.$type;
break;
case 'course':
if ($id > 0) {
$getvars = '&from=course&id='.$id;
} else {
$getvars = '&from=course';
}
if (isset($course->groupmode) and $course->groupmode == NOGROUPS and $course->groupmodeforce) {
$groupevents = false;
}
break;
}
if (!empty($vars)) {
$getvars .= '&'.$vars;
}
$content = '<table>';
$content .= '<tr>';
if($SESSION->cal_show_global) {
$content .= '<td class="event_global" style="width: 11px;"><img src="'.$CFG->pixpath.'/t/hide.gif" class="iconsmall" alt="'.get_string('hide').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showglobal'.$getvars.'" title="'.get_string('tt_hideglobal', 'calendar').'">'.get_string('globalevents', 'calendar').'</a></td>'."\n";
}
else {
$content .= '<td style="width: 11px;"><img src="'.$CFG->pixpath.'/t/show.gif" class="iconsmall" alt="'.get_string('show').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showglobal'.$getvars.'" title="'.get_string('tt_showglobal', 'calendar').'">'.get_string('globalevents', 'calendar').'</a></td>'."\n";
}
if($SESSION->cal_show_course) {
$content .= '<td class="event_course" style="width: 11px;"><img src="'.$CFG->pixpath.'/t/hide.gif" class="iconsmall" alt="'.get_string('hide').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showcourses'.$getvars.'" title="'.get_string('tt_hidecourse', 'calendar').'">'.get_string('courseevents', 'calendar').'</a></td>'."\n";
}
else {
$content .= '<td style="width: 11px;"><img src="'.$CFG->pixpath.'/t/show.gif" class="iconsmall" alt="'.get_string('hide').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showcourses'.$getvars.'" title="'.get_string('tt_showcourse', 'calendar').'">'.get_string('courseevents', 'calendar').'</a></td>'."\n";
}
if(!empty($USER->id) && !isguest()) {
$content .= "</tr>\n<tr>";
if($groupevents) {
// This course MIGHT have group events defined, so show the filter
if($SESSION->cal_show_groups) {
$content .= '<td class="event_group" style="width: 11px;"><img src="'.$CFG->pixpath.'/t/hide.gif" class="iconsmall" alt="'.get_string('hide').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showgroups'.$getvars.'" title="'.get_string('tt_hidegroups', 'calendar').'">'.get_string('groupevents', 'calendar').'</a></td>'."\n";
} else {
$content .= '<td style="width: 11px;"><img src="'.$CFG->pixpath.'/t/show.gif" class="iconsmall" alt="'.get_string('show').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showgroups'.$getvars.'" title="'.get_string('tt_showgroups', 'calendar').'">'.get_string('groupevents', 'calendar').'</a></td>'."\n";
}
if ($SESSION->cal_show_user) {
$content .= '<td class="event_user" style="width: 11px;"><img src="'.$CFG->pixpath.'/t/hide.gif" class="iconsmall" alt="'.get_string('hide').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showuser'.$getvars.'" title="'.get_string('tt_hideuser', 'calendar').'">'.get_string('userevents', 'calendar').'</a></td>'."\n";
} else {
$content .= '<td style="width: 11px;"><img src="'.$CFG->pixpath.'/t/show.gif" class="iconsmall" alt="'.get_string('show').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showuser'.$getvars.'" title="'.get_string('tt_showuser', 'calendar').'">'.get_string('userevents', 'calendar').'</a></td>'."\n";
}
} else {
// This course CANNOT have group events, so lose the filter
$content .= '<td style="width: 11px;"></td><td> </td>'."\n";
if($SESSION->cal_show_user) {
$content .= '<td class="event_user" style="width: 11px;"><img src="'.$CFG->pixpath.'/t/hide.gif" class="iconsmall" alt="'.get_string('hide').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showuser'.$getvars.'" title="'.get_string('tt_hideuser', 'calendar').'">'.get_string('userevents', 'calendar').'</a></td>'."\n";
} else {
$content .= '<td style="width: 11px;"><img src="'.$CFG->pixpath.'/t/show.gif" class="iconsmall" alt="'.get_string('show').'" /></td>';
$content .= '<td><a href="'.CALENDAR_URL.'set.php?var=showuser'.$getvars.'" title="'.get_string('tt_showuser', 'calendar').'">'.get_string('userevents', 'calendar').'</a></td>'."\n";
}
}
}
$content .= "</tr>\n</table>\n";
return $content;
}
function calendar_day_representation($tstamp, $now = false, $usecommonwords = true) {
static $shortformat;
if(empty($shortformat)) {
$shortformat = get_string('strftimedayshort');
}
if($now === false) {
$now = time();
}
// To have it in one place, if a change is needed
$formal = userdate($tstamp, $shortformat);
$datestamp = usergetdate($tstamp);
$datenow = usergetdate($now);
if($usecommonwords == false) {
// We don't want words, just a date
return $formal;
}
else if($datestamp['year'] == $datenow['year'] && $datestamp['yday'] == $datenow['yday']) {
// Today
return get_string('today', 'calendar');
}
else if(
($datestamp['year'] == $datenow['year'] && $datestamp['yday'] == $datenow['yday'] - 1 ) ||
($datestamp['year'] == $datenow['year'] - 1 && $datestamp['mday'] == 31 && $datestamp['mon'] == 12 && $datenow['yday'] == 1)
) {
// Yesterday
return get_string('yesterday', 'calendar');
}
else if(
($datestamp['year'] == $datenow['year'] && $datestamp['yday'] == $datenow['yday'] + 1 ) ||
($datestamp['year'] == $datenow['year'] + 1 && $datenow['mday'] == 31 && $datenow['mon'] == 12 && $datestamp['yday'] == 1)
) {
// Tomorrow
return get_string('tomorrow', 'calendar');
}
else {
return $formal;
}
}
function calendar_time_representation($time) {
static $langtimeformat = NULL;
if($langtimeformat === NULL) {
$langtimeformat = get_string('strftimetime');
}
$timeformat = get_user_preferences('calendar_timeformat');
if(empty($timeformat)){
$timeformat = get_config(NULL,'calendar_site_timeformat');
}
// The ? is needed because the preference might be present, but empty
return userdate($time, empty($timeformat) ? $langtimeformat : $timeformat);
}
function calendar_get_link_href($linkbase, $d, $m, $y) {
if(empty($linkbase)) return '';
$paramstr = '';
if(!empty($d)) $paramstr .= '&cal_d='.$d;
if(!empty($m)) $paramstr .= '&cal_m='.$m;
if(!empty($y)) $paramstr .= '&cal_y='.$y;
if(!empty($paramstr)) $paramstr = substr($paramstr, 5);
return $linkbase.$paramstr;
}
function calendar_get_link_tag($text, $linkbase, $d, $m, $y) {
$href = calendar_get_link_href($linkbase, $d, $m, $y);
if(empty($href)) return $text;
return '<a href="'.$href.'">'.$text.'</a>';
}
function calendar_wday_name($englishname) {
return get_string(strtolower($englishname), 'calendar');
}
function calendar_days_in_month($month, $year) {
return intval(date('t', mktime(0, 0, 0, $month, 1, $year)));
}
function calendar_get_sideblock_upcoming($events, $linkhref = NULL) {
$content = '';
$lines = count($events);
if (!$lines) {
return $content;
}
for ($i = 0; $i < $lines; ++$i) {
if (!isset($events[$i]->time)) { // Just for robustness
continue;
}
$events[$i] = calendar_add_event_metadata($events[$i]);
$content .= '<div class="event"><span class="icon c0">'.$events[$i]->icon.'</span> ';
if (!empty($events[$i]->referer)) {
// That's an activity event, so let's provide the hyperlink
$content .= $events[$i]->referer;
} else {
if(!empty($linkhref)) {
$ed = usergetdate($events[$i]->timestart);
$href = calendar_get_link_href(CALENDAR_URL.$linkhref, $ed['mday'], $ed['mon'], $ed['year']);
$content .= '<a href="'.$href.'#event_'.$events[$i]->id.'">'.$events[$i]->name.'</a>';
}
else {
$content .= $events[$i]->name;
}
}
$events[$i]->time = str_replace('»', '<br />»', $events[$i]->time);
$content .= '<div class="date">'.$events[$i]->time.'</div></div>';
if ($i < $lines - 1) $content .= '<hr />';
}
return $content;
}
function calendar_add_month($month, $year) {
if($month == 12) {
return array(1, $year + 1);
}
else {
return array($month + 1, $year);
}
}
function calendar_sub_month($month, $year) {
if($month == 1) {
return array(12, $year - 1);
}
else {
return array($month - 1, $year);
}
}
function calendar_events_by_day($events, $month, $year, &$eventsbyday, &$durationbyday, &$typesbyday) {
$eventsbyday = array();
$typesbyday = array();
$durationbyday = array();
if($events === false) {
return;
}
foreach($events as $event) {
$startdate = usergetdate($event->timestart);
$enddate = usergetdate($event->timestart + $event->timeduration);
// Simple arithmetic: $year * 13 + $month is a distinct integer for each distinct ($year, $month) pair
if(!($startdate['year'] * 13 + $startdate['mon'] <= $year * 13 + $month) && ($enddate['year'] * 13 + $enddate['mon'] >= $year * 13 + $month)) {
// Out of bounds
continue;
}
$eventdaystart = intval($startdate['mday']);
if($startdate['mon'] == $month && $startdate['year'] == $year) {
// Give the event to its day
$eventsbyday[$eventdaystart][] = $event->id;
// Mark the day as having such an event
if($event->courseid == SITEID && $event->groupid == 0) {
$typesbyday[$eventdaystart]['startglobal'] = true;
}
else if($event->courseid != 0 && $event->courseid != SITEID && $event->groupid == 0) {
$typesbyday[$eventdaystart]['startcourse'] = true;
}
else if($event->groupid) {
$typesbyday[$eventdaystart]['startgroup'] = true;
}
else if($event->userid) {
$typesbyday[$eventdaystart]['startuser'] = true;
}
}
if($event->timeduration == 0) {
// Proceed with the next
continue;
}
// The event starts on $month $year or before. So...
$lowerbound = $startdate['mon'] == $month && $startdate['year'] == $year ? intval($startdate['mday']) : 0;
// Also, it ends on $month $year or later...
$upperbound = $enddate['mon'] == $month && $enddate['year'] == $year ? intval($enddate['mday']) : calendar_days_in_month($month, $year);
// Mark all days between $lowerbound and $upperbound (inclusive) as duration
for($i = $lowerbound + 1; $i <= $upperbound; ++$i) {
$durationbyday[$i][] = $event->id;
if($event->courseid == SITEID && $event->groupid == 0) {
$typesbyday[$i]['durationglobal'] = true;
}
else if($event->courseid != 0 && $event->courseid != SITEID && $event->groupid == 0) {
$typesbyday[$i]['durationcourse'] = true;
}
else if($event->groupid) {
$typesbyday[$i]['durationgroup'] = true;
}
else if($event->userid) {
$typesbyday[$i]['durationuser'] = true;
}
}
}
return;
}
function calendar_get_module_cached(&$coursecache, $modulename, $instance) {
$module = get_coursemodule_from_instance($modulename, $instance);
if($module === false) return false;
if(!calendar_get_course_cached($coursecache, $module->course)) {
return false;
}
return $module;
}
function calendar_get_course_cached(&$coursecache, $courseid) {