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lib.php
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<?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/>.
/**
* Calendar extension
*
* @package core_calendar
* @copyright 2004 Greek School Network (http://www.sch.gr), Jon Papaioannou,
* Avgoustos Tsinakos
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
if (!defined('MOODLE_INTERNAL')) {
die('Direct access to this script is forbidden.'); /// It must be included from a Moodle page
}
/**
* These are read by the administration component to provide default values
*/
/**
* CALENDAR_DEFAULT_UPCOMING_LOOKAHEAD - default value of upcoming event preference
*/
define('CALENDAR_DEFAULT_UPCOMING_LOOKAHEAD', 21);
/**
* CALENDAR_DEFAULT_UPCOMING_MAXEVENTS - default value to display the maximum number of upcoming event
*/
define('CALENDAR_DEFAULT_UPCOMING_MAXEVENTS', 10);
/**
* CALENDAR_DEFAULT_STARTING_WEEKDAY - default value to display the starting weekday
*/
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
/**
* CALENDAR_DEFAULT_WEEKEND - default value for weekend (Saturday & Sunday)
*/
define('CALENDAR_DEFAULT_WEEKEND', 65);
/**
* CALENDAR_URL - path to calendar's folder
*/
define('CALENDAR_URL', $CFG->wwwroot.'/calendar/');
/**
* CALENDAR_TF_24 - Calendar time in 24 hours format
*/
define('CALENDAR_TF_24', '%H:%M');
/**
* CALENDAR_TF_12 - Calendar time in 12 hours format
*/
define('CALENDAR_TF_12', '%I:%M %p');
/**
* CALENDAR_EVENT_GLOBAL - Global calendar event types
*/
define('CALENDAR_EVENT_GLOBAL', 1);
/**
* CALENDAR_EVENT_COURSE - Course calendar event types
*/
define('CALENDAR_EVENT_COURSE', 2);
/**
* CALENDAR_EVENT_GROUP - group calendar event types
*/
define('CALENDAR_EVENT_GROUP', 4);
/**
* CALENDAR_EVENT_USER - user calendar event types
*/
define('CALENDAR_EVENT_USER', 8);
/**
* CALENDAR_IMPORT_FROM_FILE - import the calendar from a file
*/
define('CALENDAR_IMPORT_FROM_FILE', 0);
/**
* CALENDAR_IMPORT_FROM_URL - import the calendar from a URL
*/
define('CALENDAR_IMPORT_FROM_URL', 1);
/**
* CALENDAR_IMPORT_EVENT_UPDATED - imported event was updated
*/
define('CALENDAR_IMPORT_EVENT_UPDATED', 1);
/**
* CALENDAR_IMPORT_EVENT_INSERTED - imported event was added by insert
*/
define('CALENDAR_IMPORT_EVENT_INSERTED', 2);
/**
* Return the days of the week
*
* @return array array of days
*/
function calendar_get_days() {
return array('sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday');
}
/**
* Gets the first day of the week
*
* Used to be define('CALENDAR_STARTING_WEEKDAY', blah);
*
* @return int
*/
function calendar_get_starting_weekday() {
global $CFG;
if (isset($CFG->calendar_startwday)) {
$firstday = $CFG->calendar_startwday;
} else {
$firstday = get_string('firstdayofweek', 'langconfig');
}
if(!is_numeric($firstday)) {
return CALENDAR_DEFAULT_STARTING_WEEKDAY;
} else {
return intval($firstday) % 7;
}
}
/**
* Generates the HTML for a miniature calendar
*
* @param array $courses list of course
* @param array $groups list of group
* @param array $users user's info
* @param int $cal_month calendar month in numeric, default is set to false
* @param int $cal_year calendar month in numeric, default is set to false
* @return string $content return html table for mini calendar
*/
function calendar_get_mini($courses, $groups, $users, $cal_month = false, $cal_year = false) {
global $CFG, $USER, $OUTPUT;
$display = new stdClass;
$display->minwday = get_user_preferences('calendar_startwday', calendar_get_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!
$events = calendar_get_events(
usertime($display->tstart) - dst_offset_on($display->tstart),
usertime($display->tend) - dst_offset_on($display->tend),
$users, $groups, $courses);
// Set event course class for course events
if (!empty($events)) {
foreach ($events as $eventid => $event) {
if (!empty($event->modulename)) {
$cm = get_coursemodule_from_instance($event->modulename, $event->instance);
if (!groups_course_module_visible($cm)) {
unset($events[$eventid]);
}
}
}
}
// 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.
$hrefparams = array();
if(!empty($courses)) {
$courses = array_diff($courses, array(SITEID));
if(count($courses) == 1) {
$hrefparams['course'] = reset($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, $courses);
//Accessibility: added summary and <abbr> elements.
$days_title = calendar_get_days();
$summary = get_string('calendarheading', 'calendar', userdate(make_timestamp($y, $m), get_string('strftimemonthyear')));
$content .= '<table class="minicalendar calendartable" summary="'.$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 class="dayblank"> </td>'."\n";
}
$weekend = CALENDAR_DEFAULT_WEEKEND;
if (isset($CFG->calendar_weekend)) {
$weekend = intval($CFG->calendar_weekend);
}
// 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
$cell = '';
if ($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])) {
$class .= ' hasevent';
$hrefparams['view'] = 'day';
$dayhref = calendar_get_link_href(new moodle_url(CALENDAR_URL.'view.php', $hrefparams), $day, $m, $y);
$popupcontent = '';
foreach($eventsbyday[$day] as $eventid) {
if (!isset($events[$eventid])) {
continue;
}
$event = $events[$eventid];
$popupalt = '';
$component = 'moodle';
if(!empty($event->modulename)) {
$popupicon = 'icon';
$popupalt = $event->modulename;
$component = $event->modulename;
} else if ($event->courseid == SITEID) { // Site event
$popupicon = 'i/siteevent';
} else if ($event->courseid != 0 && $event->courseid != SITEID && $event->groupid == 0) { // Course event
$popupicon = 'i/courseevent';
} else if ($event->groupid) { // Group event
$popupicon = 'i/groupevent';
} else if ($event->userid) { // User event
$popupicon = 'i/userevent';
}
$dayhref->set_anchor('event_'.$event->id);
$popupcontent .= html_writer::start_tag('div');
$popupcontent .= $OUTPUT->pix_icon($popupicon, $popupalt, $component);
$popupcontent .= html_writer::link($dayhref, format_string($event->name, true));
$popupcontent .= html_writer::end_tag('div');
}
//Accessibility: functionality moved to calendar_get_popup.
if($display->thismonth && $day == $d) {
$popupid = calendar_get_popup(true, $events[$eventid]->timestart, $popupcontent);
} else {
$popupid = calendar_get_popup(false, $events[$eventid]->timestart, $popupcontent);
}
// Class and cell content
if(isset($typesbyday[$day]['startglobal'])) {
$class .= ' calendar_event_global';
} else if(isset($typesbyday[$day]['startcourse'])) {
$class .= ' calendar_event_course';
} else if(isset($typesbyday[$day]['startgroup'])) {
$class .= ' calendar_event_group';
} else if(isset($typesbyday[$day]['startuser'])) {
$class .= ' calendar_event_user';
}
$cell = html_writer::link($dayhref, $day, array('aria-controls' => $popupid.'_panel', 'id' => $popupid));
} else {
$cell = $day;
}
$durationclass = false;
if (isset($typesbyday[$day]['durationglobal'])) {
$durationclass = ' duration_global';
} else if(isset($typesbyday[$day]['durationcourse'])) {
$durationclass = ' duration_course';
} else if(isset($typesbyday[$day]['durationgroup'])) {
$durationclass = ' duration_group';
} else if(isset($typesbyday[$day]['durationuser'])) {
$durationclass = ' duration_user';
}
if ($durationclass) {
$class .= ' duration '.$durationclass;
}
// If event has a class set then add it to the table day <td> tag
// Note: only one colour for minicalendar
if(isset($eventsbyday[$day])) {
foreach($eventsbyday[$day] as $eventid) {
if (!isset($events[$eventid])) {
continue;
}
$event = $events[$eventid];
if (!empty($event->class)) {
$class .= ' '.$event->class;
}
break;
}
}
// 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';
$popupid = calendar_get_popup(true, false);
$cell = html_writer::link('#', $day, array('aria-controls' => $popupid.'_panel', 'id' => $popupid));
}
$cell = get_accesshide($today.' ').$cell;
}
// Just display it
if(!empty($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 class="dayblank"> </td>';
}
$content .= '</tr>'; // Last row ends
$content .= '</table>'; // Tabular display of days ends
return $content;
}
/**
* Gets the calendar popup
*
* It called at multiple points in from calendar_get_mini.
* Copied and modified from calendar_get_mini.
*
* @param bool $is_today false except when called on the current day.
* @param mixed $event_timestart $events[$eventid]->timestart, OR false if there are no events.
* @param string $popupcontent content for the popup window/layout.
* @return string eventid for the calendar_tooltip popup window/layout.
*/
function calendar_get_popup($is_today, $event_timestart, $popupcontent='') {
global $PAGE;
static $popupcount;
if ($popupcount === null) {
$popupcount = 1;
}
$popupcaption = '';
if($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')));
}
$id = 'calendar_tooltip_'.$popupcount;
$PAGE->requires->yui_module('moodle-calendar-eventmanager', 'M.core_calendar.add_event', array(array('eventId'=>$id,'title'=>$popupcaption, 'content'=>$popupcontent)));
$popupcount++;
return $id;
}
/**
* Gets the calendar upcoming event
*
* @param array $courses array of courses
* @param array|int|bool $groups array of groups, group id or boolean for all/no group events
* @param array|int|bool $users array of users, user id or boolean for all/no user events
* @param int $daysinfuture number of days in the future we 'll look
* @param int $maxevents maximum number of events
* @param int $fromtime start time
* @return array $output array of upcoming events
*/
function calendar_get_upcoming($courses, $groups, $users, $daysinfuture, $maxevents, $fromtime=0) {
global $CFG, $COURSE, $DB;
$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
$events = calendar_get_events($display->tstart, $display->tend, $users, $groups, $courses);
// 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.
$hrefparams = array();
if(!empty($courses)) {
$courses = array_diff($courses, array(SITEID));
if(count($courses) == 1) {
$hrefparams['course'] = reset($courses);
}
}
if ($events !== false) {
$modinfo = get_fast_modinfo($COURSE);
foreach($events as $event) {
if (!empty($event->modulename)) {
if ($event->courseid == $COURSE->id) {
if (isset($modinfo->instances[$event->modulename][$event->instance])) {
$cm = $modinfo->instances[$event->modulename][$event->instance];
if (!$cm->uservisible) {
continue;
}
}
} else {
if (!$cm = get_coursemodule_from_instance($event->modulename, $event->instance)) {
continue;
}
if (!coursemodule_visible_for_user($cm)) {
continue;
}
}
if ($event->modulename == 'assignment'){
// create calendar_event to test edit_event capability
// this new event will also prevent double creation of calendar_event object
$checkevent = new calendar_event($event);
// TODO: rewrite this hack somehow
if (!calendar_edit_event_allowed($checkevent)){ // cannot manage entries, eg. student
if (!$assignment = $DB->get_record('assignment', array('id'=>$event->instance))) {
// print_error("invalidid", 'assignment');
continue;
}
// assign assignment to assignment object to use hidden_is_hidden method
require_once($CFG->dirroot.'/mod/assignment/lib.php');
if (!file_exists($CFG->dirroot.'/mod/assignment/type/'.$assignment->assignmenttype.'/assignment.class.php')) {
continue;
}
require_once ($CFG->dirroot.'/mod/assignment/type/'.$assignment->assignmenttype.'/assignment.class.php');
$assignmentclass = 'assignment_'.$assignment->assignmenttype;
$assignmentinstance = new $assignmentclass($cm->id, $assignment, $cm);
if ($assignmentinstance->description_is_hidden()){//force not to show description before availability
$event->description = get_string('notavailableyet', 'assignment');
}
}
}
}
if ($processed >= $display->maxevents) {
break;
}
$event->time = calendar_format_event_time($event, $now, $hrefparams);
$output[] = $event;
++$processed;
}
}
return $output;
}
/**
* Add calendar event metadata
*
* @param stdClass $event event info
* @return stdClass $event metadata
*/
function calendar_add_event_metadata($event) {
global $CFG, $OUTPUT;
//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', $event->modulename);
if (get_string_manager()->string_exists($event->eventtype, $event->modulename)) {
// will be used as alt text if the event icon
$eventtype = get_string($event->eventtype, $event->modulename);
} else {
$eventtype = '';
}
$icon = $OUTPUT->pix_url('icon', $event->modulename) . '';
$context = context_course::instance($module->course);
$fullname = format_string($coursecache[$module->course]->fullname, true, array('context' => $context));
$event->icon = '<img src="'.$icon.'" alt="'.$eventtype.'" title="'.$modulename.'" class="icon" />';
$event->referer = '<a href="'.$CFG->wwwroot.'/mod/'.$event->modulename.'/view.php?id='.$module->id.'">'.$event->name.'</a>';
$event->courselink = '<a href="'.$CFG->wwwroot.'/course/view.php?id='.$module->course.'">'.$fullname.'</a>';
$event->cmid = $module->id;
} else if($event->courseid == SITEID) { // Site event
$event->icon = '<img src="'.$OUTPUT->pix_url('i/siteevent') . '" alt="'.get_string('globalevent', 'calendar').'" class="icon" />';
$event->cssclass = 'calendar_event_global';
} else if($event->courseid != 0 && $event->courseid != SITEID && $event->groupid == 0) { // Course event
calendar_get_course_cached($coursecache, $event->courseid);
$context = context_course::instance($event->courseid);
$fullname = format_string($coursecache[$event->courseid]->fullname, true, array('context' => $context));
$event->icon = '<img src="'.$OUTPUT->pix_url('i/courseevent') . '" alt="'.get_string('courseevent', 'calendar').'" class="icon" />';
$event->courselink = '<a href="'.$CFG->wwwroot.'/course/view.php?id='.$event->courseid.'">'.$fullname.'</a>';
$event->cssclass = 'calendar_event_course';
} else if ($event->groupid) { // Group event
$event->icon = '<img src="'.$OUTPUT->pix_url('i/groupevent') . '" alt="'.get_string('groupevent', 'calendar').'" class="icon" />';
$event->cssclass = 'calendar_event_group';
} else if($event->userid) { // User event
$event->icon = '<img src="'.$OUTPUT->pix_url('i/userevent') . '" alt="'.get_string('userevent', 'calendar').'" class="icon" />';
$event->cssclass = 'calendar_event_user';
}
return $event;
}
/**
* Get calendar events
*
* @param int $tstart Start time of time range for events
* @param int $tend End time of time range for events
* @param array|int|boolean $users array of users, user id or boolean for all/no user events
* @param array|int|boolean $groups array of groups, group id or boolean for all/no group events
* @param array|int|boolean $courses array of courses, course id or boolean for all/no course events
* @param boolean $withduration whether only events starting within time range selected
* or events in progress/already started selected as well
* @param boolean $ignorehidden whether to select only visible events or all events
* @return array $events of selected events or an empty array if there aren't any (or there was an error)
*/
function calendar_get_events($tstart, $tend, $users, $groups, $courses, $withduration=true, $ignorehidden=true) {
global $DB;
$whereclause = '';
// Quick test
if(is_bool($users) && is_bool($groups) && is_bool($courses)) {
return array();
}
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) && !empty($courses)) {
if(!empty($whereclause)) {
$whereclause .= ' OR';
}
$whereclause .= ' (groupid = 0 AND courseid IN ('.implode(',', $courses).'))';
} else if(is_numeric($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 array();
}
if($withduration) {
$timeclause = '(timestart >= '.$tstart.' OR 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';
}
$events = $DB->get_records_select('event', $whereclause, null, 'timestart');
if ($events === false) {
$events = array();
}
return $events;
}
/**
* Get control options for Calendar
*
* @param string $type of calendar
* @param array $data calendar information
* @return string $content return available control for the calender in html
*/
function calendar_top_controls($type, $data) {
global $CFG;
$content = '';
if(!isset($data['d'])) {
$data['d'] = 1;
}
// Ensure course id passed if relevant
// Required due to changes in view/lib.php mainly (calendar_session_vars())
$courseid = '';
if (!empty($data['id'])) {
$courseid = '&course='.$data['id'];
}
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'] = $date['year'];
//Accessibility: calendar block controls, replaced <table> with <div>.
//$nexttext = link_arrow_right(get_string('monthnext', 'access'), $url='', $accesshide=true);
//$prevtext = link_arrow_left(get_string('monthprev', 'access'), $url='', $accesshide=true);
switch($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_next(get_string('monthnext', 'access'), 'index.php?', 0, $nextmonth, $nextyear, $accesshide=true);
$prevlink = calendar_get_link_previous(get_string('monthprev', 'access'), 'index.php?', 0, $prevmonth, $prevyear, true);
$calendarlink = calendar_get_link_href(new moodle_url(CALENDAR_URL.'view.php', array('view'=>'month')), 1, $data['m'], $data['y']);
if (!empty($data['id'])) {
$calendarlink->param('course', $data['id']);
}
if (right_to_left()) {
$left = $nextlink;
$right = $prevlink;
} else {
$left = $prevlink;
$right = $nextlink;
}
$content .= html_writer::start_tag('div', array('class'=>'calendar-controls'));
$content .= $left.'<span class="hide"> | </span>';
$content .= html_writer::tag('span', html_writer::link($calendarlink, userdate($time, get_string('strftimemonthyear')), array('title'=>get_string('monththis','calendar'))), array('class'=>'current'));
$content .= '<span class="hide"> | </span>'. $right;
$content .= "<span class=\"clearer\"><!-- --></span>\n";
$content .= html_writer::end_tag('div');
break;
case 'course':
list($prevmonth, $prevyear) = calendar_sub_month($data['m'], $data['y']);
list($nextmonth, $nextyear) = calendar_add_month($data['m'], $data['y']);
$nextlink = calendar_get_link_next(get_string('monthnext', 'access'), 'view.php?id='.$data['id'].'&', 0, $nextmonth, $nextyear, $accesshide=true);
$prevlink = calendar_get_link_previous(get_string('monthprev', 'access'), 'view.php?id='.$data['id'].'&', 0, $prevmonth, $prevyear, true);
$calendarlink = calendar_get_link_href(new moodle_url(CALENDAR_URL.'view.php', array('view'=>'month')), 1, $data['m'], $data['y']);
if (!empty($data['id'])) {
$calendarlink->param('course', $data['id']);
}
if (right_to_left()) {
$left = $nextlink;
$right = $prevlink;
} else {
$left = $prevlink;
$right = $nextlink;
}
$content .= html_writer::start_tag('div', array('class'=>'calendar-controls'));
$content .= $left.'<span class="hide"> | </span>';
$content .= html_writer::tag('span', html_writer::link($calendarlink, userdate($time, get_string('strftimemonthyear')), array('title'=>get_string('monththis','calendar'))), array('class'=>'current'));
$content .= '<span class="hide"> | </span>'. $right;
$content .= "<span class=\"clearer\"><!-- --></span>";
$content .= html_writer::end_tag('div');
break;
case 'upcoming':
$calendarlink = calendar_get_link_href(new moodle_url(CALENDAR_URL.'view.php', array('view'=>'upcoming')), 1, $data['m'], $data['y']);
if (!empty($data['id'])) {
$calendarlink->param('course', $data['id']);
}
$calendarlink = html_writer::link($calendarlink, userdate($time, get_string('strftimemonthyear')));
$content .= html_writer::tag('div', $calendarlink, array('class'=>'centered'));
break;
case 'display':
$calendarlink = calendar_get_link_href(new moodle_url(CALENDAR_URL.'view.php', array('view'=>'month')), 1, $data['m'], $data['y']);
if (!empty($data['id'])) {
$calendarlink->param('course', $data['id']);
}
$calendarlink = html_writer::link($calendarlink, userdate($time, get_string('strftimemonthyear')));
$content .= html_writer::tag('h3', $calendarlink);
break;
case 'month':
list($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);
$prevlink = calendar_get_link_previous(userdate($prevdate, get_string('strftimemonthyear')), 'view.php?view=month'.$courseid.'&', 1, $prevmonth, $prevyear);
$nextlink = calendar_get_link_next(userdate($nextdate, get_string('strftimemonthyear')), 'view.php?view=month'.$courseid.'&', 1, $nextmonth, $nextyear);
if (right_to_left()) {
$left = $nextlink;
$right = $prevlink;
} else {
$left = $prevlink;
$right = $nextlink;
}
$content .= html_writer::start_tag('div', array('class'=>'calendar-controls'));
$content .= $left . '<span class="hide"> | </span><h1 class="current">'.userdate($time, get_string('strftimemonthyear'))."</h1>";
$content .= '<span class="hide"> | </span>' . $right;
$content .= '<span class="clearer"><!-- --></span>';
$content .= html_writer::end_tag('div')."\n";
break;
case 'day':
$days = calendar_get_days();
$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));
$prevname = calendar_wday_name($days[$prevdate['wday']]);
$nextname = calendar_wday_name($days[$nextdate['wday']]);
$prevlink = calendar_get_link_previous($prevname, 'view.php?view=day'.$courseid.'&', $prevdate['mday'], $prevdate['mon'], $prevdate['year']);
$nextlink = calendar_get_link_next($nextname, 'view.php?view=day'.$courseid.'&', $nextdate['mday'], $nextdate['mon'], $nextdate['year']);
if (right_to_left()) {
$left = $nextlink;
$right = $prevlink;
} else {
$left = $prevlink;
$right = $nextlink;
}
$content .= html_writer::start_tag('div', array('class'=>'calendar-controls'));
$content .= $left;
$content .= '<span class="hide"> | </span><span class="current">'.userdate($time, get_string('strftimedaydate')).'</span>';
$content .= '<span class="hide"> | </span>'. $right;
$content .= "<span class=\"clearer\"><!-- --></span>";
$content .= html_writer::end_tag('div')."\n";
break;
}
return $content;
}
/**
* Formats a filter control element.
*
* @param moodle_url $url of the filter
* @param int $type constant defining the type filter
* @return string html content of the element
*/
function calendar_filter_controls_element(moodle_url $url, $type) {
global $OUTPUT;
switch ($type) {
case CALENDAR_EVENT_GLOBAL:
$typeforhumans = 'global';
$class = 'calendar_event_global';
break;
case CALENDAR_EVENT_COURSE:
$typeforhumans = 'course';
$class = 'calendar_event_course';
break;
case CALENDAR_EVENT_GROUP:
$typeforhumans = 'groups';
$class = 'calendar_event_group';
break;
case CALENDAR_EVENT_USER:
$typeforhumans = 'user';
$class = 'calendar_event_user';
break;
}
if (calendar_show_event_type($type)) {
$icon = $OUTPUT->pix_icon('t/hide', get_string('hide'));
$str = get_string('hide'.$typeforhumans.'events', 'calendar');
} else {
$icon = $OUTPUT->pix_icon('t/show', get_string('show'));
$str = get_string('show'.$typeforhumans.'events', 'calendar');
}
$content = html_writer::start_tag('li', array('class' => 'calendar_event'));
$content .= html_writer::start_tag('a', array('href' => $url));
$content .= html_writer::tag('span', $icon, array('class' => $class));
$content .= html_writer::tag('span', $str, array('class' => 'eventname'));
$content .= html_writer::end_tag('a');
$content .= html_writer::end_tag('li');
return $content;
}
/**
* Get the controls filter for calendar.
*
* Filter is used to hide calendar info from the display page
*
* @param moodle_url $returnurl return-url for filter controls
* @return string $content return filter controls in html
*/
function calendar_filter_controls(moodle_url $returnurl) {
global $CFG, $USER, $OUTPUT;
$groupevents = true;
$id = optional_param( 'id',0,PARAM_INT );
$seturl = new moodle_url('/calendar/set.php', array('return' => base64_encode($returnurl->out(false)), 'sesskey'=>sesskey()));
$content = html_writer::start_tag('ul');
$seturl->param('var', 'showglobal');
$content .= calendar_filter_controls_element($seturl, CALENDAR_EVENT_GLOBAL);
$seturl->param('var', 'showcourses');
$content .= calendar_filter_controls_element($seturl, CALENDAR_EVENT_COURSE);
if (isloggedin() && !isguestuser()) {
if ($groupevents) {
// This course MIGHT have group events defined, so show the filter
$seturl->param('var', 'showgroups');
$content .= calendar_filter_controls_element($seturl, CALENDAR_EVENT_GROUP);
} else {
// This course CANNOT have group events, so lose the filter
}
$seturl->param('var', 'showuser');
$content .= calendar_filter_controls_element($seturl, CALENDAR_EVENT_USER);
}
$content .= html_writer::end_tag('ul');
return $content;
}
/**
* Return the representation day
*
* @param int $tstamp Timestamp in GMT
* @param int $now current Unix timestamp
* @param bool $usecommonwords
* @return string the formatted date/time
*/
function calendar_day_representation($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);