mirror of
https://git.friendi.ca/friendica/friendica-addons.git
synced 2024-11-08 11:32:54 +00:00
372 lines
12 KiB
PHP
372 lines
12 KiB
PHP
<?php
|
|
|
|
use Sabre\VObject;
|
|
|
|
/**
|
|
* CalendarQuery Validator
|
|
*
|
|
* This class is responsible for checking if an iCalendar object matches a set
|
|
* of filters. The main function to do this is 'validate'.
|
|
*
|
|
* This is used to determine which icalendar objects should be returned for a
|
|
* calendar-query REPORT request.
|
|
*
|
|
* @package Sabre
|
|
* @subpackage CalDAV
|
|
* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
|
|
* @author Evert Pot (http://www.rooftopsolutions.nl/)
|
|
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
|
|
*/
|
|
class Sabre_CalDAV_CalendarQueryValidator {
|
|
|
|
/**
|
|
* Verify if a list of filters applies to the calendar data object
|
|
*
|
|
* The list of filters must be formatted as parsed by Sabre_CalDAV_CalendarQueryParser
|
|
*
|
|
* @param VObject\Component $vObject
|
|
* @param array $filters
|
|
* @return bool
|
|
*/
|
|
public function validate(VObject\Component $vObject,array $filters) {
|
|
|
|
// The top level object is always a component filter.
|
|
// We'll parse it manually, as it's pretty simple.
|
|
if ($vObject->name !== $filters['name']) {
|
|
return false;
|
|
}
|
|
|
|
return
|
|
$this->validateCompFilters($vObject, $filters['comp-filters']) &&
|
|
$this->validatePropFilters($vObject, $filters['prop-filters']);
|
|
|
|
|
|
}
|
|
|
|
/**
|
|
* This method checks the validity of comp-filters.
|
|
*
|
|
* A list of comp-filters needs to be specified. Also the parent of the
|
|
* component we're checking should be specified, not the component to check
|
|
* itself.
|
|
*
|
|
* @param VObject\Component $parent
|
|
* @param array $filters
|
|
* @return bool
|
|
*/
|
|
protected function validateCompFilters(VObject\Component $parent, array $filters) {
|
|
|
|
foreach($filters as $filter) {
|
|
|
|
$isDefined = isset($parent->$filter['name']);
|
|
|
|
if ($filter['is-not-defined']) {
|
|
|
|
if ($isDefined) {
|
|
return false;
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
}
|
|
if (!$isDefined) {
|
|
return false;
|
|
}
|
|
|
|
if ($filter['time-range']) {
|
|
foreach($parent->$filter['name'] as $subComponent) {
|
|
if ($this->validateTimeRange($subComponent, $filter['time-range']['start'], $filter['time-range']['end'])) {
|
|
continue 2;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (!$filter['comp-filters'] && !$filter['prop-filters']) {
|
|
continue;
|
|
}
|
|
|
|
// If there are sub-filters, we need to find at least one component
|
|
// for which the subfilters hold true.
|
|
foreach($parent->$filter['name'] as $subComponent) {
|
|
|
|
if (
|
|
$this->validateCompFilters($subComponent, $filter['comp-filters']) &&
|
|
$this->validatePropFilters($subComponent, $filter['prop-filters'])) {
|
|
// We had a match, so this comp-filter succeeds
|
|
continue 2;
|
|
}
|
|
|
|
}
|
|
|
|
// If we got here it means there were sub-comp-filters or
|
|
// sub-prop-filters and there was no match. This means this filter
|
|
// needs to return false.
|
|
return false;
|
|
|
|
}
|
|
|
|
// If we got here it means we got through all comp-filters alive so the
|
|
// filters were all true.
|
|
return true;
|
|
|
|
}
|
|
|
|
/**
|
|
* This method checks the validity of prop-filters.
|
|
*
|
|
* A list of prop-filters needs to be specified. Also the parent of the
|
|
* property we're checking should be specified, not the property to check
|
|
* itself.
|
|
*
|
|
* @param VObject\Component $parent
|
|
* @param array $filters
|
|
* @return bool
|
|
*/
|
|
protected function validatePropFilters(VObject\Component $parent, array $filters) {
|
|
|
|
foreach($filters as $filter) {
|
|
|
|
$isDefined = isset($parent->$filter['name']);
|
|
|
|
if ($filter['is-not-defined']) {
|
|
|
|
if ($isDefined) {
|
|
return false;
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
}
|
|
if (!$isDefined) {
|
|
return false;
|
|
}
|
|
|
|
if ($filter['time-range']) {
|
|
foreach($parent->$filter['name'] as $subComponent) {
|
|
if ($this->validateTimeRange($subComponent, $filter['time-range']['start'], $filter['time-range']['end'])) {
|
|
continue 2;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (!$filter['param-filters'] && !$filter['text-match']) {
|
|
continue;
|
|
}
|
|
|
|
// If there are sub-filters, we need to find at least one property
|
|
// for which the subfilters hold true.
|
|
foreach($parent->$filter['name'] as $subComponent) {
|
|
|
|
if(
|
|
$this->validateParamFilters($subComponent, $filter['param-filters']) &&
|
|
(!$filter['text-match'] || $this->validateTextMatch($subComponent, $filter['text-match']))
|
|
) {
|
|
// We had a match, so this prop-filter succeeds
|
|
continue 2;
|
|
}
|
|
|
|
}
|
|
|
|
// If we got here it means there were sub-param-filters or
|
|
// text-match filters and there was no match. This means the
|
|
// filter needs to return false.
|
|
return false;
|
|
|
|
}
|
|
|
|
// If we got here it means we got through all prop-filters alive so the
|
|
// filters were all true.
|
|
return true;
|
|
|
|
}
|
|
|
|
/**
|
|
* This method checks the validity of param-filters.
|
|
*
|
|
* A list of param-filters needs to be specified. Also the parent of the
|
|
* parameter we're checking should be specified, not the parameter to check
|
|
* itself.
|
|
*
|
|
* @param VObject\Property $parent
|
|
* @param array $filters
|
|
* @return bool
|
|
*/
|
|
protected function validateParamFilters(VObject\Property $parent, array $filters) {
|
|
|
|
foreach($filters as $filter) {
|
|
|
|
$isDefined = isset($parent[$filter['name']]);
|
|
|
|
if ($filter['is-not-defined']) {
|
|
|
|
if ($isDefined) {
|
|
return false;
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
}
|
|
if (!$isDefined) {
|
|
return false;
|
|
}
|
|
|
|
if (!$filter['text-match']) {
|
|
continue;
|
|
}
|
|
|
|
// If there are sub-filters, we need to find at least one parameter
|
|
// for which the subfilters hold true.
|
|
foreach($parent[$filter['name']] as $subParam) {
|
|
|
|
if($this->validateTextMatch($subParam,$filter['text-match'])) {
|
|
// We had a match, so this param-filter succeeds
|
|
continue 2;
|
|
}
|
|
|
|
}
|
|
|
|
// If we got here it means there was a text-match filter and there
|
|
// were no matches. This means the filter needs to return false.
|
|
return false;
|
|
|
|
}
|
|
|
|
// If we got here it means we got through all param-filters alive so the
|
|
// filters were all true.
|
|
return true;
|
|
|
|
}
|
|
|
|
/**
|
|
* This method checks the validity of a text-match.
|
|
*
|
|
* A single text-match should be specified as well as the specific property
|
|
* or parameter we need to validate.
|
|
*
|
|
* @param VObject\Node $parent
|
|
* @param array $textMatch
|
|
* @return bool
|
|
*/
|
|
protected function validateTextMatch(VObject\Node $parent, array $textMatch) {
|
|
|
|
$value = (string)$parent;
|
|
|
|
$isMatching = Sabre_DAV_StringUtil::textMatch($value, $textMatch['value'], $textMatch['collation']);
|
|
|
|
return ($textMatch['negate-condition'] xor $isMatching);
|
|
|
|
}
|
|
|
|
/**
|
|
* Validates if a component matches the given time range.
|
|
*
|
|
* This is all based on the rules specified in rfc4791, which are quite
|
|
* complex.
|
|
*
|
|
* @param VObject\Node $component
|
|
* @param DateTime $start
|
|
* @param DateTime $end
|
|
* @return bool
|
|
*/
|
|
protected function validateTimeRange(VObject\Node $component, $start, $end) {
|
|
|
|
if (is_null($start)) {
|
|
$start = new DateTime('1900-01-01');
|
|
}
|
|
if (is_null($end)) {
|
|
$end = new DateTime('3000-01-01');
|
|
}
|
|
|
|
switch($component->name) {
|
|
|
|
case 'VEVENT' :
|
|
case 'VTODO' :
|
|
case 'VJOURNAL' :
|
|
|
|
return $component->isInTimeRange($start, $end);
|
|
|
|
case 'VALARM' :
|
|
|
|
// If the valarm is wrapped in a recurring event, we need to
|
|
// expand the recursions, and validate each.
|
|
//
|
|
// Our datamodel doesn't easily allow us to do this straight
|
|
// in the VALARM component code, so this is a hack, and an
|
|
// expensive one too.
|
|
if ($component->parent->name === 'VEVENT' && $component->parent->RRULE) {
|
|
|
|
// Fire up the iterator!
|
|
$it = new VObject\RecurrenceIterator($component->parent->parent, (string)$component->parent->UID);
|
|
while($it->valid()) {
|
|
$expandedEvent = $it->getEventObject();
|
|
|
|
// We need to check from these expanded alarms, which
|
|
// one is the first to trigger. Based on this, we can
|
|
// determine if we can 'give up' expanding events.
|
|
$firstAlarm = null;
|
|
if ($expandedEvent->VALARM !== null) {
|
|
foreach($expandedEvent->VALARM as $expandedAlarm) {
|
|
|
|
$effectiveTrigger = $expandedAlarm->getEffectiveTriggerTime();
|
|
if ($expandedAlarm->isInTimeRange($start, $end)) {
|
|
return true;
|
|
}
|
|
|
|
if ((string)$expandedAlarm->TRIGGER['VALUE'] === 'DATE-TIME') {
|
|
// This is an alarm with a non-relative trigger
|
|
// time, likely created by a buggy client. The
|
|
// implication is that every alarm in this
|
|
// recurring event trigger at the exact same
|
|
// time. It doesn't make sense to traverse
|
|
// further.
|
|
} else {
|
|
// We store the first alarm as a means to
|
|
// figure out when we can stop traversing.
|
|
if (!$firstAlarm || $effectiveTrigger < $firstAlarm) {
|
|
$firstAlarm = $effectiveTrigger;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (is_null($firstAlarm)) {
|
|
// No alarm was found.
|
|
//
|
|
// Or technically: No alarm that will change for
|
|
// every instance of the recurrence was found,
|
|
// which means we can assume there was no match.
|
|
return false;
|
|
}
|
|
if ($firstAlarm > $end) {
|
|
return false;
|
|
}
|
|
$it->next();
|
|
}
|
|
return false;
|
|
} else {
|
|
return $component->isInTimeRange($start, $end);
|
|
}
|
|
|
|
case 'VFREEBUSY' :
|
|
throw new Sabre_DAV_Exception_NotImplemented('time-range filters are currently not supported on ' . $component->name . ' components');
|
|
|
|
case 'COMPLETED' :
|
|
case 'CREATED' :
|
|
case 'DTEND' :
|
|
case 'DTSTAMP' :
|
|
case 'DTSTART' :
|
|
case 'DUE' :
|
|
case 'LAST-MODIFIED' :
|
|
return ($start <= $component->getDateTime() && $end >= $component->getDateTime());
|
|
|
|
|
|
|
|
default :
|
|
throw new Sabre_DAV_Exception_BadRequest('You cannot create a time-range filter on a ' . $component->name . ' component');
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|