650 lines
24 KiB
PHP
650 lines
24 KiB
PHP
<?php namespace Gdoo\Calendar\Sabre\Connector;
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/**
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* PDO CalDAV backend
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*
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* This backend is used to store calendar-data in a PDO database, such as
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* sqlite or MySQL
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*
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* @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
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* @author Evert Pot (http://evertpot.com/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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use Gdoo\Index\Models\Share;
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use Gdoo\Calendar\Models\Calendar;
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use Gdoo\Calendar\Models\CalendarObject;
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use Gdoo\Index\Services\ShareService;
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use Gdoo\Calendar\Services\CalendarService;
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use Gdoo\Calendar\Services\CalendarObjectService;
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use Illuminate\Support\Arr;
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class CalDAV extends \Sabre\CalDAV\Backend\AbstractBackend
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{
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/**
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* We need to specify a max date, because we need to stop *somewhere*
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*
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* On 32 bit system the maximum for a signed integer is 2147483647, so
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* MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
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* in 2038-01-19 to avoid problems when the date is converted
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* to a unix timestamp.
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*/
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const MAX_DATE = '2038-01-01';
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/**
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* List of CalDAV properties, and how they map to database fieldnames
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* Add your own properties by simply adding on to this array.
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*
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* Note that only string-based properties are supported here.
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*
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* @var array
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*/
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public $propertyMap = array(
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'{DAV:}displayname' => 'displayname',
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'{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
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'{urn:ietf:params:xml:ns:caldav}calendar-timezone' => 'timezone',
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'{http://apple.com/ns/ical/}calendar-order' => 'calendarorder',
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'{http://apple.com/ns/ical/}calendar-color' => 'calendarcolor',
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);
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/**
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* Returns a list of calendars for a principal.
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*
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* Every project is an array with the following keys:
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* * id, a unique id that will be used by other functions to modify the
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* calendar. This can be the same as the uri or a database key.
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* * uri, which the basename of the uri with which the calendar is
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* accessed.
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* * principaluri. The owner of the calendar. Almost always the same as
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* principalUri passed to this method.
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*
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* Furthermore it can contain webdav properties in clark notation. A very
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* common one is '{DAV:}displayname'.
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*
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* @param string $principalUri
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* @return array
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*/
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public function getCalendarsForUser($principalUri)
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{
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$fields = array_values($this->propertyMap);
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$fields[] = 'id';
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$fields[] = 'uri';
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$fields[] = 'ctag';
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$fields[] = 'components';
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$fields[] = 'principaluri';
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$fields[] = 'transparent';
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$rows = Calendar::where('principaluri', $principalUri)->get($fields);
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foreach ($rows as $row) {
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$components = array();
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if ($row->components) {
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$components = explode(',', $row->components);
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}
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$calendar = array(
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'id' => $row->id,
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'uri' => $row->uri,
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'principaluri' => $row->principaluri,
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'{' . \Sabre\CalDAV\Plugin::NS_CALENDARSERVER . '}getctag' => $row->ctag?$row->ctag:'0',
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'{' . \Sabre\CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new \Sabre\CalDAV\Property\SupportedCalendarComponentSet($components),
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'{' . \Sabre\CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp' => new \Sabre\CalDAV\Property\ScheduleCalendarTransp($row->transparent?'transparent':'opaque'),
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);
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foreach ($this->propertyMap as $xmlName => $dbName) {
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$calendar[$xmlName] = $row[$dbName];
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}
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$calendars[] = $calendar;
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}
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return $calendars;
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}
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/**
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* Creates a new calendar for a principal.
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*
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* If the creation was a success, an id must be returned that can be used to reference
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* this calendar in other methods, such as updateCalendar
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*
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* @param string $principalUri
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* @param string $calendarUri
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* @param array $properties
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* @return string
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*/
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public function createCalendar($principalUri, $calendarUri, array $properties)
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{
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$fieldNames = array(
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'principaluri',
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'uri',
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'ctag',
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'transparent',
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);
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$values = array(
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':principaluri' => $principalUri,
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':uri' => $calendarUri,
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':ctag' => 1,
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':transparent' => 0,
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);
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$data = array(
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'principaluri' => $principalUri,
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'uri' => $calendarUri,
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'ctag' => 1,
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'transparent' => 0,
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);
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// Default value
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$sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
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$fieldNames[] = 'components';
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if (!isset($properties[$sccs])) {
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$values[':components'] = 'VEVENT,VTODO';
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} else {
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if (!($properties[$sccs] instanceof \Sabre\CalDAV\Property\SupportedCalendarComponentSet)) {
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throw new \Sabre\DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
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}
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$values[':components'] = implode(',', $properties[$sccs]->getValue());
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}
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$transp = '{' . \Sabre\CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp';
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if (isset($properties[$transp])) {
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$values[':transparent'] = $properties[$transp]->getValue()==='transparent';
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}
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foreach ($this->propertyMap as $xmlName => $dbName) {
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if (isset($properties[$xmlName])) {
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$values[':' . $dbName] = $properties[$xmlName];
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$fieldNames[] = $dbName;
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$data[$dbName] = $properties[$xmlName];
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}
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}
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return Calendar::insertGetId($data);
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}
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/**
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* Updates properties for a calendar.
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*
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* The mutations array uses the propertyName in clark-notation as key,
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* and the array value for the property value. In the case a property
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* should be deleted, the property value will be null.
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*
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* This method must be atomic. If one property cannot be changed, the
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* entire operation must fail.
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*
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* If the operation was successful, true can be returned.
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* If the operation failed, false can be returned.
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*
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* Deletion of a non-existent property is always successful.
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*
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* Lastly, it is optional to return detailed information about any
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* failures. In this case an array should be returned with the following
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* structure:
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*
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* array(
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* 403 => array(
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* '{DAV:}displayname' => null,
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* ),
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* 424 => array(
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* '{DAV:}owner' => null,
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* )
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* )
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*
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* In this example it was forbidden to update {DAV:}displayname.
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* (403 Forbidden), which in turn also caused {DAV:}owner to fail
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* (424 Failed Dependency) because the request needs to be atomic.
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*
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* @param string $calendarId
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* @param array $mutations
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* @return bool|array
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*/
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public function updateCalendar($calendarId, array $mutations)
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{
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$newValues = array();
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$result = array(
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200 => array(), // Ok
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403 => array(), // Forbidden
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424 => array(), // Failed Dependency
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);
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$hasError = false;
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foreach ($mutations as $propertyName => $propertyValue) {
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switch ($propertyName) {
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case '{' . \Sabre\CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp':
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$fieldName = 'transparent';
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$newValues[$fieldName] = $propertyValue->getValue()==='transparent';
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break;
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default:
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// Checking the property map
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if (!isset($this->propertyMap[$propertyName])) {
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// We don't know about this property.
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$hasError = true;
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$result[403][$propertyName] = null;
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unset($mutations[$propertyName]);
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continue;
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}
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$fieldName = $this->propertyMap[$propertyName];
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$newValues[$fieldName] = $propertyValue;
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}
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}
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// If there were any errors we need to fail the request
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if ($hasError) {
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// Properties has the remaining properties
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foreach ($mutations as $propertyName => $propertyValue) {
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$result[424][$propertyName] = null;
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}
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// Removing unused statuscodes for cleanliness
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foreach ($result as $status => $properties) {
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if (is_array($properties) && count($properties)===0) {
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unset($result[$status]);
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}
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}
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return $result;
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}
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// Success
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// Now we're generating the sql query.
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Calendar::where('id', $calendarId)->update($newValues);
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CalendarService::touchCalendar($calendarId);
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return true;
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}
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/**
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* Delete a calendar and all it's objects
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*
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* @param string $calendarId
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* @return void
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*/
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public function deleteCalendar($calendarId)
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{
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CalendarService::deleteCalendar($calendarId);
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}
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/**
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* Returns all calendar objects within a calendar.
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*
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* Every item contains an array with the following keys:
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* * id - unique identifier which will be used for subsequent updates
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* * calendardata - The iCalendar-compatible calendar data
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* * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
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* * lastmodified - a timestamp of the last modification time
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* * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
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* ' "abcdef"')
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* * calendarid - The calendarid as it was passed to this function.
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* * size - The size of the calendar objects, in bytes.
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*
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* Note that the etag is optional, but it's highly encouraged to return for
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* speed reasons.
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*
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* The calendardata is also optional. If it's not returned
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* 'getCalendarObject' will be called later, which *is* expected to return
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* calendardata.
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*
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* If neither etag or size are specified, the calendardata will be
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* used/fetched to determine these numbers. If both are specified the
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* amount of times this is needed is reduced by a great degree.
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*
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* @param string $calendarId
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* @return array
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*/
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public function getCalendarObjects($calendarId)
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{
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$model = CalendarObject::select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size']);
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if ($calendarId == 'share-events') {
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$shared = ShareService::getItemsSourceBy(['event'], \Auth::id());
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if ($shared->isEmpty()) {
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return array();
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}
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$share_id = Arr::pluck($shared, 'source_id');
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$rows = $model->whereIn('id', $share_id)->get();
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foreach ($rows as $key => $row) {
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$rows[$key]['calendarid'] = 'share-events';
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}
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} elseif ($calendarId > 0) {
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$rows = $model->where('calendarid', $calendarId)->get();
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}
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$result = array();
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foreach ($rows as $row) {
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$result[] = array(
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'id' => $row->id,
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'uri' => $row->uri,
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'lastmodified' => $row->lastmodified,
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'etag' => '"' . $row->etag . '"',
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'calendarid' => $row->calendarid,
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'size' => (int)$row->size,
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);
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}
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return $result;
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}
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/**
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* Returns information from a single calendar object, based on it's object
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* uri.
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*
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* The returned array must have the same keys as getCalendarObjects. The
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* 'calendardata' object is required here though, while it's not required
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* for getCalendarObjects.
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*
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* This method must return null if the object did not exist.
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*
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* @param string $calendarId
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* @param string $objectUri
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* @return array|null
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*/
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public function getCalendarObject($calendarId, $objectUri)
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{
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$model = CalendarObject::where('uri', $objectUri);
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if ($calendarId == 'share-events') {
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$shared = ShareService::getItemsSourceBy(['event'], \Auth::id());
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if ($shared->isEmpty()) {
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return array();
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}
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$shareId = Arr::pluck($shared, 'source_id');
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$shareUsersList = Arr::pluck($shared, 'name', 'source_id');
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$row = $model->whereIn('id', $shareId)->first();
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$row->calendarid = 'share-events';
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$vcalendar = \Sabre\VObject\Reader::read($row->calendardata);
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$vcalendar->VEvent->SUMMARY->value = '['.$shareUsersList[$row->id].']'.$vcalendar->VEvent->SUMMARY->value;
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$row->calendardata = $vcalendar->serialize();
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} elseif ($calendarId > 0) {
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$row = $model->where('calendarid', $calendarId)->first();
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}
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if (empty($row)) {
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return array();
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}
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return array(
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'id' => $row->id,
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'uri' => $row->uri,
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'lastmodified' => $row->lastmodified,
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'etag' => '"' . $row->etag . '"',
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'calendarid' => $row->calendarid,
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'size' => (int)$row->size,
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'calendardata' => $row->calendardata,
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);
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}
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/**
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* Creates a new calendar object.
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*
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* It is possible return an etag from this function, which will be used in
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* the response to this PUT request. Note that the ETag must be surrounded
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* by double-quotes.
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*
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* However, you should only really return this ETag if you don't mangle the
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* calendar-data. If the result of a subsequent GET to this object is not
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* the exact same as this request body, you should omit the ETag.
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*
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* @param mixed $calendarId
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* @param string $objectUri
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* @param string $calendarData
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* @return string|null
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*/
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public function createCalendarObject($calendarId, $objectUri, $calendarData)
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{
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$extraData = $this->getDenormalizedData($calendarData);
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$data = array(
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'calendarid' => $calendarId,
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'uri' => $objectUri,
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'calendardata' => $calendarData,
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'lastmodified' => time(),
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'etag' => $extraData['etag'],
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'size' => $extraData['size'],
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'componenttype' => $extraData['componentType'],
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'firstoccurence' => $extraData['firstOccurence'],
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'lastoccurence' => $extraData['lastOccurence'],
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);
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CalendarObject::insert($data);
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CalendarService::touchCalendar($calendarId);
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return '"' . $extraData['etag'] . '"';
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}
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/**
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* Updates an existing calendarobject, based on it's uri.
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*
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* It is possible return an etag from this function, which will be used in
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* the response to this PUT request. Note that the ETag must be surrounded
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* by double-quotes.
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*
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* However, you should only really return this ETag if you don't mangle the
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* calendar-data. If the result of a subsequent GET to this object is not
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* the exact same as this request body, you should omit the ETag.
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*
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* @param mixed $calendarId
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* @param string $objectUri
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* @param string $calendarData
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* @return string|null
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*/
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public function updateCalendarObject($calendarId, $objectUri, $calendarData)
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{
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$extraData = $this->getDenormalizedData($calendarData);
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$update = array(
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'calendardata' => $calendarData,
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'lastmodified' => time(),
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'etag' => $extraData['etag'],
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'size' => $extraData['size'],
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'componenttype' => $extraData['componentType'],
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'firstoccurence' => $extraData['firstOccurence'],
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'lastoccurence' => $extraData['lastOccurence'],
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);
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CalendarObject::where('calendarid', $calendarId)->where('uri', $objectUri)->update($update);
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CalendarService::touchCalendar($calendarId);
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return '"' . $extraData['etag'] . '"';
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}
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/**
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* Parses some information from calendar objects, used for optimized
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* calendar-queries.
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*
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* Returns an array with the following keys:
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* * etag
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* * size
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* * componentType
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* * firstOccurence
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* * lastOccurence
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*
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* @param string $calendarData
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* @return array
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*/
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protected function getDenormalizedData($calendarData)
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{
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$vObject = \Sabre\VObject\Reader::read($calendarData);
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$componentType = null;
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$component = null;
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$firstOccurence = null;
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$lastOccurence = null;
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foreach ($vObject->getComponents() as $component) {
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if ($component->name!=='VTIMEZONE') {
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$componentType = $component->name;
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break;
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}
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}
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if (!$componentType) {
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throw new \Sabre\DAV\Exception\BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
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}
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if ($componentType === 'VEVENT') {
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$firstOccurence = $component->DTSTART->getDateTime()->getTimeStamp();
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// Finding the last occurence is a bit harder
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if (!isset($component->RRULE)) {
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if (isset($component->DTEND)) {
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$lastOccurence = $component->DTEND->getDateTime()->getTimeStamp();
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} elseif (isset($component->DURATION)) {
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$endDate = clone $component->DTSTART->getDateTime();
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$endDate->add(\Sabre\VObject\DateTimeParser::parse($component->DURATION->getValue()));
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$lastOccurence = $endDate->getTimeStamp();
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} elseif (!$component->DTSTART->hasTime()) {
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$endDate = clone $component->DTSTART->getDateTime();
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$endDate->modify('+1 day');
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$lastOccurence = $endDate->getTimeStamp();
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} else {
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$lastOccurence = $firstOccurence;
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}
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} else {
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$it = new \Sabre\VObject\RecurrenceIterator($vObject, (string)$component->UID);
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$maxDate = new \DateTime(self::MAX_DATE);
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if ($it->isInfinite()) {
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$lastOccurence = $maxDate->getTimeStamp();
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} else {
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$end = $it->getDtEnd();
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while ($it->valid() && $end < $maxDate) {
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$end = $it->getDtEnd();
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$it->next();
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}
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|
$lastOccurence = $end->getTimeStamp();
|
|
}
|
|
}
|
|
}
|
|
|
|
return array(
|
|
'etag' => md5($calendarData),
|
|
'size' => strlen($calendarData),
|
|
'componentType' => $componentType,
|
|
'firstOccurence' => $firstOccurence,
|
|
'lastOccurence' => $lastOccurence,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Deletes an existing calendar object.
|
|
*
|
|
* @param string $calendarId
|
|
* @param string $objectUri
|
|
* @return void
|
|
*/
|
|
public function deleteCalendarObject($calendarId, $objectUri)
|
|
{
|
|
CalendarObject::where('calendarid', $calendarId)->where('uri', $objectUri)->delete();
|
|
CalendarService::touchCalendar($calendarId);
|
|
}
|
|
|
|
/**
|
|
* Performs a calendar-query on the contents of this calendar.
|
|
*
|
|
* The calendar-query is defined in RFC4791 : CalDAV. Using the
|
|
* calendar-query it is possible for a client to request a specific set of
|
|
* object, based on contents of iCalendar properties, date-ranges and
|
|
* iCalendar component types (VTODO, VEVENT).
|
|
*
|
|
* This method should just return a list of (relative) urls that match this
|
|
* query.
|
|
*
|
|
* The list of filters are specified as an array. The exact array is
|
|
* documented by \Sabre\CalDAV\CalendarQueryParser.
|
|
*
|
|
* Note that it is extremely likely that getCalendarObject for every path
|
|
* returned from this method will be called almost immediately after. You
|
|
* may want to anticipate this to speed up these requests.
|
|
*
|
|
* This method provides a default implementation, which parses *all* the
|
|
* iCalendar objects in the specified calendar.
|
|
*
|
|
* This default may well be good enough for personal use, and calendars
|
|
* that aren't very large. But if you anticipate high usage, big calendars
|
|
* or high loads, you are strongly adviced to optimize certain paths.
|
|
*
|
|
* The best way to do so is override this method and to optimize
|
|
* specifically for 'common filters'.
|
|
*
|
|
* Requests that are extremely common are:
|
|
* * requests for just VEVENTS
|
|
* * requests for just VTODO
|
|
* * requests with a time-range-filter on a VEVENT.
|
|
*
|
|
* ..and combinations of these requests. It may not be worth it to try to
|
|
* handle every possible situation and just rely on the (relatively
|
|
* easy to use) CalendarQueryValidator to handle the rest.
|
|
*
|
|
* Note that especially time-range-filters may be difficult to parse. A
|
|
* time-range filter specified on a VEVENT must for instance also handle
|
|
* recurrence rules correctly.
|
|
* A good example of how to interprete all these filters can also simply
|
|
* be found in \Sabre\CalDAV\CalendarQueryFilter. This class is as correct
|
|
* as possible, so it gives you a good idea on what type of stuff you need
|
|
* to think of.
|
|
*
|
|
* This specific implementation (for the PDO) backend optimizes filters on
|
|
* specific components, and VEVENT time-ranges.
|
|
*
|
|
* @param string $calendarId
|
|
* @param array $filters
|
|
* @return array
|
|
*/
|
|
public function calendarQuery($calendarId, array $filters)
|
|
{
|
|
$result = array();
|
|
$validator = new \Sabre\CalDAV\CalendarQueryValidator();
|
|
|
|
$componentType = null;
|
|
$requirePostFilter = true;
|
|
$timeRange = null;
|
|
|
|
// if no filters were specified, we don't need to filter after a query
|
|
if (!$filters['prop-filters'] && !$filters['comp-filters']) {
|
|
$requirePostFilter = false;
|
|
}
|
|
|
|
// Figuring out if there's a component filter
|
|
if (count($filters['comp-filters']) > 0 && !$filters['comp-filters'][0]['is-not-defined']) {
|
|
$componentType = $filters['comp-filters'][0]['name'];
|
|
|
|
// Checking if we need post-filters
|
|
if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['time-range'] && !$filters['comp-filters'][0]['prop-filters']) {
|
|
$requirePostFilter = false;
|
|
}
|
|
// There was a time-range filter
|
|
if ($componentType == 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
|
|
$timeRange = $filters['comp-filters'][0]['time-range'];
|
|
|
|
// If start time OR the end time is not specified, we can do a
|
|
// 100% accurate mysql query.
|
|
if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['prop-filters'] && (!$timeRange['start'] || !$timeRange['end'])) {
|
|
$requirePostFilter = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($requirePostFilter) {
|
|
$model = CalendarObject::select(array('uri', 'calendardata'));
|
|
} else {
|
|
$model = CalendarObject::select(array('uri'));
|
|
}
|
|
|
|
if ($calendarId == 'share-events') {
|
|
$shared = ShareService::getItemsSourceBy(['event'], \Auth::id());
|
|
$shareId = Arr::pluck($shared, 'source_id');
|
|
$model->whereIn('id', $shareId);
|
|
} else {
|
|
$model->where('calendarid', $calendarId);
|
|
}
|
|
|
|
if ($componentType) {
|
|
$model->where('componenttype', $componentType);
|
|
}
|
|
|
|
if ($timeRange && $timeRange['start']) {
|
|
$model->where('lastoccurence', '>', $timeRange['start']->getTimeStamp());
|
|
}
|
|
if ($timeRange && $timeRange['end']) {
|
|
$model->where('firstoccurence', '<', $timeRange['end']->getTimeStamp());
|
|
}
|
|
$rows = $model->get()->toArray();
|
|
foreach ($rows as $row) {
|
|
if ($requirePostFilter) {
|
|
if (!$this->validateFilterForObject($row, $filters)) {
|
|
continue;
|
|
}
|
|
}
|
|
$result[] = $row['uri'];
|
|
}
|
|
return $result;
|
|
}
|
|
}
|