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<?php
namespace Sabre\CalDAV\Backend;
use Sabre\VObject;
use Sabre\CalDAV;
use Sabre\DAV;
use Sabre\DAV\Exception\Forbidden;
/**
* PDO CalDAV backend
*
* This backend is used to store calendar-data in a PDO database, such as
* sqlite or MySQL
*
* @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, SchedulingSupport {
/**
* We need to specify a max date, because we need to stop *somewhere*
*
* On 32 bit system the maximum for a signed integer is 2147483647, so
* MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
* in 2038-01-19 to avoid problems when the date is converted
* to a unix timestamp.
*/
const MAX_DATE = '2038-01-01';
/**
* pdo
*
* @var \PDO
*/
protected $pdo;
/**
* The table name that will be used for calendars
*
* @var string
*/
public $calendarTableName = 'calendars';
/**
* The table name that will be used for calendar objects
*
* @var string
*/
public $calendarObjectTableName = 'calendarobjects';
/**
* The table name that will be used for tracking changes in calendars.
*
* @var string
*/
public $calendarChangesTableName = 'calendarchanges';
/**
* The table name that will be used inbox items.
*
* @var string
*/
public $schedulingObjectTableName = 'schedulingobjects';
/**
* The table name that will be used for calendar subscriptions.
*
* @var string
*/
public $calendarSubscriptionsTableName = 'calendarsubscriptions';
/**
* List of CalDAV properties, and how they map to database fieldnames
* Add your own properties by simply adding on to this array.
*
* Note that only string-based properties are supported here.
*
* @var array
*/
public $propertyMap = [
'{DAV:}displayname' => 'displayname',
'{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
'{urn:ietf:params:xml:ns:caldav}calendar-timezone' => 'timezone',
'{http://apple.com/ns/ical/}calendar-order' => 'calendarorder',
'{http://apple.com/ns/ical/}calendar-color' => 'calendarcolor',
];
/**
* List of subscription properties, and how they map to database fieldnames.
*
* @var array
*/
public $subscriptionPropertyMap = [
'{DAV:}displayname' => 'displayname',
'{http://apple.com/ns/ical/}refreshrate' => 'refreshrate',
'{http://apple.com/ns/ical/}calendar-order' => 'calendarorder',
'{http://apple.com/ns/ical/}calendar-color' => 'calendarcolor',
'{http://calendarserver.org/ns/}subscribed-strip-todos' => 'striptodos',
'{http://calendarserver.org/ns/}subscribed-strip-alarms' => 'stripalarms',
'{http://calendarserver.org/ns/}subscribed-strip-attachments' => 'stripattachments',
];
/**
* Creates the backend
*
* @param \PDO $pdo
*/
function __construct(\PDO $pdo) {
$this->pdo = $pdo;
}
/**
* Returns a list of calendars for a principal.
*
* Every project is an array with the following keys:
* * id, a unique id that will be used by other functions to modify the
* calendar. This can be the same as the uri or a database key.
* * uri. This is just the 'base uri' or 'filename' of the calendar.
* * principaluri. The owner of the calendar. Almost always the same as
* principalUri passed to this method.
*
* Furthermore it can contain webdav properties in clark notation. A very
* common one is '{DAV:}displayname'.
*
* Many clients also require:
* {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
* For this property, you can just return an instance of
* Sabre\CalDAV\Xml\Property\SupportedCalendarComponentSet.
*
* If you return {http://sabredav.org/ns}read-only and set the value to 1,
* ACL will automatically be put in read-only mode.
*
* @param string $principalUri
* @return array
*/
function getCalendarsForUser($principalUri) {
$fields = array_values($this->propertyMap);
$fields[] = 'id';
$fields[] = 'uri';
$fields[] = 'synctoken';
$fields[] = 'components';
$fields[] = 'principaluri';
$fields[] = 'transparent';
// Making fields a comma-delimited list
$fields = implode(', ', $fields);
$stmt = $this->pdo->prepare("SELECT " . $fields . " FROM " . $this->calendarTableName . " WHERE principaluri = ? ORDER BY calendarorder ASC");
$stmt->execute([$principalUri]);
$calendars = [];
while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
$components = [];
if ($row['components']) {
$components = explode(',', $row['components']);
}
$calendar = [
'id' => $row['id'],
'uri' => $row['uri'],
'principaluri' => $row['principaluri'],
'{' . CalDAV\Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken'] ? $row['synctoken'] : '0'),
'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
'{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet($components),
'{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
];
foreach ($this->propertyMap as $xmlName => $dbName) {
$calendar[$xmlName] = $row[$dbName];
}
$calendars[] = $calendar;
}
return $calendars;
}
/**
* Creates a new calendar for a principal.
*
* If the creation was a success, an id must be returned that can be used
* to reference this calendar in other methods, such as updateCalendar.
*
* @param string $principalUri
* @param string $calendarUri
* @param array $properties
* @return string
*/
function createCalendar($principalUri, $calendarUri, array $properties) {
$fieldNames = [
'principaluri',
'uri',
'synctoken',
'transparent',
];
$values = [
':principaluri' => $principalUri,
':uri' => $calendarUri,
':synctoken' => 1,
':transparent' => 0,
];
// Default value
$sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
$fieldNames[] = 'components';
if (!isset($properties[$sccs])) {
$values[':components'] = 'VEVENT,VTODO';
} else {
if (!($properties[$sccs] instanceof CalDAV\Xml\Property\SupportedCalendarComponentSet)) {
throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Xml\Property\SupportedCalendarComponentSet');
}
$values[':components'] = implode(',', $properties[$sccs]->getValue());
}
$transp = '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp';
if (isset($properties[$transp])) {
$values[':transparent'] = $properties[$transp]->getValue() === 'transparent';
}
foreach ($this->propertyMap as $xmlName => $dbName) {
if (isset($properties[$xmlName])) {
$values[':' . $dbName] = $properties[$xmlName];
$fieldNames[] = $dbName;
}
}
$stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarTableName . " (" . implode(', ', $fieldNames) . ") VALUES (" . implode(', ', array_keys($values)) . ")");
$stmt->execute($values);
return $this->pdo->lastInsertId();
}
/**
* Updates properties for a calendar.
*
* The list of mutations is stored in a Sabre\DAV\PropPatch object.
* To do the actual updates, you must tell this object which properties
* you're going to process with the handle() method.
*
* Calling the handle method is like telling the PropPatch object "I
* promise I can handle updating this property".
*
* Read the PropPatch documenation for more info and examples.
*
* @param string $calendarId
* @param \Sabre\DAV\PropPatch $propPatch
* @return void
*/
function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch) {
$supportedProperties = array_keys($this->propertyMap);
$supportedProperties[] = '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp';
$propPatch->handle($supportedProperties, function($mutations) use ($calendarId) {
$newValues = [];
foreach ($mutations as $propertyName => $propertyValue) {
switch ($propertyName) {
case '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp' :
$fieldName = 'transparent';
$newValues[$fieldName] = $propertyValue->getValue() === 'transparent';
break;
default :
$fieldName = $this->propertyMap[$propertyName];
$newValues[$fieldName] = $propertyValue;
break;
}
}
$valuesSql = [];
foreach ($newValues as $fieldName => $value) {
$valuesSql[] = $fieldName . ' = ?';
}
$stmt = $this->pdo->prepare("UPDATE " . $this->calendarTableName . " SET " . implode(', ', $valuesSql) . " WHERE id = ?");
$newValues['id'] = $calendarId;
$stmt->execute(array_values($newValues));
$this->addChange($calendarId, "", 2);
return true;
});
}
/**
* Delete a calendar and all it's objects
*
* @param string $calendarId
* @return void
*/
function deleteCalendar($calendarId) {
$stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ?');
$stmt->execute([$calendarId]);
$stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarTableName . ' WHERE id = ?');
$stmt->execute([$calendarId]);
$stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarChangesTableName . ' WHERE calendarid = ?');
$stmt->execute([$calendarId]);
}
/**
* Returns all calendar objects within a calendar.
*
* Every item contains an array with the following keys:
* * calendardata - The iCalendar-compatible calendar data
* * uri - a unique key which will be used to construct the uri. This can
* be any arbitrary string, but making sure it ends with '.ics' is a
* good idea. This is only the basename, or filename, not the full
* path.
* * lastmodified - a timestamp of the last modification time
* * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
* ' "abcdef"')
* * size - The size of the calendar objects, in bytes.
* * component - optional, a string containing the type of object, such
* as 'vevent' or 'vtodo'. If specified, this will be used to populate
* the Content-Type header.
*
* Note that the etag is optional, but it's highly encouraged to return for
* speed reasons.
*
* The calendardata is also optional. If it's not returned
* 'getCalendarObject' will be called later, which *is* expected to return
* calendardata.
*
* If neither etag or size are specified, the calendardata will be
* used/fetched to determine these numbers. If both are specified the
* amount of times this is needed is reduced by a great degree.
*
* @param string $calendarId
* @return array
*/
function getCalendarObjects($calendarId) {
$stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ?');
$stmt->execute([$calendarId]);
$result = [];
foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
$result[] = [
'id' => $row['id'],
'uri' => $row['uri'],
'lastmodified' => $row['lastmodified'],
'etag' => '"' . $row['etag'] . '"',
'calendarid' => $row['calendarid'],
'size' => (int)$row['size'],
'component' => strtolower($row['componenttype']),
];
}
return $result;
}
/**
* Returns information from a single calendar object, based on it's object
* uri.
*
* The object uri is only the basename, or filename and not a full path.
*
* The returned array must have the same keys as getCalendarObjects. The
* 'calendardata' object is required here though, while it's not required
* for getCalendarObjects.
*
* This method must return null if the object did not exist.
*
* @param string $calendarId
* @param string $objectUri
* @return array|null
*/
function getCalendarObject($calendarId, $objectUri) {
$stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, calendardata, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri = ?');
$stmt->execute([$calendarId, $objectUri]);
$row = $stmt->fetch(\PDO::FETCH_ASSOC);
if (!$row) return null;
return [
'id' => $row['id'],
'uri' => $row['uri'],
'lastmodified' => $row['lastmodified'],
'etag' => '"' . $row['etag'] . '"',
'calendarid' => $row['calendarid'],
'size' => (int)$row['size'],
'calendardata' => $row['calendardata'],
'component' => strtolower($row['componenttype']),
];
}
/**
* Returns a list of calendar objects.
*
* This method should work identical to getCalendarObject, but instead
* return all the calendar objects in the list as an array.
*
* If the backend supports this, it may allow for some speed-ups.
*
* @param mixed $calendarId
* @param array $uris
* @return array
*/
function getMultipleCalendarObjects($calendarId, array $uris) {
$query = 'SELECT id, uri, lastmodified, etag, calendarid, size, calendardata, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri IN (';
// Inserting a whole bunch of question marks
$query .= implode(',', array_fill(0, count($uris), '?'));
$query .= ')';
$stmt = $this->pdo->prepare($query);
$stmt->execute(array_merge([$calendarId], $uris));
$result = [];
while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
$result[] = [
'id' => $row['id'],
'uri' => $row['uri'],
'lastmodified' => $row['lastmodified'],
'etag' => '"' . $row['etag'] . '"',
'calendarid' => $row['calendarid'],
'size' => (int)$row['size'],
'calendardata' => $row['calendardata'],
'component' => strtolower($row['componenttype']),
];
}
return $result;
}
/**
* Creates a new calendar object.
*
* The object uri is only the basename, or filename and not a full path.
*
* It is possible return an etag from this function, which will be used in
* the response to this PUT request. Note that the ETag must be surrounded
* by double-quotes.
*
* However, you should only really return this ETag if you don't mangle the
* calendar-data. If the result of a subsequent GET to this object is not
* the exact same as this request body, you should omit the ETag.
*
* @param mixed $calendarId
* @param string $objectUri
* @param string $calendarData
* @return string|null
*/
function createCalendarObject($calendarId, $objectUri, $calendarData) {
$extraData = $this->getDenormalizedData($calendarData);
$stmt = $this->pdo->prepare('INSERT INTO ' . $this->calendarObjectTableName . ' (calendarid, uri, calendardata, lastmodified, etag, size, componenttype, firstoccurence, lastoccurence, uid) VALUES (?,?,?,?,?,?,?,?,?,?)');
$stmt->execute([
$calendarId,
$objectUri,
$calendarData,
time(),
$extraData['etag'],
$extraData['size'],
$extraData['componentType'],
$extraData['firstOccurence'],
$extraData['lastOccurence'],
$extraData['uid'],
]);
$this->addChange($calendarId, $objectUri, 1);
return '"' . $extraData['etag'] . '"';
}
/**
* Updates an existing calendarobject, based on it's uri.
*
* The object uri is only the basename, or filename and not a full path.
*
* It is possible return an etag from this function, which will be used in
* the response to this PUT request. Note that the ETag must be surrounded
* by double-quotes.
*
* However, you should only really return this ETag if you don't mangle the
* calendar-data. If the result of a subsequent GET to this object is not
* the exact same as this request body, you should omit the ETag.
*
* @param mixed $calendarId
* @param string $objectUri
* @param string $calendarData
* @return string|null
*/
function updateCalendarObject($calendarId, $objectUri, $calendarData) {
$extraData = $this->getDenormalizedData($calendarData);
$stmt = $this->pdo->prepare('UPDATE ' . $this->calendarObjectTableName . ' SET calendardata = ?, lastmodified = ?, etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ?, uid = ? WHERE calendarid = ? AND uri = ?');
$stmt->execute([$calendarData, time(), $extraData['etag'], $extraData['size'], $extraData['componentType'], $extraData['firstOccurence'], $extraData['lastOccurence'], $extraData['uid'], $calendarId, $objectUri]);
$this->addChange($calendarId, $objectUri, 2);
return '"' . $extraData['etag'] . '"';
}
/**
* Parses some information from calendar objects, used for optimized
* calendar-queries.
*
* Returns an array with the following keys:
* * etag - An md5 checksum of the object without the quotes.
* * size - Size of the object in bytes
* * componentType - VEVENT, VTODO or VJOURNAL
* * firstOccurence
* * lastOccurence
* * uid - value of the UID property
*
* @param string $calendarData
* @return array
*/
protected function getDenormalizedData($calendarData) {
$vObject = VObject\Reader::read($calendarData);
$componentType = null;
$component = null;
$firstOccurence = null;
$lastOccurence = null;
$uid = null;
foreach ($vObject->getComponents() as $component) {
if ($component->name !== 'VTIMEZONE') {
$componentType = $component->name;
$uid = (string)$component->UID;
break;
}
}
if (!$componentType) {
throw new \Sabre\DAV\Exception\BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
}
if ($componentType === 'VEVENT') {
$firstOccurence = $component->DTSTART->getDateTime()->getTimeStamp();
// Finding the last occurence is a bit harder
if (!isset($component->RRULE)) {
if (isset($component->DTEND)) {
$lastOccurence = $component->DTEND->getDateTime()->getTimeStamp();
} elseif (isset($component->DURATION)) {
$endDate = clone $component->DTSTART->getDateTime();
$endDate->add(VObject\DateTimeParser::parse($component->DURATION->getValue()));
$lastOccurence = $endDate->getTimeStamp();
} elseif (!$component->DTSTART->hasTime()) {
$endDate = clone $component->DTSTART->getDateTime();
$endDate->modify('+1 day');
$lastOccurence = $endDate->getTimeStamp();
} else {
$lastOccurence = $firstOccurence;
}
} else {
$it = new VObject\Recur\EventIterator($vObject, (string)$component->UID);
$maxDate = new \DateTime(self::MAX_DATE);
if ($it->isInfinite()) {
$lastOccurence = $maxDate->getTimeStamp();
} else {
$end = $it->getDtEnd();
while ($it->valid() && $end < $maxDate) {
$end = $it->getDtEnd();
$it->next();
}
$lastOccurence = $end->getTimeStamp();
}
}
}
return [
'etag' => md5($calendarData),
'size' => strlen($calendarData),
'componentType' => $componentType,
'firstOccurence' => $firstOccurence,
'lastOccurence' => $lastOccurence,
'uid' => $uid,
];
}
/**
* Deletes an existing calendar object.
*
* The object uri is only the basename, or filename and not a full path.
*
* @param string $calendarId
* @param string $objectUri
* @return void
*/
function deleteCalendarObject($calendarId, $objectUri) {
$stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri = ?');
$stmt->execute([$calendarId, $objectUri]);
$this->addChange($calendarId, $objectUri, 3);
}
/**
* 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 $filters
* @return array
*/
function calendarQuery($calendarId, array $filters) {
$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) {
$query = "SELECT uri, calendardata FROM " . $this->calendarObjectTableName . " WHERE calendarid = :calendarid";
} else {
$query = "SELECT uri FROM " . $this->calendarObjectTableName . " WHERE calendarid = :calendarid";
}
$values = [
'calendarid' => $calendarId,
];
if ($componentType) {
$query .= " AND componenttype = :componenttype";
$values['componenttype'] = $componentType;
}
if ($timeRange && $timeRange['start']) {
$query .= " AND lastoccurence > :startdate";
$values['startdate'] = $timeRange['start']->getTimeStamp();
}
if ($timeRange && $timeRange['end']) {
$query .= " AND firstoccurence < :enddate";
$values['enddate'] = $timeRange['end']->getTimeStamp();
}
$stmt = $this->pdo->prepare($query);
$stmt->execute($values);
$result = [];
while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
if ($requirePostFilter) {
if (!$this->validateFilterForObject($row, $filters)) {
continue;
}
}
$result[] = $row['uri'];
}
return $result;
}
/**
* Searches through all of a users calendars and calendar objects to find
* an object with a specific UID.
*
* This method should return the path to this object, relative to the
* calendar home, so this path usually only contains two parts:
*
* calendarpath/objectpath.ics
*
* If the uid is not found, return null.
*
* This method should only consider * objects that the principal owns, so
* any calendars owned by other principals that also appear in this
* collection should be ignored.
*
* @param string $principalUri
* @param string $uid
* @return string|null
*/
function getCalendarObjectByUID($principalUri, $uid) {
$query = <<<SQL
SELECT
calendars.uri AS calendaruri, calendarobjects.uri as objecturi
FROM
$this->calendarObjectTableName AS calendarobjects
LEFT JOIN
$this->calendarTableName AS calendars
ON calendarobjects.calendarid = calendars.id
WHERE
calendars.principaluri = ?
AND
calendarobjects.uid = ?
SQL;
$stmt = $this->pdo->prepare($query);
$stmt->execute([$principalUri, $uid]);
if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
return $row['calendaruri'] . '/' . $row['objecturi'];
}
}
/**
* The getChanges method returns all the changes that have happened, since
* the specified syncToken in the specified calendar.
*
* This function should return an array, such as the following:
*
* [
* 'syncToken' => 'The current synctoken',
* 'added' => [
* 'new.txt',
* ],
* 'modified' => [
* 'modified.txt',
* ],
* 'deleted' => [
* 'foo.php.bak',
* 'old.txt'
* ]
* ];
*
* The returned syncToken property should reflect the *current* syncToken
* of the calendar, as reported in the {http://sabredav.org/ns}sync-token
* property this is needed here too, to ensure the operation is atomic.
*
* If the $syncToken argument is specified as null, this is an initial
* sync, and all members should be reported.
*
* The modified property is an array of nodenames that have changed since
* the last token.
*
* The deleted property is an array with nodenames, that have been deleted
* from collection.
*
* The $syncLevel argument is basically the 'depth' of the report. If it's
* 1, you only have to report changes that happened only directly in
* immediate descendants. If it's 2, it should also include changes from
* the nodes below the child collections. (grandchildren)
*
* The $limit argument allows a client to specify how many results should
* be returned at most. If the limit is not specified, it should be treated
* as infinite.
*
* If the limit (infinite or not) is higher than you're willing to return,
* you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
*
* If the syncToken is expired (due to data cleanup) or unknown, you must
* return null.
*
* The limit is 'suggestive'. You are free to ignore it.
*
* @param string $calendarId
* @param string $syncToken
* @param int $syncLevel
* @param int $limit
* @return array
*/
function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null) {
// Current synctoken
$stmt = $this->pdo->prepare('SELECT synctoken FROM ' . $this->calendarTableName . ' WHERE id = ?');
$stmt->execute([ $calendarId ]);
$currentToken = $stmt->fetchColumn(0);
if (is_null($currentToken)) return null;
$result = [
'syncToken' => $currentToken,
'added' => [],
'modified' => [],
'deleted' => [],
];
if ($syncToken) {
$query = "SELECT uri, operation FROM " . $this->calendarChangesTableName . " WHERE synctoken >= ? AND synctoken < ? AND calendarid = ? ORDER BY synctoken";
if ($limit > 0) $query .= " LIMIT " . (int)$limit;
// Fetching all changes
$stmt = $this->pdo->prepare($query);
$stmt->execute([$syncToken, $currentToken, $calendarId]);
$changes = [];
// This loop ensures that any duplicates are overwritten, only the
// last change on a node is relevant.
while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
$changes[$row['uri']] = $row['operation'];
}
foreach ($changes as $uri => $operation) {
switch ($operation) {
case 1 :
$result['added'][] = $uri;
break;
case 2 :
$result['modified'][] = $uri;
break;
case 3 :
$result['deleted'][] = $uri;
break;
}
}
} else {
// No synctoken supplied, this is the initial sync.
$query = "SELECT uri FROM " . $this->calendarObjectTableName . " WHERE calendarid = ?";
$stmt = $this->pdo->prepare($query);
$stmt->execute([$calendarId]);
$result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
}
return $result;
}
/**
* Adds a change record to the calendarchanges table.
*
* @param mixed $calendarId
* @param string $objectUri
* @param int $operation 1 = add, 2 = modify, 3 = delete.
* @return void
*/
protected function addChange($calendarId, $objectUri, $operation) {
$stmt = $this->pdo->prepare('INSERT INTO ' . $this->calendarChangesTableName . ' (uri, synctoken, calendarid, operation) SELECT ?, synctoken, ?, ? FROM ' . $this->calendarTableName . ' WHERE id = ?');
$stmt->execute([
$objectUri,
$calendarId,
$operation,
$calendarId
]);
$stmt = $this->pdo->prepare('UPDATE ' . $this->calendarTableName . ' SET synctoken = synctoken + 1 WHERE id = ?');
$stmt->execute([
$calendarId
]);
}
/**
* Returns a list of subscriptions for a principal.
*
* Every subscription is an array with the following keys:
* * id, a unique id that will be used by other functions to modify the
* subscription. This can be the same as the uri or a database key.
* * uri. This is just the 'base uri' or 'filename' of the subscription.
* * principaluri. The owner of the subscription. Almost always the same as
* principalUri passed to this method.
* * source. Url to the actual feed
*
* Furthermore, all the subscription info must be returned too:
*
* 1. {DAV:}displayname
* 2. {http://apple.com/ns/ical/}refreshrate
* 3. {http://calendarserver.org/ns/}subscribed-strip-todos (omit if todos
* should not be stripped).
* 4. {http://calendarserver.org/ns/}subscribed-strip-alarms (omit if alarms
* should not be stripped).
* 5. {http://calendarserver.org/ns/}subscribed-strip-attachments (omit if
* attachments should not be stripped).
* 7. {http://apple.com/ns/ical/}calendar-color
* 8. {http://apple.com/ns/ical/}calendar-order
* 9. {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
* (should just be an instance of
* Sabre\CalDAV\Property\SupportedCalendarComponentSet, with a bunch of
* default components).
*
* @param string $principalUri
* @return array
*/
function getSubscriptionsForUser($principalUri) {
$fields = array_values($this->subscriptionPropertyMap);
$fields[] = 'id';
$fields[] = 'uri';
$fields[] = 'source';
$fields[] = 'principaluri';
$fields[] = 'lastmodified';
// Making fields a comma-delimited list
$fields = implode(', ', $fields);
$stmt = $this->pdo->prepare("SELECT " . $fields . " FROM " . $this->calendarSubscriptionsTableName . " WHERE principaluri = ? ORDER BY calendarorder ASC");
$stmt->execute([$principalUri]);
$subscriptions = [];
while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
$subscription = [
'id' => $row['id'],
'uri' => $row['uri'],
'principaluri' => $row['principaluri'],
'source' => $row['source'],
'lastmodified' => $row['lastmodified'],
'{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
];
foreach ($this->subscriptionPropertyMap as $xmlName => $dbName) {
if (!is_null($row[$dbName])) {
$subscription[$xmlName] = $row[$dbName];
}
}
$subscriptions[] = $subscription;
}
return $subscriptions;
}
/**
* Creates a new subscription for a principal.
*
* If the creation was a success, an id must be returned that can be used to reference
* this subscription in other methods, such as updateSubscription.
*
* @param string $principalUri
* @param string $uri
* @param array $properties
* @return mixed
*/
function createSubscription($principalUri, $uri, array $properties) {
$fieldNames = [
'principaluri',
'uri',
'source',
'lastmodified',
];
if (!isset($properties['{http://calendarserver.org/ns/}source'])) {
throw new Forbidden('The {http://calendarserver.org/ns/}source property is required when creating subscriptions');
}
$values = [
':principaluri' => $principalUri,
':uri' => $uri,
':source' => $properties['{http://calendarserver.org/ns/}source']->getHref(),
':lastmodified' => time(),
];
foreach ($this->subscriptionPropertyMap as $xmlName => $dbName) {
if (isset($properties[$xmlName])) {
$values[':' . $dbName] = $properties[$xmlName];
$fieldNames[] = $dbName;
}
}
$stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarSubscriptionsTableName . " (" . implode(', ', $fieldNames) . ") VALUES (" . implode(', ', array_keys($values)) . ")");
$stmt->execute($values);
return $this->pdo->lastInsertId();
}
/**
* Updates a subscription
*
* The list of mutations is stored in a Sabre\DAV\PropPatch object.
* To do the actual updates, you must tell this object which properties
* you're going to process with the handle() method.
*
* Calling the handle method is like telling the PropPatch object "I
* promise I can handle updating this property".
*
* Read the PropPatch documenation for more info and examples.
*
* @param mixed $subscriptionId
* @param \Sabre\DAV\PropPatch $propPatch
* @return void
*/
function updateSubscription($subscriptionId, DAV\PropPatch $propPatch) {
$supportedProperties = array_keys($this->subscriptionPropertyMap);
$supportedProperties[] = '{http://calendarserver.org/ns/}source';
$propPatch->handle($supportedProperties, function($mutations) use ($subscriptionId) {
$newValues = [];
foreach ($mutations as $propertyName => $propertyValue) {
if ($propertyName === '{http://calendarserver.org/ns/}source') {
$newValues['source'] = $propertyValue->getHref();
} else {
$fieldName = $this->subscriptionPropertyMap[$propertyName];
$newValues[$fieldName] = $propertyValue;
}
}
// Now we're generating the sql query.
$valuesSql = [];
foreach ($newValues as $fieldName => $value) {
$valuesSql[] = $fieldName . ' = ?';
}
$stmt = $this->pdo->prepare("UPDATE " . $this->calendarSubscriptionsTableName . " SET " . implode(', ', $valuesSql) . ", lastmodified = ? WHERE id = ?");
$newValues['lastmodified'] = time();
$newValues['id'] = $subscriptionId;
$stmt->execute(array_values($newValues));
return true;
});
}
/**
* Deletes a subscription
*
* @param mixed $subscriptionId
* @return void
*/
function deleteSubscription($subscriptionId) {
$stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarSubscriptionsTableName . ' WHERE id = ?');
$stmt->execute([$subscriptionId]);
}
/**
* Returns a single scheduling object.
*
* The returned array should contain the following elements:
* * uri - A unique basename for the object. This will be used to
* construct a full uri.
* * calendardata - The iCalendar object
* * lastmodified - The last modification date. Can be an int for a unix
* timestamp, or a PHP DateTime object.
* * etag - A unique token that must change if the object changed.
* * size - The size of the object, in bytes.
*
* @param string $principalUri
* @param string $objectUri
* @return array
*/
function getSchedulingObject($principalUri, $objectUri) {
$stmt = $this->pdo->prepare('SELECT uri, calendardata, lastmodified, etag, size FROM ' . $this->schedulingObjectTableName . ' WHERE principaluri = ? AND uri = ?');
$stmt->execute([$principalUri, $objectUri]);
$row = $stmt->fetch(\PDO::FETCH_ASSOC);
if (!$row) return null;
return [
'uri' => $row['uri'],
'calendardata' => $row['calendardata'],
'lastmodified' => $row['lastmodified'],
'etag' => '"' . $row['etag'] . '"',
'size' => (int)$row['size'],
];
}
/**
* Returns all scheduling objects for the inbox collection.
*
* These objects should be returned as an array. Every item in the array
* should follow the same structure as returned from getSchedulingObject.
*
* The main difference is that 'calendardata' is optional.
*
* @param string $principalUri
* @return array
*/
function getSchedulingObjects($principalUri) {
$stmt = $this->pdo->prepare('SELECT id, calendardata, uri, lastmodified, etag, size FROM ' . $this->schedulingObjectTableName . ' WHERE principaluri = ?');
$stmt->execute([$principalUri]);
$result = [];
foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
$result[] = [
'calendardata' => $row['calendardata'],
'uri' => $row['uri'],
'lastmodified' => $row['lastmodified'],
'etag' => '"' . $row['etag'] . '"',
'size' => (int)$row['size'],
];
}
return $result;
}
/**
* Deletes a scheduling object
*
* @param string $principalUri
* @param string $objectUri
* @return void
*/
function deleteSchedulingObject($principalUri, $objectUri) {
$stmt = $this->pdo->prepare('DELETE FROM ' . $this->schedulingObjectTableName . ' WHERE principaluri = ? AND uri = ?');
$stmt->execute([$principalUri, $objectUri]);
}
/**
* Creates a new scheduling object. This should land in a users' inbox.
*
* @param string $principalUri
* @param string $objectUri
* @param string $objectData
* @return void
*/
function createSchedulingObject($principalUri, $objectUri, $objectData) {
$stmt = $this->pdo->prepare('INSERT INTO ' . $this->schedulingObjectTableName . ' (principaluri, calendardata, uri, lastmodified, etag, size) VALUES (?, ?, ?, ?, ?, ?)');
$stmt->execute([$principalUri, $objectData, $objectUri, time(), md5($objectData), strlen($objectData) ]);
}
}

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