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@@ -0,0 +1,691 @@
+<?php
+
+namespace Sabre\CalDAV\Backend;
+
+use Sabre\VObject;
+use Sabre\CalDAV;
+use Sabre\DAV;
+
+/**
+ * PDO CalDAV backend
+ *
+ * This backend is used to store calendar-data in a PDO database, such as
+ * sqlite or MySQL
+ *
+ * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+class PDO extends AbstractBackend {
+
+ /**
+ * 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
+ */
+ protected $calendarTableName;
+
+ /**
+ * The table name that will be used for calendar objects
+ *
+ * @var string
+ */
+ protected $calendarObjectTableName;
+
+ /**
+ * 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 = array(
+ '{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',
+ );
+
+ /**
+ * Creates the backend
+ *
+ * @param \PDO $pdo
+ * @param string $calendarTableName
+ * @param string $calendarObjectTableName
+ */
+ public function __construct(\PDO $pdo, $calendarTableName = 'calendars', $calendarObjectTableName = 'calendarobjects') {
+
+ $this->pdo = $pdo;
+ $this->calendarTableName = $calendarTableName;
+ $this->calendarObjectTableName = $calendarObjectTableName;
+
+ }
+
+ /**
+ * 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, which the basename of the uri with which the calendar is
+ * accessed.
+ * * 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'.
+ *
+ * @param string $principalUri
+ * @return array
+ */
+ public function getCalendarsForUser($principalUri) {
+
+ $fields = array_values($this->propertyMap);
+ $fields[] = 'id';
+ $fields[] = 'uri';
+ $fields[] = 'ctag';
+ $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");
+ $stmt->execute(array($principalUri));
+
+ $calendars = array();
+ while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+
+ $components = array();
+ if ($row['components']) {
+ $components = explode(',',$row['components']);
+ }
+
+ $calendar = array(
+ 'id' => $row['id'],
+ 'uri' => $row['uri'],
+ 'principaluri' => $row['principaluri'],
+ '{' . CalDAV\Plugin::NS_CALENDARSERVER . '}getctag' => $row['ctag']?$row['ctag']:'0',
+ '{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Property\SupportedCalendarComponentSet($components),
+ '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp' => new CalDAV\Property\ScheduleCalendarTransp($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 $properties
+ * @return string
+ */
+ public function createCalendar($principalUri, $calendarUri, array $properties) {
+
+ $fieldNames = array(
+ 'principaluri',
+ 'uri',
+ 'ctag',
+ 'transparent',
+ );
+ $values = array(
+ ':principaluri' => $principalUri,
+ ':uri' => $calendarUri,
+ ':ctag' => 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\Property\SupportedCalendarComponentSet)) {
+ throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\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 mutations array uses the propertyName in clark-notation as key,
+ * and the array value for the property value. In the case a property
+ * should be deleted, the property value will be null.
+ *
+ * This method must be atomic. If one property cannot be changed, the
+ * entire operation must fail.
+ *
+ * If the operation was successful, true can be returned.
+ * If the operation failed, false can be returned.
+ *
+ * Deletion of a non-existent property is always successful.
+ *
+ * Lastly, it is optional to return detailed information about any
+ * failures. In this case an array should be returned with the following
+ * structure:
+ *
+ * array(
+ * 403 => array(
+ * '{DAV:}displayname' => null,
+ * ),
+ * 424 => array(
+ * '{DAV:}owner' => null,
+ * )
+ * )
+ *
+ * In this example it was forbidden to update {DAV:}displayname.
+ * (403 Forbidden), which in turn also caused {DAV:}owner to fail
+ * (424 Failed Dependency) because the request needs to be atomic.
+ *
+ * @param string $calendarId
+ * @param array $mutations
+ * @return bool|array
+ */
+ public function updateCalendar($calendarId, array $mutations) {
+
+ $newValues = array();
+ $result = array(
+ 200 => array(), // Ok
+ 403 => array(), // Forbidden
+ 424 => array(), // Failed Dependency
+ );
+
+ $hasError = false;
+
+ foreach($mutations as $propertyName=>$propertyValue) {
+
+ switch($propertyName) {
+ case '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp' :
+ $fieldName = 'transparent';
+ $newValues[$fieldName] = $propertyValue->getValue()==='transparent';
+ break;
+ default :
+ // Checking the property map
+ if (!isset($this->propertyMap[$propertyName])) {
+ // We don't know about this property.
+ $hasError = true;
+ $result[403][$propertyName] = null;
+ unset($mutations[$propertyName]);
+ continue;
+ }
+
+ $fieldName = $this->propertyMap[$propertyName];
+ $newValues[$fieldName] = $propertyValue;
+ }
+
+ }
+
+ // If there were any errors we need to fail the request
+ if ($hasError) {
+ // Properties has the remaining properties
+ foreach($mutations as $propertyName=>$propertyValue) {
+ $result[424][$propertyName] = null;
+ }
+
+ // Removing unused statuscodes for cleanliness
+ foreach($result as $status=>$properties) {
+ if (is_array($properties) && count($properties)===0) unset($result[$status]);
+ }
+
+ return $result;
+
+ }
+
+ // Success
+
+ // Now we're generating the sql query.
+ $valuesSql = array();
+ foreach($newValues as $fieldName=>$value) {
+ $valuesSql[] = $fieldName . ' = ?';
+ }
+ $valuesSql[] = 'ctag = ctag + 1';
+
+ $stmt = $this->pdo->prepare("UPDATE " . $this->calendarTableName . " SET " . implode(', ',$valuesSql) . " WHERE id = ?");
+ $newValues['id'] = $calendarId;
+ $stmt->execute(array_values($newValues));
+
+ return true;
+
+ }
+
+ /**
+ * Delete a calendar and all it's objects
+ *
+ * @param string $calendarId
+ * @return void
+ */
+ public function deleteCalendar($calendarId) {
+
+ $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
+ $stmt->execute(array($calendarId));
+
+ $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarTableName.' WHERE id = ?');
+ $stmt->execute(array($calendarId));
+
+ }
+
+ /**
+ * Returns all calendar objects within a calendar.
+ *
+ * Every item contains an array with the following keys:
+ * * id - unique identifier which will be used for subsequent updates
+ * * calendardata - The iCalendar-compatible calendar data
+ * * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
+ * * lastmodified - a timestamp of the last modification time
+ * * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
+ * ' "abcdef"')
+ * * calendarid - The calendarid as it was passed to this function.
+ * * size - The size of the calendar objects, in bytes.
+ *
+ * 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 $calendarId
+ * @return array
+ */
+ public function getCalendarObjects($calendarId) {
+
+ $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
+ $stmt->execute(array($calendarId));
+
+ $result = array();
+ foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+ $result[] = array(
+ 'id' => $row['id'],
+ 'uri' => $row['uri'],
+ 'lastmodified' => $row['lastmodified'],
+ 'etag' => '"' . $row['etag'] . '"',
+ 'calendarid' => $row['calendarid'],
+ 'size' => (int)$row['size'],
+ );
+ }
+
+ return $result;
+
+ }
+
+ /**
+ * Returns information from a single calendar object, based on it's object
+ * uri.
+ *
+ * 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 $objectUri
+ * @return array|null
+ */
+ public function getCalendarObject($calendarId,$objectUri) {
+
+ $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, calendardata FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
+ $stmt->execute(array($calendarId, $objectUri));
+ $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+ if(!$row) return null;
+
+ return array(
+ 'id' => $row['id'],
+ 'uri' => $row['uri'],
+ 'lastmodified' => $row['lastmodified'],
+ 'etag' => '"' . $row['etag'] . '"',
+ 'calendarid' => $row['calendarid'],
+ 'size' => (int)$row['size'],
+ 'calendardata' => $row['calendardata'],
+ );
+
+ }
+
+
+ /**
+ * Creates a new calendar object.
+ *
+ * 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 $calendarData
+ * @return string|null
+ */
+ public function createCalendarObject($calendarId,$objectUri,$calendarData) {
+
+ $extraData = $this->getDenormalizedData($calendarData);
+
+ $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarObjectTableName.' (calendarid, uri, calendardata, lastmodified, etag, size, componenttype, firstoccurence, lastoccurence) VALUES (?,?,?,?,?,?,?,?,?)');
+ $stmt->execute(array(
+ $calendarId,
+ $objectUri,
+ $calendarData,
+ time(),
+ $extraData['etag'],
+ $extraData['size'],
+ $extraData['componentType'],
+ $extraData['firstOccurence'],
+ $extraData['lastOccurence'],
+ ));
+ $stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET ctag = ctag + 1 WHERE id = ?');
+ $stmt->execute(array($calendarId));
+
+ return '"' . $extraData['etag'] . '"';
+
+ }
+
+ /**
+ * Updates an existing calendarobject, based on it's uri.
+ *
+ * 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 $calendarData
+ * @return string|null
+ */
+ public function updateCalendarObject($calendarId,$objectUri,$calendarData) {
+
+ $extraData = $this->getDenormalizedData($calendarData);
+
+ $stmt = $this->pdo->prepare('UPDATE '.$this->calendarObjectTableName.' SET calendardata = ?, lastmodified = ?, etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ? WHERE calendarid = ? AND uri = ?');
+ $stmt->execute(array($calendarData,time(), $extraData['etag'], $extraData['size'], $extraData['componentType'], $extraData['firstOccurence'], $extraData['lastOccurence'] ,$calendarId,$objectUri));
+ $stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET ctag = ctag + 1 WHERE id = ?');
+ $stmt->execute(array($calendarId));
+
+ return '"' . $extraData['etag'] . '"';
+
+ }
+
+ /**
+ * Parses some information from calendar objects, used for optimized
+ * calendar-queries.
+ *
+ * Returns an array with the following keys:
+ * * etag
+ * * size
+ * * componentType
+ * * firstOccurence
+ * * lastOccurence
+ *
+ * @param string $calendarData
+ * @return array
+ */
+ protected function getDenormalizedData($calendarData) {
+
+ $vObject = VObject\Reader::read($calendarData);
+ $componentType = null;
+ $component = null;
+ $firstOccurence = null;
+ $lastOccurence = null;
+ foreach($vObject->getComponents() as $component) {
+ if ($component->name!=='VTIMEZONE') {
+ $componentType = $component->name;
+ break;
+ }
+ }
+ if (!$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 {
+ $it = new VObject\RecurrenceIterator($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 = $end->getTimeStamp();
+ }
+
+ }
+ }
+
+ return array(
+ 'etag' => md5($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) {
+
+ $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
+ $stmt->execute(array($calendarId,$objectUri));
+ $stmt = $this->pdo->prepare('UPDATE '. $this->calendarTableName .' SET ctag = ctag + 1 WHERE id = ?');
+ $stmt->execute(array($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) {
+ $query = "SELECT uri, calendardata FROM ".$this->calendarObjectTableName." WHERE calendarid = :calendarid";
+ } else {
+ $query = "SELECT uri FROM ".$this->calendarObjectTableName." WHERE calendarid = :calendarid";
+ }
+
+ $values = array(
+ '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);
+
+ $result = array();
+ while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+ if ($requirePostFilter) {
+ if (!$this->validateFilterForObject($row, $filters)) {
+ continue;
+ }
+ }
+ $result[] = $row['uri'];
+
+ }
+
+ return $result;
+
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 05:51:01 +0000