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<?php
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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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* @package Sabre
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* @subpackage CalDAV
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* @copyright Copyright (C) 2007-2010 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
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/**
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* pdo
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*
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* @var PDO
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*/
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private $pdo;
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/**
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* List of CalDAV properties, and how they map to database fieldnames
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*
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* Add your own properties by simply adding on to this array
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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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* Creates the backend
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*
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* @param PDO $pdo
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*/
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public function __construct(PDO $pdo) {
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$this->pdo = $pdo;
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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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$fields = array_values($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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$fields[] = 'principaluri';
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// Making fields a comma-delimited list
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$fields = implode(', ', $fields);
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$stmt = $this->pdo->prepare("SELECT " . $fields . " FROM calendars WHERE principaluri = ?");
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$stmt->execute(array($principalUri));
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$calendars = array();
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while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
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$components = explode(',',$row['components']);
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$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($components),
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);
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foreach($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 $properties
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* @return mixed
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*/
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public function createCalendar($principalUri,$calendarUri, array $properties) {
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$fieldNames = array(
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'principaluri',
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'uri',
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'ctag',
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);
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$values = array(
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':principaluri' => $principalUri,
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':uri' => $calendarUri,
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':ctag' => 1,
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);
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// Default value
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$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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foreach($this->propertyMap as $xmlName=>$dbName) {
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if (isset($properties[$xmlName])) {
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$myValue = $properties[$xmlName];
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$values[':' . $dbName] = $properties[$xmlName];
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$fieldNames[] = $dbName;
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}
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}
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$stmt = $this->pdo->prepare("INSERT INTO calendars (".implode(', ', $fieldNames).") VALUES (".implode(', ',array_keys($values)).")");
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$stmt->execute($values);
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return $this->pdo->lastInsertId();
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}
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/**
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* Updates a calendars properties
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*
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* The properties 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-existant property is always succesful.
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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 $properties
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* @return bool|array
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*/
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public function updateCalendar($calendarId, array $properties) {
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$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($properties as $propertyName=>$propertyValue) {
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// We don't know about this property.
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if (!isset($this->propertyMap[$propertyName])) {
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$hasError = true;
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$result[403][$propertyName] = null;
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unset($properties[$propertyName]);
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continue;
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}
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$fieldName = $this->propertyMap[$propertyName];
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$newValues[$fieldName] = $propertyValue;
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}
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// If there were any errors we need to fail the request
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if ($hasError) {
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// Properties has the remaining properties
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foreach($properties 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) unset($result[$status]);
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}
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return $result;
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}
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// Success
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// Now we're generating the sql query.
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$valuesSql = array();
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foreach($newValues as $fieldName=>$value) {
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$valuesSql[] = $fieldName . ' = ?';
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}
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$valuesSql[] = 'ctag = ctag + 1';
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$stmt = $this->pdo->prepare("UPDATE calendars SET " . implode(', ',$valuesSql) . " WHERE id = ?");
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$newValues['id'] = $calendarId;
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$stmt->execute(array_values($newValues));
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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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$stmt = $this->pdo->prepare('DELETE FROM calendarobjects WHERE calendarid = ?');
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$stmt->execute(array($calendarId));
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$stmt = $this->pdo->prepare('DELETE FROM calendars WHERE id = ?');
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$stmt->execute(array($calendarId));
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}
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/**
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* Returns all calendar objects within a calendar object.
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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 calnedar 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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*
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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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$stmt = $this->pdo->prepare('SELECT * FROM calendarobjects WHERE calendarid = ?');
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$stmt->execute(array($calendarId));
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return $stmt->fetchAll();
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}
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/**
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* Returns information from a single calendar object, based on it's object uri.
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*
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* @param string $calendarId
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* @param string $objectUri
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* @return array
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*/
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public function getCalendarObject($calendarId,$objectUri) {
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$stmt = $this->pdo->prepare('SELECT * FROM calendarobjects WHERE calendarid = ? AND uri = ?');
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$stmt->execute(array($calendarId, $objectUri));
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return $stmt->fetch();
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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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* @param string $calendarId
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* @param string $objectUri
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* @param string $calendarData
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* @return void
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*/
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public function createCalendarObject($calendarId,$objectUri,$calendarData) {
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$stmt = $this->pdo->prepare('INSERT INTO calendarobjects (calendarid, uri, calendardata, lastmodified) VALUES (?,?,?,?)');
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$stmt->execute(array($calendarId,$objectUri,$calendarData,time()));
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$stmt = $this->pdo->prepare('UPDATE calendars SET ctag = ctag + 1 WHERE id = ?');
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$stmt->execute(array($calendarId));
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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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* @param string $calendarId
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* @param string $objectUri
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* @param string $calendarData
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* @return void
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*/
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public function updateCalendarObject($calendarId,$objectUri,$calendarData) {
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$stmt = $this->pdo->prepare('UPDATE calendarobjects SET calendardata = ?, lastmodified = ? WHERE calendarid = ? AND uri = ?');
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$stmt->execute(array($calendarData,time(),$calendarId,$objectUri));
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$stmt = $this->pdo->prepare('UPDATE calendars SET ctag = ctag + 1 WHERE id = ?');
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$stmt->execute(array($calendarId));
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}
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/**
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* Deletes an existing calendar object.
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*
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* @param string $calendarId
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* @param string $objectUri
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* @return void
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*/
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public function deleteCalendarObject($calendarId,$objectUri) {
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$stmt = $this->pdo->prepare('DELETE FROM calendarobjects WHERE calendarid = ? AND uri = ?');
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$stmt->execute(array($calendarId,$objectUri));
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$stmt = $this->pdo->prepare('UPDATE calendars SET ctag = ctag + 1 WHERE id = ?');
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$stmt->execute(array($calendarId));
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}
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}
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