<?php
  
  namespace Sabre\CalDAV\Backend;
  use Sabre\DAV;
  use Sabre\CalDAV;
  
  class Mock extends AbstractBackend implements NotificationSupport, SharingSupport {
  
      private $calendarData;
      private $calendars;
      private $notifications;
      private $shares = array();
  
      function __construct(array $calendars, array $calendarData, array $notifications = array()) {
  
          $this->calendars = $calendars;
          $this->calendarData = $calendarData;
          $this->notifications = $notifications;
  
      }
  
      /**
       * 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 $principalUri
       * @return array
       */
      function getCalendarsForUser($principalUri) {
  
          $r = array();
          foreach($this->calendars as $row) {
              if ($row['principaluri'] == $principalUri) {
                  $r[] = $row;
              }
          }
  
          return $r;
  
      }
  
      /**
       * 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.
       *
       * This function must return a server-wide unique id that can be used
       * later to reference the calendar.
       *
       * @param string $principalUri
       * @param string $calendarUri
       * @param array $properties
       * @return string|int
       */
      function createCalendar($principalUri,$calendarUri,array $properties) {
  
          $id = DAV\UUIDUtil::getUUID();
          $this->calendars[] = array_merge(array(
              'id' => $id,
              'principaluri' => $principalUri,
              'uri' => $calendarUri,
              '{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Property\SupportedCalendarComponentSet(array('VEVENT','VTODO')),
          ), $properties);
  
          return $id;
  
      }
  
      /**
       * Updates properties on this node,
       *
       * The properties 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 $properties
       * @return bool|array
       */
      public function updateCalendar($calendarId, array $properties) {
  
          return false;
  
      }
  
      /**
       * Delete a calendar and all it's objects
       *
       * @param string $calendarId
       * @return void
       */
      public function deleteCalendar($calendarId) {
  
          foreach($this->calendars as $k=>$calendar) {
              if ($calendar['id'] === $calendarId) {
                  unset($this->calendars[$k]);
              }
          }
  
      }
  
      /**
       * Returns all calendar objects within a calendar object.
       *
       * 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.
       *
       * 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.
       *
       * @param string $calendarId
       * @return array
       */
      public function getCalendarObjects($calendarId) {
  
          if (!isset($this->calendarData[$calendarId]))
              return array();
  
          $objects = $this->calendarData[$calendarId];
  
          foreach($objects as $uri => &$object) {
              $object['calendarid'] = $calendarId;
              $object['uri'] = $uri;
  
          }
          return $objects;
  
      }
  
      /**
       * 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.
       *
       * @param string $calendarId
       * @param string $objectUri
       * @return array
       */
      function getCalendarObject($calendarId,$objectUri) {
  
          if (!isset($this->calendarData[$calendarId][$objectUri])) {
              throw new DAV\Exception\NotFound('Object could not be found');
          }
          $object = $this->calendarData[$calendarId][$objectUri];
          $object['calendarid'] = $calendarId;
          $object['uri'] = $objectUri;
          return $object;
  
      }
  
      /**
       * Creates a new calendar object.
       *
       * @param string $calendarId
       * @param string $objectUri
       * @param string $calendarData
       * @return void
       */
      function createCalendarObject($calendarId,$objectUri,$calendarData) {
  
          $this->calendarData[$calendarId][$objectUri] = array(
              'calendardata' => $calendarData,
              'calendarid' => $calendarId,
              'uri' => $objectUri,
          );
  
      }
  
      /**
       * Updates an existing calendarobject, based on it's uri.
       *
       * @param string $calendarId
       * @param string $objectUri
       * @param string $calendarData
       * @return void
       */
      function updateCalendarObject($calendarId,$objectUri,$calendarData) {
  
          $this->calendarData[$calendarId][$objectUri] = array(
              'calendardata' => $calendarData,
              'calendarid' => $calendarId,
              'uri' => $objectUri,
          );
  
      }
  
      /**
       * Deletes an existing calendar object.
       *
       * @param string $calendarId
       * @param string $objectUri
       * @return void
       */
      function deleteCalendarObject($calendarId,$objectUri) {
  
          throw new Exception('Not implemented');
  
  
      }
  
      /**
       * Returns a list of notifications for a given principal url.
       *
       * The returned array should only consist of implementations of
       * Sabre\CalDAV\Notifications\INotificationType.
       *
       * @param string $principalUri
       * @return array
       */
      public function getNotificationsForPrincipal($principalUri) {
  
          if (isset($this->notifications[$principalUri])) {
              return $this->notifications[$principalUri];
          }
          return array();
  
      }
  
      /**
       * This deletes a specific notifcation.
       *
       * This may be called by a client once it deems a notification handled.
       *
       * @param string $principalUri
       * @param Sabre\CalDAV\Notifications\INotificationType $notification
       * @return void
       */
      public function deleteNotification($principalUri, CalDAV\Notifications\INotificationType $notification) {
  
          foreach($this->notifications[$principalUri] as $key=>$value) {
              if ($notification === $value) {
                  unset($this->notifications[$principalUri][$key]);
              }
          }
  
      }
  
      /**
       * Updates the list of shares.
       *
       * The first array is a list of people that are to be added to the
       * calendar.
       *
       * Every element in the add array has the following properties:
       *   * href - A url. Usually a mailto: address
       *   * commonName - Usually a first and last name, or false
       *   * summary - A description of the share, can also be false
       *   * readOnly - A boolean value
       *
       * Every element in the remove array is just the address string.
       *
       * Note that if the calendar is currently marked as 'not shared' by and
       * this method is called, the calendar should be 'upgraded' to a shared
       * calendar.
       *
       * @param mixed $calendarId
       * @param array $add
       * @param array $remove
       * @return void
       */
      public function updateShares($calendarId, array $add, array $remove) {
  
          if (!isset($this->shares[$calendarId])) {
              $this->shares[$calendarId] = array();
          }
  
          foreach($add as $val) {
              $val['status'] = CalDAV\SharingPlugin::STATUS_NORESPONSE;
              $this->shares[$calendarId][] = $val;
          }
  
          foreach($this->shares[$calendarId] as $k=>$share) {
  
              if (in_array($share['href'], $remove)) {
                  unset($this->shares[$calendarId][$k]);
              }
  
          }
  
          // Re-numbering keys
          $this->shares[$calendarId] = array_values($this->shares[$calendarId]);
  
      }
  
      /**
       * Returns the list of people whom this calendar is shared with.
       *
       * Every element in this array should have the following properties:
       *   * href - Often a mailto: address
       *   * commonName - Optional, for example a first + last name
       *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
       *   * readOnly - boolean
       *   * summary - Optional, a description for the share
       *
       * @param mixed $calendarId
       * @return array
       */
      public function getShares($calendarId) {
  
          if (!isset($this->shares[$calendarId])) {
              return array();
          }
  
          return $this->shares[$calendarId];
  
      }
  
      /**
       * This method is called when a user replied to a request to share.
       *
       * @param string href The sharee who is replying (often a mailto: address)
       * @param int status One of the SharingPlugin::STATUS_* constants
       * @param string $calendarUri The url to the calendar thats being shared
       * @param string $inReplyTo The unique id this message is a response to
       * @param string $summary A description of the reply
       * @return void
       */
      public function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null) {
  
          // This operation basically doesn't do anything yet
          if ($status === CalDAV\SharingPlugin::STATUS_ACCEPTED) {
              return 'calendars/blabla/calendar';
          }
  
      }
  
      /**
       * Publishes a calendar
       *
       * @param mixed $calendarId
       * @param bool $value
       * @return void
       */
      public function setPublishStatus($calendarId, $value) {
  
          foreach($this->calendars as $k=>$cal) {
              if ($cal['id'] === $calendarId) {
                  if (!$value) {
                      unset($cal['{http://calendarserver.org/ns/}publish-url']);
                  } else {
                      $cal['{http://calendarserver.org/ns/}publish-url'] = 'http://example.org/public/ ' . $calendarId . '.ics';
                  }
                  return;
              }
          }
  
          throw new DAV\Exception('Calendar with id "' . $calendarId . '" not found');
  
      }
  
  }