<?php
/*
 * Copyright 2005 - 2015  Zarafa B.V. and its licensors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

?>
<?php

class Meetingrequest {
	/*
	 * NOTE
	 *
	 * This class is designed to modify and update meeting request properties
	 * and to search for linked appointments in the calendar. It does not
	 * - set standard properties like subject or location
	 * - commit property changes through savechanges() (except in accept() and decline())
	 *
	 * To set all the other properties, just handle the item as any other appointment
	 * item. You aren't even required to set those properties before or after using
	 * this class. If you update properties before REsending a meeting request (ie with
	 * a time change) you MUST first call updateMeetingRequest() so the internal counters
	 * can be updated. You can then submit the message any way you like.
	 *
	 */
	 
	/*
	 * How to use
	 * ----------
	 *
	 * Sending a meeting request:
	 * - Create appointment item as normal, but as 'tentative'
	 *   (this is the state of the item when the receiving user has received but
	 *    not accepted the item)
	 * - Set recipients as normally in e-mails
	 * - Create Meetingrequest class instance
	 * - Call setMeetingRequest(), this turns on all the meeting request properties in the
	 *   calendar item
	 * - Call sendMeetingRequest(), this sends a copy of the item with some extra properties
	 *
	 * Updating a meeting request:
	 * - Create Meetingrequest class instance
	 * - Call updateMeetingRequest(), this updates the counters
	 * - Call sendMeetingRequest()
	 *
	 * Clicking on a an e-mail:
	 * - Create Meetingrequest class instance
	 * - Check isMeetingRequest(), if true:
	 *   - Check isLocalOrganiser(), if true then ignore the message
	 *   - Check isInCalendar(), if not call doAccept(true, false, false). This adds the item in your 
	 *     calendar as tentative without sending a response
	 *   - Show Accept, Tentative, Decline buttons
	 *   - When the user presses Accept, Tentative or Decline, call doAccept(false, true, true), 
	 *     doAccept(true, true, true) or doDecline(true) respectively to really accept or decline and
	 *     send the response. This will remove the request from your inbox.
	 * - Check isMeetingRequestResponse, if true:
	 *   - Check isLocalOrganiser(), if not true then ignore the message
	 *   - Call processMeetingRequestResponse()
	 *     This will update the trackstatus of all recipients, and set the item to 'busy'
	 *     when all the recipients have accepted.
	 * - Check isMeetingCancellation(), if true:
	 *   - Check isLocalOrganiser(), if true then ignore the message
	 *   - Check isInCalendar(), if not, then ignore
	 *     Call processMeetingCancellation()
	 *   - Show 'Remove item' button to user
	 *   - When userpresses button, call doCancel(), which removes the item from your 
	 *     calendar and deletes the message
	 */
	 
	// All properties for a recipient that are interesting
	var $recipprops = Array(
		PR_ENTRYID,
		PR_DISPLAY_NAME,
		PR_EMAIL_ADDRESS,
		PR_RECIPIENT_ENTRYID,
		PR_RECIPIENT_TYPE,
		PR_SEND_INTERNET_ENCODING,
		PR_SEND_RICH_INFO,
		PR_RECIPIENT_DISPLAY_NAME,
		PR_ADDRTYPE,
		PR_DISPLAY_TYPE,
		PR_RECIPIENT_TRACKSTATUS,
		PR_RECIPIENT_TRACKSTATUS_TIME,
		PR_RECIPIENT_FLAGS,
		PR_ROWID,
		PR_OBJECT_TYPE,
		PR_SEARCH_KEY
	);
	
	/**
	 * Indication whether the setting of resources in a Meeting Request is success (false) or if it 
	 * has failed (integer).
	 */
	var $errorSetResource;
	
	/**
	 * Constructor
	 *
	 * Takes a store and a message. The message is an appointment item
	 * that should be converted into a meeting request or an incoming
	 * e-mail message that is a meeting request.
	 *
	 * The $session variable is optional, but required if the following features
	 * are to be used:
	 *
	 * - Sending meeting requests for meetings that are not in your own store
	 * - Sending meeting requests to resources, resource availability checking and resource freebusy updates
	 */
	 
	function Meetingrequest($store, $message, $session = false, $enableDirectBooking = true) 
	{
		$this->store = $store;
		$this->message = $message;
		$this->session = $session;
		// This variable string saves time information for the MR.
		$this->meetingTimeInfo = false;
		$this->enableDirectBooking = $enableDirectBooking;

		$properties["goid"] = "PT_BINARY:PSETID_Meeting:0x3";
		$properties["goid2"] = "PT_BINARY:PSETID_Meeting:0x23";
		$properties["type"] = "PT_STRING8:PSETID_Meeting:0x24";
		$properties["meetingrecurring"] = "PT_BOOLEAN:PSETID_Meeting:0x5";
		$properties["unknown2"] = "PT_BOOLEAN:PSETID_Meeting:0xa";
		$properties["attendee_critical_change"] = "PT_SYSTIME:PSETID_Meeting:0x1";
		$properties["owner_critical_change"] = "PT_SYSTIME:PSETID_Meeting:0x1a";
		$properties["meetingstatus"] = "PT_LONG:PSETID_Appointment:0x8217";
		$properties["responsestatus"] = "PT_LONG:PSETID_Appointment:0x8218";
		$properties["unknown6"] = "PT_LONG:PSETID_Meeting:0x4";
		$properties["replytime"] = "PT_SYSTIME:PSETID_Appointment:0x8220";
		$properties["usetnef"] = "PT_BOOLEAN:PSETID_Common:0x8582";
		$properties["recurrence_data"] = "PT_BINARY:PSETID_Appointment:0x8216";
		$properties["reminderminutes"] = "PT_LONG:PSETID_Common:0x8501";
		$properties["reminderset"] = "PT_BOOLEAN:PSETID_Common:0x8503";
		$properties["sendasical"] = "PT_BOOLEAN:PSETID_Appointment:0x8200";
		$properties["updatecounter"] = "PT_LONG:PSETID_Appointment:0x8201";					// AppointmentSequenceNumber
		$properties["last_updatecounter"] = "PT_LONG:PSETID_Appointment:0x8203";			// AppointmentLastSequence
		$properties["unknown7"] = "PT_LONG:PSETID_Appointment:0x8202";
		$properties["busystatus"] = "PT_LONG:PSETID_Appointment:0x8205";
		$properties["intendedbusystatus"] = "PT_LONG:PSETID_Appointment:0x8224";
		$properties["start"] = "PT_SYSTIME:PSETID_Appointment:0x820d";
		$properties["responselocation"] = "PT_STRING8:PSETID_Meeting:0x2";
		$properties["location"] = "PT_STRING8:PSETID_Appointment:0x8208";
		$properties["requestsent"] = "PT_BOOLEAN:PSETID_Appointment:0x8229";		// PidLidFInvited, MeetingRequestWasSent
		$properties["startdate"] = "PT_SYSTIME:PSETID_Appointment:0x820d";
		$properties["duedate"] = "PT_SYSTIME:PSETID_Appointment:0x820e";
		$properties["commonstart"] = "PT_SYSTIME:PSETID_Common:0x8516";
		$properties["commonend"] = "PT_SYSTIME:PSETID_Common:0x8517";
		$properties["recurring"] = "PT_BOOLEAN:PSETID_Appointment:0x8223";
		$properties["clipstart"] = "PT_SYSTIME:PSETID_Appointment:0x8235";
		$properties["clipend"] = "PT_SYSTIME:PSETID_Appointment:0x8236";
		$properties["start_recur_date"] = "PT_LONG:PSETID_Meeting:0xD";				// StartRecurTime
		$properties["start_recur_time"] = "PT_LONG:PSETID_Meeting:0xE";				// StartRecurTime
		$properties["end_recur_date"] = "PT_LONG:PSETID_Meeting:0xF";				// EndRecurDate
		$properties["end_recur_time"] = "PT_LONG:PSETID_Meeting:0x10";				// EndRecurTime
		$properties["is_exception"] = "PT_BOOLEAN:PSETID_Meeting:0xA";				// LID_IS_EXCEPTION
		$properties["apptreplyname"] = "PT_STRING8:PSETID_Appointment:0x8230";
		// Propose new time properties
		$properties["proposed_start_whole"] = "PT_SYSTIME:PSETID_Appointment:0x8250";
		$properties["proposed_end_whole"] = "PT_SYSTIME:PSETID_Appointment:0x8251";
		$properties["proposed_duration"] = "PT_LONG:PSETID_Appointment:0x8256";
		$properties["counter_proposal"] = "PT_BOOLEAN:PSETID_Appointment:0x8257";
		$properties["recurring_pattern"] = "PT_STRING8:PSETID_Appointment:0x8232";
		$properties["basedate"] = "PT_SYSTIME:PSETID_Appointment:0x8228";
		$properties["meetingtype"] = "PT_LONG:PSETID_Meeting:0x26";
		$properties["timezone_data"] = "PT_BINARY:PSETID_Appointment:0x8233";
		$properties["timezone"] = "PT_STRING8:PSETID_Appointment:0x8234";
		$properties["toattendeesstring"] = "PT_STRING8:PSETID_Appointment:0x823B";
		$properties["ccattendeesstring"] = "PT_STRING8:PSETID_Appointment:0x823C";
		$this->proptags = getPropIdsFromStrings($store, $properties);
	}

	/**
	 * Sets the direct booking property. This is an alternative to the setting of the direct booking
	 * property through the constructor. However, setting it in the constructor is prefered.
	 * @param Boolean $directBookingSetting
	 * 
	 */
	function setDirectBooking($directBookingSetting)
	{
		$this->enableDirectBooking = $directBookingSetting;
	}

	/**
	 * Returns TRUE if the message pointed to is an incoming meeting request and should
	 * therefore be replied to with doAccept or doDecline()
	 */
	function isMeetingRequest()
	{
		$props = mapi_getprops($this->message, Array(PR_MESSAGE_CLASS));
		
		if(isset($props[PR_MESSAGE_CLASS]) && $props[PR_MESSAGE_CLASS] == "IPM.Schedule.Meeting.Request")
			return true;
	}
	
	/**
	 * Returns TRUE if the message pointed to is a returning meeting request response
	 */
	function isMeetingRequestResponse()
	{
		$props = mapi_getprops($this->message, Array(PR_MESSAGE_CLASS));
		
		if(isset($props[PR_MESSAGE_CLASS]) && strpos($props[PR_MESSAGE_CLASS], "IPM.Schedule.Meeting.Resp") === 0)
			return true;
	}
	
	/**
	 * Returns TRUE if the message pointed to is a cancellation request
	 */
	function isMeetingCancellation()
	{
		$props = mapi_getprops($this->message, Array(PR_MESSAGE_CLASS));
		
		if(isset($props[PR_MESSAGE_CLASS]) && $props[PR_MESSAGE_CLASS] == "IPM.Schedule.Meeting.Canceled")
			return true;
	}


	/**
	 * Process an incoming meeting request response as Delegate. This will updates the appointment
	 * in Organiser's calendar.
	 * @returns the entryids(storeid, parententryid, entryid, also basedate if response is occurrence) 
	 * of corresponding meeting in Calendar
	 */
	function processMeetingRequestResponseAsDelegate()
	{
		if(!$this->isMeetingRequestResponse())
			return;

		$messageprops = mapi_getprops($this->message);

		$goid2 = $messageprops[$this->proptags['goid2']];

		if(!isset($goid2) || !isset($messageprops[PR_SENT_REPRESENTING_EMAIL_ADDRESS]))
			return;

		// Find basedate in GlobalID(0x3), this can be a response for an occurrence
		$basedate = $this->getBasedateFromGlobalID($messageprops[$this->proptags['goid']]);

		if (isset($messageprops[PR_RCVD_REPRESENTING_NAME])) {
			$delegatorStore = $this->getDelegatorStore($messageprops);
			$userStore = $delegatorStore['store'];
			$calFolder = $delegatorStore['calFolder'];
	
			if($calFolder){
				$calendaritems = $this->findCalendarItems($goid2, $calFolder);

				// $calendaritems now contains the ENTRYID's of all the calendar items to which
				// this meeting request points.
				
				// Open the calendar items, and update all the recipients of the calendar item that match
				// the email address of the response.
				if (!empty($calendaritems)) {
					 return $this->processResponse($userStore, $calendaritems[0], $basedate, $messageprops);
				}else{
					return false;
				}
			}
		}
	}


	/**
	 * Process an incoming meeting request response. This updates the appointment
	 * in your calendar to show whether the user has accepted or declined.
	 * @returns the entryids(storeid, parententryid, entryid, also basedate if response is occurrence) 
	 * of corresponding meeting in Calendar
	 */
	function processMeetingRequestResponse()
	{
		if(!$this->isLocalOrganiser())
			return;

		if(!$this->isMeetingRequestResponse())
			return;

		// Get information we need from the response message
		$messageprops = mapi_getprops($this->message, Array(
													$this->proptags['goid'],
													$this->proptags['goid2'],
													PR_OWNER_APPT_ID, 
													PR_SENT_REPRESENTING_EMAIL_ADDRESS, 
													PR_SENT_REPRESENTING_NAME,
													PR_SENT_REPRESENTING_ADDRTYPE,
													PR_SENT_REPRESENTING_ENTRYID,
													PR_MESSAGE_DELIVERY_TIME,
													PR_MESSAGE_CLASS,
													PR_PROCESSED,
													$this->proptags['proposed_start_whole'],
													$this->proptags['proposed_end_whole'],
													$this->proptags['proposed_duration'],
													$this->proptags['counter_proposal'],
													$this->proptags['attendee_critical_change']));

		$goid2 = $messageprops[$this->proptags['goid2']];

		if(!isset($goid2) || !isset($messageprops[PR_SENT_REPRESENTING_EMAIL_ADDRESS]))
			return;

		// Find basedate in GlobalID(0x3), this can be a response for an occurrence
		$basedate = $this->getBasedateFromGlobalID($messageprops[$this->proptags['goid']]);

		$calendaritems = $this->findCalendarItems($goid2);
		
		// $calendaritems now contains the ENTRYID's of all the calendar items to which
		// this meeting request points.
		
		// Open the calendar items, and update all the recipients of the calendar item that match
		// the email address of the response.
		if (!empty($calendaritems)) {
			return $this->processResponse($this->store, $calendaritems[0], $basedate, $messageprops);
		}else{
			return false;
		}
	}

	/**
	 * Process every incoming MeetingRequest response.This updates the appointment
	 * in your calendar to show whether the user has accepted or declined.
	 *@param resource $store contains the userStore in which the meeting is created
	 *@param $entryid contains the ENTRYID of the calendar items to which this meeting request points.
	 *@param boolean $basedate if present the create an exception
	 *@param array $messageprops contains m3/17/2010essage properties.
	 *@return entryids(storeid, parententryid, entryid, also basedate if response is occurrence) of corresponding meeting in Calendar
	 */
	function processResponse($store, $entryid, $basedate, $messageprops)
	{	
		$data = array();
		$senderentryid = $messageprops[PR_SENT_REPRESENTING_ENTRYID];
		$messageclass = $messageprops[PR_MESSAGE_CLASS];
		$deliverytime = $messageprops[PR_MESSAGE_DELIVERY_TIME];

		// Open the calendar item, find the sender in the recipient table and update all the recipients of the calendar item that match
		// the email address of the response.
		$calendaritem = mapi_msgstore_openentry($store, $entryid);
		$calendaritemProps = mapi_getprops($calendaritem, array($this->proptags['recurring'], PR_STORE_ENTRYID, PR_PARENT_ENTRYID, PR_ENTRYID, $this->proptags['updatecounter']));

		$data["storeid"] = bin2hex($calendaritemProps[PR_STORE_ENTRYID]);
		$data["parententryid"] = bin2hex($calendaritemProps[PR_PARENT_ENTRYID]);
		$data["entryid"] = bin2hex($calendaritemProps[PR_ENTRYID]);
		$data["basedate"] = $basedate;
		$data["updatecounter"] = isset($calendaritemProps[$this->proptags['updatecounter']]) ? $calendaritemProps[$this->proptags['updatecounter']] : 0;

		/**
		 * Check if meeting is updated or not in organizer's calendar
		 */
		$data["meeting_updated"] = $this->isMeetingUpdated();

		if(isset($messageprops[PR_PROCESSED]) && $messageprops[PR_PROCESSED] == true) {
			// meeting is already processed
			return $data;
		} else {
			mapi_setprops($this->message, Array(PR_PROCESSED => true));
			mapi_savechanges($this->message);
		}

		// if meeting is updated in organizer's calendar then we don't need to process
		// old response
		if($data['meeting_updated'] === true) {
			return $data;
		}

		// If basedate is found, then create/modify exception msg and do processing 
		if ($basedate && $calendaritemProps[$this->proptags['recurring']]) {
			$recurr = new Recurrence($store, $calendaritem);

			// Copy properties from meeting request
			$exception_props = mapi_getprops($this->message, array(PR_OWNER_APPT_ID, 
												$this->proptags['proposed_start_whole'],
												$this->proptags['proposed_end_whole'],
												$this->proptags['proposed_duration'],
												$this->proptags['counter_proposal']
											));

			// Create/modify exception
			if($recurr->isException($basedate)) {
				$recurr->modifyException($exception_props, $basedate);
			} else {
				// When we are creating an exception we need copy recipients from main recurring item
				$recipTable =  mapi_message_getrecipienttable($calendaritem);
				$recips = mapi_table_queryallrows($recipTable, $this->recipprops);

				// Retrieve actual start/due dates from calendar item.
				$exception_props[$this->proptags['startdate']] = $recurr->getOccurrenceStart($basedate);
				$exception_props[$this->proptags['duedate']] = $recurr->getOccurrenceEnd($basedate);

				$recurr->createException($exception_props, $basedate, false, $recips);
			}

			mapi_message_savechanges($calendaritem);

			$attach = $recurr->getExceptionAttachment($basedate);
			if ($attach) {
				$recurringItem = $calendaritem;
				$calendaritem = mapi_attach_openobj($attach, MAPI_MODIFY);
			} else {
				return false;
			}
		}
	
		// Get the recipients of the calendar item
		$reciptable = mapi_message_getrecipienttable($calendaritem);
		$recipients = mapi_table_queryallrows($reciptable, $this->recipprops);

		// FIXME we should look at the updatecounter property and compare it
		// to the counter in the recipient to see if this update is actually
		// newer than the status in the calendar item			
		$found = false;
		
		$totalrecips = 0;
		$acceptedrecips = 0;
		foreach($recipients as $recipient) {
			$totalrecips++;
			if(isset($recipient[PR_ENTRYID]) && $this->compareABEntryIDs($recipient[PR_ENTRYID],$senderentryid)) {
				$found = true;

				/**
				 * If value of attendee_critical_change on meeting response mail is less than PR_RECIPIENT_TRACKSTATUS_TIME
				 * on the corresponding recipientRow of meeting then we ignore this response mail.
				 */
				if (isset($recipient[PR_RECIPIENT_TRACKSTATUS_TIME]) && ($messageprops[$this->proptags['attendee_critical_change']] < $recipient[PR_RECIPIENT_TRACKSTATUS_TIME])) {
					continue;
				}

				// The email address matches, update the row
				$recipient[PR_RECIPIENT_TRACKSTATUS] = $this->getTrackStatus($messageclass);
				$recipient[PR_RECIPIENT_TRACKSTATUS_TIME] = $messageprops[$this->proptags['attendee_critical_change']];

				// If this is a counter proposal, set the proposal properties in the recipient row
				if(isset($messageprops[$this->proptags['counter_proposal']]) && $messageprops[$this->proptags['counter_proposal']]){
					$recipient[PR_PROPOSENEWTIME_START] = $messageprops[$this->proptags['proposed_start_whole']];
					$recipient[PR_PROPOSENEWTIME_END] = $messageprops[$this->proptags['proposed_end_whole']];
					$recipient[PR_PROPOSEDNEWTIME] = $messageprops[$this->proptags['counter_proposal']];
				}

				mapi_message_modifyrecipients($calendaritem, MODRECIP_MODIFY, Array($recipient));
			}
			if(isset($recipient[PR_RECIPIENT_TRACKSTATUS]) && $recipient[PR_RECIPIENT_TRACKSTATUS] == olRecipientTrackStatusAccepted)
				$acceptedrecips++;
		}
	
		// If the recipient was not found in the original calendar item, 
		// then add the recpient as a new optional recipient
		if(!$found) {
			$recipient = Array();
			$recipient[PR_ENTRYID] = $messageprops[PR_SENT_REPRESENTING_ENTRYID];
			$recipient[PR_EMAIL_ADDRESS] = $messageprops[PR_SENT_REPRESENTING_EMAIL_ADDRESS];
			$recipient[PR_DISPLAY_NAME] = $messageprops[PR_SENT_REPRESENTING_NAME];
			$recipient[PR_ADDRTYPE] = $messageprops[PR_SENT_REPRESENTING_ADDRTYPE];
			$recipient[PR_RECIPIENT_TYPE] = MAPI_CC;
			$recipient[PR_SEARCH_KEY] = $messageprops[PR_SENT_REPRESENTING_SEARCH_KEY];
			$recipient[PR_RECIPIENT_TRACKSTATUS] = $this->getTrackStatus($messageclass);
			$recipient[PR_RECIPIENT_TRACKSTATUS_TIME] = $deliverytime;

			// If this is a counter proposal, set the proposal properties in the recipient row
			if(isset($messageprops[$this->proptags['counter_proposal']])){
				$recipient[PR_PROPOSENEWTIME_START] = $messageprops[$this->proptags['proposed_start_whole']];
				$recipient[PR_PROPOSENEWTIME_END] = $messageprops[$this->proptags['proposed_end_whole']];
				$recipient[PR_PROPOSEDNEWTIME] = $messageprops[$this->proptags['counter_proposal']];
			}

			mapi_message_modifyrecipients($calendaritem, MODRECIP_ADD, Array($recipient));
			$totalrecips++;
			if($recipient[PR_RECIPIENT_TRACKSTATUS] == olRecipientTrackStatusAccepted)
				$acceptedrecips++;
		}

//TODO: Upate counter proposal number property on message
/*
If it is the first time this attendee has proposed a new date/time, increment the value of the PidLidAppointmentProposalNumber property on the organizer’s meeting object, by 0x00000001. If this property did not previously exist on the organizer’s meeting object, it MUST be set with a value of 0x00000001.
*/
		// If this is a counter proposal, set the counter proposal indicator boolean
		if(isset($messageprops[$this->proptags['counter_proposal']])){
			$props = Array();
			if($messageprops[$this->proptags['counter_proposal']]){
				$props[$this->proptags['counter_proposal']] = true;
			}else{
				$props[$this->proptags['counter_proposal']] = false;
			}
			
			mapi_message_setprops($calendaritem, $props);
		}
		
		mapi_message_savechanges($calendaritem);
		if (isset($attach)) {
			mapi_message_savechanges($attach);
			mapi_message_savechanges($recurringItem);
		}

		return $data;
	}


	/**
	 * Process an incoming meeting request cancellation. This updates the 
	 * appointment in your calendar to show that the meeting has been cancelled.
	 */
	function processMeetingCancellation()
	{
		if($this->isLocalOrganiser())
			return;
			
		if(!$this->isMeetingCancellation())
			return;

		if(!$this->isInCalendar())
			return;

		$listProperties = $this->proptags;
		$listProperties['subject'] = PR_SUBJECT;
		$listProperties['sent_representing_name'] = PR_SENT_REPRESENTING_NAME;
		$listProperties['sent_representing_address_type'] = PR_SENT_REPRESENTING_ADDRTYPE;
		$listProperties['sent_representing_email_address'] = PR_SENT_REPRESENTING_EMAIL_ADDRESS;
		$listProperties['sent_representing_entryid'] = PR_SENT_REPRESENTING_ENTRYID;
		$listProperties['sent_representing_search_key'] = PR_SENT_REPRESENTING_SEARCH_KEY;
		$listProperties['rcvd_representing_name'] = PR_RCVD_REPRESENTING_NAME;
		$messageprops = mapi_getprops($this->message, $listProperties);
		$store = $this->store;

		$goid = $messageprops[$this->proptags['goid']];	//GlobalID (0x3)
		if(!isset($goid))
			return;

		if (isset($messageprops[PR_RCVD_REPRESENTING_NAME])){
			$delegatorStore = $this->getDelegatorStore($messageprops);
			$store = $delegatorStore['store'];
			$calFolder = $delegatorStore['calFolder'];
		} else {
			$calFolder = $this->openDefaultCalendar();
		}

		// First, find the items in the calendar by GOID
		$calendaritems = $this->findCalendarItems($goid, $calFolder);
		$basedate = $this->getBasedateFromGlobalID($goid);

		if ($basedate) {
			// Calendaritems with GlobalID were not found, so find main recurring item using CleanGlobalID(0x23)
			if (empty($calendaritems)) {
				// This meeting req is of an occurrance
				$goid2 = $messageprops[$this->proptags['goid2']];

				// First, find the items in the calendar by GOID
				$calendaritems = $this->findCalendarItems($goid2);
				foreach($calendaritems as $entryid) {
					// Open each calendar item and set the properties of the cancellation object
					$calendaritem = mapi_msgstore_openentry($store, $entryid);

					if ($calendaritem){
						$calendaritemProps = mapi_getprops($calendaritem, array($this->proptags['recurring']));
						if ($calendaritemProps[$this->proptags['recurring']]){
							$recurr = new Recurrence($store, $calendaritem);

							// Set message class
							$messageprops[PR_MESSAGE_CLASS] = 'IPM.Appointment';

							if($recurr->isException($basedate))
								$recurr->modifyException($messageprops, $basedate);
							else
								$recurr->createException($messageprops, $basedate);
						}
						mapi_savechanges($calendaritem);
					}
				}
			}
		}

		if (!isset($calendaritem)) {
			foreach($calendaritems as $entryid) {
				// Open each calendar item and set the properties of the cancellation object
				$calendaritem = mapi_msgstore_openentry($store, $entryid);
				mapi_message_setprops($calendaritem, $messageprops);
				mapi_savechanges($calendaritem);
			}
		}
	}

	/**
	 * Returns true if the item is already in the calendar
	 */
	function isInCalendar() {
		$messageprops = mapi_getprops($this->message, Array($this->proptags['goid'], $this->proptags['goid2'], PR_RCVD_REPRESENTING_NAME));
		$goid = $messageprops[$this->proptags['goid']];
		$goid2 = $messageprops[$this->proptags['goid2']];

		$basedate = $this->getBasedateFromGlobalID($goid);

		if (isset($messageprops[PR_RCVD_REPRESENTING_NAME])){
			$delegatorStore = $this->getDelegatorStore($messageprops);
			$calFolder = $delegatorStore['calFolder'];
		} else {
			$calFolder = $this->openDefaultCalendar();
		}
		/**
		 * If basedate is found in globalID, then there are two possibilities.
		 * case 1) User has only this occurrence OR
		 * case 2) User has recurring item and has received an update for an occurrence
		 */
		if ($basedate) {
			// First try with GlobalID(0x3) (case 1)
			$entryid = $this->findCalendarItems($goid, $calFolder);
			// If not found then try with CleanGlobalID(0x23) (case 2)
			if (!is_array($entryid))
				$entryid = $this->findCalendarItems($goid2, $calFolder);
		} else {
			$entryid = $this->findCalendarItems($goid2, $calFolder);
		}

		return is_array($entryid);
	}
		
	/**
	 * Accepts the meeting request by moving the item to the calendar
	 * and sending a confirmation message back to the sender. If $tentative
	 * is TRUE, then the item is accepted tentatively. After accepting, you
	 * can't use this class instance any more. The message is closed. If you
	 * specify TRUE for 'move', then the item is actually moved (from your
	 * inbox probably) to the calendar. If you don't, it is copied into
     * your calendar.
	 *@param boolean $tentative true if user as tentative accepted the meeting
	 *@param boolean $sendresponse true if a response has to be send to organizer
	 *@param boolean $move true if the meeting request should be moved to the deleted items after processing
	 *@param string $newProposedStartTime contains starttime if user has proposed other time
	 *@param string $newProposedEndTime contains endtime if user has proposed other time
	 *@param string $basedate start of day of occurrence for which user has accepted the recurrent meeting
	 *@return string $entryid entryid of item which created/updated in calendar
	 */
	function doAccept($tentative, $sendresponse, $move, $newProposedStartTime=false, $newProposedEndTime=false, $body=false, $userAction = false, $store=false, $basedate = false)
	{
		if($this->isLocalOrganiser())
			return false;

		// Remove any previous calendar items with this goid and appt id
		$messageprops = mapi_getprops($this->message, Array(PR_ENTRYID, PR_MESSAGE_CLASS, $this->proptags['goid'], $this->proptags['goid2'], PR_OWNER_APPT_ID, $this->proptags['updatecounter'], PR_PROCESSED, $this->proptags['recurring'], $this->proptags['intendedbusystatus'], PR_RCVD_REPRESENTING_NAME));

		/**
		 *	if this function is called automatically with meeting request object then there will be
		 *	two possibilitites 
		 *	1) meeting request is opened first time, in this case make a tentative appointment in 
				recipient's calendar
		 *	2) after this every subsequest request to open meeting request will not do any processing
		 */
		if($messageprops[PR_MESSAGE_CLASS] == "IPM.Schedule.Meeting.Request" && $userAction == false) {
			if(isset($messageprops[PR_PROCESSED]) && $messageprops[PR_PROCESSED] == true) {
				// if meeting request is already processed then don't do anything
				return false;
			} else {
				mapi_setprops($this->message, Array(PR_PROCESSED => true));
				mapi_message_savechanges($this->message);
			}
		}

		// If this meeting request is received by a delegate then open delegator's store.
		if (isset($messageprops[PR_RCVD_REPRESENTING_NAME])) {
			$delegatorStore = $this->getDelegatorStore($messageprops);

			$store = $delegatorStore['store'];
			$calFolder = $delegatorStore['calFolder'];
		} else {
			$calFolder = $this->openDefaultCalendar();
			$store = $this->store;
		}

		return $this->accept($tentative, $sendresponse, $move, $newProposedStartTime, $newProposedEndTime, $body, $userAction, $store, $calFolder, $basedate);
	}

	function accept($tentative, $sendresponse, $move, $newProposedStartTime=false, $newProposedEndTime=false, $body=false, $userAction = false, $store, $calFolder, $basedate = false)
	{
		$messageprops = mapi_getprops($this->message);
		$isDelegate = false;

		if (isset($messageprops[PR_DELEGATED_BY_RULE]))
			$isDelegate = true;

		$goid = $messageprops[$this->proptags['goid2']];

		// Retrieve basedate from globalID, if it is not recieved as argument
		if (!$basedate)
			$basedate = $this->getBasedateFromGlobalID($messageprops[$this->proptags['goid']]);

		if ($sendresponse)
			$this->createResponse($tentative ? olResponseTentative : olResponseAccepted, $newProposedStartTime, $newProposedEndTime, $body, $store, $basedate, $calFolder);

		$entryids = $this->findCalendarItems($goid, $calFolder);

		if(is_array($entryids)) {
			// Only check the first, there should only be one anyway...
			$previtem = mapi_msgstore_openentry($store, $entryids[0]);
			$prevcounterprops = mapi_getprops($previtem, array($this->proptags['updatecounter']));

			// Check if the existing item has an updatecounter that is lower than the request we are processing. If not, then we ignore this call, since the
			// meeting request is out of date.
			/*
				if(message_counter < appointment_counter) do_nothing
				if(message_counter == appointment_counter) do_something_if_the_user_tells_us (userAction == true)
				if(message_counter > appointment_counter) do_something_even_automatically
			*/
			if(isset($prevcounterprops[$this->proptags['updatecounter']]) && $messageprops[$this->proptags['updatecounter']] < $prevcounterprops[$this->proptags['updatecounter']]) {
				return false;
			} else if(isset($prevcounterprops[$this->proptags['updatecounter']]) && $messageprops[$this->proptags['updatecounter']] == $prevcounterprops[$this->proptags['updatecounter']]) {
				if($userAction == false && !$basedate) {
					return false;
				}
			}
		}

		// set counter proposal properties in calendar item when proposing new time
		// @FIXME this can be moved before call to createResponse function so that function doesn't need to recalculate duration
		$proposeNewTimeProps = array();
		if($newProposedStartTime && $newProposedEndTime) {
			$proposeNewTimeProps[$this->proptags['proposed_start_whole']] = $newProposedStartTime;
			$proposeNewTimeProps[$this->proptags['proposed_end_whole']] = $newProposedEndTime;
			$proposeNewTimeProps[$this->proptags['proposed_duration']] = round($newProposedEndTime - $newProposedStartTime) / 60;
			$proposeNewTimeProps[$this->proptags['counter_proposal']] = true;
		}

		/**
		 * Further processing depends on what user is receiving. User can receive recurring item, a single occurrence or a normal meeting.
		 * 1) If meeting req is of recurrence then we find all the occurrence in calendar because in past user might have recivied one or few occurrences.
		 * 2) If single occurrence then find occurrence itself using globalID and if item is not found then user cleanGlobalID to find main recurring item
		 * 3) Normal meeting req are handled normally has they were handled previously.
		 *
		 * Also user can respond(accept/decline) to item either from previewpane or from calendar by opening the item. If user is responding the meeting from previewpane
		 * and that item is not found in calendar then item is move else item is opened and all properties, attachments and recipient are copied from meeting request.
		 * If user is responding from calendar then item is opened and properties are set such as meetingstatus, responsestatus, busystatus etc.
		 */
		if ($messageprops[PR_MESSAGE_CLASS] == "IPM.Schedule.Meeting.Request") {
			// While processing the item mark it as read.
			mapi_message_setreadflag($this->message, SUPPRESS_RECEIPT);

			// This meeting request item is recurring, so find all occurrences and saves them all as exceptions to this meeting request item.
			if ($messageprops[$this->proptags['recurring']] == true) {
				$calendarItem = false;

				// Find main recurring item based on GlobalID (0x3)
				$items = $this->findCalendarItems($messageprops[$this->proptags['goid2']], $calFolder);
				if (is_array($items)) {
					foreach($items as $key => $entryid)
						$calendarItem = mapi_msgstore_openentry($store, $entryid);
				}

				// Recurring item not found, so create new meeting in Calendar
				if (!$calendarItem)
					$calendarItem = mapi_folder_createmessage($calFolder);

				// Copy properties
				$props = mapi_getprops($this->message);
				$props[PR_MESSAGE_CLASS] = 'IPM.Appointment';
				$props[$this->proptags['meetingstatus']] = olMeetingReceived;
				// when we are automatically processing the meeting request set responsestatus to olResponseNotResponded
				$props[$this->proptags['responsestatus']] = $userAction ? ($tentative ? olResponseTentative : olResponseAccepted) : olResponseNotResponded;

				if (isset($props[$this->proptags['intendedbusystatus']])) {
					if($tentative && $props[$this->proptags['intendedbusystatus']] !== fbFree) {
						$props[$this->proptags['busystatus']] = $tentative;
					} else {
						$props[$this->proptags['busystatus']] = $props[$this->proptags['intendedbusystatus']];
					}
					// we already have intendedbusystatus value in $props so no need to copy it
				} else {
					$props[$this->proptags['busystatus']] = $tentative ? fbTentative : fbBusy;
				}

				if($userAction) {
					// if user has responded then set replytime
					$props[$this->proptags['replytime']] = time();
				}

				mapi_setprops($calendarItem, $props);

				// Copy attachments too
				$this->replaceAttachments($this->message, $calendarItem);
				// Copy recipients too
				$this->replaceRecipients($this->message, $calendarItem, $isDelegate);

				// Find all occurrences based on CleanGlobalID (0x23)
				$items = $this->findCalendarItems($messageprops[$this->proptags['goid2']], $calFolder, true);
				if (is_array($items)) {
					// Save all existing occurrence as exceptions
					foreach($items as $entryid) {
						// Open occurrence
						$occurrenceItem = mapi_msgstore_openentry($store, $entryid);

						// Save occurrence into main recurring item as exception
						if ($occurrenceItem) {
							$occurrenceItemProps = mapi_getprops($occurrenceItem, array($this->proptags['goid'], $this->proptags['recurring']));

							// Find basedate of occurrence item
							$basedate = $this->getBasedateFromGlobalID($occurrenceItemProps[$this->proptags['goid']]);
							if ($basedate && $occurrenceItemProps[$this->proptags['recurring']] != true)
								$this->acceptException($calendarItem, $occurrenceItem, $basedate, true, $tentative, $userAction, $store, $isDelegate);
						}
					}
				}
				mapi_savechanges($calendarItem);
				if ($move) {
					$wastebasket = $this->openDefaultWastebasket();
					mapi_folder_copymessages($calFolder, Array($props[PR_ENTRYID]), $wastebasket, MESSAGE_MOVE);
				}
				$entryid = $props[PR_ENTRYID];
			} else {
				/**
				 * This meeting request is not recurring, so can be an exception or normal meeting.
				 * If exception then find main recurring item and update exception
				 * If main recurring item is not found then put exception into Calendar as normal meeting.
				 */
				$calendarItem = false;

				// We found basedate in GlobalID of this meeting request, so this meeting request if for an occurrence.
				if ($basedate) {
					// Find main recurring item from CleanGlobalID of this meeting request
					$items = $this->findCalendarItems($messageprops[$this->proptags['goid2']], $calFolder);
					if (is_array($items)) {
						foreach($items as $key => $entryid) {
							$calendarItem = mapi_msgstore_openentry($store, $entryid);
						}
					}

					// Main recurring item is found, so now update exception
					if ($calendarItem) {
						$this->acceptException($calendarItem, $this->message, $basedate, $move, $tentative, $userAction, $store, $isDelegate);
						$calendarItemProps = mapi_getprops($calendarItem, array(PR_ENTRYID));
						$entryid = $calendarItemProps[PR_ENTRYID];
					}
				}

				if (!$calendarItem) {
					$items = $this->findCalendarItems($messageprops[$this->proptags['goid']], $calFolder);

					if (is_array($items))
						mapi_folder_deletemessages($calFolder, $items);

					if ($move) {
						// All we have to do is open the default calendar,
						// set the mesage class correctly to be an appointment item
						// and move it to the calendar folder
						$sourcefolder = $this->openParentFolder();

						/* create a new calendar message, and copy the message to there,
						   since we want to delete (move to wastebasket) the original message */
						$old_entryid = mapi_getprops($this->message, Array(PR_ENTRYID));
						$calmsg = mapi_folder_createmessage($calFolder);
						mapi_copyto($this->message, array(), array(), $calmsg); /* includes attachments and recipients */
						/* release old message */
						$message = null;

						$calItemProps = Array();
						$calItemProps[PR_MESSAGE_CLASS] = "IPM.Appointment";

						if (isset($messageprops[$this->proptags['intendedbusystatus']])) {
							if($tentative && $messageprops[$this->proptags['intendedbusystatus']] !== fbFree) {
								$calItemProps[$this->proptags['busystatus']] = $tentative;
							} else {
								$calItemProps[$this->proptags['busystatus']] = $messageprops[$this->proptags['intendedbusystatus']];
							}
							$calItemProps[$this->proptags['intendedbusystatus']] = $messageprops[$this->proptags['intendedbusystatus']];
						} else {
							$calItemProps[$this->proptags['busystatus']] = $tentative ? fbTentative : fbBusy;
						}

						// when we are automatically processing the meeting request set responsestatus to olResponseNotResponded
						$calItemProps[$this->proptags['responsestatus']] = $userAction ? ($tentative ? olResponseTentative : olResponseAccepted) : olResponseNotResponded;
						if($userAction) {
							// if user has responded then set replytime
							$calItemProps[$this->proptags['replytime']] = time();
						}

						mapi_setprops($calmsg, $proposeNewTimeProps + $calItemProps);

						// get properties which stores owner information in meeting request mails
						$props = mapi_getprops($calmsg, array(PR_SENT_REPRESENTING_ENTRYID, PR_SENT_REPRESENTING_NAME, PR_SENT_REPRESENTING_EMAIL_ADDRESS, PR_SENT_REPRESENTING_ADDRTYPE, PR_SENT_REPRESENTING_SEARCH_KEY));

						// add owner to recipient table
						$recips = array();
						$this->addOrganizer($props, $recips);

						if($isDelegate) {
							/**
							 * If user is delegate then remove that user from recipienttable of the MR.
							 * and delegate MR mail doesn't contain any of the attendees in recipient table.
							 * So, other required and optional attendees are added from 
							 * toattendeesstring and ccattendeesstring properties.
							 */
							$this->setRecipsFromString($recips, $messageprops[$this->proptags['toattendeesstring']], MAPI_TO);
							$this->setRecipsFromString($recips, $messageprops[$this->proptags['ccattendeesstring']], MAPI_CC);
							mapi_message_modifyrecipients($calmsg, 0, $recips);
						} else {
							mapi_message_modifyrecipients($calmsg, MODRECIP_ADD, $recips);
						}

						mapi_message_savechanges($calmsg);

						// Move the message to the wastebasket
						$wastebasket = $this->openDefaultWastebasket();
						mapi_folder_copymessages($sourcefolder, array($old_entryid[PR_ENTRYID]), $wastebasket, MESSAGE_MOVE);

						$messageprops = mapi_getprops($calmsg, array(PR_ENTRYID));
						$entryid = $messageprops[PR_ENTRYID];
					} else {
						// Create a new appointment with duplicate properties and recipient, but as an IPM.Appointment
						$new = mapi_folder_createmessage($calFolder);
						$props = mapi_getprops($this->message);

						$props[PR_MESSAGE_CLASS] = "IPM.Appointment";
						// when we are automatically processing the meeting request set responsestatus to olResponseNotResponded
						$props[$this->proptags['responsestatus']] = $userAction ? ($tentative ? olResponseTentative : olResponseAccepted) : olResponseNotResponded;

						if (isset($props[$this->proptags['intendedbusystatus']])) {
							if($tentative && $props[$this->proptags['intendedbusystatus']] !== fbFree) {
								$props[$this->proptags['busystatus']] = $tentative;
							} else {
								$props[$this->proptags['busystatus']] = $props[$this->proptags['intendedbusystatus']];
							}
							// we already have intendedbusystatus value in $props so no need to copy it
						} else {
							$props[$this->proptags['busystatus']] = $tentative ? fbTentative : fbBusy;
						}

						if($userAction) {
							// if user has responded then set replytime
							$props[$this->proptags['replytime']] = time();
						}

						mapi_setprops($new, $proposeNewTimeProps + $props);

						$reciptable = mapi_message_getrecipienttable($this->message);

						$recips = array();
						if(!$isDelegate)
							$recips = mapi_table_queryallrows($reciptable, $this->recipprops);
						
						$this->addOrganizer($props, $recips);

						if($isDelegate) {
							/**
							 * If user is delegate then remove that user from recipienttable of the MR.
							 * and delegate MR mail doesn't contain any of the attendees in recipient table.
							 * So, other required and optional attendees are added from 
							 * toattendeesstring and ccattendeesstring properties.
							 */
							$this->setRecipsFromString($recips, $messageprops[$this->proptags['toattendeesstring']], MAPI_TO);
							$this->setRecipsFromString($recips, $messageprops[$this->proptags['ccattendeesstring']], MAPI_CC);
							mapi_message_modifyrecipients($new, 0, $recips);
						} else {
							mapi_message_modifyrecipients($new, MODRECIP_ADD, $recips);
						}
						mapi_message_savechanges($new);

						$props = mapi_getprops($new, array(PR_ENTRYID));
						$entryid = $props[PR_ENTRYID];
					}
				}
			}
		} else {
			// Here only properties are set on calendaritem, because user is responding from calendar.
			$props = array();
			$props[$this->proptags['responsestatus']] = $tentative ? olResponseTentative : olResponseAccepted;

			if (isset($messageprops[$this->proptags['intendedbusystatus']])) {
				if($tentative && $messageprops[$this->proptags['intendedbusystatus']] !== fbFree) {
					$props[$this->proptags['busystatus']] = $tentative;
				} else {
					$props[$this->proptags['busystatus']] = $messageprops[$this->proptags['intendedbusystatus']];
				}
				$props[$this->proptags['intendedbusystatus']] = $messageprops[$this->proptags['intendedbusystatus']];
			} else {
				$props[$this->proptags['busystatus']] = $tentative ? fbTentative : fbBusy;
			}

			$props[$this->proptags['meetingstatus']] = olMeetingReceived;
			$props[$this->proptags['replytime']] = time();

			if ($basedate) {
				$recurr = new Recurrence($store, $this->message);

				// Copy recipients list
				$reciptable = mapi_message_getrecipienttable($this->message);
				$recips = mapi_table_queryallrows($reciptable, $this->recipprops);

				if($recurr->isException($basedate)) {
					$recurr->modifyException($proposeNewTimeProps + $props, $basedate, $recips);
				} else {
					$props[$this->proptags['startdate']] = $recurr->getOccurrenceStart($basedate);
					$props[$this->proptags['duedate']] = $recurr->getOccurrenceEnd($basedate);

					$props[PR_SENT_REPRESENTING_EMAIL_ADDRESS] = $messageprops[PR_SENT_REPRESENTING_EMAIL_ADDRESS];
					$props[PR_SENT_REPRESENTING_NAME] = $messageprops[PR_SENT_REPRESENTING_NAME];
					$props[PR_SENT_REPRESENTING_ADDRTYPE] = $messageprops[PR_SENT_REPRESENTING_ADDRTYPE];
					$props[PR_SENT_REPRESENTING_ENTRYID] = $messageprops[PR_SENT_REPRESENTING_ENTRYID];
					$props[PR_SENT_REPRESENTING_SEARCH_KEY] = $messageprops[PR_SENT_REPRESENTING_SEARCH_KEY];

					$recurr->createException($proposeNewTimeProps + $props, $basedate, false, $recips);
				}
			} else {
				mapi_setprops($this->message, $proposeNewTimeProps + $props);
			}
			mapi_savechanges($this->message);

			$entryid = $messageprops[PR_ENTRYID];
		}

		return $entryid;
	}
	
	/**
	 * Declines the meeting request by moving the item to the deleted
	 * items folder and sending a decline message. After declining, you
	 * can't use this class instance any more. The message is closed.
	 * When an occurrence is decline then false is returned because that
	 * occurrence is deleted not the recurring item.
	 *
	 *@param boolean $sendresponse true if a response has to be sent to organizer
	 *@param resource $store MAPI_store of user
	 *@param string $basedate if specified contains starttime of day of an occurrence 
	 *@return boolean true if item is deleted from Calendar else false
	 */
	function doDecline($sendresponse, $store=false, $basedate = false, $body = false)
	{
		$result = true;
		$calendaritem = false;
		if($this->isLocalOrganiser())
			return;

		// Remove any previous calendar items with this goid and appt id
		$messageprops = mapi_getprops($this->message, Array($this->proptags['goid'], $this->proptags['goid2'], PR_RCVD_REPRESENTING_NAME));

		// If this meeting request is received by a delegate then open delegator's store.
		if (isset($messageprops[PR_RCVD_REPRESENTING_NAME])) {
			$delegatorStore = $this->getDelegatorStore($messageprops);

			$store = $delegatorStore['store'];
			$calFolder = $delegatorStore['calFolder'];
		} else {
			$calFolder = $this->openDefaultCalendar();
			$store = $this->store;
		}

		$goid = $messageprops[$this->proptags['goid']];

		// First, find the items in the calendar by GlobalObjid (0x3)
		$entryids = $this->findCalendarItems($goid, $calFolder);

		if (!$basedate)
			$basedate = $this->getBasedateFromGlobalID($goid);

		if($sendresponse)
			$this->createResponse(olResponseDeclined, false, false, $body, $store, $basedate, $calFolder);

		if ($basedate) {
			// use CleanGlobalObjid (0x23)
			$calendaritems = $this->findCalendarItems($messageprops[$this->proptags['goid2']], $calFolder);

			foreach($calendaritems as $entryid) {
				// Open each calendar item and set the properties of the cancellation object
				$calendaritem = mapi_msgstore_openentry($store, $entryid);

				// Recurring item is found, now delete exception
				if ($calendaritem)
					$this->doRemoveExceptionFromCalendar($basedate, $calendaritem, $store);
			}

			if ($this->isMeetingRequest())
				$calendaritem = false;
			else
				$result = false;
		}

		if (!$calendaritem) {
			$calendar = $this->openDefaultCalendar();

			if(!empty($entryids)) {
				mapi_folder_deletemessages($calendar, $entryids);
			}

			// All we have to do to decline, is to move the item to the waste basket
			$wastebasket = $this->openDefaultWastebasket();
			$sourcefolder = $this->openParentFolder();

			$messageprops = mapi_getprops($this->message, Array(PR_ENTRYID));

			// Release the message
			$this->message = null;

			// Move the message to the waste basket
			mapi_folder_copymessages($sourcefolder, Array($messageprops[PR_ENTRYID]), $wastebasket, MESSAGE_MOVE);
		}
		return $result;
	}

	/**
	 * Removes a meeting request from the calendar when the user presses the
	 * 'remove from calendar' button in response to a meeting cancellation.
	 * @param string $basedate if specified contains starttime of day of an occurrence 
	 */
	function doRemoveFromCalendar($basedate) 
	{
		if($this->isLocalOrganiser())
			return false;

		$store = $this->store;
		$messageprops = mapi_getprops($this->message, Array(PR_ENTRYID, $this->proptags['goid'], PR_RCVD_REPRESENTING_NAME, PR_MESSAGE_CLASS));
		$goid = $messageprops[$this->proptags['goid']];

		if (isset($messageprops[PR_RCVD_REPRESENTING_NAME])) {
			$delegatorStore = $this->getDelegatorStore($messageprops);
			$store = $delegatorStore['store'];
			$calFolder = $delegatorStore['calFolder'];
		} else {
			$calFolder = $this->openDefaultCalendar();
		}

		$wastebasket = $this->openDefaultWastebasket();
		$sourcefolder = $this->openParentFolder();

		// Check if the message is a meeting request in the inbox or a calendaritem by checking the message class
		if (strpos($messageprops[PR_MESSAGE_CLASS], 'IPM.Schedule.Meeting') === 0) {
			/**
			 * 'Remove from calendar' option from previewpane then we have to check GlobalID of this meeting request.
			 * If basedate found then open meeting from calendar and delete that occurence.
			 */
			$basedate = false;
			if ($goid) {
				// Retrieve GlobalID and find basedate in it.
				$basedate = $this->getBasedateFromGlobalID($goid);

				// Basedate found, Now find item.
				if ($basedate) {
					$guid = $this->setBasedateInGlobalID($goid);

					// First, find the items in the calendar by GOID
					$calendaritems = $this->findCalendarItems($guid, $calFolder);
					if(is_array($calendaritems)) {
						foreach($calendaritems as $entryid) {
							// Open each calendar item and set the properties of the cancellation object
							$calendaritem = mapi_msgstore_openentry($store, $entryid);

							if ($calendaritem){
								$this->doRemoveExceptionFromCalendar($basedate, $calendaritem, $store);
							}
						}
					}
				}
			}

			// It is normal/recurring meeting item.
			if (!$basedate) {
				if (!isset($calFolder)) $calFolder = $this->openDefaultCalendar();
				
				$entryids = $this->findCalendarItems($goid, $calFolder);
				
				if(is_array($entryids)){
					// Move the calendaritem to the waste basket
					mapi_folder_copymessages($sourcefolder, $entryids, $wastebasket, MESSAGE_MOVE);
				}
			}

			// Release the message
			$this->message = null;
			
			// Move the message to the waste basket
			mapi_folder_copymessages($sourcefolder, Array($messageprops[PR_ENTRYID]), $wastebasket, MESSAGE_MOVE);

		} else {
			// Here only properties are set on calendaritem, because user is responding from calendar.
			if ($basedate) { //remove the occurence
				$this->doRemoveExceptionFromCalendar($basedate, $this->message, $store);
			} else { //remove normal/recurring meeting item.
				// Move the message to the waste basket
				mapi_folder_copymessages($sourcefolder, Array($messageprops[PR_ENTRYID]), $wastebasket, MESSAGE_MOVE);
			}
		}
	}
	
	/**
	 * Removes the meeting request by moving the item to the deleted
	 * items folder. After canceling, youcan't use this class instance 
	 * any more. The message is closed.
	 */
	function doCancel()
	{
		if($this->isLocalOrganiser())
			return;
		if(!$this->isMeetingCancellation())
			return;
			
		// Remove any previous calendar items with this goid and appt id
		$messageprops = mapi_getprops($this->message, Array($this->proptags['goid']));
		$goid = $messageprops[$this->proptags['goid']];

		$entryids = $this->findCalendarItems($goid);
		$calendar = $this->openDefaultCalendar();
		
		mapi_folder_deletemessages($calendar, $entryids);
		
		// All we have to do to decline, is to move the item to the waste basket
		
		$wastebasket = $this->openDefaultWastebasket();
		$sourcefolder = $this->openParentFolder();
		
		$messageprops = mapi_getprops($this->message, Array(PR_ENTRYID));
		
		// Release the message
		$this->message = null;
		
		// Move the message to the waste basket
		mapi_folder_copymessages($sourcefolder, Array($messageprops[PR_ENTRYID]), $wastebasket, MESSAGE_MOVE);
	}


	/**
	 * Sets the properties in the message so that is can be sent
	 * as a meeting request. The caller has to submit the message. This
	 * is only used for new MeetingRequests. Pass the appointment item as $message
	 * in the constructor to do this.
	 */
	function setMeetingRequest($basedate = false)
	{
		$props = mapi_getprops($this->message, Array($this->proptags['updatecounter']));

		// Create a new global id for this item
		$goid = pack("H*", "040000008200E00074C5B7101A82E00800000000");
		for ($i=0; $i<36; $i++)
			$goid .= chr(rand(0, 255));

		// Create a new appointment id for this item
		$apptid = rand();

		$props[PR_OWNER_APPT_ID] = $apptid;
		$props[PR_ICON_INDEX] = 1026; 
		$props[$this->proptags['goid']] = $goid;
		$props[$this->proptags['goid2']] = $goid;

		if (!isset($props[$this->proptags['updatecounter']])) {
			$props[$this->proptags['updatecounter']] = 0;			// OL also starts sequence no with zero.
			$props[$this->proptags['last_updatecounter']] = 0;
		}
		
		mapi_setprops($this->message, $props);
	}

	/**
	 * Sends a meeting request by copying it to the outbox, converting
	 * the message class, adding some properties that are required only
	 * for sending the message and submitting the message. Set cancel to 
	 * true if you wish to completely cancel the meeting request. You can
	 * specify an optional 'prefix' to prefix the sent message, which is normally
	 * 'Canceled: '
	 */
	function sendMeetingRequest($cancel, $prefix = false, $basedate = false, $deletedRecips = false)
	{
		$this->includesResources = false;
		$this->nonAcceptingResources = Array();

		// Get the properties of the message
		$messageprops = mapi_getprops($this->message, Array($this->proptags['recurring']));

		/*****************************************************************************************
		 * Submit message to non-resource recipients
		 */
		// Set BusyStatus to olTentative (1)
		// Set MeetingStatus to olMeetingReceived
		// Set ResponseStatus to olResponseNotResponded

		/**
		 * While sending recurrence meeting exceptions are not send as attachments
		 * because first all exceptions are send and then recurrence meeting is sent.
		 */
		if (isset($messageprops[$this->proptags['recurring']]) && $messageprops[$this->proptags['recurring']] && !$basedate) {
			// Book resource
			$resourceRecipData = $this->bookResources($this->message, $cancel, $prefix);

			if (!$this->errorSetResource) {
				$recurr = new Recurrence($this->openDefaultStore(), $this->message);

				// First send meetingrequest for recurring item
				$this->submitMeetingRequest($this->message, $cancel, $prefix, false, $recurr, false, $deletedRecips);

				// Then send all meeting request for all exceptions
				$exceptions = $recurr->getAllExceptions();
				if ($exceptions) {
					foreach($exceptions as $exceptionBasedate) {
						$attach = $recurr->getExceptionAttachment($exceptionBasedate);

						if ($attach) {
							$occurrenceItem = mapi_attach_openobj($attach, MAPI_MODIFY);
							$this->submitMeetingRequest($occurrenceItem, $cancel, false, $exceptionBasedate, $recurr, false, $deletedRecips);
							mapi_savechanges($attach);
						}
					}
				}
			}
		} else {
			// Basedate found, an exception is to be send
			if ($basedate) {
				$recurr = new Recurrence($this->openDefaultStore(), $this->message);

				if ($cancel) {
					//@TODO: remove occurrence from Resource's Calendar if resource was booked for whole series
					$this->submitMeetingRequest($this->message, $cancel, $prefix, $basedate, $recurr, false);
				} else {
					$attach = $recurr->getExceptionAttachment($basedate);

					if ($attach) {
						$occurrenceItem = mapi_attach_openobj($attach, MAPI_MODIFY);

						// Book resource for this occurrence
						$resourceRecipData = $this->bookResources($occurrenceItem, $cancel, $prefix, $basedate);

						if (!$this->errorSetResource) {
							// Save all previous changes
							mapi_savechanges($this->message);

							$this->submitMeetingRequest($occurrenceItem, $cancel, $prefix, $basedate, $recurr, true, $deletedRecips);
							mapi_savechanges($occurrenceItem);
							mapi_savechanges($attach);
						}
					}
				}
			} else {
				// This is normal meeting
				$resourceRecipData = $this->bookResources($this->message, $cancel, $prefix);

				if (!$this->errorSetResource) {
					$this->submitMeetingRequest($this->message, $cancel, $prefix, false, false, false, $deletedRecips);
				}
			}
		}

		if(isset($this->errorSetResource) && $this->errorSetResource){
			return Array(
				'error' => $this->errorSetResource,
				'displayname' => $this->recipientDisplayname
			);
		}else{
			return true;
		}
	}


	function getFreeBusyInfo($entryID,$start,$end)
	{
		$result = array();
		$fbsupport = mapi_freebusysupport_open($this->session);

		if(mapi_last_hresult() != NOERROR) {
			if(function_exists("dump")) {
				dump("Error in opening freebusysupport object.");
			}
			return $result;
		}

		$fbDataArray = mapi_freebusysupport_loaddata($fbsupport, array($entryID));

		if($fbDataArray[0] != NULL){
			foreach($fbDataArray as $fbDataUser){
				$rangeuser1 = mapi_freebusydata_getpublishrange($fbDataUser);
				if($rangeuser1 == NULL){
					return $result;
				}

				$enumblock = mapi_freebusydata_enumblocks($fbDataUser, $start, $end);
				mapi_freebusyenumblock_reset($enumblock);

				while(true){
					$blocks = mapi_freebusyenumblock_next($enumblock, 100);
					if(!$blocks){
						break;
					}
					foreach($blocks as $blockItem){
						$result[] = $blockItem;
					}
				}
			}
		}

		mapi_freebusysupport_close($fbsupport);
		return $result;
	}

	/**
	 * Updates the message after an update has been performed (for example,
	 * changing the time of the meeting). This must be called before re-sending
	 * the meeting request. You can also call this function instead of 'setMeetingRequest()'
	 * as it will automatically call setMeetingRequest on this object if it is the first
	 * call to this function.
	 */
	function updateMeetingRequest($basedate = false)
	{
		$messageprops = mapi_getprops($this->message, Array($this->proptags['last_updatecounter'], $this->proptags['goid']));

		if(!isset($messageprops[$this->proptags['last_updatecounter']]) || !isset($messageprops[$this->proptags['goid']])) {
			$this->setMeetingRequest($basedate);
		} else {
			$counter = $messageprops[$this->proptags['last_updatecounter']] + 1;

			// increment value of last_updatecounter, last_updatecounter will be common for recurring series
			// so even if you sending an exception only you need to update the last_updatecounter in the recurring series message
			// this way we can make sure that everytime we will be using a uniwue number for every operation
			mapi_setprops($this->message, Array($this->proptags['last_updatecounter'] => $counter));
		}
	}
	
	/**
	 * Returns TRUE if we are the organiser of the meeting. 
	 */
	function isLocalOrganiser()
	{
		if($this->isMeetingRequest() || $this->isMeetingRequestResponse()) {
			$messageid = $this->getAppointmentEntryID();
			
			if(!isset($messageid))
				return false;
				
			$message = mapi_msgstore_openentry($this->store, $messageid);

			$messageprops = mapi_getprops($this->message, Array($this->proptags['goid']));
			$basedate = $this->getBasedateFromGlobalID($messageprops[$this->proptags['goid']]);
			if ($basedate) {
				$recurr = new Recurrence($this->store, $message);
				$attach = $recurr->getExceptionAttachment($basedate);
				if ($attach) {
					$occurItem = mapi_attach_openobj($attach);
					$occurItemProps = mapi_getprops($occurItem, Array($this->proptags['responsestatus']));
				}
			}

			$messageprops = mapi_getprops($message, Array($this->proptags['responsestatus']));
		}

		/**
		 * User can send recurring meeting or any occurrences from a recurring appointment so
		 * to be organizer 'responseStatus' property should be 'olResponseOrganized' on either
		 * of the recurring item or occurrence item.
		 */
		if ((isset($messageprops[$this->proptags['responsestatus']]) && $messageprops[$this->proptags['responsestatus']] == olResponseOrganized)
			|| (isset($occurItemProps[$this->proptags['responsestatus']]) && $occurItemProps[$this->proptags['responsestatus']] == olResponseOrganized))
			return true;
		else
			return false;
	}
	
	/**
	 * Returns the entryid of the appointment that this message points at. This is
	 * only used on messages that are not in the calendar.
	 */
	function getAppointmentEntryID()
	{
		$messageprops = mapi_getprops($this->message, Array($this->proptags['goid2']));
		
		$goid2 = $messageprops[$this->proptags['goid2']];
		
		$items = $this->findCalendarItems($goid2);
		
		if(empty($items))
			return;
		
		// There should be just one item. If there are more, we just take the first one
		return $items[0];
	}
	
	/***************************************************************************************************
	 * Support functions - INTERNAL ONLY
	 ***************************************************************************************************
	 */
	 
	/**
	 * Return the tracking status of a recipient based on the IPM class (passed)
	 */
	function getTrackStatus($class) {
		$status = olRecipientTrackStatusNone;
		switch($class)
		{
			case "IPM.Schedule.Meeting.Resp.Pos":
				$status = olRecipientTrackStatusAccepted;
				break;
				
			case "IPM.Schedule.Meeting.Resp.Tent":
				$status = olRecipientTrackStatusTentative;
				break;	
				
			case "IPM.Schedule.Meeting.Resp.Neg":
				$status = olRecipientTrackStatusDeclined;
				break;
		}
		return $status;
	}
	
	function openParentFolder() {
		$messageprops = mapi_getprops($this->message, Array(PR_PARENT_ENTRYID));
		
		$parentfolder = mapi_msgstore_openentry($this->store, $messageprops[PR_PARENT_ENTRYID]);
		return $parentfolder;
	}
	
	function openDefaultCalendar() {
		return $this->openDefaultFolder(PR_IPM_APPOINTMENT_ENTRYID);
	}	

	function openDefaultOutbox($store=false) {
		return $this->openBaseFolder(PR_IPM_OUTBOX_ENTRYID, $store);
	}	
	
	function openDefaultWastebasket() {
		return $this->openBaseFolder(PR_IPM_WASTEBASKET_ENTRYID);
	}
	
	function getDefaultWastebasketEntryID() {
		return $this->getBaseEntryID(PR_IPM_WASTEBASKET_ENTRYID);
	}
	
	function getDefaultSentmailEntryID($store=false) {
		return $this->getBaseEntryID(PR_IPM_SENTMAIL_ENTRYID, $store);
	}
	
	function getDefaultFolderEntryID($prop) {
		try {
			$inbox = mapi_msgstore_getreceivefolder($this->store);
		} catch (MAPIException $e) {
			// public store doesn't support this method
			if($e->getCode() == MAPI_E_NO_SUPPORT) {
				// don't propogate this error to parent handlers, if store doesn't support it
				$e->setHandled();
				return;
			}
		}

		$inboxprops = mapi_getprops($inbox, Array($prop));
		if(!isset($inboxprops[$prop]))
			return;
			
		return $inboxprops[$prop];
	}
			
	function openDefaultFolder($prop) {
		$entryid = $this->getDefaultFolderEntryID($prop);
		$folder = mapi_msgstore_openentry($this->store, $entryid);
		
		return $folder;
	}	

	function getBaseEntryID($prop, $store=false) {
		$storeprops = mapi_getprops( (($store)?$store:$this->store) , Array($prop));
		if(!isset($storeprops[$prop]))
			return;
			
		return $storeprops[$prop];
	}
			
	function openBaseFolder($prop, $store=false) {
		$entryid = $this->getBaseEntryID($prop, $store);
		$folder = mapi_msgstore_openentry( (($store)?$store:$this->store) , $entryid);
		
		return $folder;
	}	
	/**
	 * Function which sends response to organizer when attendee accepts, declines or proposes new time to a received meeting request.
	 *@param integer $status response status of attendee
	 *@param integer $proposalStartTime proposed starttime by attendee
	 *@param integer $proposalEndTime proposed endtime by attendee
	 *@param integer $basedate date of occurrence which attendee has responded
	 */
	function createResponse($status, $proposalStartTime=false, $proposalEndTime=false, $body=false, $store, $basedate = false, $calFolder) {
		$messageprops = mapi_getprops($this->message, Array(PR_SENT_REPRESENTING_ENTRYID, 
															PR_SENT_REPRESENTING_EMAIL_ADDRESS,
															PR_SENT_REPRESENTING_ADDRTYPE,
															PR_SENT_REPRESENTING_NAME,
															PR_SENT_REPRESENTING_SEARCH_KEY,
															$this->proptags['goid'],
															$this->proptags['goid2'],
															$this->proptags['location'],
															$this->proptags['startdate'],
															$this->proptags['duedate'],
															$this->proptags['recurring'],
															$this->proptags['recurring_pattern'],
															$this->proptags['recurrence_data'],
															$this->proptags['timezone_data'],
															$this->proptags['timezone'],
															$this->proptags['updatecounter'],
															PR_SUBJECT,
															PR_MESSAGE_CLASS,
															PR_OWNER_APPT_ID,
															$this->proptags['is_exception']
									));

		if ($basedate && $messageprops[PR_MESSAGE_CLASS] != "IPM.Schedule.Meeting.Request" ){
			// we are creating response from a recurring calendar item object
			// We found basedate,so opened occurrence and get properties.
			$recurr = new Recurrence($store, $this->message);
			$exception = $recurr->getExceptionAttachment($basedate);

			if ($exception) {
				// Exception found, Now retrieve properties
				$imessage = mapi_attach_openobj($exception, 0);
				$imsgprops = mapi_getprops($imessage);

				// If location is provided, copy it to the response
				if (isset($imsgprops[$this->proptags['location']])) {
					$messageprops[$this->proptags['location']] = $imsgprops[$this->proptags['location']];
				}

				// Update $messageprops with timings of occurrence
				$messageprops[$this->proptags['startdate']] = $imsgprops[$this->proptags['startdate']];
				$messageprops[$this->proptags['duedate']] = $imsgprops[$this->proptags['duedate']];

				// Meeting related properties
				$props[$this->proptags['meetingstatus']] = $imsgprops[$this->proptags['meetingstatus']];
				$props[$this->proptags['responsestatus']] = $imsgprops[$this->proptags['responsestatus']];
				$props[PR_SUBJECT] = $imsgprops[PR_SUBJECT];
			} else {
				// Exceptions is deleted.
				// Update $messageprops with timings of occurrence
				$messageprops[$this->proptags['startdate']] = $recurr->getOccurrenceStart($basedate);
				$messageprops[$this->proptags['duedate']] = $recurr->getOccurrenceEnd($basedate);

				$props[$this->proptags['meetingstatus']] = olNonMeeting;
				$props[$this->proptags['responsestatus']] = olResponseNone;
			}

			$props[$this->proptags['recurring']] = false;
			$props[$this->proptags['is_exception']] = true;
		} else {
			// we are creating a response from meeting request mail (it could be recurring or non-recurring)
			// Send all recurrence info in response, if this is a recurrence meeting.
			$isRecurring = isset($messageprops[$this->proptags['recurring']]) && $messageprops[$this->proptags['recurring']];
			$isException = isset($messageprops[$this->proptags['is_exception']]) && $messageprops[$this->proptags['is_exception']];
			if ($isRecurring || $isException) {
				if($isRecurring) {
					$props[$this->proptags['recurring']] = $messageprops[$this->proptags['recurring']];
				}
				if($isException) {
					$props[$this->proptags['is_exception']] = $messageprops[$this->proptags['is_exception']];
				}
				$calendaritems = $this->findCalendarItems($messageprops[$this->proptags['goid2']], $calFolder);

				$calendaritem = mapi_msgstore_openentry($this->store, $calendaritems[0]);
				$recurr = new Recurrence($store, $calendaritem);
			}
		}

		// we are sending a response for recurring meeting request (or exception), so set some required properties
		if(isset($recurr) && $recurr) {
			if(!empty($messageprops[$this->proptags['recurring_pattern']])) {
				$props[$this->proptags['recurring_pattern']] = $messageprops[$this->proptags['recurring_pattern']];
			}

			if(!empty($messageprops[$this->proptags['recurrence_data']])) {
				$props[$this->proptags['recurrence_data']] = $messageprops[$this->proptags['recurrence_data']];
			}

			$props[$this->proptags['timezone_data']] = $messageprops[$this->proptags['timezone_data']];
			$props[$this->proptags['timezone']] = $messageprops[$this->proptags['timezone']];

			$this->generateRecurDates($recurr, $messageprops, $props);
		}

		// Create a response message
		$recip = Array();
		$recip[PR_ENTRYID] = $messageprops[PR_SENT_REPRESENTING_ENTRYID];
		$recip[PR_EMAIL_ADDRESS] = $messageprops[PR_SENT_REPRESENTING_EMAIL_ADDRESS];
		$recip[PR_ADDRTYPE] = $messageprops[PR_SENT_REPRESENTING_ADDRTYPE];
		$recip[PR_DISPLAY_NAME] = $messageprops[PR_SENT_REPRESENTING_NAME];
		$recip[PR_RECIPIENT_TYPE] = MAPI_TO;
		$recip[PR_SEARCH_KEY] = $messageprops[PR_SENT_REPRESENTING_SEARCH_KEY];

		switch($status) {
			case olResponseAccepted:
				$classpostfix = "Pos";
				$subjectprefix = dgettext("zarafa","Accepted");
				break;
			case olResponseDeclined:
				$classpostfix = "Neg";
				$subjectprefix = dgettext("zarafa","Declined");
				break;
			case olResponseTentative:
				$classpostfix = "Tent";
				$subjectprefix = dgettext("zarafa","Tentatively accepted");
				break;
		}

		if($proposalStartTime && $proposalEndTime){
			// if attendee has proposed new time then change subject prefix
			$subjectprefix = dgettext("zarafa","New Time Proposed");
		}

		$props[PR_SUBJECT] = $subjectprefix . ": " . $messageprops[PR_SUBJECT];

		$props[PR_MESSAGE_CLASS] = "IPM.Schedule.Meeting.Resp." . $classpostfix;
		if(isset($messageprops[PR_OWNER_APPT_ID]))
			$props[PR_OWNER_APPT_ID] = $messageprops[PR_OWNER_APPT_ID];

		// Set GLOBALID AND CLEANGLOBALID, if exception then also set basedate into GLOBALID(0x3).
		$props[$this->proptags['goid']] = $this->setBasedateInGlobalID($messageprops[$this->proptags['goid2']], $basedate);
		$props[$this->proptags['goid2']] = $messageprops[$this->proptags['goid2']];
		$props[$this->proptags['updatecounter']] = $messageprops[$this->proptags['updatecounter']];

		// get the default store, in which we have to store the accepted email by delegate or normal user.
		$defaultStore = $this->openDefaultStore();
		$props[PR_SENTMAIL_ENTRYID] = $this->getDefaultSentmailEntryID($defaultStore);

		if($proposalStartTime && $proposalEndTime){
			$props[$this->proptags['proposed_start_whole']] = $proposalStartTime;
			$props[$this->proptags['proposed_end_whole']] = $proposalEndTime;
			$props[$this->proptags['proposed_duration']] = round($proposalEndTime - $proposalStartTime)/60;
			$props[$this->proptags['counter_proposal']] = true;
		}

		//Set body message in Appointment
		if(isset($body)) {
			$props[PR_BODY] = $this->getMeetingTimeInfo() ? $this->getMeetingTimeInfo() : $body;
		}

		// PR_START_DATE/PR_END_DATE is used in the UI in Outlook on the response message
		$props[PR_START_DATE] = $messageprops[$this->proptags['startdate']];
		$props[PR_END_DATE] = $messageprops[$this->proptags['duedate']];

		// Set startdate and duedate in response mail.
		$props[$this->proptags['startdate']] = $messageprops[$this->proptags['startdate']];
		$props[$this->proptags['duedate']] = $messageprops[$this->proptags['duedate']];

		// responselocation is used in the UI in Outlook on the response message
		if (isset($messageprops[$this->proptags['location']])) {
			$props[$this->proptags['responselocation']] = $messageprops[$this->proptags['location']];
			$props[$this->proptags['location']] = $messageprops[$this->proptags['location']];
		}
		
		// check if $store is set and it is not equal to $defaultStore (means its the delegation case)
		if(isset($store) && isset($defaultStore)) {
			$storeProps = mapi_getprops($store, array(PR_ENTRYID));
			$defaultStoreProps = mapi_getprops($defaultStore, array(PR_ENTRYID));

			// @FIXME use entryid comparison functions here
			if($storeProps[PR_ENTRYID] !== $defaultStoreProps[PR_ENTRYID]){
				// get the properties of the other user (for which the logged in user is a delegate).
				$storeProps = mapi_getprops($store, array(PR_MAILBOX_OWNER_ENTRYID));
				$addrbook = mapi_openaddressbook($this->session);
				$addrbookitem = mapi_ab_openentry($addrbook, $storeProps[PR_MAILBOX_OWNER_ENTRYID]); 
				$addrbookitemprops = mapi_getprops($addrbookitem, array(PR_DISPLAY_NAME, PR_EMAIL_ADDRESS, PR_SEARCH_KEY));

				// setting the following properties will ensure that the delegation part of message.
				$props[PR_SENT_REPRESENTING_ENTRYID] = $storeProps[PR_MAILBOX_OWNER_ENTRYID];
				$props[PR_SENT_REPRESENTING_NAME] = $addrbookitemprops[PR_DISPLAY_NAME];
				$props[PR_SENT_REPRESENTING_EMAIL_ADDRESS] = $addrbookitemprops[PR_EMAIL_ADDRESS];
				$props[PR_SENT_REPRESENTING_ADDRTYPE] = "ZARAFA";
				$props[PR_SENT_REPRESENTING_SEARCH_KEY] = $addrbookitemprops[PR_SEARCH_KEY];

				// set the following properties will ensure the sender's details, which will be the default user in this case.
				//the function returns array($name, $emailaddr, $addrtype, $entryid, $searchkey);
				$defaultUserDetails = $this->getOwnerAddress($defaultStore);
				$props[PR_SENDER_ENTRYID] = $defaultUserDetails[3];
				$props[PR_SENDER_EMAIL_ADDRESS] = $defaultUserDetails[1];
				$props[PR_SENDER_NAME] = $defaultUserDetails[0];
				$props[PR_SENDER_ADDRTYPE] = $defaultUserDetails[2];
				$props[PR_SENDER_SEARCH_KEY] = $defaultUserDetails[4];
			}
		}

		// pass the default store to get the required store.
		$outbox = $this->openDefaultOutbox($defaultStore);
				
		$message = mapi_folder_createmessage($outbox);
		mapi_setprops($message, $props);
		mapi_message_modifyrecipients($message, MODRECIP_ADD, Array($recip));
		mapi_message_savechanges($message);
		mapi_message_submitmessage($message);
	}

	/**
	 * Function which finds items in calendar based on specified parameters.
	 *@param binary $goid GlobalID(0x3) of item
	 *@param resource $calendar MAPI_folder of user
	 *@param boolean $use_cleanGlobalID if true then search should be performed on cleanGlobalID(0x23) else globalID(0x3)
	 */
	function findCalendarItems($goid, $calendar = false, $use_cleanGlobalID = false) {
		if(!$calendar) {
			// Open the Calendar
			$calendar = $this->openDefaultCalendar();
		}
		
		// Find the item by restricting all items to the correct ID
		$restrict = Array(RES_AND, Array());
		
		array_push($restrict[1], Array(RES_PROPERTY,
													Array(RELOP => RELOP_EQ,
														  ULPROPTAG => ($use_cleanGlobalID ? $this->proptags['goid2'] : $this->proptags['goid']),
														  VALUE => $goid
													)
									));

		$calendarcontents = mapi_folder_getcontentstable($calendar);
		
		$rows = mapi_table_queryallrows($calendarcontents, Array(PR_ENTRYID), $restrict);
				
		if(empty($rows))
			return;
		
		$calendaritems = Array();

		// In principle, there should only be one row, but we'll handle them all just in case	
		foreach($rows as $row) {
			$calendaritems[] = $row[PR_ENTRYID];
		}

		return $calendaritems;
	}

	// Returns TRUE if both entryid's are equal. Equality is defined by both entryid's pointing at the
	// same SMTP address when converted to SMTP
	function compareABEntryIDs($entryid1, $entryid2) {
		// If the session was not passed, just do a 'normal' compare.
		if(!$this->session) {
			return $entryid1 == $entryid2;
		}

		$smtp1 = $this->getSMTPAddress($entryid1);
		$smtp2 = $this->getSMTPAddress($entryid2);

		if($smtp1 == $smtp2) {
			return true;
		} else {
			return false;
		}
	}

	// Gets the SMTP address of the passed addressbook entryid	
	function getSMTPAddress($entryid) {
		if(!$this->session) {
			return false;
		}

		$ab = mapi_openaddressbook($this->session);

		$abitem = mapi_ab_openentry($ab, $entryid);

		if(!$abitem) {
			return "";
		}

		$props = mapi_getprops($abitem, array(PR_ADDRTYPE, PR_EMAIL_ADDRESS, PR_SMTP_ADDRESS));

		if($props[PR_ADDRTYPE] == "SMTP") {
			return $props[PR_EMAIL_ADDRESS];
		} else {
			return $props[PR_SMTP_ADDRESS];
		}
	}

	/**
	 * Gets the properties associated with the owner of the passed store:
	 * PR_DISPLAY_NAME, PR_EMAIL_ADDRESS, PR_ADDRTYPE, PR_ENTRYID, PR_SEARCH_KEY
	 * 
	 * @param $store message store
	 * @param $fallbackToLoggedInUser if true then return properties of logged in user instead of mailbox owner
	 * not used when passed store is public store. for public store we are always returning logged in user's info.
	 * @return properties of logged in user in an array in sequence of display_name, email address, address tyep,
	 * entryid and search key.
	 */
	function getOwnerAddress($store, $fallbackToLoggedInUser = true)
	{
		if(!$this->session)
			return false;

		$storeProps = mapi_getprops($store, array(PR_MAILBOX_OWNER_ENTRYID, PR_USER_ENTRYID));

		$ownerEntryId = false;
		if(isset($storeProps[PR_USER_ENTRYID]) && $storeProps[PR_USER_ENTRYID]) {
			$ownerEntryId = $storeProps[PR_USER_ENTRYID];
		}

		if(isset($storeProps[PR_MAILBOX_OWNER_ENTRYID]) && $storeProps[PR_MAILBOX_OWNER_ENTRYID] && !$fallbackToLoggedInUser) {
			$ownerEntryId = $storeProps[PR_MAILBOX_OWNER_ENTRYID];
		}

		if($ownerEntryId) {
			$ab = mapi_openaddressbook($this->session);

			$zarafaUser = mapi_ab_openentry($ab, $ownerEntryId);
			if(!$zarafaUser)
				return false;

			$ownerProps = mapi_getprops($zarafaUser, array(PR_ADDRTYPE, PR_DISPLAY_NAME, PR_EMAIL_ADDRESS, PR_SEARCH_KEY));

			$addrType = $ownerProps[PR_ADDRTYPE];
			$name = $ownerProps[PR_DISPLAY_NAME];
			$emailAddr = $ownerProps[PR_EMAIL_ADDRESS];
			$searchKey = $ownerProps[PR_SEARCH_KEY];
			$entryId = $ownerEntryId;

			return array($name, $emailAddr, $addrType, $entryId, $searchKey);
		}

		return false;
	}
	
	// Opens this session's default message store
	function openDefaultStore()
	{
		$storestable = mapi_getmsgstorestable($this->session);
		$rows = mapi_table_queryallrows($storestable, array(PR_ENTRYID, PR_DEFAULT_STORE));
		$entry = false;
		
		foreach($rows as $row) {
			if(isset($row[PR_DEFAULT_STORE]) && $row[PR_DEFAULT_STORE]) {
				$entryid = $row[PR_ENTRYID];
				break;
			}
		}
		
		if(!$entryid)
			return false;
			
		return mapi_openmsgstore($this->session, $entryid);
	}
	/**
	 *  Function which adds organizer to recipient list which is passed.
	 *  This function also checks if it has organizer.
	 *
	 * @param array $messageProps message properties
	 * @param array $recipients	recipients list of message.
	 * @param boolean $isException true if we are processing recipient of exception
	 */
	function addOrganizer($messageProps, &$recipients, $isException = false){

		$hasOrganizer = false;
		// Check if meeting already has an organizer.
		foreach ($recipients as $key => $recipient){
			if (isset($recipient[PR_RECIPIENT_FLAGS]) && $recipient[PR_RECIPIENT_FLAGS] == (recipSendable | recipOrganizer)) {
				$hasOrganizer = true;
			} else if ($isException && !isset($recipient[PR_RECIPIENT_FLAGS])){
				// Recipients for an occurrence
				$recipients[$key][PR_RECIPIENT_FLAGS] = recipSendable | recipExceptionalResponse;
			}
		}

		if (!$hasOrganizer){
			// Create organizer.
			$organizer = array();
			$organizer[PR_ENTRYID] = $messageProps[PR_SENT_REPRESENTING_ENTRYID];
			$organizer[PR_DISPLAY_NAME] = $messageProps[PR_SENT_REPRESENTING_NAME];
			$organizer[PR_EMAIL_ADDRESS] = $messageProps[PR_SENT_REPRESENTING_EMAIL_ADDRESS];
			$organizer[PR_RECIPIENT_TYPE] = MAPI_TO;
			$organizer[PR_RECIPIENT_DISPLAY_NAME] = $messageProps[PR_SENT_REPRESENTING_NAME];
			$organizer[PR_ADDRTYPE] = empty($messageProps[PR_SENT_REPRESENTING_ADDRTYPE]) ? 'SMTP' : $messageProps[PR_SENT_REPRESENTING_ADDRTYPE];
			$organizer[PR_RECIPIENT_TRACKSTATUS] = olRecipientTrackStatusNone;
			$organizer[PR_RECIPIENT_FLAGS] = recipSendable | recipOrganizer;
			$organizer[PR_SEARCH_KEY] = $messageProps[PR_SENT_REPRESENTING_SEARCH_KEY];

			// Add organizer to recipients list.
			array_unshift($recipients, $organizer);
		}
	}

	/**
	 * Function adds recipients in recips array from the string.
	 * 
	 * @param array $recips recipient array.
	 * @param string $recipString recipient string attendees.
	 * @param int $type type of the recipient, MAPI_TO/MAPI_CC.
	 */
	function setRecipsFromString(&$recips, $recipString, $recipType = MAPI_TO)
	{
		$extraRecipient = array();
		$recipArray = explode(";", $recipString);

		foreach($recipArray as $recip) {
			$recip = trim($recip);
			if (!empty($recip)) {
				$extraRecipient[PR_RECIPIENT_TYPE] = $recipType;
				$extraRecipient[PR_DISPLAY_NAME] = $recip;
				array_push($recips, $extraRecipient);
			}
		}
		
	}

	/**
	 * Function which removes an exception/occurrence from recurrencing meeting
	 * when a meeting cancellation of an occurrence is processed.
	 *@param string $basedate basedate of an occurrence
	 *@param resource $message recurring item from which occurrence has to be deleted
	 *@param resource $store MAPI_MSG_Store which contains the item
	 */
	function doRemoveExceptionFromCalendar($basedate, $message, $store)
	{
		$recurr = new Recurrence($store, $message);
		$recurr->createException(array(), $basedate, true);
		mapi_savechanges($message);
	}

	/**
	 * Function which returns basedate of an changed occurrance from globalID of meeting request.
	 *@param binary $goid globalID
	 *@return boolean true if basedate is found else false it not found
	 */
	function getBasedateFromGlobalID($goid)
	{
		$hexguid = bin2hex($goid);
		$hexbase = substr($hexguid, 32, 8);
		$day = hexdec(substr($hexbase, 6, 2));
		$month = hexdec(substr($hexbase, 4, 2));
		$year = hexdec(substr($hexbase, 0, 4));

		if ($day && $month && $year)
			return gmmktime(0, 0, 0, $month, $day, $year);
		else
			return false;
	}

	/**
	 * Function which sets basedate in globalID of changed occurrance which is to be send.
	 *@param binary $goid globalID
	 *@param string basedate of changed occurrance
	 *@return binary globalID with basedate in it
	 */
	function setBasedateInGlobalID($goid, $basedate = false)
	{
		$hexguid = bin2hex($goid);
		$year = $basedate ? sprintf('%04s', dechex(date('Y', $basedate))) : '0000';
		$month = $basedate ? sprintf('%02s', dechex(date('m', $basedate))) : '00';
		$day = $basedate ? sprintf('%02s', dechex(date('d', $basedate))) : '00';

		return hex2bin(strtoupper(substr($hexguid, 0, 32) . $year . $month . $day . substr($hexguid, 40)));
	}
	/**
	 * Function which replaces attachments with copy_from in copy_to.
	 *@param resource $copy_from MAPI_message from which attachments are to be copied.
	 *@param resource $copy_to MAPI_message to which attachment are to be copied.
	 *@param boolean $copyExceptions if true then all exceptions should also be sent as attachments
	 */
	function replaceAttachments($copy_from, $copy_to, $copyExceptions = true)
	{
		/* remove all old attachments */
		$attachmentTable = mapi_message_getattachmenttable($copy_to);
		if($attachmentTable) {
			$attachments = mapi_table_queryallrows($attachmentTable, array(PR_ATTACH_NUM, PR_ATTACH_METHOD, PR_EXCEPTION_STARTTIME));

			foreach($attachments as $attach_props){
				/* remove exceptions too? */
				if (!$copyExceptions && $attach_props[PR_ATTACH_METHOD] == 5 && isset($attach_props[PR_EXCEPTION_STARTTIME]))
					continue;
				mapi_message_deleteattach($copy_to, $attach_props[PR_ATTACH_NUM]);
			}
		}
		$attachmentTable = false;

		/* copy new attachments */
		$attachmentTable = mapi_message_getattachmenttable($copy_from);
		if($attachmentTable) {
			$attachments = mapi_table_queryallrows($attachmentTable, array(PR_ATTACH_NUM, PR_ATTACH_METHOD, PR_EXCEPTION_STARTTIME));

			foreach($attachments as $attach_props){
				if (!$copyExceptions && $attach_props[PR_ATTACH_METHOD] == 5 && isset($attach_props[PR_EXCEPTION_STARTTIME]))
					continue;

				$attach_old = mapi_message_openattach($copy_from, (int) $attach_props[PR_ATTACH_NUM]);
				$attach_newResourceMsg = mapi_message_createattach($copy_to);
				mapi_copyto($attach_old, array(), array(), $attach_newResourceMsg, 0);
				mapi_savechanges($attach_newResourceMsg);
			}
		}
	}
	/**
	 * Function which replaces recipients in copy_to with recipients from copy_from.
	 *@param resource $copy_from MAPI_message from which recipients are to be copied.
	 *@param resource $copy_to MAPI_message to which recipients are to be copied.
	 */
	function replaceRecipients($copy_from, $copy_to, $isDelegate = false)
	{
		$recipienttable = mapi_message_getrecipienttable($copy_from);

		// If delegate, then do not add the delegate in recipients
		if ($isDelegate) {
			$delegate = mapi_getprops($copy_from, array(PR_RECEIVED_BY_EMAIL_ADDRESS));
			$res = array(RES_PROPERTY, array(RELOP => RELOP_NE, ULPROPTAG => PR_EMAIL_ADDRESS, VALUE => $delegate[PR_RECEIVED_BY_EMAIL_ADDRESS]));
			$recipients = mapi_table_queryallrows($recipienttable, $this->recipprops, $res);
		} else {
			$recipients = mapi_table_queryallrows($recipienttable, $this->recipprops);
		}

		$copy_to_recipientTable = mapi_message_getrecipienttable($copy_to);
		$copy_to_recipientRows = mapi_table_queryallrows($copy_to_recipientTable, array(PR_ROWID));
		foreach($copy_to_recipientRows as $recipient) {
			mapi_message_modifyrecipients($copy_to, MODRECIP_REMOVE, array($recipient));
		}

		mapi_message_modifyrecipients($copy_to, MODRECIP_ADD, $recipients);
	}
	/**
	 * Function creates meeting item in resource's calendar.
	 *@param resource $message MAPI_message which is to create in resource's calendar
	 *@param boolean $cancel cancel meeting
	 *@param string $prefix prefix for subject of meeting
	 */
	function bookResources($message, $cancel, $prefix, $basedate = false)
	{
		if(!$this->enableDirectBooking)
			return array();
			
		// Get the properties of the message
		$messageprops = mapi_getprops($message);

		if ($basedate) {
			$recurrItemProps = mapi_getprops($this->message, array($this->proptags['goid'], $this->proptags['goid2'], $this->proptags['timezone_data'], $this->proptags['timezone'], PR_OWNER_APPT_ID));

			$messageprops[$this->proptags['goid']] = $this->setBasedateInGlobalID($recurrItemProps[$this->proptags['goid']], $basedate);
			$messageprops[$this->proptags['goid2']] = $recurrItemProps[$this->proptags['goid2']];

			// Delete properties which are not needed.
			$deleteProps = array($this->proptags['basedate'], PR_DISPLAY_NAME, PR_ATTACHMENT_FLAGS, PR_ATTACHMENT_HIDDEN, PR_ATTACHMENT_LINKID, PR_ATTACH_FLAGS, PR_ATTACH_METHOD);
			foreach ($deleteProps as $propID) {
				if (isset($messageprops[$propID])) {
					unset($messageprops[$propID]);
				}
			}

			if (isset($messageprops[$this->proptags['recurring']])) $messageprops[$this->proptags['recurring']] = false;

			// Set Outlook properties
			$messageprops[$this->proptags['clipstart']] = $messageprops[$this->proptags['startdate']];
			$messageprops[$this->proptags['clipend']] = $messageprops[$this->proptags['duedate']];
			$messageprops[$this->proptags['timezone_data']] = $recurrItemProps[$this->proptags['timezone_data']];
			$messageprops[$this->proptags['timezone']] = $recurrItemProps[$this->proptags['timezone']];
			$messageprops[$this->proptags['attendee_critical_change']] = time();
			$messageprops[$this->proptags['owner_critical_change']] = time();
		}

		// Get resource recipients
		$getResourcesRestriction = Array(RES_AND,
			Array(Array(RES_PROPERTY,
				Array(RELOP => RELOP_EQ,	// Equals recipient type 3: Resource
					ULPROPTAG => PR_RECIPIENT_TYPE,
					VALUE => array(PR_RECIPIENT_TYPE =>MAPI_BCC) 
				)
			))
		);
		$recipienttable = mapi_message_getrecipienttable($message);
		$resourceRecipients = mapi_table_queryallrows($recipienttable, $this->recipprops, $getResourcesRestriction);

		$this->errorSetResource = false;
		$resourceRecipData = Array();

		// Put appointment into store resource users
		$i = 0;
		$len = count($resourceRecipients);
		while(!$this->errorSetResource && $i < $len){
			$request = array(array(PR_DISPLAY_NAME => $resourceRecipients[$i][PR_DISPLAY_NAME]));
			$ab = mapi_openaddressbook($this->session);
			$ret = mapi_ab_resolvename($ab, $request, EMS_AB_ADDRESS_LOOKUP);
			$result = mapi_last_hresult();
			if ($result == NOERROR){
				$result = $ret[0][PR_ENTRYID];
			}
			$resourceUsername = $ret[0][PR_EMAIL_ADDRESS];
			$resourceABEntryID = $ret[0][PR_ENTRYID];

			// Get StoreEntryID by username
			$user_entryid = mapi_msgstore_createentryid($this->store, $resourceUsername);

			// Open store of the user
			$userStore = mapi_openmsgstore($this->session, $user_entryid);
			// Open root folder
			$userRoot = mapi_msgstore_openentry($userStore, null);
			// Get calendar entryID
			$userRootProps = mapi_getprops($userRoot, array(PR_STORE_ENTRYID, PR_IPM_APPOINTMENT_ENTRYID, PR_FREEBUSY_ENTRYIDS));
			
			// Open Calendar folder   [check hresult==0]
			$accessToFolder = false;
			try {
				$calFolder = mapi_msgstore_openentry($userStore, $userRootProps[PR_IPM_APPOINTMENT_ENTRYID]);
				if($calFolder){
					$calFolderProps = mapi_getProps($calFolder, Array(PR_ACCESS));
					if(($calFolderProps[PR_ACCESS] & MAPI_ACCESS_CREATE_CONTENTS) !== 0){
						$accessToFolder = true;
					}
				}
			} catch (MAPIException $e) {
				$e->setHandled();
				$this->errorSetResource = 1; // No access
			}

			if($accessToFolder) {
				/**
				 * Get the LocalFreebusy message that contains the properties that 
				 * are set to accept or decline resource meeting requests
				 */
				// Use PR_FREEBUSY_ENTRYIDS[1] to open folder the LocalFreeBusy msg
				$localFreebusyMsg = mapi_msgstore_openentry($userStore, $userRootProps[PR_FREEBUSY_ENTRYIDS][1]);
				if($localFreebusyMsg){
					$props = mapi_getprops($localFreebusyMsg, array(PR_PROCESS_MEETING_REQUESTS, PR_DECLINE_RECURRING_MEETING_REQUESTS, PR_DECLINE_CONFLICTING_MEETING_REQUESTS));

					$acceptMeetingRequests = ($props[PR_PROCESS_MEETING_REQUESTS])?1:0;
					$declineRecurringMeetingRequests = ($props[PR_DECLINE_RECURRING_MEETING_REQUESTS])?1:0;
					$declineConflictingMeetingRequests = ($props[PR_DECLINE_CONFLICTING_MEETING_REQUESTS])?1:0;
					if(!$acceptMeetingRequests){
						/**
						 * When a resource has not been set to automatically accept meeting requests, 
						 * the meeting request has to be sent to him rather than being put directly into
						 * his calendar. No error should be returned.
						 */
						//$errorSetResource = 2;
						$this->nonAcceptingResources[] = $resourceRecipients[$i];
					}else{
						if($declineRecurringMeetingRequests && !$cancel){
							// Check if appointment is recurring
							if($messageprops[ $this->proptags['recurring'] ]){
								$this->errorSetResource = 3;
							}
						}
						if($declineConflictingMeetingRequests && !$cancel){
							// Check for conflicting items
							$conflicting = false;

							// Open the calendar
							$calFolder = mapi_msgstore_openentry($userStore, $userRootProps[PR_IPM_APPOINTMENT_ENTRYID]);

							if($calFolder) {
								if ($this->isMeetingConflicting($message, $userStore, $calFolder, $messageprops))
									$conflicting = true;
							} else {
								$this->errorSetResource = 1; // No access
							}

							if($conflicting){
								$this->errorSetResource = 4; // Conflict
							}
						}
					}
				}
			}

			if(!$this->errorSetResource && $accessToFolder){
				/**
				 * First search on GlobalID(0x3)
				 * If (recurring and occurrence) If Resource was booked for only this occurrence then Resource should have only this occurrence in Calendar and not whole series.
				 * If (normal meeting) then GlobalID(0x3) and CleanGlobalID(0x23) are same, so doesnt matter if search is based on GlobalID.
				 */
				$rows = $this->findCalendarItems($messageprops[$this->proptags['goid']], $calFolder);

				/**
				 * If no entry is found then 
				 * 1) Resource doesnt have meeting in Calendar. Seriously!!
				 * OR
				 * 2) We were looking for occurrence item but Resource has whole series
				 */
				if(empty($rows)){
					/**
					 * Now search on CleanGlobalID(0x23) WHY???
					 * Because we are looking recurring item
					 *
					 * Possible results of this search
					 * 1) If Resource was booked for more than one occurrences then this search will return all those occurrence because search is perform on CleanGlobalID
					 * 2) If Resource was booked for whole series then it should return series.
					 */
					$rows = $this->findCalendarItems($messageprops[$this->proptags['goid2']], $calFolder, true);

					$newResourceMsg = false;
					if (!empty($rows)) {
						// Since we are looking for recurring item, open every result and check for 'recurring' property.
						foreach($rows as $row) {
							$ResourceMsg = mapi_msgstore_openentry($userStore, $row);
							$ResourceMsgProps = mapi_getprops($ResourceMsg, array($this->proptags['recurring']));

							if (isset($ResourceMsgProps[$this->proptags['recurring']]) && $ResourceMsgProps[$this->proptags['recurring']]) {
								$newResourceMsg = $ResourceMsg;
								break;
							}
						}
					}

					// Still no results found. I giveup, create new message.
					if (!$newResourceMsg)
						$newResourceMsg = mapi_folder_createmessage($calFolder);
				}else{
					$newResourceMsg = mapi_msgstore_openentry($userStore, $rows[0]);
				}

				// Prefix the subject if needed
				if($prefix && isset($messageprops[PR_SUBJECT])) {
					$messageprops[PR_SUBJECT] = $prefix . $messageprops[PR_SUBJECT];
				}
				
				// Set status to cancelled if needed
				$messageprops[$this->proptags['busystatus']] = fbBusy; // The default status (Busy)
				if($cancel) {
					$messageprops[$this->proptags['meetingstatus']] = olMeetingCanceled; // The meeting has been canceled
					$messageprops[$this->proptags['busystatus']] = fbFree; // Free
				} else {
					$messageprops[$this->proptags['meetingstatus']] = olMeetingReceived; // The recipient is receiving the request
				}
				$messageprops[$this->proptags['responsestatus']] = olResponseAccepted; // The resource autmatically accepts the appointment

				$messageprops[PR_MESSAGE_CLASS] = "IPM.Appointment";
				
				// Remove the PR_ICON_INDEX as it is not needed in the sent message and it also
				// confuses the Zarafa webaccess
				$messageprops[PR_ICON_INDEX] = null;
				$messageprops[PR_RESPONSE_REQUESTED] = true;

				$addrinfo = $this->getOwnerAddress($this->store);

				if($addrinfo) {
					list($ownername, $owneremailaddr, $owneraddrtype, $ownerentryid, $ownersearchkey) = $addrinfo;
					
					$messageprops[PR_SENT_REPRESENTING_EMAIL_ADDRESS] = $owneremailaddr;
					$messageprops[PR_SENT_REPRESENTING_NAME] = $ownername;
					$messageprops[PR_SENT_REPRESENTING_ADDRTYPE] = $owneraddrtype;
					$messageprops[PR_SENT_REPRESENTING_ENTRYID] = $ownerentryid;
					$messageprops[PR_SENT_REPRESENTING_SEARCH_KEY] = $ownersearchkey;

					$messageprops[$this->proptags['apptreplyname']] = $ownername;
					$messageprops[$this->proptags['replytime']] = time();
				}

				if ($basedate && isset($ResourceMsgProps[$this->proptags['recurring']]) && $ResourceMsgProps[$this->proptags['recurring']]) {
					$recurr = new Recurrence($userStore, $newResourceMsg);

					// Copy recipients list
					$reciptable = mapi_message_getrecipienttable($message);
					$recips = mapi_table_queryallrows($reciptable, $this->recipprops);
					// add owner to recipient table
					$this->addOrganizer($messageprops, $recips, true);

					// Update occurrence
					if($recurr->isException($basedate))
						$recurr->modifyException($messageprops, $basedate, $recips);
					else
						$recurr->createException($messageprops, $basedate, false, $recips);
				} else {

					mapi_setprops($newResourceMsg, $messageprops);

					// Copy attachments
					$this->replaceAttachments($message, $newResourceMsg);

					// Copy all recipients too
					$this->replaceRecipients($message, $newResourceMsg);

					// Now add organizer also to recipient table
					$recips = Array();
					$this->addOrganizer($messageprops, $recips);
					mapi_message_modifyrecipients($newResourceMsg, MODRECIP_ADD, $recips);
				}

				mapi_savechanges($newResourceMsg);

				$resourceRecipData[] = Array(
					'store' => $userStore,
					'folder' => $calFolder,
					'msg' => $newResourceMsg,
				);
				$this->includesResources = true;
			}else{
				/**
				 * If no other errors occured and you have no access to the 
				 * folder of the resource, throw an error=1.
				 */
				if(!$this->errorSetResource){
					$this->errorSetResource = 1;
				}

				for($j = 0, $len = count($resourceRecipData); $j < $len; $j++){
					// Get the EntryID
					$props = mapi_message_getprops($resourceRecipData[$j]['msg']);

					mapi_folder_deletemessages($resourceRecipData[$j]['folder'], Array($props[PR_ENTRYID]), DELETE_HARD_DELETE);
				}
				$this->recipientDisplayname = $resourceRecipients[$i][PR_DISPLAY_NAME];
			}
			$i++;
		}

		/**************************************************************
		 * Set the BCC-recipients (resources) tackstatus to accepted.
		 */
		// Get resource recipients
		$getResourcesRestriction = Array(RES_AND,
			Array(Array(RES_PROPERTY,
				Array(RELOP => RELOP_EQ,	// Equals recipient type 3: Resource
					ULPROPTAG => PR_RECIPIENT_TYPE,
					VALUE => array(PR_RECIPIENT_TYPE =>MAPI_BCC) 
				)
			))
		);
		$recipienttable = mapi_message_getrecipienttable($message);
		$resourceRecipients = mapi_table_queryallrows($recipienttable, $this->recipprops, $getResourcesRestriction);
		if(!empty($resourceRecipients)){
			// Set Tracking status of resource recipients to olResponseAccepted (3)
			for($i = 0, $len = count($resourceRecipients); $i < $len; $i++){
				$resourceRecipients[$i][PR_RECIPIENT_TRACKSTATUS] = olRecipientTrackStatusAccepted;
				$resourceRecipients[$i][PR_RECIPIENT_TRACKSTATUS_TIME] = time();
			}
			mapi_message_modifyrecipients($message, MODRECIP_MODIFY, $resourceRecipients);
		}

		// Publish updated free/busy information
		if(!$this->errorSetResource){
			for($i = 0, $len = count($resourceRecipData); $i < $len; $i++){
				$storeProps = mapi_msgstore_getprops($resourceRecipData[$i]['store'], array(PR_MAILBOX_OWNER_ENTRYID));
				if (isset($storeProps[PR_MAILBOX_OWNER_ENTRYID])){
					$pub = new FreeBusyPublish($this->session, $resourceRecipData[$i]['store'], $resourceRecipData[$i]['folder'], $storeProps[PR_MAILBOX_OWNER_ENTRYID]);
					$pub->publishFB(time() - (7 * 24 * 60 * 60), 6 * 30 * 24 * 60 * 60); // publish from one week ago, 6 months ahead
				}
			}
		}

		return $resourceRecipData;
	}
	/**
	 * Function which save an exception into recurring item
	 * 
	 * @param resource $recurringItem reference to MAPI_message of recurring item
	 * @param resource $occurrenceItem reference to MAPI_message of occurrence
	 * @param string $basedate basedate of occurrence
	 * @param boolean $move if true then occurrence item is deleted
	 * @param boolean $tentative true if user has tentatively accepted it or false if user has accepted it.
	 * @param boolean $userAction true if user has manually responded to meeting request
	 * @param resource $store user store
	 * @param boolean $isDelegate true if delegate is processing this meeting request
	 */
	function acceptException(&$recurringItem, &$occurrenceItem, $basedate, $move = false, $tentative, $userAction = false, $store, $isDelegate = false)
	{
		$recurr = new Recurrence($store, $recurringItem);

		// Copy properties from meeting request
		$exception_props = mapi_getprops($occurrenceItem);

		// Copy recipients list
		$reciptable = mapi_message_getrecipienttable($occurrenceItem);
		// If delegate, then do not add the delegate in recipients
		if ($isDelegate) {
			$delegate = mapi_getprops($this->message, array(PR_RECEIVED_BY_EMAIL_ADDRESS));
			$res = array(RES_PROPERTY, array(RELOP => RELOP_NE, ULPROPTAG => PR_EMAIL_ADDRESS, VALUE => $delegate[PR_RECEIVED_BY_EMAIL_ADDRESS]));
			$recips = mapi_table_queryallrows($reciptable, $this->recipprops, $res);
		} else {
			$recips = mapi_table_queryallrows($reciptable, $this->recipprops);
		}


		// add owner to recipient table
		$this->addOrganizer($exception_props, $recips, true);

		// add delegator to meetings
		if ($isDelegate) $this->addDelegator($exception_props, $recips);

		$exception_props[$this->proptags['meetingstatus']] = olMeetingReceived;
		$exception_props[$this->proptags['responsestatus']] = $userAction ? ($tentative ? olResponseTentative : olResponseAccepted) : olResponseNotResponded;
		// Set basedate property (ExceptionReplaceTime)

		if (isset($exception_props[$this->proptags['intendedbusystatus']])) {
			if($tentative && $exception_props[$this->proptags['intendedbusystatus']] !== fbFree) {
				$exception_props[$this->proptags['busystatus']] = $tentative;
			} else {
				$exception_props[$this->proptags['busystatus']] = $exception_props[$this->proptags['intendedbusystatus']];
			}
			// we already have intendedbusystatus value in $exception_props so no need to copy it
		} else {
			$exception_props[$this->proptags['busystatus']] = $tentative ? fbTentative : fbBusy;
		}

		if($userAction) {
			// if user has responded then set replytime
			$exception_props[$this->proptags['replytime']] = time();
		}

		if($recurr->isException($basedate))
			$recurr->modifyException($exception_props, $basedate, $recips, $occurrenceItem);
		else
			$recurr->createException($exception_props, $basedate, false, $recips, $occurrenceItem);

		// Move the occurrenceItem to the waste basket
		if ($move) {
			$wastebasket = $this->openDefaultWastebasket();
			$sourcefolder = mapi_msgstore_openentry($this->store, $exception_props[PR_PARENT_ENTRYID]);
			mapi_folder_copymessages($sourcefolder, Array($exception_props[PR_ENTRYID]), $wastebasket, MESSAGE_MOVE);
		}

		mapi_savechanges($recurringItem);
	}

	/**
	 * Function which submits meeting request based on arguments passed to it.
	 *@param resource $message MAPI_message whose meeting request is to be send
	 *@param boolean $cancel if true send request, else send cancellation
	 *@param string $prefix subject prefix
	 *@param integer $basedate basedate for an occurrence
	 *@param Object $recurObject recurrence object of mr
	 *@param boolean $copyExceptions When sending update mail for recurring item then we dont send exceptions in attachments
	 */
	function submitMeetingRequest($message, $cancel, $prefix, $basedate = false, $recurObject = false, $copyExceptions = true, $deletedRecips = false)
	{
		$newmessageprops = $messageprops = mapi_getprops($this->message);
		$new = $this->createOutgoingMessage();
		
		// Copy the entire message into the new meeting request message
		if ($basedate) {
			// messageprops contains properties of whole recurring series
			// and newmessageprops contains properties of exception item
			$newmessageprops = mapi_getprops($message);

			// Ensure that the correct basedate is set in the new message
			$newmessageprops[$this->proptags['basedate']] = $basedate;

			// Set isRecurring to false, because this is an exception
			$newmessageprops[$this->proptags['recurring']] = false;

			// set LID_IS_EXCEPTION to true
			$newmessageprops[$this->proptags['is_exception']] = true;

			// Set to high importance
			if($cancel) $newmessageprops[PR_IMPORTANCE] = IMPORTANCE_HIGH;

			// Set startdate and enddate of exception
			if ($cancel && $recurObject) {
				$newmessageprops[$this->proptags['startdate']] = $recurObject->getOccurrenceStart($basedate);
				$newmessageprops[$this->proptags['duedate']] = $recurObject->getOccurrenceEnd($basedate);
			}

			// Set basedate in guid (0x3)
			$newmessageprops[$this->proptags['goid']] = $this->setBasedateInGlobalID($messageprops[$this->proptags['goid2']], $basedate);
			$newmessageprops[$this->proptags['goid2']] = $messageprops[$this->proptags['goid2']];
			$newmessageprops[PR_OWNER_APPT_ID] = $messageprops[PR_OWNER_APPT_ID];

			// Get deleted recipiets from exception msg
			$restriction = Array(RES_AND,
							Array(
								Array(RES_BITMASK,
									Array(	ULTYPE		=>	BMR_NEZ,
											ULPROPTAG	=>	PR_RECIPIENT_FLAGS,
											ULMASK		=>	recipExceptionalDeleted
									)
								),
								Array(RES_BITMASK,
									Array(	ULTYPE		=>	BMR_EQZ,
											ULPROPTAG	=>	PR_RECIPIENT_FLAGS,
											ULMASK		=>	recipOrganizer
									)
								),
							)
			);

			// In direct-booking mode, we don't need to send cancellations to resources
			if($this->enableDirectBooking) {
				$restriction[1][] = Array(RES_PROPERTY,
										Array(RELOP => RELOP_NE,	// Does not equal recipient type: MAPI_BCC (Resource)
											ULPROPTAG => PR_RECIPIENT_TYPE,
											VALUE => array(PR_RECIPIENT_TYPE => MAPI_BCC)
										)
									);
			}
			
			$recipienttable = mapi_message_getrecipienttable($message);
			$recipients = mapi_table_queryallrows($recipienttable, $this->recipprops, $restriction);

			if (!$deletedRecips) {
				$deletedRecips = array_merge(array(), $recipients);
			} else {
				$deletedRecips = array_merge($deletedRecips, $recipients);
			}
		}

		// Remove the PR_ICON_INDEX as it is not needed in the sent message and it also
		// confuses the Zarafa webaccess
		$newmessageprops[PR_ICON_INDEX] = null;
		$newmessageprops[PR_RESPONSE_REQUESTED] = true;

		// PR_START_DATE and PR_END_DATE will be used by outlook to show the position in the calendar
		$newmessageprops[PR_START_DATE] = $newmessageprops[$this->proptags['startdate']];
		$newmessageprops[PR_END_DATE] = $newmessageprops[$this->proptags['duedate']];

		// Set updatecounter/AppointmentSequenceNumber
		// get the value of latest updatecounter for the whole series and use it
		$newmessageprops[$this->proptags['updatecounter']] = $messageprops[$this->proptags['last_updatecounter']];

		$meetingTimeInfo = $this->getMeetingTimeInfo();

		if($meetingTimeInfo)
			$newmessageprops[PR_BODY] = $meetingTimeInfo;

		// Send all recurrence info in mail, if this is a recurrence meeting.
		if (isset($messageprops[$this->proptags['recurring']]) && $messageprops[$this->proptags['recurring']]) {
			if(!empty($messageprops[$this->proptags['recurring_pattern']])) {
				$newmessageprops[$this->proptags['recurring_pattern']] = $messageprops[$this->proptags['recurring_pattern']];
			}
			$newmessageprops[$this->proptags['recurrence_data']] = $messageprops[$this->proptags['recurrence_data']];
			$newmessageprops[$this->proptags['timezone_data']] = $messageprops[$this->proptags['timezone_data']];
			$newmessageprops[$this->proptags['timezone']] = $messageprops[$this->proptags['timezone']];

			if($recurObject) {
				$this->generateRecurDates($recurObject, $messageprops, $newmessageprops);
			}
		}

		if (isset($newmessageprops[$this->proptags['counter_proposal']])) {
			unset($newmessageprops[$this->proptags['counter_proposal']]);
		}

		// Prefix the subject if needed
		if ($prefix && isset($newmessageprops[PR_SUBJECT]))
			$newmessageprops[PR_SUBJECT] = $prefix . $newmessageprops[PR_SUBJECT];

		mapi_setprops($new, $newmessageprops);

		// Copy attachments
		$this->replaceAttachments($message, $new, $copyExceptions);

		// Retrieve only those recipient who should receive this meeting request.
		$stripResourcesRestriction = Array(RES_AND,
								Array(
									Array(RES_BITMASK,
										Array(	ULTYPE		=>	BMR_EQZ,
												ULPROPTAG	=>	PR_RECIPIENT_FLAGS,
												ULMASK		=>	recipExceptionalDeleted
										)
									),
									Array(RES_BITMASK,
										Array(	ULTYPE		=>	BMR_EQZ,
												ULPROPTAG	=>	PR_RECIPIENT_FLAGS,
												ULMASK		=>	recipOrganizer
										)
									),
								)
		);
		
		// In direct-booking mode, resources do not receive a meeting request
		if($this->enableDirectBooking) {
			$stripResourcesRestriction[1][] = 
									Array(RES_PROPERTY,
										Array(RELOP => RELOP_NE,	// Does not equal recipient type: MAPI_BCC (Resource)
											ULPROPTAG => PR_RECIPIENT_TYPE,
											VALUE => array(PR_RECIPIENT_TYPE => MAPI_BCC)
										)
									);
		}
		
		$recipienttable = mapi_message_getrecipienttable($message);
		$recipients = mapi_table_queryallrows($recipienttable, $this->recipprops, $stripResourcesRestriction);

		if ($basedate && empty($recipients)) {
			// Retrieve full list
			$recipienttable = mapi_message_getrecipienttable($this->message);
			$recipients = mapi_table_queryallrows($recipienttable, $this->recipprops);

			// Save recipients in exceptions
			mapi_message_modifyrecipients($message, MODRECIP_ADD, $recipients);

			// Now retrieve only those recipient who should receive this meeting request.
			$recipients = mapi_table_queryallrows($recipienttable, $this->recipprops, $stripResourcesRestriction);
		}

		//@TODO: handle nonAcceptingResources
		/**
		 * Add resource recipients that did not automatically accept the meeting request.
		 * (note: meaning that they did not decline the meeting request)
		 *//*
		for($i=0;$i<count($this->nonAcceptingResources);$i++){
			$recipients[] = $this->nonAcceptingResources[$i];
		}*/

		if(!empty($recipients)) {
			// Strip out the sender/"owner" recipient
			mapi_message_modifyrecipients($new, MODRECIP_ADD, $recipients);

			// Set some properties that are different in the sent request than
			// in the item in our calendar

			// we should store busystatus value to intendedbusystatus property, because busystatus for outgoing meeting request
			// should always be fbTentative
			$newmessageprops[$this->proptags['intendedbusystatus']] = isset($newmessageprops[$this->proptags['busystatus']]) ? $newmessageprops[$this->proptags['busystatus']] : $messageprops[$this->proptags['busystatus']];
			$newmessageprops[$this->proptags['busystatus']] = fbTentative; // The default status when not accepted
			$newmessageprops[$this->proptags['responsestatus']] = olResponseNotResponded; // The recipient has not responded yet
			$newmessageprops[$this->proptags['attendee_critical_change']] = time();
			$newmessageprops[$this->proptags['owner_critical_change']] = time();
			$newmessageprops[$this->proptags['meetingtype']] = mtgRequest;

			if ($cancel) {
				$newmessageprops[PR_MESSAGE_CLASS] = "IPM.Schedule.Meeting.Canceled";
				$newmessageprops[$this->proptags['meetingstatus']] = olMeetingCanceled; // It's a cancel request
				$newmessageprops[$this->proptags['busystatus']] = fbFree; // set the busy status as free
			} else {
				$newmessageprops[PR_MESSAGE_CLASS] = "IPM.Schedule.Meeting.Request";
				$newmessageprops[$this->proptags['meetingstatus']] = olMeetingReceived; // The recipient is receiving the request
			}

			mapi_setprops($new, $newmessageprops);
			mapi_message_savechanges($new);

			// Submit message to non-resource recipients
			mapi_message_submitmessage($new);
		}

		// Send cancellation to deleted attendees
		if ($deletedRecips && !empty($deletedRecips)) {
			$new = $this->createOutgoingMessage();

			mapi_message_modifyrecipients($new, MODRECIP_ADD, $deletedRecips);

			$newmessageprops[PR_MESSAGE_CLASS] = "IPM.Schedule.Meeting.Canceled";
			$newmessageprops[$this->proptags['meetingstatus']] = olMeetingCanceled; // It's a cancel request
			$newmessageprops[$this->proptags['busystatus']] = fbFree; // set the busy status as free
			$newmessageprops[PR_IMPORTANCE] = IMPORTANCE_HIGH;	// HIGH Importance
			if (isset($newmessageprops[PR_SUBJECT])) {
				$newmessageprops[PR_SUBJECT] = dgettext("zarafa","Canceled").": " . $newmessageprops[PR_SUBJECT];
			}

			mapi_setprops($new, $newmessageprops);
			mapi_message_savechanges($new);

			// Submit message to non-resource recipients
			mapi_message_submitmessage($new);
		}

		// Set properties on meeting object in calendar
		// Set requestsent to 'true' (turns on 'tracking', etc)
		$props = array();
		$props[$this->proptags['meetingstatus']] = olMeeting;
		$props[$this->proptags['responsestatus']] = olResponseOrganized;
		$props[$this->proptags['requestsent']] = (!empty($recipients)) || ($this->includesResources && !$this->errorSetResource);
		$props[$this->proptags['attendee_critical_change']] = time();
		$props[$this->proptags['owner_critical_change']] = time();
		$props[$this->proptags['meetingtype']] = mtgRequest;
		// save the new updatecounter to exception/recurring series/normal meeting
		$props[$this->proptags['updatecounter']] = $newmessageprops[$this->proptags['updatecounter']];

		// PR_START_DATE and PR_END_DATE will be used by outlook to show the position in the calendar
		$props[PR_START_DATE] = $messageprops[$this->proptags['startdate']];
		$props[PR_END_DATE] = $messageprops[$this->proptags['duedate']];

		mapi_setprops($message, $props);

		// saving of these properties on calendar item should be handled by caller function
		// based on sending meeting request was successful or not.
	}

	/**
	 * OL2007 uses these 4 properties to specify occurence that should be updated.
	 * ical generates RECURRENCE-ID property based on exception's basedate (PidLidExceptionReplaceTime), 
	 * but OL07 doesn't send this property, so ical will generate RECURRENCE-ID property based on date
	 * from GlobalObjId and time from StartRecurTime property, so we are sending basedate property and
	 * also additionally we are sending these properties.
	 * Ref: MS-OXCICAL 2.2.1.20.20 Property: RECURRENCE-ID
	 * @param Object $recurObject instance of recurrence class for this message
	 * @param Array $messageprops properties of meeting object that is going to be send
	 * @param Array $newmessageprops properties of meeting request/response that is going to be send
	 */
	function generateRecurDates($recurObject, $messageprops, &$newmessageprops)
	{
		if($messageprops[$this->proptags['startdate']] && $messageprops[$this->proptags['duedate']]) {
			$startDate = date("Y:n:j:G:i:s", $recurObject->fromGMT($recurObject->tz, $messageprops[$this->proptags['startdate']]));
			$endDate = date("Y:n:j:G:i:s", $recurObject->fromGMT($recurObject->tz, $messageprops[$this->proptags['duedate']]));

			$startDate = explode(":", $startDate);
			$endDate = explode(":", $endDate);

			// [0] => year, [1] => month, [2] => day, [3] => hour, [4] => minutes, [5] => seconds
			// RecurStartDate = year * 512 + month_number * 32 + day_number
			$newmessageprops[$this->proptags["start_recur_date"]] = (((int) $startDate[0]) * 512) + (((int) $startDate[1]) * 32) + ((int) $startDate[2]);
			// RecurStartTime = hour * 4096 + minutes * 64 + seconds
			$newmessageprops[$this->proptags["start_recur_time"]] = (((int) $startDate[3]) * 4096) + (((int) $startDate[4]) * 64) + ((int) $startDate[5]);

			$newmessageprops[$this->proptags["end_recur_date"]] = (((int) $endDate[0]) * 512) + (((int) $endDate[1]) * 32) + ((int) $endDate[2]);
			$newmessageprops[$this->proptags["end_recur_time"]] = (((int) $endDate[3]) * 4096) + (((int) $endDate[4]) * 64) + ((int) $endDate[5]);
		}
	}

	function createOutgoingMessage()
	{
		$sentprops = array();
		$outbox = $this->openDefaultOutbox($this->openDefaultStore());

		$outgoing = mapi_folder_createmessage($outbox);
		if(!$outgoing) return false;

		$addrinfo = $this->getOwnerAddress($this->store);
		if($addrinfo) {
			list($ownername, $owneremailaddr, $owneraddrtype, $ownerentryid, $ownersearchkey) = $addrinfo;
			$sentprops[PR_SENT_REPRESENTING_EMAIL_ADDRESS] = $owneremailaddr;
			$sentprops[PR_SENT_REPRESENTING_NAME] = $ownername;
			$sentprops[PR_SENT_REPRESENTING_ADDRTYPE] = $owneraddrtype;
			$sentprops[PR_SENT_REPRESENTING_ENTRYID] = $ownerentryid;
			$sentprops[PR_SENT_REPRESENTING_SEARCH_KEY] = $ownersearchkey;
		}

		$sentprops[PR_SENTMAIL_ENTRYID] = $this->getDefaultSentmailEntryID($this->openDefaultStore());

		mapi_setprops($outgoing, $sentprops);

		return $outgoing;
	}

	/**
	 * Function which checks received meeting request is either old(outofdate) or new.
	 * @return boolean true if meeting request is outofdate else false if it is new
	 */
	function isMeetingOutOfDate()
	{
		$result = false;
		$store = $this->store;
		$props = mapi_getprops($this->message, array($this->proptags['goid'], $this->proptags['goid2'], $this->proptags['updatecounter'], $this->proptags['meetingtype'], $this->proptags['owner_critical_change']));

		if (isset($props[$this->proptags['meetingtype']]) && ($props[$this->proptags['meetingtype']] & mtgOutOfDate) == mtgOutOfDate) {
			return true;
		}

		// get the basedate to check for exception
		$basedate = $this->getBasedateFromGlobalID($props[$this->proptags['goid']]);

		$calendarItems = $this->getCorrespondedCalendarItems();

		foreach($calendarItems as $calendarItem) {
			if ($calendarItem) {
				$calendarItemProps = mapi_getprops($calendarItem, array(
														$this->proptags['owner_critical_change'],
														$this->proptags['updatecounter'],
														$this->proptags['recurring']
										));

				// If these items is recurring and basedate is found then open exception to compare it with meeting request
				if (isset($calendarItemProps[$this->proptags['recurring']]) && $calendarItemProps[$this->proptags['recurring']] && $basedate) {
					$recurr = new Recurrence($store, $calendarItem);

					if ($recurr->isException($basedate)) {
						$attach = $recurr->getExceptionAttachment($basedate);
						$exception = mapi_attach_openobj($attach, 0);
						$occurrenceItemProps = mapi_getprops($exception, array(
														$this->proptags['owner_critical_change'],
														$this->proptags['updatecounter']
											));
					}

					// we found the exception, compare with it
					if(isset($occurrenceItemProps)) {
						if ((isset($occurrenceItemProps[$this->proptags['updatecounter']]) && $props[$this->proptags['updatecounter']] < $occurrenceItemProps[$this->proptags['updatecounter']]) 
							|| (isset($occurrenceItemProps[$this->proptags['owner_critical_change']]) && $props[$this->proptags['owner_critical_change']] < $occurrenceItemProps[$this->proptags['owner_critical_change']])) {

							mapi_setprops($this->message, array($this->proptags['meetingtype'] => mtgOutOfDate, PR_ICON_INDEX => 1033));
							mapi_savechanges($this->message);
							$result = true;
						}
					} else {
						// we are not able to find exception, could mean that a significant change has occured on series
						// and it deleted all exceptions, so compare with series
						if ((isset($calendarItemProps[$this->proptags['updatecounter']]) && $props[$this->proptags['updatecounter']] < $calendarItemProps[$this->proptags['updatecounter']]) 
							|| (isset($calendarItemProps[$this->proptags['owner_critical_change']]) && $props[$this->proptags['owner_critical_change']] < $calendarItemProps[$this->proptags['owner_critical_change']])) {

							mapi_setprops($this->message, array($this->proptags['meetingtype'] => mtgOutOfDate, PR_ICON_INDEX => 1033));
							mapi_savechanges($this->message);
							$result = true;
						}
					}
				} else {
					// normal / recurring series
					if ((isset($calendarItemProps[$this->proptags['updatecounter']]) && $props[$this->proptags['updatecounter']] < $calendarItemProps[$this->proptags['updatecounter']]) 
							|| (isset($calendarItemProps[$this->proptags['owner_critical_change']]) && $props[$this->proptags['owner_critical_change']] < $calendarItemProps[$this->proptags['owner_critical_change']])) {

						mapi_setprops($this->message, array($this->proptags['meetingtype'] => mtgOutOfDate, PR_ICON_INDEX => 1033));
						mapi_savechanges($this->message);
						$result = true;
					}
				}
			}
		}

		return $result;
	}

	/**
	 * Function which checks received meeting request is updated later or not.
	 * @return boolean true if meeting request is updated later.
	 * @TODO: Implement handling for recurrings and exceptions.
	 */
	function isMeetingUpdated()
	{
		$result = false;
		$store = $this->store;
		$props = mapi_getprops($this->message, array($this->proptags['goid'], $this->proptags['goid2'], $this->proptags['updatecounter'], $this->proptags['owner_critical_change'], $this->proptags['updatecounter']));

		$calendarItems = $this->getCorrespondedCalendarItems();

		foreach($calendarItems as $calendarItem) {
			if ($calendarItem) {
				$calendarItemProps = mapi_getprops($calendarItem, array(
													$this->proptags['updatecounter'],
													$this->proptags['recurring']
									));

				if(isset($calendarItemProps[$this->proptags['updatecounter']]) && isset($props[$this->proptags['updatecounter']]) && $calendarItemProps[$this->proptags['updatecounter']] > $props[$this->proptags['updatecounter']]) {
					$result = true;
				}
			}
		}

		return $result;
	}

	/**
	 * Checks if there has been any significant changes on appointment/meeting item.
	 * Significant changes be:
	 * 1) startdate has been changed
	 * 2) duedate has been changed OR
	 * 3) recurrence pattern has been created, modified or removed
	 *
	 * @param Array oldProps old props before an update
	 * @param Number basedate basedate
	 * @param Boolean isRecurrenceChanged for change in recurrence pattern.
	 * isRecurrenceChanged true means Recurrence pattern has been changed, so clear all attendees response
	 */
	function checkSignificantChanges($oldProps, $basedate, $isRecurrenceChanged = false)
	{
		$message = null;
		$attach = null;

		// If basedate is specified then we need to open exception message to clear recipient responses
		if($basedate) {
			$recurrence = new Recurrence($this->store, $this->message);
			if($recurrence->isException($basedate)){
				$attach = $recurrence->getExceptionAttachment($basedate);
				if ($attach) {
					$message = mapi_attach_openobj($attach, MAPI_MODIFY);
				}
			}
		} else {
			// use normal message or recurring series message
			$message = $this->message;
		}

		if(!$message) {
			return;
		}

		$newProps = mapi_getprops($message, array($this->proptags['startdate'], $this->proptags['duedate'], $this->proptags['updatecounter']));

		// Check whether message is updated or not.
		if(isset($newProps[$this->proptags['updatecounter']]) && $newProps[$this->proptags['updatecounter']] == 0) {
			return;
		}

		if (($newProps[$this->proptags['startdate']] != $oldProps[$this->proptags['startdate']])
			|| ($newProps[$this->proptags['duedate']] != $oldProps[$this->proptags['duedate']])
			|| $isRecurrenceChanged) {
			$this->clearRecipientResponse($message);

			mapi_setprops($message, array($this->proptags['owner_critical_change'] => time()));

			mapi_savechanges($message);
			if ($attach) { // Also save attachment Object.
				mapi_savechanges($attach);
			}
		}
	}

	/**
	 * Clear responses of all attendees who have replied in past.
	 * @param MAPI_MESSAGE $message on which responses should be cleared
	 */
	function clearRecipientResponse($message)
	{
		$recipTable = mapi_message_getrecipienttable($message);
		$recipsRows = mapi_table_queryallrows($recipTable, $this->recipprops);

		foreach($recipsRows as $recipient) {
			if(($recipient[PR_RECIPIENT_FLAGS] & recipOrganizer) != recipOrganizer){
				// Recipient is attendee, set the trackstatus to "Not Responded"
				$recipient[PR_RECIPIENT_TRACKSTATUS] = olRecipientTrackStatusNone;
			} else {
				// Recipient is organizer, this is not possible, but for safety
				// it is best to clear the trackstatus for him as well by setting
				// the trackstatus to "Organized".
				$recipient[PR_RECIPIENT_TRACKSTATUS] = olRecipientTrackStatusNone;
			}
			mapi_message_modifyrecipients($message, MODRECIP_MODIFY, array($recipient));
		}
	}

	/**
	 * Function returns corresponded calendar items attached with
	 * the meeting request.
	 * @return Array array of correlated calendar items.
	 */
	function getCorrespondedCalendarItems()
	{
		$store = $this->store;
		$props = mapi_getprops($this->message, array($this->proptags['goid'], $this->proptags['goid2'], PR_RCVD_REPRESENTING_NAME));

		$basedate = $this->getBasedateFromGlobalID($props[$this->proptags['goid']]);

		// If Delegate is processing mr for Delegator then retrieve Delegator's store and calendar.
		if (isset($props[PR_RCVD_REPRESENTING_NAME])) {
			$delegatorStore = $this->getDelegatorStore($props);
			$store = $delegatorStore['store'];
			$calFolder = $delegatorStore['calFolder'];
		} else {
			$calFolder = $this->openDefaultCalendar();
		}

		// Finding item in calendar with GlobalID(0x3), not necessary that attendee is having recurring item, he/she can also have only a occurrence
		$entryids = $this->findCalendarItems($props[$this->proptags['goid']], $calFolder);

		// Basedate found, so this meeting request is an update of an occurrence.
		if ($basedate) {
			if (!$entryids) {
				// Find main recurring item in calendar with GlobalID(0x23)
				$entryids = $this->findCalendarItems($props[$this->proptags['goid2']], $calFolder);
			}
		}

		$calendarItems = array();
		if ($entryids) {
			foreach($entryids as $entryid) {
				$calendarItems[] = mapi_msgstore_openentry($store, $entryid);
			}
		}

		return $calendarItems;
	}

	/**
	 * Function which checks whether received meeting request is either conflicting with other appointments or not.
	 *@return mixed(boolean/integer) true if normal meeting is conflicting or an integer which specifies no of instances
	 * conflict of recurring meeting and false if meeting is not conflicting.
	 */
	function isMeetingConflicting($message = false, $userStore = false, $calFolder = false, $msgprops = false)
	{
		$returnValue = false;
		$conflicting = false;
		$noOfInstances = 0;

		if (!$message) $message = $this->message;

		if (!$userStore) $userStore = $this->store;

		if (!$calFolder) {
			$root = mapi_msgstore_openentry($userStore);
			$rootprops = mapi_getprops($root, array(PR_STORE_ENTRYID, PR_IPM_APPOINTMENT_ENTRYID, PR_FREEBUSY_ENTRYIDS));

			if(!isset($rootprops[PR_IPM_APPOINTMENT_ENTRYID])) {
				return;
			}

			$calFolder = mapi_msgstore_openentry($userStore, $rootprops[PR_IPM_APPOINTMENT_ENTRYID]);
		}

		if (!$msgprops) $msgprops = mapi_getprops($message, array($this->proptags['goid'], $this->proptags['goid2'], $this->proptags['startdate'], $this->proptags['duedate'], $this->proptags['recurring'], $this->proptags['clipstart'], $this->proptags['clipend']));

		if ($calFolder) {
			// Meeting request is recurring, so get all occurrence and check for each occurrence whether it conflicts with other appointments in Calendar.
			if (isset($msgprops[$this->proptags['recurring']]) && $msgprops[$this->proptags['recurring']]) {
				// Apply recurrence class and retrieve all occurrences(max: 30 occurrence because recurrence can also be set as 'no end date')
				$recurr = new Recurrence($userStore, $message);
				$items = $recurr->getItems($msgprops[$this->proptags['clipstart']], $msgprops[$this->proptags['clipend']] * (24*24*60), 30);

				foreach ($items as $item) {
					// Get all items in the timeframe that we want to book, and get the goid and busystatus for each item
					$calendarItems = $recurr->getCalendarItems($userStore, $calFolder, $item[$this->proptags['startdate']], $item[$this->proptags['duedate']], array($this->proptags['goid'], $this->proptags['busystatus'], PR_OWNER_APPT_ID));

					foreach ($calendarItems as $calendarItem) {
						if ($calendarItem[$this->proptags['busystatus']] != fbFree) {
							/**
							 * Only meeting requests have globalID, normal appointments do not have globalID
							 * so if any normal appointment if found then it is assumed to be conflict.
							 */
							if(isset($calendarItem[$this->proptags['goid']])) {
								if ($calendarItem[$this->proptags['goid']] !== $msgprops[$this->proptags['goid']]) {
									$noOfInstances++;
									break;
								}
							} else {
								$noOfInstances++;
								break;
							}
						}
					}
				}

				$returnValue = $noOfInstances;
			} else {
				// Get all items in the timeframe that we want to book, and get the goid and busystatus for each item
				$items = getCalendarItems($userStore, $calFolder, $msgprops[$this->proptags['startdate']], $msgprops[$this->proptags['duedate']], array($this->proptags['goid'], $this->proptags['busystatus'], PR_OWNER_APPT_ID));

				foreach($items as $item) {
					if ($item[$this->proptags['busystatus']] != fbFree) {
						if(isset($item[$this->proptags['goid']])) {
							if (($item[$this->proptags['goid']] !== $msgprops[$this->proptags['goid']])
								&& ($item[$this->proptags['goid']] !== $msgprops[$this->proptags['goid2']])) { 
								$conflicting = true;
								break;
							}
						} else {
							$conflicting = true;
							break;
						}
					}
				}

				if ($conflicting) $returnValue = true;
			}
		}
		return $returnValue;
	}

	/**
	 *  Function which adds organizer to recipient list which is passed.
	 *  This function also checks if it has organizer.
	 *
	 * @param array $messageProps message properties
	 * @param array $recipients	recipients list of message.
	 * @param boolean $isException true if we are processing recipient of exception
	 */
	function addDelegator($messageProps, &$recipients)
	{
		$hasDelegator = false;
		// Check if meeting already has an organizer.
		foreach ($recipients as $key => $recipient){
			if (isset($messageProps[PR_RCVD_REPRESENTING_EMAIL_ADDRESS]) && $recipient[PR_EMAIL_ADDRESS] == $messageProps[PR_RCVD_REPRESENTING_EMAIL_ADDRESS])
				$hasDelegator = true;
		}

		if (!$hasDelegator){
			// Create delegator.
			$delegator = array();
			$delegator[PR_ENTRYID] = $messageProps[PR_RCVD_REPRESENTING_ENTRYID];
			$delegator[PR_DISPLAY_NAME] = $messageProps[PR_RCVD_REPRESENTING_NAME];
			$delegator[PR_EMAIL_ADDRESS] = $messageProps[PR_RCVD_REPRESENTING_EMAIL_ADDRESS];
			$delegator[PR_RECIPIENT_TYPE] = MAPI_TO;
			$delegator[PR_RECIPIENT_DISPLAY_NAME] = $messageProps[PR_RCVD_REPRESENTING_NAME];
			$delegator[PR_ADDRTYPE] = empty($messageProps[PR_RCVD_REPRESENTING_ADDRTYPE]) ? 'SMTP':$messageProps[PR_RCVD_REPRESENTING_ADDRTYPE];
			$delegator[PR_RECIPIENT_TRACKSTATUS] = olRecipientTrackStatusNone;
			$delegator[PR_RECIPIENT_FLAGS] = recipSendable;
			$delegator[PR_SEARCH_KEY] = $messageProps[PR_RCVD_REPRESENTING_SEARCH_KEY];

			// Add organizer to recipients list.
			array_unshift($recipients, $delegator);
		}
	}

	function getDelegatorStore($messageprops)
	{
		// Find the organiser of appointment in addressbook
		$delegatorName = array(array(PR_DISPLAY_NAME => $messageprops[PR_RCVD_REPRESENTING_NAME]));
		$ab = mapi_openaddressbook($this->session);
		$user = mapi_ab_resolvename($ab, $delegatorName, EMS_AB_ADDRESS_LOOKUP);

		// Get StoreEntryID by username
		$delegatorEntryid = mapi_msgstore_createentryid($this->store, $user[0][PR_EMAIL_ADDRESS]);
		// Open store of the delegator
		$delegatorStore = mapi_openmsgstore($this->session, $delegatorEntryid);
		// Open root folder
		$delegatorRoot = mapi_msgstore_openentry($delegatorStore, null);
		// Get calendar entryID
		$delegatorRootProps = mapi_getprops($delegatorRoot, array(PR_IPM_APPOINTMENT_ENTRYID));
		// Open the calendar Folder
		$calFolder = mapi_msgstore_openentry($delegatorStore, $delegatorRootProps[PR_IPM_APPOINTMENT_ENTRYID]);

		return Array('store' => $delegatorStore, 'calFolder' => $calFolder);
	}

	/**
	 * Function returns extra info about meeting timing along with message body 
	 * which will be included in body while sending meeting request/response.
	 * 
	 * @return string $meetingTimeInfo info about meeting timing along with message body
	 */
	function getMeetingTimeInfo()
	{
		return $this->meetingTimeInfo;
	}

	/**
	 * Function sets extra info about meeting timing along with message body 
	 * which will be included in body while sending meeting request/response.
	 *
	 * @param string $meetingTimeInfo info about meeting timing along with message body
	 */
	function setMeetingTimeInfo($meetingTimeInfo)
	{
		$this->meetingTimeInfo = $meetingTimeInfo;
	}
}
?>
