egroupware/calendar/inc/class.bocalendar.inc.php

<?php
  /**************************************************************************\
  * eGroupWare - Calendar                                                    *
  * http://www.eGroupWare.org                                                *
  * Maintained and further developed by RalfBecker@outdoor-training.de       *
  * Based on Webcalendar by Craig Knudsen <cknudsen@radix.net>               *
  *          http://www.radix.net/~cknudsen                                  *
  * Originaly modified by Mark Peters <skeeter@phpgroupware.org>             *
  * --------------------------------------------                             *
  *  This program is free software; you can redistribute it and/or modify it *
  *  under the terms of the GNU General Public License as published by the   *
  *  Free Software Foundation; either version 2 of the License, or (at your  *
  *  option) any later version.                                              *
  \**************************************************************************/

	/* $Id$ */

	/**
	* Depricated BO class of the calendar app.
	*
	* Note: All new code should only access the bocal class and NOT this class !!!
	*
	* If you need a function not already available in bocal, please ask RalfBecker@outdoor-training.de
	*/

	class bocalendar
	{
		var $public_functions = Array(
			'read_entry'      => True,
			'delete_entry'    => True,
			'delete_calendar' => True,
			'change_owner'    => True,
			'update'          => True,
			'check_set_default_prefs' => True,
			'store_to_cache'  => True,
			'export_event'    => True,
			'send_alarm'      => True,
			'reinstate'       => True
		);

		var $soap_functions = Array(
			'read_entry' => Array(
				'in' => Array(
					'int'
				),
				'out' => Array(
					'SOAPStruct'
				)
			),
			'delete_entry' => Array(
				'in' => Array(
					'int'
				),
				'out' => Array(
					'int'
				)
			),
			'delete_calendar' => Array(
				'in' => Array(
					'int'
				),
				'out' => Array(
					'int'
				)
			),
			'change_owner' => Array(
				'in' => Array(
					'array'
				),
				'out' => Array(
					'int'
				)
			),
			'update' => Array(
				'in' => Array(
					'array',
					'array',
					'array',
					'array',
					'array'
				),
				'out' => Array(
					'array'
				)
			),
			'store_to_cache'	=> Array(
				'in' => Array(
					'struct'
				),
				'out' => Array(
					'SOAPStruct'
				)
			),
			'store_to_cache'	=> Array(
				'in' => Array(
					'array'
				),
				'out' => Array(
					'string'
				)
			),
			'categories' => array(
				'in'  => array('bool'),
				'out' => array('array')
			),
		);

		var $debug = False;
//		var $debug = True;

		var $so;
		var $cached_events;
		var $repeating_events;
		var $day;
		var $month;
		var $year;
		var $prefs;

		var $owner;
		var $grants;
		var $holiday_color;
		var $printer_friendly = False;

		var $cached_holidays;

		var $g_owner = 0;

		var $filter;
		var $cat_id;
		var $users_timeformat;

		var $modified;
		var $deleted;
		var $added;

		var $is_group = False;

		var $soap = False;

		var $use_session = False;

		var $today;
		var $debug_string;

		var $sortby;
		var $num_months;
		var $xmlrpc = False;	// not called via xmlrpc

		function bocalendar($session=0)
		{
			$this->cat = CreateObject('phpgwapi.categories');
			$this->grants = $GLOBALS['phpgw']->acl->get_grants('calendar');
			@reset($this->grants);
			if(DEBUG_APP)
			{
				if(floor(phpversion()) >= 4)
				{
					$this->debug_string = '';
					ob_start();
				}

				foreach($this->grants as $grantor => $rights)
				{
					print_debug('Grantor',$grantor);
					print_debug('Rights',$rights);
				}
			}

			print_debug('Read use_session',$session);

			if($session)
			{
				$this->read_sessiondata();
				$this->use_session = True;
			}
			print_debug('BO Filter',$this->filter);
			print_debug('Owner',$this->owner);

			$this->prefs['calendar']    = $GLOBALS['phpgw_info']['user']['preferences']['calendar'];
			$this->check_set_default_prefs();

			$owner = get_var('owner',array('GET','POST'),$GLOBALS['owner']);

			ereg('menuaction=([a-zA-Z.]+)',$_SERVER['HTTP_REFERER'],$regs);
			$from = $regs[1];
			if ((substr($_SERVER['PHP_SELF'],-8) == 'home.php' && substr($this->prefs['calendar']['defaultcalendar'],0,7) == 'planner'
				|| $_GET['menuaction'] == 'calendar.uicalendar.planner' &&
				$from  != 'calendar.uicalendar.planner' && !$this->save_owner)
				&& (int)$this->prefs['calendar']['planner_start_with_group'] > 0)
			{
				// entering planner for the first time ==> saving owner in save_owner, setting owner to default
				//
				$this->save_owner = $this->owner;
				$owner = 'g_'.$this->prefs['calendar']['planner_start_with_group'];
			}
			elseif ($_GET['menuaction'] != 'calendar.uicalendar.planner' &&
				$this->save_owner)
			{
				// leaving planner with an unchanged user/owner ==> setting owner back to save_owner
				//
				$owner = (int)(isset($_GET['owner']) ? $_GET['owner'] : $this->save_owner);
				unset($this->save_owner);
			}
			elseif (!empty($owner) && $owner != $this->owner && $from == 'calendar.uicalendar.planner')
			{
				// user/owner changed within planner ==> forgetting save_owner
				//
				unset($this->save_owner);
			}

			if(isset($owner) && substr($owner,0,2) == 'g_')
			{
				$this->set_owner_to_group((int) substr($owner,2));
			}
			elseif(isset($owner) && $owner)
			{
				$this->owner = (int) $owner;
			}
			if(!@isset($this->owner) || !@$this->owner)
			{
				$this->owner = (int) $GLOBALS['phpgw_info']['user']['account_id'];
			}
			elseif(isset($this->owner) && $GLOBALS['phpgw']->accounts->get_type($this->owner) == 'g')
			{
				$this->set_owner_to_group((int)$this->owner);
			}

			$this->prefs['common']    = $GLOBALS['phpgw_info']['user']['preferences']['common'];

			if ($this->prefs['common']['timeformat'] == '12')
			{
				$this->users_timeformat = 'h:ia';
			}
			else
			{
				$this->users_timeformat = 'H:i';
			}
			$this->holiday_color = (substr($GLOBALS['phpgw_info']['theme']['bg07'],0,1)=='#'?'':'#').$GLOBALS['phpgw_info']['theme']['bg07'];

			$friendly = (int) get_var('friendly',array('GET','POST'),0);

			$this->printer_friendly = ((int)$friendly == 1?True:False);

			if(isset($_POST['filter']) && ($_POST['filter'] == ' all ' || $_POST['filter'] == ' privat '))
			{ 
				$this->filter = $_POST['filter']; 
			}
			else
			{
				$this->filter = ' '.$this->prefs['calendar']['defaultfilter'].' ';
			}
			if(isset($_REQUEST['sortby']) && ($_REQUEST['sortby'] == 'user' || $_REQUEST['sortby'] == 'category')) 
			{ 
				$this->sortby = $_REQUEST['sortby']; 
			}
			else
			{
				$this->sortby = $this->prefs['calendar']['defaultcalendar'] == 'planner_user' ? 'user' : 'category';
			}
			if(isset($_POST['cat_id'])) { $this->cat_id = (int) $_POST['cat_id']; }

			if($GLOBALS['phpgw']->accounts->get_type($this->owner)=='g')
			{
				$this->filter = ' all ';
			}

			$this->so = CreateObject('calendar.socalendar',
				Array(
					'owner'		=> $this->owner,
					'filter'	=> $this->filter,
					'category'	=> $this->cat_id,
					'g_owner'	=> $this->g_owner
				)
			);
			$this->rpt_day = array(	// need to be after creation of socalendar
				MCAL_M_SUNDAY    => 'Sunday',
				MCAL_M_MONDAY    => 'Monday',
				MCAL_M_TUESDAY   => 'Tuesday',
				MCAL_M_WEDNESDAY => 'Wednesday',
				MCAL_M_THURSDAY  => 'Thursday',
				MCAL_M_FRIDAY    => 'Friday',
				MCAL_M_SATURDAY  => 'Saturday'
			);
			if($this->bo->prefs['calendar']['weekdaystarts'] != 'Sunday')
			{
				$mcals = array_keys($this->rpt_day);
				$days  = array_values($this->rpt_day);
				$this->rpt_day = array();
				list($n) = $found = array_keys($days,$this->prefs['calendar']['weekdaystarts']);
				for ($i = 0; $i < 7; ++$i,++$n)
				{
					$this->rpt_day[$mcals[$n % 7]] = $days[$n % 7];
				}
			}
			$this->rpt_type = Array(
				MCAL_RECUR_NONE		=> 'None',
				MCAL_RECUR_SECONDLY	=> 'Secondly',
				MCAL_RECUR_MINUTELY	=> 'Minutely',
				MCAL_RECUR_HOURLY	=> 'Hourly',
				MCAL_RECUR_DAILY	=> 'Daily',
				MCAL_RECUR_WEEKLY	=> 'Weekly',
				MCAL_RECUR_MONTHLY_WDAY	=> 'Monthly (by day)',
				MCAL_RECUR_MONTHLY_MDAY	=> 'Monthly (by date)',
				MCAL_RECUR_YEARLY	=> 'Yearly'
			);

			$localtime = $GLOBALS['phpgw']->datetime->users_localtime;

			$this->num_months = (int) get_var('num_months',array('GET','POST'),1);
			
			$this->date = (int) get_var('date',array('GET','POST'));
			if($this->date)
			{
				$this->year  = (int) substr($this->date,0,4);
				$this->month = (int) substr($this->date,4,2);
				$this->day   = (int) substr($this->date,6,2);
			}
			else
			{
				foreach(array('year' => 'Y','month' => 'm','day' => 'd') as $var => $pat)
				{
					$this->$var = (int) get_var($var,array('POST','GET'),date($pat,$localtime));
				}
				$this->date = sprintf('%04d%02d%02d',$this->year,$this->month,$this->day);
			}
			$this->today = date('Ymd',$GLOBALS['phpgw']->datetime->users_localtime);

			if(DEBUG_APP)
			{
				print_debug('BO Filter','('.$this->filter.')');
				print_debug('Owner',$this->owner);
				print_debug('Today',$this->today);
				if(floor(phpversion()) >= 4)
				{
					$this->debug_string .= ob_get_contents();
					ob_end_clean();
				}
			}
			$this->xmlrpc = is_object($GLOBALS['server']) && $GLOBALS['server']->last_method;
		}

		function list_methods($_type='xmlrpc')
		{
			/*
			  This handles introspection or discovery by the logged in client,
			  in which case the input might be an array.  The server always calls
			  this function to fill the server dispatch map using a string.
			*/
			if (is_array($_type))
			{
				$_type = $_type['type'];
			}
			switch($_type)
			{
				case 'xmlrpc':
					$xml_functions = array(
						'list_methods' => array(
							'function'  => 'list_methods',
							'signature' => array(array(xmlrpcStruct,xmlrpcString)),
							'docstring' => lang('Read this list of methods.')
						),
						'read' => array(
							'function'  => 'read_entry',
							'signature' => array(array(xmlrpcStruct,xmlrpcInt)),
							'docstring' => lang('Read a single entry by passing the id and fieldlist.')
						),
						'read_entry' => array(	// deprecated, use read
							'function'  => 'read_entry',
							'signature' => array(array(xmlrpcStruct,xmlrpcInt)),
							'docstring' => lang('Read a single entry by passing the id and fieldlist.')
						),
						'write' => array(
							'function'  => 'update',
							'signature' => array(array(xmlrpcStruct,xmlrpcStruct)),
							'docstring' => lang('Add or update a single entry by passing the fields.')
						),
						'add_entry' => array(	// deprecated, use write
							'function'  => 'update',
							'signature' => array(array(xmlrpcStruct,xmlrpcStruct)),
							'docstring' => lang('Add a single entry by passing the fields.')
						),
						'update_entry' => array(	// deprecated, use write
							'function'  => 'update',
							'signature' => array(array(xmlrpcStruct,xmlrpcStruct)),
							'docstring' => lang('Update a single entry by passing the fields.')
						),
						'delete' => array(
							'function'  => 'delete_entry',
							'signature' => array(array(xmlrpcInt,xmlrpcInt)),
							'docstring' => lang('Delete a single entry by passing the id.')
						),
						'delete_entry' => array(	// deprecated, use delete
							'function'  => 'delete_entry',
							'signature' => array(array(xmlrpcInt,xmlrpcInt)),
							'docstring' => lang('Delete a single entry by passing the id.')
						),
						'delete_calendar' => array(
							'function'  => 'delete_calendar',
							'signature' => array(array(xmlrpcInt,xmlrpcInt)),
							'docstring' => lang('Delete an entire users calendar.')
						),
						'change_owner' => array(
							'function'  => 'change_owner',
							'signature' => array(array(xmlrpcInt,xmlrpcStruct)),
							'docstring' => lang('Change all events for $params[\'old_owner\'] to $params[\'new_owner\'].')
						),
						'search' => array(
							'function'  => 'store_to_cache',
							'signature' => array(array(xmlrpcStruct,xmlrpcStruct)),
							'docstring' => lang('Read a list of entries.')
						),
						'store_to_cache' => array(	// deprecated, use search
							'function'  => 'store_to_cache',
							'signature' => array(array(xmlrpcStruct,xmlrpcStruct)),
							'docstring' => lang('Read a list of entries.')
						),
						'export_event' => array(
							'function'  => 'export_event',
							'signature' => array(array(xmlrpcString,xmlrpcStruct)),
							'docstring' => lang('Export a list of entries in iCal format.')
						),
						'categories' => array(
							'function'  => 'categories',
							'signature' => array(array(xmlrpcStruct,xmlrpcStruct)),
							'docstring' => lang('List all categories.')
						),
					);
					return $xml_functions;
					break;
				case 'soap':
					return $this->soap_functions;
					break;
				default:
					return array();
					break;
			}
		}

		function set_owner_to_group($owner)
		{
			print_debug('calendar::bocalendar::set_owner_to_group:owner',$owner);
			$this->owner = (int)$owner;
			$this->is_group = True;
			$this->g_owner = Array();
			$members = $GLOBALS['phpgw']->accounts->member($owner);
			if (is_array($members))
			{
				foreach($members as $user)
				{
					// use only members which gave the user a read-grant
					if ($this->check_perms(PHPGW_ACL_READ,0,$user['account_id']))
					{
						$this->g_owner[] = $user['account_id'];
					}
				}
			}
			//echo "<p>".function_backtrace().": set_owner_to_group($owner) = ".print_r($this->g_owner,True)."</p>\n";
		}

		function member_of_group($owner=0)
		{
			$owner = ($owner==0?$GLOBALS['phpgw_info']['user']['account_id']:$owner);
			$group_owners = $GLOBALS['phpgw']->accounts->membership();
			while($group_owners && list($index,$group_info) = each($group_owners))
			{
				if($this->owner == $group_info['account_id'])
				{
					return True;
				}
			}
			return False;
		}

		function save_sessiondata($data='')
		{
			if ($this->use_session)
			{
				if (!is_array($data))
				{
					$data = array(
						'filter'     => $this->filter,
						'cat_id'     => $this->cat_id,
						'owner'      => $this->owner,
						'save_owner' => $this->save_owner,
						'year'       => $this->year,
						'month'      => $this->month,
						'day'        => $this->day,
						'date'       => $this->date,
						'sortby'     => $this->sortby,
						'num_months' => $this->num_months,
						'return_to'  => $this->return_to
					);
				}
				if($this->debug)
				{
					if(floor(phpversion()) >= 4)
					{
						ob_start();
					}
					echo '<!-- '."\n".'Save:'."\n"._debug_array($data,False)."\n".' -->'."\n";
					if(floor(phpversion()) >= 4)
					{
						$this->debug_string .= ob_get_contents();
						ob_end_clean();
					}
				}
				$GLOBALS['phpgw']->session->appsession('session_data','calendar',$data);
			}
		}

		function read_sessiondata()
		{
			$data = $GLOBALS['phpgw']->session->appsession('session_data','calendar');
			print_debug('Read',_debug_array($data,False));

			$this->filter = $data['filter'];
			$this->cat_id = $data['cat_id'];
			$this->sortby = $data['sortby'];
			$this->owner  = (int)$data['owner'];
			$this->save_owner = (int)$data['save_owner'];
			$this->year   = (int)$data['year'];
			$this->month  = (int)$data['month'];
			$this->day    = (int)$data['day'];
			$this->num_months = (int)$data['num_months'];
			$this->return_to = $data['return_to'];
		}

		function read_entry($id,$ignore_acl=False)
		{
			if (is_array($id) && count($id) == 1)
			{
				list(,$id) = each($id);
			}
			if($ignore_acl || $this->check_perms(PHPGW_ACL_READ,$id))
			{
				$event = $this->so->read_entry($id);
		
				if (isset($GLOBALS['phpgw_info']['apps']['infolog']))	// check if infolog is installed
				{
					$bolink = createObject('infolog.bolink');
					$linkIDs = $bolink->get_links('calendar', $id);
					if(is_array($linkIDs))
					{
						foreach($linkIDs as $linkData)
						{
							//$event['projectID'] = 8;
							if($linkData['app'] == 'projects')
							{
								$event['projectID'] = $linkData['id'];
								continue;
							}
						}
					}
				}
				if(!isset($event['participants'][$this->owner]) && $this->user_is_a_member($event,$this->owner))
				{
					$this->so->add_attribute('participants','U',(int)$this->owner);
					$this->so->add_entry($event);
					$event = $this->get_cached_event();
				}
				return $this->xmlrpc ? $this->xmlrpc_prepare($event) : $event;
			}
			if ($this->xmlrpc)
			{
				$GLOBALS['server']->xmlrpc_error($GLOBALS['xmlrpcerr']['no_access'],$GLOBALS['xmlrpcstr']['no_access']);
			}
			return False;
		}

		function delete_single($param)
		{
			if($this->check_perms(PHPGW_ACL_DELETE,(int)$param['id']))
			{
				$temp_event = $this->get_cached_event();
				$event = $this->read_entry((int)$param['id']);
//				if($this->owner == $event['owner'])
//				{
				$exception_time = mktime($event['start']['hour'],$event['start']['min'],0,$param['month'],$param['day'],$param['year']) - $GLOBALS['phpgw']->datetime->tz_offset;
				$event['recur_exception'][] = (int)$exception_time;
				$this->so->cal->event = $event;
//				print_debug('exception time',$event['recur_exception'][count($event['recur_exception']) -1]);
//				print_debug('count event exceptions',count($event['recur_exception']));
				$this->so->add_entry($event);
				$cd = 16;

				$this->so->cal->event = $temp_event;
				unset($temp_event);
			}
			else
			{
				$cd = 60;
			}
//			}
			return $cd;
		}

		function delete_entry($id)
		{
			if (is_array($id) && count($id) == 1)
			{
				list(,$id) = each($id);
			}
			if($this->check_perms(PHPGW_ACL_DELETE,$id))
			{
				$this->so->delete_entry($id);
				$GLOBALS['phpgw']->contenthistory->updateTimeStamp('calendar', $id, 'delete', time());

				if ($this->xmlrpc)
				{
					$this->so->expunge($id);
				}
				return $this->xmlrpc ? True : 16;
			}
			if ($this->xmlrpc)
			{
				$GLOBALS['server']->xmlrpc_error($GLOBALS['xmlrpcerr']['no_access'],$GLOBALS['xmlrpcstr']['no_access']);
			}
			return 60;
		}

		function reinstate($params='')
		{
			if($this->check_perms(PHPGW_ACL_EDIT,$params['cal_id']) && isset($params['reinstate_index']))
			{
				$event = $this->so->read_entry($params['cal_id']);
				@reset($params['reinstate_index']);
				print_debug('Count of reinstate_index',count($params['reinstate_index']));
				if(count($params['reinstate_index']) > 1)
				{
					while(list($key,$value) = each($params['reinstate_index']))
					{
						print_debug('reinstate_index ['.$key.']',(int)$value);
						print_debug('exception time',$event['recur_exception'][(int)$value]);
						unset($event['recur_exception'][(int)$value]);
						print_debug('count event exceptions',count($event['recur_exception']));
					}
				}
				else
				{
					print_debug('reinstate_index[0]',(int)$params['reinstate_index'][0]);
					print_debug('exception time',$event['recur_exception'][(int)$params['reinstate_index'][0]]);
					unset($event['recur_exception'][(int)$params['reinstate_index'][0]]);
					print_debug('count event exceptions',count($event['recur_exception']));
				}
				$this->so->cal->event = $event;
				$this->so->add_entry($event);
				return 42;
			}
			else
			{
				return 43;
			}
		}

		function delete_calendar($owner)
		{
			if($GLOBALS['phpgw_info']['user']['apps']['admin'])
			{
				$this->so->delete_calendar($owner);
			}
		}

		function change_owner($params='')
		{
			if($GLOBALS['phpgw_info']['server']['calendar_type'] == 'sql')
			{
				if(is_array($params))
				{
					$this->so->change_owner($params['old_owner'],$params['new_owner']);
				}
			}
		}

		function expunge()
		{
			reset($this->so->cal->deleted_events);
			while(list($i,$event_id) = each($this->so->cal->deleted_events))
			{
				$event = $this->so->read_entry($event_id);
				if($this->check_perms(PHPGW_ACL_DELETE,$event))
				{
					$this->send_update(MSG_DELETED,$event['participants'],$event);
				}
				else
				{
					unset($this->so->cal->deleted_events[$i]);
				}
			}
			$this->so->expunge();
		}

		function search_keywords($keywords)
		{
			$type = $GLOBALS['phpgw']->accounts->get_type($this->owner);

			if($type == 'g')
			{
				$members = $GLOBALS['phpgw']->acl->get_ids_for_location($this->owner, 1, 'phpgw_group');
			}
			else
			{
				$members = array_keys($this->grants);

				if (!in_array($this->owner,$members))
				{
					$members[] = $this->owner;
				}
			}
			foreach($members as $n => $uid)
			{
				if (!($this->grants[$uid] & PHPGW_ACL_READ))
				{
					unset($members[$n]);
				}
			}
			return $this->so->list_events_keyword($keywords,$members);
		}

		function update($params='')
		{
			$l_cal = (@isset($params['cal']) && $params['cal']?$params['cal']:$_POST['cal']);
			$l_participants = (@$params['participants']?$params['participants']:$_POST['participants']);
			$l_categories = (@$params['categories']?$params['categories']:$_POST['categories']);
			$l_start = (@isset($params['start']) && $params['start']?$params['start']:$_POST['start']);
			$l_end = (@isset($params['end']) && $params['end']?$params['end']:$_POST['end']);
			$l_recur_enddate = (@isset($params['recur_enddate']) && $params['recur_enddate']?$params['recur_enddate']:$_POST['recur_enddate']);

			$send_to_ui = True;
			//if ((!is_array($l_start) || !is_array($l_end)) && !isset($_GET['readsess']))	// xmlrpc call
			if ($this->xmlrpc)	// xmlrpc call
			{
				$send_to_ui = False;

				$l_cal = $params;	// no extra array

				foreach(array('start','end','recur_enddate') as $name)
				{
					$var = 'l_'.$name;
					$$var = $GLOBALS['server']->iso86012date($params[$name]);
					unset($l_cal[$name]);
				}
				if (!is_array($l_participants) || !count($l_participants))
				{
					$l_participants = array($GLOBALS['phpgw_info']['user']['account_id'] /*.'A'*/);
				}
				else
				{
					$l_participants = array();
					foreach($params['participants'] as $user => $data)
					{
						if (!is_numeric($user))
						{
							$user = $GLOBALS['phpgw']->accounts->name2id($user,'account_email');
						}
						$l_participants[] = $user /*.$data['status']*/;
					}
				}
				unset($l_cal['participants']);

				if (!is_object($GLOBALS['phpgw']->categories))
				{
					$GLOBALS['phpgw']->categories = CreateObject('phpgwapi.categories');
				}
				$l_categories = $GLOBALS['server']->xmlrpc2cats($params['category']);
				unset($l_cal['category']);

				// using access={public|private} in all modules via xmlrpc
				$l_cal['public'] = $params['access'] != 'private';
				unset($l_cal['access']);
/*
				$fp = fopen('/tmp/xmlrpc.log','a+');
				ob_start();
				echo "\nbocalendar::update("; print_r($params); echo ")\n";
				//echo "\nl_start="; print_r($l_start);
				//echo "\nl_end="; print_r($l_end);
				fwrite($fp,ob_get_contents());
				ob_end_clean();
				fclose($fp);
*/
			}
			print_debug('ID',$l_cal['id']);

			// don't wrap to the next day for no time
			if ($l_end['hour'] == 24 && $l_end['min'] == 0)
			{
				$l_end['hour'] = 23;
				$l_end['min'] = 59;
			}

			if(isset($_GET['readsess']))
			{
				$event = $this->restore_from_appsession();
				$event['title'] = stripslashes($event['title']);
				$event['description'] = stripslashes($event['description']);
				$datetime_check = $this->validate_update($event);
				if($datetime_check)
				{
					ExecMethod('calendar.uicalendar.edit',
						Array(
							'cd'		=> $datetime_check,
							'readsess'	=> 1
						)
					);
					$GLOBALS['phpgw']->common->phpgw_exit(True);
				}
				$overlapping_events = False;
			}
			else
			{
				if((!$l_cal['id'] && !$this->check_perms(PHPGW_ACL_ADD)) ||
				   ($l_cal['id'] && !$this->check_perms(PHPGW_ACL_EDIT,$l_cal['id'])))
				{
					if ($this->xmlrpc)
					{
						$GLOBALS['server']->xmlrpc_error($GLOBALS['xmlrpcerr']['no_access'],$GLOBALS['xmlrpcstr']['no_access']);
					}
					if (!$send_to_ui)
					{
						return array(($l_cal['id']?1:2) => 'permission denied');
					}
					ExecMethod('calendar.uicalendar.index');
					$GLOBALS['phpgw']->common->phpgw_exit();
				}
				// reading the old event-state, to preserver the participant status
				$old_event = $l_cal['id'] ? $this->so->read_entry((int) $l_cal['id']) : False;

				print_debug('Prior to fix_update_time()');
				$this->fix_update_time($l_start);
				$this->fix_update_time($l_end);

				if(!isset($l_cal['private']))
				{
					$l_cal['private'] = 'public';
				}

				if(!isset($l_categories))
				{
					$l_categories = 0;
				}

				$is_public = (int)(isset($l_cal['public']) ? $l_cal['public'] : $l_cal['private'] == 'public');
				$this->so->event_init();
				$this->add_attribute('uid',$l_cal['uid']);
				if(count($l_categories) >= 2)
				{
					$this->so->set_category(implode(',',$l_categories));
				}
				else
				{
					$this->so->set_category(strval($l_categories[0]));
				}
				foreach(array('title','description','location') as $name)
				{
					$l_cal[$name] = strip_tags($l_cal[$name]);
				}
				$this->so->set_title($l_cal['title']);
				$this->so->set_description($l_cal['description']);
				$this->so->set_start($l_start['year'],$l_start['month'],$l_start['mday'],$l_start['hour'],$l_start['min'],0);
				$this->so->set_end($l_end['year'],$l_end['month'],$l_end['mday'],$l_end['hour'],$l_end['min'],0);
				$this->so->set_class($is_public);
				$this->so->add_attribute('reference',(@isset($l_cal['reference']) && $l_cal['reference']?$l_cal['reference']:0));
				$this->so->add_attribute('location',(@isset($l_cal['location']) && $l_cal['location']?$l_cal['location']:''));
				if($l_cal['id'])
				{
					$this->so->add_attribute('id',$l_cal['id']);
				}

				if( ($l_cal['rpt_use_end'] != 'y') && !$this->xmlrpc )
				{
					$l_recur_enddate['year'] = 0;
					$l_recur_enddate['month'] = 0;
					$l_recur_enddate['mday'] = 0;
				}
				elseif (isset($l_recur_enddate['str']))
				{
					$l_recur_enddate = $this->jscal->input2date($l_recur_enddate['str'],False,'mday');
				}

				switch((int)$l_cal['recur_type'])
				{
					case MCAL_RECUR_NONE:
						$this->so->set_recur_none();
						break;
					case MCAL_RECUR_SECONDLY:
						$this->so->set_recur_secondly((int)$l_recur_enddate['year'],(int)$l_recur_enddate['month'],(int)$l_recur_enddate['mday'],(int)$l_cal['recur_interval']);
						break;
					case MCAL_RECUR_MINUTELY:
						$this->so->set_recur_minutely((int)$l_recur_enddate['year'],(int)$l_recur_enddate['month'],(int)$l_recur_enddate['mday'],(int)$l_cal['recur_interval']);
						break;
					case MCAL_RECUR_HOURLY:
						$this->so->set_recur_hourly((int)$l_recur_enddate['year'],(int)$l_recur_enddate['month'],(int)$l_recur_enddate['mday'],(int)$l_cal['recur_interval']);
						break;
					case MCAL_RECUR_DAILY:
						$this->so->set_recur_daily((int)$l_recur_enddate['year'],(int)$l_recur_enddate['month'],(int)$l_recur_enddate['mday'],(int)$l_cal['recur_interval']);
						break;
					case MCAL_RECUR_WEEKLY:
						foreach(array('rpt_sun','rpt_mon','rpt_tue','rpt_wed','rpt_thu','rpt_fri','rpt_sat') as $rpt_day)
						{
							$l_cal['recur_data'] += (int)$l_cal[$rpt_day];
						}
						if (is_array($l_cal['rpt_day']))
						{
							foreach ($l_cal['rpt_day'] as $mask)
							{
								$l_cal['recur_data'] |= (int)$mask;
							}
						}
						if (!$l_cal['recur_data'])	// no day set ==> use the day of the startdate
						{
							$l_cal['recur_data'] = array_search(date('l',$this->maketime($l_start)-$GLOBALS['phpgw']->datetime->tz_offset),$this->rpt_day);
						}
						$this->so->set_recur_weekly((int)$l_recur_enddate['year'],(int)$l_recur_enddate['month'],(int)$l_recur_enddate['mday'],(int)$l_cal['recur_interval'],$l_cal['recur_data']);
						break;
					case MCAL_RECUR_MONTHLY_MDAY:
						$this->so->set_recur_monthly_mday((int)$l_recur_enddate['year'],(int)$l_recur_enddate['month'],(int)$l_recur_enddate['mday'],(int)$l_cal['recur_interval']);
						break;
					case MCAL_RECUR_MONTHLY_WDAY:
						$this->so->set_recur_monthly_wday((int)$l_recur_enddate['year'],(int)$l_recur_enddate['month'],(int)$l_recur_enddate['mday'],(int)$l_cal['recur_interval']);
						break;
					case MCAL_RECUR_YEARLY:
						$this->so->set_recur_yearly((int)$l_recur_enddate['year'],(int)$l_recur_enddate['month'],(int)$l_recur_enddate['mday'],(int)$l_cal['recur_interval']);
						break;
				}
				// restoring the recur-exceptions from the old event
				if ($l_cal['recur_type'] != MCAL_RECUR_NONE && $old_event && count($old_event['recur_exception']))
				{
					$this->so->add_attribute('recur_exception',$old_event['recur_exception']);
				}

				if($l_participants)
				{
					$parts = $l_participants;
					$minparts = min($l_participants);
					$part = Array();
					for($i=0;$i<count($parts);$i++)
					{
						// fetching the accept-type from the old version of the event
						$accept_type = $old_event && isset($old_event['participants'][$parts[$i]]) ? $old_event['participants'][$parts[$i]] : 'U';

						$acct_type = $GLOBALS['phpgw']->accounts->get_type((int)$parts[$i]);
						if($acct_type == 'u')
						{
							$part[(int)$parts[$i]] = $accept_type;
						}
						elseif($acct_type == 'g')
						{
							$part[(int)$parts[$i]] = $accept_type;
							$groups[] = $parts[$i];
							/* This pulls ALL users of a group and makes them as participants to the event */
							/* I would like to turn this back into a group thing. */
							$acct = CreateObject('phpgwapi.accounts',(int)$parts[$i]);
							$members = $acct->member((int)$parts[$i]);
							unset($acct);
							if($members == False)
							{
								continue;
							}
							while($member = each($members))
							{
								$part[$member[1]['account_id']] = $accept_type;
							}
						}
					}
				}
				else
				{
					$part = False;
				}

				if($part)
				{
					@reset($part);
					while(list($key,$accept_type) = each($part))
					{
						$this->so->add_attribute('participants',$accept_type,(int)$key);
					}
				}

				if($groups)
				{
					@reset($groups);
					$this->so->add_attribute('groups',(int)$group_id);
				}

				$event = $this->get_cached_event();
				if(!is_int($minparts))
				{
					$minparts = $this->owner;
				}
				if(!@isset($event['participants'][$l_cal['owner']]))
				{
					$this->so->add_attribute('owner',$minparts);
				}
				else
				{
					$this->so->add_attribute('owner',$l_cal['owner']);
				}
				$this->so->add_attribute('priority',$l_cal['priority']);

				foreach($l_cal as $name => $value)
				{
					if ($name[0] == '#')	// Custom field
					{
						$this->so->add_attribute($name,stripslashes($value));
					}
				}
				if (isset($_POST['preserved']) && is_array($preserved = unserialize(stripslashes($_POST['preserved']))))
				{
					foreach($preserved as $name => $value)
					{
						switch($name)
						{
							case 'owner':
								$this->so->add_attribute('participants',$value,$l_cal['owner']);
								break;
							default:
								$this->so->add_attribute($name,str_replace(array('&amp;','&quot;','&lt;','&gt;'),array('&','"','<','>'),$value));
						}
					}
				}
				$event = $this->get_cached_event();

				if ($l_cal['alarmdays'] > 0 || $l_cal['alarmhours'] > 0 ||
						$l_cal['alarmminutes'] > 0)
				{
					$offset = ($l_cal['alarmdays'] * 24 * 3600) +
						($l_cal['alarmhours'] * 3600) + ($l_cal['alarmminutes'] * 60);

					$time = $this->maketime($event['start']) - $offset;

					$event['alarm'][] = Array(
						'time'    => $time,
						'offset'  => $offset,
						'owner'   => $this->owner,
						'enabled' => 1
					);
				}

				$this->store_to_appsession($event);
				$datetime_check = $this->validate_update($event);
				print_debug('bo->validated_update() returnval',$datetime_check);
				if($datetime_check)
				{
					if (!$send_to_ui)
					{
						return array($datetime_check => 'invalid input data');
					}
					ExecMethod('calendar.uicalendar.edit',
						Array(
							'cd'		=> $datetime_check,
							'readsess'	=> 1
						)
					);
					$GLOBALS['phpgw']->common->phpgw_exit(True);
				}

				if($event['id'])
				{
					$event_ids[] = $event['id'];
				}
				if($event['reference'])
				{
					$event_ids[] = $event['reference'];
				}

				$overlapping_events = $this->overlap(
					$this->maketime($event['start']),
					$this->maketime($event['end']),
					$event['participants'],
					$event['owner'],
					$event_ids
				);
			}
			if($overlapping_events)
			{
				if($send_to_ui)
				{
					unset($GLOBALS['phpgw_info']['flags']['noheader']);
					unset($GLOBALS['phpgw_info']['flags']['nonavbar']);
					ExecMethod('calendar.uicalendar.overlap',
						Array(
							'o_events'	=> $overlapping_events,
							'this_event'	=> $event
						)
					);
					$GLOBALS['phpgw']->common->phpgw_exit(True);
				}
				else
				{
					return $overlapping_events;
				}
			}
			else
			{
				if(!$event['id'])
				{
					$this->so->add_entry($event);
					$this->send_update(MSG_ADDED,$event['participants'],'',$this->get_cached_event());
					$GLOBALS['phpgw']->contenthistory->updateTimeStamp('calendar', $event['id'], 'add', time());
					print_debug('New Event ID',$event['id']);
				}
				else
				{
					print_debug('Updating Event ID',$event['id']);
					$new_event = $event;
					$old_event = $this->read_entry($event['id']);
					// if old event has alarm and the start-time changed => update them
					//echo "<p>checking ".count($old_event['alarm'])." alarms of event #$event[id] start moved from ".print_r($old_event['start'],True)." to ".print_r($event['start'],True)."</p>\n";
					if ($old_event['alarm'] &&
						$this->maketime($old_event['start']) != $this->maketime($event['start']))
					{
						$this->so->delete_alarms($old_event['id']);
						foreach($old_event['alarm'] as $id => $alarm)
						{
							$alarm['time'] = $this->maketime($event['start']) - $alarm['offset'];
							$event['alarm'][] = $alarm;
						}
						//echo "updated alarms<pre>".print_r($event['alarm'],True)."</pre>\n";
					}
					$this->so->cal->event = $event;
					$this->so->add_entry($event);
					$GLOBALS['phpgw']->contenthistory->updateTimeStamp('calendar', $event['id'], 'modify', time());
					$this->prepare_recipients($new_event,$old_event);
				}

				$date = sprintf("%04d%02d%02d",$event['start']['year'],$event['start']['month'],$event['start']['mday']);
				// check if infolog is availible
				if(isset($GLOBALS['phpgw_info']['apps']['infolog']) && isset($l_cal['project']))
				{
					$bolink = createObject('infolog.bolink');
					$bolink->unlink(0,'calendar',$event['id']);
					if($l_cal['project'] != 'no_project')
					{
						$bolink->link('calendar',$event['id'],'projects',$l_cal['project']);
					}
				}
				
				// just a hook
				$singleHookValues = array
				(
					'location'	=> 'updateevent',
					'hookValues'	=> $event
				);
				$GLOBALS['phpgw']->hooks->process($singleHookValues);
				
				if($send_to_ui)
				{
					$this->read_sessiondata();
					if ($this->return_to)
					{
						$GLOBALS['phpgw']->redirect_link('/index.php','menuaction='.$this->return_to);
						$GLOBALS['phpgw']->common->phpgw_exit();
					}
					Execmethod('calendar.uicalendar.index');
				}
				else
				{
					return (int)$event['id'];
				}
			}
			return True;
		}

		/* Private functions */
		function read_holidays($year=0)
		{
			if(!$year)
			{
				$year = $this->year;
			}
			$holiday = CreateObject('calendar.boholiday');
			$holiday->prepare_read_holidays($year,$this->owner);
			$this->cached_holidays = $holiday->read_holiday();
			unset($holiday);
		}

		function user_is_a_member($event,$user)
		{
			@reset($event['participants']);
			$uim = False;
			$security_equals = $GLOBALS['phpgw']->accounts->membership($user);
			while(!$uim && $event['participants'] && $security_equals && list($participant,$status) = each($event['participants']))
			{
				if($GLOBALS['phpgw']->accounts->get_type($participant) == 'g')
				{
					@reset($security_equals);
					while(list($key,$group_info) = each($security_equals))
					{
						if($group_info['account_id'] == $participant)
						{
							return True;
							$uim = True;
						}
					}
				}
			}
			return $uim;
		}

		function maketime($time)
		{
			return mktime($time['hour'],$time['min'],$time['sec'],$time['month'],$time['mday'],$time['year']);
		}

		/*!
		@function time2array
		@abstract returns a date-array suitable for the start- or endtime of an event from a timestamp
		@syntax time2array($time,$alarm=0)
		@param $time the timestamp for the values of the array
		@param $alarm (optional) alarm field of the array, defaults to 0
		@author ralfbecker
		*/
		function time2array($time,$alarm = 0)
		{
			return array(
				'year'  => (int)(date('Y',$time)),
				'month' => (int)(date('m',$time)),
				'mday'  => (int)(date('d',$time)),
				'hour'  => (int)(date('H',$time)),
				'min'   => (int)(date('i',$time)),
				'sec'   => (int)(date('s',$time)),
				'alarm' => (int)($alarm)
			);
		}

		/*!
		@function set_recur_date
		@abstract set the start- and enddates of a recuring event for a recur-date
		@syntax set_recur_date(&$event,$date)
		@param $event the event which fields to set (has to be the original event for start-/end-times)
		@param $date  the recuring date in form 'Ymd', eg. 20030226
		@author ralfbecker
		*/
		function set_recur_date(&$event,$date)
		{
			$org_start = $this->maketime($event['start']);
			$org_end   = $this->maketime($event['end']);
			$start = mktime($event['start']['hour'],$event['start']['min'],0,substr($date,4,2),substr($date,6,2),substr($date,0,4));
			$end   = $org_end + $start - $org_start;
			$event['start'] = $this->time2array($start);
			$event['end']   = $this->time2array($end);
		}

		function fix_update_time(&$time_param)
		{
			if (isset($time_param['str']))
			{
				if (!is_object($this->jscal))
				{
					if (!is_object($GLOBALS['phpgw']->jscalendar))
					{
						$GLOBALS['phpgw']->jscalendar = CreateObject('phpgwapi.jscalendar');
					}
					$this->jscal = &$GLOBALS['phpgw']->jscalendar;
				}
				$time_param += $this->jscal->input2date($time_param['str'],False,'mday');
				unset($time_param['str']);
			}
			if ($this->prefs['common']['timeformat'] == '12')
			{
				if ($time_param['ampm'] == 'pm')
				{
					if ($time_param['hour'] <> 12)
					{
						$time_param['hour'] += 12;
					}
				}
				elseif ($time_param['ampm'] == 'am')
				{
					if ($time_param['hour'] == 12)
					{
						$time_param['hour'] -= 12;
					}
				}

				if($time_param['hour'] > 24)
				{
					$time_param['hour'] -= 12;
				}
			}
		}

		function validate_update($event)
		{
			$error = 0;
			// do a little form verifying
			if (!count($event['participants']))
			{
				$error = 43;
			}
			elseif ($event['title'] == '')
			{
				$error = 40;
			}
			elseif (($GLOBALS['phpgw']->datetime->time_valid($event['start']['hour'],$event['start']['min'],0) == False) || ($GLOBALS['phpgw']->datetime->time_valid($event['end']['hour'],$event['end']['min'],0) == False))
			{
				$error = 41;
			}
			elseif (($GLOBALS['phpgw']->datetime->date_valid($event['start']['year'],$event['start']['month'],$event['start']['mday']) == False) || ($GLOBALS['phpgw']->datetime->date_valid($event['end']['year'],$event['end']['month'],$event['end']['mday']) == False) || ($GLOBALS['phpgw']->datetime->date_compare($event['start']['year'],$event['start']['month'],$event['start']['mday'],$event['end']['year'],$event['end']['month'],$event['end']['mday']) == 1))
			{
				$error = 42;
			}
			elseif ($GLOBALS['phpgw']->datetime->date_compare($event['start']['year'],$event['start']['month'],$event['start']['mday'],$event['end']['year'],$event['end']['month'],$event['end']['mday']) == 0)
			{
				if ($GLOBALS['phpgw']->datetime->time_compare($event['start']['hour'],$event['start']['min'],0,$event['end']['hour'],$event['end']['min'],0) == 1)
				{
					$error = 42;
				}
			}
			return $error;
		}

		/*!
		@function participants_not_rejected($participants,$event)
		@abstract checks if any of the $particpants participates in $event and has not rejected it
		*/
		function participants_not_rejected($participants,$event)
		{
			//echo "participants_not_rejected()<br>participants =<pre>"; print_r($participants); echo "</pre><br>event[participants]=<pre>"; print_r($event['participants']); echo "</pre>\n";
			foreach($participants as $uid => $status)
			{
				//echo "testing event[participants][uid=$uid] = '".$event['participants'][$uid]."'<br>\n";
				if (isset($event['participants'][$uid]) && $event['participants'][$uid] != 'R' &&
					$status != 'R')
				{
					return True;	// found not rejected participant in event
				}
			}
			return False;
		}
		
		/**
		 * Checks if two timespans overlap, starting at the exact time where the other span ends is Ok
		 *
		 * @param int $start1 start 1. timespan
		 * @param int $end1 end 1. timespan
		 * @param int $start2 start 2. timespan
		 * @param int $end2 end 2. timespan
		 * @param int > 0 if there is an overlap, 0 otherwise
		 */
		function overlaps($start1,$end1,$start2,$end2)
		{
			//echo "bocalendar::overlaps($start1=".date('Y-m-d H:i:s',$start1).", $end1=".date('Y-m-d H:i:s',$end1).", $start2=".date('Y-m-d H:i:s',$start2).", $end2=".date('Y-m-d H:i:s',$end2).")<br>\n";
			
			if ($start1 <= $start2 && $end2 <= $end1)	// 1 contains 2 complete
			{
				//echo "==> 1 contains 2 complete<br>\n";
				return 1;
			}
			if ($start2 <= $start1 && $end1 <= $end2)	// 2 contains 1 complete
			{
				//echo "==> 2 contains 1 complete<br>\n";
				return 2;
			}
			if ($start1 < $start2 && $start2 < $end1)	// start of 2 is in 1
			{
				//echo "==> start of 2 is in 1<br>\n";
				return 3;
			}
			if ($start1 < $end2 && $end2 < $end1)			// end of 2 is in 1
			{
				//echo "==> end of 2 is in 1<br>\n";
				return 4;
			}
			return 0;
		}

		function overlap($starttime,$endtime,$participants,$owner=0,$ids=0,$restore_cache=False)
		{
			$retval = False;

			if($restore_cache)
			{
				$temp_cache_events = $this->cached_events;
			}

			$temp_start = (int)(date('Ymd',$starttime));
			$temp_end = (int)(date('Ymd',$endtime));
			if($this->debug)
			{
				echo '<!-- Temp_Start: '.$temp_start.' -->'."\n";
				echo '<!-- Temp_End: '.$temp_end.' -->'."\n";
			}

			$users = Array();
			if(count($participants))
			{
				foreach($participants as $user => $status)
				{
					$users[] = $user;
				}
			}
			else
			{
				$users[] = $this->owner;
			}

			$possible_conflicts = $this->store_to_cache(
				Array(
					'smonth'	=> substr(strval($temp_start),4,2),
					'sday'	=> substr(strval($temp_start),6,2),
					'syear'	=> substr(strval($temp_start),0,4),
					'emonth'	=> substr(strval($temp_end),4,2),
					'eday'	=> substr(strval($temp_end),6,2),
					'eyear'	=> substr(strval($temp_end),0,4),
					'owner'	=> $users
				)
			);

			for($ts = $starttime; $ts <= $endtime; $ts += 24*60*60)
			{
				$check_ymd = (int) date('Ymd',$ts);
				if (isset($possible_conflicts[$check_ymd]) && is_array($possible_conflicts[$check_ymd]) &&
					count($possible_conflicts[$check_ymd]))
				{
					if($this->debug)
					{
						echo '<!-- Found '.count($possible_conflicts[$check_ymd]).' possible conflicts for date '.$check_ymd.' -->'."\n";
					}
					foreach($possible_conflicts[$check_ymd] as $event)
					{
						$found = False;
						if(is_array($ids))
						{
							foreach($ids as $event_id)
							{
								if($this->debug)
								{
									echo '<!-- Checking '.$event['id'].' == '.$event_id.' -->'."\n";
								}
								if($event['id'] == $event_id)
								{
									$found = True;	// conflict with original event, is no conflict
									break;
								}
							}
						}
						if (!$found)
						{
							if($this->debug)
							{
								echo '<!-- conflict with a different event: '.($found?'No':'Yes').' -->'."<br>\n";
							}
							if($this->debug)
							{
								echo '<!-- Checking event id #'.$event['id'];
							}
							$event_start = $this->maketime($event['start']);
							$event_end   = $this->maketime($event['end']);
							if ($this->overlaps($starttime,$endtime,$event_start,$event_end) &&
								$this->participants_not_rejected($participants,$event))
							{
								if($this->debug)
								{
									echo ' Conflicts';
								}
								if (!is_array($retval) || !in_array($event['id'],$retval)) $retval[] = $event['id'];
							}
							if($this->debug)
							{
								echo ' -->'."\n";
							}
						}					
					}
				}
			}
			if($restore_cache)
			{
				$this->cached_events = $temp_cache_events;
			}
			return $retval;
		}

		/*!
		@function check_perms( )
		@syntax check_perms($needed,$event=0,$other=0)
		@abstract Checks if the current user has the necessary ACL rights
		@author ralfbecker
		@discussion The check is performed on an event or general on the cal of an other user
		@param $needed necessary ACL right: PHPGW_ACL_{READ|EDIT|DELETE}
		@param $event event as array or the event-id or 0 for general check
		@param $other uid to check (if event==0) or 0 to check against $this->owner
		@note Participating in an event is considered as haveing read-access AND private-access on that event, \
			even if you have no general read- or private-grant from that user.
		*/
		function check_perms($needed,$event=0,$other=0)
		{
			$event_in = $event;
			if (is_int($event) && $event == 0)
			{
				$owner = $other > 0 ? $other : $this->owner;
			}
			else
			{
				if (!is_array($event))
				{
					$event = $this->so->read_entry((int) $event);
				}
				if (!is_array($event))
				{
					if ($this->xmlrpc)
					{
						$GLOBALS['server']->xmlrpc_error($GLOBALS['xmlrpcerr']['not_exist'],$GLOBALS['xmlrpcstr']['not_exist']);
					}
					return False;
				}
				$owner = $event['owner'];
				$private = $event['public'] == False || $event['public'] == 0;
			}
			$user = $GLOBALS['phpgw_info']['user']['account_id'];
			$grants = $this->grants[$owner];

			if (is_array($event) && $needed == PHPGW_ACL_READ)
			{
				// Check if the $user is one of the participants or has a read-grant from one of them
				// in that case he has an implicite READ grant for that event
				//
				if (isset($event['participants']) && is_array($event['participants']))
				{
					foreach($event['participants'] as $uid => $accept)
					{
						if ($uid == $user) 
						{
							// if we are a participant, we have an implicite READ and PRIVAT grant
							$grants |= PHPGW_ACL_READ | PHPGW_ACL_PRIVATE;
							break;
						}
						elseif ($this->grants[$uid] & PHPGW_ACL_READ)
						{
							// if we have a READ grant from a participant, we dont give an implicit privat grant too
							$grants |= PHPGW_ACL_READ;
							// we cant break here, as we might be a participant too, and would miss the privat grant 
						}	
					}
				}
			}

			if ($GLOBALS['phpgw']->accounts->get_type($owner) == 'g' && $needed == PHPGW_ACL_ADD)
			{
				$access = False;	// a group can't be the owner of an event
			}
			else
			{
				$access = $user == $owner || $grants & $needed && (!$private || $grants & PHPGW_ACL_PRIVATE);
			}
			//echo "<p>".function_backtrace()." check_perms($needed,$event_id,$other) for user $user and needed_acl $needed: event='$event[title]': owner=$owner, private=$private, grants=$grants ==> access=$access</p>\n";

			return $access;
		}


		function display_status($user_status)
		{
			if(@$this->prefs['calendar']['display_status'] && $user_status)
			{
				$user_status = substr($this->get_long_status($user_status),0,1);

				return ' ('.$user_status.')';
			}
			else
			{
				return '';
			}
		}

		function get_long_status($status_short)
		{
			switch ($status_short)
			{
				case 'A':
					$status = lang('Accepted');
					break;
				case 'R':
					$status = lang('Rejected');
					break;
				case 'T':
					$status = lang('Tentative');
					break;
				case 'U':
					$status = lang('No Response');
					break;
			}
			return $status;
		}

		function is_private($event,$owner)
		{
			if($owner == 0)
			{
				$owner = $this->owner;
			}
			if ($owner == $GLOBALS['phpgw_info']['user']['account_id'] || ($event['public']==1) || ($this->check_perms(PHPGW_ACL_PRIVATE,$event) && $event['public']==0) || $event['owner'] == $GLOBALS['phpgw_info']['user']['account_id'])
			{
				return False;
			}
			elseif($event['public'] == 0)
			{
				return True;
			}
			elseif($event['public'] == 2)
			{
				$is_private = True;
				$groups = $GLOBALS['phpgw']->accounts->membership($owner);
				while (list($key,$group) = each($groups))
				{
					if (strpos(' '.implode(',',$event['groups']).' ',$group['account_id']))
					{
						return False;
					}
				}
			}
			else
			{
				return False;
			}

			return $is_private;
		}

		function get_short_field($event,$is_private=True,$field='')
		{
			if($is_private)
			{
				return lang('private');
			}

// cut off too long titles
			elseif(strlen($event[$field]) > 19 && !$this->printer_friendly && $field=="title")
//			elseif(strlen($event[$field]) > 19 && $this->printer_friendly)
			{
// we dont use currently 160304
//				return substr($event[$field], 0 , 19) . '&nbsp;...';
				return $event[$field];
			}
			else
			{
				return $event[$field];
			}
		}

		function long_date($first,$last=0)
		{
			if (!is_array($first))
			{
				$first = $this->time2array($raw = $first);
				$first['raw'] = $raw;
				$first['day'] = $first['mday'];
			}
			if ($last && !is_array($last))
			{
				$last = $this->time2array($raw = $last);
				$last['raw'] = $raw;
				$last['day'] = $last['mday'];
			}
			$datefmt = $this->prefs['common']['dateformat'];

			$month_before_day = strtolower($datefmt[0]) == 'm' ||
				strtolower($datefmt[2]) == 'm' && $datefmt[4] == 'd';

			for ($i = 0; $i < 5; $i += 2)
			{
				switch($datefmt[$i])
				{
					case 'd':
						$range .= $first['day'] . ($datefmt[1] == '.' ? '.' : '');
						if ($first['month'] != $last['month'] || $first['year'] != $last['year'])
						{
							if (!$month_before_day)
							{
								$range .= ' '.lang(strftime('%B',$first['raw']));
							}
							if ($first['year'] != $last['year'] && $datefmt[0] != 'Y')
							{
								$range .= ($datefmt[0] != 'd' ? ', ' : ' ') . $first['year'];
							}
							if (!$last)
							{
								return $range;
							}
							$range .= ' - ';

							if ($first['year'] != $last['year'] && $datefmt[0] == 'Y')
							{
								$range .= $last['year'] . ', ';
							}

							if ($month_before_day)
							{
								$range .= lang(strftime('%B',$last['raw']));
							}
						}
						else
						{
							$range .= ' - ';
						}
						$range .= ' ' . $last['day'] . ($datefmt[1] == '.' ? '.' : '');
						break;
					case 'm':
					case 'M':
						$range .= ' '.lang(strftime('%B',$month_before_day ? $first['raw'] : $last['raw'])) . ' ';
						break;
					case 'Y':
						$range .= ($datefmt[0] == 'm' ? ', ' : ' ') . ($datefmt[0] == 'Y' ? $first['year'].($datefmt[2] == 'd' ? ', ' : ' ') : $last['year'].' ');
						break;
				}
			}
			return $range;
		}

		function get_week_label()
		{
			$first = $GLOBALS['phpgw']->datetime->gmtdate($GLOBALS['phpgw']->datetime->get_weekday_start($this->year, $this->month, $this->day));
			$last = $GLOBALS['phpgw']->datetime->gmtdate($first['raw'] + 518400);

			return ($this->long_date($first,$last));
		}

		function normalizeminutes(&$minutes)
		{
			$hour = 0;
			$min = (int)$minutes;
			if($min >= 60)
			{
				$hour += $min / 60;
				$min %= 60;
			}
			settype($minutes,'integer');
			$minutes = $min;
			return $hour;
		}

		function splittime($time,$follow_24_rule=True)
		{
			$temp = array('hour','minute','second','ampm');
			$time = strrev($time);
			$second = (int)(strrev(substr($time,0,2)));
			$minute = (int)(strrev(substr($time,2,2)));
			$hour   = (int)(strrev(substr($time,4)));
			$hour += $this->normalizeminutes($minute);
			$temp['second'] = $second;
			$temp['minute'] = $minute;
			$temp['hour']   = $hour;
			$temp['ampm']   = '  ';
			if($follow_24_rule == True)
			{
				if ($this->prefs['common']['timeformat'] == '24')
				{
					return $temp;
				}

				$temp['ampm'] = 'am';

				if ((int)$temp['hour'] > 12)
				{
					$temp['hour'] = (int)((int)$temp['hour'] - 12);
					$temp['ampm'] = 'pm';
				}
				elseif ((int)$temp['hour'] == 12)
				{
					$temp['ampm'] = 'pm';
				}
			}
			return $temp;
		}

		function get_exception_array($exception_str='')
		{
			$exception = Array();
			if(strpos(' '.$exception_str,','))
			{
				$exceptions = explode(',',$exception_str);
				for($exception_count=0;$exception_count<count($exceptions);$exception_count++)
				{
					$exception[] = (int)$exceptions[$exception_count];
				}
			}
			elseif($exception_str != '')
			{
				$exception[] = (int)$exception_str;
			}
			return $exception;
		}

		function build_time_for_display($fixed_time)
		{
			$time = $this->splittime($fixed_time);
			$str = $time['hour'].':'.((int)$time['minute']<=9?'0':'').$time['minute'];

			if ($this->prefs['common']['timeformat'] == '12')
			{
				$str .= ' ' . $time['ampm'];
			}

			return $str;
		}

		/**
		 * Inserts $event in $this->cached_events, if its not already there, because of a recur-expection
		 * Note: It maintains the sorting after starttime in the cached_events !!!
		 */
		function sort_event($event,$date)
		{
			$inserted = False;
			if(isset($event['recur_exception']))
			{
				$event_time = mktime($event['start']['hour'],$event['start']['min'],0,(int)(substr($date,4,2)),(int)(substr($date,6,2)),(int)(substr($date,0,4))) - $GLOBALS['phpgw']->datetime->tz_offset;
				while($inserted == False && list($key,$exception_time) = each($event['recur_exception']))
				{
					if($this->debug)
					{
						echo '<!-- checking exception datetime '.$exception_time.' to event datetime '.$event_time.' -->'."\n";
					}
					if($exception_time == $event_time)
					{
						$inserted = True;
					}
				}
			}
			if($this->cached_events[$date] && $inserted == False)
			{

				if($this->debug)
				{
					echo '<!-- Cached Events found for '.$date.' -->'."\n";
				}
				$year = substr($date,0,4);
				$month = substr($date,4,2);
				$day = substr($date,6,2);

				if($this->debug)
				{
					echo '<!-- Date : '.$date.' Count : '.count($this->cached_events[$date]).' -->'."\n";
				}

				for($i=0;$i<count($this->cached_events[$date]);$i++)
				{
					if($this->cached_events[$date][$i]['id'] == $event['id'] || $this->cached_events[$date][$i]['reference'] == $event['id'])
					{
						if($this->debug)
						{
							echo '<!-- Item already inserted! -->'."\n";
						}
						$inserted = True;
						break;
					}
					/* This puts all spanning events across multiple days up at the top. */
					if($this->cached_events[$date][$i]['recur_type'] == MCAL_RECUR_NONE)
					{
						if($this->cached_events[$date][$i]['start']['mday'] != $day && $this->cached_events[$date][$i]['end']['mday'] >= $day)
						{
							continue;
						}
					}
					if(date('Hi',mktime($event['start']['hour'],$event['start']['min'],$event['start']['sec'],$month,$day,$year)) < date('Hi',mktime($this->cached_events[$date][$i]['start']['hour'],$this->cached_events[$date][$i]['start']['min'],$this->cached_events[$date][$i]['start']['sec'],$month,$day,$year)))
					{
						for($j=count($this->cached_events[$date]);$j>=$i;$j--)
						{
							$this->cached_events[$date][$j] = $this->cached_events[$date][$j-1];
						}
						if($this->debug)
						{
							echo '<!-- Adding event ID: '.$event['id'].' to cached_events -->'."\n";
						}
						$inserted = True;
						$this->cached_events[$date][$i] = $event;
						break;
					}
				}
			}
			if(!$inserted)
			{
				if($this->debug)
				{
					echo '<!-- Adding event ID: '.$event['id'].' to cached_events -->'."\n";
				}
				$this->cached_events[$date][] = $event;
			}
		}

		/**
		 * Creates copies of each repeating event in $this->repeating_events in $this->cached_events (via sort_event)
		 */
		function check_repeating_events($datetime)
		{
			@reset($this->repeating_events);
			$search_date_full = date('Ymd',$datetime);
			$search_date_year = date('Y',$datetime);
			$search_date_month = date('m',$datetime);
			$search_date_day = date('d',$datetime);
			$search_date_dow = date('w',$datetime);
			$search_beg_day = mktime(0,0,0,$search_date_month,$search_date_day,$search_date_year,0);
			if($this->debug)
			{
				echo '<!-- Search Date Full = '.$search_date_full.' -->'."\n";
			}
			$repeated = $this->repeating_events;
			$r_events = count($repeated);
			for ($i=0;$i<$r_events;$i++)
			{
				$rep_events = $this->repeating_events[$i];
				$id = $rep_events['id'];
				$event_beg_day = mktime(0,0,0,$rep_events['start']['month'],$rep_events['start']['mday'],$rep_events['start']['year'],0);
				if($rep_events['recur_enddate']['month'] != 0 && $rep_events['recur_enddate']['mday'] != 0 && $rep_events['recur_enddate']['year'] != 0)
				{
					$event_recur_time = $this->maketime($rep_events['recur_enddate']);
				}
				else
				{
					$event_recur_time = mktime(0,0,0,1,1,2030);
				}
				$end_recur_date = date('Ymd',$event_recur_time);
				$full_event_date = date('Ymd',$event_beg_day);

				if($this->debug)
				{
					echo '<!-- check_repeating_events - Processing ID - '.$id.' -->'."\n";
					echo '<!-- check_repeating_events - Recurring End Date - '.$end_recur_date.' -->'."\n";
				}

				// only repeat after the beginning, and if there is an rpt_end before the end date
				if (($search_date_full > $end_recur_date) || ($search_date_full < $full_event_date))
				{
					continue;
				}

				if ($search_date_full == $full_event_date)
				{
					$this->sort_event($rep_events,$search_date_full);
					continue;
				}
				else
				{
					$freq = $rep_events['recur_interval'];
					$type = $rep_events['recur_type'];
					switch($type)
					{	// FIXME: need to add secondly, minutely, and hourly
						case MCAL_RECUR_DAILY:
							if($this->debug)
							{
								echo '<!-- check_repeating_events - MCAL_RECUR_DAILY - '.$id.' -->'."\n";
							}
							if ($freq == 1 && $rep_events['recur_enddate']['month'] != 0 && $rep_events['recur_enddate']['mday'] != 0 && $rep_events['recur_enddate']['year'] != 0 && $search_date_full <= $end_recur_date)
							{
								$this->sort_event($rep_events,$search_date_full);
							}
							elseif (floor(($search_beg_day - $event_beg_day)/86400) % $freq)
							{
								continue;
							}
							else
							{
								$this->sort_event($rep_events,$search_date_full);
							}
							break;
						case MCAL_RECUR_WEEKLY:
							if (floor(($search_beg_day - $event_beg_day)/604800) % $freq)
							{
								continue;
							}
							$check = 0;
							switch($search_date_dow)
							{
								case 0:
									$check = MCAL_M_SUNDAY;
									break;
								case 1:
									$check = MCAL_M_MONDAY;
									break;
								case 2:
									$check = MCAL_M_TUESDAY;
									break;
								case 3:
									$check = MCAL_M_WEDNESDAY;
									break;
								case 4:
									$check = MCAL_M_THURSDAY;
									break;
								case 5:
									$check = MCAL_M_FRIDAY;
									break;
								case 6:
									$check = MCAL_M_SATURDAY;
									break;
							}
							if ($rep_events['recur_data'] & $check)
							{
								$this->sort_event($rep_events,$search_date_full);
							}
							break;
						case MCAL_RECUR_MONTHLY_WDAY:
							if ((($search_date_year - $rep_events['start']['year']) * 12 + $search_date_month - $rep_events['start']['month']) % $freq)
							{
								continue;
							}

							if (($GLOBALS['phpgw']->datetime->day_of_week($rep_events['start']['year'],$rep_events['start']['month'],$rep_events['start']['mday']) == $GLOBALS['phpgw']->datetime->day_of_week($search_date_year,$search_date_month,$search_date_day)) &&
								(ceil($rep_events['start']['mday']/7) == ceil($search_date_day/7)))
							{
								$this->sort_event($rep_events,$search_date_full);
							}
							break;
						case MCAL_RECUR_MONTHLY_MDAY:
							if ((($search_date_year - $rep_events['start']['year']) * 12 + $search_date_month - $rep_events['start']['month']) % $freq)
							{
								continue;
							}
							if ($search_date_day == $rep_events['start']['mday'])
							{
								$this->sort_event($rep_events,$search_date_full);
							}
							break;
						case MCAL_RECUR_YEARLY:
							if (($search_date_year - $rep_events['start']['year']) % $freq)
							{
								continue;
							}
							if (date('dm',$datetime) == date('dm',$event_beg_day))
							{
								$this->sort_event($rep_events,$search_date_full);
							}
							break;
					}
				}
			}	// end for loop
		}	// end function

		function store_to_cache($params)
		{
			if(!is_array($params))
			{
				return False;
			}
			if (isset($params['start']) && ($datearr = $GLOBALS['server']->iso86012date($params['start'])))
			{
				$syear = $datearr['year'];
				$smonth = $datearr['month'];
				$sday = $datearr['mday'];
				$this->xmlrpc = True;
			}
			else
			{
				$syear = $params['syear'];
				$smonth = $params['smonth'];
				$sday = $params['sday'];
			}
			if (isset($params['end']) && ($datearr = $GLOBALS['server']->iso86012date($params['end'])))
			{
				$eyear = $datearr['year'];
				$emonth = $datearr['month'];
				$eday = $datearr['mday'];
				$this->xmlrpc = True;
			}
			else
			{
				$eyear = (isset($params['eyear'])?$params['eyear']:0);
				$emonth = (isset($params['emonth'])?$params['emonth']:0);
				$eday = (isset($params['eday'])?$params['eday']:0);
			}
			if (!isset($params['owner']) && @$this->xmlrpc)
			{
				$owner_id = $GLOBALS['phpgw_info']['user']['account_id'];
			}
			else
			{
				$owner_id = (isset($params['owner'])?$params['owner']:0);
				if($owner_id==0 && $this->is_group)
				{
					unset($owner_id);
					$owner_id = $this->g_owner;
					if($this->debug)
					{
						echo '<!-- owner_id in ('.implode(',',$owner_id).') -->'."\n";
					}
				}
			}

			if(!$eyear && !$emonth && !$eday)
			{
				$edate = mktime(23,59,59,$smonth + 1,$sday + 1,$syear);
				$eyear = date('Y',$edate);
				$emonth = date('m',$edate);
				$eday = date('d',$edate);
			}
			else
			{
				if(!$eyear)
				{
					$eyear = $syear;
				}
				if(!$emonth)
				{
					$emonth = $smonth + 1;
					if($emonth > 12)
					{
						$emonth = 1;
						$eyear++;
					}
				}
				if(!$eday)
				{
					$eday = $sday + 1;
				}
				$edate = mktime(23,59,59,$emonth,$eday,$eyear);
			}
			if (isset($params['modified']) && @$this->xmlrpc)
			{
				$params['modified'] = $GLOBALS['server']->iso86012date($params['modified'],true);
			}
			//echo "<p>bocalendar::store_to_cache(".print_r($params,True).") syear=$syear, smonth=$smonth, sday=$sday, eyear=$eyear, emonth=$emonth, eday=$eday, xmlrpc='$param[xmlrpc]'</p>\n";
			if($this->debug)
			{
				echo '<!-- Start Date : '.sprintf("%04d%02d%02d",$syear,$smonth,$sday).' -->'."\n";
				echo '<!-- End   Date : '.sprintf("%04d%02d%02d",$eyear,$emonth,$eday).' -->'."\n";
			}

			$cached_event_ids = $this->so->list_events($syear,$smonth,$sday,$eyear,$emonth,$eday,(int)$owner_id,(int)$params['modified']);
			$cached_event_ids_repeating = $this->so->list_repeated_events($syear,$smonth,$sday,$eyear,$emonth,$eday,(int)$owner_id,(int)$params['modified']);

			$c_cached_ids = count($cached_event_ids);
			$c_cached_ids_repeating = count($cached_event_ids_repeating);

			if($this->debug)
			{
				echo '<!-- events cached : '.$c_cached_ids.' : for : '.sprintf("%04d%02d%02d",$syear,$smonth,$sday).' -->'."\n";
				echo '<!-- repeating events cached : '.$c_cached_ids_repeating.' : for : '.sprintf("%04d%02d%02d",$syear,$smonth,$sday).' -->'."\n";
			}

			$this->cached_events = Array();

			if($c_cached_ids == 0 && $c_cached_ids_repeating == 0)
			{
				return;
			}

			$cache_start = (int)(sprintf("%04d%02d%02d",$syear,$smonth,$sday));
			$cached_event=$this->get_cached_event();
			if($c_cached_ids)
			{
				for($i=0;$i<$c_cached_ids;$i++)
				{
					$event = $this->so->read_entry($cached_event_ids[$i]);
					if ($event['recur_type'])
					{
						continue;	// fetch recuring events only in 2. loop
					}
					$startdate = (int)(date('Ymd',$this->maketime($event['start'])));
					// maketime($event['end'][)-1 to allow events to end on a full hour/day without the need to enter it as minute=59
					$enddate = (int)(date('Ymd',$this->maketime($event['end'])-1));
					$this->cached_events[$startdate][] = $event;
					if($startdate != $enddate)
					{
						$start['year'] = (int)(substr($startdate,0,4));
						$start['month'] = (int)(substr($startdate,4,2));
						$start['mday'] = (int)(substr($startdate,6,2));
						for($j=$startdate,$k=0;$j<=$enddate;$k++,$j=(int)(date('Ymd',mktime(0,0,0,$start['month'],$start['mday'] + $k,$start['year']))))
						{
							$c_evt_day = count($this->cached_events[$j]) - 1;
							if($c_evt_day < 0)
							{
								$c_evt_day = 0;
							}
							if($this->debug)
							{
								echo '<!-- Date: '.$j.' Count : '.$c_evt_day.' -->'."\n";
							}
							if($this->cached_events[$j][$c_evt_day]['id'] != $event['id'])
							{
								if($this->debug)
								{
									echo '<!-- Adding Event for Date: '.$j.' -->'."\n";
								}
								$this->cached_events[$j][] = $event;
							}
							if ($j >= $cache_start && (@$params['no_doubles'] || @$this->xmlrpc))
							{
								break;	// add event only once on it's startdate
							}
						}
					}
				}
			}
			
			$this->repeating_events = Array();
			if($c_cached_ids_repeating)
			{
				for($i=0;$i<$c_cached_ids_repeating;$i++)
				{
					$this->repeating_events[$i] = $this->so->read_entry($cached_event_ids_repeating[$i]);
					if($this->debug)
					{
						echo '<!-- Cached Events ID: '.$cached_event_ids_repeating[$i].' ('.sprintf("%04d%02d%02d",$this->repeating_events[$i]['start']['year'],$this->repeating_events[$i]['start']['month'],$this->repeating_events[$i]['start']['mday']).') -->'."\n";
					}
				}
				for($date=mktime(0,0,0,$smonth,$sday,$syear);$date<=$edate;$date += 86400)
				{
					if($this->debug)
					{
						$search_date = date('Ymd',$date);
						echo '<!-- Calling check_repeating_events('.$search_date.') -->'."\n";
					}
					$this->check_repeating_events($date);
					if($this->debug)
					{
						echo '<!-- Total events found matching '.$search_date.' = '.count($this->cached_events[$search_date]).' -->'."\n";
						for($i=0;$i<count($this->cached_events[$search_date]);$i++)
						{
							echo '<!-- Date: '.$search_date.' ['.$i.'] = '.$this->cached_events[$search_date][$i]['id'].' -->'."\n";
						}
					}
				}
			}

			$retval = Array();
			for($j=date('Ymd',mktime(0,0,0,$smonth,$sday,$syear)),$k=0;$j<=date('Ymd',mktime(0,0,0,$emonth,$eday,$eyear));$k++,$j=date('Ymd',mktime(0,0,0,$smonth,$sday + $k,$syear)))
			{
				if(is_array($this->cached_events[$j]))
				{
					if ($this->xmlrpc)
					{
						foreach($this->cached_events[$j] as $event)
						{
							$retval[] = $this->xmlrpc_prepare($event);
						}
					}
					else
					{
						$retval[$j] = $this->cached_events[$j];
					}
				}
			}
			//echo "store_to_cache(".print_r($params,True).")=<pre>".print_r($retval,True)."</pre>\n";
			$this->so->cal->event = $cached_event;
			return $retval;
		}

		function xmlrpc_prepare(&$event)
		{
			$event['rights'] = $this->grants[$event['owner']];

			foreach(array('start','end','modtime','recur_enddate') as $name)
			{
				if (isset($event[$name]))
				{
					$event[$name] = $GLOBALS['server']->date2iso8601($event[$name]);
				}
			}
			if (is_array($event['recur_exception']))
			{
				foreach($event['recur_exception'] as $key => $timestamp)
				{
					$event['recur_exception'][$key] = $GLOBALS['server']->date2iso8601($timestamp);
				}
			}
			static $user_cache = array();

			if (!is_object($GLOBALS['phpgw']->perferences))
			{
				$GLOBALS['phpgw']->perferences = CreateObject('phpgwapi.preferences');
			}
			foreach($event['participants'] as $user_id => $status)
			{
				if (!isset($user_cache[$user_id]))
				{
					$user_cache[$user_id] = array(
						'name'   => $GLOBALS['phpgw']->common->grab_owner_name($user_id),
						'email'  => $GLOBALS['phpgw']->accounts->id2name($user_id,'account_email')
					);
				}
				$event['participants'][$user_id] = $user_cache[$user_id] + array(
					'status' => $status,
				);
			}
			if (is_array($event['alarm']))
			{
				foreach($event['alarm'] as $id => $alarm)
				{
					$event['alarm'][$id]['time'] = $GLOBALS['server']->date2iso8601($alarm['time']);
					if ($alarm['owner'] != $GLOBALS['phpgw_info']['user']['account_id'])
					{
						unset($event['alarm'][$id]);
					}
				}
			}
			$event['category'] = $GLOBALS['server']->cats2xmlrpc(explode(',',$event['category']));

			// using access={public|privat} in all modules via xmlrpc
			$event['access'] = $event['public'] ? 'public' : 'privat';
			unset($event['public']);

			return $event;
		}

		/* Begin Appsession Data */
		function store_to_appsession($event)
		{
			$GLOBALS['phpgw']->session->appsession('entry','calendar',$event);
		}

		function restore_from_appsession()
		{
			$this->event_init();
			$event = $GLOBALS['phpgw']->session->appsession('entry','calendar');
			$this->so->cal->event = $event;
			return $event;
		}
		/* End Appsession Data */

		/* Begin of SO functions */
		function get_cached_event()
		{
			return $this->so->get_cached_event();
		}

		function add_attribute($var,$value,$index='**(**')
		{
			$this->so->add_attribute($var,$value,$index);
		}

		function event_init()
		{
			$this->so->event_init();
		}

		function set_start($year,$month,$day=0,$hour=0,$min=0,$sec=0)
		{
			$this->so->set_start($year,$month,$day,$hour,$min,$sec);
		}

		function set_end($year,$month,$day=0,$hour=0,$min=0,$sec=0)
		{
			$this->so->set_end($year,$month,$day,$hour,$min,$sec);
		}

		function set_title($title='')
		{
			$this->so->set_title($title);
		}

		function set_description($description='')
		{
			$this->so->set_description($description);
		}

		function set_class($class)
		{
			$this->so->set_class($class);
		}

		function set_category($category='')
		{
			$this->so->set_category($category);
		}

		function set_alarm($alarm)
		{
			$this->so->set_alarm($alarm);
		}

		function set_recur_none()
		{
			$this->so->set_recur_none();
		}

		function set_recur_daily($year,$month,$day,$interval)
		{
			$this->so->set_recur_daily($year,$month,$day,$interval);
		}

		function set_recur_weekly($year,$month,$day,$interval,$weekdays)
		{
			$this->so->set_recur_weekly($year,$month,$day,$interval,$weekdays);
		}

		function set_recur_monthly_mday($year,$month,$day,$interval)
		{
			$this->so->set_recur_monthly_mday($year,$month,$day,$interval);
		}

		function set_recur_monthly_wday($year,$month,$day,$interval)
		{
			$this->so->set_recur_monthly_wday($year,$month,$day,$interval);
		}

		function set_recur_yearly($year,$month,$day,$interval)
		{
			$this->so->set_recur_yearly($year,$month,$day,$interval);
		}
		/* End of SO functions */

		function prepare_matrix($interval,$increment,$part,$fulldate)
		{
			for($h=0;$h<24;$h++)
			{
				for($m=0;$m<$interval;$m++)
				{
					$index = (($h * 10000) + (($m * $increment) * 100));
					$time_slice[$index]['marker'] = '&nbsp';
					$time_slice[$index]['description'] = '';
				}
			}
			foreach($this->cached_events[$fulldate] as $event)
			{
				if ($event['participants'][$part] == 'R')
				{
					continue;	// dont show rejected invitations, as they are free time
				}
				$eventstart = $GLOBALS['phpgw']->datetime->localdates($this->maketime($event['start']) - $GLOBALS['phpgw']->datetime->tz_offset);
				$eventend = $GLOBALS['phpgw']->datetime->localdates($this->maketime($event['end']) - $GLOBALS['phpgw']->datetime->tz_offset);
				$start = ($eventstart['hour'] * 10000) + ($eventstart['minute'] * 100);
				$starttemp = $this->splittime("$start",False);
				$subminute = 0;
				for($m=0;$m<$interval;$m++)
				{
					$minutes = $increment * $m;
					if((int)$starttemp['minute'] > $minutes && (int)$starttemp['minute'] < ($minutes + $increment))
					{
						$subminute = ($starttemp['minute'] - $minutes) * 100;
					}
				}
				$start -= $subminute;
				$end =  ($eventend['hour'] * 10000) + ($eventend['minute'] * 100);
				$endtemp = $this->splittime("$end",False);
				$addminute = 0;
				for($m=0;$m<$interval;$m++)
				{
					$minutes = ($increment * $m);
					if($endtemp['minute'] < ($minutes + $increment) && $endtemp['minute'] > $minutes)
					{
						$addminute = ($minutes + $increment - $endtemp['minute']) * 100;
					}
				}
				$end += $addminute;
				$starttemp = $this->splittime("$start",False);
				$endtemp = $this->splittime("$end",False);

				for($h=$starttemp['hour'];$h<=$endtemp['hour'];$h++)
				{
					$startminute = 0;
					$endminute = $interval;
					$hour = $h * 10000;
					if($h == (int)$starttemp['hour'])
					{
						$startminute = ($starttemp['minute'] / $increment);
					}
					if($h == (int)$endtemp['hour'])
					{
						$endminute = ($endtemp['minute'] / $increment);
					}
					$private = $this->is_private($event,$part);
					$time_display = $GLOBALS['phpgw']->common->show_date($eventstart['raw'],$this->users_timeformat).'-'.$GLOBALS['phpgw']->common->show_date($eventend['raw'],$this->users_timeformat);
					$time_description = '('.$time_display.') '.$this->get_short_field($event,$private,'title').$this->display_status($event['participants'][$part]);
					for($m=$startminute;$m<$endminute;$m++)
					{
						$index = ($hour + (($m * $increment) * 100));
						$time_slice[$index]['marker'] = '-';
						$time_slice[$index]['description'] = $time_description;
						$time_slice[$index]['id'] = $event['id'];
					}
				}
			}
			return $time_slice;
		}

		/*!
		@function set_status
		@abstract set the participant response $status for event $cal_id and notifies the owner of the event
		*/
		function set_status($cal_id,$status)
		{
			$status2msg = array(
				REJECTED  => MSG_REJECTED,
				TENTATIVE => MSG_TENTATIVE,
				ACCEPTED  => MSG_ACCEPTED
			);
			if (!isset($status2msg[$status]))
			{
				return False;
			}
			$this->so->set_status($cal_id,$status);
			$event = $this->so->read_entry($cal_id);
			$this->send_update($status2msg[$status],$event['participants'],$event);

			return True;
		}

		/*!
		@function update_requested
		@abstract checks if $userid has requested (in $part_prefs) updates for $msg_type
		@syntax update_requested($userid,$part_prefs,$msg_type,$old_event,$new_event)
		@param $userid numerical user-id
		@param $part_prefs preferces of the user $userid
		@param $msg_type type of the notification: MSG_ADDED, MSG_MODIFIED, MSG_ACCEPTED, ...
		@param $old_event Event before the change
		@param $new_event Event after the change
		@returns 0 = no update requested, > 0 update requested
		*/
		function update_requested($userid,$part_prefs,$msg_type,$old_event,$new_event)
		{
			if ($msg_type == MSG_ALARM)
			{
				return True;	// always True for now
			}
			$want_update = 0;

			// the following switch fall-through all cases, as each included the following too
			//
			$msg_is_response = $msg_type == MSG_REJECTED || $msg_type == MSG_ACCEPTED || $msg_type == MSG_TENTATIVE;

			switch($ru = $part_prefs['calendar']['receive_updates'])
			{
				case 'responses':
					if ($msg_is_response)
					{
						++$want_update;
					}
				case 'modifications':
					if ($msg_type == MSG_MODIFIED)
					{
						++$want_update;
					}
				case 'time_change_4h':
				case 'time_change':
					$diff = max(abs($this->maketime($old_event['start'])-$this->maketime($new_event['start'])),
						abs($this->maketime($old_event['end'])-$this->maketime($new_event['end'])));
					$check = $ru == 'time_change_4h' ? 4 * 60 * 60 - 1 : 0;
					if ($msg_type == MSG_MODIFIED && $diff > $check)
					{
						++$want_update;
					}
				case 'add_cancel':
					if ($old_event['owner'] == $userid && $msg_is_response ||
						$msg_type == MSG_DELETED || $msg_type == MSG_ADDED)
					{
						++$want_update;
					}
					break;
				case 'no':
					break;
			}
			//echo "<p>bocalendar::update_requested(user=$userid,pref=".$part_prefs['calendar']['receive_updates'] .",msg_type=$msg_type,".($old_event?$old_event['title']:'False').",".($old_event?$old_event['title']:'False').") = $want_update</p>\n";
			return $want_update > 0;
		}

		/*!
		@function send_update
		@abstract sends update-messages to certain participants of an event
		@syntax send_update($msg_type,$to_notify,$old_event,$new_event=False)
		@param $msg_type type of the notification: MSG_ADDED, MSG_MODIFIED, MSG_ACCEPTED, ...
		@param $to_notify array with numerical user-ids as keys (!) (value is not used)
		@param $old_event Event before the change
		@param $new_event Event after the change
		*/
		function send_update($msg_type,$to_notify,$old_event,$new_event=False,$user=False)
		{
			print_debug('bocalendar::send_update()');
			print_debug('type',$msg_type);
			print_debug('to_notify',$to_notify);
			print_debug('old_event',$old_event);
			print_debug('new_event',$new_event);
			print_debug('user',$user);

			if (!is_array($to_notify))
			{
				$to_notify = array();
			}
			$owner = $old_event ? $old_event['owner'] : $new_event['owner'];
			if ($owner && !isset($to_notify[$owner]) && $msg_type != MSG_ALARM)
			{
				$to_notify[$owner] = 'owner';	// always include the event-owner
			}
			$version = $GLOBALS['phpgw_info']['apps']['calendar']['version'];

			$sender = $GLOBALS['phpgw_info']['user']['email'];

			$temp_tz_offset = $this->prefs['common']['tz_offset'];
			$temp_timeformat = $this->prefs['common']['timeformat'];
			$temp_dateformat = $this->prefs['common']['dateformat'];

			$tz_offset = ((60 * 60) * (int)$temp_tz_offset);

			if($old_event != False)
			{
				$t_old_start_time = $this->maketime($old_event['start']);
				if($t_old_start_time < (time() - 86400))
				{
					return False;
				}
			}

			$temp_user = $GLOBALS['phpgw_info']['user'];

			if (!$user)
			{
				$user = $this->owner;
			}
			if ($GLOBALS['phpgw']->preferences->account_id != $user)
			{
				$GLOBALS['phpgw']->preferences->preferences($user);
				$GLOBALS['phpgw_info']['user']['preferences'] = $GLOBALS['phpgw']->preferences->read_repository();
			}

			$event = $msg_type == MSG_ADDED || $msg_type == MSG_MODIFIED ? $new_event : $old_event;
			if($old_event != False)
			{
				$old_starttime = $t_old_start_time - $GLOBALS['phpgw']->datetime->tz_offset;
			}
			$starttime = $this->maketime($event['start']) - $GLOBALS['phpgw']->datetime->tz_offset;
			$endtime   = $this->maketime($event['end']) - $GLOBALS['phpgw']->datetime->tz_offset;

			switch($msg_type)
			{
				case MSG_DELETED:
					$action = lang('Canceled');
					$msg = 'Canceled';
					$msgtype = '"calendar";';
					$method = 'cancel';
					break;
				case MSG_MODIFIED:
					$action = lang('Modified');
					$msg = 'Modified';
					$msgtype = '"calendar"; Version="'.$version.'"; Id="'.$new_event['id'].'"';
					$method = 'request';
					break;
				case MSG_ADDED:
					$action = lang('Added');
					$msg = 'Added';
					$msgtype = '"calendar"; Version="'.$version.'"; Id="'.$new_event['id'].'"';
					$method = 'request';
					break;
				case MSG_REJECTED:
					$action = lang('Rejected');
					$msg = 'Response';
					$msgtype = '"calendar";';
					$method = 'reply';
					break;
				case MSG_TENTATIVE:
					$action = lang('Tentative');
					$msg = 'Response';
					$msgtype = '"calendar";';
					$method = 'reply';
					break;
				case MSG_ACCEPTED:
					$action = lang('Accepted');
					$msg = 'Response';
					$msgtype = '"calendar";';
					$method = 'reply';
					break;
				case MSG_ALARM:
					$action = lang('Alarm');
					$msg = 'Alarm';
					$msgtype = '"calendar";';
					$method = 'publish';	// duno if thats right
					break;
				default:
					$method = 'publish';
			}
			$notify_msg = $this->prefs['calendar']['notify'.$msg];
			if (empty($notify_msg))
			{
				$notify_msg = $this->prefs['calendar']['notifyAdded'];	// use a default
			}
			$details = array(			// event-details for the notify-msg
				'id'          => $msg_type == MSG_ADDED ? $new_event['id'] : $old_event['id'],
				'action'      => $action,
			);
			$event_arr = $this->event2array($event);
			foreach($event_arr as $key => $val)
			{
				$details[$key] = $val['data'];
			}
			$details['participants'] = $details['participants'] ? implode("\n",$details['participants']) : '';

			$details['link'] = $GLOBALS['phpgw_info']['server']['webserver_url'].'/index.php?menuaction=calendar.uicalendar.view&cal_id='.$event['id'];
			// if url is only a path, try guessing the rest ;-)
			if ($GLOBALS['phpgw_info']['server']['webserver_url'][0] == '/')
			{
				$details['link'] = ($GLOBALS['phpgw_info']['server']['enforce_ssl'] || $_SERVER['HTTPS'] ? 'https://' : 'http://').
					($GLOBALS['phpgw_info']['server']['hostname'] ? $GLOBALS['phpgw_info']['server']['hostname'] : 'localhost').
					$details['link'];
			}

			if(!is_object($GLOBALS['phpgw']->send))
			{
				$GLOBALS['phpgw']->send = CreateObject('phpgwapi.send');
			}
			$send = &$GLOBALS['phpgw']->send;

			foreach($to_notify as $userid => $statusid)
			{
				$userid = (int)$userid;

				if ($statusid == 'R' || $GLOBALS['phpgw']->accounts->get_type($userid) == 'g')
				{
					continue;	// dont notify rejected participants or groups
				}
				if($userid != $GLOBALS['phpgw_info']['user']['account_id'] ||  $msg_type == MSG_ALARM)
				{
					print_debug('Msg Type',$msg_type);
					print_debug('UserID',$userid);

					$preferences = CreateObject('phpgwapi.preferences',$userid);
					$part_prefs = $preferences->read_repository();

					if (!$this->update_requested($userid,$part_prefs,$msg_type,$old_event,$new_event))
					{
						continue;
					}
					$GLOBALS['phpgw']->accounts->get_account_name($userid,$lid,$details['to-firstname'],$details['to-lastname']);
					$details['to-fullname'] = $GLOBALS['phpgw']->common->display_fullname('',$details['to-firstname'],$details['to-lastname']);

					$to = $GLOBALS['phpgw']->accounts->id2name($userid,'account_email');

					$GLOBALS['phpgw_info']['user']['preferences']['common']['tz_offset'] = $part_prefs['common']['tz_offset'];
					$GLOBALS['phpgw_info']['user']['preferences']['common']['timeformat'] = $part_prefs['common']['timeformat'];
					$GLOBALS['phpgw_info']['user']['preferences']['common']['dateformat'] = $part_prefs['common']['dateformat'];

					$GLOBALS['phpgw']->datetime->tz_offset = ((60 * 60) * (int)$GLOBALS['phpgw_info']['user']['preferences']['common']['tz_offset']);

					if($old_starttime)
					{
						$details['olddate'] = $GLOBALS['phpgw']->common->show_date($old_starttime);
					}
					$details['startdate'] = $GLOBALS['phpgw']->common->show_date($starttime);
					$details['enddate']   = $GLOBALS['phpgw']->common->show_date($endtime);

					list($subject,$body) = split("\n",$GLOBALS['phpgw']->preferences->parse_notify($notify_msg,$details),2);
					$subject = $send->encode_subject($subject);

					switch($part_prefs['calendar']['update_format'])
 					{
						case  'extended':
							$body .= "\n\n".lang('Event Details follow').":\n";
							foreach($event_arr as $key => $val)
							{
								if ($key != 'access' && $key != 'priority' && strlen($details[$key]))
								{
									$body .= sprintf("%-20s %s\n",$val['field'].':',$details[$key]);
								}
							}
							$send->ClearAddresses();
							$send->ClearAttachments();
							$send->IsHTML(False);
							$send->AddAddress($to);
							$send->Body = $body;
							$send->From = $sender;
							$send->FromName = $GLOBALS['phpgw_info']['user']['fullname'];
							$send->Subject = $subject;
							$returncode = $send->Send();
							break;

						case  'ical':
							$ics = ExecMethod('calendar.boicalendar.export',array(
								'l_event_id'  => $event['id'],
								'method'      => $method,
								'chunk_split' => False
							));
							$send->ClearAddresses();
							$send->ClearAttachments();
							$send->IsHTML(False);
							$send->AddAddress($to);
							$send->Body = $body;
						        if ($method == "request") {
                                                            $send->AddStringAttachment($ics, "cal.ics", "8bit", "text/calendar; method=$method");
                                                        }
							$send->From = $sender;
							$send->FromName = $GLOBALS['phpgw_info']['user']['fullname'];
							$send->Subject = $subject;
							$returncode = $send->Send();
							break;
					}
					print_debug('update_format',$part_prefs['calendar']['update_format']);
					print_debug('to',$to);
					print_debug('sender',$sender);
					print_debug('subject',$subject);
					print_debug('returncode',$returncode);
					print_debug('body',$body);
				}
			}
			unset($send);

			if((is_int($this->user) && $this->user != $temp_user['account_id']) ||
				(is_string($this->user) && $this->user != $temp_user['account_lid']))
			{
				$GLOBALS['phpgw_info']['user'] = $temp_user;
			}

			$GLOBALS['phpgw_info']['user']['preferences']['common']['tz_offset'] = $temp_tz_offset;
			$GLOBALS['phpgw']->datetime->tz_offset = ((60 * 60) * $temp_tz_offset);
			$GLOBALS['phpgw_info']['user']['preferences']['common']['timeformat'] = $temp_timeformat;
			$GLOBALS['phpgw_info']['user']['preferences']['common']['dateformat'] = $temp_dateformat;

			return $returncode;
		}

		function send_alarm($alarm)
		{
			//echo "<p>bocalendar::send_alarm("; print_r($alarm); echo ")</p>\n";
			$GLOBALS['phpgw_info']['user']['account_id'] = $this->owner = $alarm['owner'];

			if (!$alarm['enabled'] || !$alarm['owner'] || !$alarm['cal_id'] || !($event = $this->so->read_entry($alarm['cal_id'])))
			{
				return False;	// event not found
			}
			if ($alarm['all'])
			{
				$to_notify = $event['participants'];
			}
			elseif ($this->check_perms(PHPGW_ACL_READ,$event))	// checks agains $this->owner set to $alarm[owner]
			{
				$to_notify[$alarm['owner']] = 'A';
			}
			else
			{
				return False;	// no rights
			}
			return $this->send_update(MSG_ALARM,$to_notify,$event,False,$alarm['owner']);
		}

		function get_alarms($event_id)
		{
			return $this->so->get_alarm($event_id);
		}

		function alarm_today($event,$today,$starttime)
		{
			$found = False;
			@reset($event['alarm']);
			$starttime_hi = $GLOBALS['phpgw']->common->show_date($starttime,'Hi');
			$t_appt['month'] =$GLOBALS['phpgw']->common->show_date($today,'m');
			$t_appt['mday'] = $GLOBALS['phpgw']->common->show_date($today,'d');
			$t_appt['year'] = $GLOBALS['phpgw']->common->show_date($today,'Y');
			$t_appt['hour'] = $GLOBALS['phpgw']->common->show_date($starttime,'H');
			$t_appt['min']  = $GLOBALS['phpgw']->common->show_date($starttime,'i');
			$t_appt['sec']  = 0;
			$t_time = $this->maketime($t_appt) - $GLOBALS['phpgw']->datetime->tz_offset;
			$y_time = $t_time - 86400;
			$tt_time = $t_time + 86399;
			print_debug('T_TIME',$t_time.' : '.$GLOBALS['phpgw']->common->show_date($t_time));
			print_debug('Y_TIME',$y_time.' : '.$GLOBALS['phpgw']->common->show_date($y_time));
			print_debug('TT_TIME',$tt_time.' : '.$GLOBALS['phpgw']->common->show_date($tt_time));
			while(list($key,$alarm) = each($event['alarm']))
			{
				if($alarm['enabled'])
				{
					print_debug('TIME',$alarm['time'].' : '.$GLOBALS['phpgw']->common->show_date($alarm['time']).' ('.$event['id'].')');
					if($event['recur_type'] != MCAL_RECUR_NONE)   /* Recurring Event */
					{
						print_debug('Recurring Event');
						if($alarm['time'] > $y_time && $GLOBALS['phpgw']->common->show_date($alarm['time'],'Hi') < $starttime_hi && $alarm['time'] < $t_time)
						{
							$found = True;
						}
					}
					elseif($alarm['time'] > $y_time && $alarm['time'] < $t_time)
					{
						$found = True;
					}
				}
			}
			print_debug('Found',$found);
			return $found;
		}

		function prepare_recipients(&$new_event,$old_event)
		{
			// Find modified and deleted users.....
			while(list($old_userid,$old_status) = each($old_event['participants']))
			{
				if(isset($new_event['participants'][$old_userid]))
				{
					print_debug('Modifying event for user',$old_userid);
					$this->modified[(int)$old_userid] = $new_status;
				}
				else
				{
					print_debug('Deleting user from the event',$old_userid);
					$this->deleted[(int)$old_userid] = $old_status;
				}
			}
			// Find new users.....
			while(list($new_userid,$new_status) = each($new_event['participants']))
			{
				if(!isset($old_event['participants'][$new_userid]))
				{
					print_debug('Adding event for user',$new_userid);
					$this->added[$new_userid] = 'U';
					$new_event['participants'][$new_userid] = 'U';
				}
			}

			if(count($this->added) > 0 || count($this->modified) > 0 || count($this->deleted) > 0)
			{
				if(count($this->added) > 0)
				{
					$this->send_update(MSG_ADDED,$this->added,'',$new_event);
				}
				if(count($this->modified) > 0)
				{
					$this->send_update(MSG_MODIFIED,$this->modified,$old_event,$new_event);
				}
				if(count($this->deleted) > 0)
				{
					$this->send_update(MSG_DELETED,$this->deleted,$old_event);
				}
			}
		}

		function remove_doubles_in_cache($firstday,$lastday)
		{
			$already_moved = Array();
			for($v=$firstday;$v<=$lastday;$v++)
			{
				if (!$this->cached_events[$v])
				{
					continue;
				}
				$cached = $this->cached_events[$v];
				$this->cached_events[$v] = array();
				while (list($g,$event) = each($cached))
				{
					$end = date('Ymd',$this->maketime($event['end']));
					print_debug('EVENT',_debug_array($event,False));
					print_debug('start',$start);
					print_debug('v',$v);

					if (!isset($already_moved[$event['id']]) || $event['recur_type'] && $v > $end)
					{
						$this->cached_events[$v][] = $event;
						$already_moved[$event['id']] = 1;
						print_debug('Event moved');
					}
				}
			}
		}

		function get_dirty_entries($lastmod=-1)
		{
			$events = false;
			$event_ids = $this->so->cal->list_dirty_events($lastmod);
			if(is_array($event_ids))
			{
				foreach($event_ids as $key => $id)
				{
					$events[$id] = $this->so->cal->fetch_event($id);
				}
			}
			unset($event_ids);

			$rep_event_ids = $this->so->cal->list_dirty_events($lastmod,$true);
			if(is_array($rep_event_ids))
			{
				foreach($rep_event_ids as $key => $id)
				{
					$events[$id] = $this->so->cal->fetch_event($id);
				}
			}
			unset($rep_event_ids);

			return $events;
		}

		function _debug_array($data)
		{
			echo '<br>UI:';
			_debug_array($data);
		}

		/*!
		@function rejected_no_show
		@abstract checks if event is rejected from user and he's not the owner and dont want rejected
		@param $event to check
		@returns True if event should not be shown
		*/
		function rejected_no_show($event)
		{
			$ret = !$this->prefs['calendar']['show_rejected'] &&
				$event['owner'] != $this->owner &&
				$event['participants'][$this->owner] == 'R';
			//echo "<p>rejected_no_show($event[title])='$ret': user=$this->owner, event-owner=$event[owner], status='".$event['participants'][$this->owner]."', show_rejected='".$this->prefs['calendar']['show_rejected']."'</p>\n";
			return $ret;
		}

		/* This is called only by list_cals().  It was moved here to remove fatal error in php5 beta4 */
		function list_cals_add($id,&$users,&$groups)
		{
			$name = $GLOBALS['phpgw']->common->grab_owner_name($id);
			if (($type = $GLOBALS['phpgw']->accounts->get_type($id)) == 'g')
			{
				$arr = &$groups;
			}
			else
			{
				$arr = &$users;
			}
			$arr[$name] = Array(
				'grantor' => $id,
				'value'   => ($type == 'g' ? 'g_' : '') . $id,
				'name'    => $name
			);
		}

		/*!
		@function list_cals
		@abstract generate list of user- / group-calendars for the selectbox in the header
		@returns alphabeticaly sorted array with groups first and then users
		*/
		function list_cals()
		{
			$users = $groups = array();
			foreach($this->grants as $id => $rights)
			{
				$this->list_cals_add($id,$users,$groups);
			}
			if ($memberships = $GLOBALS['phpgw']->accounts->membership($GLOBALS['phpgw_info']['user']['account_id']))
			{
				foreach($memberships as $group_info)
				{
					$this->list_cals_add($group_info['account_id'],$users,$groups);

					if ($account_perms = $GLOBALS['phpgw']->acl->get_ids_for_location($group_info['account_id'],PHPGW_ACL_READ,'calendar'))
					{
						foreach($account_perms as $id)
						{
							$this->list_cals_add($id,$users,$groups);
						}
					}
				}
			}
			uksort($users,'strnatcasecmp');
			uksort($groups,'strnatcasecmp');

			return $users + $groups;	// users first and then groups, both alphabeticaly
		}

		/*!
		@function event2array
		@abstract create array with name, translated name and readable content of each attributes of an event
		@syntax event2array($event,$sep='<br>')
		@param $event event to use
		@returns array of attributes with fieldname as key and array with the 'field'=translated name \
			'data' = readable content (for participants this is an array !)
		*/
		function event2array($event)
		{
			$ownerApps = $GLOBALS['phpgw']->acl->get_user_applications($event['owner']);

			$var['title'] = Array(
				'field'		=> lang('Title'),
				'data'		=> $event['title']
			);

			// Some browser add a \n when its entered in the database. Not a big deal
			// this will be printed even though its not needed.
			$var['description'] = Array(
				'field'	=> lang('Description'),
				'data'	=> $event['description']
			);

			$cats = Array();
			$this->cat->categories($this->bo->owner,'calendar');
			if(strpos($event['category'],','))
			{
				$cats = explode(',',$event['category']);
			}
			else
			{
				$cats[] = $event['category'];
			}
			foreach($cats as $cat_id)
			{
				list($cat) = $this->cat->return_single($cat_id);
				$cat_string[] = stripslashes($cat['name']);
			}
			$var['category'] = Array(
				'field'	=> lang('Category'),
				'data'	=> implode(', ',$cat_string)
			);

			$var['location'] = Array(
				'field'	=> lang('Location'),
				'data'	=> $event['location']
			);

			$var['startdate'] = Array(
				'field'	=> lang('Start Date/Time'),
				'data'	=> $GLOBALS['phpgw']->common->show_date($this->maketime($event['start']) - $GLOBALS['phpgw']->datetime->tz_offset),
			);

			$var['enddate'] = Array(
				'field'	=> lang('End Date/Time'),
				'data'	=> $GLOBALS['phpgw']->common->show_date($this->maketime($event['end']) - $GLOBALS['phpgw']->datetime->tz_offset)
			);

			$pri = Array(
				1	=> lang('Low'),
				2	=> lang('Normal'),
				3	=> lang('High')
			);
			$var['priority'] = Array(
				'field'	=> lang('Priority'),
				'data'	=> $pri[$event['priority']]
			);

			$var['owner'] = Array(
				'field'	=> lang('Created By'),
				'data'	=> $GLOBALS['phpgw']->common->grab_owner_name($event['owner'])
			);

			$var['updated'] = Array(
				'field'	=> lang('Updated'),
				'data'	=> $GLOBALS['phpgw']->common->show_date($this->maketime($event['modtime']))
			);

			$var['access'] = Array(
				'field'	=> lang('Access'),
				'data'	=> $event['public'] ? lang('Public') : lang('Private')
			);

			if($ownerApps['projects'] && $event['projectID'])
			{
				$boprojects = createObject('projects.boprojects');
				$projectData = $boprojects->read_single_project($event['projectID']);
				$var['project'] = Array
				(
					'field' => lang('Project'),
					'data'  => $projectData['title'].'&nbsp;['.$projectData['number'].']'
				);
			}
			if(@isset($event['groups'][0]))
			{
				$cal_grps = '';
				for($i=0;$i<count($event['groups']);$i++)
				{
					if($GLOBALS['phpgw']->accounts->exists($event['groups'][$i]))
					{
						$cal_grps .= ($i>0?'<br>':'').$GLOBALS['phpgw']->accounts->id2name($event['groups'][$i]);
					}
				}

				$var['groups'] = Array(
					'field'	=> lang('Groups'),
					'data'	=> $cal_grps
				);
			}

			if (isset($event['participants']) && is_array($event['participants']))
			{
				$participants = array();
				foreach($event['participants'] as $user => $short_status)
				{
					if($GLOBALS['phpgw']->accounts->exists($user))
					{
						$participants[$user] = $GLOBALS['phpgw']->common->grab_owner_name($user).' ('.$this->get_long_status($short_status).')';
					}
				}
			}
			$var['participants'] = Array(
				'field'	=> lang('Participants'),
				'data'	=> $participants
			);

			// Repeated Events
			if($event['recur_type'] != MCAL_RECUR_NONE)
			{
				$str = lang($this->rpt_type[$event['recur_type']]);

				$str_extra = array();
				if ($event['recur_enddate']['mday'] != 0 && $event['recur_enddate']['month'] != 0 && $event['recur_enddate']['year'] != 0)
				{
					$recur_end = $this->maketime($event['recur_enddate']);
					if($recur_end != 0)
					{
						$recur_end -= $GLOBALS['phpgw']->datetime->tz_offset;
						$str_extra[] = lang('ends').': '.lang($GLOBALS['phpgw']->common->show_date($recur_end,'l')).', '.$this->long_date($recur_end).' ';
					}
				}
				// only weekly uses the recur-data (days) !!!
				if($event['recur_type'] == MCAL_RECUR_WEEKLY)
				{
					$repeat_days = array();
					foreach ($this->rpt_day as $mcal_mask => $dayname)
					{
						if ($event['recur_data'] & $mcal_mask)
						{
							$repeat_days[] = lang($dayname);
						}
					}
					if(count($repeat_days))
					{
						$str_extra[] = lang('days repeated').': '.implode(', ',$repeat_days);
					}
				}
				if($event['recur_interval'] != 0)
				{
					$str_extra[] = lang('Interval').': '.$event['recur_interval'];
				}

				if(count($str_extra))
				{
					$str .= ' ('.implode(', ',$str_extra).')';
				}

				$var['recur_type'] = Array(
					'field'	=> lang('Repetition'),
					'data'	=> $str,
				);
			}

			if (!isset($this->fields))
			{
				$this->custom_fields = CreateObject('calendar.bocustom_fields');
				$this->fields = &$this->custom_fields->fields;
				$this->stock_fields = &$this->custom_fields->stock_fields;
			}
// projects
			if($ownerApps['projects'])
				$this->fields['project']['disabled'] = false;
				
			foreach($this->fields as $field => $data)
			{
				if (!$data['disabled'])
				{
					if (isset($var[$field]))
					{
						$sorted[$field] = $var[$field];
					}
					elseif (!isset($this->stock_fields[$field]) && strlen($event[$field]))	// Custom field
					{
						$lang = lang($name = substr($field,1));
						$sorted[$field] = array(
							'field' => $lang == $name.'*' ? $name : $lang,
							'data'  => $event[$field]
						);
					}
				}
				unset($var[$field]);
			}
			foreach($var as $name => $v)
			{
				$sorted[$name] = $v;

			}
			return $sorted;
		}

		/*!
		@function check_set_default_prefs
		@abstract sets the default prefs, if they are not already set (on a per pref. basis)
		@note It sets a flag in the app-session-data to be called only once per session
		*/
		function check_set_default_prefs()
		{
			if (($set = $GLOBALS['phpgw']->session->appsession('default_prefs_set','calendar')))
			{
				return;
			}
			$GLOBALS['phpgw']->session->appsession('default_prefs_set','calendar','set');

			$default_prefs = $GLOBALS['phpgw']->preferences->default['calendar'];

			$subject = lang('Calendar Event') . ' - $$action$$: $$startdate$$ $$title$$'."\n";
			$defaults = array(
				'defaultcalendar' => 'week',
				'mainscreen_showevents' => '0',
				'summary'         => 'no',
				'receive_updates' => 'no',
				'update_format'   => 'extended',
				'notifyAdded'     => $subject . lang ('You have a meeting scheduled for %1','$$startdate$$'),
				'notifyCanceled'  => $subject . lang ('Your meeting scheduled for %1 has been canceled','$$startdate$$'),
				'notifyModified'  => $subject . lang ('Your meeting that had been scheduled for %1 has been rescheduled to %2','$$olddate$$','$$startdate$$'),
				'notifyResponse'  => $subject . lang ('On %1 %2 %3 your meeting request for %4','$$date$$','$$fullname$$','$$action$$','$$startdate$$'),
				'notifyAlarm'     => lang('Alarm for %1 at %2 in %3','$$title$$','$$startdate$$','$$location$$')."\n".lang ('Here is your requested alarm.'),
				'show_rejected'   => '0',
				'display_status'  => '1',
				'weekdaystarts'   => 'Monday',
				'workdaystarts'   => '9',
				'workdayends'     => '17',
				'interval'        => '30',
				'defaultlength'   => '60',
				'planner_start_with_group' => $GLOBALS['phpgw']->accounts->name2id('Default'),
				'planner_intervals_per_day'=> '4',
				'defaultfilter'   => 'all',
				'default_private' => '0',
				'display_minicals'=> '1',
				'print_black_white'=>'0'
			);
			foreach($defaults as $var => $default)
			{
				if (!isset($default_prefs[$var]) || $default_prefs[$var] == '')
				{
					$GLOBALS['phpgw']->preferences->add('calendar',$var,$default,'default');
					$need_save = True;
				}
			}
			if ($need_save)
			{
				$prefs = $GLOBALS['phpgw']->preferences->save_repository(False,'default');
				$this->prefs['calendar'] = $prefs['calendar'];
			}
			if ($this->prefs['calendar']['send_updates'] && !isset($this->prefs['calendar']['receive_updates']))
			{
				$this->prefs['calendar']['receive_updates'] = $this->prefs['calendar']['send_updates'];
				$GLOBALS['phpgw']->preferences->add('calendar','receive_updates',$this->prefs['calendar']['send_updates']);
				$GLOBALS['phpgw']->preferences->delete('calendar','send_updates');
				$prefs = $GLOBALS['phpgw']->preferences->save_repository();
			}
		}

		// return array with all infolog categories (for xmlrpc)
		function categories($complete = False)
		{
			return $GLOBALS['server']->categories($complete);
		}
	}
?>