<?php
	/**************************************************************************\
	* eGroupWare - SIF Parser                                                  *
	* http://www.egroupware.org                                                *
	* Written by Lars Kneschke <l.kneschke@metaways.de>                        *
	* --------------------------------------------                             *
	*  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; version 2 of the License.                     *
	\**************************************************************************/

	/* $Id$ */

	require_once EGW_SERVER_ROOT.'/calendar/inc/class.bocalupdate.inc.php';
	require_once EGW_SERVER_ROOT.'/phpgwapi/inc/horde/Horde/iCalendar.php';

	class sifcalendar extends bocalupdate
	{
		var $sifMapping = array(
			'Start'				=> 'start',
			'End'				=> 'end',
			'AllDayEvent'			=> 'alldayevent',
			'BillingInformation'		=> '',
			'Body'				=> 'description',
			'BusyStatus'			=> '',
			'Categories'			=> 'category',
			'Companies'			=> '',
			'Importance'			=> 'priority',
			'IsRecurring'			=> 'isrecurring',
			'Location'			=> 'location',
			'MeetingStatus'			=> '',
			'Mileage'			=> '',
			'ReminderMinutesBeforeStart'	=> 'reminderstart',
			'ReminderSet'			=> 'reminderset',
			'ReplyTime'			=> '',
			'Sensitivity'			=> 'public',
			'Subject'			=> 'title',
			'RecurrenceType'		=> 'recur_type',
			'Interval'			=> 'recur_interval',
			'MonthOfYear'			=> '',
			'DayOfMonth'			=> '',
			'DayOfWeekMask'			=> 'recur_weekmask',
			'Instance'			=> '',
			'PatternStartDate'		=> '',
			'NoEndDate'			=> 'recur_noenddate',
			'PatternEndDate'		=> 'recur_enddate',
			'Occurrences'			=> '',
		);
		
		// the calendar event array
		var $event;
		
		// constants for recurence type
		const olRecursDaily	= 0;
		const olRecursWeekly	= 1;
		const olRecursMonthly	= 2;
		const olRecursMonthNth	= 3;
		const olRecursYearly	= 5;
		const olRecursYearNth	= 6;
		
		// constants for weekdays
		const olSunday = 1;
		const olMonday = 2;
		const olTuesday = 4;
		const olWednesday = 8;
		const olThursday = 16;
		const olFriday = 32;
		const olSaturday = 64;

		function startElement($_parser, $_tag, $_attributes) {
		}

		function endElement($_parser, $_tag) {
			#error_log($_tag .' => '. $this->sifData);
			if(!empty($this->sifMapping[$_tag])) {
				$this->event[$this->sifMapping[$_tag]] = trim($this->sifData);
			}
			unset($this->sifData);
		}
		
		function characterData($_parser, $_data) {
			$this->sifData .= $_data;
		}
		
		function siftoegw($_sifdata) {
			$vcal		= &new Horde_iCalendar;
			$finalEvent	= array();
			$sysCharSet	= $GLOBALS['egw']->translation->charset();
			$sifData	= base64_decode($_sifdata);
			#error_log($sifData);

			$tmpfname = tempnam('/tmp/sync/contents','sife_');

			$handle = fopen($tmpfname, "w");
			fwrite($handle, $sifData);
			fclose($handle);

			$this->xml_parser = xml_parser_create('UTF-8');
			xml_set_object($this->xml_parser, $this);
			xml_parser_set_option($this->xml_parser, XML_OPTION_CASE_FOLDING, false);
			xml_set_element_handler($this->xml_parser, "startElement", "endElement");
			xml_set_character_data_handler($this->xml_parser, "characterData");
			$this->strXmlData = xml_parse($this->xml_parser, $sifData);
			if(!$this->strXmlData) {
				error_log(sprintf("XML error: %s at line %d",
					xml_error_string(xml_get_error_code($this->xml_parser)),
					xml_get_current_line_number($this->xml_parser)));
				return false;
			}
			#error_log(print_r($this->event, true));

			foreach($this->event as $key => $value) {
				$value = $GLOBALS['egw']->translation->convert($value, 'utf-8', $sysCharSet);
				#error_log("$key => $value");
				switch($key) {
					case 'alldayevent':
						if($value == 1) {
							$startParts = explode('-',$this->event['start']);
							$finalEvent['start'] = mktime(0, 0, 0, $startParts[1], $startParts[2], $startParts[0]);
							$endParts = explode('-',$this->event['end']);
							$finalEvent['end'] = mktime(23, 59, 59, $endParts[1], $endParts[2], $endParts[0]);
						}
						break;
						
					case 'public':
						$finalEvent[$key] = ((int)$value > 0) ? 0 : 1;
						break;
						
					case 'category':
						if(!empty($value)) {
							$egwCategories =& CreateObject('phpgwapi.categories', $GLOBALS['egw_info']['user']['account_id'], 'calendar');
							$categories = explode(';',$value);
							foreach($categories as $categorieName) {
								$cat_id = false;
								$categorieName = trim($categorieName);
								if(!($cat_id = $egwCategories->name2id($categorieName))) {
									$cat_id = $egwCategories->add(array('name' => $categorieName, 'descr' => lang('added by synchronisation')));
								}
								if($cat_id) {
									if(!empty($finalEvent[$key])) $finalEvent[$key] .= ',';
									 $finalEvent[$key] .= $cat_id;
								}
							}
						}
						break;
						
					case 'end':
					case 'start':
						if($this->event['alldayevent'] < 1) {
							$finalEvent[$key] = $vcal->_parseDateTime($value);
						}
						break;
					
					case 'isrecurring':
						if($value == 1) {
							$finalEvent['recur_interval'] = $this->event['recur_interval'];
							if($this->event['recur_noenddate'] == 0) {
								$finalEvent['recur_enddate'] = $vcal->_parseDateTime($this->event['recur_enddate']);
							}
							switch($this->event['recur_type']) {
								case self::olRecursDaily:
									$finalEvent['recur_type']	= MCAL_RECUR_DAILY;
									break;
								
								case self::olRecursWeekly:
									$finalEvent['recur_type']	= MCAL_RECUR_WEEKLY;
									$finalEvent['recur_data']	= $this->event['recur_weekmask'];
									break;
								
								case self::olRecursMonthly:
									$finalEvent['recur_type']	= MCAL_RECUR_MONTHLY_MDAY;
									break;
								
								case self::olRecursMonthNth:
									$finalEvent['recur_type']	= MCAL_RECUR_MONTHLY_WDAY;
									break;
								
								case self::olRecursYearly:
									$finalEvent['recur_type']	= MCAL_RECUR_YEARLY;
									$finalEvent['recur_interval'] = 1;
									break;
							}
						}
						break;
					
					case 'priority':
						$finalEvent[$key] = $value+1;
						break;
						
					case 'reminderset':
						if($value == 1) {
							$finalEvent['alarm'] = $this->event['reminderstart'];
						}
						break;
						
					case 'recur_type':
					case 'recur_enddate':
					case 'recur_interval':
					case 'recur_weekmask':
					case 'reminderstart':
						// do nothing, get's handled in isrecuring clause
						break;
					
					default:
						$finalEvent[$key] = $value;
						break;
				}
			}
			
			#$middleName = ($finalEvent['n_middle']) ? ' '.trim($finalEvent['n_middle']) : '';
			#$finalEvent['fn']  = trim($finalEvent['n_given']. $middleName .' '. $finalEvent['n_family']);

			#error_log(print_r($finalEvent, true));
			
			return $finalEvent;
		}
		
		function search($_sifdata) {
			if(!$event = $this->siftoegw($_sifdata)) {
				return false;
			}

			$query = array(
				'cal_start='.$this->date2ts($event['start'],true),	// true = Server-time
				'cal_end='.$this->date2ts($event['end'],true),
			);
			
			#foreach(array('title','location','priority','public','non_blocking') as $name) {
			foreach(array('title','location','public','non_blocking') as $name) {
				if (isset($event[$name])) $query['cal_'.$name] = $event[$name];
			}

			if($foundEvents = parent::search(array(
				'user'  => $this->user,
				'query' => $query,
			))) {
				if(is_array($foundEvents)) {
					$event = array_shift($foundEvents);
					return $event['id'];
				}
			}
			return false;

			$search['start'] = $event['start'];
			$search['end']	= $event['end'];

			unset($event['description']);
			unset($event['start']);
			unset($event['end']);

			foreach($event as $key => $value) {
				if (substr($key,0,6) != 'recur_' && substr($key,0,5) != 'alarm') {
					$search['query']['cal_'.$key] = $value;
				} else {
					#$search['query'][$key] = $value;
				}
			}

			if($foundEvents = parent::search($search)) {
				if(is_array($foundEvents)) {
					$event = array_shift($foundEvents);
					return $event['id'];
				}
			}

			return false;
		}

		/**
		* @return int contact id
		* @param string	$_vcard		the vcard
		* @param int	$_abID		the internal addressbook id
		* @desc import a vard into addressbook
		*/
		function addSIF($_sifdata, $_calID)
		{
			$calID = false;
			
			#error_log('ABID: '.$_abID);
			#error_log(base64_decode($_sifdata));
			
			if(!$event = $this->siftoegw($_sifdata)) {
				return false;
			}
			
			if(isset($event['alarm'])) {
				$alarm = $event['alarm'];
				unset($event['alarm']);
			}
			
			if($_calID > 0)
			{
				// update entry
				$event['id'] = $_calID;
			}
			
			if($eventID = $this->update($event, TRUE)) {
				$updatedEvent = $this->read($eventID);
				foreach($updatedEvent['alarm'] as $alarmID => $alarmData)
				{
					$this->delete_alarm($alarmID);
				}
				
				if(isset($alarm)) {
					$alarmData['time']	= $event['start'] - ($alarm*60);
					$alarmData['offset']	= $alarm*60;
					$alarmData['all']	= 1;
					$alarmData['owner']	= $GLOBALS['egw_info']['user']['account_id'];
					$this->save_alarm($eventID, $alarmData);
				}
			}
			
			return $eventID;
		}

		/**
		* return a vcard
		*
		* @param int	$_id		the id of the contact
		* @param int	$_vcardProfile	profile id for mapping from vcard values to egw addressbook
		* @return string containing the vcard
		*/
		function getSIF($_id)
		{
			$fields = array_unique(array_values($this->sifMapping));
			sort($fields);

			#$event = $this->read($_id,null,false,'server');
			#error_log("FOUND EVENT: ". print_r($event, true));

			if($event = $this->read($_id,null,false,'server')) {
				$sysCharSet	= $GLOBALS['egw']->translation->charset();
				$vcal		= &new Horde_iCalendar;


				$sifEvent = '<appointment>';

				foreach($this->sifMapping as $sifField => $egwField)
				{
					if(empty($egwField)) continue;
					
					#error_log("$sifField => $egwField");
					#error_log('VALUE1: '.$event[$egwField]);
					$value = $GLOBALS['egw']->translation->convert($event[$egwField], $sysCharSet, 'utf-8');
					#error_log('VALUE2: '.$value);

					switch($sifField)
					{
						case 'Categories':
							if(!empty($value)) {
								$egwCategories =& CreateObject('phpgwapi.categories',$GLOBALS['egw_info']['user']['account_id'],'calendar');
								$categories = explode(',',$value);
								$value = '';
								foreach($categories as $cat_id) {
									if($catData = $egwCategories->return_single($cat_id)) {
										if(!empty($value)) $value .= '; ';
										$value .= $GLOBALS['egw']->translation->convert($catData[0]['name'], $sysCharSet, 'utf-8');
									}
								}
							}
							$sifEvent .= "<$sifField>$value</$sifField>";							
							break;
							
						case 'Importance':
							$value = $value-1;
							$sifEvent .= "<$sifField>$value</$sifField>";							
							break;
							
						case 'RecurrenceType':
						case 'Interval':
						case 'PatternStartDate':
						case 'NoEndDate':
						case 'DayOfWeekMask':
						case 'PatternEndDate':
							break;
						
						case 'IsRecurring':
							switch($event['recur_type']) {
								case MCAL_RECUR_NONE:
									$sifEvent .= "<$sifField>0</$sifField>";							
									break;

								case MCAL_RECUR_DAILY:
									$eventInterval = ($event['recur_interval'] > 1 ? $event['recur_interval'] : 1);
									$recurStartDate = mktime(0,0,0,date('m',$event['start']), date('d', $event['start']), date('Y', $event['start']));
									
									$sifEvent .= "<$sifField>1</$sifField>";							
									$sifEvent .= '<RecurrenceType>'. self::olRecursDaily .'</RecurrenceType>';							
									$sifEvent .= '<Interval>'. $eventInterval .'</Interval>';							
									$sifEvent .= '<PatternStartDate>'. $vcal->_exportDateTime($recurStartDate) .'</PatternStartDate>';
									if($event['recur_enddate'] == 0) {
										$sifEvent .= '<NoEndDate>1</NoEndDate>';
									} else {
										$recurEndDate = mktime(24,0,0,date('m',$event['recur_enddate']), date('d', $event['recur_enddate']), date('Y', $event['recur_enddate']));
										
										$sifEvent .= '<NoEndDate>0</NoEndDate>';
										$sifEvent .= '<PatternEndDate>'. $vcal->_exportDateTime($recurEndDate) .'</PatternEndDate>';
										$totalDays = ($recurEndDate - $recurStartDate) / 86400;
										$occurrences = ceil($totalDays / $eventInterval);
										$sifEvent .= '<Occurrences>'. $occurrences .'</Occurrences>';
									}
									break;

								case MCAL_RECUR_WEEKLY:
									$eventInterval = ($event['recur_interval'] > 1 ? $event['recur_interval'] : 1);
									$recurStartDate = mktime(0,0,0,date('m',$event['start']), date('d', $event['start']), date('Y', $event['start']));
									
									$sifEvent .= "<$sifField>1</$sifField>";							
									$sifEvent .= '<RecurrenceType>'. self::olRecursWeekly .'</RecurrenceType>';							
									$sifEvent .= '<Interval>'. $eventInterval .'</Interval>';							
									$sifEvent .= '<PatternStartDate>'. $vcal->_exportDateTime($recurStartDate) .'</PatternStartDate>';
									$sifEvent .= '<DayOfWeekMask>'. $event['recur_data'] .'</DayOfWeekMask>';
									if($event['recur_enddate'] == 0) {
										$sifEvent .= '<NoEndDate>1</NoEndDate>';
									} else {
										$recurEndDate = mktime(24, 0, 0, date('m',$event['recur_enddate']), date('d', $event['recur_enddate']), date('Y', $event['recur_enddate']));
										
										$daysPerWeek = substr_count(decbin($event['recur_data']),'1');
										$sifEvent .= '<NoEndDate>0</NoEndDate>';
										$sifEvent .= '<PatternEndDate>'. $vcal->_exportDateTime($recurEndDate) .'</PatternEndDate>';
										$totalWeeks = floor(($recurEndDate - $recurStartDate) / (86400*7));
										#error_log("AAA: $daysPerWeek $totalWeeks");
										$occurrences = ($totalWeeks / $eventInterval) * $daysPerWeek;
										for($i = $recurEndDate; $i > $recurStartDate + ($totalWeeks * 86400*7); $i = $i - 86400) {
											switch(date('w', $i-1)) {
												case 0:
													if($event['recur_data'] & 1) $occurrences++;
													break;
												// monday
												case 1:
													if($event['recur_data'] & 2) $occurrences++;
													break;
												case 2:
													if($event['recur_data'] & 4) $occurrences++;
													break;
												case 3:
													if($event['recur_data'] & 8) $occurrences++;
													break;
												case 4:
													if($event['recur_data'] & 16) $occurrences++;
													break;
												case 5:
													if($event['recur_data'] & 32) $occurrences++;
													break;
												case 6:
													if($event['recur_data'] & 64) $occurrences++;
													break;
											}
										}
										$sifEvent .= '<Occurrences>'. $occurrences .'</Occurrences>';
									}
									break;
							}
							break;
						
						case 'Sensitivity':
							$value = (!$value ? '2' : '0');
							$sifEvent .= "<$sifField>$value</$sifField>";							
							break;
							
						case 'Folder':
							# skip currently. This is the folder where Outlook stores the contact.
							#$sifEvent .= "<$sifField>/</$sifField>";
							break;
							
						case 'AllDayEvent':
						case 'End':
							// get's handled by Start clause
							break;

						case 'Start':
							if($event['end'] - $event['start'] == 86399 && date('Y-m-d', $event['end']) == date('Y-m-d', $event['start'])) {
								$value = date('Y-m-d', $event['start']);
								$sifEvent .= "<Start>$value</Start>";
								$sifEvent .= "<End>$value</End>";
								$sifEvent .= "<AllDayEvent>1</AllDayEvent>";
							} else {
								$value = $vcal->_exportDateTime($event['start']);
								$sifEvent .= "<Start>$value</Start>";
								$value = $vcal->_exportDateTime($event['end']);
								$sifEvent .= "<End>$value</End>";
								$sifEvent .= "<AllDayEvent>0</AllDayEvent>";
							}
							break;
							
						case 'ReminderMinutesBeforeStart':
							break;
							
						case 'ReminderSet':
							if(count((array)$event['alarm']) > 0) {
								$sifEvent .= "<$sifField>1</$sifField>";
								foreach($event['alarm'] as $alarmID => $alarmData)
								{
									$sifEvent .= '<ReminderMinutesBeforeStart>'. $alarmData['offset']/60 .'</ReminderMinutesBeforeStart>';
									// lets take only the first alarm
									break;
								}
							} else {
								$sifEvent .= "<$sifField>0</$sifField>";
							}
							break;
						
						default:
							$sifEvent .= "<$sifField>$value</$sifField>";
							break;
					}
				}
				$sifEvent .= '</appointment>';

				return base64_encode($sifEvent);
			}

			if($this->xmlrpc)
			{
				$GLOBALS['server']->xmlrpc_error($GLOBALS['xmlrpcerr']['no_access'],$GLOBALS['xmlrpcstr']['no_access']);
			}
			return False;
		}

	}