/**
 * EGroupware - Calendar - Javascript UI
 *
 * @link http://www.egroupware.org
 * @package calendar
 * @author Hadi Nategh	<hn-AT-stylite.de>
 * @author Nathan Gray
 * @copyright (c) 2008-13 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @version $Id$
 */

/*egw:uses
	/etemplate/js/etemplate2.js;
	/calendar/js/et2_widget_timegrid.js;
	/calendar/js/et2_widget_planner.js;
*/

/**
 * UI for calendar
 *
 * Calendar has multiple different views of the same data.  All the templates
 * for the different view are loaded at the start, then the view objects
 * in app.classes.calendar.views are used to manage the different views.
 * update_state() is used to change the state between the different views, as
 * well as adjust only a single part of the state while keeping the rest unchanged.
 *
 * The event widgets (and the nextmatch) get the data from egw.data, and they
 * register update callbacks to automatically update when the data changes.  This
 * means that when we update something on the server, to update the UI we just need
 * to send back the new data and if the event widget still exists it will update
 * itself.  See calendar_uiforms->ajax_status().
 *
 * To reduce server calls, we also keep a map of day => event IDs.  This allows
 * us to quickly change views (week to day, for example) without requesting additional
 * data from the server.  We keep that map as long as only the date (and a few
 * others - see update_state()) changes.  If user or any of the other filters are
 * changed, we discard the daywise cache and ask the server for the filtered events.
 *
 * @augments AppJS
 */
app.classes.calendar = AppJS.extend(
{
	/**
	 * application name
	 */
	appname: 'calendar',

	/**
	 * etemplate for the sidebox filters
	 */
	sidebox_et2: null,

	/**
	 * Current internal state
	 *
	 * If you need to change state, you can pass just the fields to change to
	 * update_state().
	 */
	state: {
		date: new Date(),
		view: egw.preference('defaultcalendar','calendar') || 'day',
		owner: egw.user('account_id'),
		days: egw.preference('days_in_weekview','calendar')
	},

	states_to_save: ['owner','filter','cat_id','view','sortby','planner_days'],

	// If you are in one of these views and select a date in the sidebox, the view
	// will change as needed to show the date.  Other views will only change the
	// date in the current view.
	sidebox_changes_views: ['day','week','month'],

	/**
	 * Constructor
	 *
	 * @memberOf app.calendar
	 */
	init: function()
	{
		// make calendar object available, even if not running in top window, as sidebox does
		if (window.top !== window && !egw(window).is_popup() && window.top.app.calendar)
		{
			window.app.calendar = window.top.app.calendar;
			return;
		}

		// call parent
		this._super.apply(this, arguments);

		// Scroll
		jQuery(jQuery.proxy(this._scroll,this));
	},

	/**
	 * Destructor
	 */
	destroy: function()
	{
		// call parent
		this._super.apply(this, arguments);

		// remove top window reference
		if (window.top !== window && window.top.app.calendar === this)
		{
			delete window.top.app.calendar;
		}
		jQuery('body').off('.calendar');
	},

	/**
	 * This function is called when the etemplate2 object is loaded
	 * and ready.  If you must store a reference to the et2 object,
	 * make sure to clean it up in destroy().
	 *
	 * @param {etemplate2} _et2 newly ready et2 object
	 * @param {string} _name name of template
	 */
	et2_ready: function(_et2, _name)
	{
		// call parent
		this._super.apply(this, arguments);

		// Avoid many problems with home
		if(_et2.app !== 'calendar') return;

		// Re-init sidebox, since it was probably initialized too soon
		var sidebox = jQuery('#favorite_sidebox_'+this.appname);
		if(sidebox.length == 0 && egw_getFramework() != null)
		{
			var egw_fw = egw_getFramework();
			sidebox= $j('#favorite_sidebox_'+this.appname,egw_fw.sidemenuDiv);
		}

		var content = this.et2.getArrayMgr('content');

		switch (_name)
		{
			case 'calendar.sidebox':
				this.sidebox_et2 = _et2.widgetContainer;
				$j(_et2.DOMContainer).hide();
				this._setup_sidebox_filters();
				break;

			case 'calendar.edit':
				if (typeof content.data['conflicts'] == 'undefined')
				{
					$j(document.getElementById('calendar-edit_calendar-delete_series')).hide();
					//Check if it's fallback from conflict window or it's from edit window
					if (content.data['button_was'] != 'freetime')
					{
						this.set_enddate_visibility();
						this.check_recur_type();
						this.et2.getWidgetById('recur_exception').set_disabled(!content.data.recur_exception ||
							typeof content.data.recur_exception[0] == 'undefined');
					}
					else
					{
						this.freetime_search();
					}
					//send Syncronus ajax request to the server to unlock the on close entry
					//set onbeforeunload with json request to send request when the window gets close by X button
					if (content.data.lock_token)
					{
						window.onbeforeunload = function () {
							this.egw.json('calendar.calendar_uiforms.ajax_unlock',
							[content.data.id, content.data.lock_token],null,true,null,null).sendRequest(true);
						};
					}
				}
				this.alarm_custom_date();
				break;

			case 'calendar.freetimesearch':
				this.set_enddate_visibility();
				break;
			case 'calendar.list':
				this.filter_change();
		}

		// Record the templates for the views so we can switch between them
		this._et2_view_init(_et2,_name);
	},

	/**
	 * Observer method receives update notifications from all applications
	 *
	 * App is responsible for only reacting to "messages" it is interested in!
	 *
	 * @param {string} _msg message (already translated) to show, eg. 'Entry deleted'
	 * @param {string} _app application name
	 * @param {(string|number)} _id id of entry to refresh or null
	 * @param {string} _type either 'update', 'edit', 'delete', 'add' or null
	 * - update: request just modified data from given rows.  Sorting is not considered,
	 *		so if the sort field is changed, the row will not be moved.
	 * - edit: rows changed, but sorting may be affected.  Requires full reload.
	 * - delete: just delete the given rows clientside (no server interaction neccessary)
	 * - add: requires full reload for proper sorting
	 * @param {string} _msg_type 'error', 'warning' or 'success' (default)
	 * @param {object|null} _links app => array of ids of linked entries
	 * or null, if not triggered on server-side, which adds that info
	 * @return {false|*} false to stop regular refresh, thought all observers are run
	 */
	observer: function(_msg, _app, _id, _type, _msg_type, _links)
	{
		var do_refresh = false;
		switch(_app)
		{
			case 'infolog':
				jQuery('.calendar_calDayTodos')
					.find('a')
					.each(function(i,a){
						var match = a.href.split(/&info_id=/);
						if (match && typeof match[1] !="undefined")
						{
							if (match[1]== _id)	do_refresh = true;
						}
					});
				if (jQuery('div [id^="infolog'+_id+'"],div [id^="drag_infolog'+_id+'"]').length > 0) do_refresh = true;
				switch (_type)
				{
					case 'add':
						do_refresh = true;
						break;
				}
				if (do_refresh)
				{
					if (typeof this.et2 != 'undefined' && this.et2 !=null)
					{
						this.egw.refresh(_msg, 'calendar');
					}
					else
					{
						var iframe = parent.jQuery(parent.document).find('.egw_fw_content_browser_iframe');
						var calTab = iframe.parentsUntil(jQuery('.egw_fw_ui_tab_content'),'.egw_fw_ui_tab_content');

						if (!calTab.is(':visible'))
						{
							// F.F can not handle to style correctly an iframe which is hidden (display:none), therefore we need to
							// bind a handler to refresh the calendar views after it shows up
							iframe.one('show',function(){egw_refresh('','calendar');});
						}
						else
						{
							//window.location.reload();
							window.egw_refresh('refreshing calendar','calendar');
						}
					}
				}
				break;
			case 'calendar':
				if(_id)
				{
					var event = egw.dataGetUIDdata('calendar::'+_id);
					if(event && event.data && event.data.date)
					{
						var new_cache_id = app.classes.calendar._daywise_cache_id(event.data.date,this.state.owner)
						var daywise = egw.dataGetUIDdata(new_cache_id);
						daywise = daywise ? daywise.data : [];
						if(_type === 'delete')
						{
							daywise.splice(daywise.indexOf(_id),1);
						}
						else if (daywise.indexOf(_id) < 0)
						{
							daywise.push(_id);
						}
						egw.dataStoreUID(new_cache_id,daywise);
					}
				}
				else
				{
					// Full refresh, clear the caches
					var daywise = egw.dataKnownUIDs(app.classes.calendar.DAYWISE_CACHE_ID);
					for(var i = 0; i < daywise.length; i++)
					{
						egw.dataDeleteUID(app.classes.calendar.DAYWISE_CACHE_ID + '::' + daywise[i]);
					}
					var events = egw.dataKnownUIDs(_app);
					for(var i = 0; i < events.length; i++)
					{
						egw.dataDeleteUID(_app + '::' + events[i]);
					}
					// Force redraw to default state
					this.setState({});
				}
				break;
		}
	},

	/**
	 * Link hander for jDots template to just reload our iframe, instead of reloading whole admin app
	 *
	 * @param {String} _url
	 * @return {boolean|string} true, if linkHandler took care of link, false for default processing or url to navigate to
	 */
	linkHandler: function(_url)
	{
		if (_url.match('menuaction=calendar\.calendar_uiviews\.'))
		{
			var view = _url.match(/calendar_uiviews\.([^&?]+)/);
			view = view && view.length > 1 ? view[1] : null;

			// Get query
			var q = {};
			_url.split('?')[1].split('&').forEach(function(i){
				q[i.split('=')[0]]=i.split('=')[1];
			});
			delete q.ajax;
			delete q.menuaction;
			if((!view || view == 'index') && q.view) view = q.view;

			if (this.sidebox_et2 && typeof app.classes.calendar.views[view] == 'undefined')
			{
				this.sidebox_et2.getWidgetById('iframe').set_src(_url);
				return true;
			}
			// Known AJAX view
			else if(app.classes.calendar.views[view])
			{
				if(typeof app.classes.calendar.views[view].etemplates[0] == 'string')
				{
					return _url + '&ajax=true';
				}
				// Already loaded, we'll just apply any variables to our current state
				var set = jQuery.extend({view: view},q);
				this.update_state(set);
				return true;
			}
		}
		else if (_url.indexOf('menuaction=calendar.calendar_') >= 0)
		{
			var iframe = this.sidebox_et2.getWidgetById('iframe');
			iframe.set_src(_url);
			$j(this.sidebox_et2.parentNode).show();
			// Hide other views
			for(var _view in app.classes.calendar.views)
			{
				for(var i = 0; i < app.classes.calendar.views[_view].etemplates.length; i++)
				{
					$j(app.classes.calendar.views[_view].etemplates[i].DOMContainer).hide();
				}
			}
			this.state.view = '';
			return true;
		}
		// can not load our own index page, has to be done by framework
		return false;
	},

	/**
	 * Setup and handle sortable calendars.
	 *
	 * You can only sort calendars if there is more than one owner, and the calendars
	 * are not combined (many owners, multi-week or month views)
	 * @returns {undefined}
	 */
	_sortable: function() {
		// Calender current state
		var state = this.getState();
		var sortable = jQuery('#calendar-view_view tbody');
		if(!sortable.sortable('instance'))
		{
			jQuery('#calendar-view_view tbody').sortable({
				cancel: "#divAppboxHeader, .calendar_calWeekNavHeader, .calendar_plannerHeader",
				handle: '.calendar_calGridHeader',
				//placeholder: "srotable_cal_wk_ph",
				axis:"y",
				revert: true,
				helper:"clone",
				create: function ()
				{
					var $sortItem = jQuery(this);
				},
				start: function (event, ui)
				{
					$j('.calendar_calTimeGrid',ui.helper).css('position', 'absolute');
					// Put owners into row IDs
					app.classes.calendar.views[app.calendar.state.view].etemplates[0].widgetContainer.iterateOver(function(widget) {
						widget.div.parents('tr').attr('data-owner',widget.options.owner);
					},this,et2_calendar_timegrid);
				},
				stop: function ()
				{
				},
				update: function ()
				{
					var state = app.calendar.getState();
					if (state && typeof state.owner !== 'undefined')
					{
						var sortedArr = sortable.sortable('toArray', {attribute:"data-owner"});
						// Directly update, since there is no other changes needed,
						// and we don't want the current sort order applied
						app.calendar.state.owner = sortedArr;
					}
				}
			});
		}

		// Enable or disable
		if((state.view == 'day' || state.view == 'week') &&
			state.owner.length > 1 && state.owner.length < egw.config('calview_no_consolidate','phpgwapi'))
		{
			sortable.sortable('enable')
				.sortable("refresh")
				.disableSelection();
			var options = {};
			switch (state.view)
			{
				case "day":
					options = {
						placeholder:"srotable_cal_day_ph",
						axis:"x"
					};
					sortable.sortable('option', options);
					break;
				case "week":
					options = {
						placeholder:"srotable_cal_wk_ph",
						axis:"y"
					};
					sortable.sortable('option', options);
					break;
			}
		}
		else
		{
			sortable.sortable('disable');
		}
	},

	/**
	 * Bind scroll event
	 * When the user scrolls, we'll move enddate - startdate days
	 */
	_scroll: function() {
		// Bind only once, to the whole thing
		jQuery('body').off('.calendar')
			//.on('wheel','.et2_container:#calendar-list,#calendar-sidebox)',
			.on('wheel.calendar','.et2_container .calendar_calTimeGrid, .et2_container .calendar_plannerWidget',
				function(e)
				{
					e.preventDefault();
					var direction = e.originalEvent.deltaY > 0 ? 1 : -1;
					var delta = 1;
					var start = new Date(app.calendar.state.date);
					var end = null;

					// Find the template
					var id = $j(this).closest('.et2_container').attr('id');
					if(!id) return;
					var template = etemplate2.getById(id);
					if(!template) return;


					// Get the view to calculate
					var view = app.classes.calendar.views[app.calendar.state.view] || false;
					if (view && view.etemplates.indexOf(template) !== -1)
					{
						start = view.scroll(direction * delta);
						app.calendar.update_state({date:app.calendar.date.toString(start)});
					}
					else
					{
						// Home - always 1 week
						// TODO
						return false;
						var widget = [];
						var value = [];
						template.widgetContainer.iterateOver(function(w) {
							if(typeof w.set_start_date === 'function' && typeof w.set_value === 'function')
							{
								widget.push(w);
							}
						},this,et2_valueWidget);
						for(var i = 0; i < widget.length; i++)
						{
							var state = template.widgetContainer.getParent().settings.favorite.state || {};
							debugger;
							var start = new Date(widget[i].options.start_date || state.start);
							start.setUTCDate(start.getUTCDate() + (7 * direction * delta));
							var end = new Date(widget[i].options.end_date || state.end);
							end.setUTCDate(end.getUTCDate() + (7 * direction * delta));

							// Get data
							value[i] = {
								start_date: start,
								end_date: end
							};
							app.calendar._need_data([value[i]], state);
							widget[i].set_value(value[i]);
						}
					}

					return false;
				}
			);
	},

	/**
	 * Function to help calendar resizable event, to fetch the right droppable cell
	 *
	 * @param {int} _X position left of draggable element
	 * @param {int} _Y position top of draggable element
	 *
	 * @return {jquery object|boolean} return selected jquery if not return false
	 */
	resizeHelper: function(_X,_Y)
	{
		var $drops = jQuery("div[id^='drop_']");
		var top = Math.round(_Y);
		var left = Math.round(_X);
		for (var i=0;i < $drops.length;i++)
		{
			if (top >= Math.round($drops[i].getBoundingClientRect().top)
					&& top <= Math.round($drops[i].getBoundingClientRect().bottom)
					&& left >= Math.round($drops[i].getBoundingClientRect().left)
					&& left <= Math.round($drops[i].getBoundingClientRect().right))
				return $drops[i];
		}
		return false;
	},

	/**
	 * Convert AM/PM dateTime format to 24h
	 *
	 * @param {string} _date dnd date format: dateTtime{am|pm}, eg. 121214T1205 am
	 *
	 * @return {string} 24h format date
	 */
	cal_dnd_tZone_converter : function (_date)
	{
		var date = _date;
		if (_date !='undefined')
		{
			var tZone = _date.split('T')[1];
			if (tZone.search('am') > 0)
			{
				tZone = tZone.replace(' am','');
				var tAm = tZone.substr(0,2);
				if (tAm == '12')
				{
					tZone = tZone.replace('12','00');
				}
				date = _date.split('T')[0] + 'T' + tZone;
			}
			if (tZone.search('pm') > 0)
			{
				var pmTime = tZone.replace(' pm','');
				var H = parseInt(pmTime.substring(0,2)) + 12;
				pmTime = H.toString() + pmTime.substr(2,2);
				date = _date.split('T')[0] + 'T' + pmTime;
			}

		}
		return date;
	},

	/**
	 * Handler for changes generated by internal user interactions, like
	 * drag & drop inside calendar and resize.
	 *
	 * @param {Event} event
	 * @param {et2_calendar_event} widget Widget for the event
	 * @param {string} dialog_button - 'single', 'series', or 'exception', based on the user's answer
	 *	in the popup
	 * @returns {undefined}
	 */
	event_change: function(event, widget, dialog_button)
	{
		// Add loading spinner - not visible if the body / gradient is there though
		widget.div.addClass('loading');
		egw().json(
			'calendar.calendar_uiforms.ajax_moveEvent',
			[widget.options.value.id, widget.options.value.owner, widget.options.value.start, widget.options.value.owner, widget.options.value.duration],
			// Remove loading spinner
			function() {widget.div.removeClass('loading');}
		).sendRequest(true);
	},

	/**
	 * This function tries to recognise the type of dropped event, and sends relative request to server accordingly
	 *	-ATM we have three different requests:
	 *		-1. Event part of series
	 *		-2. Single Event (Normall Cal Event)
	 *		-3. Integrated Infolog Event
	 *
	 * @param {string} _id dragged event id
	 * @param {array} _date array of date,hour, and minute of dropped cell
	 * @param {string} _duration description
	 * @param {string} _eventFlag Flag to distinguish whether the event is Whole Day, Series, or Single
	 *	- S represents Series
	 *	- WD represents Whole Day
	 *	- WDS represents Whole Day Series (recurrent whole day event)
	 *	- '' represents Single
	 */
	dropEvent : function(_id, _date, _duration, _eventFlag)
	{
		var eventId = _id.substring(_id.lastIndexOf("drag_")+5,_id.lastIndexOf("_O"));
		var calOwner = _id.substring(_id.lastIndexOf("_O")+2,_id.lastIndexOf("_C"));
		var eventOwner = _id.substring(_id.lastIndexOf("_C")+2,_id.lastIndexOf(""));
		var date = this.cal_dnd_tZone_converter(_date);

		if (_eventFlag == 'S')
		{
			et2_dialog.show_dialog(function(_button_id)
			{
				if (_button_id == et2_dialog.OK_BUTTON)
				{
					egw().json('calendar.calendar_uiforms.ajax_moveEvent', [eventId, calOwner, date, eventOwner, _duration]).sendRequest();
				}
			},this.egw.lang("Do you really want to change the start of this series? If you do, the original series will be terminated as of today and a new series for the future reflecting your changes will be created."),
			this.egw.lang("This event is part of a series"), {}, et2_dialog.BUTTONS_OK_CANCEL , et2_dialog.WARNING_MESSAGE);
		}
		else
		{
			//Get infologID if in case if it's an integrated infolog event
			var infolog_id = eventId.split('infolog')[1];

			if (infolog_id)
			{
				// If it is an integrated infolog event we need to edit infolog entry
				egw().json('stylite_infolog_calendar_integration::ajax_moveInfologEvent', [infolog_id, date,_duration]).sendRequest();
			}
			else
			{
				//Edit calendar event
				egw().json('calendar.calendar_uiforms.ajax_moveEvent',[eventId,	calOwner, date,	eventOwner,	_duration]).sendRequest();
			}
		}
	},

	/**
	 * open the freetime search popup
	 *
	 * @param {string} _link
	 */
	freetime_search_popup: function(_link)
	{
		this.egw.open_link(_link,'ft_search','700x500') ;
	},

	/**
	 * send an ajax request to server to set the freetimesearch window content
	 *
	 */
	freetime_search: function()
	{
		var content = this.et2.getArrayMgr('content').data;
		content['start'] = this.et2.getWidgetById('start').get_value();
		content['end'] = this.et2.getWidgetById('end').get_value();
		content['duration'] = this.et2.getWidgetById('duration').get_value();

		var request = this.egw.json('calendar.calendar_uiforms.ajax_freetimesearch', [content],null,null,null,null);
		request.sendRequest();
	},

	/**
	 * Function for disabling the recur_data multiselect box
	 *
	 */
	check_recur_type: function()
	{
		var recurType = this.et2.getWidgetById('recur_type');
		var recurData = this.et2.getWidgetById('recur_data');

		if(recurType && recurData)
		{
			recurData.set_disabled(recurType.get_value() != 2);
		}
	},

	/**
	 * Show/Hide end date, for both edit and freetimesearch popups,
	 * based on if "use end date" selected or not.
	 *
	 */
	set_enddate_visibility: function()
	{
		var duration = this.et2.getWidgetById('duration');
		var start = this.et2.getWidgetById('start');
		var end = this.et2.getWidgetById('end');
		var content = this.et2.getArrayMgr('content').data;

		if (typeof duration != 'undefined' && typeof end != 'undefined')
		{
			end.set_disabled(duration.get_value()!=='');
			if (!end.disabled )
			{
				end.set_value(start.get_value());
				if (typeof content.duration != 'undefined') end.set_value("+"+content.duration);
			}
		}
	},

	/**
	 * handles actions selectbox in calendar edit popup
	 *
	 * @param {mixed} _event
	 * @param {et2_base_widget} widget "actions selectBox" in edit popup window
	 */
	actions_change: function(_event, widget)
	{
		var event = this.et2.getArrayMgr('content').data;
		if (widget)
		{
			var id = this.et2.getArrayMgr('content').data['id'];
			switch (widget.get_value())
			{
				case 'print':
					this.egw.open_link('calendar.calendar_uiforms.edit&cal_id='+id+'&print=1','_blank','700x700');
					break;
				case 'mail':
					this.egw.json('calendar.calendar_uiforms.ajax_custom_mail', [event, !event['id'], false],null,null,null,null).sendRequest();
					this.et2._inst.submit();
					break;
				case 'sendrequest':
					this.egw.json('calendar.calendar_uiforms.ajax_custom_mail', [event, !event['id'], true],null,null,null,null).sendRequest();
					this.et2._inst.submit();
					break;
				case 'infolog':
					this.egw.open_link('infolog.infolog_ui.edit&action=calendar&action_id='+($j.isPlainObject(event)?event['id']:event),'_blank','700x600','infolog');
					this.et2._inst.submit();
					break;
				case 'ical':
					this.et2._inst.postSubmit();
					break;
				default:
					this.et2._inst.submit();
			}
		}
	},

	/**
	 * open mail compose popup window
	 *
	 * @param {Array} vars
	 * @todo need to provide right mail compose from server to custom_mail function
	 */
	custom_mail: function (vars)
	{
		this.egw.open_link(this.egw.link("/index.php",vars),'_blank','700x700');
	},

	/**
	 * control delete_series popup visibility
	 *
	 * @param {et2_widget} widget
	 * @param {Array} exceptions an array contains number of exception entries
	 *
	 */
	delete_btn: function(widget,exceptions)
	{
		var content = this.et2.getArrayMgr('content').data;

		if (exceptions)
		{
			var buttons = [
				{
					button_id: 'keep',
					statustext:'All exceptions are converted into single events.',
					text: 'Keep exceptions',
					id: 'button[delete_keep_exceptions]',
					image: 'keep', "default":true
				},
				{
					button_id: 'delete',
					statustext:'The exceptions are deleted together with the series.',
					text: 'Delete exceptions',
					id: 'button[delete_exceptions]',
					image: 'delete'
				},
				{
					button_id: 'cancel',
					text: 'Cancel',
					id: 'dialog[cancel]',
					image: 'cancel'
				}

			];
			var self = this;
			et2_dialog.show_dialog
			(
					function(_button_id)
					{
						if (_button_id != 'dialog[cancel]')
						{
							self.et2._inst.submit(_button_id);
							return true;
						}
						else
						{
							return false;
						}
					},
					this.egw.lang("Do you want to keep the series exceptions in your calendar?"),
					this.egw.lang("This event is part of a series"), {}, buttons , et2_dialog.WARNING_MESSAGE
			);
		}
		else if (content['recur_type'] !== 0)
		{
			et2_dialog.confirm(widget,'Delete this series of recuring events','Delete Series');
		}
		else
		{
			et2_dialog.confirm(widget,'Delete this event','Delete');
		}
	},

	/**
	 * print_participants_status(egw,widget)
	 * Handle to apply changes from status in print popup
	 *
	 * @param {mixed} _event
	 * @param {et2_base_widget} widget widget "status" in print popup window
	 *
	 */
	print_participants_status: function(_event, widget)
	{
		if (widget && window.opener)
		{
			//Parent popup window
			var editPopWindow = window.opener;

			if (editPopWindow)
			{
				//Update paretn popup window
				editPopWindow.etemplate2.getByApplication('calendar')[0].widgetContainer.getWidgetById(widget.id).set_value(widget.get_value());
			}
			this.et2._inst.submit();

			editPopWindow.opener.egw_refresh('status changed','calendar');
		}
		else if (widget)
		{
			window.egw_refresh(this.egw.lang('The original popup edit window is closed! You need to close the print window and reopen the entry again.'),'calendar');
		}
	},

	/**
	 * In edit popup, search for calendar participants.
	 * Resources need to have the start & duration (etc.)
	 * passed along in the query.
	 *
	 * @param {Object} request
	 * @param {et2_link_entry} widget
	 *
	 * @returns {boolean} True to continue with the search
	 */
	edit_participant_search: function(request, widget)
	{
		if(widget.app_select.val() == 'resources')
		{
			// Resources search is expecting exec
			var values = widget.getInstanceManager().getValues(widget.getRoot());
			if(typeof request.options != 'object' || request.options == null)
			{
				request.options = {};
			}
			request.options.exec = {
				start: values.start,
				end: values.end,
				duration: values.duration,
				participants: values.participants,
				recur_type: values.recur_type,
				event_id: values.link_to.to_id, // cal_id, if available
				show_conflict: (egw.preference('defaultresource_sel','calendar') == 'resources_without_conflict') ? '0' : '1'
			};
			if(values.whole_day)
			{
				request.options.exec.whole_date = true;
			}
		}
		return true;
	},

	/**
	 * Handles to select freetime, and replace the selected one on Start,
	 * and End date&time in edit calendar entry popup.
	 *
	 * @param {mixed} _event
	 * @param {et2_base_widget} _widget widget "select button" in freetime search popup window
	 *
	 */
	freetime_select: function(_event, _widget)
	{
		if (_widget)
		{
			var content = this.et2._inst.widgetContainer.getArrayMgr('content').data;
			// Make the Id from selected button by checking the index
			var selectedId = _widget.id.match(/^select\[([0-9])\]$/i)[1];

			var sTime = this.et2.getWidgetById(selectedId+'start');

			//check the parent window is still open before to try to access it
			if (window.opener && sTime)
			{
				var editWindowObj = window.opener.etemplate2.getByApplication('calendar')[0];
				if (typeof editWindowObj != "undefined")
				{
					var startTime = editWindowObj.widgetContainer.getWidgetById('start');
					var endTime = editWindowObj.widgetContainer.getWidgetById('end');
					if (startTime && endTime)
					{
						startTime.set_value(sTime.get_value());
						endTime.set_value(sTime.get_value());
						endTime.set_value('+'+content['duration']);
					}
				}
			}
			else
			{
				alert(this.egw.lang('The original calendar edit popup is closed!'));
			}
		}
		egw(window).close();
	},

	/**
	 * show/hide the filter of nm list in calendar listview
	 *
	 */
	filter_change: function()
	{
		var filter = this.et2 ? this.et2.getWidgetById('filter') : null;
		var dates = this.et2 ? this.et2.getWidgetById('calendar.list.dates') : null;

		if (filter && dates)
		{
			dates.set_disabled(filter.value !== "custom");
		}
	},

	/**
	 * Application links from non-list events
	 *
	 * @param {egwAction} _action
	 * @param {egwActionObject[]} _events
	 */
	action_open: function(_action, _events)
	{
		var id = _events[0].id.split('::');
		if(_action.data.open)
		{
			var open = JSON.parse(_action.data.open) || {};
			var extra = open.extra || '';

			extra = extra.replace(/(\$|%24)app/,id[0]).replace(/(\$|%24)id/,id[1]);
			this.egw.open(open.id_data||'',open.app,open.type,extra);
		}
		else if (_action.data.url)
		{
			var url = _action.data.url;
			url = url.replace(/(\$|%24)app/,id[0]).replace(/(\$|%24)id/,id[1]);
			this.egw.open_link(url);
		}
	},

	/**
	 * Change status (via AJAX)
	 *
	 * @param {egwAction} _action
	 * @param {egwActionObject} _events
	 */
	status: function(_action, _events)
	{
		// Should be a single event, but we'll do it for all
		for(var i = 0; i < _events.length; i++)
		{
			var event_widget = _events[i].iface.getWidget() || false;
			if(!event_widget) continue;

			event_widget.recur_prompt(jQuery.proxy(function(button_id,event_data) {
				switch(button_id)
				{
					case 'exception':
						egw().json(
							'calendar.calendar_uiforms.ajax_status',
							[event_data.app_id, egw.user('account_id'), _action.data.id]
						).sendRequest(true);
						break;
					case 'series':
					case 'single':
						egw().json(
							'calendar.calendar_uiforms.ajax_status',
							[event_data.id, egw.user('account_id'), _action.data.id]
						).sendRequest(true);
						break;
					case 'cancel':
					default:
						break;
				}
			},this));
		}

	},

	/**
	 * this function try to fix ids which are from integrated apps
	 *
	 * @param {egwAction} _action
	 * @param {egwActionObject[]} _senders
	 */
	cal_fix_app_id: function(_action, _senders)
	{
		var app = 'calendar';
		var id = _senders[0].id;
		var matches = id.match(/^(?:calendar::)?([0-9]+)(:([0-9]+))?$/);
		if (matches)
		{
			id = matches[1];
		}
		else
		{
			matches = id.match(/^([a-z_-]+)([0-9]+)/i);
			if (matches)
			{
				app = matches[1];
				id = matches[2];
			}
		}
		var backup_url = _action.data.url;

		_action.data.url = _action.data.url.replace(/(\$|%24)id/,id);
		_action.data.url = _action.data.url.replace(/(\$|%24)app/,app);

		nm_action(_action, _senders,false,{ids:[id]});

		_action.data.url = backup_url;	// restore url
	},

	/**
	 * Open calendar entry, taking into accout the calendar integration of other apps
	 *
	 * calendar_uilist::get_rows sets var js_calendar_integration object
	 *
	 * @param _action
	 * @param _senders
	 *
	 */
	cal_open: function(_action, _senders)
	{

		if(_action.parent.data && _action.parent.data.nextmatch)
		{
			var js_integration_data = _action.parent.data.nextmatch.options.settings.js_integration_data || this.et2.getArrayMgr('content').data.nm.js_integration_data;
		}
		var id = _senders[0].id;
		var matches = id.match(/^(?:calendar::)?([0-9]+):([0-9]+)$/);
		var backup = _action.data;
		if (matches)
		{
			this.edit_series(matches[1],matches[2]);
			return;
		}
		matches = id.match(/^([a-z_-]+)([0-9]+)/i);
		if (matches && js_integration_data)
		{
			var app = matches[1];
			_action.data.url = window.egw_webserverUrl+'/index.php?';
			var get_params = js_integration_data[app].edit;
			get_params[js_integration_data[app].edit_id] = matches[2];
			for(var name in get_params)
				_action.data.url += name+"="+encodeURIComponent(get_params[name])+"&";

			if (js_integration_data[app].edit_popup)
			{
				matches = js_integration_data[app].edit_popup.match(/^(.*)x(.*)$/);
				if (matches)
				{
					_action.data.width = matches[1];
					_action.data.height = matches[2];
				}
				else
				{
					_action.data.nm_action = 'location';
				}
			}
		}
		egw.open(id.replace(/^calendar::/g,''),'calendar','edit');
		_action.data = backup;	// restore url, width, height, nm_action
	},

	/**
	 * Delete (a single) calendar entry over ajax.
	 *
	 * Used for the non-list views
	 *
	 * @param {egwAction} _action
	 * @param {egwActionObject} _events
	 */
	delete: function(_action, _events)
	{
		// Should be a single event, but we'll do it for all
		for(var i = 0; i < _events.length; i++)
		{
			var event_widget = _events[i].iface.getWidget() || false;
			if(!event_widget) continue;

			event_widget.recur_prompt(jQuery.proxy(function(button_id,event_data) {
				switch(button_id)
				{
					case 'exception':
						egw().json(
							'calendar.calendar_uiforms.ajax_delete',
							[event_data.app_id]
						).sendRequest(true);
						break;
					case 'series':
					case 'single':
						egw().json(
							'calendar.calendar_uiforms.ajax_delete',
							[event_data.id]
						).sendRequest(true);
						break;
					case 'cancel':
					default:
						break;
				}
			},this));
		}
	},

	/**
	 * Delete calendar entry, asking if you want to delete series or exception
	 *
	 * Used for nextmatch
	 *
	 * @param _action
	 * @param _senders
	 */
	cal_delete: function(_action, _senders)
	{
		var backup = _action.data;
		var matches = false;

		// Loop so we ask if any of the selected entries is part of a series
		for(var i = 0; i < _senders.length; i++)
		{
			var id = _senders[i].id;
			if(!matches)
			{
				matches = id.match(/^(?:calendar::)?([0-9]+):([0-9]+)$/);
			}
		}
		if (matches)
		{
			var popup = jQuery('#calendar-list_delete_popup').get(0);
			if (typeof popup != 'undefined')
			{
				// nm action - show popup
				nm_open_popup(_action,_senders);
			}
			return;
		}

		nm_action(_action, _senders);
	},

	/**
	 * Confirmation dialog for moving a series entry
	 *
	 * @param {object} _DOM
	 * @param {et2_widget} _button button Save | Apply
	 */
	move_edit_series: function(_DOM,_button)
	{
		var content = this.et2.getArrayMgr('content').data;
		var start_date = this.et2.getWidgetById('start').get_value();
		var whole_day = this.et2.getWidgetById('whole_day');
		var is_whole_day = whole_day && whole_day.get_value() == whole_day.options.selected_value;
		var button = _button;
		var that = this;
		if (typeof content != 'undefined' && content.id != null &&
			typeof content.recur_type != 'undefined' && content.recur_type != null && content.recur_type != 0
		)
		{
			if (content.start != start_date || content.whole_day != is_whole_day)
			{
				et2_dialog.show_dialog(function(_button_id)
					{
						if (_button_id == et2_dialog.OK_BUTTON)
						{
							that.et2._inst.submit(button);

						}
						else
						{
							return false;
						}
					},
					this.egw.lang("Do you really want to change the start of this series? If you do, the original series will be terminated as of today and a new series for the future reflecting your changes will be created."),
					this.egw.lang("This event is part of a series"), {}, et2_dialog.BUTTONS_OK_CANCEL , et2_dialog.WARNING_MESSAGE);
			}
			else
			{
				return true;
			}
		}
		else
		{
			return true;
		}
	},

	/**
	 * Create edit exception dialog for recurrence entries
	 *
	 * @param {object} event
	 * @param {string} id cal_id
	 * @param {integer} date timestamp
	 */
	edit_series: function(event,id,date)
	{
		// Coming from list, there is no event
		if(arguments.length == 2)
		{
			date = id;
			id = event;
			event = null;
		}
		var edit_id = id;
		var edit_date = date;
		var that = this;
		var buttons = [
			{text: this.egw.lang("Edit exception"), id: "exception", class: "ui-priority-primary", "default": true},
			{text: this.egw.lang("Edit series"), id:"series"},
			{text: this.egw.lang("Cancel"), id:"cancel"}
		];
		et2_dialog.show_dialog(function(_button_id)
		{
			switch(_button_id)
			{
				case 'exception':
					that.egw.open(edit_id, 'calendar', 'edit', '&date='+edit_date+'&exception=1');
					break;
				case 'series':
					that.egw.open(edit_id, 'calendar', 'edit', '&date='+edit_date);
					break;
				case 'cancel':

				default:
					break;
			}
		},this.egw.lang("Do you want to edit this event as an exception or the whole series?"),
		this.egw.lang("This event is part of a series"), {}, buttons, et2_dialog.WARNING_MESSAGE);
	},

	/**
	 * Method to set state for JSON requests (jdots ajax_exec or et2 submits can NOT use egw.js script tag)
	 *
	 * @param {object} _state
	 */
	set_state: function(_state)
	{
		if (typeof _state == 'object')
		{
			// If everything is loaded, handle the changes
			if(this.sidebox_et2 !== null)
			{
				this.update_state(_state);
			}
			else
			{
				// Things aren't loaded yet, just set it
				this.state = _state;
			}
		}
	},

	/**
	 * Change only part of the current state.
	 *
	 * The passed state options (filters) are merged with the current state, so
	 * this is the one that should be used for most calls, as setState() requires
	 * the complete state.
	 *
	 * @param {Object} _set New settings
	 */
	update_state: function(_set)
	{
		// Make sure we're running in top window
		if(window !== window.top)
		{
			return window.top.app.calendar.update_state(_set);
		}
		if(this.state_update_in_progress) return;

		var changed = [];
		var new_state = jQuery.extend({}, this.state);
		var cachable_changes = ['date','view','days','planner_days','sortby'];
		if (typeof _set === 'object')
		{
			for(var s in _set)
			{
				if(cachable_changes.indexOf(s) === -1)
				{
					// Expire daywise cache
					var daywise = egw.dataKnownUIDs(app.classes.calendar.DAYWISE_CACHE_ID);
					for(var i = 0; i < daywise.length; i++)
					{
						egw.dataDeleteUID(app.classes.calendar.DAYWISE_CACHE_ID + '::' + daywise[i]);
					}
				}
				if (new_state[s] !== _set[s])
				{
					changed.push(s + ': ' + new_state[s] + ' -> ' + _set[s]);
					new_state[s] = _set[s];
				}
			}
		}
		if(changed.length && !this.state_update_in_progress)
		{
			console.log('Calendar state changed',changed.join("\n"));
			// Log
			this.egw.debug('navigation','Calendar state changed', changed.join("\n"));
			this.setState({state: new_state});
		}
	},

	/**
	 * Return state object defining current view
	 *
	 * Called by favorites to query current state.
	 *
	 * @return {object} description
	 */
	getState: function()
	{
		var state = jQuery.extend({},this.state);

		if (!state)
		{
			var egw_script_tag = document.getElementById('egw_script_id');
			state = egw_script_tag.getAttribute('data-calendar-state');
			state = state ? JSON.parse(state) : {};
		}

		// Make sure date is consitantly a string, in case it needs to be passed to server
		if(state.date && state.date.toJSON)
		{
			state.date = state.date.toJSON();
		}

		// Don't store current user in state to allow admins to create favourites for all
		// Should make no difference for normal users.
		if(state.owner == egw.user('account_id'))
		{
			// 0 is always the current user, so if an admin creates a default favorite,
			// it will work for other users too.
			state.owner = 0;
		}
		// Don't store first and last
		delete state.first;
		delete state.last;

		return state;
	},

	/**
	 * Set a state previously returned by getState
	 *
	 * Called by favorites to set a state saved as favorite.
	 *
	 * @param {object} state containing "name" attribute to be used as "favorite" GET parameter to a nextmatch
	 */
	setState: function(state)
	{
		// State should be an object, not a string, but we'll parse
		if(typeof state == "string")
		{
			if(state.indexOf('{') != -1 || state =='null')
			{
				state = JSON.parse(state);
			}
		}
		if(typeof state.state !== 'object' || !state.state.view)
		{
			state.state = {view: 'week'};
		}
		if(!state.state.date)
		{
			state.state.date = new Date();
		}

		// Hide other views
		for(var _view in app.classes.calendar.views)
		{
			if(state.state.view != _view && app.classes.calendar.views[_view])
			{
				for(var i = 0; i < app.classes.calendar.views[_view].etemplates.length; i++)
				{
					if(typeof app.classes.calendar.views[_view].etemplates[i] !== 'string')
					{
						$j(app.classes.calendar.views[_view].etemplates[i].DOMContainer).hide();
					}
				}
			}
		}
		if(this.sidebox_et2)
		{
			$j(this.sidebox_et2.getInstanceManager().DOMContainer).hide();
		}

		// Check for a supported client-side view
		if(app.classes.calendar.views[state.state.view] &&
			// Check that the view is instanciated
			typeof app.classes.calendar.views[state.state.view].etemplates[0] !== 'string' && app.classes.calendar.views[state.state.view].etemplates[0].widgetContainer
		)
		{
			// Doing an update - this includes the selected view, and the sidebox
			// We set a flag to ignore changes from the sidebox which would
			// cause infinite loops.
			this.state_update_in_progress = true;

			var view = app.classes.calendar.views[state.state.view];

			// Sanitize owner so it's always an array
			if(state.state.owner === null)
			{
				state.state.owner = undefined;
			}
			switch(typeof state.state.owner)
			{
				case 'undefined':
					state.state.owner = [this.egw.user('account_id')];
					break;
				case 'string':
					state.state.owner = state.state.owner.split(',');
					break;
				case 'number':
					state.state.owner = [state.state.owner];
					break;
				case 'object':
					// An array-like Object or an Array?
					if(!state.state.owner.filter)
					{
						state.state.owner = jQuery.map(state.state.owner, function(owner) {return owner;});
					}
			}
			// Keep sort order
			if(typeof this.state.owner === 'object')
			{
				var owner = [];
				this.state.owner.forEach(function(key) {
					var found = false;
					state.state.owner = state.state.owner.filter(function(item) {
						if(!found && item == key) {
							owner.push(item);
							found = true;
							return false;
						} else
							return true;
					});
				});
				// Add in any new owners
				state.state.owner = owner.concat(state.state.owner);
			}


			// Show the correct number of grids
			var grid_count = state.state.view === 'weekN' ? parseInt(this.egw.preference('multiple_weeks','calendar')) || 3 :
				state.state.view === 'month' ? 0 : // Calculate based on weeks in the month
				state.state.owner.length > (this.egw.config('calview_no_consolidate','phpgwapi') || 5) ? 1 : state.state.owner.length;

			var grid = view.etemplates[0].widgetContainer.getWidgetById('view');

			/*
			If the count is different, we need to have the correct number (just remove all & re-create)
			If the count is > 1, it's either because there are multiple date spans (weekN, month) and we need the correct span
			per row, or there are multiple owners and we need the correct owner per row.
			*/
			if(grid && (grid_count !== grid._children.length || grid_count > 1))
			{
				// Need to redo the number of grids
				var value = [];
				state.state.first = view.start_date(state.state).toJSON();
				// We'll modify this one, so it needs to be a new object
				var date = new Date(state.state.first);

				// Determine the different end date
				switch(state.state.view)
				{
					case 'month':
						var end = state.state.last = view.end_date(state.state);
						grid_count = Math.ceil((end - date) / (1000 * 60 * 60 * 24) / 7);
						// fall through
					case 'weekN':
						for(var week = 0; week < grid_count; week++)
						{
							var val = {
								id: ""+date.getUTCFullYear() + sprintf("%02d",date.getUTCMonth()) + sprintf("%02d",date.getUTCDate()),
								start_date: new Date(date),
								end_date: new Date(date),
								owner: state.state.owner
							};
							val.end_date.setUTCHours(24*7-1);
							value.push(val);
							date.setUTCHours(24*7);
						}
						state.state.last=val.end_date;
						break;
					default:
						var end = state.state.last = view.end_date(state.state);
						for(var owner = 0; owner < grid_count && owner < state.state.owner.length; owner++)
						{
							value.push({
								id: ""+date.getUTCFullYear() + sprintf("%02d",date.getUTCMonth()) + sprintf("%02d",date.getUTCDate()),
								start_date: date,
								end_date: end,
								owner: grid_count > 1 ? state.state.owner[owner] || 0 : state.state.owner
							});
						}
						break;
				}
				state.state.last = state.state.last.toJSON()
				// If we have cached data for the timespan, pass it along
				this._need_data(value,state.state);
				if(grid)
				{
					grid.set_value(
						{content: value}
					);

					// Weekend needs to be done seperately
					grid.iterateOver(function(widget) {
						if(widget.set_show_weekend)
						{
							widget.set_show_weekend(view.show_weekend(state.state));
						}
					},this, et2_valueWidget);

					// Granularity needs to be done seperately
					grid.iterateOver(function(widget) {
						if(widget.set_granularity)
						{
							widget.set_granularity(view.granularity(state.state));
						}
					},this, et2_valueWidget);
				}
			}
			else
			{
				// Simple, easy case - just one widget for the selected time span.
				// Update existing view's special attribute filters, defined in the view list
				for(var updater in view)
				{
					if(typeof view[updater] === 'function')
					{
						var value = view[updater].call(this,state.state);
						if(updater === 'start_date') state.state.first = this.date.toString(value);
						if(updater === 'end_date') state.state.last = this.date.toString(value);

						// Set value
						for(var i = 0; i < view.etemplates.length; i++)
						{
							view.etemplates[i].widgetContainer.iterateOver(function(widget) {
								if(typeof widget['set_'+updater] === 'function')
								{
									widget['set_'+updater](value);
								}
							}, this, et2_valueWidget);
						}
					}
				}
				var value = [{start_date: state.state.first, end_date: state.state.last}];
				this._need_data(value,state.state);
			}
			// Include first & last dates in state, mostly for server side processing
			if(state.state.first && state.state.first.toJSON) state.state.first = state.state.first.toJSON();
			if(state.state.last && state.state.last.toJSON) state.state.last = state.state.last.toJSON();

			// Show the templates for the current view
			for(var i = 0; i < view.etemplates.length; i++)
			{
				$j(view.etemplates[i].DOMContainer).show();
			}
			// Toggle todos
			if(state.state.view == 'day')
			{
				if(state.state.owner.length === 1 && !isNaN(state.state.owner) && state.state.owner[0] > 0)
				{
					view.etemplates[0].widgetContainer.set_width("70%");
					// TODO: Maybe some caching here
					this.egw.jsonq('calendar_uiviews::ajax_get_todos', [state.state.date, state.state.owner[0]], function(data) {
						this.getWidgetById('label').set_value(data.label||'');
						this.getWidgetById('todos').set_value({content:data.todos||''});
					},view.etemplates[1].widgetContainer);
				}
				else
				{
					$j(view.etemplates[1].DOMContainer).hide();
					view.etemplates[0].widgetContainer.set_width("");
				}
			}
			else
			{
				view.etemplates[0].widgetContainer.set_width("");
			}
			this.state = jQuery.extend({},state.state);

			var formatDate = new Date(this.state.date);
			formatDate = new Date(formatDate.valueOf() + formatDate.getTimezoneOffset() * 60 * 1000);
			egw_app_header(view.header(state.state),'calendar');

			// List view (nextmatch) has slightly different fields
			if(state.state.view === 'listview')
			{
				state.state.startdate = state.state.date;
				state.state.col_filter = {participant: state.state.owner};

				// Pass status filter in as status filter, avoids conflicts with nm filter
				state.state.status_filter = state.state.filter;
				delete state.state.filter;

				var nm = view.etemplates[0].widgetContainer.getWidgetById('nm');
				nm.applyFilters(state.state);
			}

			/* Update re-orderable calendars */
			this._sortable();

			/* Update sidebox widgets to show current value*/
			if(this.sidebox_et2)
			{
				this.sidebox_et2.iterateOver(function(widget) {
					if(widget.id == 'view')
					{
						// View widget has a list of state settings, which require special handling
						for(var i = 0; i < widget.options.select_options.length; i++)
						{
							var option_state = JSON.parse(widget.options.select_options[i].value) || [];
							var match = true;
							for(var os_key in option_state)
							{
								// Sometimes an optional state variable is not yet defined (sortby, days, etc)
								match = match && (option_state[os_key] == this.state[os_key] || typeof this.state[os_key] == 'undefined');
							}
							if(match)
							{
								widget.set_value(widget.options.select_options[i].value);
								return;
							}
						}
					}
					else if(typeof state.state[widget.id] !== 'undefined' && state.state[widget.id] != widget.getValue())
					{
						// Update widget.  This may trigger an infinite loop of
						// updates, so we do it after changing this.state and set a flag
						widget.set_value(state.state[widget.id]);
					}
				},this,et2_valueWidget);
			}

			// If current state matches a favorite, hightlight it
			this.highlight_favorite();

			// Sidebox is updated, we can clear the flag
			this.state_update_in_progress = false;

			// Update saved state in preferences
			var save = {};
			for(var i = 0; i < this.states_to_save.length; i++)
			{
				save[this.states_to_save[i]] = this.state[this.states_to_save[i]];
			}
			egw.set_preference('calendar','saved_states', save);

			return;
		}
		// old calendar state handling on server-side (incl. switching to and from listview)
		var menuaction = 'calendar.calendar_uiviews.index';
		if (typeof state.state != 'undefined' && (typeof state.state.view == 'undefined' || state.state.view == 'listview'))
		{
			if (state.name)
			{
				// 'blank' is the special name for no filters, send that instead of the nice translated name
				state.state.favorite = jQuery.isEmptyObject(state) || jQuery.isEmptyObject(state.state||state.filter) ? 'blank' : state.name.replace(/[^A-Za-z0-9-_]/g, '_');
				// set date for "No Filter" (blank) favorite to todays date
				if (state.state.favorite == 'blank')
					state.state.date = jQuery.datepicker.formatDate('yymmdd', new Date);
			}
			menuaction = 'calendar.calendar_uilist.listview';
			state.state.ajax = 'true';
			// check if we already use et2 / are in listview
			if (this.et2 || etemplate2 && etemplate2.getByApplication('calendar'))
			{
				// current calendar-code can set regular calendar states only via a server-request :(
				// --> check if we only need to set something which can be handeled by nm internally
				// or we need a redirect
				// ToDo: pass them via nm's get_rows call to server (eg. by passing state), so we dont need a redirect
				var current_state = this.getState();
				var need_redirect = false;
				for(var attr in current_state)
				{
					switch(attr)
					{
						case 'cat_id':
						case 'owner':
						case 'filter':
							if (state.state[attr] != current_state[attr])
							{
								need_redirect = true;
								// reset of attributes managed on server-side
								if (state.state.favorite === 'blank')
								{
									switch(attr)
									{
										case 'cat_id':
											state.state.cat_id = 0;
											break;
										case 'owner':
											state.state.owner = egw.user('account_id');
											break;
										case 'filter':
											state.state.filter = 'default';
											break;
									}
								}
								break;
							}
							break;

						case 'view':
							// "No filter" (blank) favorite: if not in listview --> stay in that view
							if (state.state.favorite === 'blank' && current_state.view != 'listview')
							{
								menuaction = 'calendar.calendar_uiviews.index';
								delete state.state.ajax;
								need_redirect = true;
							}
					}
				}
				if (!need_redirect)
				{
					return this._super.apply(this, [state]);
				}
			}
		}
		// setting internal state now, that linkHandler does not intercept switching from listview to any old view
		this.state = jQuery.extend({},state.state);
		if(this.sidebox_et2)
		{
			$j(this.sidebox_et2.getInstanceManager().DOMContainer).show();
		}

		var query = jQuery.extend({menuaction: menuaction},state.state||{});

		// prepend an owner 0, to reset all owners and not just set given resource type
		if(typeof query.owner != 'undefined')
		{
			query.owner = '0,'+ query.owner;
		}

		this.egw.open_link(this.egw.link('/index.php',query), 'calendar');

		// Stop the normal bubbling if this is called on click
		return false;
	},

	/**
	 * Check to see if any of the selected is an event widget
	 * Used to separate grid actions from event actions
	 *
	 * @param {egwAction} _action
	 * @param {egwActioObject[]} _selected
	 * @returns {boolean} Is any of the selected an event widget
	 */
	is_event: function(_action, _selected)
	{
		var is_widget = false;
		for(var i = 0; i < _selected.length; i++)
		{
			if(_selected[i].iface.getWidget() && _selected[i].iface.getWidget().instanceOf(et2_calendar_event))
			{
				is_widget = true;
			}

			// Also check classes, usually indicating permission
			if(_action.data && _action.data.enableClass)
			{
				is_widget = is_widget && ($j( _selected[i].iface.getDOMNode()).hasClass(_action.data.enableClass));
			}
			if(_action.data && _action.data.disableClass)
			{
				is_widget = is_widget && !($j( _selected[i].iface.getDOMNode()).hasClass(_action.data.disableClass));
			}

		}
		return is_widget;
	},

	/**
	 * Enable/Disable custom Date-time for set Alarm
	 *
	 * @param {egw object} _egw
	 * @param {widget object} _widget new_alarm[options] selectbox
	 */
	alarm_custom_date: function (_egw,_widget)
	{
		var alarm_date = this.et2.getWidgetById('new_alarm[date]');
		var alarm_options = _widget || this.et2.getWidgetById('new_alarm[options]');
		var start = this.et2.getWidgetById('start');

		if (alarm_date && alarm_options
					&& start)
		{
			if (alarm_options.get_value() != '0')
			{
				alarm_date.set_class('calendar_alarm_date_display');
			}
			else
			{
				alarm_date.set_class('');
			}
			var startDate = typeof start.get_value != 'undefined'?start.get_value():start.value;
			if (startDate)
			{
				var date = new Date(startDate);
				date.setTime(date.getTime() - 1000 * parseInt(alarm_options.get_value()));
				alarm_date.set_value(date);
			}
		}
	},

	/**
	 * Set alarm options based on WD/Regular event user preferences
	 * Gets fired by wholeday checkbox
	 *
	 * @param {egw object} _egw
	 * @param {widget object} _widget whole_day checkbox
	 */
	set_alarmOptions_WD: function (_egw,_widget)
	{
		var alarm = this.et2.getWidgetById('alarm');
		if (!alarm) return;	// no default alarm
		var content = this.et2.getArrayMgr('content').data;
		var start = this.et2.getWidgetById('start');
		var self= this;
		var time = alarm.cells[1][0].widget;
		var event = alarm.cells[1][1].widget;
		// Convert a seconds of time to a translated label
		var _secs_to_label = function (_secs)
		{
			var label='';
			if (_secs <= 3600)
			{
				label = self.egw.lang('%1 minutes', _secs/60);
			}
			else if(_secs <= 86400)
			{
				label = self.egw.lang('%1 hours', _secs/3600);
			}
			return label;
		};
		if (typeof content['alarm'][1]['default'] == 'undefined')
		{
			// user deleted alarm --> nothing to do
		}
		else
		{
			var def_alarm = this.egw.preference(_widget.get_value() === "true" ?
				'default-alarm-wholeday' : 'default-alarm', 'calendar');
			if (!def_alarm && def_alarm !== 0)	// no alarm
			{
				jQuery('#calendar-edit_alarm > tbody :nth-child(1)').hide();
			}
			else
			{
				jQuery('#calendar-edit_alarm > tbody :nth-child(1)').show();
				start.set_hours(0);
				start.set_minutes(0);
				time.set_value(start.get_value());
				time.set_value('-'+(60 * def_alarm));
				event.set_value(_secs_to_label(60 * def_alarm));
			}
		}
	},

	/**
	 * Take the date range(s) in the value and decide if we need to fetch data
	 * for the date ranges, or if they're already cached fill them in.
	 *
	 * @param {
	 */
	_need_data: function(value, state)
	{
		var need_data = false;

		// Determine if we're showing multiple owners seperate or consolidated
		var seperate_owners = false;
		var last_owner = value.length ? value[0].owner || 0 : 0;
		for(var i = 0; i < value.length && !seperate_owners; i++)
		{
			seperate_owners = seperate_owners || (last_owner !== value[i].owner)
		}

		for(var i = 0; i < value.length; i++)
		{
			var t = new Date(value[i].start_date);
			var end = new Date(value[i].end_date);
			do
			{
				// Cache is by date (and owner, if seperate)
				var date = t.getUTCFullYear() + sprintf('%02d',t.getUTCMonth()+1) + sprintf('%02d',t.getUTCDate());
				var cache_id = app.classes.calendar._daywise_cache_id(date, seperate_owners ? value[i].owner : state.owner||false);

				if(egw.dataHasUID(cache_id))
				{
					var c = egw.dataGetUIDdata(cache_id);
					if(c.data && c.data !== null)
					{
						// There is data, pass it along now
						value[i][date] = [];
						for(var j = 0; j < c.data.length; j++)
						{
							if(egw.dataHasUID('calendar::'+c.data[j]))
							{
								value[i][date].push(egw.dataGetUIDdata('calendar::'+c.data[j]).data);
							}
							else
							{
								need_data = true;
							}
						}
					}
					else
					{
						need_data = true;
						// Assume it's empty, if there is data it will be filled later
						egw.dataStoreUID(cache_id, []);
					}
				}
				else
				{
					need_data = true;
					// Assume it's empty, if there is data it will be filled later
					egw.dataStoreUID(cache_id, []);
				}
				t.setUTCDate(t.getUTCDate() + 1);
			}
			while(t < end);

			// Some data is missing for the current owner, go get it
			if(need_data && seperate_owners)
			{
				this._fetch_data(jQuery.extend({}, state, {owner: value[i].owner}));
			}
		}

		// Some data was missing, go get it
		if(need_data && !seperate_owners)
		{
			this._fetch_data(state);
		}
	},

	/**
	 * Use the egw.data system to get data from the calendar list for the
	 * selected time span.
	 *
	 * As long as the other filters are the same (category, owner, status) we
	 * cache the data.
	 *
	 * @param {Object} state
	 * @param {etemplate2} [instance] If the full calendar app isn't loaded
	 *	(home app), pass a different instance to use it to get the data
	 * @param {number} [start] Result offset.  Internal use only
	 */
	_fetch_data: function(state, instance, start)
	{
		if(!this.sidebox_et2 && !instance) return;

		if(typeof start === 'undefined')
		{
			start = 0;
		}

		var query = jQuery.extend({}, {
			get_rows: 'calendar.calendar_uilist.get_rows',
			row_id:'row_id',
			startdate:state.first ||  state.date,
			enddate:state.last,
			// Participant must be an array or it won't work
			col_filter: {participant: (typeof state.owner == 'string' || typeof state.owner == 'number' ? [state.owner] : state.owner)},
			filter:'custom', // Must be custom to get start & end dates
			status_filter: state.filter,
			cat_id: state.cat_id,
			search: state.keywords
		});
		// Show ajax loader
		framework.applications.calendar.sidemenuEntry.showAjaxLoader()

		this.egw.dataFetch(
			instance ? instance.etemplate_exec_id :
				this.sidebox_et2.getInstanceManager().etemplate_exec_id,
			{start: start, num_rows:200},
			query,
			this.id,
			function(data) {
				console.log(data);
				var updated_days = {};
				for(var i = 0; i < data.order.length && data.total; i++)
				{
					var record = this.egw.dataGetUIDdata(data.order[i]);
					if(record && record.data)
					{
						if(typeof updated_days[record.data.date] === 'undefined')
						{
							updated_days[record.data.date] = [];
						}
						// Copy, to avoid unwanted changes by reference
						updated_days[record.data.date].push(record.data.row_id);

						// Check for multi-day events listed once
						// Date must stay a string or we might cause problems with nextmatch
						var dates = {
							start: typeof record.data.start === 'string' ? record.data.start : record.data.start.toJSON(),
							end: typeof record.data.end === 'string' ? record.data.end : record.data.end.toJSON(),
						};
						if(dates.start.substr(0,10) !== dates.end.substr(0,10))
						{
							var end = new Date(record.data.end);
							var t = new Date(record.data.start);

							do
							{
								var expanded_date = ''+t.getUTCFullYear() + sprintf('%02d',t.getUTCMonth()+1) + sprintf('%02d',t.getDate());
								if(typeof(updated_days[expanded_date]) === 'undefined')
								{
									updated_days[expanded_date] = [];
								}
								if(record.data.date !== expanded_date)
								{
									// Copy, to avoid unwanted changes by reference
									updated_days[expanded_date].push(record.data.row_id);
								}
								t.setUTCDate(t.getUTCDate() + 1);
							}
							while(end >= t)
						}
					}
				}
				for(var day in updated_days)
				{
					this.egw.dataStoreUID(app.classes.calendar._daywise_cache_id(day, state.owner), updated_days[day]);
				}

				// More rows?
				if(data.order.length + start < data.total)
				{
					// Wait a bit, let UI do something.
					window.setTimeout( function() {
						app.calendar._fetch_data(state, instance, start + data.order.length);
					}, 100);
				}

				// Hide AJAX loader
				framework.applications.calendar.sidemenuEntry.hideAjaxLoader();
			}, this,null
		);
	},

	/**
	 * Some handy date calculations
	 * All take either a Date object or full date with timestamp (Z)
	 */
	date: {
		toString: function(date)
		{
			// Ensure consistent formatting using UTC, avoids problems with comparison
			// and timezones
			if(typeof date === 'string') date = new Date(date);
			return date.getUTCFullYear() +'-'+
				sprintf("%02d",date.getUTCMonth()+1) + '-'+
				sprintf("%02d",date.getUTCDate()) + 'T'+
				sprintf("%02d",date.getUTCHours()) + ':'+
				sprintf("%02d",date.getUTCMinutes()) + ':'+
				sprintf("%02d",date.getUTCSeconds()) + 'Z';
		},

		/**
		* Formats one or two dates (range) as long date (full monthname), optionaly with a time
		*
		* Take care of any timezone issues before you pass the dates in.
		*
		* @param {Date} first first date
		* @param {Date} last=0 last date for range, or false for a single date
		* @param {boolean} display_time=false should a time be displayed too
		* @param {boolean} display_day=false should a day-name prefix the date, eg. monday June 20, 2006
		* @return string with formatted date
		*/
		long_date: function(first, last, display_time, display_day)
		{
			if(!first) return '';
			if(typeof first === 'string')
			{
				first = new Date(first);
			}
			if(typeof last == 'string' && last)
			{
				last = new Date(last);
			}
			if(!last || typeof last !== 'object')
			{
				 last = false;
			}

			if(!display_time) display_time = false;
			if(!display_day) display_day = false;

			var range = '';

			var datefmt = egw.preference('dateformat');
			var timefmt = egw.preference('timeformat') == 12 ? 'h:i a' : 'H:i';

			var month_before_day = datefmt[0].toLowerCase() == 'm' ||
				datefmt[2].toLowerCase() == 'm' && datefmt[4] == 'd';

			if (display_day)
			{
				range = jQuery.datepicker.formatDate('DD',first)+(datefmt[0] != 'd' ? ' ' : ', ');
			}
			for (var i = 0; i < 5; i += 2)
			{
				 switch(datefmt[i])
				 {
					 case 'd':
						 range += first.getUTCDate()+ (datefmt[1] == '.' ? '.' : '');
						 if (last && (first.getUTCMonth() != last.getUTCMonth() || first.getFullYear() != last.getFullYear()))
						 {
							 if (!month_before_day)
							 {
								 range += jQuery.datepicker.formatDate('MM',first);
							 }
							 if (first.getFullYear() != last.getFullYear() && datefmt[0] != 'Y')
							 {
								 range += (datefmt[0] != 'd' ? ', ' : ' ') . first.getFullYear();
							 }
							 if (display_time)
							 {
								 range += ' '+jQuery.datepicker.formatDate(dateTimeFormat(timefmt),first);
							 }
							 if (!last)
							 {
								 return range;
							 }
							 range += ' - ';

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

							 if (month_before_day)
							 {
								 range += jQuery.datepicker.formatDate('MM',last);
							 }
						 }
						 else
						 {
							 if (display_time)
							 {
								 range += ' '+jQuery.datepicker.formatDate(dateTimeFormat(timefmt),last);
							 }
							 if(last)
							 {
								 range += ' - ';
							 }
						 }
						 if(last)
						 {
							 range += ' ' + last.getUTCDate() + (datefmt[1] == '.' ? '.' : '');
						 }
						 break;
					 case 'm':
					 case 'M':
						 range += ' '+jQuery.datepicker.formatDate('MM',month_before_day ? first : last) + ' ';
						 break;
					 case 'Y':
						 if (datefmt[0] != 'm')
						 {
							 range += ' ' + (datefmt[0] == 'Y' ? first.getFullYear()+(datefmt[2] == 'd' ? ', ' : ' ') : last.getFullYear()+' ');
						 }
						 break;
				 }
			}
			if (display_time && last)
			{
				 range += ' '+jQuery.datepicker.formatDate(dateTimeFormat(timefmt),last);
			}
			if (datefmt[4] == 'Y' && datefmt[0] == 'm')
			{
				 range += ', ' + last.getFullYear();
			}
			return range;
		},
		/**
		* Calculate iso8601 week-number, which is defined for Monday as first day of week only
		*
		* We adjust the day, if user prefs want a different week-start-day
		*
		* @param string|Date date
		* @return string
		*/
		week_number: function(_date)
		{
			var d = new Date(_date);
			var day = d.getUTCDay();


			// if week does not start Monday and date is Sunday --> add one day
			if (egw.preference('weekdaystarts','calendar') != 'Monday' && !day)
			{
				d.setUTCDate(d.getUTCDate() + 1);
			}
			// if week does start Saturday and $time is Saturday --> add two days
			else if (egw.preference('weekdaystarts','calendar') == 'Saturday' && day == 6)
			{
				d.setUTCDate(d.getUTCDate() + 2);
			}

			return jQuery.datepicker.iso8601Week(new Date(d.valueOf() + d.getTimezoneOffset() * 60 * 1000));
		},
		start_of_week: function(date)
		{
			var d = new Date(date);
			var day = d.getUTCDay();
			var diff = 0;
			switch(egw.preference('weekdaystarts','calendar'))
			{
				case 'Saturday':
					diff = day === 6 ? 0 : day === 0 ? -1 : -(day + 1);
					break;
				case 'Monday':
					diff = day === 0 ? 1 : 1-day;
					break;
				case 'Sunday':
				default:
					diff = -day;
			}
			d.setUTCDate(d.getUTCDate() + diff);
			return d;
		},
		end_of_week: function(date)
		{
			var d = app.calendar.date.start_of_week(date);
			d.setUTCDate(d.getUTCDate() + 6);
			return d;
		}
	},

	/**
	 * Initializes actions and handlers on sidebox (delete)
	 * Extended from parent to automatically add change handlers for resource
	 * menu items.
	 *
	 * @param {jQuery} sidebox jQuery of DOM node
	 */
	_init_sidebox: function(sidebox)
	{
		if( this._super.apply(this, arguments) )
		{
			sidebox.parentsUntil('#calendar_sidebox_content')
				.find('.egw_fw_ui_category_content').not(sidebox.parent())
				.on('change.sidebox', 'select:not(.et2_selectbox),input', this, function(event) {
					var state = {};

					// Here we look for things like owner: ['r1,r2'] and change them
					// to owner: ['r1','r2']
					state[this.name.replace('[]','')] = $j(this).val();
					$j('option', this).removeAttr('selected');
					for(var key in state)
					{
						if(state[key] && typeof state[key].length !== 'undefined')
						{
							for(var sub_key in state[key])
							{
								if(typeof state[key][sub_key] == 'string' && state[key][sub_key].indexOf(',') !== -1)
								{
									var explode_me = state[key][sub_key];
									delete state[key][sub_key];
									jQuery.extend(state[key], explode_me.split(','));
								}
							}
						}
					}
					app.calendar.update_state(state);
				});
		}
	},

	/**
	 * The sidebox filters use some non-standard and not-exposed options.  They
	 * are set up here.
	 *
	 */
	_setup_sidebox_filters: function()
	{
		// Further date customizations
		var date = this.sidebox_et2.getWidgetById('date');
		if(date)
		{
			date.input_date.datepicker("option", {
				showButtonPanel:	true,
				onChangeMonthYear:	function(year, month, inst)
				{
					// Switch to month view for that month
					var date = new Date(app.calendar.state.date);
					date.setUTCDate(1);
					date.setFullYear(year);
					date.setUTCMonth(month-1);
					var state = {date: date};
					if(app.calendar.sidebox_changes_views.indexOf(app.calendar.state.view) >= 0)
					{
						state.view = 'month';
					}
					else if (app.calendar.state.view == 'planner')
					{
						state.planner_days = 0;
						state.last = false;
					}
					app.calendar.update_state(state);
				},
				// Mark holidays
				beforeShowDay: function (date)
				{
					var holidays = et2_calendar_daycol.get_holidays({day_class_holiday: function() {}}, date.getFullYear());
					var day_holidays = holidays[''+date.getUTCFullYear() +
						sprintf("%02d",date.getUTCMonth()+1) +
						sprintf("%02d",date.getUTCDate())];
					var css_class = '';
					var tooltip = '';
					if(typeof day_holidays !== 'undefined' && day_holidays.length)
					{
						for(var i = 0; i < day_holidays.length; i++)
						{
							if (typeof day_holidays[i]['birthyear'] !== 'undefined')
							{
								css_class +='calendar_calBirthday ';
							}
							else
							{
								css_class += 'calendar_calHoliday ';
							}
							tooltip += day_holidays[i]['name'] + "\n";
						}
					}
					return [true, css_class, tooltip];
				}
			});

			// Clickable week numbers
			date.input_date.on('mouseenter','.ui-datepicker-week-col', function() {
					$j(this).siblings().find('a').addClass('ui-state-hover');
				})
				.on('mouseleave','.ui-datepicker-week-col', function() {
					$j(this).siblings().find('a').removeClass('ui-state-hover');
				})
				.on('click', '.ui-datepicker-week-col', function() {
					var view = app.calendar.state.view;

					// Fake a click event on the first day to get the updated date
					$j(this).next().click();

					// Set to week view, if in one of the views where we change view
					if(app.calendar.sidebox_changes_views.indexOf(view) >= 0)
					{
						app.calendar.update_state({view: 'week', date: date.getValue()});
					}
					else if (app.calendar.state.view == 'planner')
					{
						// Clicked a week, show just a week
						app.calendar.update_state({planner_days: 7});
					}
				});
		}
	},

	/**
	 * Record view templates so we can quickly switch between them.
	 *
	 * @param {etemplate2} _et2 etemplate2 template that was just loaded
	 * @param {String} _name Name of the template
	 */
	_et2_view_init: function(_et2, _name)
	{
		var hidden = typeof this.state.view !== 'undefined';
		var all_loaded = true;

		// Avoid home portlets using our templates, and get them right
		if(_et2.uniqueId.indexOf('portlet') === 0) return;

		// Flag to make sure we don't hide non-view templates
		var view_et2 = false;

		for(var view in app.classes.calendar.views)
		{
			var index = app.classes.calendar.views[view].etemplates.indexOf(_name);
			if(index > -1)
			{
				view_et2 = true;
				app.classes.calendar.views[view].etemplates[index] = _et2;
				// If a template disappears, we want to release it
				$j(_et2.DOMContainer).one('clear',jQuery.proxy(function() {
					this.view[index] = _name;
				},jQuery.extend({},{view: app.classes.calendar.views[view], index: ""+index, name: _name})));

				if(this.state.view === view)
				{
					hidden = false;
				}
			}
			app.classes.calendar.views[view].etemplates.forEach(function(et) {all_loaded = all_loaded && typeof et !== 'string';});
		}

		// Start hidden, except for current view
		if(view_et2)
		{
			if(hidden)
			{
				$j(_et2.DOMContainer).hide();
			}
			if(all_loaded)
			{
				this.setState({state:this.state});
			}
		}
	},

	/**
	 * Super class for the different views.
	 *
	 * Each separate view overrides what it needs
	 */
	View: {
		// List of etemplates to show for this view
		etemplates: ['calendar.view'],

		/**
		 * Translated label for header
		 * @param {Object} state
		 * @returns {string}
		 */
		header: function(state) {
			var formatDate = new Date(state.date);
			formatDate = new Date(formatDate.valueOf() + formatDate.getTimezoneOffset() * 60 * 1000);
			return date(egw.preference('dateformat'),formatDate);
		},

		/**
		 * Get the start date for this view
		 * @param {Object} state
		 * @returns {Date}
		 */
		start_date: function(state) {
			var d = state.date ? new Date(state.date) : new Date();
			d.setUTCHours(0);
			d.setUTCMinutes(0);
			d.setUTCSeconds(0);
			d.setUTCMilliseconds(0);
			return d;
		},
		/**
		 * Get the end date for this view
		 * @param {Object} state
		 * @returns {Date}
		 */
		end_date: function(state) {
			var d = state.date ? new Date(state.date) : new Date();
			d.setUTCHours(23);
			d.setUTCMinutes(59);
			d.setUTCSeconds(59);
			d.setUTCMilliseconds(0);
			return d;
		},
		/**
		 * Get the owner for this view
		 *
		 * This is always the owner from the given state, we use a function
		 * to trigger setting the widget value.
		 *
		 * @param {number[]|String} state.owner List of owner IDs, or a comma seperated list
		 * @returns {number[]|String}
		 */
		owner: function(state) {
			return state.owner || 0;
		},
		/**
		 * Should the view show the weekends
		 *
		 * @returns {boolean} Current preference to show 5 or 7 days in weekview
		 */
		show_weekend: function(state)
		{
			return state.days ? parseInt(state.days) === 7 : parseInt(egw.preference('days_in_weekview','calendar')) == 7;
		},
		/**
		 * How big or small are the displayed time chunks?
		 * We automatically scale the user's preference based on how many rows / calendars are shown.
		 */
		granularity: function(state) {
			return Math.min(240,(state.owner.length <= (egw.config('calview_no_consolidate','phpgwapi') || 5) ? state.owner.length : 1)
				* (parseInt(egw.preference('interval','calendar')) || 30));
		},
		extend: function(sub)
		{
			return jQuery.extend({},this,{_super:this},sub);
		},
		/**
		 * Determines the new date after scrolling.  The default is 1 week.
		 *
		 * @param {number} delta Integer for how many 'ticks' to move, positive for
		 *	forward, negative for backward
		 * @returns {Date}
		 */
		scroll: function(delta)
		{
			var d = new Date(app.calendar.state.date);
			d.setUTCDate(d.getUTCDate() + (7 * delta));
			return d;
		}
	}
});


jQuery.extend(app.classes.calendar,{

	/**
	 * This is the data cache prefix for the daywise event index cache
	 * Daywise cache IDs look like: calendar_daywise::20150101 and
	 * contain a list of event IDs for that day (or empty array)
	 */
	DAYWISE_CACHE_ID: 'calendar_daywise',


	/**
	 * Create a cache ID for the daywise cache
	 *
	 * @param {String|Date} date
	 * @param {String|integer|String[]} owner
	 * @returns {String} Cache ID
	 */
	_daywise_cache_id: function(date, owner)
	{
		if(typeof date === 'object')
		{
			date =  date.getUTCFullYear() + sprintf('%02d',date.getUTCMonth()+1) + sprintf('%02d',date.getUTCDate());
		}

		// If the owner is not set, 0, or the current user, don't bother adding it
		var state_owner = app.calendar ? app.calendar.state.owner.toString() || '' : '';
		var _owner = (owner && owner.toString() != '0' && owner !== state_owner) ? owner.toString() : '';
		if(_owner == egw.user('account_id'))
		{
			_owner = '';
		}
		return app.classes.calendar.DAYWISE_CACHE_ID+'::'+date+(_owner ? '-' + _owner : '');
	},

	/**
	* Etemplates and settings for the different views.  Some (day view)
	* use more than one template, some use the same template as others,
	* most need different handling for their various attributes.
	*
	* Not using the standard Class.extend here because it hides the members,
	* and we want to be able to look inside them.  This is done seperately instead
	* of inside the normal object to allow access to the View object.
	*/
	views: {
		day: app.classes.calendar.prototype.View.extend({
			header: function(state) {
				return egw.lang('Day view') + ': ' + app.calendar.View.header.call(this, state);
			},
			etemplates: ['calendar.view','calendar.todo'],
			start_date: function(state) {
				var d = app.calendar.View.start_date.call(this, state);
				state.date = app.calendar.date.toString(d);
				return d;
			},
			show_weekend: function(state) {
				state.days = '1';

				return app.calendar.View.show_weekend.call(this,state);
			},
			scroll: function(delta)
			{
				var d = new Date(app.calendar.state.date);
				d.setUTCDate(d.getUTCDate() + (delta));
				return d;
			}
		}),
		day4: app.classes.calendar.prototype.View.extend({
			header: function(state) {
				return egw.lang('Four days view') + ': ' + app.calendar.View.header.call(this, state);
			},
			end_date: function(state) {
				var d = app.calendar.View.end_date.call(this,state);
				state.days = '4';
				d.setUTCHours(24*4-1);
				d.setUTCMinutes(59);
				d.setUTCSeconds(59);
				d.setUTCMilliseconds(0);
				return d;
			},
			show_weekend: function(state) {
				return true;
			},
			scroll: function(delta)
			{
				var d = new Date(app.calendar.state.date);
				d.setUTCDate(d.getUTCDate() + (4 * delta));
				return d;
			}
		}),
		week: app.classes.calendar.prototype.View.extend({
			header: function(state) {
				var formatDate = new Date(state.first);
				return egw.lang('Week view') + ': ' + egw.lang('Week') + ' ' +
					app.calendar.date.week_number(state.first) + ': ' +
					app.calendar.date.long_date(state.first, state.last)
			},
			start_date: function(state) {
				return app.calendar.date.start_of_week(app.calendar.View.start_date.call(this,state));
			},
			end_date: function(state) {
				var d = app.calendar.date.start_of_week(state.date || new Date());
				// Always 7 days, we just turn weekends on or off
				d.setUTCHours(24*7-1);
				d.setUTCMinutes(59);
				d.setUTCSeconds(59);
				d.setUTCMilliseconds(0);
				state.days = '' + (state.days >= 5 ? state.days : egw.preference('days_in_weekview','calendar') || 7);
				return d;
			},
			show_weekend: function(state)
			{
				return parseInt(state.days) === 7;
			}
		}),
		weekN: app.classes.calendar.prototype.View.extend({
			header: function(state) {
				return egw.lang('Week') + ' ' +
					app.calendar.date.week_number(state.first) + ' - ' +
					app.calendar.date.week_number(state.last) + ': ' +
					app.calendar.date.long_date(state.first, state.last)
			},
			start_date: function(state) {
				return app.calendar.date.start_of_week(state.date || new Date());
			},
			end_date: function(state) {
				state.days = '' + (state.days >= 5 ? state.days : egw.preference('days_in_weekview','calendar') || 7);

				var d = app.calendar.date.start_of_week(state.date || new Date());
				// Always 7 days, we just turn weekends on or off
				d.setUTCHours(24*7-1);
				return d;
			},
			granularity: function(state) {
				return  (parseInt(egw.preference('multiple_weeks','calendar')) || 3) * app.calendar.View.granularity.call(this, state);
			}
		}),
		month: app.classes.calendar.prototype.View.extend({
			header: function(state)
			{
				var formatDate = new Date(state.date);
				formatDate = new Date(formatDate.valueOf() + formatDate.getTimezoneOffset() * 60 * 1000);
				return egw.lang('Month view') + ':' + egw.lang(date('F',formatDate)) + ' ' + date('Y',formatDate);
			},
			start_date: function(state) {
				var d = app.calendar.View.start_date.call(this,state);
				d.setUTCDate(1);
				state.date = app.calendar.date.toString(d);
				return app.calendar.date.start_of_week(d);
			},
			end_date: function(state) {
				var d = app.calendar.View.end_date.call(this,state);
				d = new Date(d.getFullYear(),d.getUTCMonth() + 1, 0);
				var week_start = app.calendar.date.start_of_week(d);
				if(week_start < d) week_start.setUTCHours(24*7);
				week_start.setUTCHours(week_start.getUTCHours()-1);
				return week_start;
			},
			granularity: function(state) {
				return 120;
			},
			scroll: function(delta)
			{
				var d = new Date(app.calendar.state.date);
				d.setUTCMonth(d.getUTCMonth() + delta);
				return d;
			}
		}),

		planner: app.classes.calendar.prototype.View.extend({
			header: function(state) {
				var startDate = new Date(state.first);
				startDate = new Date(startDate.valueOf() + startDate.getTimezoneOffset() * 60 * 1000);

				var endDate = new Date(state.last);
				endDate = new Date(endDate.valueOf() + endDate.getTimezoneOffset() * 60 * 1000);
				return egw.lang('Planner view') + ': ' + date(egw.preference('dateformat'),startDate) +
					(startDate == endDate ? '' : ' - ' + date(egw.preference('dateformat'),endDate));
			},
			etemplates: ['calendar.planner'],
			group_by: function(state) {
				return state.cat_id? state.cat_id : (state.sortby ? state.sortby : 0);
			},
			start_date: function(state) {
				var d = app.calendar.View.start_date.call(this, state);
				if(state.sortby && state.sortby === 'month')
				{
					d.setUTCDate(1);
				}
				else if (!state.planner_days)
				{
					if(d.getUTCDate() < 15)
					{
						d.setUTCDate(1);
						return app.calendar.date.start_of_week(d);
					}
					else
					{
						return app.calendar.date.start_of_week(d);
					}
				}
				return d;
			},
			end_date: function(state) {
				var d = app.calendar.View.end_date.call(this, state);
				if(state.sortby && state.sortby === 'month')
				{
					d.setUTCDate(0);
					d.setUTCFullYear(d.getUTCFullYear() + 1);
				}
				else if (state.planner_days)
				{
					d.setUTCDate(d.getUTCDate() + parseInt(state.planner_days)-1);
				}
				else if (state.last)
				{
					d = new Date(state.last);
				}
				else if (!state.planner_days)
				{
					if (d.getUTCDate() < 15)
					{
						d.setUTCDate(0);
						d.setUTCMonth(d.getUTCMonth()+1);
						d = app.calendar.date.end_of_week(d);
					}
					else
					{
						d.setUTCMonth(d.getUTCMonth()+1);
						d = app.calendar.date.end_of_week(d);
					}
				}
				return d;
			},
			scroll: function(delta)
			{
				var d = new Date(app.calendar.state.date);

				// Yearly view, grouped by month - scroll 1 month
				if(app.calendar.state.sortby === 'month')
				{
					d.setUTCMonth(d.getUTCMonth() + delta)
					d.setUTCDate(1);
					d.setUTCHours(0);
					d.setUTCMinutes(0);
					return d;
				}
				// Need to set the day count, or auto date ranging takes over and
				// makes things buggy
				if(app.calendar.state.first && app.calendar.state.last)
				{
					var diff = new Date(app.calendar.state.last)  - new Date(app.calendar.state.first);
					app.calendar.state.planner_days = Math.round(diff / (1000*3600*24));
				}
				d.setUTCDate(d.getUTCDate() + (app.calendar.state.planner_days*delta));
				if(app.calendar.state.planner_days > 8)
				{
					d = app.calendar.date.start_of_week(d);
				}
				return d;
			}
		}),

		listview: app.classes.calendar.prototype.View.extend({
			header: function() {return egw.lang('List view');},
			etemplates: ['calendar.list']
		})
	}}
);