/**
 * ImportPanel.js zarafa calender to ics im/exporter
 *
 * Author: Christoph Haas <christoph.h@sprinternet.at>
 * Copyright (C) 2012-2013 Christoph Haas
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *	
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/**
 * ImportPanel
 *
 * The main Panel of the calendarimporter plugin.
 */
Ext.namespace("Zarafa.plugins.calendarimporter.dialogs"); 

/**
 * @class Zarafa.plugins.calendarimporter.dialogs.ImportPanel
 * @extends Ext.form.FormPanel
 */
Zarafa.plugins.calendarimporter.dialogs.ImportPanel = Ext.extend(Ext.Panel, {

	/* store the imported timezone here... */
	timezone: null,
	
	/* ignore daylight saving time... */
	ignoredst: null,
	
	/* path to ics file on server... */
	icsfile: null,
	
	/* loadmask for timezone/dst changes... */
	loadMask: null,
	
	/* export event buffer */
	exportResponse: new Array(),
	
	/* how many requests are still running? */
	runningRequests: null,
	
	/* The store for the selection grid */
	store: null,
	
	/**
	 * The internal 'iframe' which is hidden from the user, which is used for downloading
	 * attachments. See {@link #doOpen}.
	 * @property
	 * @type Ext.Element
	 */
	downloadFrame : undefined,

	/**
	 * @constructor
	 * @param {object} config
	 */
	constructor : function (config) {
		config = config || {};
		var self = this;
		this.timezone = container.getSettingsModel().get("zarafa/v1/plugins/calendarimporter/default_timezone");
		
		if(typeof config.filename !== "undefined") {
			this.icsfile = config.filename;
		}
		
		// create the data store
		this.store = new Ext.data.ArrayStore({
			fields: [
				{name: 'title'},
				{name: 'start'},
				{name: 'end'},
				{name: 'location'},
				{name: 'description'},
				{name: 'priority'},
				{name: 'label'},
				{name: 'busy'},
				{name: 'privatestate'},
				{name: 'organizer'},
				{name: 'trigger'}
			]
		});
		
		Ext.apply(config, {
			xtype     : 'calendarimporter.importpanel',
			ref		  : "importpanel",
			id		  : "importpanel",
			layout    : {
				type  : 'form',
				align : 'stretch'
			},
			anchor	  : '100%',
			bodyStyle : 'background-color: inherit;',
			defaults  : {
				border      : true,
				bodyStyle   : 'background-color: inherit; padding: 3px 0px 3px 0px; border-style: none none solid none;'
			},
			items : [
				this.createSelectBox(),
				this.createTimezoneBox(),
				this.createDaylightSavingCheckBox(),
				this.initForm(),
				this.createGrid()
			],
			buttons: [
				this.createExportAllButton(),
				this.createSubmitAllButton(),
				this.createSubmitButton(),
				this.createCancelButton()
			], 
			listeners: {
				afterrender: function (cmp) {
					Ext.getCmp('importbutton').disable();
					this.loadMask = new Ext.LoadMask(Ext.getCmp("importpanel").getEl(), {msg:'Loading...'});
					
					if(this.icsfile != null) { // if we have got the filename from an attachment
						this.parseCalendar(this.icsfile, this.timezone, this.ignoredst);
					}
				},
				close: function (cmp) {
					Ext.getCmp('importbutton').enable();
				},
				hide: function (cmp) {
					Ext.getCmp('importbutton').enable();
				},
				destroy: function (cmp) {
					Ext.getCmp('importbutton').enable();
				}
			}
		});
		
		Zarafa.plugins.calendarimporter.dialogs.ImportPanel.superclass.constructor.call(this, config);
	},

	/**
	 * Init embedded form, this is the form that is
	 * posted and contains the attachments
	 * @private
	 */
	initForm : function () {
		return {
			xtype: 'form',
			ref: 'addFormPanel',
			layout : 'column',
			fileUpload: true,
			autoWidth: true,
			autoHeight: true,
			border: false,
			bodyStyle: 'padding: 5px;',
			defaults: {
				anchor: '95%',
				border: false,
				bodyStyle: 'padding: 5px;'
			},
			items: [this.createUploadField()]
		};
	},

	/**
	 * Reloads the data of the grid
	 * @private
	 */
	reloadGridStore: function(eventdata) {
		var parsedData = [];
		
		// this is done to get rid of the local browser timezone....
		// because all timezone specific stuff is done via php
		var local_tz_offset = new Date().getTimezoneOffset() * 60000;  // getTimezoneOffset returns minutes... we need milliseconds
		
		
		if(eventdata !== null) {
			parsedData = new Array(eventdata.events.length);
			var i = 0;
			for(i = 0; i < eventdata.events.length; i++) {
				var trigger = null;
				
				if(eventdata.events[i]["VALARM"]) {
					trigger = eventdata.events[i]["VALARM"]["TRIGGER"];
					trigger = new Date(parseInt(trigger) + local_tz_offset);
				}
				parsedData[i] = new Array(eventdata.events[i]["SUMMARY"], new Date(parseInt(eventdata.events[i]["DTSTART"]) + local_tz_offset), new Date(parseInt(eventdata.events[i]["DTEND"]) + local_tz_offset), eventdata.events[i]["LOCATION"], eventdata.events[i]["DESCRIPTION"],eventdata.events[i]["PRIORITY"],eventdata.events[i]["X-ZARAFA-LABEL"],eventdata.events[i]["X-MICROSOFT-CDO-BUSYSTATUS"],eventdata.events[i]["CLASS"],eventdata.events[i]["ORGANIZER"],trigger);
			}
		} else {
			return null;
		}

		this.store.loadData(parsedData, false);
	},
	
	/**
	 * Init embedded form, this is the form that is
	 * posted and contains the attachments
	 * @private
	 */
	createGrid : function() {
		return {
			xtype: 'grid',
			ref: 'eventgrid',
			id: 'eventgrid',
			columnWidth: 1.0,
			store: this.store,
			width: '100%',
			height: 300,
			title: 'Select events to import',
			frame: false,
			viewConfig:{
				forceFit:true
			},
			colModel: new Ext.grid.ColumnModel({
				defaults: {
					width: 300,
					sortable: true
				},
				columns: [
					{id: 'Summary', header: 'Title', width: 200, sortable: true, dataIndex: 'title'},
					{header: 'Start', width: 200, sortable: true, dataIndex: 'start', renderer : Zarafa.common.ui.grid.Renderers.datetime},
					{header: 'End', width: 200, sortable: true, dataIndex: 'end', renderer : Zarafa.common.ui.grid.Renderers.datetime},
					{header: 'Location', width: 150, sortable: true, dataIndex: 'location'},
					{header: 'Description', sortable: true, dataIndex: 'description'},
					{header: "Priority", dataIndex: 'priority', hidden: true},
					{header: "Label", dataIndex: 'label', hidden: true},
					{header: "Busystatus", dataIndex: 'busy', hidden: true},
					{header: "Privacystatus", dataIndex: 'privatestate', hidden: true},
					{header: "Organizer", dataIndex: 'organizer', hidden: true},
					{header: "Alarm", dataIndex: 'trigger', hidden: true, renderer : Zarafa.common.ui.grid.Renderers.datetime}
				]
			}),
			sm: new Ext.grid.RowSelectionModel({multiSelect:true})
		}
	},
	
	createSelectBox: function() {
		var defaultFolder = container.getHierarchyStore().getDefaultFolder('calendar'); // @type: Zarafa.hierarchy.data.MAPIFolderRecord		
		var subFolders = defaultFolder.getChildren();
		var myStore = [];
		
		/* add all local calendar folders */
		var i = 0;
		myStore.push(new Array(defaultFolder.getDefaultFolderKey(), defaultFolder.getDisplayName()));
		for(i = 0; i < subFolders.length; i++) {
			/* Store all subfolders */
			myStore.push(new Array(subFolders[i].getDisplayName(), subFolders[i].getDisplayName(), false)); // 3rd field = isPublicfolder
		}
		
		/* add all shared calendar folders */
		var pubStore = container.getHierarchyStore().getPublicStore();
		
		if(typeof pubStore !== "undefined") {
			try {
				var pubFolder = pubStore.getDefaultFolder("publicfolders");
				var pubSubFolders = pubFolder.getChildren();
				
				for(i = 0; i < pubSubFolders.length; i++) {
					if(pubSubFolders[i].isContainerClass("IPF.Appointment")){
						myStore.push(new Array(pubSubFolders[i].getDisplayName(), pubSubFolders[i].getDisplayName() + " [Shared]", true)); // 3rd field = isPublicfolder
					}
				}
			} catch (e) {
				console.log("Error opening the shared folder...");
				console.log(e);
			}
		}
		
		return {
			xtype: "selectbox",
			ref: 'calendarselector',
			id: 'calendarselector',  
			editable: false,
			name: "choosen_calendar",
			value: container.getSettingsModel().get("zarafa/v1/plugins/calendarimporter/default_calendar"),
			width: 100,
			fieldLabel: "Select a calender",
			store: myStore,
			mode: 'local',
			labelSeperator: ":",
			border: false,
			anchor: "100%",
			scope: this,
			allowBlank: false
		}
	},
	
	createTimezoneBox: function() {
		return {
			xtype: "selectbox",
			ref: 'timezoneselector',
			id: 'timezoneselector',  
			editable: false,
			name: "choosen_timezone",
			value: Zarafa.plugins.calendarimporter.data.Timezones.unMap(container.getSettingsModel().get("zarafa/v1/plugins/calendarimporter/default_timezone")),
			width: 100,
			fieldLabel: "Select a timezone (optional)",
			store: Zarafa.plugins.calendarimporter.data.Timezones.store,
			labelSeperator: ":",
			mode: 'local',
			border: false,
			anchor: "100%",
			scope: this,
			allowBlank: true,
			listeners: {
				'select': this.onTimezoneSelected,
				scope: this
			}
		}
	},
	
	createDaylightSavingCheckBox: function() {
		return {
			xtype: "checkbox",
			ref: 'dstcheck',
			id: 'dstcheck',
			name: "dst_check",
			width: 100,
			fieldLabel: "Ignore DST (optional)",
			boxLabel: 'This will ignore "Daylight saving time" offsets.',
			labelSeperator: ":",
			border: false,
			anchor: "100%",
			scope: this,
			allowBlank: true,
			listeners: {
				'check': this.onDstChecked,
				scope: this
			}
		}
	},
	
	createUploadField: function() {
		return {
			xtype: "fileuploadfield",
			ref: 'fileuploadfield',
			columnWidth: 1.0,
			id: 'form-file',    
			name: 'icsdata',
			emptyText: 'Select an .ics calendar',
			border: false,
			anchor: "100%",
			scope: this,
			allowBlank: false,
			listeners: {
				'fileselected': this.onFileSelected,
				scope: this
			}
		}
	},
	
	createSubmitButton: function() {
		return {
			xtype: "button",
			ref: "submitButton",
			id: "submitButton",
			disabled: true,
			width: 100,
			border: false,
			text: _("Import"),
			anchor: "100%",
			handler: this.importCheckedEvents,
			scope: this,
			allowBlank: false
		}
	},
	
	createSubmitAllButton: function() {
		return {
			xtype: "button",
			ref: "submitAllButton",
			id: "submitAllButton",
			disabled: true,
			width: 100,
			border: false,
			text: _("Import All"),
			anchor: "100%",
			handler: this.importAllEvents,
			scope: this,
			allowBlank: false
		}
	},
	
	createExportAllButton: function() {
		return {
			xtype: "button",
			ref: "exportAllButton",
			id: "exportAllButton",
			hidden: !container.getSettingsModel().get("zarafa/v1/plugins/calendarimporter/enable_export"),
			width: 100,
			border: false,
			text: _("Export All"),
			anchor: "100%",
			handler: this.exportAllEvents,
			scope: this,
			allowBlank: false
		}
	},
	
	createCancelButton: function() {
		return {
			xtype: "button",
			width: 100,
			border: false,
			text: _("Cancel"),
			anchor: "100%",
			handler: this.close,
			scope: this,
			allowBlank: false
		}
	},
	
	/**
	 * This is called when a timezone has been seleceted in the timezone dialog
	 * @param {Ext.form.ComboBox} combo
	 * @param {Ext.data.Record} record
	 * @param {Number} index
	 */
	onTimezoneSelected : function(combo, record, index) {
		this.timezone = record.data.field1;
		
		if(this.icsfile != null) {
			this.parseCalendar(this.icsfile, this.timezone, this.ignoredst);
		}
	},
	
	/**
	 * This is called when the dst checkbox has been selected
	 * @param {Ext.form.CheckBox} combo
	 * @param {boolean} checked
	 */
	onDstChecked : function(checkbox, checked) {
		this.ignoredst = checked;
		
		if(this.icsfile != null) {
			this.parseCalendar(this.icsfile, this.timezone, this.ignoredst);
		}
	},
	
	/**
	 * This is called when a file has been seleceted in the file dialog
	 * in the {@link Ext.ux.form.FileUploadField} and the dialog is closed
	 * @param {Ext.ux.form.FileUploadField} uploadField being added a file to
	 */
	onFileSelected : function(uploadField) {
		var form = this.addFormPanel.getForm();

		if (form.isValid()) {
			form.submit({
				waitMsg: 'Uploading and parsing calendar...',
				url: 'plugins/calendarimporter/php/upload.php',
				failure: function(file, action) {
					Ext.getCmp('submitButton').disable();
					Ext.getCmp('submitAllButton').disable();
					Zarafa.common.dialogs.MessageBox.show({
						title   : _('Error'),
						msg     : _(action.result.error),
						icon    : Zarafa.common.dialogs.MessageBox.ERROR,
						buttons : Zarafa.common.dialogs.MessageBox.OK
					});
				},
				success: function(file, action){
					uploadField.reset();
					this.icsfile = action.result.ics_file;
					
					this.parseCalendar(this.icsfile, this.timezone, this.ignoredst);
				},
				scope : this
			});
		}
	},
	
	parseCalendar: function (icsPath, timezone, ignoredst) {
		this.loadMask.show();
		// call export function here!
		var responseHandler = new Zarafa.plugins.calendarimporter.data.ResponseHandler({
			successCallback: this.handleParsingResult.createDelegate(this)
		});
		
		container.getRequest().singleRequest(
			'calendarmodule',
			'import',
			{
				ics_filepath: icsPath,
				timezone: timezone,
				ignore_dst: ignoredst
			},
			responseHandler
		);
	},
	
	handleParsingResult: function(response) {
		this.loadMask.hide();
		
		if(response["status"] == true) {
			Ext.getCmp('submitButton').enable();
			Ext.getCmp('submitAllButton').enable();
		
			if(typeof response.parsed.calendar["X-WR-TIMEZONE"] !== "undefined") {;
				this.timezone = response.parsed.calendar["X-WR-TIMEZONE"];
				this.timezoneselector.setValue(Zarafa.plugins.calendarimporter.data.Timezones.unMap(this.timezone));
			}
			this.reloadGridStore(response.parsed);
		} else {
			Ext.getCmp('submitButton').disable();
			Ext.getCmp('submitAllButton').disable();
			Zarafa.common.dialogs.MessageBox.show({
				title   : _('Parser Error'),
				msg     : _(response["message"]),
				icon    : Zarafa.common.dialogs.MessageBox.ERROR,
				buttons : Zarafa.common.dialogs.MessageBox.OK
			});
		}
	},

	close: function () {
		this.addFormPanel.getForm().reset();
		this.dialog.close()
	},

	convertToAppointmentRecord: function (calendarFolder,entry) {
		var newRecord = Zarafa.core.data.RecordFactory.createRecordObjectByMessageClass('IPM.Appointment', {
			startdate: new Date(entry.start),
			duedate: (entry.end != null) ?
				new Date(entry.end) :
				new Date(entry.start).add(Date.HOUR, 1),
			location: entry.location,
			subject: entry.title,
			body: entry.description,
			commonstart: new Date(entry.start),
			commonend: (entry.end != null) ?
				new Date(entry.end) :
				new Date(entry.start).add(Date.HOUR, 1),
			timezone: this.timezone,
			parent_entryid: calendarFolder.get('entryid'),
			store_entryid: calendarFolder.get('store_entryid')
		});
		
		var busystate = new Array("FREE", "TENTATIVE", "BUSY", "OOF");
		var zlabel = new Array("NONE", "IMPORTANT", "WORK", "PERSONAL", "HOLIDAY", "REQUIRED", "TRAVEL REQUIRED", "PREPARATION REQUIERED", "BIRTHDAY", "SPECIAL DATE", "PHONE INTERVIEW");
		
		/* optional fields */
		if(entry.priority !== "") {
			newRecord.data.importance = entry.priority;
		}
		if(entry.label !== "") {
			newRecord.data.label = zlabel.indexOf(entry.label);
		}
		if(entry.busy !== "") {
			newRecord.data.busystatus = busystate.indexOf(entry.busy);
		}
		if(entry.privatestate !== "") {
			newRecord.data["private"] = entry.privatestate == "PUBLIC" ? false : true;
		}
		if(entry.organizer !== "") {
			newRecord.data.sent_representing_email_address = entry.organizer;
		}
		if(entry.trigger != null) {
			newRecord.data.reminder = true;
			newRecord.data.reminder_minutes = new Date((entry.start - entry.trigger)/60);
			newRecord.data.reminder_time = new Date(entry.trigger);
		} else {
			newRecord.data.reminder = false;
		}
		
		return newRecord;
	},
	
	importCheckedEvents: function () {
		var newRecords = this.eventgrid.selModel.getSelections();
		this.importEvents(newRecords);
    },

	importAllEvents: function () {
		//receive Records from grid rows
		this.eventgrid.selModel.selectAll();  // select all entries
		var newRecords = this.eventgrid.selModel.getSelections();
		this.importEvents(newRecords);
    },
	
	exportAllEvents: function () {
		//receive existing calendar store
		var calValue = this.calendarselector.value;
		
		if(calValue == undefined) { // no calendar choosen
			Zarafa.common.dialogs.MessageBox.show({
				title   : _('Error'),
				msg     : _('You have to choose a calendar!'),
				icon    : Zarafa.common.dialogs.MessageBox.ERROR,
				buttons : Zarafa.common.dialogs.MessageBox.OK
			});
		} else {
			var calexist = true;
			var calendarFolder =  container.getHierarchyStore().getDefaultFolder('calendar');
			var pubStore = container.getHierarchyStore().getPublicStore();
			var pubSubFolders = [];
			if(typeof pubStore !== "undefined") {
				try {
					var pubFolder = pubStore.getDefaultFolder("publicfolders");
					var pubSubFolders = pubFolder.getChildren();
				} catch (e) {
					console.log("Error opening the shared folder...");
					console.log(e);
				}
			}
			
			if(calValue != "calendar") {
				var subFolders = calendarFolder.getChildren();
				var i = 0;
				
				/* add public folders if any exist */
				for(i = 0; i < pubSubFolders.length; i++) {		
					if(pubSubFolders[i].isContainerClass("IPF.Appointment")){
						subFolders.push(pubSubFolders[i]);
					}
				}
				
				for(i=0;i<subFolders.length;i++) {
					// loo up right folder 
					// TODO: improve!!
					if(subFolders[i].getDisplayName() == calValue) {
						calendarFolder = subFolders[i];
						break;
					}
				}
				
				if(calendarFolder.isDefaultFolder()) {
					Zarafa.common.dialogs.MessageBox.show({
						title   : _('Error'),
						msg     : _('Selected calendar does not exist!'),
						icon    : Zarafa.common.dialogs.MessageBox.ERROR,
						buttons : Zarafa.common.dialogs.MessageBox.OK
					});
					calexist = false;
				}
			}
			
			if(calexist) {
				Zarafa.common.dialogs.MessageBox.show({
					title: 'Please wait',
					msg: 'Generating ical file...',
					progressText: 'Exporting...',
					width:300,
					progress:true,
					closable:false
				});
				
				// progress bar... ;)
				var updateProgressBar = function(v){
					return function(){
						if(v == 100){
							if(Zarafa.common.dialogs.MessageBox.isVisible()) {
								updateTimer();
							}
						}else{
							Zarafa.common.dialogs.MessageBox.updateProgress(v/100, 'Exporting...');
						}
				   };
				};
				
				var updateTimer = function() {
					for(var i = 1; i < 101; i++){
						setTimeout(updateProgressBar(i), 20*i);
					}
				};
				
				updateTimer();
			
				// call export function here!
				var responseHandler = new Zarafa.plugins.calendarimporter.data.ResponseHandler({
					successCallback: this.exportPagedEvents.createDelegate(this)
				});
				
				container.getRequest().singleRequest(
					'appointmentlistmodule',
					'list',
					{
						groupDir: "ASC",
						restriction: {
							//start: 0,
							//limit: 500,	// limit to 500 events.... not working because of hardcoded limit in listmodule
							//startdate: 0,
							//duedate: 2145826800	// 2037... nearly highest unix timestamp
						},
						sort: [{
								"field": "startdate",
								"direction": "DESC"
						}],
						store_entryid : calendarFolder.data.store_entryid,
						entryid : calendarFolder.data.entryid
					},
					responseHandler
				);
			}
		}
    },
	
	/**
	 * Calculate needed Requests for all events
	 * Needed because the listmodule has hardcoded pageing setting -.-
	 * @param {Object} response
	 */
	exportPagedEvents:function(response) {
	
		if(response.page.start = 0 && response.item.length <= 0) {
			container.getNotifier().notify('info', 'Export Failed', 'There were no items to export!');
			Zarafa.common.dialogs.MessageBox.hide();
		} else {
			this.exportResponse = response.item;
		}
		
		if(this.totalExportCount == null) {
			this.totalExportCount = response.page.totalrowcount;
		}
		
		var requests = Math.ceil(response.page.totalrowcount / response.page.rowcount);
		this.runningRequests = requests;
		
		var i = 0;
		
		//receive existing calendar store
		var calValue = this.calendarselector.value;		
		var calendarFolder =  container.getHierarchyStore().getDefaultFolder('calendar');
		var pubStore = container.getHierarchyStore().getPublicStore();
		var pubSubFolders = [];
		if(typeof pubStore !== "undefined") {
			try {
				var pubFolder = pubStore.getDefaultFolder("publicfolders");
				var pubSubFolders = pubFolder.getChildren();
			} catch (e) {
				console.log("Error opening the shared folder...");
				console.log(e);
			}
		}
		
		if(calValue != "calendar") {
			var subFolders = calendarFolder.getChildren();
			var i = 0;
			
			/* add public folders if any exist */
			for(i = 0; i < pubSubFolders.length; i++) {		
				if(pubSubFolders[i].isContainerClass("IPF.Appointment")){
					subFolders.push(pubSubFolders[i]);
				}
			}
			
			for(i=0;i<subFolders.length;i++) {
				// loo up right folder 
				// TODO: improve!!
				if(subFolders[i].getDisplayName() == calValue) {
					calendarFolder = subFolders[i];
					break;
				}
			}
			
			if(calendarFolder.isDefaultFolder()) {
				Zarafa.common.dialogs.MessageBox.show({
					title   : _('Error'),
					msg     : _('Selected calendar does not exist!'),
					icon    : Zarafa.common.dialogs.MessageBox.ERROR,
					buttons : Zarafa.common.dialogs.MessageBox.OK
				});
			}
		}
		
		for(i = 0; i < requests; i++) {
			var responseHandler = new Zarafa.plugins.calendarimporter.data.ResponseHandler({
				successCallback: this.storeResult.createDelegate(this)
			});
			this.requestNext(calendarFolder, responseHandler, response.page.rowcount *(i+1), response.page.rowcount);
		}
	},

	/**
	 * Responsehandler for the single requests... will merge all events into one array
	 * @param {Object} response
	 */
	storeResult: function(response) {
			var tmp = this.exportResponse;
			
			this.exportResponse = tmp.concat(response.item);
			
			if(this.runningRequests <= 1) {
				// final request =)
				var responseHandler = new Zarafa.plugins.calendarimporter.data.ResponseHandler({
					successCallback: this.downLoadICS.createDelegate(this)
				});
				
				container.getRequest().singleRequest(
					'calendarmodule',
					'export',
					{
						data: this.exportResponse,
						calendar: this.calendarselector.value
					},
					responseHandler
				);
				container.getNotifier().notify('info', 'Exported', 'Found ' + this.exportResponse.length + ' entries to export. Preparing download...');
				this.dialog.close();
			}
			
			this.runningRequests--;
	},
	
	/**
	 * build a new event request for the listmodule
	 * @param {Object} calendarFolder the calendarFolder to export
	 * @param {Object} responseHandler (should be storeResult)
	 * @param {int} start
	 * @param {int} limit
	 */
	requestNext: function(calendarFolder, responseHandler, start, limit) {
		
		container.getRequest().singleRequest(
			'appointmentlistmodule',
			'list',
			{
				groupDir: "ASC",
				restriction: {
					start: start,
					limit: limit
					//startdate: 0,
					//duedate: 2145826800	// 2037... nearly highest unix timestamp
				},
				sort: [{
						"field": "startdate",
						"direction": "DESC"
				}],
				store_entryid : calendarFolder.data.store_entryid,
				entryid : calendarFolder.data.entryid
			},
			responseHandler
		);
	},
	
	/**
	 * download ics file =)
	 * @param {Object} response
	 * @private
	 */
	downLoadICS : function(response) {
		Zarafa.common.dialogs.MessageBox.hide();
		if(response.status === true) {
			if(!this.downloadFrame){
				this.downloadFrame = Ext.getBody().createChild({
					tag: 'iframe',
					cls: 'x-hidden'
				});
			}
			var url = 'plugins/calendarimporter/php/download.php?fileid='+response.fileid+'&basedir='+response.basedir+'&secid='+response.secid+'&realname='+response.realname;
			this.downloadFrame.dom.contentWindow.location = url;
		} else {
			container.getNotifier().notify('error', 'Export Failed', 'ICal File creation failed!');
		}
	},
	
	/** 
	 * This function stores all given events to the appointmentstore 
	 * @param events
	 */
	importEvents: function (events) {
		//receive existing calendar store
		var calValue = this.calendarselector.value;

		if(calValue == undefined) { // no calendar choosen
			Zarafa.common.dialogs.MessageBox.show({
				title   : _('Error'),
				msg     : _('You have to choose a calendar!'),
				icon    : Zarafa.common.dialogs.MessageBox.ERROR,
				buttons : Zarafa.common.dialogs.MessageBox.OK
			});
		} else {
			var calexist = true;
			if(this.eventgrid.selModel.getCount() < 1) {
				Zarafa.common.dialogs.MessageBox.show({
					title   : _('Error'),
					msg     : _('You have to choose at least one event to import!'),
					icon    : Zarafa.common.dialogs.MessageBox.ERROR,
					buttons : Zarafa.common.dialogs.MessageBox.OK
				});
			} else {
				var calendarStore = new Zarafa.calendar.AppointmentStore();
				var calendarFolder =  container.getHierarchyStore().getDefaultFolder('calendar');
				var pubStore = container.getHierarchyStore().getPublicStore();
				var pubFolder = pubStore.getDefaultFolder("publicfolders");
				var pubSubFolders = pubFolder.getChildren();
			
				if(calValue != "calendar") {
					var subFolders = calendarFolder.getChildren();
					var i = 0;
					for(i = 0; i < pubSubFolders.length; i++) {
						if(pubSubFolders[i].isContainerClass("IPF.Appointment")){
							subFolders.push(pubSubFolders[i]);
						}
					}
					for(i=0;i<subFolders.length;i++) {
						// look up right folder 
						// TODO: improve!!
						if(subFolders[i].getDisplayName() == calValue) {
							calendarFolder = subFolders[i];
							break;
						}
					}
					
					if(calendarFolder.isDefaultFolder()) {
						Zarafa.common.dialogs.MessageBox.show({
							title   : _('Error'),
							msg     : _('Selected calendar does not exist!'),
							icon    : Zarafa.common.dialogs.MessageBox.ERROR,
							buttons : Zarafa.common.dialogs.MessageBox.OK
						});
						calexist = false;
					}
				}

				if(calexist) {
					this.loadMask.show();
					//receive Records from grid rows
					Ext.each(events, function(newRecord) {
						var record = this.convertToAppointmentRecord(calendarFolder,newRecord.data);
						calendarStore.add(record);
					}, this);
					calendarStore.save();
					this.loadMask.hide();
					this.dialog.close();
					container.getNotifier().notify('info', 'Imported', 'Imported ' + events.length + ' events. Please reload your calendar!');
				}
			}
		}
	}	
});

Ext.reg('calendarimporter.importpanel', Zarafa.plugins.calendarimporter.dialogs.ImportPanel);