import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_datetime_picker/flutter_datetime_picker.dart';
import 'datamodel.dart';
import 'dart:async';
import 'package:geolocator/geolocator.dart';
class AddEvent extends StatefulWidget {
const AddEvent({Key? key}) : super(key: key);
@override
State<AddEvent> createState() => _AddEventPageState();
}
class _AddEventPageState extends State<AddEvent> {
bool syncGNSSData = true;
late String long = "";
late String lat = "";
late String alt = "";
late double accuracy = 0.0;
late StreamSubscription<Position> streamHandler;
Future startGNSS() async {
debugPrint("Check Location Permission");
bool serviceStatus = false;
bool hasPermission = false;
serviceStatus = await Geolocator.isLocationServiceEnabled();
if(serviceStatus){
LocationPermission permission = await Geolocator.checkPermission();
if (permission == LocationPermission.denied) {
permission = await Geolocator.requestPermission();
if (permission == LocationPermission.denied) {
debugPrint('Location permissions are denied');
}else if(permission == LocationPermission.deniedForever){
debugPrint('Location permissions are permanently denied');
}else{
hasPermission = true;
}
}else{
hasPermission = true;
}
if(hasPermission){
debugPrint('Location permissions granted');
if(mounted){
setState(() {
//refresh the UI
});}
debugPrint('Starting location stream');
streamHandler = Geolocator.getPositionStream(
locationSettings: const LocationSettings(
accuracy: LocationAccuracy.high,
distanceFilter: 0,
)).listen((Position position) {
debugPrint('Get Location: Lat:' + position.latitude.toString() +
' Long:' + position.longitude.toString() +
' Alt:' + position.altitude.toString());
long = position.longitude.toString();
lat = position.latitude.toString();
alt = position.altitude.toString();
accuracy = position.accuracy;
if (syncGNSSData == true) {
if(mounted){
setState(() {
//refresh UI on update
});}
}
});
}
}else{
debugPrint("GPS Service is not enabled, turn on GPS location");
}
if(mounted){
setState(() {
//refresh the UI
});}
}
@override
void initState() {
startGNSS();
super.initState();
}
@override
void dispose() {
try {
streamHandler.cancel();
debugPrint('Cancel location stream');
}catch(e){
debugPrint('Canceling location stream failed');
}
super.dispose();
//TODO: only if initialized positionStream.cancel();
}
void _storeCurrentEvent() {
final EventStoreInstance eventsStore = EventStoreInstance();
eventsStore.currentEvent.status = "PENDING";
eventsStore.events.add(
Event(
eventsStore.currentEvent.id,
eventsStore.currentEvent.urn,
eventsStore.currentEvent.label,
eventsStore.currentEvent.type,
eventsStore.currentEvent.description,
eventsStore.currentEvent.status,
eventsStore.currentEvent.startDate,
eventsStore.currentEvent.endDate,
eventsStore.currentEvent.latitude,
eventsStore.currentEvent.longitude,
eventsStore.currentEvent.elevation
));
}
//TODO: add field validators for freetext fields. Check allowed characters in sensor.awi.de
@override
Widget build(BuildContext context) {
/* Get singletons to access relevant data here.*/
final EventStoreInstance eventsStore = EventStoreInstance();
final ConfigurationStoreInstance configuration = ConfigurationStoreInstance();
String gnssStatusText = "";
if (true == syncGNSSData){
// Update current event coordinates from GNSS stream
eventsStore.currentEvent.latitude = lat;
eventsStore.currentEvent.longitude = long;
eventsStore.currentEvent.elevation = alt;
var date = DateTime.now().toUtc();
eventsStore.currentEvent.startDate = '$date';
eventsStore.currentEvent.endDate = '$date';
if(accuracy == 0.0){
gnssStatusText = "No-Fix";
}
else{
gnssStatusText = "Precision: "+ accuracy.toStringAsFixed(2) +"m";
}
}
else{
gnssStatusText = "GNSS Disabled"; // Just display existing event coordinates
}
if (configuration.initialized == true) {
return Scaffold(
appBar: AppBar(title: const Text("Add Event")),
body:
Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
TextFormField(
initialValue: eventsStore.currentEvent.label,
autovalidateMode: AutovalidateMode.onUserInteraction,
decoration: const InputDecoration(
labelText: 'Label',
errorText: 'Only: a-z , A-Z , _ , 0-9 , ,(Comma) , ( , ) , + , - , . , :'
),
onChanged: (value) {
eventsStore.currentEvent.label = value;
},
validator: (value) {
if (!RegExp(r'^[a-z A-Z . \- 0-9 , ( ) + - _ :]+$').hasMatch(
value!)) {
return "Only: a-z , A-Z , _ , 0-9 , ,(Comma) , ( , ) , + , - , . , :";
} else {
eventsStore.currentEvent.label = value;
return ''; // Entered Text is valid
}
},
),
DropdownButtonFormField(
value: eventsStore.currentEvent.type,
isExpanded: true,
decoration: const InputDecoration(
labelText: 'Event Type',
),
items:
configuration.eventTypes.map((EventType event) {
return DropdownMenuItem(
value: event.name,
child: Text(event.name),
);
}).toList(),
onChanged: (value) {
eventsStore.currentEvent.type = value.toString();
}
),
DropdownButtonFormField(
value: eventsStore.currentEvent.urn,
isExpanded: true,
decoration: const InputDecoration(
labelText: 'URN',
),
items:
configuration.devices.map((Device device) {
return DropdownMenuItem(
value: device.urn,
child: Text(device.urn),
);
}).toList(),
onChanged: (value) {
eventsStore.currentEvent.urn = value.toString();
eventsStore.currentEvent.id =
configuration.getDeviceIdFromUrn(value.toString());
}
),
TextFormField(
initialValue: eventsStore.currentEvent.description,
decoration: const InputDecoration(
labelText: 'Description'
),
onChanged: (value) {
eventsStore.currentEvent.description = value;
},
),
Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Flexible(child:
TextFormField(
controller: TextEditingController(
text: eventsStore.currentEvent.startDate),
readOnly: true,
decoration: const InputDecoration(
labelText: 'Timestamp',
//helperText: '', //Adds some space below field
border: OutlineInputBorder(),
),
onTap: () {
DatePicker.showDateTimePicker(context,
showTitleActions: true,
onConfirm: (date) {
//Only one field for start and end date.
eventsStore.currentEvent.startDate = '$date';
eventsStore.currentEvent.endDate = '$date';
debugPrint('Date set to : $date');
setState(() {});
},
currentTime: DateTime.now().toUtc(),
locale: LocaleType.en);
},
),
),
ElevatedButton(
onPressed: () {
var date = DateTime.now().toUtc();
eventsStore.currentEvent.startDate = '$date';
eventsStore.currentEvent.endDate = '$date';
debugPrint('Date set to : ' +
eventsStore.currentEvent.endDate.toString());
setState(() {});
},
child: Text('Now'),
),
]
),
TextFormField(
readOnly: false,
enabled: !syncGNSSData,
controller: TextEditingController(
text: eventsStore.currentEvent.latitude.toString()),
decoration: const InputDecoration(
labelText: 'Latitude',
border: OutlineInputBorder(),
),
onChanged: (value) {
eventsStore.currentEvent.latitude = value;
}
),
TextFormField(
readOnly: false,
enabled: !syncGNSSData,
controller: TextEditingController(
text: eventsStore.currentEvent.longitude.toString()),
decoration: const InputDecoration(
labelText: 'Longitude',
border: OutlineInputBorder(),
),
onChanged: (value) {
eventsStore.currentEvent.longitude = value;
}
),
TextFormField(
readOnly: false,
enabled: !syncGNSSData,
controller: TextEditingController(
text: eventsStore.currentEvent.elevation.toString()),
decoration: const InputDecoration(
labelText: 'Elevation',
border: OutlineInputBorder(),
),
onChanged: (value) {
eventsStore.currentEvent.elevation = value;
}
),
]),
bottomNavigationBar: Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
Text(gnssStatusText),
const SizedBox(width: 10),
Switch(
value: syncGNSSData,
onChanged: (value) {
syncGNSSData = value;
debugPrint('Switched to:' + syncGNSSData.toString());
setState(() {
//refresh the UI
});
},
),
const SizedBox(width: 50),
FloatingActionButton(
heroTag: null,
onPressed: () {
_storeCurrentEvent();
HapticFeedback.vibrate();
},
tooltip: 'Add Event',
child: const Icon(Icons.check),
),
const SizedBox(width: 20),
],
),
);
}else {
return Scaffold(
appBar: AppBar(title: const Text("Add Event")),
body: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.end,
children: const <Widget>[
Text(
' Visit Configuration first.',
style: TextStyle(fontSize: 20)
),
],
),
);
}
}
}