started adding a sqlite implementation to store events locally

build/app/outputs/apk/release/output-metadata.json

-{
-  "version": 2,
-  "artifactType": {
-    "type": "APK",
-    "kind": "Directory"
-  },
-  "applicationId": "awi.de.mobileeventlog",
-  "variantName": "processReleaseResources",
-  "elements": [
-    {
-      "type": "SINGLE",
-      "filters": [],
-      "versionCode": 1,
-      "versionName": "1.0.0",
-      "outputFile": "app-release.apk"
-    }
-  ]
-}
\ No newline at end of file

lib/addevent.dart

@@ -2,6 +2,7 @@ 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 'package:shared_preferences/shared_preferences.dart';
 import 'datamodel.dart';
 import 'dart:async';
 import 'package:geolocator/geolocator.dart';
@@ -20,6 +21,7 @@ class _AddEventPageState extends State<AddEvent>  {
   late String alt = "";
   late double accuracy = 0.0;
   late StreamSubscription<Position> streamHandler;  //For canceling GNSS stream on dispose
+  final prefs = SharedPreferences.getInstance();  // Is async
 
   Future startGNSS() async {
     debugPrint("Check Location Permission");
@@ -163,7 +165,8 @@ class _AddEventPageState extends State<AddEvent>  {
     eventsStore.currentEvent.status = "PENDING";
     eventsStore.events.add(
         Event(
-            id: eventsStore.currentEvent.id,
+            id: 0,
+            urnId: eventsStore.currentEvent.urnId,
             urn: eventsStore.currentEvent.urn,
             label: eventsStore.currentEvent.label,
             type: eventsStore.currentEvent.type,
@@ -274,7 +277,7 @@ class _AddEventPageState extends State<AddEvent>  {
                       }).toList(),
                       onChanged: (value) {
                         eventsStore.currentEvent.urn = value.toString();
-                        eventsStore.currentEvent.id =
+                        eventsStore.currentEvent.urnId =
                             configuration.getDeviceIdFromUrn(value.toString());
                       }
                   ),

lib/databaseconnector.dart

+import 'package:flutter/material.dart';
+import 'package:sqflite/sqflite.dart';
+import 'package:path/path.dart';
+import 'dart:async';
+import 'datamodel.dart';
+
+class DatabaseConnector{
+  static const String eventDatabase = 'sensor_events.db';
+  static const String eventTable = 'events';
+  dynamic database;
+
+  Future<void> connect() async {
+    database = openDatabase(
+
+      join(await getDatabasesPath(), eventDatabase),
+
+      // When the database is first created, create a table to store the events.
+      onCreate: (db, version) {
+        // Run the CREATE TABLE statement on the database.
+        return db.execute(
+          'CREATE TABLE $eventTable(id INTEGER PRIMARY KEY, urnId INTEGER,urn TEXT, label TEXT, type TEXT, typeId INTEGER, description TEXT, status TEXT, startDate TEXT, endDate TEXT, latitude REAL, longitude REAL, elevation REAL)',
+        );
+      },
+      // Set the version. This executes the onCreate function and provides a
+      // path to perform database upgrades and downgrades.
+      version: 1,
+    );
+  }
+
+
+  Future<void> insertEvent(Event event) async {
+      final db = await database;
+      await db.insert(
+        eventTable,
+        event.toMap(),
+        conflictAlgorithm: ConflictAlgorithm.replace,
+      );
+  }
+
+  // A method that retrieves all the dogs from the dogs table.
+  Future<List<Event>> getEvents() async {
+    // Get a reference to the database.
+    final db = await database;
+
+    final List<Map<String, dynamic>> maps = await db.query(eventTable);
+
+    // Convert the List<Map<String, dynamic> into a List<Event>.
+    return List.generate(maps.length, (i) {
+      return Event(
+        id: maps[i]['id'],
+        urnId: maps[i]['urnId'],
+        urn: maps[i]['urn'],
+        label: maps[i]['label'],
+        type: maps[i]['type'],
+        typeId: maps[i]['typeId'],
+        description: maps[i]['description'],
+        status: maps[i]['status'],
+        startDate: maps[i]['startDate'],
+        endDate: maps[i]['endDate'],
+        latitude: maps[i]['latitude'],
+        longitude: maps[i]['longitude'],
+        elevation: maps[i]['elevation'],
+      );
+    });
+  }
+
+}
+
+
+
+
+
+
+/*
+*   int id;  // Device URN id
+  String urn;
+  String label;
+  String type; // Event type name  TODO: this should be an EventType variable
+  int typeId;
+  String description;
+  String status;
+  String startDate;
+  String endDate;
+  String latitude;
+  String longitude;
+  String elevation;
+*
+*
+* */
\ No newline at end of file

lib/datamodel.dart

@@ -2,6 +2,8 @@
 
 import 'dart:convert';
 
+import 'package:flutter/cupertino.dart';
+
 class Collection {
   int id;
   String description;
@@ -57,7 +59,8 @@ class Device{
 
 
 class Event{
-  int id;  // Device URN id
+  int id;
+  int urnId;  // Device URN id
   String urn;
   String label;
   String type; // Event type name  TODO: this should be an EventType variable
@@ -72,6 +75,7 @@ class Event{
 
   Event({
     required this.id,
+    required this.urnId,
     required this.urn,
     required this.label,
     required this.type,
@@ -88,6 +92,7 @@ class Event{
   factory Event.fromJson(Map<String, dynamic> json){
     return Event(
       id: json['id'],
+      urnId: json['urnId'],
       urn: json['urn'],
       label: json['label'],
       type: json['type'],
@@ -102,8 +107,27 @@ class Event{
     );
   }
 
+  Map<String, dynamic> toMap() {
+    return {
+      'id' : id,
+      'urnId': urnId,
+      'urn': urn,
+      'label': label,
+      'type' : type,
+      'typeId' : typeId,
+      'description' : description,
+      'status' : status,
+      'startDate' : startDate,
+      'endDate' : endDate,
+      'latitude' : latitude,
+      'longitude' : longitude,
+      'elevation' : elevation
+    };
+  }
+
   Map<String, dynamic> toJson() => {
-    'id': id,
+    'id' : id,
+    'urnId': urnId,
     'urn': urn,
     'label': label,
     'type' : type,
@@ -119,7 +143,7 @@ class Event{
 
   Map<String, dynamic> toSensorJson() {
     return {
-      "\"itemID\"":"\"$id\"",
+      "\"itemID\"":"\"$urnId\"",
       "\"inheritToAllChildren\"":"\"false\"",
       "\"inheritToChildren\"":[],
       "\"event\"":{
@@ -138,7 +162,9 @@ class Event{
 
   @override
   String toString(){
-    return '{ ${this.id}, '
+    return '{ '
+        '${this.id}, '
+        '${this.urnId}, '
         '${this.urn}, '
         '${this.label}, '
         '${this.type}, '
@@ -270,7 +296,8 @@ class ConfigurationStoreInstance extends ConfigurationStoreBase {
 abstract class EventStoreBase{
   List<Event> events = [];
   Event currentEvent = Event(
-      id:-1,
+      id: 0,
+      urnId:-1,
       urn:'urn0',
       label:'',
       type:'',
@@ -307,10 +334,8 @@ abstract class EventStoreBase{
 
   fromEventDump(dump){
     events = [];
-    print(dump);
-    List<dynamic> data = jsonDecode(dump);
-    for (var entry in data) {
-      print(entry);
+    for (var entry in dump) {
+      debugPrint('Added Event from Storage: ' + entry.toString());
       events.add(Event.fromJson(entry));
     }
   }
@@ -327,7 +352,8 @@ class EventStoreInstance extends EventStoreBase {
   EventStoreInstance._internal() {
     events = [];
     currentEvent = Event(
-        id:-1,
+        id:0,
+        urnId:-1,
         urn:'urn0',
         label:'',
         type:'',
@@ -345,7 +371,8 @@ class EventStoreInstance extends EventStoreBase {
   void reset(){
     events = [];
     currentEvent = Event(
-        id:-1,
+        id:0,
+        urnId:-1,
         urn:'urn0',
         label:'',
         type:'',

lib/main.dart

@@ -2,32 +2,48 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:path_provider/path_provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'datamodel.dart';
 import 'addevent.dart';
 import 'viewevents.dart';
 import 'overview.dart';
 import 'configuration.dart';
 
-Future<void> pathstuff() async {
+Future<void> pathStuff() async {
 
 
   //Directory downloadsDirectory = await DownloadsPathProvider.downloadsDirectory;
 
   //Directory appDocDir = await getApplicationDocumentsDirectory();
 
+  //debugPrint(appDocDir.path.toString());
 
 
+  WidgetsFlutterBinding.ensureInitialized();
+
+  final prefs = await SharedPreferences.getInstance();
+  //prefs.setString('events', 'blabla');
+  final String? events = prefs.getString('events');
+  print('Shared Preferences: ' + events!);
+
+  //const storage = FlutterSecureStorage();
+  //Map<String, String> allValues = await storage.readAll();
+  //print('Secure Storage: ' + allValues.toString());
 
-  //debugPrint(appDocDir.path.toString());
-}
 
-void main() {
 
 
-  //pathstuff();
 
 
 
+}
+
+void main() {
+
+
+  pathStuff();
+
 
 
   EventStoreInstance events = EventStoreInstance();
@@ -47,6 +63,19 @@ void main() {
   //configuration.currentCollection = Collection.fromJson({"id":1,"description":"","collectionName":"FRAM"});
   //configuration.initialized = true;
 
+events.fromEventDump(
+  [
+    {"id":102,"urn":"mooring:f9-12","label":"hggg","type":"Calibration",
+      "typeId":15,"description":"ggggg","status":"PENDING",
+      "startDate":"2022-03-28T07:00:02.712112Z",
+      "endDate":"2022-03-28T07:00:02.712112Z","latitude":"53.5440109",
+      "longitude":"8.58033187","elevation":"48.7139892578125"},
+    {"id":102,"urn":"mooring:f9-12","label":"hggg","type":"Calibration",
+      "typeId":15,"description":"ggggg","status":"PENDING",
+      "startDate":"2022-03-28T07:00:03.828190Z",
+      "endDate":"2022-03-28T07:00:03.828190Z","latitude":"53.54401033",
+      "longitude":"8.58032778","elevation":"48.720947265625"},
+  ]);
   //events.fromEventDump([{"id":102,"urn":"mooring:f9-12","label":"cf","type":"Calibration","typeId":15,"description":"fd","status":"PENDING","startDate":"2022-03-25T12:47:30.659436Z","endDate":"2022-03-25T12:47:30.659436Z","latitude":"","longitude":"","elevation":""},{"id":102,"urn":"mooring:f9-12","label":"cf","type":"Calibration","typeId":15,"description":"fd","status":"PENDING","startDate":"2022-03-25T12:47:32.136009Z","endDate":"2022-03-25T12:47:32.136009Z","latitude":"","longitude":"","elevation":""}]);
 
 
@@ -57,7 +86,7 @@ void main() {
     ),
     initialRoute: '/',
     routes: {
-      '/': (context) => Overview(),
+      '/': (context) => const Overview(),
       '/second': (context) => const AddEvent(),
       '/third': (context) => const ViewEvents(),
       '/forth': (context) => const Configuration(),

lib/overview.dart

@@ -14,6 +14,8 @@ class Overview extends StatelessWidget {
         children: const <Widget>[
           Icon( Icons.copyright_outlined),
           Text('Alfred Wegener Institute'),
+          Text('Data-Logistics-Support'),
+          SizedBox(height: 10),
           Text('Maximilian Betz'),
           SizedBox(height: 30),
           Text('o2a-support@awi.de'),

pubspec.lock

@@ -118,6 +118,48 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.1.0"
+  flutter_secure_storage:
+    dependency: "direct main"
+    description:
+      name: flutter_secure_storage
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.0.2"
+  flutter_secure_storage_linux:
+    dependency: transitive
+    description:
+      name: flutter_secure_storage_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  flutter_secure_storage_macos:
+    dependency: transitive
+    description:
+      name: flutter_secure_storage_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  flutter_secure_storage_platform_interface:
+    dependency: transitive
+    description:
+      name: flutter_secure_storage_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  flutter_secure_storage_web:
+    dependency: transitive
+    description:
+      name: flutter_secure_storage_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
+  flutter_secure_storage_windows:
+    dependency: transitive
+    description:
+      name: flutter_secure_storage_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.2"
   flutter_signin_button:
     dependency: transitive
     description:
@@ -399,6 +441,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.1"
+  sqflite:
+    dependency: "direct main"
+    description:
+      name: sqflite
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
+  sqflite_common:
+    dependency: transitive
+    description:
+      name: sqflite_common
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
   stack_trace:
     dependency: transitive
     description:
@@ -420,6 +476,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0+2"
   term_glyph:
     dependency: transitive
     description:

pubspec.yaml

@@ -31,6 +31,8 @@ dependencies:
     sdk: flutter
 
   shared_preferences: ^2.0.12
+  flutter_secure_storage: ^5.0.2
+  sqflite: ^2.0.2
   path_provider: ^2.0.9
   http: ^0.13.4
   geolocator: ^8.1.1