Adds flight,battery models and image file managment

lib/db/db_helper.dart

@@ -3,10 +3,13 @@ import 'dart:developer';
 import 'dart:io';
 import 'package:path/path.dart';
 import 'package:logging/logging.dart';
+import 'package:rtime/models/battery.dart';
+import 'package:rtime/models/flight.dart';
 import '../models/drone.dart';
 
 
-import 'package:path_provider/path_provider.dart';import 'package:sqflite/sqflite.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:sqflite/sqflite.dart';
 
 class DbHelper 
 {
@@ -47,15 +50,42 @@ class DbHelper
             CREATE TABLE drones(
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
                 name TEXT NOT NULL,
-                image TEXT
+                image_uuid TEXT
             )
         ''');
+
+        await db.execute('''
+            CREATE TABLE batteries(
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                name TEXT NOT NULL,
+                type TEXT NOT NULL,
+                volatege REAL NOT NULL,
+                image_uuid TEXT
+            )
+        ''');
+
+        await db.execute('''
+                CREATE TABLE flights(
+                    id INTEGER PRIMARY KEY AUTOINCREMENT,
+                    name TEXT NOT NULL,
+                    start_timestamp INTEGER NOT NULL,
+                    end_timestamp INTEGER NOT NULL,
+                    drone_id INTEGER NOT NULL,
+                    battery_id INTEGER NOT NULL,
+                    location_lat REAL,
+                    location_long REAL,
+                    FOREIGN KEY(drone_id) REFERENCES drones(id),
+                    FOREIGN KEY(battery_id) REFERENCES batteries(id)
+                    )
+                ''');
     }
 
-    Future<int> insertDrone(Drone drone) async
+    // Drone related helpers
+    Future<Drone> insertDrone(Drone drone) async
     {
         final db = await database;
-        return await db.insert("drones", drone.toMap());
+        drone.id = await db.insert("drones", drone.toMap());
+        return drone;
     }
 
     Future<List<Drone>> getDrones() async
@@ -65,10 +95,54 @@ class DbHelper
         return maps.map((e) => Drone.fromMap(e)).toList();
     }
 
-    Future<int> deleteItem(int drone_id) async
+    Future<int> deleteDrone(int droneId) async
+    {
+        // TODO: Delete image
+        final db = await database;
+        return await db.delete("drones", where: "id = ?", whereArgs: [droneId]);
+    }
+
+    // Battery related helpers
+    Future<Battery> insertBattery(Battery battery) async
     {
         final db = await database;
-        return await db.delete("drones", where: "id = ?", whereArgs: [drone_id]);
+        battery.id = await db.insert("batteries", battery.toMap());
+        return battery;
+    }
+
+    Future<List<Battery>> getBatteries() async
+    {
+        final db = await database;
+        final maps = await db.query("batteries");
+        return maps.map((e) => Battery.fromMap(e)).toList();
+    }
+
+    Future<int> deleteBattery(int batteryId) async
+    {
+        // TODO: Delete image
+        final db = await database;
+        return await db.delete("batteries", where: "id = ?", whereArgs: [batteryId]);
+    }
+
+    // Flight related helpers
+    Future<Flight> insertFlight(Flight flight) async
+    {
+        final db = await database;
+        flight.id = await db.insert("flights", flight.toMap());
+        return flight;
+    }
+
+    Future<List<Flight>> getFlights() async
+    {
+        final db = await database;
+        final maps = await db.query("flights");
+        return maps.map((e) => Flight.fromMap(e)).toList();
+    }
+
+    Future<int> deleteFlight(int flightId) async
+    {
+        final db = await database;
+        return await db.delete("flights", where: "id = ?", whereArgs: [flightId]);
     }
 
     Future closeDb() async

lib/images_manager.dart

@@ -0,0 +1,79 @@
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
+import 'package:logging/logging.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart' as path;
+import 'package:uuid/uuid.dart';
+import 'package:image/image.dart' as img;
+import 'package:uuid/v5.dart';
+
+class ImagesManager 
+{
+    static final ImagesManager instance = ImagesManager._internal();
+    ImagesManager._internal();
+
+    static final Logger log = Logger("ImagesManager");
+
+    static Uri? _imagesDirectory;
+
+    Future<Uri> get imageDirectory async
+    {
+        if(_imagesDirectory != null) return _imagesDirectory!;
+        await _initImagesDirectory();
+        return _imagesDirectory!;
+    }
+
+    Future _initImagesDirectory() async
+    {
+        final directoryLoc = await getApplicationDocumentsDirectory();
+        final directoryName = "images";
+        final directoryPath = path.join(directoryLoc.path, directoryName);
+        final directoryUri = Uri.directory(directoryPath);
+        final directory = Directory.fromUri(directoryUri);
+        
+        if(!await directory.exists())
+        {
+            log.info("Image directory does not yet extists. Creating it.");
+        }
+
+        directory.create(recursive: false);
+        
+        log.info("Image directory set up at '$directory'");
+        
+        _imagesDirectory = directoryUri;
+    }
+
+    Future<String?> createImage(ImageSource source) async
+    {
+        // Get image from camera or not
+        final XFile? ximage = await ImagePicker().pickImage(source: source);
+        if(ximage == null) return null;
+
+        final uuid = Uuid().v6();
+        final imageDir = await imageDirectory;
+        ximage.saveTo(path.join(imageDir.path, uuid + path.extension(ximage.name)));
+        return uuid;
+    }
+
+    Future<Image?> loadImage(String imageUuid) async
+    {
+        final imageDir = await imageDirectory;
+        if(!Uuid.isValidUUID(fromString: imageUuid))
+        {
+            log.warning("Tried to load an image with an invalid UUID : '$imageUuid'.");
+            return null;
+        }
+
+        final imagePath = path.join(imageDir.path, "$imageUuid.jpg");
+        final file = File(imagePath);
+        if(!await file.exists())
+        {
+            log.warning("Tried to load an image that does not extist: '$imagePath'.");
+            return null;
+        }
+
+        return Image.file(file);
+    }
+}

lib/main.dart

@@ -1,10 +1,14 @@
 import 'dart:io';
 
 import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
 import 'package:logging/logging.dart';
 import 'package:rtime/db/db_helper.dart';
+import 'package:rtime/images_manager.dart';
 import 'package:rtime/models/drone.dart';
 import 'package:sqflite_common_ffi/sqflite_ffi.dart';
+import 'package:image_picker/image_picker.dart';
+import 'package:sqlite3_flutter_libs/sqlite3_flutter_libs.dart';
 
 void main() {
     if(Platform.isWindows || Platform.isLinux)
@@ -74,7 +78,16 @@ class MyHomePage extends StatefulWidget {
 class _MyHomePageState extends State<MyHomePage> {
   int _counter = 0;
 
-  void _incrementCounter() {
+  Future _incrementCounter() async {
+
+      DbHelper.instance.insertDrone(Drone
+              (
+               name: "Image test",
+               imageUuid: await ImagesManager.instance.createImage(ImageSource.camera)
+              ));
+
+
+
     setState(() {
       // This call to setState tells the Flutter framework that something has
       // changed in this State, which causes it to rerun the build method below
@@ -82,7 +95,6 @@ class _MyHomePageState extends State<MyHomePage> {
       // _counter without calling setState(), then the build method would not be
       // called again, and so nothing would appear to happen.
       _counter++;
-      DbHelper.instance.insertDrone(Drone(name: "skibidi drone"));
     });
   }
 
@@ -94,6 +106,43 @@ class _MyHomePageState extends State<MyHomePage> {
     // The Flutter framework has been optimized to make rerunning build methods
     // fast, so that you can just rebuild anything that needs updating rather
     // than having to individually change instances of widgets.
+    var children = 
+          <Widget>[
+            const Text('You have pushed the button this many times:'),
+            Text(
+              '$_counter',
+              style: Theme.of(context).textTheme.headlineMedium,
+            ),
+            FutureBuilder(
+                future: Future<Widget>(() async
+                {
+                    final drones = await DbHelper.instance.getDrones();
+
+                    if(drones.isEmpty)
+                    {
+                        return Icon(Icons.question_mark); 
+                    }
+
+                    final image = await ImagesManager.instance.loadImage(drones.first.imageUuid!);
+                    if(image == null)
+                    {
+                        return Icon(Icons.error);
+                    }
+
+                    return image;
+                }),
+                builder: (BuildContext ctx, AsyncSnapshot<Widget> img)
+                {
+                    if(!img.hasData)
+                    {
+                        return Center(child: CircularProgressIndicator(),);
+                    }
+                    
+                    return img.data!;
+                }
+            ),
+            Icon(Icons.build)];
+
     return Scaffold(
       appBar: AppBar(
         // TRY THIS: Try changing the color here to a specific color (to
@@ -122,14 +171,8 @@ class _MyHomePageState extends State<MyHomePage> {
           // action in the IDE, or press "p" in the console), to see the
           // wireframe for each widget.
           mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            const Text('You have pushed the button this many times:'),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headlineMedium,
-            ),
-          ],
-        ),
+          children: children,
+          ),
       ),
       floatingActionButton: FloatingActionButton(
         onPressed: _incrementCounter,
@@ -139,3 +182,4 @@ class _MyHomePageState extends State<MyHomePage> {
     );
   }
 }
+

lib/models/battery.dart

@@ -0,0 +1,33 @@
+class Battery {
+  int? id;
+  String name;
+  String type;
+  double voltage;
+  String? imageUuid;
+
+  Battery({
+    this.id,
+    required this.name,
+    required this.type,
+    required this.voltage,
+    this.imageUuid,
+  });
+
+  factory Battery.fromMap(Map<String, dynamic> map) => Battery(
+    id: map["id"],
+    name: map["name"],
+    type: map["type"],
+    voltage: map["voltage"],
+    imageUuid: map["image_uuid"],
+  );
+
+  Map<String, dynamic> toMap() {
+    return {
+      "id": id,
+      "name": name,
+      "type": type,
+      "voltage": voltage,
+      "image_uuid": imageUuid,
+    };
+  }
+}

lib/models/drone.dart

@@ -1,24 +1,14 @@
-import 'package:image/image.dart' as img;
+class Drone {
+  int? id;
+  String name;
+  String? imageUuid;
 
-class Drone
-{
-    final int? id;
-    final String name;
-    //final img.Image image;
+  Drone({this.id, required this.name, this.imageUuid});
 
-    Drone ({this.id, required this.name});  //required this.image});
+  factory Drone.fromMap(Map<String, dynamic> map) =>
+      Drone(id: map["id"], name: map["name"], imageUuid: map["image_uuid"]);
 
-    factory Drone.fromMap(Map<String, dynamic> map) => Drone
-    (
-        id: map["id"],
-        name: map["name"],
-        //image: img.decodeJpg(map["image"])!,
-    );
-
-    Map<String, dynamic> toMap() =>
-    {
-        "id": id,
-        "name": name,
-        //"image": img.encodeJpg(image),
-    };
+  Map<String, dynamic> toMap() {
+    return {"id": id, "name": name, "image_uuid": imageUuid};
+  }
 }

lib/models/flight.dart

@@ -0,0 +1,51 @@
+class Flight {
+  int? id;
+  String name;
+
+  // Timestamp in seconds since epoch
+  int startTimestamp;
+  int endTimestamp;
+
+  // Foreign keys
+  int droneId;
+  int batteryId;
+
+  // Location
+  double? locationLat;
+  double? locationLong;
+
+  Flight({
+    this.id,
+    required this.name,
+    required this.startTimestamp,
+    required this.endTimestamp,
+    required this.droneId,
+    required this.batteryId,
+    this.locationLat,
+    this.locationLong,
+  });
+
+  factory Flight.fromMap(Map<String, dynamic> map) => Flight(
+    id: map["id"],
+    name: map["name"],
+    startTimestamp: map["start_timestamp"],
+    endTimestamp: map["end_timestamp"],
+    droneId: map["drone_id"],
+    batteryId: map["batteryId"],
+    locationLat: map["location_lat"],
+    locationLong: map["location_long"],
+  );
+
+  Map<String, dynamic> toMap() {
+    return {
+      "id": id,
+      "name": name,
+      "start_timestamp": startTimestamp,
+      "end_timestamp": endTimestamp,
+      "drone_id": droneId,
+      "battery_id": batteryId,
+      "location_lat": locationLat,
+      "location_long": locationLong,
+    };
+  }
+}