Add FPB motive selection

1 files changed, 135 insertions, 0 deletions

diff --git a/lib/model/motive_selection/flutter_blue_plus_motive_selection.dart b/lib/model/motive_selection/flutter_blue_plus_motive_selection.dart
new file mode 100644
index 0000000..1f86936
--- /dev/null
+++ b/lib/model/motive_selection/flutter_blue_plus_motive_selection.dart
@@ -0,0 +1,135 @@
+// Copyright (C) 2025, uvok cheetah
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import 'dart:convert';
+
+import 'package:flutter_blue_plus/flutter_blue_plus.dart';
+import 'package:uvok_epaper_badge/model/device/flutter_blue_plus_device.dart';
+import 'package:uvok_epaper_badge/string_ext.dart';
+import 'package:uvok_epaper_badge/badge_exception.dart';
+import 'package:uvok_epaper_badge/model/badge_motive.dart';
+import 'package:uvok_epaper_badge/model/motive_selection/badge_motive_selection.dart';
+
+class FlutterBluePlusMotiveSelection implements BadgeMotiveSelection {
+  final FlutterBluePlusDevice _device;
+  final String _badgeService = "ca260000-b4bb-46b2-bd06-b7b7a61ea990";
+  final String _currentMotiveCharacteristic =
+      "ca260001-b4bb-46b2-bd06-b7b7a61ea990";
+  final String _availableMotivesCharacteristic =
+      "ca260002-b4bb-46b2-bd06-b7b7a61ea990";
+  bool _loadedServices = false;
+
+  List<BadgeMotive> _cachedMotives = [];
+
+  late final BluetoothDevice _fbpDevice;
+
+  FlutterBluePlusMotiveSelection({required FlutterBluePlusDevice device})
+    : _device = device {
+    _fbpDevice = _device.scanResult.device;
+  }
+
+  @override
+  Future<BadgeMotive> getCurrentMotive() async {
+    await _ensureConnected();
+
+    if (_cachedMotives.isEmpty) {
+      await getMotives();
+    }
+    if (_cachedMotives.isEmpty) {
+      throw BadgeException(
+        "No motives available, so there's no current motive",
+      );
+    }
+
+    try {
+      var serv = _fbpDevice.servicesList.firstWhere(
+        (s) => s.uuid.str == _badgeService,
+      );
+      var c = serv.characteristics.firstWhere(
+        (c) => c.characteristicUuid.str == _currentMotiveCharacteristic,
+      );
+
+      var val = await c.read();
+      int? currentMotive = int.tryParse(ascii.decode(val));
+      if (currentMotive == null) {
+        throw BadgeException("Error reading current motive.");
+      }
+      return _cachedMotives.singleWhere(
+        (bm) => bm.id == currentMotive,
+        orElse: () => throw BadgeException("Selected motive not in templates"),
+      );
+    } on StateError {
+      throw BadgeException("Characeristic/Service not found.");
+    }
+  }
+
+  @override
+  Future<List<BadgeMotive>> getMotives() async {
+    await _ensureConnected();
+
+    try {
+      var serv = _fbpDevice.servicesList.firstWhere(
+        (s) => s.uuid.str == _badgeService,
+      );
+      var c = serv.characteristics.firstWhere(
+        (c) => c.characteristicUuid.str == _availableMotivesCharacteristic,
+      );
+      var val = await c.read();
+      var templates = ascii.decode(val);
+      _cachedMotives = templates
+          .split(";")
+          .where((s) => s.isNotEmpty)
+          .map((String s) {
+            List<String> parts = s.splitFirst("-");
+            if (parts.length != 2) {
+              return BadgeMotive(-1, "Invalid value");
+            }
+            return BadgeMotive(int.tryParse(parts[0]) ?? -1, parts[1]);
+          })
+          .toList(growable: false);
+    } on StateError {
+      throw BadgeException("Characeristic/Service not found.");
+    }
+
+    return _cachedMotives;
+  }
+
+  Future<void> _ensureConnected() async {
+    if (_fbpDevice.isDisconnected) {
+      throw BadgeException("Not connected");
+    }
+    if (!_loadedServices) {
+      await _fbpDevice.discoverServices();
+      _loadedServices = true;
+    }
+  }
+
+  @override
+  Future<void> setCurrentMotive(BadgeMotive motive) async {
+    await _ensureConnected();
+    try {
+      var serv = _fbpDevice.servicesList.firstWhere(
+        (s) => s.uuid.str == _badgeService,
+      );
+      var c = serv.characteristics.firstWhere(
+        (c) => c.characteristicUuid.str == _currentMotiveCharacteristic,
+      );
+
+      await c.write(ascii.encode(motive.id.toString()));
+    } on StateError {
+      throw BadgeException("Characeristic/Service not found.");
+    }
+  }
+}