✨ Basic messages & loading

lib/database/drift_db.dart

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+import 'dart:convert';
+import 'dart:io';
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:island/database/message.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart' as p;
+
+part 'drift_db.g.dart';
+
+// Define the database
+@DriftDatabase(tables: [ChatMessages])
+class AppDatabase extends _$AppDatabase {
+  AppDatabase() : super(_openConnection());
+
+  @override
+  int get schemaVersion => 1;
+
+  // Methods for chat messages
+  Future<List<ChatMessage>> getMessagesForRoom(
+    int roomId, {
+    int offset = 0,
+    int limit = 20,
+  }) {
+    return (select(chatMessages)
+          ..where((m) => m.roomId.equals(roomId))
+          ..orderBy([(m) => OrderingTerm.desc(m.createdAt)])
+          ..limit(limit, offset: offset))
+        .get();
+  }
+
+  Future<int> saveMessage(ChatMessagesCompanion message) {
+    return into(chatMessages).insert(message, mode: InsertMode.insertOrReplace);
+  }
+
+  Future<int> updateMessageStatus(String id, MessageStatus status) {
+    return (update(chatMessages)..where(
+      (m) => m.id.equals(id),
+    )).write(ChatMessagesCompanion(status: Value(status)));
+  }
+
+  Future<int> deleteMessage(String id) {
+    return (delete(chatMessages)..where((m) => m.id.equals(id))).go();
+  }
+
+  // Convert between Drift and model objects
+  ChatMessagesCompanion messageToCompanion(LocalChatMessage message) {
+    return ChatMessagesCompanion(
+      id: Value(message.id),
+      roomId: Value(message.roomId),
+      senderId: Value(message.senderId),
+      content: Value(message.toRemoteMessage().content),
+      nonce: Value(message.nonce),
+      data: Value(jsonEncode(message.data)),
+      createdAt: Value(message.createdAt),
+      status: Value(message.status),
+    );
+  }
+
+  LocalChatMessage companionToMessage(ChatMessage dbMessage) {
+    final data = jsonDecode(dbMessage.data);
+    return LocalChatMessage(
+      id: dbMessage.id,
+      roomId: dbMessage.roomId,
+      senderId: dbMessage.senderId,
+      data: data,
+      createdAt: dbMessage.createdAt,
+      status: dbMessage.status,
+      nonce: dbMessage.nonce,
+    );
+  }
+}
+
+// Helper to open the database connection
+LazyDatabase _openConnection() {
+  return LazyDatabase(() async {
+    final dbFolder = await getApplicationDocumentsDirectory();
+    final file = File(p.join(dbFolder.path, 'island_chat.sqlite'));
+    return NativeDatabase(file);
+  });
+}