feat: watch together recent rooms, plex usernames, action toasts, shorter codes

close #855

lib/watch_together/services/recent_rooms_service.dart

@@ -0,0 +1,78 @@
+import 'dart:convert';
+
+import '../../services/settings_service.dart';
+
+class RecentRoom {
+  final String code;
+  final String? name;
+  final DateTime lastUsed;
+
+  const RecentRoom({required this.code, this.name, required this.lastUsed});
+
+  Map<String, dynamic> toJson() => {
+        'code': code,
+        if (name != null) 'name': name,
+        'lastUsed': lastUsed.millisecondsSinceEpoch,
+      };
+
+  factory RecentRoom.fromJson(Map<String, dynamic> json) => RecentRoom(
+        code: json['code'] as String,
+        name: json['name'] as String?,
+        lastUsed: DateTime.fromMillisecondsSinceEpoch(json['lastUsed'] as int),
+      );
+
+  RecentRoom copyWith({String? code, String? name, DateTime? lastUsed, bool clearName = false}) => RecentRoom(
+        code: code ?? this.code,
+        name: clearName ? null : (name ?? this.name),
+        lastUsed: lastUsed ?? this.lastUsed,
+      );
+}
+
+class RecentRoomsService {
+  static const int _maxRooms = 20;
+
+  static List<RecentRoom> getRecentRooms() {
+    final json = SettingsService.instanceOrNull?.getRecentRooms();
+    if (json == null) return [];
+    try {
+      final list = jsonDecode(json) as List<dynamic>;
+      final rooms = list.map((e) => RecentRoom.fromJson(e as Map<String, dynamic>)).toList();
+      rooms.sort((a, b) => b.lastUsed.compareTo(a.lastUsed));
+      return rooms;
+    } catch (_) {
+      return [];
+    }
+  }
+
+  static Future<void> _save(List<RecentRoom> rooms) async {
+    rooms.sort((a, b) => b.lastUsed.compareTo(a.lastUsed));
+    if (rooms.length > _maxRooms) rooms.removeRange(_maxRooms, rooms.length);
+    await SettingsService.instanceOrNull?.setRecentRooms(jsonEncode(rooms.map((r) => r.toJson()).toList()));
+  }
+
+  static Future<void> addOrUpdateRoom(String code, {String? name}) async {
+    final rooms = getRecentRooms();
+    final index = rooms.indexWhere((r) => r.code == code);
+    if (index >= 0) {
+      rooms[index] = rooms[index].copyWith(lastUsed: DateTime.now(), name: name ?? rooms[index].name);
+    } else {
+      rooms.add(RecentRoom(code: code, name: name, lastUsed: DateTime.now()));
+    }
+    await _save(rooms);
+  }
+
+  static Future<void> removeRoom(String code) async {
+    final rooms = getRecentRooms();
+    rooms.removeWhere((r) => r.code == code);
+    await _save(rooms);
+  }
+
+  static Future<void> renameRoom(String code, String? name) async {
+    final rooms = getRecentRooms();
+    final index = rooms.indexWhere((r) => r.code == code);
+    if (index >= 0) {
+      rooms[index] = rooms[index].copyWith(name: name, clearName: name == null);
+      await _save(rooms);
+    }
+  }
+}