Initial commit: Accessible SSH Terminal

lib/state/saved_connections_provider.dart

@@ -0,0 +1,69 @@
+import 'dart:convert';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:accessible_terminal/models/saved_connection.dart';
+
+// Key for SharedPreferences
+const String _kSavedConnectionsKey = 'saved_connections';
+
+class SavedConnectionsNotifier extends StateNotifier<List<SavedConnection>> {
+  SavedConnectionsNotifier() : super([]) {
+    _loadConnections();
+  }
+
+  Future<void> _loadConnections() async {
+    final prefs = await SharedPreferences.getInstance();
+    final String? jsonString = prefs.getString(_kSavedConnectionsKey);
+    if (jsonString != null) {
+      try {
+        final List<dynamic> jsonList = jsonDecode(jsonString);
+        state = jsonList.map((e) => SavedConnection.fromJson(e)).toList();
+      } catch (e) {
+        // Handle corruption or format change gracefully
+        state = [];
+      }
+    }
+  }
+
+  Future<void> addConnection({
+    required String host,
+    required int port,
+    required String username,
+    String? privateKey,
+  }) async {
+    // Check for duplicates (simple check based on host/user/port)
+    final exists = state.any((c) => 
+      c.host == host && c.port == port && c.username == username
+    );
+    
+    if (exists) return; // Don't save if already exists
+    
+    // Use timestamp for simple ID generation
+    final simpleId = DateTime.now().millisecondsSinceEpoch.toString();
+     final connection = SavedConnection(
+      id: simpleId,
+      host: host,
+      port: port,
+      username: username,
+      privateKey: privateKey,
+    );
+
+    state = [...state, connection];
+    await _saveToDisk();
+  }
+
+  Future<void> removeConnection(String id) async {
+    state = state.where((c) => c.id != id).toList();
+    await _saveToDisk();
+  }
+
+  Future<void> _saveToDisk() async {
+    final prefs = await SharedPreferences.getInstance();
+    final jsonList = state.map((c) => c.toJson()).toList();
+    await prefs.setString(_kSavedConnectionsKey, jsonEncode(jsonList));
+  }
+}
+
+final savedConnectionsProvider = StateNotifierProvider<SavedConnectionsNotifier, List<SavedConnection>>((ref) {
+  return SavedConnectionsNotifier();
+});