Add persistence to matrix Client

lib/login.dart

@@ -25,11 +25,10 @@ class _LoginPageState extends State<LoginPage> {
     });
 
     final provider = Provider.of<ZenithClientProvider>(context, listen: false);
-    final client = Client("zenith");
 
     try {
-      await client.checkHomeserver(Uri.parse(serverController.text));
-      await client.login(
+      await provider.client.checkHomeserver(Uri.parse(serverController.text));
+      await provider.client.login(
         LoginType.mLoginPassword,
         password: passwordController.text,
         identifier: AuthenticationUserIdentifier(user: usernameController.text),
@@ -54,7 +53,6 @@ class _LoginPageState extends State<LoginPage> {
       });
     }
 
-    provider.setClient(client);
     final prefs = await SharedPreferences.getInstance();
     prefs.setString("homeserver", serverController.text);
     prefs.setString("username", usernameController.text);

lib/main.dart

@@ -50,16 +50,14 @@ class _MyHomePageState extends State<MyHomePage> {
 
     if (!mounted) return;
     final provider = Provider.of<ZenithClientProvider>(context, listen: false);
-    final client = Client("zenith");
-    provider.setClient(client);
     setState(() {
       showRooms = true;
     });
 
     try {
-      await client.checkHomeserver(Uri.parse(homeserver));
-      if (!client.isLogged())
-        await client.login(LoginType.mLoginPassword,
+      await provider.client.checkHomeserver(Uri.parse(homeserver));
+      if (!provider.client.isLogged())
+        await provider.client.login(LoginType.mLoginPassword,
             password: password,
             identifier: AuthenticationUserIdentifier(user: username));
     } catch (error) {

lib/zenith_client_provider.dart

@@ -1,13 +1,13 @@
 import 'package:flutter/material.dart';
 import 'package:matrix/matrix.dart';
+import 'package:path_provider/path_provider.dart';
 
 class ZenithClientProvider extends ChangeNotifier {
-  late Client _client;
-
-  Client get client => _client;
-
-  void setClient(Client value) {
-    _client = value;
-    notifyListeners();
-  }
+  final client = Client("zenith", databaseBuilder: (_) async {
+    final dir =
+        await getApplicationSupportDirectory(); // Recommend path_provider package
+    final db = HiveCollectionsDatabase('matrix_example_chat', dir.path);
+    await db.open();
+    return db;
+  });
 }