✨ Sign in & Sign up redirection

lib/providers/auth.dart

@@ -0,0 +1,132 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import 'package:solian/screens/auth.dart';
+import 'package:oauth2/oauth2.dart' as oauth2;
+import 'package:solian/utils/service_url.dart';
+
+final authClient = AuthProvider();
+
+class AuthProvider {
+  AuthProvider();
+
+  final deviceEndpoint =
+      getRequestUri('passport', '/api/notifications/subscribe');
+  final authorizationEndpoint = getRequestUri('passport', '/auth/o/connect');
+  final tokenEndpoint = getRequestUri('passport', '/api/auth/token');
+  final userinfoEndpoint = getRequestUri('passport', '/api/users/me');
+  final redirectUrl = Uri.parse('solian://auth');
+
+  static const clientId = "solian";
+  static const clientSecret = "_F4%q2Eea3";
+
+  static const storage = FlutterSecureStorage();
+  static const storageKey = "identity";
+  static const profileKey = "profiles";
+
+  oauth2.Client? client;
+  DateTime? lastRefreshedAt;
+
+  Future<bool> pickClient() async {
+    if (await storage.containsKey(key: storageKey)) {
+      try {
+        var credentials =
+            oauth2.Credentials.fromJson((await storage.read(key: storageKey))!);
+        client = oauth2.Client(credentials,
+            identifier: clientId, secret: clientSecret);
+        await fetchProfiles();
+        return true;
+      } catch (e) {
+        signOff();
+        return false;
+      }
+    } else {
+      return false;
+    }
+  }
+
+  Future<oauth2.Client> createClient(BuildContext context) async {
+    // If logged in
+    if (await pickClient()) {
+      return client!;
+    }
+
+    var grant = oauth2.AuthorizationCodeGrant(
+      clientId,
+      authorizationEndpoint,
+      tokenEndpoint,
+      secret: clientSecret,
+      basicAuth: false,
+    );
+
+    var authorizationUrl = grant.getAuthorizationUrl(redirectUrl, scopes: ["openid"]);
+
+    if (Platform.isAndroid || Platform.isIOS) {
+      // Use WebView to get authorization url
+      var responseUrl = await Navigator.of(context, rootNavigator: true).push(
+        MaterialPageRoute(
+          builder: (context) => AuthorizationScreen(authorizationUrl),
+        ),
+      );
+
+      var responseUri = Uri.parse(responseUrl);
+      return await grant
+          .handleAuthorizationResponse(responseUri.queryParameters);
+    } else {
+      throw UnimplementedError("unsupported platform");
+    }
+  }
+
+  Future<void> fetchProfiles() async {
+    if (client != null) {
+      var userinfo = await client!.get(userinfoEndpoint);
+      storage.write(key: profileKey, value: utf8.decode(userinfo.bodyBytes));
+    }
+  }
+
+  Future<void> refreshToken() async {
+    if (client != null) {
+      var credentials = await client?.credentials.refresh(
+          identifier: clientId, secret: clientSecret, basicAuth: false);
+
+      storage.write(key: storageKey, value: credentials!.toJson());
+    }
+  }
+
+  Future<void> signIn(BuildContext context) async {
+    client = await createClient(context);
+    storage.write(key: storageKey, value: client!.credentials.toJson());
+
+    await fetchProfiles();
+  }
+
+  void signOff() {
+    storage.delete(key: profileKey);
+    storage.delete(key: storageKey);
+  }
+
+  Future<bool> isAuthorized() async {
+    const storage = FlutterSecureStorage();
+    if (await storage.containsKey(key: storageKey)) {
+      if (client != null) {
+        if (lastRefreshedAt == null ||
+            lastRefreshedAt!
+                .add(const Duration(minutes: 3))
+                .isAfter(DateTime.now())) {
+          await refreshToken();
+          lastRefreshedAt = DateTime.now();
+        }
+      }
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  Future<dynamic> getProfiles() async {
+    const storage = FlutterSecureStorage();
+    return jsonDecode(await storage.read(key: profileKey) ?? "{}");
+  }
+}

lib/providers/layout_provider.dart

@@ -1,10 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter_gen/gen_l10n/app_localizations.dart';
-
-class LayoutConfig {
-  String title = "Solian";
-
-  LayoutConfig(BuildContext context) {
-    title = AppLocalizations.of(context)!.solian;
-  }
-}