fix oauth

lib/business_logic/auth/oauth.dart

@@ -22,13 +22,15 @@ class App {
       required this.website,
       required this.redirectUri});
   factory App.fromJson(Map<String, dynamic> json) {
-    return App(
+    final app = App(
         id: json["id"].toString(),
         name: json["name"].toString(),
         website: json["website"].toString(),
         redirectUri: json["redirect_uri"].toString(),
         clientId: json["client_id"].toString(),
         clientSecret: json["client_secret"].toString());
+    settings.saveApp(app);
+    return app;
   }
 }
 
@@ -57,6 +59,7 @@ Future<int> handleFullOauth() async {
     var server = await shelf_io.serve(handler, 'localhost', 1312);
     await pollCode();
     server.close();
+    await refreshToken();
     return 200;
   } catch (e) {
     return 400;
@@ -86,14 +89,16 @@ Future<http.Response> doOauthFlow() async {
 Future<http.Response> registerApp(String baseurl) async {
   //String url = baseurl Uri."api/v1/apps";
   Uri url = Uri.https(baseurl, "/api/v1/apps");
-  final response = await http.post(url,
-      headers: global.defaultHeaders,
-      body: jsonEncode({
-        'client_name': global.name,
-        'redirect_uris': "http://localhost:1312",
-        'scopes': "read write",
-        'website': global.website
-      }));
+  final response = await http.post(
+    url,
+    headers: global.defaultHeaders,
+    body: jsonEncode({
+      'client_name': global.name,
+      'redirect_uris': "http://localhost:1312",
+      'scopes': "read write follow push",
+      'website': global.website
+    }),
+  );
   return response;
 }
 
@@ -109,8 +114,35 @@ void openBrowserForAuthCode(String baseurl, App app) {
       // ignore: prefer_interpolation_to_compose_strings
       query: "client_id=" +
           app.clientId +
-          "&scope=read+write" +
+          "&scope=read+write+follow+push" +
           "&redirect_uri=http://localhost:1312" +
           "&response_type=code");
   launchUrl(url);
 }
+
+Future<int> refreshToken() async {
+  final authCode = await settings.loadAuthCode();
+  final appId = await settings.loadClientId();
+  final clientSecret = await settings.loadClientSecret();
+  final baseurl = await settings.loadInstanceUrl();
+
+  Uri url = Uri.https(baseurl, "/oauth/token");
+  final response = await http.post(
+    url,
+    headers: global.defaultHeaders,
+    body: jsonEncode({
+      'grant_type': "authorization_code",
+      'client_id': appId,
+      'client_secret': clientSecret,
+      'redirect_uri': "http://localhost:1312",
+      'scope': "read write follow push",
+      'code': authCode,
+    }),
+  );
+  if (response.statusCode == 200) {
+    final dec = jsonDecode(response.body);
+    final accessToken = dec["access_token"]!;
+    await settings.saveToken(accessToken);
+  }
+  return response.statusCode;
+}