register app in ui

lib/business_logic/auth/oauth.dart

@@ -1,6 +1,9 @@
+import 'dart:convert';
+
 import 'package:http/http.dart' as http;
 import 'package:url_launcher/url_launcher.dart';
 import '../../global.dart' as global;
+import '../../business_logic/settings.dart' as settings;
 
 class App {
   late String clientSecret;
@@ -27,15 +30,26 @@ class App {
   }
 }
 
+Future<http.Response> askKnownServerForAppRegistration() async {
+  String url = await settings.loadInstanceUrl();
+  try {
+    return await registerApp(url);
+  } catch (e) {
+    return http.Response(jsonEncode({}), 404);
+  }
+}
+
 Future<http.Response> registerApp(String baseurl) async {
   //String url = baseurl Uri."api/v1/apps";
   Uri url = Uri.https(baseurl, "/api/v1/apps");
-  var response = await http.post(url, headers: global.defaultHeaders, body: {
-    'client_name': global.name,
-    'redirect_uris': "ietf:wg:oauth:2.0:oob",
-    'scopes': "read write",
-    'website': global.website
-  });
+  final response = await http.post(url,
+      headers: global.defaultHeaders,
+      body: jsonEncode({
+        'client_name': global.name,
+        'redirect_uris': "urn:ietf:wg:oauth:2.0:oob",
+        'scopes': "read write",
+        'website': global.website
+      }));
   return response;
 }
 

lib/business_logic/settings.dart

@@ -0,0 +1,30 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+enum Settings {
+  instanceUrl,
+  username,
+}
+
+void saveSetting(Settings setting, dynamic value) async {
+  final prefs = await SharedPreferences.getInstance();
+}
+
+Future<bool> saveInstanceUrl(String url) async {
+  final prefs = await SharedPreferences.getInstance();
+  return prefs.setString("instance-url", url);
+}
+
+Future<String> loadInstanceUrl() async {
+  final prefs = await SharedPreferences.getInstance();
+  String? possibleReturn = prefs.getString("instance-url");
+  if (possibleReturn == null) {
+    return "example.com";
+  } else {
+    return possibleReturn;
+  }
+}
+
+Future<bool> saveUsername(String username) async {
+  final prefs = await SharedPreferences.getInstance();
+  return prefs.setString("username", username);
+}