basic oauth finally but also more dependencies

lib/business_logic/auth/oauth.dart

@@ -30,10 +30,13 @@ class App {
   }
 }
 
-Future<http.Response> askKnownServerForAppRegistration() async {
+Future<http.Response> doOauthFlow() async {
   String url = await settings.loadInstanceUrl();
   try {
-    return await registerApp(url);
+    http.Response response = await registerApp(url);
+    print(response.body);
+    openBrowserForAuthCode(url, App.fromJson(jsonDecode(response.body)));
+    return response;
   } catch (e) {
     return http.Response(jsonEncode({}), 404);
   }
@@ -46,7 +49,7 @@ Future<http.Response> registerApp(String baseurl) async {
       headers: global.defaultHeaders,
       body: jsonEncode({
         'client_name': global.name,
-        'redirect_uris': "urn:ietf:wg:oauth:2.0:oob",
+        'redirect_uris': "http://localhost:4040",
         'scopes': "read write",
         'website': global.website
       }));
@@ -54,14 +57,14 @@ Future<http.Response> registerApp(String baseurl) async {
 }
 
 void openBrowserForAuthCode(String baseurl, App app) {
-  Uri url = Uri.https(
-      baseurl,
+  Uri url = Uri(
+      scheme: "https",
+      path: "$baseurl/oauth/authorize",
       // ignore: prefer_interpolation_to_compose_strings
-      "/oauth/authorize"
-              "?client_id=" +
+      query: "client_id=" +
           app.clientId +
           "&scope=read+write" +
-          "&redirect_uri=urn:ietf:wg:oauth:2.0:oob" +
+          "&redirect_uri=http://localhost:4040" +
           "&response_type=code");
   launchUrl(url);
 }