clean up

lib/pages/signin/signin_logic.dart

@@ -0,0 +1,31 @@
+import 'package:fcs/domain/entities/setting.dart';
+import 'package:fcs/domain/entities/user.dart';
+import 'package:fcs/pages/main/model/main_model.dart';
+import 'package:fcs/pages/signin/invitation_request_page.dart';
+import 'package:fcs/pages/signin/signup_page.dart';
+import 'package:fcs/pages/widgets/bottom_up_page_route.dart';
+import 'package:flutter/widgets.dart';
+import 'package:provider/provider.dart';
+
+navigateAfterAuthVerified(BuildContext context) async {
+  User user = Provider.of<MainModel>(context, listen: false).user;
+  Setting setting = Provider.of<MainModel>(context, listen: false).setting;
+
+  if (setting == null) return;
+
+  if (user != null && (user.joined || user.requested)) {
+    Navigator.pushNamedAndRemoveUntil(context, "/home", (r) => false);
+  } else {
+    if (setting.inviteRequired) {
+      bool invited =
+          await Provider.of<MainModel>(context, listen: false).hasInvite();
+      if (!invited) {
+        await Navigator.of(context).pushAndRemoveUntil(
+            BottomUpPageRoute(RequestInvitationPage()), (r) => false);
+        return;
+      }
+    }
+    await Navigator.of(context)
+        .pushAndRemoveUntil(BottomUpPageRoute(SignupPage()), (r) => false);
+  }
+}