proper self-profile handling when offline; close #1328

app/src/main/java/awais/instagrabber/fragments/main/ProfileFragment.java

@@ -692,6 +692,11 @@ public class ProfileFragment extends Fragment implements SwipeRefreshLayout.OnRe
                 if (userResource == null) return;
                 final User user = userResource.data;
                 if (user == null) return;
+                username = user.getUsername();
+                if (TextUtils.isEmpty(username)) {
+                    appStateViewModel.fetchProfileDetails();
+                    return;
+                }
                 profileModel = user;
                 username = profileModel.getUsername();
                 setUsernameDelayed();
@@ -1099,7 +1104,7 @@ public class ProfileFragment extends Fragment implements SwipeRefreshLayout.OnRe
     }
 
     private void updateAccountInfo() {
-        if (profileModel == null) return;
+        if (profileModel == null || TextUtils.isEmpty(profileModel.getUsername())) return;
         accountRepository.insertOrUpdateAccount(
                 profileModel.getPk(),
                 profileModel.getUsername(),

app/src/main/java/awais/instagrabber/viewmodels/AppStateViewModel.java

@@ -51,7 +51,7 @@ public class AppStateViewModel extends AndroidViewModel {
         return currentUser;
     }
 
-    private void fetchProfileDetails() {
+    public void fetchProfileDetails() {
         currentUser.postValue(Resource.loading(null));
         final long uid = CookieUtils.getUserIdFromCookie(cookie);
         if (userRepository == null) {
@@ -61,7 +61,10 @@ public class AppStateViewModel extends AndroidViewModel {
         userRepository.getUserInfo(uid, CoroutineUtilsKt.getContinuation((user, throwable) -> {
             if (throwable != null) {
                 Log.e(TAG, "onFailure: ", throwable);
-                currentUser.postValue(Resource.error(throwable.getMessage(), null));
+                final User backup = currentUser.getValue().data != null ?
+                                        currentUser.getValue().data :
+                                        new User(uid);
+                currentUser.postValue(Resource.error(throwable.getMessage(), backup));
                 return;
             }
             currentUser.postValue(Resource.success(user));