Fix issue #482 - Warn when the app fails to add account into a list

app/src/main/java/app/fedilab/android/activities/ProfileActivity.java

@@ -857,14 +857,22 @@ public class ProfileActivity extends BaseActivity {
                                                         relationship = newRelationShip;
                                                         updateAccount();
                                                         if (isChecked) {
-                                                            timelinesVM.addAccountsList(BaseMainActivity.currentInstance, BaseMainActivity.currentToken, listsId[which], userIds);
+                                                            timelinesVM.addAccountsList(BaseMainActivity.currentInstance, BaseMainActivity.currentToken, listsId[which], userIds).observe(ProfileActivity.this, success -> {
+                                                                if (!success) {
+                                                                    Toasty.error(ProfileActivity.this, getString(R.string.toast_error_add_to_list), Toast.LENGTH_LONG).show();
+                                                                }
+                                                            });
                                                         } else {
                                                             timelinesVM.deleteAccountsList(BaseMainActivity.currentInstance, BaseMainActivity.currentToken, listsId[which], userIds);
                                                         }
                                                     });
                                         } else {
                                             if (isChecked) {
-                                                timelinesVM.addAccountsList(BaseMainActivity.currentInstance, BaseMainActivity.currentToken, listsId[which], userIds);
+                                                timelinesVM.addAccountsList(BaseMainActivity.currentInstance, BaseMainActivity.currentToken, listsId[which], userIds).observe(ProfileActivity.this, success -> {
+                                                    if (!success) {
+                                                        Toasty.error(ProfileActivity.this, getString(R.string.toast_error_add_to_list), Toast.LENGTH_LONG).show();
+                                                    }
+                                                });
                                             } else {
                                                 timelinesVM.deleteAccountsList(BaseMainActivity.currentInstance, BaseMainActivity.currentToken, listsId[which], userIds);
                                             }

app/src/main/java/app/fedilab/android/client/endpoints/MastodonTimelinesService.java

@@ -179,7 +179,7 @@ public interface MastodonTimelinesService {
     //Add account in a list
     @FormUrlEncoded
     @POST("lists/{id}/accounts")
-    Call<Void> addAccountsList(
+    Call<Boolean> addAccountsList(
             @Header("Authorization") String token,
             @Path("id") String id,
             @Field("account_ids[]") List<String> account_ids

app/src/main/java/app/fedilab/android/viewmodel/mastodon/TimelinesVM.java

@@ -74,6 +74,7 @@ public class TimelinesVM extends AndroidViewModel {
 
 
     private MutableLiveData<List<Account>> accountListMutableLiveData;
+    private MutableLiveData<Boolean> booleanMutableLiveData;
     private MutableLiveData<List<StatusDraft>> statusDraftListMutableLiveData;
     private MutableLiveData<Status> statusMutableLiveData;
     private MutableLiveData<Statuses> statusesMutableLiveData;
@@ -838,18 +839,26 @@ public class TimelinesVM extends AndroidViewModel {
      * @param listId     ID of the list
      * @param accountIds Array of account IDs to add to the list.
      */
-    public void addAccountsList(@NonNull String instance, String token, @NonNull String listId, @NonNull List<String> accountIds) {
+    public LiveData<Boolean> addAccountsList(@NonNull String instance, String token, @NonNull String listId, @NonNull List<String> accountIds) {
         MastodonTimelinesService mastodonTimelinesService = init(instance);
+        booleanMutableLiveData = new MutableLiveData<>();
         new Thread(() -> {
-            Call<Void> addAccountsListCall = mastodonTimelinesService.addAccountsList(token, listId, accountIds);
+            Call<Boolean> addAccountsListCall = mastodonTimelinesService.addAccountsList(token, listId, accountIds);
+            Boolean reply = null;
             if (addAccountsListCall != null) {
                 try {
-                    addAccountsListCall.execute();
+                    Response<Boolean> response = addAccountsListCall.execute();
+                    reply = response.isSuccessful();
                 } catch (Exception e) {
                     e.printStackTrace();
                 }
             }
+            Handler mainHandler = new Handler(Looper.getMainLooper());
+            Boolean finalReply = reply;
+            Runnable myRunnable = () -> booleanMutableLiveData.setValue(finalReply);
+            mainHandler.post(myRunnable);
         }).start();
+        return booleanMutableLiveData;
     }
 
     /**

app/src/main/res/values/strings.xml

@@ -1898,4 +1898,5 @@
     <string name="add_keyword">Add keyword</string>
     <string name="show_anyway">Show anyway</string>
     <string name="filtered_by">Filtered: %1$s</string>
+    <string name="toast_error_add_to_list">The app failed to add the account into the list!</string>
 </resources>