.

app/src/main/java/com/dar/nbook/ZoomActivity.java

@@ -30,13 +30,18 @@ import androidx.viewpager2.adapter.FragmentStateAdapter;
 import androidx.viewpager2.widget.ViewPager2;
 
 import com.bumptech.glide.Priority;
+import com.dar.nbook.api.HttpCallback;
+import com.dar.nbook.api.HttpClient;
+import com.dar.nbook.api.HttpError;
 import com.dar.nbook.api.components.GenericGallery;
+import com.dar.nbook.api.response.HasInviteResponse;
 import com.dar.nbook.async.database.Queries;
 import com.dar.nbook.components.activities.GeneralActivity;
 import com.dar.nbook.components.views.ZoomFragment;
 import com.dar.nbook.files.GalleryFolder;
 import com.dar.nbook.settings.DefaultDialogs;
 import com.dar.nbook.settings.Global;
+import com.dar.nbook.settings.Login;
 import com.dar.nbook.utility.LogUtility;
 import com.dar.nbook.utility.Utility;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
@@ -139,14 +144,20 @@ public class ZoomActivity extends GeneralActivity {
                 pageCounter++;
                 if (pageCounter >= pageThreshold) {
                     pageCounter = 0;
-                    MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(ZoomActivity.this);
-                    builder.setTitle(R.string.share_to_your_friends);
-                    builder.setMessage(R.string.share_to_your_friends_message);
-                    builder.setPositiveButton(R.string.ok, (dialog, which) -> {
-                        Global.invite(ZoomActivity.this);
+                    HttpClient.request(HttpClient.getApiService().hasInvite(Login.getNUser().getId()), new HttpCallback<HasInviteResponse>() {
+                        @Override
+                        public void onSuccess(HasInviteResponse data) {
+                            if (!data.isHasInvite()) {
+                                showInviteDialog();
+                            }
+                        }
+
+                        @Override
+                        public void onFailure(HttpError<HasInviteResponse> error) {
+                            showInviteDialog();
+                        }
                     });
-                    builder.setCancelable(false);
-                    builder.show();
+
                 }
             }
         });
@@ -188,6 +199,17 @@ public class ZoomActivity extends GeneralActivity {
         seekBar.setProgress(page);
     }
 
+    private void showInviteDialog() {
+        MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(ZoomActivity.this);
+        builder.setTitle(R.string.share_to_your_friends);
+        builder.setMessage(R.string.share_to_your_friends_message);
+        builder.setPositiveButton(R.string.ok, (dialog, which) -> {
+            Global.invite(ZoomActivity.this);
+        });
+        builder.setCancelable(false);
+        builder.show();
+    }
+
     private void setUserInput(boolean enabled) {
         mViewPager.setUserInputEnabled(enabled);
     }

app/src/main/java/com/dar/nbook/api/ApiService.java

@@ -4,6 +4,7 @@ import com.dar.nbook.api.components.NUser;
 import com.dar.nbook.api.request.UserLogin;
 import com.dar.nbook.api.request.UserRegister;
 import com.dar.nbook.api.response.AppConfig;
+import com.dar.nbook.api.response.HasInviteResponse;
 import com.dar.nbook.api.response.LoginResponse;
 import com.dar.nbook.api.response.SysConfigResponse;
 
@@ -12,6 +13,7 @@ import retrofit2.http.Body;
 import retrofit2.http.GET;
 import retrofit2.http.Header;
 import retrofit2.http.POST;
+import retrofit2.http.Path;
 
 public interface ApiService {
 
@@ -26,4 +28,7 @@ public interface ApiService {
 
     @GET("users/my")
     Call<NUser> getMyUser(@Header("Authorization") String token);
+
+    @GET("users/{id}/hasInvite")
+    Call<HasInviteResponse> hasInvite(@Path("id") Integer id);
 }

app/src/main/java/com/dar/nbook/api/response/HasInviteResponse.java

@@ -0,0 +1,13 @@
+package com.dar.nbook.api.response;
+
+public class HasInviteResponse {
+    private boolean hasInvite;
+
+    public boolean isHasInvite() {
+        return hasInvite;
+    }
+
+    public void setHasInvite(boolean hasInvite) {
+        this.hasInvite = hasInvite;
+    }
+}