Fixing Stage Variant Error (#904)

Author: KyletheWolff

android/app/src/staging/java/org/pathcheck/covidsafepaths/exposurenotifications/nearby/StateUpdatedWorker.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.pathcheck.covidsafepaths.exposurenotifications.nearby;
+
+import android.content.Context;
+import android.content.Intent;
+import android.util.Log;
+import androidx.annotation.NonNull;
+import androidx.work.ListenableWorker;
+import androidx.work.OneTimeWorkRequest;
+import androidx.work.WorkManager;
+import androidx.work.WorkerParameters;
+import com.facebook.react.bridge.ReactContext;
+import com.google.common.util.concurrent.FluentFuture;
+import com.google.common.util.concurrent.ListenableFuture;
+import org.pathcheck.covidsafepaths.MainApplication;
+import org.pathcheck.covidsafepaths.bridge.EventSender;
+import org.pathcheck.covidsafepaths.exposurenotifications.ExposureNotificationClientWrapper;
+import org.pathcheck.covidsafepaths.exposurenotifications.common.AppExecutors;
+import org.pathcheck.covidsafepaths.exposurenotifications.common.NotificationHelper;
+import org.pathcheck.covidsafepaths.exposurenotifications.storage.RealmSecureStorageBte;
+
+
+/**
+ * Performs work for
+ * {@value com.google.android.gms.nearby.exposurenotification.ExposureNotificationClient#ACTION_EXPOSURE_STATE_UPDATED}
+ * broadcast from exposure notification API.
+ */
+public class StateUpdatedWorker extends ListenableWorker {
+  private static final String TAG = "StateUpdatedWorker";
+
+  private final Context context;
+
+  public StateUpdatedWorker(@NonNull Context context, @NonNull WorkerParameters workerParams) {
+    super(context, workerParams);
+    this.context = context;
+  }
+
+  @NonNull
+  @Override
+  public ListenableFuture<Result> startWork() {
+    Log.d(TAG, "Starting worker to get exposure windows, "
+        + "compare them with the exposures stored in the local database "
+        + "and show a notification if there is a new one");
+    return FluentFuture.from(ExposureNotificationClientWrapper.get(context).getDailySummaries())
+        .transform(RealmSecureStorageBte.INSTANCE::refreshWithDailySummaries, AppExecutors.getBackgroundExecutor())
+        .transform(exposureResult -> {
+
+          if (exposureResult.getNewExposureAdded()) {
+            Log.d(TAG, "New exposures found, showing a notification");
+            NotificationHelper.showPossibleExposureNotification(context);
+
+            MainApplication app = (MainApplication) getApplicationContext();
+            ReactContext reactContext = app.getReactNativeHost()
+                .getReactInstanceManager()
+                .getCurrentReactContext();
+
+            if (reactContext != null) {
+              EventSender.INSTANCE.sendExposureRecordUpdatedChangedEvent(reactContext, exposureResult.getExposures());
+            }
+
+          } else {
+            Log.d(TAG, "No new exposures found");
+          }
+          return Result.success();
+        }, AppExecutors.getLightweightExecutor())
+        .catching(Exception.class, exception -> {
+              Log.e(TAG, "Failure to update app state (tokens, etc) from exposure summary.", exception);
+              return Result.failure();
+              },
+            AppExecutors.getLightweightExecutor()
+        );
+  }
+
+  static void runOnce(Context context, Intent intent) {
+    WorkManager.getInstance(context).enqueue(
+        new OneTimeWorkRequest.Builder(StateUpdatedWorker.class)
+            .build());
+  }
+}