Refactored RealtimeService using WorkManager

onebusaway-android/src/main/java/org/onebusaway/android/directions/realtime/RealTimeWorker.java

@@ -0,0 +1,196 @@
+package org.onebusaway.android.directions.realtime;
+
+import org.onebusaway.android.R;
+import org.onebusaway.android.app.Application;
+import org.onebusaway.android.directions.model.ItineraryDescription;
+import org.onebusaway.android.directions.tasks.TripRequest;
+import org.onebusaway.android.directions.util.OTPConstants;
+import org.onebusaway.android.directions.util.TripRequestBuilder;
+import org.opentripplanner.api.model.Itinerary;
+import org.opentripplanner.api.model.TripPlan;
+
+import android.app.Activity;
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.os.Bundle;
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.List;
+
+import androidx.core.app.NotificationCompat;
+import androidx.work.WorkManager;
+import androidx.work.Worker;
+import androidx.work.WorkerParameters;
+
+public class RealTimeWorker extends Worker {
+    private static final String TAG = "RealTimeWorker";
+    private static final String ITINERARY_DESC = ".ItineraryDesc";
+    private static final String ITINERARY_END_DATE = ".ItineraryEndDate";
+    private Result mResult = Result.success();
+
+    public RealTimeWorker(@androidx.annotation.NonNull Context context, @androidx.annotation.NonNull WorkerParameters workerParams) {
+        super(context, workerParams);
+    }
+
+    @androidx.annotation.NonNull
+    @Override
+    public Result doWork() {
+        Bundle bundle = RealtimeService.toBundle(getInputData());
+        Log.d(TAG, bundle.toString()+" Worker");
+
+        checkForItineraryChange(bundle);
+        return mResult;
+    }
+    private void checkForItineraryChange(final Bundle bundle) {
+        TripRequestBuilder builder = TripRequestBuilder.initFromBundleSimple(bundle);
+        ItineraryDescription desc = getItineraryDescription(bundle);
+        Class target = getNotificationTarget(bundle);
+        if (target == null) {
+            disableListenForTripUpdates();
+            return;
+        }
+        checkForItineraryChange(target, builder, desc);
+    }
+    private void checkForItineraryChange(final Class<? extends Activity> source, final TripRequestBuilder builder, final ItineraryDescription itineraryDescription) {
+
+        Log.d(TAG, "Check for change");
+
+        TripRequest.Callback callback = new TripRequest.Callback() {
+            @Override
+            public void onTripRequestComplete(TripPlan tripPlan, String url) {
+                if (tripPlan == null || tripPlan.itineraries == null || tripPlan.itineraries.isEmpty()) {
+                    onTripRequestFailure(-1, null);
+                    return;
+                }
+
+                // Check each itinerary. Notify user if our *current* itinerary doesn't exist
+                // or has a lower rank.
+                for (int i = 0; i < tripPlan.itineraries.size(); i++) {
+                    ItineraryDescription other = new ItineraryDescription(tripPlan.itineraries.get(i));
+
+                    if (itineraryDescription.itineraryMatches(other)) {
+
+                        long delay = itineraryDescription.getDelay(other);
+                        Log.d(TAG, "Schedule deviation on itinerary: " + delay);
+
+                        if (Math.abs(delay) > OTPConstants.REALTIME_SERVICE_DELAY_THRESHOLD) {
+                            Log.d(TAG, "Notify due to large early/late schedule deviation.");
+                            showNotification(itineraryDescription,
+                                    (delay > 0) ? R.string.trip_plan_delay
+                                            : R.string.trip_plan_early,
+                                    R.string.trip_plan_notification_new_plan_text,
+                                    source, builder.getBundle(), tripPlan.itineraries);
+                            disableListenForTripUpdates();
+                            return;
+                        }
+
+                        // Otherwise, we are still good.
+                        Log.d(TAG, "Itinerary exists and no large schedule deviation.");
+                        checkDisableDueToTimeout(itineraryDescription);
+
+                        return;
+                    }
+                }
+                Log.d(TAG, "Did not find a matching itinerary in new call - notify user that something has changed.");
+                showNotification(itineraryDescription,
+                        R.string.trip_plan_notification_new_plan_title,
+                        R.string.trip_plan_notification_new_plan_text, source,
+                        builder.getBundle(), tripPlan.itineraries);
+                disableListenForTripUpdates();
+            }
+
+            @Override
+            public void onTripRequestFailure(int result, String url) {
+                Log.e(TAG, "Failure checking itineraries. Result=" + result + ", url=" + url);
+                disableListenForTripUpdates();
+
+            }
+        };
+
+        builder.setListener(callback);
+
+        try {
+            builder.execute();
+        } catch (Exception e) {
+            e.printStackTrace();
+            disableListenForTripUpdates();
+        }
+    }
+    private void showNotification(ItineraryDescription description, int title, int message,
+                                  Class<? extends Activity> notificationTarget,
+                                  Bundle params, List<Itinerary> itineraries) {
+
+        String titleText = Resources.getSystem().getString(title);
+        String messageText = Resources.getSystem().getString(message);
+
+        Intent openIntent = new Intent(getApplicationContext(), notificationTarget);
+        openIntent.putExtras(params);
+        openIntent.putExtra(OTPConstants.INTENT_SOURCE, OTPConstants.Source.NOTIFICATION);
+        openIntent.putExtra(OTPConstants.ITINERARIES, (ArrayList<Itinerary>) itineraries);
+        openIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
+        int flags;
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {
+            flags = PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_MUTABLE;
+        } else {
+            flags = PendingIntent.FLAG_CANCEL_CURRENT;
+        }
+        PendingIntent openPendingIntent = PendingIntent
+                .getActivity(getApplicationContext(),
+                        0,
+                        openIntent,
+                        flags);
+
+        NotificationCompat.Builder mBuilder =
+                new NotificationCompat.Builder(getApplicationContext(), Application.CHANNEL_TRIP_PLAN_UPDATES_ID)
+                        .setSmallIcon(R.drawable.ic_stat_notification)
+                        .setContentTitle(titleText)
+                        .setStyle(new NotificationCompat.BigTextStyle().bigText(messageText))
+                        .setContentText(messageText)
+                        .setPriority(NotificationCompat.PRIORITY_MAX)
+                        .setContentIntent(openPendingIntent);
+
+        NotificationManager notificationManager =
+                (NotificationManager) getApplicationContext()
+                        .getSystemService(Context.NOTIFICATION_SERVICE);
+        Notification notification = mBuilder.build();
+        notification.defaults = Notification.DEFAULT_ALL;
+        notification.flags |= Notification.FLAG_AUTO_CANCEL | Notification.FLAG_SHOW_LIGHTS;
+
+        Integer notificationId = description.getId();
+        notificationManager.notify(notificationId, notification);
+    }
+    private void disableListenForTripUpdates() {
+        Log.d(TAG, "disabled");
+        mResult = Result.failure();
+        WorkManager.getInstance().getWorkInfosForUniqueWork(OTPConstants.REALTIME_UNIQUE_WORKER_NAME).cancel(true);
+
+    }
+    private void checkDisableDueToTimeout(ItineraryDescription itineraryDescription) {
+        if (itineraryDescription.isExpired()) {
+            Log.d(TAG, "End of trip has passed.");
+            disableListenForTripUpdates();
+        }
+    }
+    private ItineraryDescription getItineraryDescription(Bundle bundle) {
+        String ids[] = bundle.getStringArray(ITINERARY_DESC);
+        long date = bundle.getLong(ITINERARY_END_DATE);
+        return new ItineraryDescription(Arrays.asList(ids), new Date(date));
+    }
+
+    private Class getNotificationTarget(Bundle bundle) {
+        try {
+            Class target = bundle.getSerializable(OTPConstants.NOTIFICATION_TARGET).getClass();
+            return target;
+        } catch(Exception e) {
+            Log.e(TAG, e.toString());
+        }
+        return null;
+    }
+}