UnsubscribeIntentService.java

/**
 * Copyright 2015 Google Inc. All Rights Reserved.
 * <p/>
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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 com.cusnews.gcm;

import java.io.IOException;

import android.app.IntentService;
import android.content.Intent;
import android.support.v4.content.LocalBroadcastManager;

import com.cusnews.utils.Prefs;
import com.google.android.gms.gcm.GcmPubSub;

public class UnsubscribeIntentService extends IntentService {
	public static final  String UNSUBSCRIBE_COMPLETE = "unsubscribeComplete";
	public static final  String TOPIC                = "topic";
	public static final  String UNSUBSCRIBE_RESULT   = "result";
	public static final  String UNSUBSCRIBE_NAME     = "name";
	public static final  String STORAGE_NAME         = "storage_name";
	private static final String TAG                  = "UnsubscribeIntentService";

	public UnsubscribeIntentService() {
		super( TAG );
	}

	@Override
	protected void onHandleIntent( Intent intent ) {
		Prefs  prefs               = Prefs.getInstance();
		Intent unsubscribeComplete = new Intent( UNSUBSCRIBE_COMPLETE );
		String token               = Prefs.getInstance().getPushToken();
		String topic               = intent.getStringExtra( TOPIC );
		String storage             = intent.getStringExtra( STORAGE_NAME );
		unsubscribeComplete.putExtra( UNSUBSCRIBE_NAME, intent.getStringExtra( UNSUBSCRIBE_NAME ) );
		try {
			synchronized( TAG ) {
				unsubscribeTopics( token, topic );
				prefs.setPush( storage, false );
				unsubscribeComplete.putExtra( UNSUBSCRIBE_RESULT, true );
			}
		} catch( Exception e ) {
			prefs.setPush( storage, true );
			unsubscribeComplete.putExtra( UNSUBSCRIBE_RESULT, false );
		}
		LocalBroadcastManager.getInstance( this ).sendBroadcast( unsubscribeComplete );
	}


	/**
	 * Unsubscribe to any GCM topics of interest, as defined by the TOPICS constant.
	 *
	 * @param token
	 * 		GCM token
	 * @param topic
	 * 		The topic-name that have been subscribed.
	 *
	 * @throws IOException
	 * 		if unable to reach the GCM PubSub service
	 */
	// [START subscribe_topics]
	private void unsubscribeTopics( String token, String topic ) throws IOException {
		GcmPubSub pubSub = GcmPubSub.getInstance( this );
		pubSub.unsubscribe( token, "/topics/" + topic );
	}
}