SocialTokenManager.java

/**
Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET 

(SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp (IBM),
INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM 
ITALIA S.p.a.(TI), TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
   disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.societies.android.platform.socialdata;

import java.util.List;

import org.societies.android.api.internal.sns.ISocialTokenManager;
import org.societies.android.platform.MultiValueMap;
import org.societies.api.schema.sns.socialdata.model.SocialNetwork;
import org.societies.utilities.DBC.Dbc;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

/**
 * Social networks access token manager implementation for Android.
 *
 * @author Edgar Domingues (PTIN)
 *
 */
public class SocialTokenManager extends Service implements ISocialTokenManager {	

	private static final String LOG_TAG = SocialTokenManager.class.getName();

	private IBinder binder = null;
	private MultiValueMap<SocialNetwork, String> requests = new MultiValueMap<SocialNetwork, String>();
	
    @Override
	public void onCreate () {
		this.binder = new LocalBinder();

		Log.d(LOG_TAG, "AndroidSocialTokenManager service starting");
	}

	@Override
	public void onDestroy() {
		Log.d(LOG_TAG, "AndroidSocialTokenManager service terminating");
	}
    
	/**
	 * Create Binder object for local service invocation
	 */
	public class LocalBinder extends Binder {
		public SocialTokenManager getService() {
			return SocialTokenManager.this;
		}
	}
	
	@Override
	public IBinder onBind(Intent arg0) {
		return this.binder;
	}
	
	// Service API
	
	public synchronized void getToken(String client, SocialNetwork socialNetwork) {	
		Dbc.require("client cannot be null", client != null && client.length() > 0);
		Dbc.require("socialNetwork cannot be null", socialNetwork != null);		
		
		if(requests.containsKey(socialNetwork)) {
			requests.put(socialNetwork, client);
		}
		else {
			requests.put(socialNetwork, client);
			
			BridgeActivity.startActivityForSN(this, socialNetwork);
		}
	}
	
	// To receive token from BridgeActivity
	synchronized void returnToken(SocialNetwork socialNetwork, String token, String expires) {
		List<String> clients = requests.remove(socialNetwork);
		
		for(String client:clients) {
			sendReturnValue(client, socialNetwork, token, expires);
		}
	}
	
	private void sendReturnValue(String client, SocialNetwork socialNetwork, String token, String expires) {
		Intent intent = new Intent(GET_TOKEN);
		intent.putExtra(SOCIAL_NETWORK_KEY, socialNetwork.toString());
		intent.putExtra(INTENT_RETURN_KEY, token);
		intent.putExtra(EXTRA_EXPIRES, expires);
		intent.setPackage(client);
		sendBroadcast(intent);
	}
	
}