/**
* Global Sensor Networks (GSN) Source Code
* Copyright (c) 2006-2016, Ecole Polytechnique Federale de Lausanne (EPFL)
* 
* This file is part of GSN.
* 
* GSN is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* 
* GSN is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
* 
* You should have received a copy of the GNU General Public License
* along with GSN.  If not, see <http://www.gnu.org/licenses/>.
* 
* File: app/service/gsn/GSNUSerServicePlugin.java
*
* @author Julien Eberle
*
*/
package service.gsn;

import models.gsn.auth.User;
import play.Application;

import com.feth.play.module.pa.user.AuthUser;
import com.feth.play.module.pa.user.AuthUserIdentity;
import com.feth.play.module.pa.service.UserServicePlugin;
import com.google.inject.Inject;

public class GSNUserServicePlugin extends UserServicePlugin {

	@Inject
	public GSNUserServicePlugin(final Application app) {
		super(app);
	}

	@Override
	public Object save(final AuthUser authUser) {
		final boolean isLinked = User.existsByAuthUserIdentity(authUser);
		if (!isLinked) {
			return User.create(authUser).id;
		} else {
			// we have this user already, so return null
			return null;
		}
	}

	@Override
	public Object getLocalIdentity(final AuthUserIdentity identity) {
		// For production: Caching might be a good idea here...
		// ...and dont forget to sync the cache when users get deactivated/deleted
		final User u = User.findByAuthUserIdentity(identity);
		if(u != null) {
			return u.id;
		} else {
			return null;
		}
	}

	@Override
	public AuthUser merge(final AuthUser newUser, final AuthUser oldUser) {
		if (!oldUser.equals(newUser)) {
			User.merge(oldUser, newUser);
		}
		return oldUser;
	}

	@Override
	public AuthUser link(final AuthUser oldUser, final AuthUser newUser) {
		User.addLinkedAccount(oldUser, newUser);
		return newUser;
	}
	
	@Override
	public AuthUser update(final AuthUser knownUser) {
		// User logged in again, bump last login date
		User.setLastLoginDate(knownUser);
		return knownUser;
	}

}