/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *   http://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.apache.openmeetings.data.chat;

import java.util.Date;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.apache.openmeetings.persistence.beans.chat.ChatMessage;
import org.springframework.transaction.annotation.Transactional;

@Transactional
public class ChatDao {
	@PersistenceContext
	private EntityManager em;

	public ChatMessage get(long id) {
		return em.createNamedQuery("getChatMessageById", ChatMessage.class)
				.setParameter("id", id)
				.getSingleResult();
	}

	//TODO additional methods should be added to get messages by external email
	public List<ChatMessage> get(long userId, int start, int count) {
		return em.createNamedQuery("getChatMessagesByUser", ChatMessage.class)
				.setParameter("userId", userId)
				.setFirstResult(start)
				.setMaxResults(count)
				.getResultList();
	}

	public List<ChatMessage> get(int start, int count) {
		return em.createNamedQuery("getGlobalChatMessages", ChatMessage.class)
				.setFirstResult(start)
				.setMaxResults(count)
				.getResultList();
	}

	public ChatMessage update(ChatMessage entity) {
		entity.setSent(new Date());
		if (entity.getId() == 0) {
			em.persist(entity);
		}
		return entity;
	}

	public void delete(ChatMessage entity, long userId) {
		// TODO Auto-generated method stub
		
	}

}