/**
 * Copyright 2015 ArcBees Inc.
 *
 * 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
 *
 * 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 com.arcbees.gaestudio.client.application.channel;

import java.util.Map;
import java.util.Set;

import javax.inject.Inject;

import com.arcbees.gaestudio.shared.channel.Topic;
import com.google.common.collect.ImmutableMap;
import com.google.gwt.json.client.JSONValue;

public class MessageHandlers {
    private final Map<Topic, MessageHandler> handlerMap;

    @Inject
    MessageHandlers(
            Set<MessageHandler> messageHandlers) {

        ImmutableMap.Builder<Topic, MessageHandler> builder = ImmutableMap.builder();
        for (MessageHandler messageHandler : messageHandlers) {
            builder.put(messageHandler.getTopic(), messageHandler);
        }

        handlerMap = builder.build();
    }

    public void handle(Topic topic, JSONValue payload) {
        MessageHandler messageHandler = handlerMap.get(topic);
        if (messageHandler != null) {
            messageHandler.handleMessage(payload);
        }
    }
}