package chat.server.moquette.message;

import java.util.Collections;
import java.util.List;

import io.netty.util.internal.StringUtil;

public class MqttSubscribePayload {

    private final List<MqttTopicSubscription> topicSubscriptions;

    public MqttSubscribePayload(List<MqttTopicSubscription> topicSubscriptions) {
        this.topicSubscriptions = Collections.unmodifiableList(topicSubscriptions);
    }

    public List<MqttTopicSubscription> topicSubscriptions() {
        return topicSubscriptions;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder(StringUtil.simpleClassName(this)).append('[');
        for (int i = 0; i < topicSubscriptions.size() - 1; i++) {
            builder.append(topicSubscriptions.get(i)).append(", ");
        }
        builder.append(topicSubscriptions.get(topicSubscriptions.size() - 1));
        builder.append(']');
        return builder.toString();
    }
}