package chat.server.moquette.message;

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

import io.netty.util.internal.StringUtil;

public class MqttUnsubscribePayload {

    private final List<String> topics;

    public MqttUnsubscribePayload(List<String> topics) {
        this.topics = Collections.unmodifiableList(topics);
    }

    public List<String> topics() {
        return topics;
    }

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