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package com.neko233.skilltree.commons.reactive;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;

/**
 * set 触发 callback, get 不会
 * 线程不安全.
 * 灵感来源于响应式页面
 *
 * @author SolarisNeko
 * Date on 2023-01-02
 */
public class ReactiveData {

    private final List> listeners = new ArrayList<>();
    private T data;

    public ReactiveData(T data) {
        this.data = data;
    }

    public synchronized ReactiveData set(T data) {
        this.data = data;
        callback();
        return this;
    }


    public T get() {
        return this.data;
    }


    private void callback() {
        for (Consumer listener : listeners) {
            listener.accept(this.data);
        }
    }

    public ReactiveData addListener(Consumer listener) {
        this.listeners.add(listener);
        return this;
    }

    public ReactiveData removeListener(Consumer listener) {
        this.listeners.remove(listener);
        return this;
    }

    public ReactiveData clearAllListeners() {
        this.listeners.clear();
        return this;
    }

}