using System.Collections;
using System.Collections.Generic;
using UnityEngine;

/// <summary>
/// 一个WebRequest发送系统的基类
/// </summary>
public abstract class WebRequestServerBase : SystemBase {

    List<WebRequestBase> webRequestList = new List<WebRequestBase>();
    protected void AddWebRequest(WebRequestBase webRequest) {
        webRequestList.Add(webRequest);
        CheckQueue();
    }

    void CheckQueue() {
        if (webRequestList.Count == 0) {
            return;
        }
        StartCoroutine(SendRequest());
    }

    IEnumerator SendRequest() {
        ///加yield return null目的是将Web请求延迟到下一帧开始，避免web回复委托还没添加，web已经回复，导致错过信息
        yield return null;

        WebRequestBase webRequest = webRequestList[0];
        webRequestList.RemoveAt(0);
        yield return StartCoroutine(webRequest.SendRequest());
        CheckQueue();
    }

    public override void SystemStop() {
        base.SystemStop();
        StopAllCoroutines();
        webRequestList.Clear();
    }
}