powerfun-unity/Assets/Scripts/Scenes/Ride/Competiton/CompetitionRankingFactory.cs

using Assets.Scenes.Ride.Scripts.Model;
using Assets.Scenes.Ride.Scripts.Model.CyclingModels;
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Assets.Scenes.Ride.Scripts
{
    public class CompetitionRankingFactory : BaseListFactory
    {
        private bool isInit = false;
        private bool isnext = false;
        private List<CompetitionRankingSortModel> rankingList {get;set;}
        private AbstractPlayer currentPlayer { get; set; }
        private Text Title { get; set; }
        private Text OnlineUserNum { get; set; }
        private Text Rank { get; set; }
        private GameObject PreBtn { get; set; }
        private GameObject NextBtn { get; set; }

        protected override void Awake()
        {
            //base.Awake();
            scroll = transform.Find("List").gameObject;
            if (scroll != null)
            {
                UIManager.AddEvent(scroll, UnityEngine.EventSystems.EventTriggerType.EndDrag, OnEndDrag);
            }
            parent = scroll.transform.Find("Viewport/Content");
            cyclingController = FindObjectOfType<CyclingController>();
            playerController = FindObjectOfType<PlayerController>();
            currentPlayer = cyclingController.currentPlayer;
            nearByItem = Resources.Load<GameObject>("UI/Prefab/Match/CompetitionRankingItem");
            nearByMajorItem = Resources.Load<GameObject>("UI/Prefab/Match/CompetitionRankingMajorItem");
            Title = transform.Find("Title").GetComponent<Text>();
            OnlineUserNum = transform.Find("Head/OnlineUserNum").GetComponent<Text>();
            PreBtn = transform.Find("Pre").gameObject;//上一页
            NextBtn = transform.Find("Next").gameObject;//下一页
            Rank = transform.Find("Rank").GetComponent<Text>();
            UIManager.AddEvent(PreBtn, UnityEngine.EventSystems.EventTriggerType.PointerClick, PrePage);
            UIManager.AddEvent(NextBtn, UnityEngine.EventSystems.EventTriggerType.PointerClick, NextPage);
        }
        private void PrePage(BaseEventData baseEventData)
        {
            SetPreIndex();
            isInit = true;
            isnext = false;
            CreateList();
        }
        private void NextPage(BaseEventData baseEventData)
        {
            SetNextIndex();
            isInit = true;
            isnext = true;
            CreateList();
        }
        protected override void CreateList()
        {
            CompetitionModel s = cyclingController.cyclingController as CompetitionModel;
            var ss = s?.competitionRankingModel;
            rankingList = ss?.Sorts;

            if (rankingList == null) return;

            rankingList = rankingList.OrderByDescending(u => u.IsCompleted).ThenBy(d => d.CreateTime).ThenByDescending(d => d.EndDistance).ToList();
            //当前参赛总人数
            var totalCount = rankingList.Count();
            OnlineUserNum.text = " "+totalCount.ToString();
            //当前用户排名
            var currentIndex = rankingList.Where(c => c.UserId == cyclingController.currentPlayer.UserId).FirstOrDefault()?.Index ?? 0;
            totalPages = (pageSize>0?totalCount / pageSize:0) + (totalCount % pageSize> 0? 1:0);
            if (!isInit)
            {
                //当前用户在第几页
               pageIndex = (pageSize > 0 ? currentIndex / pageSize : 1) + (currentIndex % pageSize > 0 ? 1 : 0);
            }
            Rank.text = $"{pageIndex}/{totalPages}";
            var pagedList = rankingList.Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList();
            //删除
            var currentList = FindObjectsOfType<CompetitionRankingItem>();
            foreach (var item in currentList)
            {
                var e = pagedList.Where(c => c.UserId == item.UserId).FirstOrDefault();
                if (e == null)
                {
                    item.transform.gameObject.SetActive(false);//TODO：这里暂时不删除，删除对应的图片和脚本依赖这个对象；脚本提供一个dispose
                    bufferSize--;
                }
            }
            //创建或者新增
            for (int i = 0; i < pagedList.Count(); i++)
            {
                CreateOrUpdate(pagedList[i]);
            }
           
        }
        private void CreateOrUpdate(CompetitionRankingSortModel item)
        {
            var rankingList = FindObjectsOfType<CompetitionRankingItem>();
            foreach (var o in rankingList)
            {
                o.transform.SetAsFirstSibling();
            }
            var competitionRankingItem = rankingList.Where(c => c.UserId == item.UserId).FirstOrDefault();
            //如果当前有这个用户则更新没有则创建并setslibingindex
            if (competitionRankingItem == null)
            {
                //创建
                if (bufferSize < pageSize)
                {
                    //情况一：还有足够的buffer,直接创建
                    GameObject prefabItem = item.IsSelf ? nearByMajorItem : nearByItem;
                    GameObject newObj = (GameObject)Instantiate(prefabItem, parent);
                    competitionRankingItem = newObj.GetComponent<CompetitionRankingItem>();
                    bufferSize++;
                }
                else
                {
                    //情况二：没有足够的buffer，找到要被淘汰的buffer()最后一名
                    if (isnext) {
                        competitionRankingItem = rankingList.OrderBy(c => c.rank).FirstOrDefault();
                    }
                    else
                    {
                        competitionRankingItem = rankingList.OrderByDescending(c => c.rank).FirstOrDefault();
                    }
                }
            }

            competitionRankingItem.setUserId(item.UserId);
            competitionRankingItem.SetRank(item.Index);
            competitionRankingItem.setName(item.Name);
            competitionRankingItem.setRatio(item.KGWeight + "W/KG");
            competitionRankingItem.setSpeed(item.Speed.ToString() + "KM/H");
            competitionRankingItem.setHead(item.Headimage);
            var countryTexture = cyclingController.GetCountryImageByName(item.CountryImg);
            competitionRankingItem.setCountry(countryTexture);
            var near =  Math.Round((item.EndDistance - cyclingController.currentPlayer.TotalDistance)*1000);
            competitionRankingItem.setDistance(cyclingController.currentPlayer.UserId == item.UserId?"0M": near.ToString() + "M");
            competitionRankingItem.transform.SetSiblingIndex(item.Index);
        }
    }
}