Discuz.Forum/ForumHots.cs

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using System;
using System.Text;
using System.Data;

using Discuz.Cache;
using Discuz.Config;
using Discuz.Common;
using Discuz.Entity;
using System.IO;
using System.Text.RegularExpressions;
using Discuz.Common.Generic;

namespace Discuz.Forum
{
    /// <summary>
    /// 热点管理类
    /// </summary>
    public class ForumHots
    {
        /// <summary>
        /// 获得帖子列表
        /// </summary>
        /// <param name="count">数量</param>
        /// <param name="views">最小浏览量</param>
        /// <param name="fid">板块ID</param>
        /// <param name="timetype">期限类型,一天、一周、一月、不限制</param>
        /// <param name="ordertype">排序类型,时间倒序、浏览量倒序、最后回复倒序</param>
        /// <param name="isdigest">是否精华</param>
        /// <param name="cachetime">缓存的有效期(单位:分钟)</param>
        /// <returns></returns>
        public static DataTable GetTopicList(ForumHotItemInfo forumHotItemInfo)
        {
            //防止恶意行为
            forumHotItemInfo.Cachetimeout = forumHotItemInfo.Cachetimeout == 0 ? 1 : forumHotItemInfo.Cachetimeout;
            forumHotItemInfo.Dataitemcount = forumHotItemInfo.Dataitemcount > 50 ? 50 : (forumHotItemInfo.Dataitemcount < 1 ? 1 : forumHotItemInfo.Dataitemcount);

            DataTable dt = new DataTable();

            if (forumHotItemInfo.Cachetimeout > 0)
                dt = DNTCache.GetCacheService().RetrieveObject("/Forum/ForumHostList-" + forumHotItemInfo.Id) as DataTable;

            if (dt == null)
            {
                //如果版块idlist设置为空，则默认读取所有可见板块的idlist
                string forumList = string.IsNullOrEmpty(forumHotItemInfo.Forumlist) ? Forums.GetVisibleForum() : forumHotItemInfo.Forumlist;
                string orderFieldName = Focuses.GetFieldName((TopicOrderType)Enum.Parse(typeof(TopicOrderType), forumHotItemInfo.Sorttype));

                dt = Discuz.Data.Topics.GetTopicList(forumHotItemInfo.Dataitemcount, -1, 0, "",
                    Focuses.GetStartDate((TopicTimeType)Enum.Parse(typeof(TopicTimeType), forumHotItemInfo.Datatimetype)),
                    orderFieldName, forumList, orderFieldName == "digest", false);

                if (forumHotItemInfo.Cachetimeout > 0)
                    DNTCache.GetCacheService().AddObject("/Forum/ForumHostList-" + forumHotItemInfo.Id, dt, forumHotItemInfo.Cachetimeout);
            }
            return dt;
        }

        /// <summary>
        /// 获取一个帖子的缓存
        /// </summary>