using System;
using System.Collections.Generic;

using CB.Cache;
using CB.Entity;

namespace CB.Data
{
    public partial class Caches
    {
        /// <summary>
        /// 获取文章分类列表
        /// </summary>
        /// <returns></returns>
        public static IList<TopicClassInfo> GetTopicClassList()
        {
            var cache = CBCache.GetCacheService();
            IList<TopicClassInfo> list = cache.GetObject(CacheKeys.TopicClasList) as IList<TopicClassInfo>;
            if (null == list)
            {
                list = TopicClassService.ToList();
                cache.AddObject(CacheKeys.TopicClasList, list);
            }
            return list;
        }

        /// <summary>
        /// 获取所有子文章分类
        /// </summary>
        /// <param name="parendId"></param>
        /// <returns></returns>
        public static IList<TopicClassInfo> GetTopicClassList(int parendId)
        {
            var list = GetTopicClassList();
            if (null == list || 0 >= list.Count)
                return null;

            IList<TopicClassInfo> r = new List<TopicClassInfo>();
            foreach (var item in list)
            {
                if (parendId == item.ParentId)
                    r.Add(item);
            }
            return r;
        }

        /// <summary>
        /// 获取文章分类详细
        /// </summary>
        /// <param name="aid"></param>
        /// <returns></returns>
        public static TopicClassInfo GetTopicClassInfo(int cid)
        {
            var list = GetTopicClassList();
            if (null == list || 0 >= list.Count)
                return null;

            TopicClassInfo entity = null;
            foreach (var item in list)
            {
                if (cid == item.Cid)
                {
                    entity = item; break;
                }
            }
            return entity;
        }
    }
}