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

namespace Basic.DAL
{
    /// <summary>
    /// 频道
    /// </summary>
    public partial class channel
    {
        /// <summary>
        /// 增加一条数据
        /// </summary>
        public int Add(Basic.Model.channel model)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("insert into tb_channel(");
            strSql.Append("class_id,title,guid,parent_id,class_list,class_layer,paixu,url,path,content,seo_title,seo_keywords,seo_description)");
            strSql.Append(" values (");
            strSql.Append("@class_id,@title,@guid,@parent_id,@class_list,@class_layer,@paixu,@url,@path,@content,@seo_title,@seo_keywords,@seo_description)");
            strSql.Append(";select @@IDENTITY");

            SqlParameter[] parameters = { 
                new SqlParameter("@class_id", SqlDbType.Int,10),
                new SqlParameter("@title", SqlDbType.NVarChar,100),
                new SqlParameter("@guid", SqlDbType.NVarChar,50),
                new SqlParameter("@parent_id", SqlDbType.Int,10),
                new SqlParameter("@class_list", SqlDbType.NVarChar,500),
                new SqlParameter("@class_layer", SqlDbType.Int,10),
                new SqlParameter("@paixu", SqlDbType.Int,10),
                new SqlParameter("@url", SqlDbType.NVarChar,255),
                new SqlParameter("@path", SqlDbType.NVarChar,255),
                new SqlParameter("@content", SqlDbType.NText,1073741823),
                new SqlParameter("@seo_title", SqlDbType.NVarChar,255),
                new SqlParameter("@seo_keywords", SqlDbType.NVarChar,255),
                new SqlParameter("@seo_description", SqlDbType.NVarChar,255)};
            parameters[0].Value = model.class_id;
            parameters[1].Value = model.title;
            parameters[2].Value = model.guid;
            parameters[3].Value = model.parent_id;
            parameters[4].Value = model.class_list;
            parameters[5].Value = model.class_layer;
            parameters[6].Value = model.paixu;
            parameters[7].Value = model.url;
            parameters[8].Value = model.path;
            parameters[9].Value = model.content;
            parameters[10].Value = model.seo_title;
            parameters[11].Value = model.seo_keywords;
            parameters[12].Value = model.seo_description;

            object obj = DbHelperSQL.GetSingle(strSql.ToString(), parameters);
            if (obj == null)
            {
                return 0;
            }
            else
            {
                return Convert.ToInt32(obj);
            }
        }

        /// <summary>
        /// 更新一条数据
        /// </summary>
        public bool Update(Basic.Model.channel model)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("update tb_channel set ");
            strSql.Append("class_id=@class_id,");
            strSql.Append("title=@title,");
            strSql.Append("guid=@guid,");
            strSql.Append("parent_id=@parent_id,");
            strSql.Append("class_list=@class_list,");
            strSql.Append("class_layer=@class_layer,");
            strSql.Append("paixu=@paixu,");
            strSql.Append("url=@url,");
            strSql.Append("path=@path,");
            strSql.Append("content=@content,");
            strSql.Append("seo_title=@seo_title,");
            strSql.Append("seo_keywords=@seo_keywords,");
            strSql.Append("seo_description=@seo_description");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@class_id", SqlDbType.Int,10),
                new SqlParameter("@title", SqlDbType.NVarChar,100),
                new SqlParameter("@guid", SqlDbType.NVarChar,50),
                new SqlParameter("@parent_id", SqlDbType.Int,10),
                new SqlParameter("@class_list", SqlDbType.NVarChar,500),
                new SqlParameter("@class_layer", SqlDbType.Int,10),
                new SqlParameter("@paixu", SqlDbType.Int,10),
                new SqlParameter("@url", SqlDbType.NVarChar,255),
                new SqlParameter("@path", SqlDbType.NVarChar,255),
                new SqlParameter("@content", SqlDbType.NText,1073741823),
                new SqlParameter("@seo_title", SqlDbType.NVarChar,255),
                new SqlParameter("@seo_keywords", SqlDbType.NVarChar,255),
                new SqlParameter("@seo_description", SqlDbType.NVarChar,255),
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = model.class_id;
            parameters[1].Value = model.title;
            parameters[2].Value = model.guid;
            parameters[3].Value = model.parent_id;
            parameters[4].Value = model.class_list;
            parameters[5].Value = model.class_layer;
            parameters[6].Value = model.paixu;
            parameters[7].Value = model.url;
            parameters[8].Value = model.path;
            parameters[9].Value = model.content;
            parameters[10].Value = model.seo_title;
            parameters[11].Value = model.seo_keywords;
            parameters[12].Value = model.seo_description;
            parameters[13].Value = model.id;
            int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 删除一条数据
        /// </summary>
        public bool Delete(int id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("delete from  tb_channel");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;
            int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 得到一个对象实体
        /// </summary>
        public Basic.Model.channel GetModel(int id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select top 1 id,class_id,title,guid,parent_id,class_list,class_layer,paixu,url,path,content,seo_title,seo_keywords,seo_description from tb_channel");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;
            Basic.Model.channel model = new Basic.Model.channel();
            DataSet ds = DbHelperSQL.Query(strSql.ToString(), parameters);
            if (ds.Tables[0].Rows.Count > 0)
            {
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["id"].ToString()))
                {
                    model.id = int.Parse(ds.Tables[0].Rows[0]["id"].ToString());
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["class_id"].ToString()))
                {
                    model.class_id = int.Parse(ds.Tables[0].Rows[0]["class_id"].ToString());
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["title"].ToString()))
                {
                    model.title = ds.Tables[0].Rows[0]["title"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["guid"].ToString()))
                {
                    model.guid = ds.Tables[0].Rows[0]["guid"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["parent_id"].ToString()))
                {
                    model.parent_id = int.Parse(ds.Tables[0].Rows[0]["parent_id"].ToString());
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["class_list"].ToString()))
                {
                    model.class_list = ds.Tables[0].Rows[0]["class_list"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["class_layer"].ToString()))
                {
                    model.class_layer = int.Parse(ds.Tables[0].Rows[0]["class_layer"].ToString());
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["paixu"].ToString()))
                {
                    model.paixu = int.Parse(ds.Tables[0].Rows[0]["paixu"].ToString());
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["url"].ToString()))
                {
                    model.url = ds.Tables[0].Rows[0]["url"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["path"].ToString()))
                {
                    model.path = ds.Tables[0].Rows[0]["path"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["content"].ToString()))
                {
                    model.content = ds.Tables[0].Rows[0]["content"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["seo_title"].ToString()))
                {
                    model.seo_title = ds.Tables[0].Rows[0]["seo_title"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["seo_keywords"].ToString()))
                {
                    model.seo_keywords = ds.Tables[0].Rows[0]["seo_keywords"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["seo_description"].ToString()))
                {
                    model.seo_description = ds.Tables[0].Rows[0]["seo_description"].ToString();
                }
                return model;
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// 取得所有类别列表
        /// </summary>
        /// <param name="parent_id">父ID</param>
        /// <param name="class_id">分类ID</param>
        /// <returns></returns>
        public DataTable GetList(int parent_id, int class_id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select * from tb_channel");
            strSql.Append(" where class_id=" + class_id + " order by paixu desc,id asc");
            DataSet ds = DbHelperSQL.Query(strSql.ToString());
            DataTable oldData = ds.Tables[0] as DataTable;
            if (oldData == null)
            {
                return null;
            }
            //复制结构
            DataTable newData = oldData.Clone();
            //调用迭代组合成DAGATABLE
            GetChilds(oldData, newData, parent_id, class_id);
            return newData;
        }

        /// <summary>
        /// 从内存中取得所有下级类别列表（自身迭代）
        /// </summary>
        private void GetChilds(DataTable oldData, DataTable newData, int parent_id, int channel_id)
        {
            DataRow[] dr = oldData.Select("parent_id=" + parent_id);
            for (int i = 0; i < dr.Length; i++)
            {
                //添加一行数据
                DataRow row = newData.NewRow();
                row["id"] = int.Parse(dr[i]["id"].ToString());
                row["class_id"] = int.Parse(dr[i]["class_id"].ToString());
                row["title"] = dr[i]["title"].ToString();
                row["guid"] = dr[i]["guid"].ToString();
                row["parent_id"] = int.Parse(dr[i]["parent_id"].ToString());
                row["class_list"] = dr[i]["class_list"].ToString();
                row["class_layer"] = int.Parse(dr[i]["class_layer"].ToString());
                row["paixu"] = int.Parse(dr[i]["paixu"].ToString());
                row["url"] = dr[i]["url"].ToString();
                row["path"] = dr[i]["path"].ToString();
                row["content"] = dr[i]["content"].ToString();
                row["seo_title"] = dr[i]["seo_title"].ToString();
                row["seo_keywords"] = dr[i]["seo_keywords"].ToString();
                row["seo_description"] = dr[i]["seo_description"].ToString();
                newData.Rows.Add(row);
                //调用自身迭代
                this.GetChilds(oldData, newData, int.Parse(dr[i]["id"].ToString()), channel_id);
            }
        }
        /// <summary>
        /// 修改一列数据
        /// </summary>
        public void UpdateField(int id, string strValue)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("update tb_channel set " + strValue);
            strSql.Append(" where id=" + id);
            DbHelperSQL.ExecuteSql(strSql.ToString());
        }
    }
}