using System;
using System.Data;


using MyShop.DALFactory;
using MyShop.IDAL;
using MyShop.Model;

namespace MyShop.BLL
{
    public  class UserGroup
    {
        private IUserGroup dal = DataAccess.CreateUserGroup();

        public UserGroup() { }

        #region IUserGroup

        public int Add(UserGroupInfo model)
        {
            if (model == null)
            {
                return 0;
            }
            return dal.Add(model);
        }

        public int Delete(string filter)
        {
            if (string.IsNullOrEmpty(filter))
                return 0;
            return dal.Delete(filter);
        }

        public bool Exist(string filter)
        {
            filter = filter.Trim();
            if (string.IsNullOrEmpty(filter))
                return false;
            return dal.Exist(filter);
        }
        public DataSet GetDataSet()
        {
            return dal.GetDataSet();
        }

        public DataSet GetDataSet(string filter)
        {
            filter = filter.Trim();
            if (string.IsNullOrEmpty(filter))
                return null;
            return dal.GetDataSet(filter);
        }

        public UserGroupInfo GetModel(DataRow dr)
        {
            if (dr == null)
                return null;
            return dal.GetModel(dr);
        }

        private DataSet Query(string sql)
        {
            sql = sql.Trim();
            if (string.IsNullOrEmpty(sql))
                return null;
            return dal.Query(sql);
        }

        public int Update(UserGroupInfo model, string filter)
        {
            if (model == null)
                return 0;
            filter = filter.Trim();
            if (string.IsNullOrEmpty(filter))
                return 0;
            return dal.Update(model, filter);
        }

        #endregion

        #region common

        public int Add(UserGroupInfo model, out string msg)
        {
            msg = "";
            if (model == null)
            {
                msg = msg + "<li>数据不能为空</li>";
                return 0;
            }

            bool isErr = false;

            if (string.IsNullOrEmpty(model.groupName.Trim()))
            {
                msg = msg + "请输入类型名称";
                isErr = true;
            }

            if (isErr)
                return 0;

            int count = 0;
            count = Add(model);
            if (count == 0)
                msg = "<li>系统发生错误,请重新添加!</li>";
            if (count == 1)
                msg = "<li>添加成功!</li>";
            return count;
        }

        public int Delete(int groupId)
        {
            if (string.IsNullOrEmpty(groupId.ToString()))
                return 0;
            string filer;
            filer = " groupId =" + groupId;
            return Delete(filer);
        }
        public int Update(UserGroupInfo model)
        {

            if (model == null)
            {
                return 0;
            }
            string filter;
            filter = "groupId=" + model.groupId;
            return Update(model, filter);
        }

        public UserGroupInfo GetModel(int groupId)
        {
            DataSet dataset = new DataSet();
            dataset = GetDataSet(" groupId=" + groupId);
            if (dataset != null)
                return GetModel(dataset.Tables[0].Rows[0]);
            return null;

        }

        #endregion
    }
}