//
//  Class:			IDatabaseEntity
//	Current CLR:	4.0.30319.34209
//	System:			Microsoft Visual Studio 10.0
//	Author:			dani
// 	Created:		3/2/2015 9:08:47 PM
//
//	Copyright (c) 2015 Informatikbüro Daniel Schick. All rights reserved.

using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Generic;

namespace bsmd.database
{    

    public abstract class DatabaseEntity
    {
        protected Guid? id;

        protected string tablename;

        /// <summary>
        /// SQL Table name to construct queries
        /// </summary>
        public string Tablename { get { return this.tablename; } }

        /// <summary>
        /// primary key
        /// </summary>        
        public Guid? Id { get { return this.id;  } }

        /// <summary>
        /// IsNew Flag
        /// </summary>
        public bool IsNew { get { return !this.id.HasValue; } }

        public virtual void PrepareSave(IDbCommand cmd) { }

        public virtual void PrepareDelete(IDbCommand cmd) 
        {
            SqlCommand scmd = cmd as SqlCommand;
            scmd.CommandText = string.Format("DELETE FROM {0} WHERE Id = @ID", Tablename);
            scmd.Parameters.AddWithValue("@ID", this.Id);
        }

        public abstract void PrepareLoadCommand(IDbCommand cmd, Message.LoadFilter filter, params object[] criteria);

        public abstract List<DatabaseEntity> LoadList(IDataReader reader);
    }
}