///////////////////////////////////////////////////////////
//  
//  Implementation of Class WikiPageExistanceChecker
//  CSLA type: Read-only object
//  Created on: 23-Dec-2010
//  Object design: John 
//	Coded: 23-Dec-2010
///////////////////////////////////////////////////////////

using System;
using System.Data;
using CSLA.Data;
using GZTW.Data;
using CSLA;
using System.Threading;
using CSLA.Security;
using System.ComponentModel;



namespace GZTW.AyaNova.BLL
{
    //case 496
    /// <summary>
    ///Confirms the presence of an WikiPage
    ///in the AyaNova database
    /// </summary>
    [Serializable, EditorBrowsable(EditorBrowsableState.Never)]
    internal class WikiPageExistanceChecker : ReadOnlyBase
    {

        #region Attributes
        private bool mExists;
       
        #endregion

        #region Constructor

        /// <summary>
        /// Private constructor to prevent direct instantiation
        /// </summary>
        private WikiPageExistanceChecker()
        {

        }
        #endregion


        #region Static methods

        internal static bool WikiPageExists(Guid SourceObjectID)
        {

            return ((WikiPageExistanceChecker)DataPortal.Fetch(new Criteria(SourceObjectID))).mExists;

        }


        #endregion

        #region DAL DATA ACCESS
        /// 
        /// <param Bool="Criteria"></param>
        protected override void DataPortal_Fetch(object Criteria)
        {
            Criteria crit = (Criteria)Criteria;

            if (DBUtil.ToGuid(DBUtil.GetScalarFromSQLString(
                "SELECT aID FROM aWikiPage WHERE (AROOTOBJECTID = @ID)", crit.objectID
                )) == Guid.Empty)
                this.mExists = false;
            else
                this.mExists = true;
            
        }



        #endregion

        #region criteria
        /// <summary>
        /// Criteria for identifying existing object
        /// </summary>
        [Serializable]
        private class Criteria
        {

            public Guid objectID;
            public Criteria(Guid _objectID)
            {
                objectID = _objectID;
            }

        }
        #endregion

    }//end class

}//end namespace GZTW.AyaNova.BLL