using Sarand.Net.Standard.Base.App;
using Sarand.Net.Standard.Base.Core;
using Sarand.Net.Standard.Base.Bus;
using Sarand.Net.Standard.Base.Dbas;
using Sarand.Net.Standard.Base.Security;
using Sarand.Net.Standard.Dbas.Data;
using Sarand.Net.Standard.Dbas.Security.Internal;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Text;
using Sarand.Net.Standard.Base.Utils;

namespace Sarand.Net.Standard.Dbas.Security
{
	//=======================================================================
	partial class SaSecurityMgr_Dbas
	{
		//*******************************************************************
		//                    S e c u r i t y   L i n k s
		//*******************************************************************
		// Security Link exists.
		private String GetSecurityLinkFilter(SysId itemIdOwner, SysId itemIdTarget, SysId itemIdContext)
		{
			ClearErrorState();
			SaSecurityLink.Params prm = new SaSecurityLink.Params();
			prm.ItemIdsOwnerIncluded.Add(itemIdOwner);
			prm.ItemIdsTargetIncluded.Add(itemIdTarget);
			prm.ItemIdsContextIncluded.Add(itemIdContext);
			prm.StatusCat = SaSecurityLink.StatusCat.Any;
			return GetSecurityLinkQueryFilter(prm).Concat(" AND ", "(", ")");
		}
		public override bool SecurityLinkExistsByItemsIds(SysId itemIdOwner, SysId itemIdTarget, SysId itemIdContext)
		{
			ClearErrorState();
			return GetSecurityItemCount(GetSecurityLinkFilter(itemIdOwner, itemIdTarget, itemIdContext)) == 1;
		}

		//-------------------------------------------------------------------
		// Get Security Link.
		private SaSecurityLink GetSecurityLink(String filter)
		{
			ClearErrorState();
			if (GetSecurityLinkCount(filter) != 1) return null;
			SaSecurityLink securityLink = null;
			// Query data.
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					SaSecLink_Db dbSecurityLink = new SaSecLink_Db(DbInfo);
					dbSecurityLink.PopulateFrom(dbCommand, aliasSecurityLink, filter);
					securityLink = CreateSecurityLink(dbSecurityLink);
					PopulateFrom(dbSecurityLink, securityLink);
				}
				catch (Exception exc)
				{
					SetErrorState(ErrorMessage.DatabaseQueryException);
					SaLogger.Warn($"{SysUtil.Fn}\n\tQuery: {dbCommand.CommandText}\n\t{ExceptionUtil.GetErrorStateMessage(exc)}");
				}
			}
			return securityLink;
		}
		public override SaSecurityLink GetSecurityLinkByItemsIds(SysId itemIdOwner, SysId itemIdTarget, SysId itemIdContext)
		{
			ClearErrorState();
			return GetSecurityLink(GetSecurityLinkFilter(itemIdOwner, itemIdTarget, itemIdContext));
		}

		//-------------------------------------------------------------------
		// Create item.
		public override SaSecurityLink CreateSecurityLink(SysId itemIdOwner, SysId itemIdTarget, SysId itemIdContext)
		{
			ClearErrorState();
			return new SaSecurityLink_Dbas(itemIdOwner, itemIdTarget, itemIdContext, 0);
		}
		private SaSecurityLink CreateSecurityLink(SaSecLink_Db dbSecLink)
		{
			ClearErrorState();
			return new SaSecurityLink_Dbas(new SysId(dbSecLink._ItemOwner), new SysId(dbSecLink._ItemTarget), new SysId(dbSecLink._ItemContext), (ushort)dbSecLink._Flags);
		}

		//-------------------------------------------------------------------
		// Validate item.
		public override bool IsValidSecurityLinkData(SaSecurityLink.Data securityLinkData, SaSecurityLink.ErrField errField)
		{
			ClearErrorState();
			if (!base.IsValidSecurityLinkData(securityLinkData, errField)) return false;
			return true;
		}

		//-------------------------------------------------------------------
		// Insert item.
		public override bool InsertSecurityLink(SaSecurityLink securityLink, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			if (!IsValidSecurityLink(securityLink)) return false;
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					SaSecLink_Db dbSecurityLink = new SaSecLink_Db(DbInfo);
					PopulateTo(dbSecurityLink, securityLink, dbUpdateInfo);
					dbSecurityLink.ExecuteInsertCommand(dbCommand);
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return OK;
		}

		//-------------------------------------------------------------------
		// Update item.
		public override bool UpdateSecurityLink(SaSecurityLink securityLink, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			if (!IsValidSecurityLink(securityLink)) return false;
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					// Retrieve item.
					dbConnection.Open();
					SaSecLink_Db dbSecurityLink = new SaSecLink_Db(DbInfo);
					dbSecurityLink.PopulateFrom(dbCommand, aliasSecurityLink, GetSecurityLinkFilter(securityLink.ItemIdOwner, securityLink.ItemIdTarget, securityLink.ItemIdContext));
					// TODO SlmUpdateLogItemMonitor_SecurityLink updateLogMonitor = new SlmUpdateLogItemMonitor_SecurityLink(prsAssMov, dbUpdateInfo);
					// Update item.
					PopulateTo(dbSecurityLink, securityLink, dbUpdateInfo);
					dbSecurityLink.ExecuteUpdateCommand(dbCommand);
					// TODO updateLogMonitor.RecordUpdatedValues(pAssMov);
					// TODO updateLogMonitor.LogUpdates();
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return OK;
		}

		//-------------------------------------------------------------------
		// Delete item.
		public override bool SecurityLinkCanBeDeleted(SaSecurityLink securityLink)
		{
			ClearErrorState();
			if (!base.SecurityLinkCanBeDeleted(securityLink)) return false;
			return true;
		}
		public override bool DeleteSecurityLink(SaSecurityLink securityLink, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					// Retrieve item.
					dbConnection.Open();
					SaSecLink_Db dbSecurityLink = new SaSecLink_Db(DbInfo);
					dbSecurityLink.PopulateFrom(dbCommand, aliasSecurityLink, GetSecurityLinkFilter(securityLink.ItemIdOwner, securityLink.ItemIdTarget, securityLink.ItemIdContext));
					// Delete item.
					dbCommand.CommandType = System.Data.CommandType.Text;
					dbCommand.CommandText =
						"DELETE " + aliasSecurityLink + " FROM " + TableName_SecLink + " AS " + aliasSecurityLink +
						" WHERE " + GetSecurityLinkFilter(securityLink.ItemIdOwner, securityLink.ItemIdTarget, securityLink.ItemIdContext) + ";";
					dbCommand.ExecuteNonQuery();
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return OK;
		}

		//-------------------------------------------------------------------
		// Copy data properties to and from database.
		private void PopulateTo(SaSecLink_Db dbSecurityLink, SaSecurityLink securityLink, DbUpdateInfo dbUpdateInfo)
		{
			dbSecurityLink._ItemOwner = SysId.ToInt(securityLink.ItemIdOwner);
			dbSecurityLink._ItemTarget = SysId.ToInt(securityLink.ItemIdTarget);
			dbSecurityLink._ItemContext = SysId.ToInt(securityLink.ItemIdContext);
			dbSecurityLink._DayApplic = securityLink.DayApplicability;
			dbSecurityLink._DateApplicFrom = DateUtil.DateToInt32(securityLink.ApplicableFrom ?? DateTime.MinValue);
			dbSecurityLink._DateApplicTo = DateUtil.DateToInt32(securityLink.ApplicableTo ?? DateTime.MinValue);
			dbSecurityLink._Status = SacsSystem.GetStatusCode(securityLink.Status);
			dbSecurityLink._Flags = (short)securityLink.Flags;
			if (dbSecurityLink._CreateOn == DateTime.MinValue)
			{
				dbSecurityLink._CreateOn = DateTime.Now;
				dbSecurityLink._CreateBy = dbUpdateInfo.UserId.ToInt();
				dbSecurityLink._CreateHost = dbUpdateInfo.Host;
			}
			dbSecurityLink._UpdateOn = DateTime.Now;
			dbSecurityLink._UpdateBy = dbUpdateInfo.UserId.ToInt();
			dbSecurityLink._UpdateHost = dbUpdateInfo.Host;
		}
		private void PopulateFrom(SaSecLink_Db dbSecurityLink, SaSecurityLink securityLink)
		{
			//securityLink.Id = new SysId(dbSecurityLink._Id);
			//securityLink.ItemIdOwner = new SysId(dbSecurityLink._ItemOwner);
			//securityLink.ItemIdTarget = new SysId(dbSecurityLink._ItemTarget);
			//securityLink.ItemIdContext = new SysId(dbSecurityLink._ItemContext);
			securityLink.DayApplicability = dbSecurityLink._DayApplic;
			securityLink.ApplicableFrom = DateUtil.Int32ToDate(dbSecurityLink._DateApplicFrom ?? 0);
			securityLink.ApplicableTo = DateUtil.Int32ToDate(dbSecurityLink._DateApplicTo ?? 0);
			securityLink.Status = SacsSystem.GetStatusForCode(dbSecurityLink._Status);
			securityLink.SetCreateStamp(dbSecurityLink._CreateOn ?? DateTime.MinValue, new SysId(dbSecurityLink._CreateBy ?? 0), dbSecurityLink._CreateHost);
			securityLink.SetUpdateStamp(dbSecurityLink._UpdateOn ?? DateTime.MinValue, new SysId(dbSecurityLink._UpdateBy ?? 0), dbSecurityLink._UpdateHost);
			securityLink.AcceptChanges();
		}

		//-------------------------------------------------------------------
		// SecurityLink column definitions.
		private static readonly String aliasSecurityLink = "aSecLnk";
		private static readonly String aliasSecLnk_ItemOwner = "aSitOwn";
		private static readonly String aliasSecLnk_ItemTarget = "aSitTgt";
		private static readonly String colPrefixSecLnk_ItemOwner = "SitOwn_";
		private static readonly String colPrefixSecLnk_ItemTarget = "SitTgt_";
		private void SetSecurityLinkColDfn
			(ColumnDfn col, String caption, int width, SaSecurityDbDfn.ColumnIdx dbCol,
			ColumnAlignment align = ColumnAlignment.Default, DataValue.DataType dataType = DataValue.DataType.String,
			String alias = "", String prefix = "")
		{
			if (String.IsNullOrEmpty(alias) && SaSecurityDbDfn.GetTableForColumn(dbCol) == SaSecurityDbDfn.TableIdx.SaSecLink)
				alias = aliasSecurityLink;
			col.Set(caption, width, (int)dbCol, prefix + SaSecurityDbDfn.GetColumnName(dbCol, false), SaSecurityDbDfn.GetColumnNameQual(dbCol, alias), dataType, align);
		}
		public override ColumnDfn GetSecurityLinkColumnDfn(SaSecurityLink.Column columnId, string caption = "", int width = 0)
		{
			ColumnDfn columnDfn = new ColumnDfn((int)columnId, caption, width);
			switch (columnId)
			{
				case SaSecurityLink.Column.Pos:
					SetSecurityLinkColDfn(columnDfn, "Pos", 45, SaSecurityDbDfn.ColumnIdx.Unknown, ColumnAlignment.Right);
					columnDfn.SortMode = ColumnDfn.ColumnSortMode.Off;
					columnDfn.ReadOnly = true;
					columnDfn.Resizable = false;
					break;
				// Owner item.
				case SaSecurityLink.Column.ItemIdOwner:
					SetSecurityLinkColDfn(columnDfn, "Owner Id", 75, SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemOwner, ColumnAlignment.Right, DataValue.DataType.Long);
					break;
				case SaSecurityLink.Column.ItemOwner_Code:
					SetSecurityLinkColDfn(columnDfn, "Owner code", 80, SaSecurityDbDfn.ColumnIdx.SaSecItem_Code, ColumnAlignment.Center, DataValue.DataType.String, aliasSecLnk_ItemOwner, colPrefixSecLnk_ItemOwner);
					break;
				case SaSecurityLink.Column.ItemOwner_Desc:
					SetSecurityLinkColDfn(columnDfn, "Owner desc", 100, SaSecurityDbDfn.ColumnIdx.SaSecItem_Description, ColumnAlignment.Left, DataValue.DataType.String, aliasSecLnk_ItemOwner, colPrefixSecLnk_ItemOwner);
					break;
				// Target item.
				case SaSecurityLink.Column.ItemIdTarget:
					SetSecurityLinkColDfn(columnDfn, "Target Id", 75, SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemOwner, ColumnAlignment.Right, DataValue.DataType.Long);
					break;
				case SaSecurityLink.Column.ItemTarget_Code:
					SetSecurityLinkColDfn(columnDfn, "Target code", 80, SaSecurityDbDfn.ColumnIdx.SaSecItem_Code, ColumnAlignment.Center, DataValue.DataType.String, aliasSecLnk_ItemTarget, colPrefixSecLnk_ItemTarget);
					break;
				case SaSecurityLink.Column.ItemTarget_Desc:
					SetSecurityLinkColDfn(columnDfn, "Target desc", 100, SaSecurityDbDfn.ColumnIdx.SaSecItem_Description, ColumnAlignment.Left, DataValue.DataType.String, aliasSecLnk_ItemTarget, colPrefixSecLnk_ItemTarget);
					break;
				// Context item.
				case SaSecurityLink.Column.ItemIdContext:
					SetSecurityLinkColDfn(columnDfn, "Context Id", 75, SaSecurityDbDfn.ColumnIdx.Unknown, ColumnAlignment.Right, DataValue.DataType.Long);
					break;
				case SaSecurityLink.Column.ItemContext_Desc:
					SetSecurityLinkColDfn(columnDfn, "Context item", 120, SaSecurityDbDfn.ColumnIdx.Unknown);
					break;
				case SaSecurityLink.Column.DaysApplicable:
					SetSecurityLinkColDfn(columnDfn, "Days applicable", 100, SaSecurityDbDfn.ColumnIdx.SaSecLink_DayApplic, ColumnAlignment.Center, DataValue.DataType.String);
					break;
				case SaSecurityLink.Column.DateApplicableFrom:
					SetSecurityLinkColDfn(columnDfn, "Applic from", 90, SaSecurityDbDfn.ColumnIdx.SaSecLink_DateApplicFrom, ColumnAlignment.Center, DataValue.DataType.Date);
					break;
				case SaSecurityLink.Column.DateApplicableTo:
					SetSecurityLinkColDfn(columnDfn, "Applic To", 90, SaSecurityDbDfn.ColumnIdx.SaSecLink_DateApplicTo, ColumnAlignment.Center, DataValue.DataType.Long);
					break;
				case SaSecurityLink.Column.Granted_Y:
					SetSecurityLinkColDfn(columnDfn, "Granted", 80, SaSecurityDbDfn.ColumnIdx.SaSecLink_Status, ColumnAlignment.Center);
					break;
				case SaSecurityLink.Column.Denied_X:
					SetSecurityLinkColDfn(columnDfn, "Denied", 80, SaSecurityDbDfn.ColumnIdx.SaSecLink_Status, ColumnAlignment.Center);
					break;
				case SaSecurityLink.Column.Status:
					SetSecurityLinkColDfn(columnDfn, "Status", 80, SaSecurityDbDfn.ColumnIdx.SaSecLink_Status, ColumnAlignment.Center);
					break;
				case SaSecurityLink.Column.Status_Desc:
					SetSecurityLinkColDfn(columnDfn, "Status", 90, SaSecurityDbDfn.ColumnIdx.SaSecLink_Status, ColumnAlignment.Center);
					break;
				case SaSecurityLink.Column.Status_Ind:
					SetSecurityLinkColDfn(columnDfn, "Status", 80, SaSecurityDbDfn.ColumnIdx.SaSecLink_Status, ColumnAlignment.Center, DataValue.DataType.TriState);
					columnDfn.TriStateFormat = ColumnTriStateFormat.Lights;
					break;
				case SaSecurityLink.Column.CreateOn_Date:
					SetSecurityLinkColDfn(columnDfn, "Created", 80, SaSecurityDbDfn.ColumnIdx.SaSecLink_CreateOn, ColumnAlignment.Center, DataValue.DataType.Date);
					columnDfn.ReadOnly = true;
					break;
				case SaSecurityLink.Column.UpdateOn_Date:
					SetSecurityLinkColDfn(columnDfn, "Updated", 80, SaSecurityDbDfn.ColumnIdx.SaSecLink_UpdateOn, ColumnAlignment.Center, DataValue.DataType.Date);
					columnDfn.ReadOnly = true;
					break;
			}
			if (!String.IsNullOrEmpty(caption))
				columnDfn.Caption = caption;
			if (width > 0)
				columnDfn.Width = width;
			return columnDfn;
		}

		//-------------------------------------------------------------------
		// SecurityLink query filter.
		public override List<string> GetSecurityLinkQueryFilter(SaSecurityLink.Params prm)
		{
			List<String> filter = new List<String>();

			// Force DBMS type.
			DbQuery qry = new DbQuery(Database.DbmsType);

			// Owner Item Ids.
			String colItemOwner = SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemOwner, aliasSecurityLink);
			String ownerItemIds = prm.ItemIdsOwnerIncluded.Concat(",");
			if (!ownerItemIds.IsEmpty())
				filter.Add(colItemOwner + " IN (" + ownerItemIds + ")");

			// Owner item type.
			if ((int)prm.OwnerItemType > 0)
				filter.Add(colItemOwner + " IN (SELECT " + SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecItem_Id) + " FROM " + TableName_SecItem + " WHERE " + SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecItem_Type) + "=" + ((int)prm.OwnerItemType).ToString() + ")");

			// Target Item Ids.
			String colItemTarget = SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemTarget, aliasSecurityLink);
			String targetItemIds = prm.ItemIdsTargetIncluded.Concat(",");
			if (!targetItemIds.IsEmpty())
				filter.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemTarget, aliasSecurityLink) + " IN (" + targetItemIds + ")");

			// Taregt item type.
			if ((int)prm.TargetItemType > 0)
				filter.Add(colItemTarget + " IN (SELECT " + SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecItem_Id) + " FROM " + TableName_SecItem + " WHERE " + SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecItem_Type) + "=" + ((int)prm.TargetItemType).ToString() + ")");

			// Context Item Ids.
			String contextItemIds = prm.ItemIdsContextIncluded.Concat(",");
			if (!contextItemIds.IsEmpty())
				filter.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemContext, aliasSecurityLink) + " IN (" + contextItemIds + ")");

			// Status.
			String colStatus = SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_Status, aliasSecurityLink);
			if (prm.StatusCat == SaSecurityLink.StatusCat.GrantedOnly)
				filter.Add(colStatus + "='" + SacsSystem.GetStatusCode(SaStatus.Granted) + "'");
			else if (prm.StatusCat == SaSecurityLink.StatusCat.DeniedOnly)
				filter.Add(colStatus + "='" + SacsSystem.GetStatusCode(SaStatus.Denied) + "'");

			if (filter.Count < 1 && prm.IncludeDefaultFilter) filter.Add("1=1");
			return filter;
		}
		// Security Link sort columns.
		public List<String> GetSecurityLinkSortColumns(SaSecurityLink.Params prm)
		{
			// Sort sequence:
			List<String> sortColumnNames = new List<String>();
			foreach (var columnDfn in prm.SortColumns)
			{
				// Need to ensure correct alias used for SecurityLink columns in case of conflict.
				String sortCol = String.Empty;
				if (SaSecurityDbDfn.GetTableForColumn((SaSecurityDbDfn.ColumnIdx)columnDfn.DbColumn) == SaSecurityDbDfn.TableIdx.SaSecLink)
				{
					sortCol = SaSecurityDbDfn.GetColumnNameQual((SaSecurityDbDfn.ColumnIdx)columnDfn.DbColumn, aliasSecurityLink);
				}
				else
				{
					sortCol = columnDfn.DataName;
					if (!StringUtil.IsEmpty(columnDfn.SortDataName))
					{
						sortCol = columnDfn.SortDataName;
					}
				}
				if (!sortCol.IsEmpty())
				{
					DbOrderByNullMode orderByNullMode = DbOrderByNullMode.Default; // eSaOrderByDemoteNulls, eSaOrderByPromoteNulls
					sortColumnNames.Add(DbQuery.FormatForOrderBy(sortCol, columnDfn.SortAscending, orderByNullMode).Concat(", "));
				}
			}
			sortColumnNames.RemoveBlanks();
			if (sortColumnNames.IsEmpty())
			{
				// Default sort columns:
				sortColumnNames.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemOwner, aliasSecurityLink) + " ASC");
				sortColumnNames.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemTarget, aliasSecurityLink) + " ASC");
			}
			return sortColumnNames;
		}

		//-------------------------------------------------------------------
		// SecurityLink count.
		private long GetSecurityLinkCount(String filter)
		{
			ClearErrorState();
			return Database.GetRowCount($"{TableName_SecLink} As {aliasSecurityLink}", filter);
		}
		public override long GetSecurityLinkCount(SaSecurityLink.Params prm)
		{
			ClearErrorState();
			return GetSecurityLinkCount(GetSecurityLinkQueryFilter(prm).Concat(" AND ", "(", ")"));
		}

		//-------------------------------------------------------------------
		// Security Link list.
		public override List<SaSecurityLink> GetSecurityLinkList(SaSecurityLink.Params prm)
		{
			ClearErrorState();
			List<SaSecurityLink> secLinks = new List<SaSecurityLink>();
			DbQuery qry = new DbQuery(Database.DbmsType);
			qry.Tables.Add(TableName_SecLink, aliasSecurityLink);
			SaSecLink_Db dbSecurityLink = new SaSecLink_Db(DbInfo);
			qry.Columns.AddRange(dbSecurityLink.ExistingColumnNames);
			qry.Filters.AddRange(GetSecurityLinkQueryFilter(prm));
			qry.OrderBy.AddRange(GetSecurityLinkSortColumns(prm));
			// Query data.
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					dbCommand.CommandText = qry.BuildQuery(prm.ResultsPaging);
					using (DbDataReader dbDataReader = dbCommand.ExecuteReader())
					{
						while (dbDataReader.Read())
						{
							dbSecurityLink = new SaSecLink_Db(DbInfo);
							dbSecurityLink.PopulateFrom(dbDataReader);
							SaSecurityLink secLink = CreateSecurityLink(dbSecurityLink);
							PopulateFrom(dbSecurityLink, secLink);
							secLinks.Add(secLink);
						}
					}
				}
				catch (Exception exc)
				{
					SetErrorState(ErrorMessage.DatabaseQueryException);
					SaLogger.Warn($"{SysUtil.Fn}\n\tQuery: {dbCommand.CommandText}\n\t{ExceptionUtil.GetErrorStateMessage(exc)}");
				}
			}
			return secLinks;
		}

		//-------------------------------------------------------------------
		// Security Link query.
		public override DbResultSet ExecuteSecurityLinkQuery(List<ColumnDfn> columns, SaSecurityLink.Params prm)
		{
			ClearErrorState();

			//---------------------------------------------------------------------
			// Construct query.
			DbQuery query = new DbQuery(Database.DbmsType);
			query.Tables.Add(TableName_SecLink, aliasSecurityLink);
			if (columns.HasId(SaSecurityLink.Column.ItemIdOwner))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemOwner, aliasSecurityLink));
			if (columns.HasId(SaSecurityLink.Column.ItemIdTarget))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemTarget, aliasSecurityLink));
			if (columns.HasId(SaSecurityLink.Column.ItemIdContext) || columns.HasId(SaSecurityLink.Column.ItemContext_Desc))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemContext, aliasSecurityLink));
			if (columns.HasId(SaSecurityLink.Column.DaysApplicable))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_DayApplic, aliasSecurityLink));
			if (columns.HasId(SaSecurityLink.Column.DateApplicableFrom))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_DateApplicFrom, aliasSecurityLink));
			if (columns.HasId(SaSecurityLink.Column.DateApplicableTo))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_DateApplicTo, aliasSecurityLink));
			if (columns.HasId(SaSecurityLink.Column.Status) || columns.HasId(SaSecurityLink.Column.Status_Desc) || columns.HasId(SaSecurityLink.Column.Status_Ind) || columns.HasId(SaSecurityLink.Column.Granted_Y) || columns.HasId(SaSecurityLink.Column.Denied_X))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_Status, aliasSecurityLink));
			if (columns.HasId(SaSecurityLink.Column.CreateOn_Date))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_CreateOn, aliasSecurityLink));
			if (columns.HasId(SaSecurityLink.Column.UpdateOn_Date))
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_UpdateOn, aliasSecurityLink));

			//---------------------------------------------------------------------
			// Owner item.
			if (columns.HasId(SaSecurityLink.Column.ItemOwner_Code) || columns.HasId(SaSecurityLink.Column.ItemOwner_Desc))
			{
				String aliasItemOwner = "aItmOwn";
				DbQueryJoin joinItmOwn = new DbQueryJoin(DbJoinType.LeftOuter);
				joinItmOwn.Table = new StringPair(TableName_SecItem, aliasItemOwner);
				joinItmOwn.Filters.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecItem_Id, aliasItemOwner) + "=" + SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemOwner, aliasSecurityLink));
				query.Joins.Add(joinItmOwn);
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecItem_Code, aliasItemOwner), colPrefixSecLnk_ItemOwner + SaSecurityDbDfn.GetColumnName(SaSecurityDbDfn.ColumnIdx.SaSecItem_Code));
			}

			//---------------------------------------------------------------------
			// Target item.
			if (columns.HasId(SaSecurityLink.Column.ItemTarget_Code) || columns.HasId(SaSecurityLink.Column.ItemTarget_Desc))
			{
				String aliasItemTarget = "aItmTgt";
				DbQueryJoin joinItmTgt = new DbQueryJoin(DbJoinType.LeftOuter);
				joinItmTgt.Table = new StringPair(TableName_SecItem, aliasItemTarget);
				joinItmTgt.Filters.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecItem_Id, aliasItemTarget) + "=" + SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecLink_ItemTarget, aliasSecurityLink));
				query.Joins.Add(joinItmTgt);
				query.Columns.Add(SaSecurityDbDfn.GetColumnNameQual(SaSecurityDbDfn.ColumnIdx.SaSecItem_Code, aliasItemTarget), colPrefixSecLnk_ItemTarget + SaSecurityDbDfn.GetColumnName(SaSecurityDbDfn.ColumnIdx.SaSecItem_Code));
			}

			//---------------------------------------------------------------------
			// Populate filter.
			query.Filters.AddRange(GetSecurityLinkQueryFilter(prm));

			// Configure sort sequence.
			foreach (String sortColumn in GetSecurityLinkSortColumns(prm))
				query.OrderBy.Add(sortColumn);

			//return new DbResultSet_DataTableReader(Database, query.BuildQuery(prm.ResultsPaging));
			return DbResultSet_DataReader.ExecuteQuery(Database, query.BuildQuery(prm.ResultsPaging));
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}