<?php

class CAllPerfomanceTable
{
	public $TABLE_NAME = "";

	function GetList($arSelect, $arFilter, $arOrder = array(), $arNavParams = false)
	{
		global $DB;

		$arFields = $this->GetTableFields();

		if (!is_array($arSelect))
			$arSelect = array();
		if (count($arSelect) < 1)
			$arSelect = array_keys($arFields);

		if (!is_array($arOrder))
			$arOrder = array();

		$arQueryOrder = array();
		foreach ($arOrder as $strColumn => $strDirection)
		{
			$strDirection = strtoupper($strDirection) == "ASC"? "ASC": "DESC";
			if (array_key_exists($strColumn, $arFields))
			{
				$arSelect[] = $strColumn;
				if ($arFields[$strColumn] == "datetime" || $arFields[$strColumn] == "date")
					$arQueryOrder[$strColumn] = $this->escapeColumn("TMP_".$strColumn)." ".$strDirection;
				else
					$arQueryOrder[$strColumn] = $this->escapeColumn($strColumn)." ".$strDirection;
			}
		}

		$arQuerySelect = array();
		foreach ($arSelect as $strColumn)
		{
			if (array_key_exists($strColumn, $arFields))
			{
				if ($arFields[$strColumn] == "datetime" || $arFields[$strColumn] == "date")
				{
					$arQuerySelect["TMP_".$strColumn] = "t.".$this->escapeColumn($strColumn)." TMP_".$strColumn;
					$arQuerySelect[$strColumn] = $DB->DateToCharFunction("t.".$this->escapeColumn($strColumn), "SHORT")." ".$this->escapeColumn($strColumn);
					$arQuerySelect["FULL_".$strColumn] = $DB->DateToCharFunction("t.".$this->escapeColumn($strColumn), "FULL")." FULL_".$strColumn;
					$arQuerySelect["SHORT_".$strColumn] = $DB->DateToCharFunction("t.".$this->escapeColumn($strColumn), "SHORT")." SHORT_".$strColumn;
				}
				else
				{
					$arQuerySelect[$strColumn] = "t.".$this->escapeColumn($strColumn);
				}
			}
		}

		foreach ($arFields as $FIELD_NAME => $FIELD_TYPE)
		{
			$arFields[$FIELD_NAME] = array(
				"TABLE_ALIAS" => "t",
				"FIELD_NAME" => "t.".$this->escapeColumn($FIELD_NAME),
				"FIELD_TYPE" => $FIELD_TYPE,
				"JOIN" => false,
				//"LEFT_JOIN" => "lt",
			);
		}
		$obQueryWhere = new CSQLWhere;
		$obQueryWhere->SetFields($arFields);

		if (count($arQuerySelect) < 1)
			$arQuerySelect = array("*" => "t.*");

		if (is_array($arNavParams))
		{
			return $this->NavQuery($arNavParams, $arQuerySelect, $this->TABLE_NAME, $obQueryWhere->GetQuery($arFilter), $arQueryOrder);
		}
		else
		{
			$strSql = "
				SELECT
				".implode(", ", $arQuerySelect)."
				FROM
					".$this->escapeTable($this->TABLE_NAME)." t
			";
			if ($strQueryWhere = $obQueryWhere->GetQuery($arFilter))
			{
				$strSql .= "
					WHERE
					".$strQueryWhere."
				";
			}
			if (count($arQueryOrder) > 0)
			{
				$strSql .= "
					ORDER BY
					".implode(", ", $arQueryOrder)."
				";
			}

			return $DB->Query($strSql, false, "File: ".__FILE__."<br>Line: ".__LINE__);
		}
	}

	function NavQuery($arNavParams, $arQuerySelect, $strTableName, $strQueryWhere, $arQueryOrder)
	{
		global $DB;
		if (intval($arNavParams["nTopCount"]) <= 0)
		{
			$strSql = "
				SELECT
					count(1) C
				FROM
					".$this->escapeTable($strTableName)." t
			";
			if ($strQueryWhere)
			{
				$strSql .= "
					WHERE
					".$strQueryWhere."
				";
			}
			$res_cnt = $DB->Query($strSql);
			$res_cnt = $res_cnt->Fetch();
			$cnt = $res_cnt["C"];

			$strSql = "
				SELECT
				".implode(", ", $arQuerySelect)."
				FROM
					".$this->escapeTable($strTableName)." t
			";
			if ($strQueryWhere)
			{
				$strSql .= "
					WHERE
					".$strQueryWhere."
				";
			}
			if (count($arQueryOrder) > 0)
			{
				$strSql .= "
					ORDER BY
					".implode(", ", $arQueryOrder)."
				";
			}

			$res = new CDBResult();
			$res->NavQuery($strSql, $cnt, $arNavParams);

			return $res;
		}
		else
		{
			$strSql = "
				SELECT
				".implode(", ", $arQuerySelect)."
				FROM
					".$this->escapeTable($strTableName)." t
			";
			if ($strQueryWhere)
			{
				$strSql .= "
					WHERE
					".$strQueryWhere."
				";
			}
			if (count($arQueryOrder) > 0)
			{
				$strSql .= "
					ORDER BY
					".implode(", ", $arQueryOrder)."
				";
			}

			return $DB->Query($DB->TopSql($strSql, intval($arNavParams["nTopCount"])));
		}
	}

	public static function escapeColumn($column)
	{
		return $column;
	}

	public static function escapeTable($tableName)
	{
		return $tableName;
	}

	function GetTableFields($TABLE_NAME = false, $bExtended = false)
	{
		if ($TABLE_NAME && $bExtended)
			return array();
		else
			return array();
	}

	function getCreateIndexDDL($TABLE_NAME, $INDEX_NAME, $INDEX_COLUMNS)
	{
		return "CREATE INDEX ".$INDEX_NAME." ON ".$TABLE_NAME." (".implode(", ", $INDEX_COLUMNS).")";
	}
}