<?php
class tuniuprice_model extends CI_Model {

    function __construct() {
        parent::__construct();
        $this->INFO = $this->load->database('INFO', TRUE);
    }
	
	//新增或更新价格
	public function addOrUpdate($TPL_Train_No,$TPL_Train_Code,$TPL_From_Station_Code,$TPL_To_Station_Code,$TPL_Price){
		$sql = "IF NOT EXISTS(
                        SELECT 1
                        FROM   TrainPriceList
                        WHERE  TPL_Train_Code = '$TPL_Train_Code'
                               AND TPL_From_Station_Code = '$TPL_From_Station_Code'
                               AND TPL_To_Station_Code = '$TPL_To_Station_Code'
                   )  BEGIN
                                INSERT INTO TrainPriceList
                                  (
                                   TPL_Train_No,
								   TPL_Train_Code,
                                   TPL_From_Station_Code,
                                   TPL_To_Station_Code,
                                   TPL_Price,
                                   TPL_Datetime,
								   TPL_Source
                                  )
                                VALUES
                                  (
                                    '$TPL_Train_No','$TPL_Train_Code','$TPL_From_Station_Code','$TPL_To_Station_Code','$TPL_Price',GETDATE(),'tuniu'
                                  )   
								END  
				ELSE
					BEGIN
						UPDATE TrainPriceList
						SET    
							   TPL_Train_No			   = '$TPL_Train_No',
							   TPL_Price               = '$TPL_Price',
							   TPL_Datetime            = GETDATE(),
							   TPL_Source			   = 'tuniu'
						WHERE  TPL_Train_Code            = '$TPL_Train_Code'
							 AND  TPL_From_Station_Code     = '$TPL_From_Station_Code'
							AND   TPL_To_Station_Code       = '$TPL_To_Station_Code'
					END				
								";
		$query = $this->INFO->query($sql);
        return $query;				
	}
	
	//获取价格
	public function get_price($fromStationCode,$toStationCode,$trainCode){
		$sql = "SELECT 
					TPL_Price 
				FROM 
					TrainPriceList 
				WHERE 
					TPL_Train_Code = '$trainCode'
				AND 
					TPL_From_Station_Code = '$fromStationCode'
				AND	
					TPL_To_Station_Code = '$toStationCode'";
		$query = $this->INFO->query($sql);		
		return $query->row();
	}
}
?>