<?php
class tuniuprice_model extends CI_Model {

    function __construct() {
        parent::__construct();
        $this->HT = $this->load->database('HT', TRUE);
    }
	
	//新增或更新价格
	public function addOrUpdate($tnp_train_no,$tpc_from_station_code,$tpc_to_station_code,$tnp_price){
		$sql = "IF NOT EXISTS(
                        SELECT 1
                        FROM   TuNiuPrice
                        WHERE  tnp_train_no = '$tnp_train_no'
                               AND tnp_from_station_code = '$tpc_from_station_code'
                               AND tnp_to_station_code = '$tpc_to_station_code'
                   )  BEGIN
                                INSERT INTO TuNiuPrice
                                  (
                                   tnp_train_no
                                   ,tnp_from_station_code
                                   ,tnp_to_station_code
                                   ,tnp_price
                                   ,tnp_datetime
                                  )
                                VALUES
                                  (
                                    '$tnp_train_no','$tpc_from_station_code','$tpc_to_station_code','$tnp_price',GETDATE()
                                  )   
								END  
				ELSE
					BEGIN
						UPDATE TuNiuPrice
						SET    tnp_price               = '$tnp_price'
							  ,tnp_datetime          = GETDATE()
						WHERE  tnp_train_no            = '$tnp_train_no'
							 AND  tnp_from_station_code     = '$tpc_from_station_code'
							AND   tnp_to_station_code       = '$tpc_to_station_code'
					END				
								";
		$query = $this->HT->query($sql);
        return $query;				
	}
	
	//获取价格
	public function get_price($fromStationCode,$toStationCode,$trainCode){
		$sql = "SELECT 
					tnp_price 
				FROM 
					TuNiuPrice 
				WHERE 
					tnp_train_no = '$trainCode'
				AND 
					tnp_from_station_code = '$fromStationCode'
				AND	
					tnp_to_station_code = '$toStationCode'";
		$query = $this->HT->query($sql);		
		return $query->row();
	}
	
}


?>