<?php
class Service_Currency
{
    /**
     * @var null
     */
    public static $_modelClass = null;

    /**
     * @return Table_Currency|null
     */
    public static function getModelInstance()
    {
        if (is_null(self::$_modelClass)) {
            self::$_modelClass = new Table_Currency();
        }
        return self::$_modelClass;
    }

    /**
     * @param $row
     * @return mixed
     */
    public static function add($row)
    {
        $model = self::getModelInstance();
        return $model->add($row);
    }


    /**
     * @param $row
     * @param $value
     * @param string $field
     * @return mixed
     */
    public static function update($row, $value, $field = "currency_id")
    {
        $model = self::getModelInstance();
        return $model->update($row, $value, $field);
    }

    /**
     * @param $value
     * @param string $field
     * @return mixed
     */
    public static function delete($value, $field = "currency_id")
    {
        $model = self::getModelInstance();
        return $model->delete($value, $field);
    }

    /**
     * @param $value
     * @param string $field
     * @param string $colums
     * @return mixed
     */
    public static function getByField($value, $field = 'currency_id', $colums = "*")
    {
        $model = self::getModelInstance();
        return $model->getByField($value, $field, $colums);
    }

    /**
     * @return mixed
     */
    public static function getAll()
    {
        $model = self::getModelInstance();
        return $model->getAll();
    }
    
    public static function getKeyVal() {
    	$aKeyVal = array();
    	$list = self::getAll();
    	foreach($list as $row)
    		$aKeyVal[$row['currency_code']] = $row['currency_hs_code'];
    	return $aKeyVal;
    }

    /**
     * @param array $condition
     * @param string $type
     * @param int $pageSize
     * @param int $page
     * @param string $order
     * @return mixed
     */
    public static function getByCondition($condition = array(), $type = '*', $pageSize = 0, $page = 1, $order = "")
    {
        $model = self::getModelInstance();
        return $model->getByCondition($condition, $type, $pageSize, $page, $order);
    }

    /**
     * @param $val
     * @return array
     */
    public static function validator($val)
    {
        $validateArr = $error = array();
        
        $validateArr[] = array("name" =>EC::Lang('currencyName'), "value" =>$val["currency_name_en"], "regex" => array("require",));
        $validateArr[] = array("name" =>EC::Lang('currencyNameEn'), "value" =>$val["currency_name"], "regex" => array("require",));
        $validateArr[] = array("name" =>EC::Lang('currencyCode'), "value" =>$val["currency_code"], "regex" => array("require",));
        $validateArr[] = array("name" =>EC::Lang('currencyDecimalPlaces'), "value" =>$val["currency_decimal_places"], "regex" => array("positive"));
        $validateArr[] = array("name" =>EC::Lang('currencyRate'), "value" =>$val["currency_rate"], "regex" => array("require","integer",));
        return  Common_Validator::formValidator($validateArr);
    }


    /**
     * @param array $params
     * @return array
     */
    public  function getFields()
    {
        $row = array(
        
              'E0'=>'currency_id',
              'E1'=>'currency_name_en',
              'E2'=>'currency_name',
              'E3'=>'currency_code',
              'E4'=>'currency_symbol_left',
              'E5'=>'currency_symbol_right',
              'E6'=>'currency_decimal_point',
              'E7'=>'currency_thousands_point',
              'E8'=>'currency_decimal_places',
              'E9'=>'currency_rate',
              'E10'=>'currency_update_time',
        );
        return $row;
    }

    /**
     * 获取自定义SQL语句查询结果
     *
     * @access	public
     * @param   string	($field		待返回的字段，默认为所有)
     * @param   string	($condition	查询条件)
     * @param	mixed	($value		待转换查询字段值)
     * @return	mixed
     */
    public static function getCustomQuery($field = '*', $condition = '', $value = '')
    {
    	$model = self::getModelInstance();
    	return $model->getCustomQuery($field, $condition, $value);
    }
    /**
     * @author william-fan
     * @todo 两种币种转化
     */
    public static function converByCode($code_start,$code_end,$value){
    	if($code_start == '' || $code_end == '' || $value == ''){
    		return 0;
    	}
    	if($code_start == $code_end){
    		return $value;
    	}
    	$row_start = self::getByField($code_start,'currency_code');
    	$row_end = self::getByField($code_end,'currency_code');
    	if(empty($row_start) || empty($row_end)){
    		return 0;
    	}
    	$transValue = ($value*$row_start['currency_rate'])/$row_end['currency_rate'];
    	return sprintf('%.2f',$transValue);
    }
}