zh_food/app/Servers/printer/NoteFormatterServer.php

<?php


namespace App\Servers\printer;


/**
 * 打印机格式化服务
 */
class NoteFormatterServer
{
    /**
     * 58mm 系列打印机模板
     */
    public const ROW_MAX_CHAR_LEN = 32;//行最大字符长度
    private const MAX_NAME_CHAR_LEN = 20;//最大名称字符长度
    private const LAST_ROW_MAX_NAME_CHAR_LEN = 16;//最后一行最大名称字符长度
    private const MAX_QUANTITY_CHAR_LEN = 6;//数量最大长度
    private const MAX_PRICE_CHAR_LEN = 6;//价格最大长度
    /**
     * 错误信息
     * @var string
     */
    private $errorMsg = '';

    static private $server = '';


    private function __construct()
    {
    }



    /**
     * 创建对象
     * @return NoteFormatterServer
     */
    static function creatServer()
    {
        if (empty(self::$server)) {
            self::$server = new NoteFormatterServer();
        }
        return self::$server;
    }


    /**
     * 格式化菜品列表（用于58mm打印机）
     * 注意：默认字体排版，若是字体宽度倍大后不适用
     * 58mm打印机一行可打印32个字符 汉子按照2个字符算
     * 分3列： 名称20字符一般用16字符4空格填充  数量6字符  单价6字符，不足用英文空格填充 名称过长换行
     *
     */

    public static function formatPrintOrderItem($foodName, $quantity, $price,$is_yly=0)
    {
        $orderNameEmpty = str_repeat(" ", self::MAX_NAME_CHAR_LEN);
        $foodNameLen = self::CalcGbkLenForPrint($foodName);
//         print("foodNameLen=".$foodNameLen."\n");

        $quantityStr = '*' . $quantity;
        $quantityLen = self::CalcAsciiLenForPrint($quantityStr);
        // print("quantityLen=".$quantityLen."\n");

        $priceStr = '' . round($price, 2);
        $priceLen = self::CalcAsciiLenForPrint($priceStr);
        // print("priceLen=".$priceLen);

        $result = $foodName;
        $mod = $foodNameLen % self::ROW_MAX_CHAR_LEN;
        // print("mod=".$mod."\n");

        if ($mod <= self::LAST_ROW_MAX_NAME_CHAR_LEN) {
            // 保证各个列的宽度固定，不足部分，利用空格填充
            //make sure all the column length fixed, fill with space if not enough
            $result = $result . str_repeat(" ", self::MAX_NAME_CHAR_LEN - $mod);

        } else {
            // 另起新行
            // new line
            if ($is_yly){
                $result = $result . "\n";
            }else{
                $result = $result . "<BR>";
            }
            $result = $result . $orderNameEmpty;
        }

        $result = $result . $quantityStr . str_repeat(" ", self::MAX_QUANTITY_CHAR_LEN - $quantityLen);
        $result = $result . $priceStr . str_repeat(" ", self::MAX_PRICE_CHAR_LEN - $priceLen);

//        $result = '<L><HB>'.$result . "</L></HB><BR>";

        return $result;
    }

    /**
     * 大趋智能格式化菜品列表（用于58mm打印机）
     * @param $foodName
     * @param $quantity
     * @param $price
     * @return string
     */
    public static function trenditFormatOrderItem($foodName, $quantity, $price)
    {
        $orderNameEmpty = str_repeat(" ", self::MAX_NAME_CHAR_LEN);
        $foodNameLen = self::CalcGbkLenForPrint($foodName);
//         print("foodNameLen=".$foodNameLen."\n");

        $quantityStr = '*' . $quantity;
        $quantityLen = self::CalcAsciiLenForPrint($quantityStr);
        // print("quantityLen=".$quantityLen."\n");

        $priceStr = '' . round($price, 2);
        $priceLen = self::CalcAsciiLenForPrint($priceStr);
        // print("priceLen=".$priceLen);

        $result = $foodName;
        $mod = $foodNameLen % self::ROW_MAX_CHAR_LEN;
        // print("mod=".$mod."\n");

        if ($mod <= self::LAST_ROW_MAX_NAME_CHAR_LEN) {
            // 保证各个列的宽度固定，不足部分，利用空格填充
            //make sure all the column length fixed, fill with space if not enough
            $result = $result . str_repeat(" ", self::MAX_NAME_CHAR_LEN - $mod);

        } else {
            // 另起新行
            // new line
//            $result = $result . '<BR>';
            $result = $result . $orderNameEmpty;
        }

        $result = $result . $quantityStr . str_repeat(" ", self::MAX_QUANTITY_CHAR_LEN - $quantityLen);
        $result = $result . $priceStr . str_repeat(" ", self::MAX_PRICE_CHAR_LEN - $priceLen);

        $result = '<LEFT><font# height=2>'.$result . '</font#></LEFT><BR>';

        return $result;
    }


    public static function CalcGbkLenForPrint($data)
    {
        return (strlen($data) + mb_strlen($data, "UTF8")) / 2;
    }

    public static function CalcAsciiLenForPrint($data)
    {
        return strlen($data);
    }

    /**
     * @return string
     */
    public function getErrorMsg(): string
    {
        return $this->errorMsg;
    }

}