MuCTS\Money\Chinese\Convert

Complexity

Total Complexity

26

Size/Duplication

Total Lines	133
Duplicated Lines	0 %

Importance

Changes	2
Bugs	0	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
C	toCn()	0	35	15
B	toDigit()	0	35	11

<?php
/**
 * This file is part of the mucts.com.
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 *
 * @version 1.0
 * @author herry<yuandeng@aliyun.com>
 * @copyright © 2020 MuCTS.com All Rights Reserved.
 */

namespace MuCTS\Money\Chinese;

use Illuminate\Support\Arr;
use MuCTS\Money\Exceptions\InvalidArgumentException;

final class Convert
{
    private const DIGITAL = [
        0 => '零',
        1 => '壹',
        2 => '贰',
        3 => '叁',
        4 => '肆',
        5 => '伍',
        6 => '陆',
        7 => '柒',
        8 => '捌',
        9 => '玖',
    ];

    private const UNIT = [
        -4 => '毫',
        -3 => '厘',
        -2 => '分',
        -1 => '角',
        0 => '元',
        1 => '拾',
        2 => '佰',
        3 => '仟',
        4 => '万',
        8 => '亿',
        12 => '兆',
        16 => '京',
        20 => '垓',
        24 => '杼',
        28 => '穰',
        32 => '沟',
        36 => '涧',
        40 => '正',
        44 => '载',
        48 => '极'
    ];

    private const SYMBOL = [
        '-' => '负',
        '+' => '',
        '' => '整'
    ];


    /**
     * 金额转换成中文
     *
     * @param string|int|float $amount
     * @param string $prefix
     * @param string $cnPrefix
     * @return string
     */
    public static function toCn($amount, $prefix = '￥', string $cnPrefix = '人民币'): string
    {
        if (!preg_match(sprintf('/^(%s)?[+\-]?([1-9]\d{0,2}([,]?\d{3})*|0)(\.\d{0,4})?$/', $prefix), $amount)) {
            throw new InvalidArgumentException(sprintf('%s is not a valid chinese number text', $amount));
        }
        $amount = strtr($amount, [',' => '', $prefix => '']);
        list($integer, $decimals) = explode('.', strval($amount) . '.', 2);
        if (($len = strlen($integer)) > 48) {
            throw new InvalidArgumentException(sprintf('%s is not a valid chinese number text', $amount));
        }
        $integerStr = '';
        $i = $len;
        $unit = 0;
        while ($i) {
            $num = $integer[$len - $i--];
            if (in_array($num, array_keys(self::SYMBOL), true)) {
                $integerStr .= self::SYMBOL[$num];
                continue;
            }
            if ($num > 0 || Arr::exists(self::UNIT, $i) && $unit <= $i) {
                $integerStr .= $num > 0 || $i == 0 ? self::DIGITAL[$num] : '';
                $unit = Arr::exists(self::UNIT, $i) ? $i : $i % 4;
                $integerStr .= self::UNIT[$unit];
            }
        }
        $decimalStr = '';
        $len = strlen($decimals);
        for ($i = 0; $i < $len; $i++) {
            $num = $decimals[$i];
            if ($num > 0) {
                $decimalStr .= self::DIGITAL[$num] . self::UNIT[-1 - $i];
            }
        }
        $integerStr = strpos($integerStr, self::UNIT[0]) ? $integerStr : $integerStr . self::UNIT[0];
        return $cnPrefix . $integerStr . ($decimalStr != '' ? $decimalStr : self::SYMBOL['']);
    }

    /**
     * 中文金额转阿拉伯数字金额
     *
     * @param string $cnAmount
     * @param string $prefix
     * @param string $cnPrefix
     * @return string
     */
    public static function toDigit(string $cnAmount, string $prefix = '￥', string $cnPrefix = '人民币'): string
    {
        $amount = preg_replace("/^{$cnPrefix}/", '', $cnAmount);
        $amount = preg_replace('/' . self::UNIT[0] . self::SYMBOL[''] . '$/', self::UNIT[0], $amount);
        $amounts = mb_str_split($amount);
        $amount = $maxUnit = 0;
        // 断定是否是正数，默认是
        $plus = 1;
        $decimal = 0;
        $un = null;
        while ($chr = array_pop($amounts)) {
            if (($key = array_search($chr, self::DIGITAL)) !== false) {
                if (is_null($un)) {
                    throw new InvalidArgumentException(sprintf('%s is not a valid chinese number text', $cnAmount));
                }
                if ($un >= 0) {
                    $amount = gmp_add($amount, gmp_mul($key, $un < 0 ? 10 ** $un : gmp_pow('10', $un)));
                } else {
                    $decimal += $key * (10 ** $un);
                }
                $un = null;
            } elseif (($key = array_search($chr, self::UNIT)) !== false) {
                if (!is_null($un) && $un != 0) {
                    throw new InvalidArgumentException(sprintf('%s is not a valid chinese number text', $cnAmount));
                }
                $un = $key;
                $maxUnit = max($maxUnit, $un);
                $un = $maxUnit > $un ? $maxUnit + $un : $un;
            } elseif ($chr == self::SYMBOL['-']) {
                $plus = -1;
            } else {
                throw new InvalidArgumentException(sprintf('%s is not a valid chinese number text', $cnAmount));
            }
        }
        return $prefix . gmp_strval(gmp_mul($amount, $plus)) . ltrim(strval($decimal), '0');
    }
}