js 中文数字转阿拉伯数字

var map = {
    零: 0,

    一: 1,
    壹: 1,

    二: 2,
    贰: 2,
    两: 2,

    三: 3,
    叁: 3,

    四: 4,
    肆: 4,

    五: 5,
    伍: 5,

    六: 6,
    陆: 6,

    七: 7,
    柒: 7,

    八: 8,
    捌: 8,

    九: 9,
    玖: 9,

    十: 10,
    拾: 10,

    百: 100,
    佰: 100,

    千: 1000,
    仟: 1000,

    万: 10000,
    十万: 100000,
    百万: 1000000,
    千万: 10000000,
    亿: 100000000,
}

// 解析失败返回-1，成功返回转换后的数字，不支持负数
function numberDigit(chinese_number) {
    var len = chinese_number.length
    if (len == 0) return -1
    if (len == 1) return map[chinese_number] <= 10 ? map[chinese_number] : -1
    var summary = 0
    if (map[chinese_number[0]] == 10) {
        chinese_number = '一' + chinese_number
        len++
    }
    if (len >= 3 && map[chinese_number[len - 1]] < 10) {
        var last_second_num = map[chinese_number[len - 2]]
        if (
            last_second_num == 100 ||
            last_second_num == 1000 ||
            last_second_num == 10000 ||
            last_second_num == 100000000
        ) {
            for (var key in map) {
                if (map[key] == last_second_num / 10) {
                    chinese_number += key
                    len += key.length
                    break
                }
            }
        }
    }
    if (chinese_number.match(/亿/g) && chinese_number.match(/亿/g).length > 1) return -1
    var splited = chinese_number.split('亿')
    if (splited.length == 2) {
        var rest = splited[1] == '' ? 0 : numberDigit(splited[1])
        return summary + numberDigit(splited[0]) * 100000000 + rest
    }
    splited = chinese_number.split('万')
    if (splited.length == 2) {
        var rest = splited[1] == '' ? 0 : numberDigit(splited[1])
        return summary + numberDigit(splited[0]) * 10000 + rest
    }
    var i = 0
    while (i < len) {
        var first_char_num = map[chinese_number[i]]
        var second_char_num = map[chinese_number[i + 1]]
        if (second_char_num > 9) summary += first_char_num * second_char_num
        i++
        if (i == len) summary += first_char_num <= 9 ? first_char_num : 0
    }
    return summary
}

module.exports = numberDigit