@easymoney/money/dist/number/number.js

Best way to do money in js

import { bind } from "@easymoney/core";
const numbers = {
    "0": 1,
    "1": 1,
    "2": 1,
    "3": 1,
    "4": 1,
    "5": 1,
    "6": 1,
    "7": 1,
    "8": 1,
    "9": 1
};
export function createNumber(integerPart, fractionalPart = "") {
    if ("" === integerPart && "" === fractionalPart) {
        throw new TypeError("Empty number is invalid");
    }
    const innerInstance = {
        integerPart: parseIntegerPart(String(integerPart)),
        fractionalPart: parseFractionalPart(String(fractionalPart))
    };
    const instance = {};
    instance.isInteger = bind(isInt, innerInstance);
    instance.getIntegerPart = () => innerInstance.integerPart;
    instance.getFractionalPart = () => innerInstance.fractionalPart;
    instance.toString = bind(toString, innerInstance);
    return instance;
}
function parseIntegerPart(number) {
    if ("" === number || "0" === number) {
        return "0";
    }
    if ("-" === number) {
        return "-0";
    }
    let nonZero = false;
    let withPlus = false;
    for (let position = 0; position < number.length; position++) {
        const digit = number[position];
        if (!numbers[digit] &&
            !(0 === position && ("-" === digit || "+" === digit))) {
            throw new Error(`Invalid integer part ${number}. Invalid digit ${digit} found`);
        }
        if (0 === position && digit === "+") {
            withPlus = true;
        }
        if (false === nonZero && digit === "0") {
            throw new Error("Leading zeros are not allowed");
        }
        nonZero = true;
    }
    if (withPlus) {
        return number.substr(1);
    }
    return number;
}
function parseFractionalPart(number) {
    if ("" === number) {
        return number;
    }
    for (let position = 0; position < number.length; position++) {
        const digit = number[position];
        if (!numbers[digit]) {
            throw new Error(`Invalid fractional part ${number}. Invalid digit ${digit} found`);
        }
    }
    return number;
}
function isInt(innerInstance) {
    return innerInstance.fractionalPart === "";
}
export function fromString(number) {
    const decimalSeparatorPosition = number.indexOf(".");
    if (decimalSeparatorPosition === -1) {
        return createNumber(number, "");
    }
    const subString = number.substr(decimalSeparatorPosition + 1);
    return createNumber(number.substr(0, decimalSeparatorPosition), subString.replace(/0+$/, ""));
}
export function fromNumber(number) {
    if (typeof number === "number" &&
        !isNaN(parseInt(number)) &&
        isFinite(number) &&
        !Number.isInteger(number)) {
        return fromString(number.toFixed(14));
    }
    if (Number.isInteger(number)) {
        return createNumber(number);
    }
    if (typeof number === "string") {
        return fromString(number);
    }
    throw new TypeError("Valid numeric value expected");
}
function toString(innerInstance) {
    const { fractionalPart, integerPart } = innerInstance;
    if (fractionalPart === "") {
        return integerPart;
    }
    return `${integerPart}.${fractionalPart}`;
}
export function isEven(value) {
    return value % 2 === 0;
}
export function isHalf(number) {
    return Math.abs(number) % 1 === 0.5;
}
//# sourceMappingURL=number.js.map