@synotech/utils/src/math.currency.ts

a collection of utilities for internal use

import BigNumber from 'bignumber.js';

class MathCurrency {
	constructor() {
		BigNumber.config({
			DECIMAL_PLACES: 2,
			ROUNDING_MODE: BigNumber.ROUND_HALF_UP,
		});
	}

	add(...args: number[] | string[]): string {
		let result = new BigNumber(0);
		args.forEach((arg: number | string) => {
			result = result.plus(new BigNumber(arg));
		});
		return parseFloat(result.toString()).toFixed(2).toString();
	}

	subtract(...args: number[] | string[]): string {
		if (args.length < 2) {
			throw new Error('Subtraction requires at least two arguments');
		}
		let result = new BigNumber(args[0]);
		for (let i = 1; i < args.length; i++) {
			result = result.minus(new BigNumber(args[i]));
		}
		return parseFloat(result.toString()).toFixed(2).toString();
	}

	multiply(...args: number[] | string[]): string {
		let result = new BigNumber(1);
		args.forEach((arg: number | string) => {
			result = result.times(new BigNumber(arg));
		});
		return parseFloat(result.toString()).toFixed(2).toString();
	}

	divide(...args: number[] | string[]): string {
		if (args.length < 2) {
			throw new Error('Division requires at least two arguments');
		}
		let result = new BigNumber(args[0]);
		for (let i = 1; i < args.length; i++) {
			if (args[i] === 0) {
				throw new Error('Division by zero');
			}
			result = result.dividedBy(new BigNumber(args[i]));
		}
		return parseFloat(result.toString()).toFixed(2).toString();
	}
}

const mathCurrency = new MathCurrency();
export { MathCurrency, mathCurrency };