cashify-es2017/dist/utils/parser.js

Lightweight currency conversion library, successor of money.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
* Expression parser
*
* @param {string} expression - Expression you want to parse, ex. `10 usd to pln` or `€1.23 eur`
* @return {Object} Object with parsing results
*
* @example
* parse('10 EUR to GBP'); //=> {amount: 10, from: 'EUR', to: 'GBP'}
*/
function parse(expression) {
    const amount = Number(expression.replace(/[^\d-.]/g, ''));
    let from;
    let to;
    // Search for separating keyword (case insensitive) to split the expression into 2 parts
    if (/to|in|as/i.test(expression)) {
        const firstPart = expression.slice(0, expression.search(/to|in|as/i)).toUpperCase().trim();
        from = firstPart.replace(/[^A-Za-z]/g, '');
        to = expression.slice(expression.search(/to|in|as/i) + 2).toUpperCase().trim();
    }
    else {
        from = expression.replace(/[^A-Za-z]/g, '');
    }
    if (Number.isNaN(amount) || expression.trim().length === 0) {
        throw new Error('Could not parse the expression. Make sure it includes at least a valid amount.');
    }
    return {
        amount,
        from: from.toUpperCase() || undefined,
        to,
    };
}
exports.default = parse;