@fleetbase/ember-accounting/addon/utils/unformat.js

Updated port of the great accounting.js library to ES6 modules that integrates seamlessly with ember-cli

import { isArray } from '@ember/array';
import { number } from '../settings';

/**
 * Takes a string/array of strings, removes all formatting/cruft and returns the raw float value
 * Alias: `accounting.parse(string)`
 *
 * Decimal must be included in the regular expression to match floats (defaults to
 * accounting.settings.number.decimal), so if the number uses a non-standard decimal
 * separator, provide it as the second argument.
 *
 * Also matches bracketed negatives (eg. "$ (1.99)" => -1.99)
 *
 * Doesn't throw any errors (`NaN`s become 0) but this may change in future
 *
 * ```js
 *  accounting.unformat("£ 12,345,678.90 GBP"); // 12345678.9
 * ```
 *
 * @method unformat
 * @for accounting
 * @param {String|Array<String>} value The string or array of strings containing the number/s to parse.
 * @param {Number}               decimal Number of decimal digits of the resultant number
 * @return {Float} The parsed number
 */
export default function unformat(value, decimal) {
    // Recursively unformat arrays:
    if (isArray(value)) {
        return value.map(function (val) {
            return unformat(val, decimal);
        });
    }

    // Fails silently (need decent errors):
    value = value || 0;

    // Return the value as-is if it's already a number:
    if (typeof value === 'number') {
        return value;
    }

    // Default decimal point comes from settings, but could be set to eg. "," in opts:
    decimal = decimal || number.decimal;

    // Build regex to strip out everything except digits, decimal point and minus sign:
    var regex = new RegExp('[^0-9-' + decimal + ']', ['g']);
    var unformatted = parseFloat(
        ('' + value)
            .replace(/\((.*)\)/, '-$1') // replace bracketed values with negatives
            .replace(regex, '') // strip out any cruft
            .replace(decimal, '.') // make sure decimal point is standard
    );

    // This will fail silently which may cause trouble, let's wait and see:
    return !isNaN(unformatted) ? unformatted : 0;
}