abnacn-validator/dist/abnacn-validator.js

Validates Australian Business Numbers (ABNs) or Australian Company Numbers (ACNs) or a combination of both.

(function (global, factory) {
    if (typeof define === "function" && define.amd) {
        define(['exports'], factory);
    } else if (typeof exports !== "undefined") {
        factory(exports);
    } else {
        var mod = {
            exports: {}
        };
        factory(mod.exports);
        global.abnacn = mod.exports;
    }
})(this, function (exports) {
    'use strict';

    Object.defineProperty(exports, "__esModule", {
        value: true
    });
    exports.isValidABN = isValidABN;
    exports.isValidACN = isValidACN;
    exports.isValidABNorACN = isValidABNorACN;
    // Taken from Truffala's formula at:
    // http://stackoverflow.com/questions/14174738/regex-to-match-australian-business-number-abn
    function isValidABN(str) {
        str = str.replace(/[ _]/g, '');

        if (!str || str.length !== 11) {
            return false;
        }
        var weights = [10, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19],
            checksum = str.split('').map(Number).reduce(function (total, digit, index) {
            if (!index) {
                digit--;
            }
            return total + digit * weights[index];
        }, 0);

        if (!checksum || checksum % 89 !== 0) {
            return false;
        }

        return true;
    }

    // Taken from Worldspawn's post on http://forums.whirlpool.net.au/archive/984775
    function isValidACN(acn) {
        // Strip off white space
        if (typeof acn === 'string') {
            acn = acn.replace(/\s/g, '').replace(/-/g, '');
        }

        if (acn.length != 9 || isNaN(parseInt(acn))) return false;

        var weighting = [8, 7, 6, 5, 4, 3, 2, 1];
        var tally = 0;
        for (var i = 0; i < weighting.length; i++) {
            tally += parseInt(acn.charAt(i)) * weighting[i];
        }

        var check = 10 - tally % 10;
        check = check == 10 ? 0 : check;

        return check == acn[8];
    }

    function isValidABNorACN(value) {
        // Logical OR operation returns true if only of them is true, and false only if they're both false.
        return isValidABN(value) || isValidACN(value);
    }
});