(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
    typeof define === 'function' && define.amd ? define(factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, (global.FormValidation = global.FormValidation || {}, global.FormValidation.validators = global.FormValidation.validators || {}, global.FormValidation.validators.imo = factory()));
})(this, (function () { 'use strict';

    /**
     * FormValidation (https://formvalidation.io)
     * The best validation library for JavaScript
     * (c) 2013 - 2023 Nguyen Huu Phuoc <me@phuoc.ng>
     */
    function imo() {
        return {
            /**
             * Validate IMO (International Maritime Organization)
             * @see http://en.wikipedia.org/wiki/IMO_Number
             */
            validate: function (input) {
                if (input.value === '') {
                    return { valid: true };
                }
                if (!/^IMO \d{7}$/i.test(input.value)) {
                    return { valid: false };
                }
                // Grab just the digits
                var digits = input.value.replace(/^.*(\d{7})$/, '$1');
                var sum = 0;
                for (var i = 6; i >= 1; i--) {
                    sum += parseInt(digits.slice(6 - i, -i), 10) * (i + 1);
                }
                return { valid: sum % 10 === parseInt(digits.charAt(6), 10) };
            },
        };
    }

    return imo;

}));
