/*!
 * Copyright (c) 2015 Chris O'Hara <cohara87@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

(function (name, definition) {
    if (typeof exports !== 'undefined' && typeof module !== 'undefined') {
        module.exports = definition();
    } else if (typeof define === 'function' && typeof define.amd === 'object') {
        define(definition);
    } else {
        this[name] = definition();
    }
})('validator', function (validator) {

    'use strict';

    validator = { version: '4.2.1' };

    var emailUserPart = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~]+$/i;
    var quotedEmailUser = /^([\s\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e]|(\\[\x01-\x09\x0b\x0c\x0d-\x7f]))*$/i;

    var emailUserUtf8Part = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+$/i;
    var quotedEmailUserUtf8 = /^([\s\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|(\\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))*$/i;

    var displayName = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~\.\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~\.\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF\s]*<(.+)>$/i;

    var creditCard = /^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})$/;

    var isin = /^[A-Z]{2}[0-9A-Z]{9}[0-9]$/;

    var isbn10Maybe = /^(?:[0-9]{9}X|[0-9]{10})$/
      , isbn13Maybe = /^(?:[0-9]{13})$/;

    var ipv4Maybe = /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/
      , ipv6Block = /^[0-9A-F]{1,4}$/i;

    var uuid = {
        '3': /^[0-9A-F]{8}-[0-9A-F]{4}-3[0-9A-F]{3}-[0-9A-F]{4}-[0-9A-F]{12}$/i
      , '4': /^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
      , '5': /^[0-9A-F]{8}-[0-9A-F]{4}-5[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
      , all: /^[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}$/i
    };

    var alpha = /^[A-Z]+$/i
      , alphanumeric = /^[0-9A-Z]+$/i
      , numeric = /^[-+]?[0-9]+$/
      , int = /^(?:[-+]?(?:0|[1-9][0-9]*))$/
      , float = /^(?:[-+]?(?:[0-9]+))?(?:\.[0-9]*)?(?:[eE][\+\-]?(?:[0-9]+))?$/
      , hexadecimal = /^[0-9A-F]+$/i
      , decimal = /^[-+]?([0-9]+|\.[0-9]+|[0-9]+\.[0-9]+)$/
      , hexcolor = /^#?([0-9A-F]{3}|[0-9A-F]{6})$/i;

    var ascii = /^[\x00-\x7F]+$/
      , multibyte = /[^\x00-\x7F]/
      , fullWidth = /[^\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/
      , halfWidth = /[\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/;

    var surrogatePair = /[\uD800-\uDBFF][\uDC00-\uDFFF]/;

    var base64 = /^(?:[A-Z0-9+\/]{4})*(?:[A-Z0-9+\/]{2}==|[A-Z0-9+\/]{3}=|[A-Z0-9+\/]{4})$/i;

    var phones = {
      'zh-CN': /^(\+?0?86\-?)?1[345789]\d{9}$/,
      'zh-TW': /^(\+?886\-?|0)?9\d{8}$/,
      'en-ZA': /^(\+?27|0)\d{9}$/,
      'en-AU': /^(\+?61|0)4\d{8}$/,
      'en-HK': /^(\+?852\-?)?[569]\d{3}\-?\d{4}$/,
      'fr-FR': /^(\+?33|0)[67]\d{8}$/,
      'pt-PT': /^(\+351)?9[1236]\d{7}$/,
      'el-GR': /^(\+30)?((2\d{9})|(69\d{8}))$/,
      'en-GB': /^(\+?44|0)7\d{9}$/,
      'en-US': /^(\+?1)?[2-9]\d{2}[2-9](?!11)\d{6}$/,
      'en-ZM': /^(\+26)?09[567]\d{7}$/,
      'ru-RU': /^(\+?7|8)?9\d{9}$/,
      'nb-NO': /^(\+?47)?[49]\d{7}$/,
      'nn-NO': /^(\+?47)?[49]\d{7}$/
    };

    // from http://goo.gl/0ejHHW
    var iso8601 = /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/;

    validator.extend = function (name, fn) {
        validator[name] = function () {
            var args = Array.prototype.slice.call(arguments);
            args[0] = validator.toString(args[0]);
            return fn.apply(validator, args);
        };
    };

    //Right before exporting the validator object, pass each of the builtins
    //through extend() so that their first argument is coerced to a string
    validator.init = function () {
        for (var name in validator) {
            if (typeof validator[name] !== 'function' || name === 'toString' ||
                    name === 'toDate' || name === 'extend' || name === 'init') {
                continue;
            }
            validator.extend(name, validator[name]);
        }
    };

    validator.toString = function (input) {
        if (typeof input === 'object' && input !== null && input.toString) {
            input = input.toString();
        } else if (input === null || typeof input === 'undefined' || (isNaN(input) && !input.length)) {
            input = '';
        }
        return '' + input;
    };

    validator.toDate = function (date) {
        if (Object.prototype.toString.call(date) === '[object Date]') {
            return date;
        }
        date = Date.parse(date);
        return !isNaN(date) ? new Date(date) : null;
    };

    validator.toFloat = function (str) {
        return parseFloat(str);
    };

    validator.toInt = function (str, radix) {
        return parseInt(str, radix || 10);
    };

    validator.toBoolean = function (str, strict) {
        if (strict) {
            return str === '1' || str === 'true';
        }
        return str !== '0' && str !== 'false' && str !== '';
    };

    validator.equals = function (str, comparison) {
        return str === validator.toString(comparison);
    };

    validator.contains = function (str, elem) {
        return str.indexOf(validator.toString(elem)) >= 0;
    };

    validator.matches = function (str, pattern, modifiers) {
        if (Object.prototype.toString.call(pattern) !== '[object RegExp]') {
            pattern = new RegExp(pattern, modifiers);
        }
        return pattern.test(str);
    };

    var default_email_options = {
        allow_display_name: false,
        allow_utf8_local_part: true,
        require_tld: true
    };

    validator.isEmail = function (str, options) {
        options = merge(options, default_email_options);

        if (options.allow_display_name) {
            var display_email = str.match(displayName);
            if (display_email) {
                str = display_email[1];
            }
        }

        var parts = str.split('@')
          , domain = parts.pop()
          , user = parts.join('@');

        var lower_domain = domain.toLowerCase();
        if (lower_domain === 'gmail.com' || lower_domain === 'googlemail.com') {
            user = user.replace(/\./g, '').toLowerCase();
        }

        if (!validator.isByteLength(user, 0, 64) ||
                !validator.isByteLength(domain, 0, 256)) {
            return false;
        }

        if (!validator.isFQDN(domain, {require_tld: options.require_tld})) {
            return false;
        }

        if (user[0] === '"') {
            user = user.slice(1, user.length - 1);
            return options.allow_utf8_local_part ?
                quotedEmailUserUtf8.test(user) :
                quotedEmailUser.test(user);
        }

        var pattern = options.allow_utf8_local_part ?
            emailUserUtf8Part : emailUserPart;

        var user_parts = user.split('.');
        for (var i = 0; i < user_parts.length; i++) {
            if (!pattern.test(user_parts[i])) {
                return false;
            }
        }

        return true;
    };

    var default_url_options = {
        protocols: [ 'http', 'https', 'ftp' ]
      , require_tld: true
      , require_protocol: false
      , require_valid_protocol: true
      , allow_underscores: false
      , allow_trailing_dot: false
      , allow_protocol_relative_urls: false
    };

    validator.isURL = function (url, options) {
        if (!url || url.length >= 2083 || /\s/.test(url)) {
            return false;
        }
        if (url.indexOf('mailto:') === 0) {
            return false;
        }
        options = merge(options, default_url_options);
        var protocol, auth, host, hostname, port,
            port_str, split;
        split = url.split('://');
        if (split.length > 1) {
            protocol = split.shift();
            if (options.require_valid_protocol && options.protocols.indexOf(protocol) === -1) {
                return false;
            }
        } else if (options.require_protocol) {
            return false;
        }  else if (options.allow_protocol_relative_urls && url.substr(0, 2) === '//') {
            split[0] = url.substr(2);
        }
        url = split.join('://');
        split = url.split('#');
        url = split.shift();

        split = url.split('?');
        url = split.shift();

        split = url.split('/');
        url = split.shift();
        split = url.split('@');
        if (split.length > 1) {
            auth = split.shift();
            if (auth.indexOf(':') >= 0 && auth.split(':').length > 2) {
                return false;
            }
        }
        hostname = split.join('@');
        split = hostname.split(':');
        host = split.shift();
        if (split.length) {
            port_str = split.join(':');
            port = parseInt(port_str, 10);
            if (!/^[0-9]+$/.test(port_str) || port <= 0 || port > 65535) {
                return false;
            }
        }
        if (!validator.isIP(host) && !validator.isFQDN(host, options) &&
                host !== 'localhost') {
            return false;
        }
        if (options.host_whitelist &&
                options.host_whitelist.indexOf(host) === -1) {
            return false;
        }
        if (options.host_blacklist &&
                options.host_blacklist.indexOf(host) !== -1) {
            return false;
        }
        return true;
    };

    validator.isIP = function (str, version) {
        version = validator.toString(version);
        if (!version) {
            return validator.isIP(str, 4) || validator.isIP(str, 6);
        } else if (version === '4') {
            if (!ipv4Maybe.test(str)) {
                return false;
            }
            var parts = str.split('.').sort(function (a, b) {
                return a - b;
            });
            return parts[3] <= 255;
        } else if (version === '6') {
            var blocks = str.split(':');
            var foundOmissionBlock = false; // marker to indicate ::

            // At least some OS accept the last 32 bits of an IPv6 address
            // (i.e. 2 of the blocks) in IPv4 notation, and RFC 3493 says
            // that '::ffff:a.b.c.d' is valid for IPv4-mapped IPv6 addresses,
            // and '::a.b.c.d' is deprecated, but also valid.
            var foundIPv4TransitionBlock = validator.isIP(blocks[blocks.length - 1], 4);
            var expectedNumberOfBlocks = foundIPv4TransitionBlock ? 7 : 8;

            if (blocks.length > expectedNumberOfBlocks)
                return false;

            // initial or final ::
            if (str === '::') {
                return true;
            } else if (str.substr(0, 2) === '::') {
                blocks.shift();
                blocks.shift();
                foundOmissionBlock = true;
            } else if (str.substr(str.length - 2) === '::') {
                blocks.pop();
                blocks.pop();
                foundOmissionBlock = true;
            }

            for (var i = 0; i < blocks.length; ++i) {
                // test for a :: which can not be at the string start/end
                // since those cases have been handled above
                if (blocks[i] === '' && i > 0 && i < blocks.length -1) {
                    if (foundOmissionBlock)
                        return false; // multiple :: in address
                    foundOmissionBlock = true;
                } else if (foundIPv4TransitionBlock && i == blocks.length - 1) {
                    // it has been checked before that the last
                    // block is a valid IPv4 address
                } else if (!ipv6Block.test(blocks[i])) {
                    return false;
                }
            }

            if (foundOmissionBlock) {
                return blocks.length >= 1;
            } else {
                return blocks.length === expectedNumberOfBlocks;
            }
        }
        return false;
    };

    var default_fqdn_options = {
        require_tld: true
      , allow_underscores: false
      , allow_trailing_dot: false
    };

    validator.isFQDN = function (str, options) {
        options = merge(options, default_fqdn_options);

        /* Remove the optional trailing dot before checking validity */
        if (options.allow_trailing_dot && str[str.length - 1] === '.') {
            str = str.substring(0, str.length - 1);
        }
        var parts = str.split('.');
        if (options.require_tld) {
            var tld = parts.pop();
            if (!parts.length || !/^([a-z\u00a1-\uffff]{2,}|xn[a-z0-9-]{2,})$/i.test(tld)) {
                return false;
            }
        }
        for (var part, i = 0; i < parts.length; i++) {
            part = parts[i];
            if (options.allow_underscores) {
                if (part.indexOf('__') >= 0) {
                    return false;
                }
                part = part.replace(/_/g, '');
            }
            if (!/^[a-z\u00a1-\uffff0-9-]+$/i.test(part)) {
                return false;
            }
            if (/[\uff01-\uff5e]/.test(part)) {
                // disallow full-width chars
                return false;
            }
            if (part[0] === '-' || part[part.length - 1] === '-' ||
                    part.indexOf('---') >= 0) {
                return false;
            }
        }
        return true;
    };

    validator.isBoolean = function(str) {
        return (['true', 'false', '1', '0'].indexOf(str) >= 0);
    };

    validator.isAlpha = function (str) {
        return alpha.test(str);
    };

    validator.isAlphanumeric = function (str) {
        return alphanumeric.test(str);
    };

    validator.isNumeric = function (str) {
        return numeric.test(str);
    };

    validator.isDecimal = function (str) {
        return str !== '' && decimal.test(str);
    };

    validator.isHexadecimal = function (str) {
        return hexadecimal.test(str);
    };

    validator.isHexColor = function (str) {
        return hexcolor.test(str);
    };

    validator.isLowercase = function (str) {
        return str === str.toLowerCase();
    };

    validator.isUppercase = function (str) {
        return str === str.toUpperCase();
    };

    validator.isInt = function (str, options) {
        options = options || {};
        return int.test(str) && (!options.hasOwnProperty('min') || str >= options.min) && (!options.hasOwnProperty('max') || str <= options.max);
    };

    validator.isFloat = function (str, options) {
        options = options || {};
        if (str === '' || str === '.') {
            return false;
        }
        return float.test(str) && (!options.hasOwnProperty('min') || str >= options.min) && (!options.hasOwnProperty('max') || str <= options.max);
    };

    validator.isDivisibleBy = function (str, num) {
        return validator.toFloat(str) % validator.toInt(num) === 0;
    };

    validator.isNull = function (str) {
        return str.length === 0;
    };

    validator.isLength = function (str, min, max) {
        var surrogatePairs = str.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g) || [];
        var len = str.length - surrogatePairs.length;
        return len >= min && (typeof max === 'undefined' || len <= max);
    };

    validator.isByteLength = function (str, min, max) {
        var len = encodeURI(str).split(/%..|./).length - 1;
        return len >= min && (typeof max === 'undefined' || len <= max);
    };

    validator.isUUID = function (str, version) {
        var pattern = uuid[version ? version : 'all'];
        return pattern && pattern.test(str);
    };

    function getTimezoneOffset(str) {
        var iso8601Parts = str.match(iso8601)
          , timezone, sign, hours, minutes;
        if (!iso8601Parts) {
            str = str.toLowerCase();
            timezone = str.match(/(?:\s|gmt\s*)(-|\+)(\d{1,4})(\s|$)/);
            if (!timezone) {
                return str.indexOf('gmt') !== -1 ? 0 : null;
            }
            sign = timezone[1];
            var offset = timezone[2];
            if (offset.length === 3) {
                offset = '0' + offset;
            }
            if (offset.length <= 2) {
                hours = 0;
                minutes = parseInt(offset);
            } else {
                hours = parseInt(offset.slice(0, 2));
                minutes = parseInt(offset.slice(2, 4));
            }
        } else {
            timezone = iso8601Parts[21];
            if (!timezone || timezone === 'z' || timezone === 'Z') {
                return 0;
            }
            sign = iso8601Parts[22];
            if (timezone.indexOf(':') !== -1) {
                hours = parseInt(iso8601Parts[23]);
                minutes = parseInt(iso8601Parts[24]);
            } else {
                hours = 0;
                minutes = parseInt(iso8601Parts[23]);
            }
        }
        return (hours * 60 + minutes) * (sign === '-' ? 1 : -1);
    }

    validator.isDate = function (str) {
        var normalizedDate = new Date(Date.parse(str));
        if (isNaN(normalizedDate)) {
            return false;
        }
        // normalizedDate is in the user's timezone. Apply the input
        // timezone offset to the date so that the year and day match
        // the input
        var timezoneOffset = getTimezoneOffset(str);
        if (timezoneOffset !== null) {
            var timezoneDifference = normalizedDate.getTimezoneOffset() -
                timezoneOffset;
            normalizedDate = new Date(normalizedDate.getTime() +
                60000 * timezoneDifference);
        }
        var day = String(normalizedDate.getDate());
        var dayOrYear, dayOrYearMatches, year;
        //check for valid double digits that could be late days
        //check for all matches since a string like '12/23' is a valid date
        //ignore everything with nearby colons
        dayOrYearMatches = str.match(/(^|[^:\d])[23]\d([^:\d]|$)/g);
        if (!dayOrYearMatches) {
            return true;
        }
        dayOrYear = dayOrYearMatches.map(function(digitString) {
            return digitString.match(/\d+/g)[0];
        }).join('/');
        year = String(normalizedDate.getFullYear()).slice(-2);
        if (dayOrYear === day || dayOrYear === year) {
            return true;
        } else if ((dayOrYear === (day + '/' + year)) || (dayOrYear === (year + '/' + day))) {
            return true;
        }
        return false;
    };

    validator.isAfter = function (str, date) {
        var comparison = validator.toDate(date || new Date())
          , original = validator.toDate(str);
        return !!(original && comparison && original > comparison);
    };

    validator.isBefore = function (str, date) {
        var comparison = validator.toDate(date || new Date())
          , original = validator.toDate(str);
        return !!(original && comparison && original < comparison);
    };

    validator.isIn = function (str, options) {
        var i;
        if (Object.prototype.toString.call(options) === '[object Array]') {
            var array = [];
            for (i in options) {
                array[i] = validator.toString(options[i]);
            }
            return array.indexOf(str) >= 0;
        } else if (typeof options === 'object') {
            return options.hasOwnProperty(str);
        } else if (options && typeof options.indexOf === 'function') {
            return options.indexOf(str) >= 0;
        }
        return false;
    };

    validator.isCreditCard = function (str) {
        var sanitized = str.replace(/[^0-9]+/g, '');
        if (!creditCard.test(sanitized)) {
            return false;
        }
        var sum = 0, digit, tmpNum, shouldDouble;
        for (var i = sanitized.length - 1; i >= 0; i--) {
            digit = sanitized.substring(i, (i + 1));
            tmpNum = parseInt(digit, 10);
            if (shouldDouble) {
                tmpNum *= 2;
                if (tmpNum >= 10) {
                    sum += ((tmpNum % 10) + 1);
                } else {
                    sum += tmpNum;
                }
            } else {
                sum += tmpNum;
            }
            shouldDouble = !shouldDouble;
        }
        return !!((sum % 10) === 0 ? sanitized : false);
    };

    validator.isISIN = function (str) {
        if (!isin.test(str)) {
            return false;
        }

        var checksumStr = str.replace(/[A-Z]/g, function(character) {
            return parseInt(character, 36);
        });

        var sum = 0, digit, tmpNum, shouldDouble = true;
        for (var i = checksumStr.length - 2; i >= 0; i--) {
            digit = checksumStr.substring(i, (i + 1));
            tmpNum = parseInt(digit, 10);
            if (shouldDouble) {
                tmpNum *= 2;
                if (tmpNum >= 10) {
                    sum += tmpNum + 1;
                } else {
                    sum += tmpNum;
                }
            } else {
                sum += tmpNum;
            }
            shouldDouble = !shouldDouble;
        }

        return parseInt(str.substr(str.length - 1), 10) === (10000 - sum) % 10;
    };

    validator.isISBN = function (str, version) {
        version = validator.toString(version);
        if (!version) {
            return validator.isISBN(str, 10) || validator.isISBN(str, 13);
        }
        var sanitized = str.replace(/[\s-]+/g, '')
          , checksum = 0, i;
        if (version === '10') {
            if (!isbn10Maybe.test(sanitized)) {
                return false;
            }
            for (i = 0; i < 9; i++) {
                checksum += (i + 1) * sanitized.charAt(i);
            }
            if (sanitized.charAt(9) === 'X') {
                checksum += 10 * 10;
            } else {
                checksum += 10 * sanitized.charAt(9);
            }
            if ((checksum % 11) === 0) {
                return !!sanitized;
            }
        } else  if (version === '13') {
            if (!isbn13Maybe.test(sanitized)) {
                return false;
            }
            var factor = [ 1, 3 ];
            for (i = 0; i < 12; i++) {
                checksum += factor[i % 2] * sanitized.charAt(i);
            }
            if (sanitized.charAt(12) - ((10 - (checksum % 10)) % 10) === 0) {
                return !!sanitized;
            }
        }
        return false;
    };

    validator.isMobilePhone = function(str, locale) {
        if (locale in phones) {
            return phones[locale].test(str);
        }
        return false;
    };

    var default_currency_options = {
        symbol: '$'
      , require_symbol: false
      , allow_space_after_symbol: false
      , symbol_after_digits: false
      , allow_negatives: true
      , parens_for_negatives: false
      , negative_sign_before_digits: false
      , negative_sign_after_digits: false
      , allow_negative_sign_placeholder: false
      , thousands_separator: ','
      , decimal_separator: '.'
      , allow_space_after_digits: false
    };

    validator.isCurrency = function (str, options) {
        options = merge(options, default_currency_options);

        return currencyRegex(options).test(str);
    };

    validator.isJSON = function (str) {
        try {
            var obj = JSON.parse(str);
            return !!obj && typeof obj === 'object';
        } catch (e) {}
        return false;
    };

    validator.isMultibyte = function (str) {
        return multibyte.test(str);
    };

    validator.isAscii = function (str) {
        return ascii.test(str);
    };

    validator.isFullWidth = function (str) {
        return fullWidth.test(str);
    };

    validator.isHalfWidth = function (str) {
        return halfWidth.test(str);
    };

    validator.isVariableWidth = function (str) {
        return fullWidth.test(str) && halfWidth.test(str);
    };

    validator.isSurrogatePair = function (str) {
        return surrogatePair.test(str);
    };

    validator.isBase64 = function (str) {
        return base64.test(str);
    };

    validator.isMongoId = function (str) {
        return validator.isHexadecimal(str) && str.length === 24;
    };

    validator.isISO8601 = function (str) {
        return iso8601.test(str);
    };

    validator.ltrim = function (str, chars) {
        var pattern = chars ? new RegExp('^[' + chars + ']+', 'g') : /^\s+/g;
        return str.replace(pattern, '');
    };

    validator.rtrim = function (str, chars) {
        var pattern = chars ? new RegExp('[' + chars + ']+$', 'g') : /\s+$/g;
        return str.replace(pattern, '');
    };

    validator.trim = function (str, chars) {
        var pattern = chars ? new RegExp('^[' + chars + ']+|[' + chars + ']+$', 'g') : /^\s+|\s+$/g;
        return str.replace(pattern, '');
    };

    validator.escape = function (str) {
        return (str.replace(/&/g, '&amp;')
            .replace(/"/g, '&quot;')
            .replace(/'/g, '&#x27;')
            .replace(/</g, '&lt;')
            .replace(/>/g, '&gt;')
            .replace(/\//g, '&#x2F;')
            .replace(/\`/g, '&#96;'));
    };

    validator.stripLow = function (str, keep_new_lines) {
        var chars = keep_new_lines ? '\\x00-\\x09\\x0B\\x0C\\x0E-\\x1F\\x7F' : '\\x00-\\x1F\\x7F';
        return validator.blacklist(str, chars);
    };

    validator.whitelist = function (str, chars) {
        return str.replace(new RegExp('[^' + chars + ']+', 'g'), '');
    };

    validator.blacklist = function (str, chars) {
        return str.replace(new RegExp('[' + chars + ']+', 'g'), '');
    };

    var default_normalize_email_options = {
        lowercase: true
    };

    validator.normalizeEmail = function (email, options) {
        options = merge(options, default_normalize_email_options);
        if (!validator.isEmail(email)) {
            return false;
        }
        var parts = email.split('@', 2);
        parts[1] = parts[1].toLowerCase();
        if (parts[1] === 'gmail.com' || parts[1] === 'googlemail.com') {
            parts[0] = parts[0].toLowerCase().replace(/\./g, '');
            if (parts[0][0] === '+') {
                return false;
            }
            parts[0] = parts[0].split('+')[0];
            parts[1] = 'gmail.com';
        } else if (options.lowercase) {
            parts[0] = parts[0].toLowerCase();
        }
        return parts.join('@');
    };

    function merge(obj, defaults) {
        obj = obj || {};
        for (var key in defaults) {
            if (typeof obj[key] === 'undefined') {
                obj[key] = defaults[key];
            }
        }
        return obj;
    }

    function currencyRegex(options) {
        var symbol = '(\\' + options.symbol.replace(/\./g, '\\.') + ')' + (options.require_symbol ? '' : '?')
            , negative = '-?'
            , whole_dollar_amount_without_sep = '[1-9]\\d*'
            , whole_dollar_amount_with_sep = '[1-9]\\d{0,2}(\\' + options.thousands_separator + '\\d{3})*'
            , valid_whole_dollar_amounts = ['0', whole_dollar_amount_without_sep, whole_dollar_amount_with_sep]
            , whole_dollar_amount = '(' + valid_whole_dollar_amounts.join('|') + ')?'
            , decimal_amount = '(\\' + options.decimal_separator + '\\d{2})?';
        var pattern = whole_dollar_amount + decimal_amount;
        // default is negative sign before symbol, but there are two other options (besides parens)
        if (options.allow_negatives && !options.parens_for_negatives) {
            if (options.negative_sign_after_digits) {
                pattern += negative;
            }
            else if (options.negative_sign_before_digits) {
                pattern = negative + pattern;
            }
        }
        // South African Rand, for example, uses R 123 (space) and R-123 (no space)
        if (options.allow_negative_sign_placeholder) {
            pattern = '( (?!\\-))?' + pattern;
        }
        else if (options.allow_space_after_symbol) {
            pattern = ' ?' + pattern;
        }
        else if (options.allow_space_after_digits) {
            pattern += '( (?!$))?';
        }
        if (options.symbol_after_digits) {
            pattern += symbol;
        } else {
            pattern = symbol + pattern;
        }
        if (options.allow_negatives) {
            if (options.parens_for_negatives) {
                pattern = '(\\(' + pattern + '\\)|' + pattern + ')';
            }
            else if (!(options.negative_sign_before_digits || options.negative_sign_after_digits)) {
                pattern = negative + pattern;
            }
        }
        return new RegExp(
            '^' +
            // ensure there's a dollar and/or decimal amount, and that it doesn't start with a space or a negative sign followed by a space
            '(?!-? )(?=.*\\d)' +
            pattern +
            '$'
        );
    }

    validator.init();

    return validator;

});