/*!
 * @copyright Copyright © Kartik Visweswaran, Krajee.com, 2014 - 2020
 * @version 1.3.6
 *
 * Date formatter utility library that allows formatting date/time variables or Date objects using PHP DateTime format.
 * This library is a standalone javascript library and does not depend on other libraries or plugins like jQuery. The
 * library also adds support for Universal Module Definition (UMD).
 * 
 * @see http://php.net/manual/en/function.date.php
 *
 * For more JQuery plugins visit http://plugins.krajee.com
 * For more Yii related demos visit http://demos.krajee.com
 */
(function (root, factory) {
    // noinspection JSUnresolvedVariable
    if (typeof define === 'function' && define.amd) { // AMD
        // noinspection JSUnresolvedFunction
        define([], factory);
    } else {
        // noinspection JSUnresolvedVariable
        if (typeof module === 'object' && module.exports) { // Node
            // noinspection JSUnresolvedVariable
            module.exports = factory();
        } else { // Browser globals
            root.DateFormatter = factory();
        }
    }
}(typeof self !== 'undefined' ? self : this, function () {
    var DateFormatter, $h;
    /**
     * Global helper object
     */
    $h = {
        DAY: 1000 * 60 * 60 * 24,
        HOUR: 3600,
        defaults: {
            dateSettings: {
                days: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
                daysShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
                months: [
                    'January', 'February', 'March', 'April', 'May', 'June', 'July',
                    'August', 'September', 'October', 'November', 'December'
                ],
                monthsShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
                meridiem: ['AM', 'PM'],
                ordinal: function (number) {
                    var n = number % 10, suffixes = {1: 'st', 2: 'nd', 3: 'rd'};
                    return Math.floor(number % 100 / 10) === 1 || !suffixes[n] ? 'th' : suffixes[n];
                }
            },
            separators: /[ \-+\/.:@]/g,
            validParts: /[dDjlNSwzWFmMntLoYyaABgGhHisueTIOPZcrU]/g,
            intParts: /[djwNzmnyYhHgGis]/g,
            tzParts: /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
            tzClip: /[^-+\dA-Z]/g
        },
        getInt: function (str, radix) {
            return parseInt(str, (radix ? radix : 10));
        },
        compare: function (str1, str2) {
            return typeof (str1) === 'string' && typeof (str2) === 'string' && str1.toLowerCase() === str2.toLowerCase();
        },
        lpad: function (value, length, chr) {
            var val = value.toString();
            chr = chr || '0';
            return val.length < length ? $h.lpad(chr + val, length) : val;
        },
        merge: function (out) {
            var i, obj;
            out = out || {};
            for (i = 1; i < arguments.length; i++) {
                obj = arguments[i];
                if (!obj) {
                    continue;
                }
                for (var key in obj) {
                    if (obj.hasOwnProperty(key)) {
                        if (typeof obj[key] === 'object') {
                            $h.merge(out[key], obj[key]);
                        } else {
                            out[key] = obj[key];
                        }
                    }
                }
            }
            return out;
        },
        getIndex: function (val, arr) {
            for (var i = 0; i < arr.length; i++) {
                if (arr[i].toLowerCase() === val.toLowerCase()) {
                    return i;
                }
            }
            return -1;
        }
    };

    /**
     * Date Formatter Library Constructor
     * @param options
     * @constructor
     */
    DateFormatter = function (options) {
        var self = this, config = $h.merge($h.defaults, options);
        self.dateSettings = config.dateSettings;
        self.separators = config.separators;
        self.validParts = config.validParts;
        self.intParts = config.intParts;
        self.tzParts = config.tzParts;
        self.tzClip = config.tzClip;
    };

    /**
     * DateFormatter Library Prototype
     */
    DateFormatter.prototype = {
        constructor: DateFormatter,
        getMonth: function (val) {
            var self = this, i;
            i = $h.getIndex(val, self.dateSettings.monthsShort) + 1;
            if (i === 0) {
                i = $h.getIndex(val, self.dateSettings.months) + 1;
            }
            return i;
        },
        parseDate: function (vDate, vFormat) {
            var self = this, vFormatParts, vDateParts, i, vDateFlag = false, vTimeFlag = false, vDatePart, iDatePart,
                vSettings = self.dateSettings, vMonth, vMeriIndex, vMeriOffset, len, mer,
                out = {date: null, year: null, month: null, day: null, hour: 0, min: 0, sec: 0};
            if (!vDate) {
                return null;
            }
            if (vDate instanceof Date) {
                return vDate;
            }
            if (vFormat === 'U') {
                i = $h.getInt(vDate);
                return i ? new Date(i * 1000) : vDate;
            }
            switch (typeof vDate) {
                case 'number':
                    return new Date(vDate);
                case 'string':
                    break;
                default:
                    return null;
            }
            vFormatParts = vFormat.match(self.validParts);
            if (!vFormatParts || vFormatParts.length === 0) {
                throw new Error('Invalid date format definition.');
            }
            for (i = vFormatParts.length - 1; i >= 0; i--) {
                if (vFormatParts[i] === 'S') {
                    vFormatParts.splice(i, 1);
                }
            }
            vDateParts = vDate.replace(self.separators, '\0').split('\0');
            for (i = 0; i < vDateParts.length; i++) {
                vDatePart = vDateParts[i];
                iDatePart = $h.getInt(vDatePart);
                switch (vFormatParts[i]) {
                    case 'y':
                    case 'Y':
                        if (iDatePart) {
                            len = vDatePart.length;
                            out.year = len === 2 ? $h.getInt((iDatePart < 70 ? '20' : '19') + vDatePart) : iDatePart;
                        } else {
                            return null;
                        }
                        vDateFlag = true;
                        break;
                    case 'm':
                    case 'n':
                    case 'M':
                    case 'F':
                        if (isNaN(iDatePart)) {
                            vMonth = self.getMonth(vDatePart);
                            if (vMonth > 0) {
                                out.month = vMonth;
                            } else {
                                return null;
                            }
                        } else {
                            if (iDatePart >= 1 && iDatePart <= 12) {
                                out.month = iDatePart;
                            } else {
                                return null;
                            }
                        }
                        vDateFlag = true;
                        break;
                    case 'd':
                    case 'j':
                        if (iDatePart >= 1 && iDatePart <= 31) {
                            out.day = iDatePart;
                        } else {
                            return null;
                        }
                        vDateFlag = true;
                        break;
                    case 'g':
                    case 'h':
                        vMeriIndex = (vFormatParts.indexOf('a') > -1) ? vFormatParts.indexOf('a') :
                            ((vFormatParts.indexOf('A') > -1) ? vFormatParts.indexOf('A') : -1);
                        mer = vDateParts[vMeriIndex];
                        if (vMeriIndex !== -1) {
                            vMeriOffset = $h.compare(mer, vSettings.meridiem[0]) ? 0 :
                                ($h.compare(mer, vSettings.meridiem[1]) ? 12 : -1);
                            if (iDatePart >= 1 && iDatePart <= 12 && vMeriOffset !== -1) {
                                out.hour = iDatePart % 12 === 0 ? vMeriOffset : iDatePart + vMeriOffset;
                            } else {
                                if (iDatePart >= 0 && iDatePart <= 23) {
                                    out.hour = iDatePart;
                                }
                            }
                        } else {
                            if (iDatePart >= 0 && iDatePart <= 23) {
                                out.hour = iDatePart;
                            } else {
                                return null;
                            }
                        }
                        vTimeFlag = true;
                        break;
                    case 'G':
                    case 'H':
                        if (iDatePart >= 0 && iDatePart <= 23) {
                            out.hour = iDatePart;
                        } else {
                            return null;
                        }
                        vTimeFlag = true;
                        break;
                    case 'i':
                        if (iDatePart >= 0 && iDatePart <= 59) {
                            out.min = iDatePart;
                        } else {
                            return null;
                        }
                        vTimeFlag = true;
                        break;
                    case 's':
                        if (iDatePart >= 0 && iDatePart <= 59) {
                            out.sec = iDatePart;
                        } else {
                            return null;
                        }
                        vTimeFlag = true;
                        break;
                }
            }
            if (vDateFlag === true) {
                var varY = out.year || 0, varM = out.month ? out.month - 1 : 0, varD = out.day || 1;
                out.date = new Date(varY, varM, varD, out.hour, out.min, out.sec, 0);
            } else {
                if (vTimeFlag !== true) {
                    return null;
                }
                out.date = new Date(0, 0, 0, out.hour, out.min, out.sec, 0);
            }
            return out.date;
        },
        guessDate: function (vDateStr, vFormat) {
            if (typeof vDateStr !== 'string') {
                return vDateStr;
            }
            var self = this, vParts = vDateStr.replace(self.separators, '\0').split('\0'), vPattern = /^[djmn]/g, len,
                vFormatParts = vFormat.match(self.validParts), vDate = new Date(), vDigit = 0, vYear, i, n, iPart, iSec;

            if (!vPattern.test(vFormatParts[0])) {
                return vDateStr;
            }

            for (i = 0; i < vParts.length; i++) {
                vDigit = 2;
                iPart = vParts[i];
                iSec = $h.getInt(iPart.substr(0, 2));
                if (isNaN(iSec)) {
                    return null;
                }
                switch (i) {
                    case 0:
                        if (vFormatParts[0] === 'm' || vFormatParts[0] === 'n') {
                            vDate.setMonth(iSec - 1);
                        } else {
                            vDate.setDate(iSec);
                        }
                        break;
                    case 1:
                        if (vFormatParts[0] === 'm' || vFormatParts[0] === 'n') {
                            vDate.setDate(iSec);
                        } else {
                            vDate.setMonth(iSec - 1);
                        }
                        break;
                    case 2:
                        vYear = vDate.getFullYear();
                        len = iPart.length;
                        vDigit = len < 4 ? len : 4;
                        vYear = $h.getInt(len < 4 ? vYear.toString().substr(0, 4 - len) + iPart : iPart.substr(0, 4));
                        if (!vYear) {
                            return null;
                        }
                        vDate.setFullYear(vYear);
                        break;
                    case 3:
                        vDate.setHours(iSec);
                        break;
                    case 4:
                        vDate.setMinutes(iSec);
                        break;
                    case 5:
                        vDate.setSeconds(iSec);
                        break;
                }
                n = iPart.substr(vDigit);
                if (n.length > 0) {
                    vParts.splice(i + 1, 0, n);
                }
            }
            return vDate;
        },
        parseFormat: function (vChar, vDate) {
            var self = this, vSettings = self.dateSettings, fmt, backslash = /\\?(.?)/gi, doFormat = function (t, s) {
                return fmt[t] ? fmt[t]() : s;
            };
            fmt = {
                /////////
                // DAY //
                /////////
                /**
                 * Day of month with leading 0: `01..31`
                 * @return {string}
                 */
                d: function () {
                    return $h.lpad(fmt.j(), 2);
                },
                /**
                 * Shorthand day name: `Mon...Sun`
                 * @return {string}
                 */
                D: function () {
                    return vSettings.daysShort[fmt.w()];
                },
                /**
                 * Day of month: `1..31`
                 * @return {number}
                 */
                j: function () {
                    return vDate.getDate();
                },
                /**
                 * Full day name: `Monday...Sunday`
                 * @return {string}
                 */
                l: function () {
                    return vSettings.days[fmt.w()];
                },
                /**
                 * ISO-8601 day of week: `1[Mon]..7[Sun]`
                 * @return {number}
                 */
                N: function () {
                    return fmt.w() || 7;
                },
                /**
                 * Day of week: `0[Sun]..6[Sat]`
                 * @return {number}
                 */
                w: function () {
                    return vDate.getDay();
                },
                /**
                 * Day of year: `0..365`
                 * @return {number}
                 */
                z: function () {
                    var a = new Date(fmt.Y(), fmt.n() - 1, fmt.j()), b = new Date(fmt.Y(), 0, 1);
                    return Math.round((a - b) / $h.DAY);
                },

                //////////
                // WEEK //
                //////////
                /**
                 * ISO-8601 week number
                 * @return {number}
                 */
                W: function () {
                    var a = new Date(fmt.Y(), fmt.n() - 1, fmt.j() - fmt.N() + 3), b = new Date(a.getFullYear(), 0, 4);
                    return $h.lpad(1 + Math.round((a - b) / $h.DAY / 7), 2);
                },

                ///////////
                // MONTH //
                ///////////
                /**
                 * Full month name: `January...December`
                 * @return {string}
                 */
                F: function () {
                    return vSettings.months[vDate.getMonth()];
                },
                /**
                 * Month w/leading 0: `01..12`
                 * @return {string}
                 */
                m: function () {
                    return $h.lpad(fmt.n(), 2);
                },
                /**
                 * Shorthand month name; `Jan...Dec`
                 * @return {string}
                 */
                M: function () {
                    return vSettings.monthsShort[vDate.getMonth()];
                },
                /**
                 * Month: `1...12`
                 * @return {number}
                 */
                n: function () {
                    return vDate.getMonth() + 1;
                },
                /**
                 * Days in month: `28...31`
                 * @return {number}
                 */
                t: function () {
                    return (new Date(fmt.Y(), fmt.n(), 0)).getDate();
                },

                //////////
                // YEAR //
                //////////
                /**
                 * Is leap year? `0 or 1`
                 * @return {number}
                 */
                L: function () {
                    var Y = fmt.Y();
                    return (Y % 4 === 0 && Y % 100 !== 0 || Y % 400 === 0) ? 1 : 0;
                },
                /**
                 * ISO-8601 year
                 * @return {number}
                 */
                o: function () {
                    var n = fmt.n(), W = fmt.W(), Y = fmt.Y();
                    return Y + (n === 12 && W < 9 ? 1 : n === 1 && W > 9 ? -1 : 0);
                },
                /**
                 * Full year: `e.g. 1980...2010`
                 * @return {number}
                 */
                Y: function () {
                    return vDate.getFullYear();
                },
                /**
                 * Last two digits of year: `00...99`
                 * @return {string}
                 */
                y: function () {
                    return fmt.Y().toString().slice(-2);
                },

                //////////
                // TIME //
                //////////
                /**
                 * Meridian lower: `am or pm`
                 * @return {string}
                 */
                a: function () {
                    return fmt.A().toLowerCase();
                },
                /**
                 * Meridian upper: `AM or PM`
                 * @return {string}
                 */
                A: function () {
                    var n = fmt.G() < 12 ? 0 : 1;
                    return vSettings.meridiem[n];
                },
                /**
                 * Swatch Internet time: `000..999`
                 * @return {string}
                 */
                B: function () {
                    var H = vDate.getUTCHours() * $h.HOUR, i = vDate.getUTCMinutes() * 60, s = vDate.getUTCSeconds();
                    return $h.lpad(Math.floor((H + i + s + $h.HOUR) / 86.4) % 1000, 3);
                },
                /**
                 * 12-Hours: `1..12`
                 * @return {number}
                 */
                g: function () {
                    return fmt.G() % 12 || 12;
                },
                /**
                 * 24-Hours: `0..23`
                 * @return {number}
                 */
                G: function () {
                    return vDate.getHours();
                },
                /**
                 * 12-Hours with leading 0: `01..12`
                 * @return {string}
                 */
                h: function () {
                    return $h.lpad(fmt.g(), 2);
                },
                /**
                 * 24-Hours w/leading 0: `00..23`
                 * @return {string}
                 */
                H: function () {
                    return $h.lpad(fmt.G(), 2);
                },
                /**
                 * Minutes w/leading 0: `00..59`
                 * @return {string}
                 */
                i: function () {
                    return $h.lpad(vDate.getMinutes(), 2);
                },
                /**
                 * Seconds w/leading 0: `00..59`
                 * @return {string}
                 */
                s: function () {
                    return $h.lpad(vDate.getSeconds(), 2);
                },
                /**
                 * Microseconds: `000000-999000`
                 * @return {string}
                 */
                u: function () {
                    return $h.lpad(vDate.getMilliseconds() * 1000, 6);
                },

                //////////////
                // TIMEZONE //
                //////////////
                /**
                 * Timezone identifier: `e.g. Atlantic/Azores, ...`
                 * @return {string}
                 */
                e: function () {
                    var str = /\((.*)\)/.exec(String(vDate))[1];
                    return str || 'Coordinated Universal Time';
                },
                /**
                 * DST observed? `0 or 1`
                 * @return {number}
                 */
                I: function () {
                    var a = new Date(fmt.Y(), 0), c = Date.UTC(fmt.Y(), 0),
                        b = new Date(fmt.Y(), 6), d = Date.UTC(fmt.Y(), 6);
                    return ((a - c) !== (b - d)) ? 1 : 0;
                },
                /**
                 * Difference to GMT in hour format: `e.g. +0200`
                 * @return {string}
                 */
                O: function () {
                    var tzo = vDate.getTimezoneOffset(), a = Math.abs(tzo);
                    return (tzo > 0 ? '-' : '+') + $h.lpad(Math.floor(a / 60) * 100 + a % 60, 4);
                },
                /**
                 * Difference to GMT with colon: `e.g. +02:00`
                 * @return {string}
                 */
                P: function () {
                    var O = fmt.O();
                    return (O.substr(0, 3) + ':' + O.substr(3, 2));
                },
                /**
                 * Timezone abbreviation: `e.g. EST, MDT, ...`
                 * @return {string}
                 */
                T: function () {
                    var str = (String(vDate).match(self.tzParts) || ['']).pop().replace(self.tzClip, '');
                    return str || 'UTC';
                },
                /**
                 * Timezone offset in seconds: `-43200...50400`
                 * @return {number}
                 */
                Z: function () {
                    return -vDate.getTimezoneOffset() * 60;
                },

                ////////////////////
                // FULL DATE TIME //
                ////////////////////
                /**
                 * ISO-8601 date
                 * @return {string}
                 */
                c: function () {
                    return 'Y-m-d\\TH:i:sP'.replace(backslash, doFormat);
                },
                /**
                 * RFC 2822 date
                 * @return {string}
                 */
                r: function () {
                    return 'D, d M Y H:i:s O'.replace(backslash, doFormat);
                },
                /**
                 * Seconds since UNIX epoch
                 * @return {number}
                 */
                U: function () {
                    return vDate.getTime() / 1000 || 0;
                }
            };
            return doFormat(vChar, vChar);
        },
        formatDate: function (vDate, vFormat) {
            var self = this, i, n, len, str, vChar, vDateStr = '', BACKSLASH = '\\';
            if (typeof vDate === 'string') {
                vDate = self.parseDate(vDate, vFormat);
                if (!vDate) {
                    return null;
                }
            }
            if (vDate instanceof Date) {
                len = vFormat.length;
                for (i = 0; i < len; i++) {
                    vChar = vFormat.charAt(i);
                    if (vChar === 'S' || vChar === BACKSLASH) {
                        continue;
                    }
                    if (i > 0 && vFormat.charAt(i - 1) === BACKSLASH) {
                        vDateStr += vChar;
                        continue;
                    }
                    str = self.parseFormat(vChar, vDate);
                    if (i !== (len - 1) && self.intParts.test(vChar) && vFormat.charAt(i + 1) === 'S') {
                        n = $h.getInt(str) || 0;
                        str += self.dateSettings.ordinal(n);
                    }
                    vDateStr += str;
                }
                return vDateStr;
            }
            return '';
        }
    };
    return DateFormatter;
}));