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datetime.go
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package fakegen
import (
"context"
"fmt"
"math/rand"
"reflect"
"time"
)
var century = []string{"I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X", "XI", "XII", "XIII", "XIV", "XV", "XVI", "XVII", "XVIII", "XIX", "XX", "XXI"}
var timezones = []string{
"Australia/Adelaide",
"Australia/Broken_Hill",
"Australia/South",
"Australia/Yancowinna",
"Australia/Darwin",
"Australia/North",
"America/Eirunepe",
"America/Porto_Acre",
"America/Rio_Branco",
"Brazil/Acre",
"Australia/Eucla",
"Australia/ACT",
"Australia/Canberra",
"Australia/Currie",
"Australia/Hobart",
"Australia/Melbourne",
"Australia/NSW",
"Australia/Sydney",
"Australia/Tasmania",
"Australia/Victoria",
"Australia/Brisbane",
"Australia/Lindeman",
"Australia/Queensland",
"Asia/Kabul",
"America/Anchorage",
"America/Juneau",
"America/Nome",
"America/Sitka",
"America/Yakutat",
"US/Alaska",
"Asia/Almaty",
"America/Boa_Vista",
"America/Campo_Grande",
"America/Cuiaba",
"America/Manaus",
"America/Porto_Velho",
"Asia/Yerevan",
"Brazil/West",
"Asia/Anadyr",
"Asia/Aqtau",
"Asia/Aqtobe",
"America/Argentina/Buenos_Aires",
"America/Argentina/Catamarca",
"America/Argentina/ComodRivadavia",
"America/Argentina/Cordoba",
"America/Argentina/Jujuy",
"America/Argentina/La_Rioja",
"America/Argentina/Mendoza",
"America/Argentina/Rio_Gallegos",
"America/Argentina/Salta",
"America/Argentina/San_Juan",
"America/Argentina/San_Luis",
"America/Argentina/Tucuman",
"America/Argentina/Ushuaia",
"America/Buenos_Aires",
"America/Catamarca",
"America/Cordoba",
"America/Jujuy",
"America/Mendoza",
"America/Rosario",
"America/Anguilla",
"America/Antigua",
"America/Aruba",
"America/Barbados",
"America/Blanc-Sablon",
"America/Curacao",
"America/Dominica",
"America/Glace_Bay",
"America/Goose_Bay",
"America/Grand_Turk",
"America/Grenada",
"America/Guadeloupe",
"America/Halifax",
"America/Kralendijk",
"America/Lower_Princes",
"America/Marigot",
"America/Martinique",
"America/Moncton",
"America/Montserrat",
"America/Port_of_Spain",
"America/Puerto_Rico",
"America/Santo_Domingo",
"America/St_Barthelemy",
"America/St_Kitts",
"America/St_Lucia",
"America/St_Thomas",
"America/St_Vincent",
"America/Thule",
"America/Tortola",
"America/Virgin",
"Asia/Aden",
"Asia/Baghdad",
"Asia/Bahrain",
"Asia/Kuwait",
"Asia/Qatar",
"Asia/Riyadh",
"Atlantic/Bermuda",
"Canada/Atlantic",
"Antarctica/Casey",
"Australia/Perth",
"Australia/West",
"Atlantic/Azores",
"Asia/Baku",
"Asia/Dacca",
"Asia/Dhaka",
"Asia/Brunei",
"America/La_Paz",
"America/Araguaina",
"America/Bahia",
"America/Belem",
"America/Fortaleza",
"America/Maceio",
"America/Recife",
"America/Santarem",
"America/Sao_Paulo",
"Brazil/East",
"Pacific/Bougainville",
"Asia/Thimbu",
"Asia/Thimphu",
"Africa/Blantyre",
"Africa/Bujumbura",
"Africa/Gaborone",
"Africa/Harare",
"Africa/Kigali",
"Africa/Lubumbashi",
"Africa/Lusaka",
"Africa/Maputo",
"Indian/Cocos",
"Africa/Algiers",
"Africa/Ceuta",
"Africa/Tunis",
"Arctic/Longyearbyen",
"Atlantic/Jan_Mayen",
"CET",
"Europe/Amsterdam",
"Europe/Andorra",
"Europe/Belgrade",
"Europe/Berlin",
"Europe/Bratislava",
"Europe/Brussels",
"Europe/Budapest",
"Europe/Busingen",
"Europe/Copenhagen",
"Europe/Gibraltar",
"Europe/Ljubljana",
"Europe/Luxembourg",
"Europe/Madrid",
"Europe/Malta",
"Europe/Monaco",
"Europe/Oslo",
"Europe/Paris",
"Europe/Podgorica",
"Europe/Prague",
"Europe/Rome",
"Europe/San_Marino",
"Europe/Sarajevo",
"Europe/Skopje",
"Europe/Stockholm",
"Europe/Tirane",
"Europe/Vaduz",
"Europe/Vatican",
"Europe/Vienna",
"Europe/Warsaw",
"Europe/Zagreb",
"Europe/Zurich",
"Poland",
"NZ-CHAT",
"Pacific/Chatham",
"Asia/Choibalsan",
"Pacific/Chuuk",
"Pacific/Truk",
"Pacific/Yap",
"Pacific/Rarotonga",
"America/Santiago",
"Antarctica/Palmer",
"Chile/Continental",
"America/Bogota",
"America/Bahia_Banderas",
"America/Belize",
"America/Chicago",
"America/Costa_Rica",
"America/El_Salvador",
"America/Guatemala",
"America/Havana",
"America/Indiana/Knox",
"America/Indiana/Tell_City",
"America/Knox_IN",
"America/Managua",
"America/Matamoros",
"America/Menominee",
"America/Merida",
"America/Mexico_City",
"America/Monterrey",
"America/North_Dakota/Beulah",
"America/North_Dakota/Center",
"America/North_Dakota/New_Salem",
"America/Rainy_River",
"America/Rankin_Inlet",
"America/Regina",
"America/Resolute",
"America/Swift_Current",
"America/Tegucigalpa",
"America/Winnipeg",
"Asia/Chongqing",
"Asia/Chungking",
"Asia/Harbin",
"Asia/Macao",
"Asia/Macau",
"Asia/Shanghai",
"Asia/Taipei",
"CST6CDT",
"Canada/Central",
"Canada/East-Saskatchewan",
"Canada/Saskatchewan",
"Cuba",
"Mexico/General",
"PRC",
"ROC",
"US/Central",
"US/Indiana-Starke",
"Atlantic/Cape_Verde",
"Indian/Christmas",
"Pacific/Guam",
"Pacific/Saipan",
"Antarctica/Davis",
"Antarctica/DumontDUrville",
"Chile/EasterIsland",
"Pacific/Easter",
"Africa/Asmara",
"Africa/Asmera",
"Africa/Dar_es_Salaam",
"Africa/Djibouti",
"Africa/Juba",
"Africa/Kampala",
"Africa/Khartoum",
"Africa/Mogadishu",
"Africa/Nairobi",
"Indian/Antananarivo",
"Indian/Comoro",
"Indian/Mayotte",
"America/Guayaquil",
"Africa/Cairo",
"Africa/Tripoli",
"Asia/Amman",
"Asia/Beirut",
"Asia/Damascus",
"Asia/Gaza",
"Asia/Hebron",
"Asia/Istanbul",
"Asia/Nicosia",
"EET",
"Egypt",
"Europe/Athens",
"Europe/Bucharest",
"Europe/Chisinau",
"Europe/Helsinki",
"Europe/Istanbul",
"Europe/Kaliningrad",
"Europe/Kiev",
"Europe/Mariehamn",
"Europe/Nicosia",
"Europe/Riga",
"Europe/Sofia",
"Europe/Tallinn",
"Europe/Tiraspol",
"Europe/Uzhgorod",
"Europe/Vilnius",
"Europe/Zaporozhye",
"Libya",
"Turkey",
"America/Scoresbysund",
"America/Atikokan",
"America/Cancun",
"America/Cayman",
"America/Coral_Harbour",
"America/Detroit",
"America/Fort_Wayne",
"America/Indiana/Indianapolis",
"America/Indiana/Marengo",
"America/Indiana/Petersburg",
"America/Indiana/Vevay",
"America/Indiana/Vincennes",
"America/Indiana/Winamac",
"America/Indianapolis",
"America/Iqaluit",
"America/Jamaica",
"America/Kentucky/Louisville",
"America/Kentucky/Monticello",
"America/Louisville",
"America/Montreal",
"America/Nassau",
"America/New_York",
"America/Nipigon",
"America/Panama",
"America/Pangnirtung",
"America/Port-au-Prince",
"America/Thunder_Bay",
"America/Toronto",
"Canada/Eastern",
"EST",
"EST5EDT",
"Jamaica",
"US/East-Indiana",
"US/Eastern",
"US/Michigan",
"Pacific/Fiji",
"Atlantic/Stanley",
"America/Noronha",
"Brazil/DeNoronha",
"Pacific/Galapagos",
"Pacific/Gambier",
"Asia/Tbilisi",
"America/Cayenne",
"Pacific/Tarawa",
"Africa/Abidjan",
"Africa/Accra",
"Africa/Bamako",
"Africa/Banjul",
"Africa/Bissau",
"Africa/Conakry",
"Africa/Dakar",
"Africa/Freetown",
"Africa/Lome",
"Africa/Monrovia",
"Africa/Nouakchott",
"Africa/Ouagadougou",
"Africa/Sao_Tome",
"Africa/Timbuktu",
"America/Danmarkshavn",
"Atlantic/Reykjavik",
"Atlantic/St_Helena",
"Eire",
"Etc/GMT",
"Etc/GMT+0",
"Etc/GMT-0",
"Etc/GMT0",
"Etc/Greenwich",
"Europe/Belfast",
"Europe/Dublin",
"Europe/Guernsey",
"Europe/Isle_of_Man",
"Europe/Jersey",
"Europe/London",
"GB",
"GB-Eire",
"GMT",
"GMT+0",
"GMT-0",
"GMT0",
"Greenwich",
"Iceland",
"Etc/GMT+1",
"Etc/GMT+10",
"Etc/GMT+11",
"Etc/GMT+12",
"Etc/GMT+2",
"Etc/GMT+3",
"Etc/GMT+4",
"Etc/GMT+5",
"Etc/GMT+6",
"Etc/GMT+7",
"Etc/GMT+8",
"Etc/GMT+9",
"Etc/GMT-1",
"Etc/GMT-10",
"Etc/GMT-11",
"Etc/GMT-12",
"Etc/GMT-13",
"Etc/GMT-14",
"Etc/GMT-2",
"Etc/GMT-3",
"Etc/GMT-4",
"Etc/GMT-5",
"Etc/GMT-6",
"Etc/GMT-7",
"Etc/GMT-8",
"Etc/GMT-9",
"Asia/Dubai",
"Asia/Muscat",
"Atlantic/South_Georgia",
"America/Guyana",
"Asia/Hong_Kong",
"Hongkong",
"Asia/Hovd",
"America/Adak",
"America/Atka",
"HST",
"Pacific/Honolulu",
"Pacific/Johnston",
"US/Aleutian",
"US/Hawaii",
"Asia/Bangkok",
"Asia/Ho_Chi_Minh",
"Asia/Phnom_Penh",
"Asia/Saigon",
"Asia/Vientiane",
"Indian/Chagos",
"Asia/Chita",
"Asia/Irkutsk",
"Asia/Tehran",
"Iran",
"Asia/Calcutta",
"Asia/Colombo",
"Asia/Jerusalem",
"Asia/Kolkata",
"Asia/Tel_Aviv",
"Israel",
"Asia/Tokyo",
"Japan",
"Asia/Bishkek",
"Pacific/Kosrae",
"Asia/Krasnoyarsk",
"Asia/Novokuznetsk",
"Asia/Pyongyang",
"Asia/Seoul",
"ROK",
"Australia/LHI",
"Australia/Lord_Howe",
"Pacific/Kiritimati",
"Asia/Magadan",
"Pacific/Marquesas",
"Antarctica/Mawson",
"MET",
"Kwajalein",
"Pacific/Kwajalein",
"Pacific/Majuro",
"Antarctica/Macquarie",
"Asia/Rangoon",
"Europe/Minsk",
"Europe/Moscow",
"Europe/Simferopol",
"Europe/Volgograd",
"W-SU",
"America/Boise",
"America/Cambridge_Bay",
"America/Chihuahua",
"America/Creston",
"America/Dawson_Creek",
"America/Denver",
"America/Edmonton",
"America/Fort_Nelson",
"America/Hermosillo",
"America/Inuvik",
"America/Mazatlan",
"America/Ojinaga",
"America/Phoenix",
"America/Shiprock",
"America/Yellowknife",
"Canada/Mountain",
"MST",
"MST7MDT",
"Mexico/BajaSur",
"Navajo",
"US/Arizona",
"US/Mountain",
"Indian/Mauritius",
"Indian/Maldives",
"Asia/Kuala_Lumpur",
"Asia/Kuching",
"Pacific/Noumea",
"Pacific/Norfolk",
"Asia/Novosibirsk",
"Asia/Kathmandu",
"Asia/Katmandu",
"Pacific/Nauru",
"America/St_Johns",
"Canada/Newfoundland",
"Pacific/Niue",
"Antarctica/McMurdo",
"Antarctica/South_Pole",
"NZ",
"Pacific/Auckland",
"Asia/Omsk",
"Asia/Oral",
"America/Lima",
"Asia/Kamchatka",
"Pacific/Port_Moresby",
"Pacific/Enderbury",
"Asia/Manila",
"Asia/Karachi",
"America/Miquelon",
"Pacific/Pohnpei",
"Pacific/Ponape",
"America/Dawson",
"America/Ensenada",
"America/Los_Angeles",
"America/Metlakatla",
"America/Santa_Isabel",
"America/Tijuana",
"America/Vancouver",
"America/Whitehorse",
"Canada/Pacific",
"Canada/Yukon",
"Mexico/BajaNorte",
"PST8PDT",
"Pacific/Pitcairn",
"US/Pacific",
"US/Pacific-New",
"Pacific/Palau",
"America/Asuncion",
"Asia/Qyzylorda",
"Indian/Reunion",
"Antarctica/Rothera",
"Asia/Sakhalin",
"Europe/Samara",
"Africa/Johannesburg",
"Africa/Maseru",
"Africa/Mbabane",
"Pacific/Guadalcanal",
"Indian/Mahe",
"Asia/Singapore",
"Singapore",
"Asia/Srednekolymsk",
"America/Paramaribo",
"Pacific/Midway",
"Pacific/Pago_Pago",
"Pacific/Samoa",
"US/Samoa",
"Antarctica/Syowa",
"Pacific/Tahiti",
"Indian/Kerguelen",
"Asia/Dushanbe",
"Pacific/Fakaofo",
"Asia/Dili",
"Asia/Ashgabat",
"Asia/Ashkhabad",
"Pacific/Tongatapu",
"Pacific/Funafuti",
"Etc/UCT",
"UCT",
"Asia/Ulaanbaatar",
"Asia/Ulan_Bator",
"Antarctica/Troll",
"Etc/UTC",
"Etc/Universal",
"Etc/Zulu",
"UTC",
"Universal",
"Zulu",
"America/Montevideo",
"Asia/Samarkand",
"Asia/Tashkent",
"America/Caracas",
"Asia/Ust-Nera",
"Asia/Vladivostok",
"Antarctica/Vostok",
"Pacific/Efate",
"Pacific/Wake",
"Africa/Windhoek",
"Africa/Bangui",
"Africa/Brazzaville",
"Africa/Douala",
"Africa/Kinshasa",
"Africa/Lagos",
"Africa/Libreville",
"Africa/Luanda",
"Africa/Malabo",
"Africa/Ndjamena",
"Africa/Niamey",
"Africa/Porto-Novo",
"Africa/Casablanca",
"Africa/El_Aaiun",
"Atlantic/Canary",
"Atlantic/Faeroe",
"Atlantic/Faroe",
"Atlantic/Madeira",
"Europe/Lisbon",
"Portugal",
"WET",
"Pacific/Wallis",
"America/Godthab",
"Asia/Jakarta",
"Asia/Pontianak",
"Asia/Jayapura",
"Asia/Makassar",
"Asia/Ujung_Pandang",
"Pacific/Apia",
"Asia/Kashgar",
"Asia/Urumqi",
"Asia/Khandyga",
"Asia/Yakutsk",
"Asia/Yekaterinburg",
}
// These example values must use the reference time "Mon Jan 2 15:04:05 MST 2006"
// as described at https://gobyexample.com/time-formatting-parsing
const (
BaseDateFormat = "2006-01-02"
TimeFormat = "15:04:05"
MonthFormat = "January"
YearFormat = "2006"
DayFormat = "Monday"
DayOfMonthFormat = "_2"
TimePeriodFormat = "PM"
)
// A DateTimer contains random Time generators, returning time string in certain particular format
type DateTimer interface {
UnixTime(ctx context.Context, v reflect.Value) (interface{}, error)
Date(ctx context.Context, v reflect.Value) (interface{}, error)
Time(ctx context.Context, v reflect.Value) (interface{}, error)
MonthName(ctx context.Context, v reflect.Value) (interface{}, error)
Year(ctx context.Context, v reflect.Value) (interface{}, error)
DayOfWeek(ctx context.Context, v reflect.Value) (interface{}, error)
DayOfMonth(ctx context.Context, v reflect.Value) (interface{}, error)
Timestamp(ctx context.Context, v reflect.Value) (interface{}, error)
Century(ctx context.Context, v reflect.Value) (interface{}, error)
TimeZone(ctx context.Context, v reflect.Value) (interface{}, error)
TimePeriod(ctx context.Context, v reflect.Value) (interface{}, error)
}
var date DateTimer
// GetDateTimer returns a new DateTimer interface of DateTime
func GetDateTimer() DateTimer {
mu.Lock()
defer mu.Unlock()
if date == nil {
date = &DateTime{}
}
return date
}
// SetDateTimer sets custom date time
func SetDateTimer(d DateTimer) {
date = d
}
// DateTime struct
type DateTime struct {
}
func (d DateTime) unixtime() int64 {
return RandomUnixTime()
}
// UnixTime get unix time
func (d DateTime) UnixTime(ctx context.Context, v reflect.Value) (interface{}, error) {
kind := v.Kind()
var val int64
if kind == reflect.Int64 {
val = d.unixtime()
} else {
val = 0
}
return val, nil
}
// UnixTime get unix time randomly
func UnixTime() int64 {
datetime := DateTime{}
return datetime.unixtime()
}
func (d DateTime) date() string {
return time.Unix(RandomUnixTime(), 0).Format(BaseDateFormat)
}
// Date formats DateTime using example BaseDateFormat const
func (d DateTime) Date(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.date(), nil
}
// Date get fake date in string randomly
func Date() string {
datetime := DateTime{}
return datetime.date()
}
func (d DateTime) time() string {
return time.Unix(RandomUnixTime(), 0).Format(TimeFormat)
}
// Time formats DateTime using example Time const
func (d DateTime) Time(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.time(), nil
}
// TimeString get time randomly in string format
func TimeString() string {
datetime := DateTime{}
return datetime.time()
}
func (d DateTime) monthName() string {
return time.Unix(RandomUnixTime(), 0).Format(MonthFormat)
}
// MonthName formats DateTime using example Month const
func (d DateTime) MonthName(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.monthName(), nil
}
// MonthName get month name randomly in string format
func MonthName() string {
datetime := DateTime{}
return datetime.monthName()
}
func (d DateTime) year() string {
return time.Unix(RandomUnixTime(), 0).Format(YearFormat)
}
// Year formats DateTime using example Year const
func (d DateTime) Year(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.year(), nil
}
// YearString get year randomly in string format
func YearString() string {
datetime := DateTime{}
return datetime.year()
}
func (d DateTime) dayOfWeek() string {
return time.Unix(RandomUnixTime(), 0).Format(DayFormat)
}
// DayOfWeek formats DateTime using example Day const
func (d DateTime) DayOfWeek(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.dayOfWeek(), nil
}
// DayOfWeek get day of week randomly in string format
func DayOfWeek() string {
datetime := DateTime{}
return datetime.dayOfWeek()
}
func (d DateTime) dayOfMonth() string {
return time.Unix(RandomUnixTime(), 0).Format(DayOfMonthFormat)
}
// DayOfMonth formats DateTime using example DayOfMonth const
func (d DateTime) DayOfMonth(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.dayOfMonth(), nil
}
// DayOfMonth get month randomly in string format
func DayOfMonth() string {
datetime := DateTime{}
return datetime.dayOfMonth()
}
func (d DateTime) timestamp() string {
return time.Unix(RandomUnixTime(), 0).Format(fmt.Sprintf("%s %s", BaseDateFormat, TimeFormat))
}
// Timestamp formats DateTime using example Timestamp const
func (d DateTime) Timestamp(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.timestamp(), nil
}
// Timestamp get timestamp randomly in string format: 2006-01-02 15:04:05
func Timestamp() string {
datetime := DateTime{}
return datetime.timestamp()
}
func (d DateTime) century() string {
return RandomElementFromSliceString(century)
}
// Century returns a random century
func (d DateTime) Century(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.century(), nil
}
// Century get century randomly in string
func Century() string {
datetime := DateTime{}
return datetime.century()
}
func (d DateTime) timezone() string {
return RandomElementFromSliceString(timezones)
}
// TimeZone returns a random timezone
func (d DateTime) TimeZone(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.timezone(), nil
}
// Timezone get timezone randomly in string
func Timezone() string {
datetime := DateTime{}
return datetime.timezone()
}
func (d DateTime) period() string {
return time.Unix(RandomUnixTime(), 0).Format(TimePeriodFormat)
}
// TimePeriod formats DateTime using example TimePeriod const
func (d DateTime) TimePeriod(ctx context.Context, v reflect.Value) (interface{}, error) {
return d.period(), nil
}
// Timeperiod get timeperiod randomly in string (AM/PM)
func Timeperiod() string {
datetime := DateTime{}
return datetime.period()
}
// RandomUnixTime is a helper function returning random Unix time
func RandomUnixTime() int64 {
return rand.Int63n(time.Now().Unix())
}