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// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
// Package gtime provides functionality for measuring and displaying time.
//
// This package should keep much less dependencies with other packages.
package gtime
import (
"errors"
"github.com/gogf/gf/errors/gerror"
"regexp"
"strconv"
"strings"
"time"
"github.com/gogf/gf/text/gregex"
)
const (
// Short writes for common usage durations.
D = 24 * time.Hour
H = time.Hour
M = time.Minute
S = time.Second
MS = time.Millisecond
US = time.Microsecond
NS = time.Nanosecond
// Regular expression1(datetime separator supports '-', '/', '.').
// Eg:
// "2017-12-14 04:51:34 +0805 LMT",
// "2017-12-14 04:51:34 +0805 LMT",
// "2006-01-02T15:04:05Z07:00",
// "2014-01-17T01:19:15+08:00",
// "2018-02-09T20:46:17.897Z",
// "2018-02-09 20:46:17.897",
// "2018-02-09T20:46:17Z",
// "2018-02-09 20:46:17",
// "2018/10/31 - 16:38:46"
// "2018-02-09",
// "2018.02.09",
TIME_REAGEX_PATTERN1 = `(\d{4}[-/\.]\d{2}[-/\.]\d{2})[:\sT-]*(\d{0,2}:{0,1}\d{0,2}:{0,1}\d{0,2}){0,1}\.{0,1}(\d{0,9})([\sZ]{0,1})([\+-]{0,1})([:\d]*)`
// Regular expression2(datetime separator supports '-', '/', '.').
// Eg:
// 01-Nov-2018 11:50:28
// 01/Nov/2018 11:50:28
// 01.Nov.2018 11:50:28
// 01.Nov.2018:11:50:28
TIME_REAGEX_PATTERN2 = `(\d{1,2}[-/\.][A-Za-z]{3,}[-/\.]\d{4})[:\sT-]*(\d{0,2}:{0,1}\d{0,2}:{0,1}\d{0,2}){0,1}\.{0,1}(\d{0,9})([\sZ]{0,1})([\+-]{0,1})([:\d]*)`
)
var (
// It's more high performance using regular expression
// than time.ParseInLocation to parse the datetime string.
timeRegex1, _ = regexp.Compile(TIME_REAGEX_PATTERN1)
timeRegex2, _ = regexp.Compile(TIME_REAGEX_PATTERN2)
// Month words to arabic numerals mapping.
monthMap = map[string]int{
"jan": 1,
"feb": 2,
"mar": 3,
"apr": 4,
"may": 5,
"jun": 6,
"jul": 7,
"aug": 8,
"sep": 9,
"sept": 9,
"oct": 10,
"nov": 11,
"dec": 12,
"january": 1,
"february": 2,
"march": 3,
"april": 4,
"june": 6,
"july": 7,
"august": 8,
"september": 9,
"october": 10,
"november": 11,
"december": 12,
}
)
// SetTimeZone sets the time zone for current whole process.
// The parameter <zone> is an area string specifying corresponding time zone,
// eg: Asia/Shanghai.
//
// Note that the time zone database needed by LoadLocation may not be
// present on all systems, especially non-Unix systems.
// LoadLocation looks in the directory or uncompressed zip file
// named by the ZONEINFO environment variable, if any, then looks in
// known installation locations on Unix systems,
// and finally looks in $GOROOT/lib/time/zoneinfo.zip.
func SetTimeZone(zone string) error {
location, err := time.LoadLocation(zone)
if err == nil {
time.Local = location
}
return err
}
// Timestamp retrieves and returns the timestamp in seconds.
func Timestamp() int64 {
return Now().Timestamp()
}
// TimestampMilli retrieves and returns the timestamp in milliseconds.
func TimestampMilli() int64 {
return Now().TimestampMilli()
}
// TimestampMicro retrieves and returns the timestamp in microseconds.
func TimestampMicro() int64 {
return Now().TimestampMicro()
}
// TimestampNano retrieves and returns the timestamp in nanoseconds.
func TimestampNano() int64 {
return Now().TimestampNano()
}
// TimestampStr is a convenience method which retrieves and returns
// the timestamp in seconds as string.
func TimestampStr() string {
return Now().TimestampStr()
}
// TimestampMilliStr is a convenience method which retrieves and returns
// the timestamp in milliseconds as string.
func TimestampMilliStr() string {
return Now().TimestampMilliStr()
}
// TimestampMicroStr is a convenience method which retrieves and returns
// the timestamp in microseconds as string.
func TimestampMicroStr() string {
return Now().TimestampMicroStr()
}
// TimestampNanoStr is a convenience method which retrieves and returns
// the timestamp in nanoseconds as string.
func TimestampNanoStr() string {
return Now().TimestampNanoStr()
}
// Second returns the timestamp in seconds.
// Deprecated, use Timestamp instead.
func Second() int64 {
return Timestamp()
}
// Millisecond returns the timestamp in milliseconds.
// Deprecated, use TimestampMilli instead.
func Millisecond() int64 {
return TimestampMilli()
}
// Microsecond returns the timestamp in microseconds.
// Deprecated, use TimestampMicro instead.
func Microsecond() int64 {
return TimestampMicro()
}
// Nanosecond returns the timestamp in nanoseconds.
// Deprecated, use TimestampNano instead.
func Nanosecond() int64 {
return TimestampNano()
}
// Date returns current date in string like "2006-01-02".
func Date() string {
return time.Now().Format("2006-01-02")
}
// Datetime returns current datetime in string like "2006-01-02 15:04:05".
func Datetime() string {
return time.Now().Format("2006-01-02 15:04:05")
}
// ISO8601 returns current datetime in ISO8601 format like "2006-01-02T15:04:05-07:00".
func ISO8601() string {
return time.Now().Format("2006-01-02T15:04:05-07:00")
}
// ISO8601 returns current datetime in RFC822 format like "Mon, 02 Jan 06 15:04 MST".
func RFC822() string {
return time.Now().Format("Mon, 02 Jan 06 15:04 MST")
}
// parseDateStr parses the string to year, month and day numbers.
func parseDateStr(s string) (year, month, day int) {
array := strings.Split(s, "-")
if len(array) < 3 {
array = strings.Split(s, "/")
}
if len(array) < 3 {
array = strings.Split(s, ".")
}
// Parsing failed.
if len(array) < 3 {
return
}
// Checking the year in head or tail.
if isNumeric(array[1]) {
year, _ = strconv.Atoi(array[0])
month, _ = strconv.Atoi(array[1])
day, _ = strconv.Atoi(array[2])
} else {
if v, ok := monthMap[strings.ToLower(array[1])]; ok {
month = v
} else {
return
}
year, _ = strconv.Atoi(array[2])
day, _ = strconv.Atoi(array[0])
}
return
}
// StrToTime converts string to *Time object.
// The parameter <format> is unnecessary, which specifies the format for converting like "Y-m-d H:i:s".
// If <format> is given, it acts as same as function StrToTimeFormat.
// If <format> is not given, it converts string as a "standard" datetime string.
// Note that, it fails and returns error if there's no date string in <str>.
func StrToTime(str string, format ...string) (*Time, error) {
if len(format) > 0 {
return StrToTimeFormat(str, format[0])
}
var (
year, month, day int
hour, min, sec, nsec int
match []string
local = time.Local
)
if match = timeRegex1.FindStringSubmatch(str); len(match) > 0 && match[1] != "" {
for k, v := range match {
match[k] = strings.TrimSpace(v)
}
year, month, day = parseDateStr(match[1])
} else if match = timeRegex2.FindStringSubmatch(str); len(match) > 0 && match[1] != "" {
for k, v := range match {
match[k] = strings.TrimSpace(v)
}
year, month, day = parseDateStr(match[1])
} else {
return nil, errors.New("unsupported time format")
}
// Time
if len(match[2]) > 0 {
s := strings.Replace(match[2], ":", "", -1)
if len(s) < 6 {
s += strings.Repeat("0", 6-len(s))
}
hour, _ = strconv.Atoi(s[0:2])
min, _ = strconv.Atoi(s[2:4])
sec, _ = strconv.Atoi(s[4:6])
}
// Nanoseconds, check and perform bit filling
if len(match[3]) > 0 {
nsec, _ = strconv.Atoi(match[3])
for i := 0; i < 9-len(match[3]); i++ {
nsec *= 10
}
}
// If there's zone information in the string,
// it then performs time zone conversion, which converts the time zone to UTC.
if match[4] != "" && match[6] == "" {
match[6] = "000000"
}
// If there's offset in the string, it then firstly processes the offset.
if match[6] != "" {
zone := strings.Replace(match[6], ":", "", -1)
zone = strings.TrimLeft(zone, "+-")
if len(zone) <= 6 {
zone += strings.Repeat("0", 6-len(zone))
h, _ := strconv.Atoi(zone[0:2])
m, _ := strconv.Atoi(zone[2:4])
s, _ := strconv.Atoi(zone[4:6])
if h > 24 || m > 59 || s > 59 {
return nil, gerror.Newf("invalid zone string: %s", match[6])
}
// Comparing the given time zone whether equals to current tine zone,
// it converts it to UTC if they does not.
_, localOffset := time.Now().Zone()
// Comparing in seconds.
if (h*3600 + m*60 + s) != localOffset {
local = time.UTC
// UTC conversion.
operation := match[5]
if operation != "+" && operation != "-" {
operation = "-"
}
switch operation {
case "+":
if h > 0 {
hour -= h
}
if m > 0 {
min -= m
}
if s > 0 {
sec -= s
}
case "-":
if h > 0 {
hour += h
89F8
}
if m > 0 {
min += m
}
if s > 0 {
sec += s
}
}
}
}
}
if year <= 0 || month <= 0 || day <= 0 || hour < 0 || min < 0 || sec < 0 || nsec < 0 {
return nil, errors.New("invalid time string:" + str)
}
// It finally converts all time to UTC time zone.
return NewFromTime(time.Date(year, time.Month(month), day, hour, min, sec, nsec, local)), nil
}
// ConvertZone converts time in string <strTime> from <fromZone> to <toZone>.
// The parameter <fromZone> is unnecessary, it is current time zone in default.
func ConvertZone(strTime string, toZone string, fromZone ...string) (*Time, error) {
t, err := StrToTime(strTime)
if err != nil {
return nil, err
}
if len(fromZone) > 0 {
if l, err := time.LoadLocation(fromZone[0]); err != nil {
return nil, err
} else {
t.Time = time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Time.Second(), t.Time.Nanosecond(), l)
}
}
if l, err := time.LoadLocation(toZone); err != nil {
return nil, err
} else {
return t.ToLocation(l), nil
}
}
// StrToTimeFormat parses string <str> to *Time object with given format <format>.
// The parameter <format> is like "Y-m-d H:i:s".
func StrToTimeFormat(str string, format string) (*Time, error) {
return StrToTimeLayout(str, formatToStdLayout(format))
}
// StrToTimeLayout parses string <str> to *Time object with given format <layout>.
// The parameter <layout> is in stdlib format like "2006-01-02 15:04:05".
func StrToTimeLayout(str string, layout string) (*Time, error) {
if t, err := time.ParseInLocation(layout, str, time.Local); err == nil {
return NewFromTime(t), nil
} else {
return nil, err
}
}
// ParseTimeFromContent retrieves time information for content string, it then parses and returns it as *Time object.
// It returns the first time information if there're more than one time string in the content.
// It only retrieves and parses the time information with given <format> if it's passed.
func ParseTimeFromContent(content string, format ...string) *Time {
if len(format) > 0 {
if match, err := gregex.MatchString(formatToRegexPattern(format[0]), content); err == nil && len(match) > 0 {
return NewFromStrFormat(match[0], format[0])
}
} else {
if match := timeRegex1.FindStringSubmatch(content); len(match) >= 1 {
return NewFromStr(strings.Trim(match[0], "./_- \n\r"))
} else if match := timeRegex2.FindStringSubmatch(content); len(match) >= 1 {
return NewFromStr(strings.Trim(match[0], "./_- \n\r"))
}
}
return nil
}
// FuncCost calculates the cost time of function <f> in nanoseconds.
func FuncCost(f func()) int64 {
t := TimestampNano()
f()
return TimestampNano() - t
}
// isNumeric checks whether given <s> is a number.
func isNumeric(s string) bool {
length := len(s)
if length == 0 {
return false
}
for i := 0; i < len(s); i++ {
if s[i] < byte('0') || s[i] > byte('9') {
return false
}
}
return true
}