mirror of
https://github.com/araddon/dateparse.git
synced 2024-11-10 11:51:54 +08:00
852 lines
26 KiB
Go
852 lines
26 KiB
Go
package dateparse
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
"time"
|
|
"unicode"
|
|
)
|
|
|
|
type dateState int
|
|
|
|
const (
|
|
stateStart dateState = iota
|
|
stateDigit
|
|
stateDigitDash
|
|
stateDigitDashAlpha
|
|
stateDigitDashWs
|
|
stateDigitDashWsWs
|
|
stateDigitDashWsWsAMPMMaybe
|
|
stateDigitDashWsWsOffset
|
|
stateDigitDashWsWsOffsetAlpha
|
|
stateDigitDashWsWsOffsetColonAlpha
|
|
stateDigitDashWsWsOffsetColon
|
|
stateDigitDashWsOffset
|
|
stateDigitDashWsWsAlpha
|
|
stateDigitDashWsPeriod
|
|
stateDigitDashWsPeriodAlpha
|
|
stateDigitDashWsPeriodOffset
|
|
stateDigitDashWsPeriodOffsetAlpha
|
|
stateDigitDashT
|
|
stateDigitDashTZ
|
|
stateDigitDashTZDigit
|
|
stateDigitDashTOffset
|
|
stateDigitDashTOffsetColon
|
|
stateDigitSlash
|
|
stateDigitSlashWS
|
|
stateDigitSlashWSColon
|
|
stateDigitSlashWSColonAMPM
|
|
stateDigitSlashWSColonColon
|
|
stateDigitSlashWSColonColonAMPM
|
|
stateDigitAlpha
|
|
stateAlpha
|
|
stateAlphaWS
|
|
stateAlphaWSDigitComma
|
|
stateAlphaWSAlpha
|
|
stateAlphaWSAlphaColon
|
|
stateAlphaWSAlphaColonOffset
|
|
stateAlphaWSAlphaColonAlpha
|
|
stateAlphaWSAlphaColonAlphaOffset
|
|
stateAlphaWSAlphaColonAlphaOffsetAlpha
|
|
stateWeekdayComma
|
|
stateWeekdayCommaOffset
|
|
stateWeekdayAbbrevComma
|
|
stateWeekdayAbbrevCommaOffset
|
|
stateWeekdayAbbrevCommaOffsetZone
|
|
)
|
|
|
|
var (
|
|
shortDates = []string{"01/02/2006", "1/2/2006", "06/01/02", "01/02/06", "1/2/06"}
|
|
)
|
|
|
|
// ParseAny parse an unknown date format, detect the layout, parse.
|
|
// Normal parse. Equivalent Timezone rules as time.Parse()
|
|
func ParseAny(datestr string) (time.Time, error) {
|
|
return parseTime(datestr, nil)
|
|
}
|
|
|
|
// ParseIn with Location, equivalent to time.ParseInLocation() timezone/offset
|
|
// rules. Using location arg, if timezone/offset info exists in the
|
|
// datestring, it uses the given location rules for any zone interpretation.
|
|
// That is, MST means one thing when using America/Denver and something else
|
|
// in other locations.
|
|
func ParseIn(datestr string, loc *time.Location) (time.Time, error) {
|
|
return parseTime(datestr, loc)
|
|
}
|
|
|
|
// ParseLocal Given an unknown date format, detect the layout,
|
|
// using time.Local, parse.
|
|
//
|
|
// Set Location to time.Local. Same as ParseIn Location but lazily uses
|
|
// the global time.Local variable for Location argument.
|
|
//
|
|
// denverLoc, _ := time.LoadLocation("America/Denver")
|
|
// time.Local = denverLoc
|
|
//
|
|
// t, err := dateparse.ParseLocal("3/1/2014")
|
|
//
|
|
// Equivalent to:
|
|
//
|
|
// t, err := dateparse.ParseIn("3/1/2014", denverLoc)
|
|
//
|
|
func ParseLocal(datestr string) (time.Time, error) {
|
|
return parseTime(datestr, time.Local)
|
|
}
|
|
|
|
// MustParse parse a date, and panic if it can't be parsed. Used for testing.
|
|
// Not recommended for most use-cases.
|
|
func MustParse(datestr string) time.Time {
|
|
t, err := parseTime(datestr, nil)
|
|
if err != nil {
|
|
panic(err.Error())
|
|
}
|
|
return t
|
|
}
|
|
|
|
func parse(layout, datestr string, loc *time.Location) (time.Time, error) {
|
|
if loc == nil {
|
|
return time.Parse(layout, datestr)
|
|
}
|
|
return time.ParseInLocation(layout, datestr, loc)
|
|
}
|
|
|
|
func parseTime(datestr string, loc *time.Location) (time.Time, error) {
|
|
state := stateStart
|
|
|
|
firstSlash := 0
|
|
|
|
// General strategy is to read rune by rune through the date looking for
|
|
// certain hints of what type of date we are dealing with.
|
|
// Hopefully we only need to read about 5 or 6 bytes before
|
|
// we figure it out and then attempt a parse
|
|
iterRunes:
|
|
for i := 0; i < len(datestr); i++ {
|
|
r := rune(datestr[i])
|
|
// r, bytesConsumed := utf8.DecodeRuneInString(datestr[ri:])
|
|
// if bytesConsumed > 1 {
|
|
// ri += (bytesConsumed - 1)
|
|
// }
|
|
|
|
switch state {
|
|
case stateStart:
|
|
if unicode.IsDigit(r) {
|
|
state = stateDigit
|
|
} else if unicode.IsLetter(r) {
|
|
state = stateAlpha
|
|
}
|
|
case stateDigit: // starts digits
|
|
if unicode.IsDigit(r) {
|
|
continue
|
|
} else if unicode.IsLetter(r) {
|
|
state = stateDigitAlpha
|
|
continue
|
|
}
|
|
switch r {
|
|
case '-', '\u2212':
|
|
state = stateDigitDash
|
|
case '/':
|
|
state = stateDigitSlash
|
|
firstSlash = i
|
|
}
|
|
case stateDigitDash: // starts digit then dash 02-
|
|
// 2006-01-02T15:04:05Z07:00
|
|
// 2017-06-25T17:46:57.45706582-07:00
|
|
// 2006-01-02T15:04:05.999999999Z07:00
|
|
// 2006-01-02T15:04:05+0000
|
|
// 2012-08-03 18:31:59.257000000
|
|
// 2014-04-26 17:24:37.3186369
|
|
// 2017-01-27 00:07:31.945167
|
|
// 2016-03-14 00:00:00.000
|
|
// 2014-05-11 08:20:13,787
|
|
// 2017-07-19 03:21:51+00:00
|
|
// 2006-01-02
|
|
// 2013-04-01 22:43:22
|
|
// 2014-04-26 05:24:37 PM
|
|
// 2013-Feb-03
|
|
switch {
|
|
case r == ' ':
|
|
state = stateDigitDashWs
|
|
case r == 'T':
|
|
state = stateDigitDashT
|
|
default:
|
|
if unicode.IsLetter(r) {
|
|
state = stateDigitDashAlpha
|
|
break iterRunes
|
|
}
|
|
}
|
|
case stateDigitDashWs:
|
|
// 2013-04-01 22:43:22
|
|
// 2014-05-11 08:20:13,787
|
|
// stateDigitDashWsWs
|
|
// 2014-04-26 05:24:37 PM
|
|
// 2014-12-16 06:20:00 UTC
|
|
// 2015-02-18 00:12:00 +0000 UTC
|
|
// 2006-01-02 15:04:05 -0700
|
|
// 2006-01-02 15:04:05 -07:00
|
|
// stateDigitDashWsOffset
|
|
// 2017-07-19 03:21:51+00:00
|
|
// stateDigitDashWsPeriod
|
|
// 2014-04-26 17:24:37.3186369
|
|
// 2017-01-27 00:07:31.945167
|
|
// 2012-08-03 18:31:59.257000000
|
|
// 2016-03-14 00:00:00.000
|
|
// stateDigitDashWsPeriodOffset
|
|
// 2017-01-27 00:07:31.945167 +0000
|
|
// 2016-03-14 00:00:00.000 +0000
|
|
// stateDigitDashWsPeriodOffsetAlpha
|
|
// 2017-01-27 00:07:31.945167 +0000 UTC
|
|
// 2016-03-14 00:00:00.000 +0000 UTC
|
|
// stateDigitDashWsPeriodAlpha
|
|
// 2014-12-16 06:20:00.000 UTC
|
|
switch r {
|
|
case ',':
|
|
if len(datestr) == len("2014-05-11 08:20:13,787") {
|
|
// go doesn't seem to parse this one natively? or did i miss it?
|
|
t, err := parse("2006-01-02 03:04:05", datestr[:i], loc)
|
|
if err == nil {
|
|
ms, err := strconv.Atoi(datestr[i+1:])
|
|
if err == nil {
|
|
return time.Unix(0, t.UnixNano()+int64(ms)*1e6), nil
|
|
}
|
|
}
|
|
return t, err
|
|
}
|
|
case '-', '+':
|
|
state = stateDigitDashWsOffset
|
|
case '.':
|
|
state = stateDigitDashWsPeriod
|
|
case ' ':
|
|
state = stateDigitDashWsWs
|
|
}
|
|
|
|
case stateDigitDashWsWs:
|
|
// stateDigitDashWsWsAlpha
|
|
// 2014-12-16 06:20:00 UTC
|
|
// stateDigitDashWsWsAMPMMaybe
|
|
// 2014-04-26 05:24:37 PM
|
|
// stateDigitDashWsWsOffset
|
|
// 2006-01-02 15:04:05 -0700
|
|
// stateDigitDashWsWsOffsetColon
|
|
// 2006-01-02 15:04:05 -07:00
|
|
// stateDigitDashWsWsOffsetColonAlpha
|
|
// 2015-02-18 00:12:00 +00:00 UTC
|
|
// stateDigitDashWsWsOffsetAlpha
|
|
// 2015-02-18 00:12:00 +0000 UTC
|
|
switch r {
|
|
case 'A', 'P':
|
|
state = stateDigitDashWsWsAMPMMaybe
|
|
case '+', '-':
|
|
state = stateDigitDashWsWsOffset
|
|
default:
|
|
if unicode.IsLetter(r) {
|
|
// 2014-12-16 06:20:00 UTC
|
|
state = stateDigitDashWsWsAlpha
|
|
break iterRunes
|
|
}
|
|
}
|
|
|
|
case stateDigitDashWsWsAMPMMaybe:
|
|
if r == 'M' {
|
|
return parse("2006-01-02 03:04:05 PM", datestr, loc)
|
|
}
|
|
state = stateDigitDashWsWsAlpha
|
|
|
|
case stateDigitDashWsWsOffset:
|
|
// stateDigitDashWsWsOffset
|
|
// 2006-01-02 15:04:05 -0700
|
|
// stateDigitDashWsWsOffsetColon
|
|
// 2006-01-02 15:04:05 -07:00
|
|
// stateDigitDashWsWsOffsetColonAlpha
|
|
// 2015-02-18 00:12:00 +00:00 UTC
|
|
// stateDigitDashWsWsOffsetAlpha
|
|
// 2015-02-18 00:12:00 +0000 UTC
|
|
if r == ':' {
|
|
state = stateDigitDashWsWsOffsetColon
|
|
} else if unicode.IsLetter(r) {
|
|
// 2015-02-18 00:12:00 +0000 UTC
|
|
state = stateDigitDashWsWsOffsetAlpha
|
|
break iterRunes
|
|
}
|
|
|
|
case stateDigitDashWsWsOffsetColon:
|
|
// stateDigitDashWsWsOffsetColon
|
|
// 2006-01-02 15:04:05 -07:00
|
|
// stateDigitDashWsWsOffsetColonAlpha
|
|
// 2015-02-18 00:12:00 +00:00 UTC
|
|
if unicode.IsLetter(r) {
|
|
// 2015-02-18 00:12:00 +00:00 UTC
|
|
state = stateDigitDashWsWsOffsetColonAlpha
|
|
break iterRunes
|
|
}
|
|
|
|
case stateDigitDashWsPeriod:
|
|
// 2014-04-26 17:24:37.3186369
|
|
// 2017-01-27 00:07:31.945167
|
|
// 2012-08-03 18:31:59.257000000
|
|
// 2016-03-14 00:00:00.000
|
|
// stateDigitDashWsPeriodOffset
|
|
// 2017-01-27 00:07:31.945167 +0000
|
|
// 2016-03-14 00:00:00.000 +0000
|
|
// stateDigitDashWsPeriodOffsetAlpha
|
|
// 2017-01-27 00:07:31.945167 +0000 UTC
|
|
// 2016-03-14 00:00:00.000 +0000 UTC
|
|
// stateDigitDashWsPeriodAlpha
|
|
// 2014-12-16 06:20:00.000 UTC
|
|
if unicode.IsLetter(r) {
|
|
// 2014-12-16 06:20:00.000 UTC
|
|
state = stateDigitDashWsPeriodAlpha
|
|
break iterRunes
|
|
} else if r == '+' || r == '-' {
|
|
state = stateDigitDashWsPeriodOffset
|
|
}
|
|
case stateDigitDashWsPeriodOffset:
|
|
// 2017-01-27 00:07:31.945167 +0000
|
|
// 2016-03-14 00:00:00.000 +0000
|
|
// stateDigitDashWsPeriodOffsetAlpha
|
|
// 2017-01-27 00:07:31.945167 +0000 UTC
|
|
// 2016-03-14 00:00:00.000 +0000 UTC
|
|
if unicode.IsLetter(r) {
|
|
// 2014-12-16 06:20:00.000 UTC
|
|
// 2017-01-27 00:07:31.945167 +0000 UTC
|
|
// 2016-03-14 00:00:00.000 +0000 UTC
|
|
state = stateDigitDashWsPeriodOffsetAlpha
|
|
break iterRunes
|
|
}
|
|
case stateDigitDashT: // starts digit then dash 02- then T
|
|
// stateDigitDashT
|
|
// 2006-01-02T15:04:05
|
|
// stateDigitDashTZ
|
|
// 2006-01-02T15:04:05.999999999Z
|
|
// 2006-01-02T15:04:05.99999999Z
|
|
// 2006-01-02T15:04:05.9999999Z
|
|
// 2006-01-02T15:04:05.999999Z
|
|
// 2006-01-02T15:04:05.99999Z
|
|
// 2006-01-02T15:04:05.9999Z
|
|
// 2006-01-02T15:04:05.999Z
|
|
// 2006-01-02T15:04:05.99Z
|
|
// 2009-08-12T22:15Z
|
|
// stateDigitDashTZDigit
|
|
// 2006-01-02T15:04:05.999999999Z07:00
|
|
// 2006-01-02T15:04:05Z07:00
|
|
// With another dash aka time-zone at end
|
|
// stateDigitDashTOffset
|
|
// stateDigitDashTOffsetColon
|
|
// 2017-06-25T17:46:57.45706582-07:00
|
|
// 2017-06-25T17:46:57+04:00
|
|
// 2006-01-02T15:04:05+0000
|
|
switch r {
|
|
case '-', '+':
|
|
state = stateDigitDashTOffset
|
|
case 'Z':
|
|
state = stateDigitDashTZ
|
|
}
|
|
case stateDigitDashTZ:
|
|
if unicode.IsDigit(r) {
|
|
state = stateDigitDashTZDigit
|
|
}
|
|
case stateDigitDashTOffset:
|
|
if r == ':' {
|
|
state = stateDigitDashTOffsetColon
|
|
}
|
|
case stateDigitSlash: // starts digit then slash 02/
|
|
// 2014/07/10 06:55:38.156283
|
|
// 03/19/2012 10:11:59
|
|
// 04/2/2014 03:00:37
|
|
// 3/1/2012 10:11:59
|
|
// 4/8/2014 22:05
|
|
// 3/1/2014
|
|
// 10/13/2014
|
|
// 01/02/2006
|
|
// 1/2/06
|
|
if unicode.IsDigit(r) || r == '/' {
|
|
continue
|
|
}
|
|
switch r {
|
|
case ' ':
|
|
state = stateDigitSlashWS
|
|
}
|
|
case stateDigitSlashWS: // starts digit then slash 02/ more digits/slashes then whitespace
|
|
// 2014/07/10 06:55:38.156283
|
|
// 03/19/2012 10:11:59
|
|
// 04/2/2014 03:00:37
|
|
// 3/1/2012 10:11:59
|
|
// 4/8/2014 22:05
|
|
switch r {
|
|
case ':':
|
|
state = stateDigitSlashWSColon
|
|
}
|
|
case stateDigitSlashWSColon: // starts digit then slash 02/ more digits/slashes then whitespace
|
|
// 2014/07/10 06:55:38.156283
|
|
// 03/19/2012 10:11:59
|
|
// 04/2/2014 03:00:37
|
|
// 3/1/2012 10:11:59
|
|
// 4/8/2014 22:05
|
|
// 3/1/2012 10:11:59 AM
|
|
switch r {
|
|
case ':':
|
|
state = stateDigitSlashWSColonColon
|
|
case 'A', 'P':
|
|
state = stateDigitSlashWSColonAMPM
|
|
}
|
|
case stateDigitSlashWSColonColon: // starts digit then slash 02/ more digits/slashes then whitespace
|
|
// 2014/07/10 06:55:38.156283
|
|
// 03/19/2012 10:11:59
|
|
// 04/2/2014 03:00:37
|
|
// 3/1/2012 10:11:59
|
|
// 4/8/2014 22:05
|
|
// 3/1/2012 10:11:59 AM
|
|
switch r {
|
|
case 'A', 'P':
|
|
state = stateDigitSlashWSColonColonAMPM
|
|
}
|
|
case stateDigitAlpha:
|
|
// 12 Feb 2006, 19:17
|
|
// 12 Feb 2006, 19:17:22
|
|
switch {
|
|
case len(datestr) == len("02 Jan 2006, 15:04"):
|
|
return parse("02 Jan 2006, 15:04", datestr, loc)
|
|
case len(datestr) == len("02 Jan 2006, 15:04:05"):
|
|
return parse("02 Jan 2006, 15:04:05", datestr, loc)
|
|
}
|
|
case stateAlpha: // starts alpha
|
|
// stateAlphaWS
|
|
// Mon Jan _2 15:04:05 2006
|
|
// Mon Jan _2 15:04:05 MST 2006
|
|
// Mon Jan 02 15:04:05 -0700 2006
|
|
// Mon Aug 10 15:44:11 UTC+0100 2015
|
|
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
|
|
// stateAlphaWSDigitComma
|
|
// May 8, 2009 5:57:51 PM
|
|
//
|
|
// stateWeekdayComma
|
|
// Monday, 02-Jan-06 15:04:05 MST
|
|
// stateWeekdayCommaOffset
|
|
// Monday, 02 Jan 2006 15:04:05 -0700
|
|
// Monday, 02 Jan 2006 15:04:05 +0100
|
|
// stateWeekdayAbbrevComma
|
|
// Mon, 02-Jan-06 15:04:05 MST
|
|
// Mon, 02 Jan 2006 15:04:05 MST
|
|
// stateWeekdayAbbrevCommaOffset
|
|
// Mon, 02 Jan 2006 15:04:05 -0700
|
|
// Thu, 13 Jul 2017 08:58:40 +0100
|
|
// stateWeekdayAbbrevCommaOffsetZone
|
|
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
|
|
switch {
|
|
case unicode.IsLetter(r):
|
|
continue
|
|
case r == ' ':
|
|
state = stateAlphaWS
|
|
case r == ',':
|
|
if i == 3 {
|
|
state = stateWeekdayAbbrevComma
|
|
} else {
|
|
state = stateWeekdayComma
|
|
}
|
|
}
|
|
case stateWeekdayComma: // Starts alpha then comma
|
|
// Mon, 02-Jan-06 15:04:05 MST
|
|
// Mon, 02 Jan 2006 15:04:05 MST
|
|
// stateWeekdayCommaOffset
|
|
// Monday, 02 Jan 2006 15:04:05 -0700
|
|
// Monday, 02 Jan 2006 15:04:05 +0100
|
|
switch {
|
|
case r == '-':
|
|
if i < 15 {
|
|
return parse("Monday, 02-Jan-06 15:04:05 MST", datestr, loc)
|
|
}
|
|
state = stateWeekdayCommaOffset
|
|
case r == '+':
|
|
state = stateWeekdayCommaOffset
|
|
}
|
|
case stateWeekdayAbbrevComma: // Starts alpha then comma
|
|
// Mon, 02-Jan-06 15:04:05 MST
|
|
// Mon, 02 Jan 2006 15:04:05 MST
|
|
// stateWeekdayAbbrevCommaOffset
|
|
// Mon, 02 Jan 2006 15:04:05 -0700
|
|
// Thu, 13 Jul 2017 08:58:40 +0100
|
|
// stateWeekdayAbbrevCommaOffsetZone
|
|
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
|
|
switch {
|
|
case r == '-':
|
|
if i < 15 {
|
|
return parse("Mon, 02-Jan-06 15:04:05 MST", datestr, loc)
|
|
}
|
|
state = stateWeekdayAbbrevCommaOffset
|
|
case r == '+':
|
|
state = stateWeekdayAbbrevCommaOffset
|
|
}
|
|
|
|
case stateWeekdayAbbrevCommaOffset:
|
|
// stateWeekdayAbbrevCommaOffset
|
|
// Mon, 02 Jan 2006 15:04:05 -0700
|
|
// Thu, 13 Jul 2017 08:58:40 +0100
|
|
// stateWeekdayAbbrevCommaOffsetZone
|
|
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
|
|
if r == '(' {
|
|
state = stateWeekdayAbbrevCommaOffsetZone
|
|
}
|
|
|
|
case stateAlphaWS: // Starts alpha then whitespace
|
|
// Mon Jan _2 15:04:05 2006
|
|
// Mon Jan _2 15:04:05 MST 2006
|
|
// Mon Jan 02 15:04:05 -0700 2006
|
|
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
|
|
// Mon Aug 10 15:44:11 UTC+0100 2015
|
|
switch {
|
|
case unicode.IsLetter(r):
|
|
state = stateAlphaWSAlpha
|
|
case unicode.IsDigit(r):
|
|
state = stateAlphaWSDigitComma
|
|
}
|
|
|
|
case stateAlphaWSDigitComma: // Starts Alpha, whitespace, digit, comma
|
|
// May 8, 2009 5:57:51 PM
|
|
return parse("Jan 2, 2006 3:04:05 PM", datestr, loc)
|
|
|
|
case stateAlphaWSAlpha: // Alpha, whitespace, alpha
|
|
// Mon Jan _2 15:04:05 2006
|
|
// Mon Jan 02 15:04:05 -0700 2006
|
|
// Mon Jan _2 15:04:05 MST 2006
|
|
// Mon Aug 10 15:44:11 UTC+0100 2015
|
|
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
|
|
if r == ':' {
|
|
state = stateAlphaWSAlphaColon
|
|
}
|
|
case stateAlphaWSAlphaColon: // Alpha, whitespace, alpha, :
|
|
// Mon Jan _2 15:04:05 2006
|
|
// Mon Jan 02 15:04:05 -0700 2006
|
|
// Mon Jan _2 15:04:05 MST 2006
|
|
// Mon Aug 10 15:44:11 UTC+0100 2015
|
|
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
|
|
if unicode.IsLetter(r) {
|
|
state = stateAlphaWSAlphaColonAlpha
|
|
} else if r == '-' || r == '+' {
|
|
state = stateAlphaWSAlphaColonOffset
|
|
}
|
|
case stateAlphaWSAlphaColonAlpha: // Alpha, whitespace, alpha, :, alpha
|
|
// Mon Jan _2 15:04:05 MST 2006
|
|
// Mon Aug 10 15:44:11 UTC+0100 2015
|
|
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
|
|
if r == '+' {
|
|
state = stateAlphaWSAlphaColonAlphaOffset
|
|
}
|
|
case stateAlphaWSAlphaColonAlphaOffset: // Alpha, whitespace, alpha, : , alpha, offset, ?
|
|
// Mon Aug 10 15:44:11 UTC+0100 2015
|
|
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
|
|
if unicode.IsLetter(r) {
|
|
state = stateAlphaWSAlphaColonAlphaOffsetAlpha
|
|
}
|
|
default:
|
|
break iterRunes
|
|
}
|
|
}
|
|
|
|
switch state {
|
|
case stateDigit:
|
|
// unixy timestamps ish
|
|
// 1499979655583057426 nanoseconds
|
|
// 1499979795437000 micro-seconds
|
|
// 1499979795437 milliseconds
|
|
// 1384216367189
|
|
// 1332151919 seconds
|
|
// 20140601 yyyymmdd
|
|
// 2014 yyyy
|
|
if len(datestr) > len("1499979795437000") {
|
|
if nanoSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
|
|
return time.Unix(0, nanoSecs), nil
|
|
}
|
|
} else if len(datestr) > len("1499979795437") {
|
|
if microSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
|
|
return time.Unix(0, microSecs*1000), nil
|
|
}
|
|
} else if len(datestr) > len("1332151919") {
|
|
if miliSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
|
|
return time.Unix(0, miliSecs*1000*1000), nil
|
|
}
|
|
} else if len(datestr) == len("20140601") {
|
|
return parse("20060102", datestr, loc)
|
|
} else if len(datestr) == len("2014") {
|
|
return parse("2006", datestr, loc)
|
|
}
|
|
if secs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
|
|
return time.Unix(secs, 0), nil
|
|
}
|
|
case stateDigitDash: // starts digit then dash 02-
|
|
// 2006-01-02
|
|
// 2006-01
|
|
if len(datestr) == len("2014-04-26") {
|
|
return parse("2006-01-02", datestr, loc)
|
|
} else if len(datestr) == len("2014-04") {
|
|
return parse("2006-01", datestr, loc)
|
|
}
|
|
case stateDigitDashAlpha:
|
|
// 2013-Feb-03
|
|
return parse("2006-Jan-02", datestr, loc)
|
|
|
|
case stateDigitDashTOffset:
|
|
// 2006-01-02T15:04:05+0000
|
|
return parse("2006-01-02T15:04:05-0700", datestr, loc)
|
|
|
|
case stateDigitDashTOffsetColon:
|
|
// With another +/- time-zone at end
|
|
// 2006-01-02T15:04:05.999999999+07:00
|
|
// 2006-01-02T15:04:05.999999999-07:00
|
|
// 2006-01-02T15:04:05.999999+07:00
|
|
// 2006-01-02T15:04:05.999999-07:00
|
|
// 2006-01-02T15:04:05.999+07:00
|
|
// 2006-01-02T15:04:05.999-07:00
|
|
// 2006-01-02T15:04:05+07:00
|
|
// 2006-01-02T15:04:05-07:00
|
|
return parse("2006-01-02T15:04:05-07:00", datestr, loc)
|
|
|
|
case stateDigitDashT: // starts digit then dash 02- then T
|
|
// 2006-01-02T15:04:05.999999
|
|
// 2006-01-02T15:04:05.999999
|
|
return parse("2006-01-02T15:04:05", datestr, loc)
|
|
|
|
case stateDigitDashTZDigit:
|
|
// With a time-zone at end after Z
|
|
// 2006-01-02T15:04:05.999999999Z07:00
|
|
// 2006-01-02T15:04:05Z07:00
|
|
// RFC3339 = "2006-01-02T15:04:05Z07:00"
|
|
// RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00"
|
|
return time.Time{}, fmt.Errorf("RFC339 Dates may not contain both Z & Offset for %q see https://github.com/golang/go/issues/5294", datestr)
|
|
|
|
case stateDigitDashTZ: // starts digit then dash 02- then T Then Z
|
|
// 2006-01-02T15:04:05.999999999Z
|
|
// 2006-01-02T15:04:05.99999999Z
|
|
// 2006-01-02T15:04:05.9999999Z
|
|
// 2006-01-02T15:04:05.999999Z
|
|
// 2006-01-02T15:04:05.99999Z
|
|
// 2006-01-02T15:04:05.9999Z
|
|
// 2006-01-02T15:04:05.999Z
|
|
// 2006-01-02T15:04:05.99Z
|
|
// 2009-08-12T22:15Z -- No seconds/milliseconds
|
|
switch len(datestr) {
|
|
case len("2009-08-12T22:15Z"):
|
|
return parse("2006-01-02T15:04Z", datestr, loc)
|
|
default:
|
|
return parse("2006-01-02T15:04:05Z", datestr, loc)
|
|
}
|
|
case stateDigitDashWs: // starts digit then dash 02- then whitespace 1 << 2 << 5 + 3
|
|
// 2013-04-01 22:43:22
|
|
return parse("2006-01-02 15:04:05", datestr, loc)
|
|
|
|
case stateDigitDashWsWsOffset:
|
|
// 2006-01-02 15:04:05 -0700
|
|
return parse("2006-01-02 15:04:05 -0700", datestr, loc)
|
|
|
|
case stateDigitDashWsWsOffsetColon:
|
|
// 2006-01-02 15:04:05 -07:00
|
|
return parse("2006-01-02 15:04:05 -07:00", datestr, loc)
|
|
|
|
case stateDigitDashWsWsOffsetAlpha:
|
|
// 2015-02-18 00:12:00 +0000 UTC
|
|
t, err := parse("2006-01-02 15:04:05 -0700 UTC", datestr, loc)
|
|
if err == nil {
|
|
return t, nil
|
|
}
|
|
return parse("2006-01-02 15:04:05 +0000 GMT", datestr, loc)
|
|
|
|
case stateDigitDashWsWsOffsetColonAlpha:
|
|
// 2015-02-18 00:12:00 +00:00 UTC
|
|
return parse("2006-01-02 15:04:05 -07:00 UTC", datestr, loc)
|
|
|
|
case stateDigitDashWsOffset:
|
|
// 2017-07-19 03:21:51+00:00
|
|
return parse("2006-01-02 15:04:05-07:00", datestr, loc)
|
|
|
|
case stateDigitDashWsWsAlpha:
|
|
// 2014-12-16 06:20:00 UTC
|
|
t, err := parse("2006-01-02 15:04:05 UTC", datestr, loc)
|
|
if err == nil {
|
|
return t, nil
|
|
}
|
|
t, err = parse("2006-01-02 15:04:05 GMT", datestr, loc)
|
|
if err == nil {
|
|
return t, nil
|
|
}
|
|
if len(datestr) > len("2006-01-02 03:04:05") {
|
|
t, err = parse("2006-01-02 03:04:05", datestr[:len("2006-01-02 03:04:05")], loc)
|
|
if err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
|
|
case stateDigitDashWsPeriod:
|
|
// 2012-08-03 18:31:59.257000000
|
|
// 2014-04-26 17:24:37.3186369
|
|
// 2017-01-27 00:07:31.945167
|
|
// 2016-03-14 00:00:00.000
|
|
return parse("2006-01-02 15:04:05", datestr, loc)
|
|
|
|
case stateDigitDashWsPeriodAlpha:
|
|
// 2012-08-03 18:31:59.257000000 UTC
|
|
// 2014-04-26 17:24:37.3186369 UTC
|
|
// 2017-01-27 00:07:31.945167 UTC
|
|
// 2016-03-14 00:00:00.000 UTC
|
|
return parse("2006-01-02 15:04:05 UTC", datestr, loc)
|
|
|
|
case stateDigitDashWsPeriodOffset:
|
|
// 2012-08-03 18:31:59.257000000 +0000
|
|
// 2014-04-26 17:24:37.3186369 +0000
|
|
// 2017-01-27 00:07:31.945167 +0000
|
|
// 2016-03-14 00:00:00.000 +0000
|
|
return parse("2006-01-02 15:04:05 -0700", datestr, loc)
|
|
|
|
case stateDigitDashWsPeriodOffsetAlpha:
|
|
// 2012-08-03 18:31:59.257000000 +0000 UTC
|
|
// 2014-04-26 17:24:37.3186369 +0000 UTC
|
|
// 2017-01-27 00:07:31.945167 +0000 UTC
|
|
// 2016-03-14 00:00:00.000 +0000 UTC
|
|
return parse("2006-01-02 15:04:05 -0700 UTC", datestr, loc)
|
|
|
|
case stateAlphaWSAlphaColon:
|
|
// Mon Jan _2 15:04:05 2006
|
|
return parse(time.ANSIC, datestr, loc)
|
|
|
|
case stateAlphaWSAlphaColonOffset:
|
|
// Mon Jan 02 15:04:05 -0700 2006
|
|
return parse(time.RubyDate, datestr, loc)
|
|
|
|
case stateAlphaWSAlphaColonAlpha:
|
|
// Mon Jan _2 15:04:05 MST 2006
|
|
return parse(time.UnixDate, datestr, loc)
|
|
|
|
case stateAlphaWSAlphaColonAlphaOffset:
|
|
// Mon Aug 10 15:44:11 UTC+0100 2015
|
|
return parse("Mon Jan 02 15:04:05 MST-0700 2006", datestr, loc)
|
|
|
|
case stateAlphaWSAlphaColonAlphaOffsetAlpha:
|
|
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
|
|
if len(datestr) > len("Mon Jan 02 2006 15:04:05 MST-0700") {
|
|
// What effing time stamp is this?
|
|
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
|
|
dateTmp := datestr[:33]
|
|
return parse("Mon Jan 02 2006 15:04:05 MST-0700", dateTmp, loc)
|
|
}
|
|
case stateDigitSlash: // starts digit then slash 02/ (but nothing else)
|
|
// 3/1/2014
|
|
// 10/13/2014
|
|
// 01/02/2006
|
|
// 2014/10/13
|
|
if firstSlash == 4 {
|
|
if len(datestr) == len("2006/01/02") {
|
|
return parse("2006/01/02", datestr, loc)
|
|
}
|
|
return parse("2006/1/2", datestr, loc)
|
|
} else {
|
|
for _, parseFormat := range shortDates {
|
|
if t, err := parse(parseFormat, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
}
|
|
|
|
case stateDigitSlashWSColon: // starts digit then slash 02/ more digits/slashes then whitespace
|
|
// 4/8/2014 22:05
|
|
// 04/08/2014 22:05
|
|
// 2014/4/8 22:05
|
|
// 2014/04/08 22:05
|
|
|
|
if firstSlash == 4 {
|
|
for _, layout := range []string{"2006/01/02 15:04", "2006/1/2 15:04", "2006/01/2 15:04", "2006/1/02 15:04"} {
|
|
if t, err := parse(layout, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
} else {
|
|
for _, layout := range []string{"01/02/2006 15:04", "01/2/2006 15:04", "1/02/2006 15:04", "1/2/2006 15:04"} {
|
|
if t, err := parse(layout, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
}
|
|
|
|
case stateDigitSlashWSColonAMPM: // starts digit then slash 02/ more digits/slashes then whitespace
|
|
// 4/8/2014 22:05 PM
|
|
// 04/08/2014 22:05 PM
|
|
// 04/08/2014 1:05 PM
|
|
// 2014/4/8 22:05 PM
|
|
// 2014/04/08 22:05 PM
|
|
|
|
if firstSlash == 4 {
|
|
for _, layout := range []string{"2006/01/02 03:04 PM", "2006/01/2 03:04 PM", "2006/1/02 03:04 PM", "2006/1/2 03:04 PM",
|
|
"2006/01/02 3:04 PM", "2006/01/2 3:04 PM", "2006/1/02 3:04 PM", "2006/1/2 3:04 PM"} {
|
|
if t, err := parse(layout, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
} else {
|
|
for _, layout := range []string{"01/02/2006 03:04 PM", "01/2/2006 03:04 PM", "1/02/2006 03:04 PM", "1/2/2006 03:04 PM",
|
|
"01/02/2006 3:04 PM", "01/2/2006 3:04 PM", "1/02/2006 3:04 PM", "1/2/2006 3:04 PM"} {
|
|
if t, err := parse(layout, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
case stateDigitSlashWSColonColon: // starts digit then slash 02/ more digits/slashes then whitespace double colons
|
|
// 2014/07/10 06:55:38.156283
|
|
// 03/19/2012 10:11:59
|
|
// 3/1/2012 10:11:59
|
|
// 03/1/2012 10:11:59
|
|
// 3/01/2012 10:11:59
|
|
if firstSlash == 4 {
|
|
for _, layout := range []string{"2006/01/02 15:04:05", "2006/1/02 15:04:05", "2006/01/2 15:04:05", "2006/1/2 15:04:05"} {
|
|
if t, err := parse(layout, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
} else {
|
|
for _, layout := range []string{"01/02/2006 15:04:05", "1/02/2006 15:04:05", "01/2/2006 15:04:05", "1/2/2006 15:04:05"} {
|
|
if t, err := parse(layout, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
}
|
|
|
|
case stateDigitSlashWSColonColonAMPM: // starts digit then slash 02/ more digits/slashes then whitespace double colons
|
|
// 2014/07/10 06:55:38.156283 PM
|
|
// 03/19/2012 10:11:59 PM
|
|
// 3/1/2012 10:11:59 PM
|
|
// 03/1/2012 10:11:59 PM
|
|
// 3/01/2012 10:11:59 PM
|
|
|
|
if firstSlash == 4 {
|
|
for _, layout := range []string{"2006/01/02 03:04:05 PM", "2006/1/02 03:04:05 PM", "2006/01/2 03:04:05 PM", "2006/1/2 03:04:05 PM",
|
|
"2006/01/02 3:04:05 PM", "2006/1/02 3:04:05 PM", "2006/01/2 3:04:05 PM", "2006/1/2 3:04:05 PM"} {
|
|
if t, err := parse(layout, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
} else {
|
|
for _, layout := range []string{"01/02/2006 03:04:05 PM", "1/02/2006 03:04:05 PM", "01/2/2006 03:04:05 PM", "1/2/2006 03:04:05 PM"} {
|
|
if t, err := parse(layout, datestr, loc); err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
}
|
|
|
|
case stateWeekdayCommaOffset:
|
|
// Monday, 02 Jan 2006 15:04:05 -0700
|
|
// Monday, 02 Jan 2006 15:04:05 +0100
|
|
return parse("Monday, 02 Jan 2006 15:04:05 -0700", datestr, loc)
|
|
case stateWeekdayAbbrevComma: // Starts alpha then comma
|
|
// Mon, 02-Jan-06 15:04:05 MST
|
|
// Mon, 02 Jan 2006 15:04:05 MST
|
|
return parse("Mon, 02 Jan 2006 15:04:05 MST", datestr, loc)
|
|
case stateWeekdayAbbrevCommaOffset:
|
|
// Mon, 02 Jan 2006 15:04:05 -0700
|
|
// Thu, 13 Jul 2017 08:58:40 +0100
|
|
// RFC1123Z = "Mon, 02 Jan 2006 15:04:05 -0700" // RFC1123 with numeric zone
|
|
return parse("Mon, 02 Jan 2006 15:04:05 -0700", datestr, loc)
|
|
case stateWeekdayAbbrevCommaOffsetZone:
|
|
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
|
|
return parse("Mon, 02 Jan 2006 15:04:05 -0700 (CEST)", datestr, loc)
|
|
}
|
|
|
|
return time.Time{}, fmt.Errorf("Could not find date format for %s", datestr)
|
|
}
|