dateparse/parseany.go
2017-07-26 18:27:53 -07:00

848 lines
25 KiB
Go

package dateparse
import (
"fmt"
"strconv"
"time"
"unicode"
)
type dateState int
const (
st_START dateState = iota
st_DIGIT
st_DIGITDASH
st_DIGITDASHALPHA
st_DIGITDASHWS
st_DIGITDASHWSWS
st_DIGITDASHWSWSAMPMMAYBE
st_DIGITDASHWSWSOFFSET
st_DIGITDASHWSWSOFFSETALPHA
st_DIGITDASHWSWSOFFSETCOLONALPHA
st_DIGITDASHWSWSOFFSETCOLON
st_DIGITDASHWSOFFSET
st_DIGITDASHWSWSALPHA
st_DIGITDASHWSDOT
st_DIGITDASHWSDOTALPHA
st_DIGITDASHWSDOTOFFSET
st_DIGITDASHWSDOTOFFSETALPHA
st_DIGITDASHT
st_DIGITDASHTZ
st_DIGITDASHTZDIGIT
st_DIGITDASHTDELTA
st_DIGITDASHTDELTACOLON
st_DIGITSLASH
st_DIGITSLASHWS
st_DIGITSLASHWSCOLON
st_DIGITSLASHWSCOLONAMPM
st_DIGITSLASHWSCOLONCOLON
st_DIGITSLASHWSCOLONCOLONAMPM
st_DIGITALPHA
st_ALPHA
st_ALPHAWS
st_ALPHAWSDIGITCOMMA
st_ALPHAWSALPHA
st_ALPHAWSALPHACOLON
st_ALPHAWSALPHACOLONOFFSET
st_ALPHAWSALPHACOLONALPHA
st_ALPHAWSALPHACOLONALPHAOFFSET
st_ALPHAWSALPHACOLONALPHAOFFSETALPHA
st_WEEKDAYCOMMA
st_WEEKDAYCOMMADELTA
st_WEEKDAYABBREVCOMMA
st_WEEKDAYABBREVCOMMADELTA
st_WEEKDAYABBREVCOMMADELTAZONE
)
var (
shortDates = []string{"01/02/2006", "1/2/2006", "06/01/02", "01/02/06", "1/2/06"}
)
// MustParse Parse a date, and panic if it can't be parsed
func MustParse(datestr string) time.Time {
t, err := parseTime(datestr, nil)
if err != nil {
panic(err.Error())
}
return t
}
// ParseAny Given an unknown date format, detect the layout, parse.
func ParseAny(datestr string) (time.Time, error) {
return parseTime(datestr, nil)
}
// ParseIn Given an unknown date format, detect the layout,
// using given location, parse.
//
// If no recognized Timezone/Offset info exists in the datestring, it uses
// given location. IF there IS timezone/offset info it uses the given location
// info 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.
//
// If no recognized Timezone/Offset info exists in the datestring, it uses
// given location. IF there IS timezone/offset info it uses the given location
// info for any zone interpretation. That is, MST means one thing when using
// America/Denver and something else in other locations.
func ParseLocal(datestr string) (time.Time, error) {
return parseTime(datestr, time.Local)
}
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 := st_START
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 st_START:
if unicode.IsDigit(r) {
state = st_DIGIT
} else if unicode.IsLetter(r) {
state = st_ALPHA
}
case st_DIGIT: // starts digits
if unicode.IsDigit(r) {
continue
} else if unicode.IsLetter(r) {
state = st_DIGITALPHA
continue
}
switch r {
case '-', '\u2212':
state = st_DIGITDASH
case '/':
state = st_DIGITSLASH
firstSlash = i
}
case st_DIGITDASH: // 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 = st_DIGITDASHWS
case r == 'T':
state = st_DIGITDASHT
default:
if unicode.IsLetter(r) {
state = st_DIGITDASHALPHA
break iterRunes
}
}
case st_DIGITDASHWS:
// 2013-04-01 22:43:22
// 2014-05-11 08:20:13,787
// st_DIGITDASHWSWS
// 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
// st_DIGITDASHWSOFFSET
// 2017-07-19 03:21:51+00:00
// st_DIGITDASHWSDOT
// 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
// st_DIGITDASHWSDOTOFFSET
// 2017-01-27 00:07:31.945167 +0000
// 2016-03-14 00:00:00.000 +0000
// st_DIGITDASHWSDOTOFFSETALPHA
// 2017-01-27 00:07:31.945167 +0000 UTC
// 2016-03-14 00:00:00.000 +0000 UTC
// st_DIGITDASHWSDOTALPHA
// 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 = st_DIGITDASHWSOFFSET
case '.':
state = st_DIGITDASHWSDOT
case ' ':
state = st_DIGITDASHWSWS
}
case st_DIGITDASHWSWS:
// st_DIGITDASHWSWSALPHA
// 2014-12-16 06:20:00 UTC
// st_DIGITDASHWSWSAMPMMAYBE
// 2014-04-26 05:24:37 PM
// st_DIGITDASHWSWSOFFSET
// 2006-01-02 15:04:05 -0700
// st_DIGITDASHWSWSOFFSETCOLON
// 2006-01-02 15:04:05 -07:00
// st_DIGITDASHWSWSOFFSETCOLONALPHA
// 2015-02-18 00:12:00 +00:00 UTC
// st_DIGITDASHWSWSOFFSETALPHA
// 2015-02-18 00:12:00 +0000 UTC
switch r {
case 'A', 'P':
state = st_DIGITDASHWSWSAMPMMAYBE
case '+', '-':
state = st_DIGITDASHWSWSOFFSET
default:
if unicode.IsLetter(r) {
// 2014-12-16 06:20:00 UTC
state = st_DIGITDASHWSWSALPHA
break iterRunes
}
}
case st_DIGITDASHWSWSAMPMMAYBE:
if r == 'M' {
return parse("2006-01-02 03:04:05 PM", datestr, loc)
}
state = st_DIGITDASHWSWSALPHA
case st_DIGITDASHWSWSOFFSET:
// st_DIGITDASHWSWSOFFSET
// 2006-01-02 15:04:05 -0700
// st_DIGITDASHWSWSOFFSETCOLON
// 2006-01-02 15:04:05 -07:00
// st_DIGITDASHWSWSOFFSETCOLONALPHA
// 2015-02-18 00:12:00 +00:00 UTC
// st_DIGITDASHWSWSOFFSETALPHA
// 2015-02-18 00:12:00 +0000 UTC
if r == ':' {
state = st_DIGITDASHWSWSOFFSETCOLON
} else if unicode.IsLetter(r) {
// 2015-02-18 00:12:00 +0000 UTC
state = st_DIGITDASHWSWSOFFSETALPHA
break iterRunes
}
case st_DIGITDASHWSWSOFFSETCOLON:
// st_DIGITDASHWSWSOFFSETCOLON
// 2006-01-02 15:04:05 -07:00
// st_DIGITDASHWSWSOFFSETCOLONALPHA
// 2015-02-18 00:12:00 +00:00 UTC
if unicode.IsLetter(r) {
// 2015-02-18 00:12:00 +00:00 UTC
state = st_DIGITDASHWSWSOFFSETCOLONALPHA
break iterRunes
}
case st_DIGITDASHWSDOT:
// 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
// st_DIGITDASHWSDOTOFFSET
// 2017-01-27 00:07:31.945167 +0000
// 2016-03-14 00:00:00.000 +0000
// st_DIGITDASHWSDOTOFFSETALPHA
// 2017-01-27 00:07:31.945167 +0000 UTC
// 2016-03-14 00:00:00.000 +0000 UTC
// st_DIGITDASHWSDOTALPHA
// 2014-12-16 06:20:00.000 UTC
if unicode.IsLetter(r) {
// 2014-12-16 06:20:00.000 UTC
state = st_DIGITDASHWSDOTALPHA
break iterRunes
} else if r == '+' || r == '-' {
state = st_DIGITDASHWSDOTOFFSET
}
case st_DIGITDASHWSDOTOFFSET:
// 2017-01-27 00:07:31.945167 +0000
// 2016-03-14 00:00:00.000 +0000
// st_DIGITDASHWSDOTOFFSETALPHA
// 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 = st_DIGITDASHWSDOTOFFSETALPHA
break iterRunes
}
case st_DIGITDASHT: // starts digit then dash 02- then T
// st_DIGITDASHT
// 2006-01-02T15:04:05
// st_DIGITDASHTZ
// 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
// st_DIGITDASHTZDIGIT
// 2006-01-02T15:04:05.999999999Z07:00
// 2006-01-02T15:04:05Z07:00
// With another dash aka time-zone at end
// st_DIGITDASHTDELTA
// st_DIGITDASHTDELTACOLON
// 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 = st_DIGITDASHTDELTA
case 'Z':
state = st_DIGITDASHTZ
}
case st_DIGITDASHTZ:
if unicode.IsDigit(r) {
state = st_DIGITDASHTZDIGIT
}
case st_DIGITDASHTDELTA:
if r == ':' {
state = st_DIGITDASHTDELTACOLON
}
case st_DIGITSLASH: // 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 = st_DIGITSLASHWS
}
case st_DIGITSLASHWS: // 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 = st_DIGITSLASHWSCOLON
}
case st_DIGITSLASHWSCOLON: // 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 = st_DIGITSLASHWSCOLONCOLON
case 'A', 'P':
state = st_DIGITSLASHWSCOLONAMPM
}
case st_DIGITSLASHWSCOLONCOLON: // 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 = st_DIGITSLASHWSCOLONCOLONAMPM
}
case st_DIGITALPHA:
// 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 st_ALPHA: // starts alpha
// st_ALPHAWS
// 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)
// st_ALPHAWSDIGITCOMMA
// May 8, 2009 5:57:51 PM
//
// st_WEEKDAYCOMMA
// Monday, 02-Jan-06 15:04:05 MST
// st_WEEKDAYCOMMADELTA
// Monday, 02 Jan 2006 15:04:05 -0700
// Monday, 02 Jan 2006 15:04:05 +0100
// st_WEEKDAYABBREVCOMMA
// Mon, 02-Jan-06 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 MST
// st_WEEKDAYABBREVCOMMADELTA
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
// st_WEEKDAYABBREVCOMMADELTAZONE
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
switch {
case unicode.IsLetter(r):
continue
case r == ' ':
state = st_ALPHAWS
case r == ',':
if i == 3 {
state = st_WEEKDAYABBREVCOMMA
} else {
state = st_WEEKDAYCOMMA
}
}
case st_WEEKDAYCOMMA: // Starts alpha then comma
// Mon, 02-Jan-06 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 MST
// st_WEEKDAYCOMMADELTA
// 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)
} else {
state = st_WEEKDAYCOMMADELTA
}
case r == '+':
state = st_WEEKDAYCOMMADELTA
}
case st_WEEKDAYABBREVCOMMA: // Starts alpha then comma
// Mon, 02-Jan-06 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 MST
// st_WEEKDAYABBREVCOMMADELTA
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
// st_WEEKDAYABBREVCOMMADELTAZONE
// 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)
} else {
state = st_WEEKDAYABBREVCOMMADELTA
}
case r == '+':
state = st_WEEKDAYABBREVCOMMADELTA
}
case st_WEEKDAYABBREVCOMMADELTA:
// st_WEEKDAYABBREVCOMMADELTA
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
// st_WEEKDAYABBREVCOMMADELTAZONE
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
if r == '(' {
state = st_WEEKDAYABBREVCOMMADELTAZONE
}
case st_ALPHAWS: // 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 = st_ALPHAWSALPHA
case unicode.IsDigit(r):
state = st_ALPHAWSDIGITCOMMA
}
case st_ALPHAWSDIGITCOMMA: // Starts Alpha, whitespace, digit, comma
// May 8, 2009 5:57:51 PM
return parse("Jan 2, 2006 3:04:05 PM", datestr, loc)
case st_ALPHAWSALPHA: // 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 = st_ALPHAWSALPHACOLON
}
case st_ALPHAWSALPHACOLON: // 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 = st_ALPHAWSALPHACOLONALPHA
} else if r == '-' || r == '+' {
state = st_ALPHAWSALPHACOLONOFFSET
}
case st_ALPHAWSALPHACOLONALPHA: // 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 = st_ALPHAWSALPHACOLONALPHAOFFSET
}
case st_ALPHAWSALPHACOLONALPHAOFFSET: // 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 = st_ALPHAWSALPHACOLONALPHAOFFSETALPHA
}
default:
break iterRunes
}
}
switch state {
case st_DIGIT:
// 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)
} else {
if secs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(secs, 0), nil
}
}
case st_DIGITDASH: // 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 st_DIGITDASHALPHA:
// 2013-Feb-03
return parse("2006-Jan-02", datestr, loc)
case st_DIGITDASHTDELTA:
// 2006-01-02T15:04:05+0000
return parse("2006-01-02T15:04:05-0700", datestr, loc)
case st_DIGITDASHTDELTACOLON:
// 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 st_DIGITDASHT: // 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 st_DIGITDASHTZDIGIT:
// 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 st_DIGITDASHTZ: // 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 st_DIGITDASHWS: // 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 st_DIGITDASHWSWSOFFSET:
// 2006-01-02 15:04:05 -0700
return parse("2006-01-02 15:04:05 -0700", datestr, loc)
case st_DIGITDASHWSWSOFFSETCOLON:
// 2006-01-02 15:04:05 -07:00
return parse("2006-01-02 15:04:05 -07:00", datestr, loc)
case st_DIGITDASHWSWSOFFSETALPHA:
// 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 st_DIGITDASHWSWSOFFSETCOLONALPHA:
// 2015-02-18 00:12:00 +00:00 UTC
return parse("2006-01-02 15:04:05 -07:00 UTC", datestr, loc)
case st_DIGITDASHWSOFFSET:
// 2017-07-19 03:21:51+00:00
return parse("2006-01-02 15:04:05-07:00", datestr, loc)
case st_DIGITDASHWSWSALPHA:
// 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 st_DIGITDASHWSDOT:
// 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 st_DIGITDASHWSDOTALPHA:
// 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 st_DIGITDASHWSDOTOFFSET:
// 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 st_DIGITDASHWSDOTOFFSETALPHA:
// 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 st_ALPHAWSALPHACOLON:
// Mon Jan _2 15:04:05 2006
return parse(time.ANSIC, datestr, loc)
case st_ALPHAWSALPHACOLONOFFSET:
// Mon Jan 02 15:04:05 -0700 2006
return parse(time.RubyDate, datestr, loc)
case st_ALPHAWSALPHACOLONALPHA:
// Mon Jan _2 15:04:05 MST 2006
return parse(time.UnixDate, datestr, loc)
case st_ALPHAWSALPHACOLONALPHAOFFSET:
// Mon Aug 10 15:44:11 UTC+0100 2015
return parse("Mon Jan 02 15:04:05 MST-0700 2006", datestr, loc)
case st_ALPHAWSALPHACOLONALPHAOFFSETALPHA:
// 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 st_DIGITSLASH: // 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)
} else {
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 st_DIGITSLASHWSCOLON: // 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 st_DIGITSLASHWSCOLONAMPM: // 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 st_DIGITSLASHWSCOLONCOLON: // 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 st_DIGITSLASHWSCOLONCOLONAMPM: // 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 st_WEEKDAYCOMMADELTA:
// 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 st_WEEKDAYABBREVCOMMA: // 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 st_WEEKDAYABBREVCOMMADELTA:
// 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 st_WEEKDAYABBREVCOMMADELTAZONE:
// 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)
}