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dateparse/parseany.go
junichif 91bb6b61cd merge plus/minus state
2017-07-11 13:40:58 -07:00

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package dateparse
import (
"fmt"
"strconv"
"time"
"unicode"
"unicode/utf8"
)
type DateState int
const (
// C = Comma
// O = Colon
// E = Period/Dot
// A = Alpha
// N = Digits/Numeric
// S = Slash /
// P = Plus +
// m = Minus, Dash, -
// T = T
// Z = Z
// M = AM/PM
// W = Whitespace
ST_START DateState = iota
ST_DIGIT
ST_DIGITDASH
ST_DIGITDASHWS
ST_DIGITDASHWSALPHA
ST_DIGITDASHWSDOT
ST_DIGITDASHWSDOTALPHA
ST_DIGITDASHWSDOTPLUS
ST_DIGITDASHWSDOTPLUSALPHA
ST_DIGITDASHT
ST_DIGITDASHTZ
ST_DIGITDASHTZDIGIT
ST_DIGITDASHTDELTA
ST_DIGITCOMMA
ST_DIGITCOLON
ST_DIGITSLASH
ST_DIGITSLASHWS
ST_DIGITSLASHWSCOLON
ST_DIGITSLASHWSCOLONAMPM
ST_DIGITSLASHWSCOLONCOLON
ST_DIGITSLASHWSCOLONCOLONAMPM
ST_DIGITALPHA
ST_ALPHA
ST_ALPHAWS
ST_ALPHAWSCOMMA
ST_ALPHAWSALPHA
ST_ALPHAWSALPHACOLON
ST_ALPHAWSALPHACOLONOFFSET
ST_ALPHAWSALPHACOLONALPHA
ST_ALPHAWSALPHACOLONALPHAOFFSET
ST_ALPHAWSALPHACOLONALPHAOFFSETALPHA
ST_ALPHACOMMA
ST_ALPHACOMMADASH
ST_ALPHACOMMADASHDASH
ST_MONTHCOMMA
ST_WEEKDAYCOMMA
ST_WEEKDAYABBREVCOMMA
)
var (
shortDates = []string{"01/02/2006", "1/2/2006", "06/01/02", "01/02/06", "1/2/06"}
weekdays = map[string]bool{"Monday": true, "Tuesday": true, "Wednesday": true, "Thursday": true, "Friday": true, "Saturday": true, "Sunday": true}
weekdayAbbrev = map[string]bool{"Mon": true, "Tue": true, "Wed": true, "Thu": true, "Fri": true, "Sat": true, "Sun": true}
)
// Parse a date, and panic if it can't be parsed
func MustParse(datestr string) time.Time {
t, err := ParseAny(datestr)
if err != nil {
panic(err.Error())
}
return t
}
// Given an unknown date format, detect the type, parse, return time
func ParseAny(datestr string) (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, bytesConsumed := utf8.DecodeRuneInString(datestr[i:])
if bytesConsumed > 1 {
i += (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 ',':
state = ST_DIGITCOMMA
case '-':
state = ST_DIGITDASH
case ':':
state = ST_DIGITCOLON
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
// 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
// 2006-01-02
// 2013-04-01 22:43:22
// 2014-04-26 05:24:37 PM
switch {
case r == ' ':
state = ST_DIGITDASHWS
case r == 'T':
state = ST_DIGITDASHT
}
case ST_DIGITDASHWS: // starts digit then dash 02- then whitespace
// 2013-04-01 22:43:22
// 2014-05-11 08:20:13,787
// 2014-04-26 05:24:37 PM
// 2014-12-16 06:20:00 UTC
// 2015-02-18 00:12:00 +0000 UTC
// 2015-06-25 01:25:37.115208593 +0000 UTC
switch r {
case 'A', 'P':
if len(datestr) == len("2014-04-26 03:24:37 PM") {
if t, err := time.Parse("2006-01-02 03:04:05 PM", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
}
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?
if t, err := time.Parse("2006-01-02 03:04:05", datestr[:i]); err == nil {
ms, err := strconv.Atoi(datestr[i+1:])
if err == nil {
return time.Unix(0, t.UnixNano()+int64(ms)*1e6), nil
}
return time.Time{}, err
} else {
return time.Time{}, err
}
}
case '.':
state = ST_DIGITDASHWSDOT
default:
if unicode.IsLetter(r) {
// 2014-12-16 06:20:00 UTC
state = ST_DIGITDASHWSALPHA
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
if unicode.IsLetter(r) {
// 2014-12-16 06:20:00.000 UTC
state = ST_DIGITDASHWSDOTALPHA
break iterRunes
} else if r == '+' || r == '-' {
state = ST_DIGITDASHWSDOTPLUS
}
case ST_DIGITDASHWSDOTPLUS:
// 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
if unicode.IsLetter(r) {
// 2014-12-16 06:20:00.000 UTC
state = ST_DIGITDASHWSDOTPLUSALPHA
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
// ST_DIGITDASHTZDIGIT
// 2006-01-02T15:04:05.999999999Z07:00
// 2006-01-02T15:04:05Z07:00
// With another dash aka time-zone at end
// ST_DIGITDASHTDASH
// 2017-06-25T17:46:57.45706582-07:00
// 2017-06-25T17:46:57+04:00
switch {
case r == '-', r == '+':
state = ST_DIGITDASHTDELTA
case r == 'Z':
state = ST_DIGITDASHTZ
}
case ST_DIGITDASHTZ:
if unicode.IsDigit(r) {
state = ST_DIGITDASHTZDIGIT
}
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"):
if t, err := time.Parse("02 Jan 2006, 15:04", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
case len(datestr) == len("02 Jan 2006, 15:04:05"):
if t, err := time.Parse("02 Jan 2006, 15:04:05", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
default:
}
case ST_ALPHA: // starts alpha
// May 8, 2009 5:57:51 PM
// Mon Jan _2 15:04:05 2006
// Mon Jan _2 15:04:05 MST 2006
// Mon Jan 02 15:04:05 -0700 2006
// Monday, 02-Jan-06 15:04:05 MST
// Monday, 02 Jan 2006 15:04:05 -0700
// Mon, 02 Jan 2006 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 -0700
// 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) {
continue
}
switch {
case r == ' ':
state = ST_ALPHAWS
case r == ',':
switch {
case weekdays[datestr[:i]] == true:
state = ST_WEEKDAYCOMMA
case weekdayAbbrev[datestr[:i]] == true:
state = ST_WEEKDAYABBREVCOMMA
default:
state = ST_MONTHCOMMA
}
}
case ST_WEEKDAYCOMMA: // Starts alpha then comma
// Monday, 02-Jan-06 15:04:05 MST
// Monday, 02 Jan 2006 15:04:05 -0700
switch {
case r == '-':
if i < 15 {
t, err := time.Parse("Monday, 02-Jan-06 15:04:05 MST", datestr)
if err == nil {
return t, nil
}
return time.Time{}, err
} else {
t, err := time.Parse("Monday, 02 Jan 2006 15:04:05 -0700", datestr)
if err == nil {
return t, nil
}
return time.Time{}, err
}
}
case ST_WEEKDAYABBREVCOMMA: // Starts alpha then comma
// Mon, 02-Jan-06 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 -0700
switch {
case r == '-':
if i < 15 {
t, err := time.Parse("Mon, 02-Jan-06 15:04:05 MST", datestr)
if err == nil {
return t, nil
}
return time.Time{}, err
} else {
t, err := time.Parse("Mon, 02 Jan 2006 15:04:05 -0700", datestr)
if err == nil {
return t, nil
}
return time.Time{}, err
}
}
case ST_ALPHAWS: // Starts alpha then whitespace
// May 8, 2009 5:57:51 PM
// 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 r == ' ':
// state = ST_ALPHAWSWS
case r == ',':
state = ST_ALPHAWSCOMMA
case unicode.IsLetter(r):
state = ST_ALPHAWSALPHA
}
case ST_ALPHACOMMA: // Starts alpha then comma
// Mon, 02 Jan 2006 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 -0700
switch {
case r == '-':
state = ST_ALPHACOMMADASH
}
case ST_ALPHACOMMADASH: // Starts alpha then comma and one dash
// Mon, 02 Jan 2006 15:04:05 -0700
switch {
case r == '-':
state = ST_ALPHACOMMADASHDASH
}
case ST_ALPHAWSCOMMA: // Starts Alpha, whitespace, digit, comma
// May 8, 2009 5:57:51 PM
t, err := time.Parse("Jan 2, 2006 3:04:05 PM", datestr)
if err == nil {
return t, nil
}
return time.Time{}, err
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
// 13980450781991351 nanoseconds
// 13980450781991 microseconds
// 1384216367189
// 1332151919 seconds
// 20140601 yyyymmdd
// 2014 yyyy
if len(datestr) >= len("13980450781991351") {
if nanoSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(0, nanoSecs), nil
} else {
return time.Time{}, err
}
} else if len(datestr) >= len("13980450781991") {
if microSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(0, microSecs*1000), nil
} else {
return time.Time{}, err
}
} else if len(datestr) >= len("1384216367189") {
if miliSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(0, miliSecs*1000*1000), nil
} else {
return time.Time{}, err
}
} else if len(datestr) == len("20140601") {
if t, err := time.Parse("20060102", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
} else if len(datestr) == len("2014") {
if t, err := time.Parse("2006", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
} else {
if secs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(secs, 0), nil
} else {
return time.Time{}, err
}
}
case ST_DIGITDASH: // starts digit then dash 02-
// 2006-01-02
// 2006-01
if len(datestr) == len("2014-04-26") {
if t, err := time.Parse("2006-01-02", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
} else if len(datestr) == len("2014-04") {
if t, err := time.Parse("2006-01", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
}
case ST_DIGITDASHTDELTA:
// 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
if t, err := time.Parse("2006-01-02T15:04:05-07:00", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_DIGITDASHTZDIGIT:
// With a time-zone at end after Z
// 2006-01-02T15:04:05.999999999Z07:00
// 2006-01-02T15:04:05Z07:00
if len(datestr) == len("2006-01-02T15:04:05Z07:00") {
if t, err := time.Parse("2006-01-02T15:04:05Z07:00", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
}
case ST_DIGITDASHT: // starts digit then dash 02- then T
// 2006-01-02T15:04:05.999999
// 2006-01-02T15:04:05.999999
if t, err := time.Parse("2006-01-02T15:04:05", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
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
if t, err := time.Parse("2006-01-02T15:04:05Z", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_DIGITDASHWS: // starts digit then dash 02- then whitespace 1 << 2 << 5 + 3
// 2013-04-01 22:43:22
var t time.Time
var err error
switch len(datestr) {
case len("2006-01-02 15:04:05"):
t, err = time.Parse("2006-01-02 15:04:05", datestr)
case len("2006-01-02 15:04:05 -0700"):
t, err = time.Parse("2006-01-02 15:04:05 -0700", datestr)
case len("2006-01-02 15:04:05 -07:00"):
t, err = time.Parse("2006-01-02 15:04:05 -07:00", datestr)
}
return t, err
case ST_DIGITDASHWSALPHA: // starts digit then dash 02- then whitespace 1 << 2 << 5 + 3
// 2014-12-16 06:20:00 UTC
// 2015-02-18 00:12:00 +0000 UTC
// 2015-06-25 01:25:37.115208593 +0000 UTC
var t time.Time
var err error
switch len(datestr) {
case len("2006-01-02 15:04:05 UTC"):
t, err = time.Parse("2006-01-02 15:04:05 UTC", datestr)
if err != nil {
t, err = time.Parse("2006-01-02 15:04:05 GMT", datestr)
}
case len("2015-02-18 00:12:00 +0000 UTC"):
t, err = time.Parse("2006-01-02 15:04:05 -0700 UTC", datestr)
if err != nil {
t, err = time.Parse("2006-01-02 15:04:05 -0700 GMT", datestr)
}
}
if err == nil {
return t, nil
} else {
return time.Time{}, err
}
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
if t, err := time.Parse("2006-01-02 15:04:05", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
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
t, err := time.Parse("2006-01-02 15:04:05 UTC", datestr)
if err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_DIGITDASHWSDOTPLUS:
// 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
t, err := time.Parse("2006-01-02 15:04:05 -0700", datestr)
if err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_DIGITDASHWSDOTPLUSALPHA:
// 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
t, err := time.Parse("2006-01-02 15:04:05 -0700 UTC", datestr)
if err == nil {
return t, nil
}
t, err = time.Parse("2006-01-02 15:04:05 -0700 GMT", datestr)
if err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_ALPHAWSALPHACOLON:
// Mon Jan _2 15:04:05 2006
if t, err := time.Parse(time.ANSIC, datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_ALPHAWSALPHACOLONOFFSET:
// Mon Jan 02 15:04:05 -0700 2006
if t, err := time.Parse(time.RubyDate, datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_ALPHAWSALPHACOLONALPHA:
// Mon Jan _2 15:04:05 MST 2006
if t, err := time.Parse(time.UnixDate, datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_ALPHAWSALPHACOLONALPHAOFFSET:
// Mon Aug 10 15:44:11 UTC+0100 2015
if t, err := time.Parse("Mon Jan 02 15:04:05 MST-0700 2006", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
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]
if t, err := time.Parse("Mon Jan 02 2006 15:04:05 MST-0700", dateTmp); err == nil {
return t, nil
} else {
return time.Time{}, err
}
}
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") {
if t, err := time.Parse("2006/01/02", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
} else {
if t, err := time.Parse("2006/1/2", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
}
} else {
for _, parseFormat := range shortDates {
if t, err := time.Parse(parseFormat, datestr); err == nil {
return t, nil
}
}
return time.Time{}, fmt.Errorf("Unrecognized dateformat: %v", datestr)
}
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
var t time.Time
var err error
if firstSlash == 4 {
switch len(datestr) {
case len("2006/01/02 15:04"):
t, err = time.Parse("2006/01/02 15:04", datestr)
case len("2006/01/2 15:04"):
if t, err = time.Parse("2006/01/2 15:04", datestr); err != nil {
t, err = time.Parse("2006/1/02 15:04", datestr)
} else if t, err = time.Parse("2006/1/02 15:04", datestr); err != nil {
t, err = time.Parse("2006/1/02 15:04", datestr)
}
default:
t, err = time.Parse("2006/1/2 15:04", datestr)
}
} else {
switch len(datestr) {
case len("01/02/2006 15:04"):
t, err = time.Parse("01/02/2006 15:04", datestr)
case len("01/2/2006 15:04"):
if t, err = time.Parse("01/2/2006 15:04", datestr); err != nil {
t, err = time.Parse("1/02/2006 15:04", datestr)
} else if t, err = time.Parse("1/02/2006 15:04", datestr); err != nil {
t, err = time.Parse("1/02/2006 15:04", datestr)
}
default:
t, err = time.Parse("1/2/2006 15:04", datestr)
}
}
if err == nil {
return t, nil
}
return time.Time{}, err
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
// 2014/4/8 22:05 PM
// 2014/04/08 22:05 PM
var t time.Time
var err error
if firstSlash == 4 {
switch len(datestr) {
case len("2006/01/02 15:04 PM"):
t, err = time.Parse("2006/01/02 03:04 PM", datestr)
case len("2006/01/2 15:04 PM"):
if t, err = time.Parse("2006/01/2 03:04 PM", datestr); err != nil {
t, err = time.Parse("2006/1/02 03:04 PM", datestr)
}
default:
t, err = time.Parse("2006/1/2 03:04 PM", datestr)
}
} else {
switch len(datestr) {
case len("01/02/2006 15:04 PM"):
t, err = time.Parse("01/02/2006 03:04 PM", datestr)
case len("01/2/2006 15:04 PM"):
if t, err = time.Parse("01/2/2006 03:04 PM", datestr); err != nil {
t, err = time.Parse("1/02/2006 03:04 PM", datestr)
}
default:
t, err = time.Parse("1/2/2006 3:04 PM", datestr)
}
}
if err == nil {
return t, nil
}
return time.Time{}, err
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
var t time.Time
var err error
if firstSlash == 4 {
switch len(datestr) {
case len("2014/07/10 06:55:38.156283"):
t, err = time.Parse("2006/01/02 15:04:05.000000", datestr)
case len("2006/01/02 15:04:05"):
t, err = time.Parse("2006/01/02 15:04:05", datestr)
case len("2006/01/2 15:04:05"):
if t, err = time.Parse("2006/01/2 15:04:05", datestr); err != nil {
t, err = time.Parse("2006/1/02 15:04:05", datestr)
}
default:
t, err = time.Parse("2006/1/2 15:04:05", datestr)
}
} else {
switch len(datestr) {
case len("07/10/2014 06:55:38.156283"):
t, err = time.Parse("01/02/2006 15:04:05.000000", datestr)
case len("01/02/2006 15:04:05"):
t, err = time.Parse("01/02/2006 15:04:05", datestr)
case len("01/2/2006 15:04:05"):
if t, err = time.Parse("01/2/2006 15:04:05", datestr); err != nil {
t, err = time.Parse("1/02/2006 15:04:05", datestr)
}
default:
t, err = time.Parse("1/2/2006 15:04:05", datestr)
}
}
if err == nil {
return t, nil
}
return time.Time{}, err
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
var t time.Time
var err error
if firstSlash == 4 {
switch len(datestr) {
case len("2014/07/10 06:55:38.156283 PM"):
t, err = time.Parse("2006/01/02 03:04:05.000000 PM", datestr)
case len("2006/01/02 15:04:05 PM"):
t, err = time.Parse("2006/01/02 03:04:05 PM", datestr)
case len("2006/01/2 15:04:05 PM"):
if t, err = time.Parse("2006/01/2 03:04:05 PM", datestr); err != nil {
t, err = time.Parse("2006/1/02 03:04:05 PM", datestr)
}
default:
t, err = time.Parse("2006/1/2 03:04:05 PM", datestr)
}
} else {
switch len(datestr) {
case len("07/10/2014 06:55:38.156283 PM"):
t, err = time.Parse("01/02/2006 03:04:05.000000 PM", datestr)
case len("01/02/2006 15:04:05 PM"):
t, err = time.Parse("01/02/2006 03:04:05 PM", datestr)
case len("01/2/2006 15:04:05 PM"):
if t, err = time.Parse("01/2/2006 03:04:05 PM", datestr); err != nil {
t, err = time.Parse("1/02/2006 03:04:05 PM", datestr)
}
default:
t, err = time.Parse("1/2/2006 03:04:05 PM", datestr)
}
}
if err == nil {
return t, nil
}
return time.Time{}, err
case ST_WEEKDAYABBREVCOMMA: // Starts alpha then comma
// Mon, 02 Jan 2006 15:04:05 MST
t, err := time.Parse("Mon, 02 Jan 2006 15:04:05 MST", datestr)
if err == nil {
return t, nil
}
return time.Time{}, err
case ST_ALPHACOMMA: // Starts alpha then comma but no DASH
// Mon, 02 Jan 2006 15:04:05 MST
// Jan 2, 2006 3:04:05 PM
if t, err := time.Parse("Jan 2, 2006 3:04:05 PM", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_ALPHACOMMADASH: // Starts alpha then comma and one dash
// Mon, 02 Jan 2006 15:04:05 -0700
//RFC1123Z = "Mon, 02 Jan 2006 15:04:05 -0700" // RFC1123 with numeric zone
// TODO: this doesn't work???
if t, err := time.Parse(time.RFC1123Z, datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
case ST_ALPHACOMMADASHDASH: // Starts alpha then comma and two dash'es
// Monday, 02-Jan-06 15:04:05 MST
if t, err := time.Parse("Monday, 02-Jan-06 15:04:05 MST", datestr); err == nil {
return t, nil
} else {
return time.Time{}, err
}
}
return time.Time{}, fmt.Errorf("Could not find date format for %s", datestr)
}
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