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b0e7f69efa
dateparse/parseany.go
Aaron Raddon b0e7f69efa allow golangs wierd m=+0.00000 offset closes #57
2018-04-17 14:16:01 -07:00

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// Package dateparse parses date-strings without knowing the format
// in advance, using a fast lex based approach to eliminate shotgun
// attempts. It leans towards US style dates when there is a conflict.
package dateparse
import (
"fmt"
"strconv"
"time"
"unicode"
"unicode/utf8"
)
// func init() {
// gou.SetupLogging("debug")
// gou.SetColorOutput()
// }
type dateState uint8
type timeState uint8
const (
dateStart dateState = iota
dateDigit
dateDigitDash
dateDigitDashDash
dateDigitDashDashWs
dateDigitDashDashT
dateDigitDashDashAlpha
dateDigitDot
dateDigitDotDot
dateDigitSlash
dateDigitChineseYear
dateDigitChineseYearWs
dateDigitWs
dateDigitWsMoYear
dateDigitWsMolong
dateAlpha
dateAlphaWs
dateAlphaWsDigit
dateAlphaWsDigitComma
dateAlphaWsDigitCommaWs
dateAlphaWsDigitCommaWsYear
dateAlphaWsAlpha
dateAlphaWsAlphaYearmaybe
dateWeekdayComma
dateWeekdayAbbrevComma
//dateWeekdayAbbrevCommaDash
)
const (
// Time state
timeIgnore timeState = iota // 0
timeStart
timeWs
timeWsAlpha
timeWsAlphaWs
timeWsAlphaZoneOffset // 5
timeWsAlphaZoneOffsetWs
timeWsAlphaZoneOffsetWsYear
timeWsAlphaZoneOffsetWsExtra
timeWsAMPMMaybe
timeWsAMPM // 10
timeWsOffset
timeWsOffsetWs // 12
timeWsOffsetColonAlpha
timeWsOffsetColon
timeWsYear // 15
timeOffset
timeOffsetColon
timeAlpha
timePeriod
timePeriodOffset // 20
timePeriodOffsetColon
timePeriodOffsetColonWs
timePeriodWs
timePeriodWsAlpha
timePeriodWsOffset // 25
timePeriodWsOffsetWs
timePeriodWsOffsetWsAlpha
timePeriodWsOffsetColon
timePeriodWsOffsetColonAlpha
timeZ
timeZDigit
)
var (
ErrAmbiguousMMDD = fmt.Errorf("This date has ambiguous mm/dd vs dd/mm type format")
)
// ParseAny parse an unknown date format, detect the layout.
// Normal parse. Equivalent Timezone rules as time.Parse().
// NOTE: please see readme on mmdd vs ddmm ambiguous dates.
func ParseAny(datestr string) (time.Time, error) {
p, err := parseTime(datestr, nil)
if err != nil {
return time.Time{}, err
}
return p.parse()
}
// 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) {
p, err := parseTime(datestr, loc)
if err != nil {
return time.Time{}, err
}
return p.parse()
}
// 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) {
p, err := parseTime(datestr, time.Local)
if err != nil {
return time.Time{}, err
}
return p.parse()
}
// 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 {
p, err := parseTime(datestr, nil)
if err != nil {
panic(err.Error())
}
t, err := p.parse()
if err != nil {
panic(err.Error())
}
return t
}
// ParseFormat parse's an unknown date-time string and returns a layout
// string that can parse this (and exact same format) other date-time strings.
//
// layout, err := dateparse.ParseFormat("2013-02-01 00:00:00")
// // layout = "2006-01-02 15:04:05"
//
func ParseFormat(datestr string) (string, error) {
p, err := parseTime(datestr, nil)
if err != nil {
return "", err
}
_, err = p.parse()
if err != nil {
return "", err
}
return string(p.format), nil
}
// ParseStrict parse an unknown date format. IF the date is ambigous
// mm/dd vs dd/mm then return an error. These return errors: 3.3.2014 , 8/8/71 etc
func ParseStrict(datestr string) (time.Time, error) {
p, err := parseTime(datestr, nil)
if err != nil {
return time.Time{}, err
}
if p.ambiguousMD {
return time.Time{}, ErrAmbiguousMMDD
}
return p.parse()
}
type parser struct {
loc *time.Location
preferMonthFirst bool
ambiguousMD bool
stateDate dateState
stateTime timeState
format []byte
datestr string
skip int
extra int
part1Len int
yeari int
yearlen int
moi int
molen int
dayi int
daylen int
houri int
hourlen int
mini int
minlen int
seci int
seclen int
msi int
mslen int
offseti int
offsetlen int
tzi int
tzlen int
t *time.Time
}
func newParser(dateStr string, loc *time.Location) *parser {
p := parser{
stateDate: dateStart,
stateTime: timeIgnore,
datestr: dateStr,
loc: loc,
preferMonthFirst: true,
}
p.format = []byte(dateStr)
return &p
}
func (p *parser) set(start int, val string) {
if start < 0 {
return
}
if len(p.format) < start+len(val) {
return
}
for i, r := range val {
p.format[start+i] = byte(r)
}
}
func (p *parser) setMonth() {
if p.molen == 2 {
p.set(p.moi, "01")
} else if p.molen == 1 {
p.set(p.moi, "1")
}
}
func (p *parser) setDay() {
if p.daylen == 2 {
p.set(p.dayi, "02")
} else if p.daylen == 1 {
p.set(p.dayi, "2")
}
}
func (p *parser) setYear() {
if p.yearlen == 2 {
p.set(p.yeari, "06")
} else if p.yearlen == 4 {
p.set(p.yeari, "2006")
}
}
func (p *parser) coalesceDate(end int) {
if p.yeari > 0 {
if p.yearlen == 0 {
p.yearlen = end - p.yeari
}
p.setYear()
}
if p.moi > 0 && p.molen == 0 {
p.molen = end - p.moi
p.setMonth()
}
if p.dayi > 0 && p.daylen == 0 {
p.daylen = end - p.dayi
p.setDay()
}
}
func (p *parser) ts() string {
return fmt.Sprintf("h:(%d:%d) m:(%d:%d) s:(%d:%d)", p.houri, p.hourlen, p.mini, p.minlen, p.seci, p.seclen)
}
func (p *parser) ds() string {
return fmt.Sprintf("%s d:(%d:%d) m:(%d:%d) y:(%d:%d)", p.datestr, p.dayi, p.daylen, p.moi, p.molen, p.yeari, p.yearlen)
}
func (p *parser) coalesceTime(end int) {
// 03:04:05
// 15:04:05
// 3:04:05
// 3:4:5
// 15:04:05.00
if p.houri > 0 {
if p.hourlen == 2 {
p.set(p.houri, "15")
} else if p.hourlen == 1 {
p.set(p.houri, "3")
}
}
if p.mini > 0 {
if p.minlen == 0 {
p.minlen = end - p.mini
}
if p.minlen == 2 {
p.set(p.mini, "04")
} else {
p.set(p.mini, "4")
}
}
if p.seci > 0 {
if p.seclen == 0 {
p.seclen = end - p.seci
}
if p.seclen == 2 {
p.set(p.seci, "05")
} else {
p.set(p.seci, "5")
}
}
if p.msi > 0 {
for i := 0; i < p.mslen; i++ {
p.format[p.msi+i] = '0'
}
}
}
func (p *parser) trimExtra() {
if p.extra > 0 && len(p.format) > p.extra {
p.format = p.format[0:p.extra]
p.datestr = p.datestr[0:p.extra]
}
}
func (p *parser) parse() (time.Time, error) {
if p.t != nil {
return *p.t, nil
}
if p.skip > 0 && len(p.format) > p.skip {
p.format = p.format[p.skip:]
p.datestr = p.datestr[p.skip:]
}
//gou.Debugf("parse %q AS %s", p.datestr, string(p.format))
if p.loc == nil {
return time.Parse(string(p.format), p.datestr)
}
return time.ParseInLocation(string(p.format), p.datestr, p.loc)
}
func parseTime(datestr string, loc *time.Location) (*parser, error) {
p := newParser(datestr, loc)
i := 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 < len(datestr); i++ {
//r := rune(datestr[i])
r, bytesConsumed := utf8.DecodeRuneInString(datestr[i:])
if bytesConsumed > 1 {
i += (bytesConsumed - 1)
}
switch p.stateDate {
case dateStart:
if unicode.IsDigit(r) {
p.stateDate = dateDigit
} else if unicode.IsLetter(r) {
p.stateDate = dateAlpha
} else {
return nil, fmt.Errorf("unrecognized first character '%s' in %v", string(r), datestr)
}
case dateDigit:
switch r {
case '-', '\u2212':
// 2006-01-02
// 2006-01-02T15:04:05Z07:00
// 13-Feb-03
// 2013-Feb-03
p.stateDate = dateDigitDash
p.yeari = 0
p.yearlen = i
p.moi = i + 1
if i == 4 {
p.set(0, "2006")
}
case '/':
// 03/31/2005
// 2014/02/24
p.stateDate = dateDigitSlash
if i == 4 {
p.yearlen = i
p.moi = i + 1
p.setYear()
} else {
p.ambiguousMD = true
if p.preferMonthFirst {
if p.molen == 0 {
p.molen = i
p.setMonth()
p.dayi = i + 1
}
}
}
case '.':
// 3.31.2014
p.ambiguousMD = true
p.moi = 0
p.molen = i
p.setMonth()
p.dayi = i + 1
p.stateDate = dateDigitDot
case ' ':
// 18 January 2018
// 8 January 2018
// 8 jan 2018
// 02 Jan 2018 23:59
// 02 Jan 2018 23:59:34
// 12 Feb 2006, 19:17
// 12 Feb 2006, 19:17:22
p.stateDate = dateDigitWs
p.dayi = 0
p.daylen = i
case '年':
// Chinese Year
p.stateDate = dateDigitChineseYear
default:
//if unicode.IsDigit(r) {
continue
}
p.part1Len = i
case dateDigitDash:
// 2006-01
// 2006-01-02
// dateDigitDashDashT
// 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
// dateDigitDashDashWs
// 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
// 2013-04-01 22:43:22
// 2014-04-26 05:24:37 PM
// dateDigitDashDashAlpha
// 2013-Feb-03
// 13-Feb-03
switch r {
case '-':
p.molen = i - p.moi
p.dayi = i + 1
p.stateDate = dateDigitDashDash
p.setMonth()
default:
if unicode.IsDigit(r) {
//continue
} else if unicode.IsLetter(r) {
p.stateDate = dateDigitDashDashAlpha
}
}
case dateDigitDashDash:
// 2006-01-02
// dateDigitDashDashT
// 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
// dateDigitDashDashWs
// 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
// 2013-04-01 22:43:22
// 2014-04-26 05:24:37 PM
switch r {
case ' ':
p.daylen = i - p.dayi
p.stateDate = dateDigitDashDashWs
p.stateTime = timeStart
p.setDay()
break iterRunes
case 'T':
p.daylen = i - p.dayi
p.stateDate = dateDigitDashDashT
p.stateTime = timeStart
p.setDay()
break iterRunes
}
case dateDigitDashDashAlpha:
// 2013-Feb-03
// 13-Feb-03
switch r {
case '-':
p.molen = i - p.moi
p.set(p.moi, "Jan")
p.dayi = i + 1
}
case dateDigitSlash:
// 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
switch r {
case ' ':
p.stateTime = timeStart
if p.yearlen == 0 {
p.yearlen = i - p.yeari
p.setYear()
} else if p.daylen == 0 {
p.daylen = i - p.dayi
p.setDay()
}
break iterRunes
case '/':
if p.yearlen > 0 {
// 2014/07/10 06:55:38.156283
if p.molen == 0 {
p.molen = i - p.moi
p.setMonth()
p.dayi = i + 1
}
} else if p.preferMonthFirst {
if p.daylen == 0 {
p.daylen = i - p.dayi
p.setDay()
p.yeari = i + 1
}
}
}
case dateDigitWs:
// 18 January 2018
// 8 January 2018
// 8 jan 2018
// 1 jan 18
// 02 Jan 2018 23:59
// 02 Jan 2018 23:59:34
// 12 Feb 2006, 19:17
// 12 Feb 2006, 19:17:22
switch r {
case ' ':
p.yeari = i + 1
//p.yearlen = 4
p.dayi = 0
p.daylen = p.part1Len
p.setDay()
p.stateTime = timeStart
if i <= len("12 Feb") {
p.moi = p.daylen + 1
p.molen = 3
p.set(p.moi, "Jan")
p.stateDate = dateDigitWsMoYear
} else {
p.stateDate = dateDigitWsMolong
}
}
case dateDigitWsMoYear:
// 8 jan 2018
// 02 Jan 2018 23:59
// 02 Jan 2018 23:59:34
// 12 Feb 2006, 19:17
// 12 Feb 2006, 19:17:22
switch r {
case ',':
p.yearlen = i - p.yeari
p.setYear()
i++
break iterRunes
case ' ':
p.yearlen = i - p.yeari
p.setYear()
break iterRunes
}
case dateDigitWsMolong:
// 18 January 2018
// 8 January 2018
case dateDigitChineseYear:
// dateDigitChineseYear
// 2014年04月08日
// weekday %Y年%m月%e日 %A %I:%M %p
// 2013年07月18日 星期四 10:27 上午
if r == ' ' {
p.stateDate = dateDigitChineseYearWs
break
}
case dateDigitDot:
// 3.31.2014
if r == '.' {
p.daylen = i - p.dayi
p.yeari = i + 1
p.setDay()
p.stateDate = dateDigitDotDot
}
case dateDigitDotDot:
// iterate all the way through
case dateAlpha:
// dateAlphaWS
// 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)
// dateAlphaWSDigit
// May 8, 2009 5:57:51 PM
// oct 1, 1970
//
// dateWeekdayComma
// Monday, 02 Jan 2006 15:04:05 MST
// Monday, 02-Jan-06 15:04:05 MST
// Monday, 02 Jan 2006 15:04:05 -0700
// Monday, 02 Jan 2006 15:04:05 +0100
// dateWeekdayAbbrevComma
// Mon, 02 Jan 2006 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
// Mon, 02-Jan-06 15:04:05 MST
switch {
case r == ' ':
if i > 4 {
// September 17, 2012 at 5:00pm UTC-05
// This one doesn't follow standard parse methodologies. the "January"
// is difficult to use the format string replace method because of its variable-length (march, june)
// so we just use this format here. If we see more similar to this we will do something else.
p.format = []byte("January 02, 2006 at 3:04pm MST-07")
return p, nil
}
p.stateDate = dateAlphaWs
case r == ',':
// p.moi = 0
// p.molen = i
if i == 3 {
p.stateDate = dateWeekdayAbbrevComma
p.set(0, "Mon")
} else {
p.stateDate = dateWeekdayComma
//p.set(0, "Monday")
p.skip = i + 2
i++
// TODO: lets just make this "skip" as we don't need
// the mon, monday, they are all superfelous and not needed
// just lay down the skip, no need to fill and then skip
}
}
case dateWeekdayComma:
// Monday, 02 Jan 2006 15:04:05 MST
// Monday, 02 Jan 2006 15:04:05 -0700
// Monday, 02 Jan 2006 15:04:05 +0100
// Monday, 02-Jan-06 15:04:05 MST
if p.dayi == 0 {
p.dayi = i
}
switch r {
case ' ', '-':
if p.moi == 0 {
p.moi = i + 1
p.daylen = i - p.dayi
p.setDay()
} else if p.yeari == 0 {
p.yeari = i + 1
p.molen = i - p.moi
p.set(p.moi, "Jan")
} else {
p.stateTime = timeStart
break iterRunes
}
}
case dateWeekdayAbbrevComma:
// Mon, 02 Jan 2006 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
// Thu, 4 Jan 2018 17:53:36 +0000
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
// Mon, 02-Jan-06 15:04:05 MST
switch r {
case ' ', '-':
if p.dayi == 0 {
p.dayi = i + 1
} else if p.moi == 0 {
p.daylen = i - p.dayi
p.setDay()
p.moi = i + 1
} else if p.yeari == 0 {
p.molen = i - p.moi
p.set(p.moi, "Jan")
p.yeari = i + 1
} else {
p.yearlen = i - p.yeari
p.setYear()
p.stateTime = timeStart
break iterRunes
}
}
case dateAlphaWs:
// dateAlphaWsAlpha
// 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
// dateAlphaWsDigit
// May 8, 2009 5:57:51 PM
// oct 1, 1970
// oct 7, '70
switch {
case unicode.IsLetter(r):
p.set(0, "Mon")
p.stateDate = dateAlphaWsAlpha
//p.moi = i
p.set(i, "Jan")
case unicode.IsDigit(r):
p.set(0, "Jan")
p.stateDate = dateAlphaWsDigit
p.dayi = i
}
case dateAlphaWsDigit:
// May 8, 2009 5:57:51 PM
// oct 1, 1970
// oct 7, '70
//gou.Debugf("%d %s dateAlphaWsDigit %s %s", i, string(r), p.ds(), p.ts())
if r == ',' {
p.daylen = i - p.dayi
p.setDay()
p.stateDate = dateAlphaWsDigitComma
}
case dateAlphaWsDigitComma:
// x
// May 8, 2009 5:57:51 PM
// oct 1, 1970
// oct 7, '70
if r == ' ' {
p.stateDate = dateAlphaWsDigitCommaWs
p.yeari = i + 1
}
case dateAlphaWsDigitCommaWs:
// x
// May 8, 2009 5:57:51 PM
// oct 1, 1970
// oct 7, '70
switch r {
case '\'':
p.yeari = i + 1
case ' ':
p.stateDate = dateAlphaWsDigitCommaWsYear
p.yearlen = i - p.yeari
p.setYear()
p.stateTime = timeStart
break iterRunes
}
case dateAlphaWsAlpha:
// 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 == ' ' {
if p.dayi > 0 {
p.daylen = i - p.dayi
p.setDay()
p.yeari = i + 1
p.stateDate = dateAlphaWsAlphaYearmaybe
p.stateTime = timeStart
}
} else if unicode.IsDigit(r) {
if p.dayi == 0 {
p.dayi = i
}
}
case dateAlphaWsAlphaYearmaybe:
// x
// Mon Jan _2 15:04:05 2006
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
if r == ':' {
i = i - 3
p.stateDate = dateAlphaWsAlpha
p.yeari = 0
break iterRunes
} else if r == ' ' {
// must be year format, not 15:04
p.yearlen = i - p.yeari
p.setYear()
break iterRunes
}
default:
break iterRunes
}
}
p.coalesceDate(i)
if p.stateTime == timeStart {
// increment first one, since the i++ occurs at end of loop
if i < len(p.datestr) {
i++
}
// ensure we skip any whitespace prefix
for ; i < len(datestr); i++ {
r := rune(datestr[i])
if r != ' ' {
break
}
}
iterTimeRunes:
for ; i < len(datestr); i++ {
r := rune(datestr[i])
//gou.Debugf("%d %s %d iterTimeRunes %s %s", i, string(r), p.stateTime, p.ds(), p.ts())
switch p.stateTime {
case timeStart:
// 22:43:22
// 22:43
// timeComma
// 08:20:13,787
// timeWs
// 05:24:37 PM
// 06:20:00 UTC
// 00:12:00 +0000 UTC
// 22:18:00 +0000 UTC m=+0.000000001
// 15:04:05 -0700
// 15:04:05 -07:00
// 15:04:05 2008
// timeOffset
// 03:21:51+00:00
// 19:55:00+0100
// timePeriod
// 17:24:37.3186369
// 00:07:31.945167
// 18:31:59.257000000
// 00:00:00.000
// timePeriodOffset
// 19:55:00.799+0100
// timePeriodOffsetColon
// 15:04:05.999-07:00
// timePeriodWs
// timePeriodWsOffset
// 00:07:31.945167 +0000
// 00:00:00.000 +0000
// timePeriodWsOffsetAlpha
// 00:07:31.945167 +0000 UTC
// 22:18:00.001 +0000 UTC m=+0.000000001
// 00:00:00.000 +0000 UTC
// timePeriodWsAlpha
// 06:20:00.000 UTC
if p.houri == 0 {
p.houri = i
}
switch r {
case ',':
// hm, lets just swap out comma for period. for some reason go
// won't parse it.
// 2014-05-11 08:20:13,787
ds := []byte(p.datestr)
ds[i] = '.'
return parseTime(string(ds), loc)
case '-', '+':
// 03:21:51+00:00
p.stateTime = timeOffset
if p.seci == 0 {
// 22:18+0530
p.minlen = i - p.mini
} else {
p.seclen = i - p.seci
}
p.offseti = i
case '.':
p.stateTime = timePeriod
p.seclen = i - p.seci
p.msi = i + 1
case 'Z':
p.stateTime = timeZ
if p.seci == 0 {
p.minlen = i - p.mini
} else {
p.seclen = i - p.seci
}
case ' ':
p.coalesceTime(i)
p.stateTime = timeWs
case ':':
if p.mini == 0 {
p.mini = i + 1
p.hourlen = i - p.houri
} else if p.seci == 0 {
p.seci = i + 1
p.minlen = i - p.mini
}
}
case timeOffset:
// 19:55:00+0100
// timeOffsetColon
// 15:04:05+07:00
// 15:04:05-07:00
if r == ':' {
p.stateTime = timeOffsetColon
}
case timeWs:
// timeWsAlpha
// 06:20:00 UTC
// 15:44:11 UTC+0100 2015
// 18:04:07 GMT+0100 (GMT Daylight Time)
// 17:57:51 MST 2009
// timeWsAMPMMaybe
// 05:24:37 PM
// timeWsOffset
// 15:04:05 -0700
// 00:12:00 +0000 UTC
// timeWsOffsetColon
// 15:04:05 -07:00
// 17:57:51 -0700 2009
// timeWsOffsetColonAlpha
// 00:12:00 +00:00 UTC
// timeWsYear
// 00:12:00 2008
// timeZ
// 15:04:05.99Z
switch r {
case 'A', 'P':
// Could be AM/PM or could be PST or similar
p.tzi = i
p.stateTime = timeWsAMPMMaybe
case '+', '-':
p.offseti = i
p.stateTime = timeWsOffset
default:
if unicode.IsLetter(r) {
// 06:20:00 UTC
// 15:44:11 UTC+0100 2015
// 17:57:51 MST 2009
p.tzi = i
p.stateTime = timeWsAlpha
//break iterTimeRunes
} else if unicode.IsDigit(r) {
// 00:12:00 2008
p.stateTime = timeWsYear
p.yeari = i
}
}
case timeWsAlpha:
// 06:20:00 UTC
// timeWsAlphaWs
// 17:57:51 MST 2009
// timeWsAlphaZoneOffset
// timeWsAlphaZoneOffsetWs
// timeWsAlphaZoneOffsetWsExtra
// 18:04:07 GMT+0100 (GMT Daylight Time)
// timeWsAlphaZoneOffsetWsYear
// 15:44:11 UTC+0100 2015
switch r {
case '+', '-':
p.tzlen = i - p.tzi
if p.tzlen == 4 {
p.set(p.tzi, " MST")
} else if p.tzlen == 3 {
p.set(p.tzi, "MST")
}
p.stateTime = timeWsAlphaZoneOffset
p.offseti = i
case ' ':
// 17:57:51 MST 2009
p.stateTime = timeWsAlphaWs
p.yeari = i + 1
}
case timeWsAlphaWs:
// 17:57:51 MST 2009
case timeWsAlphaZoneOffset:
// timeWsAlphaZoneOffset
// timeWsAlphaZoneOffsetWs
// timeWsAlphaZoneOffsetWsExtra
// 18:04:07 GMT+0100 (GMT Daylight Time)
// timeWsAlphaZoneOffsetWsYear
// 15:44:11 UTC+0100 2015
switch r {
case ' ':
p.set(p.offseti, "-0700")
p.yeari = i + 1
p.stateTime = timeWsAlphaZoneOffsetWs
}
case timeWsAlphaZoneOffsetWs:
// timeWsAlphaZoneOffsetWs
// timeWsAlphaZoneOffsetWsExtra
// 18:04:07 GMT+0100 (GMT Daylight Time)
// timeWsAlphaZoneOffsetWsYear
// 15:44:11 UTC+0100 2015
if unicode.IsDigit(r) {
p.stateTime = timeWsAlphaZoneOffsetWsYear
} else {
p.extra = i - 1
p.stateTime = timeWsAlphaZoneOffsetWsExtra
}
case timeWsAlphaZoneOffsetWsYear:
// 15:44:11 UTC+0100 2015
if unicode.IsDigit(r) {
p.yearlen = i - p.yeari + 1
if p.yearlen == 4 {
p.setYear()
}
}
case timeWsAMPMMaybe:
// timeWsAMPMMaybe
// timeWsAMPM
// 05:24:37 PM
// timeWsAlpha
// 00:12:00 PST
// 15:44:11 UTC+0100 2015
if r == 'M' {
//return parse("2006-01-02 03:04:05 PM", datestr, loc)
p.stateTime = timeWsAMPM
p.set(i-1, "PM")
if p.hourlen == 2 {
p.set(p.houri, "03")
} else if p.hourlen == 1 {
p.set(p.houri, "3")
}
} else {
p.stateTime = timeWsAlpha
}
case timeWsOffset:
// timeWsOffset
// 15:04:05 -0700
// timeWsOffsetWs
// 17:57:51 -0700 2009
// 00:12:00 +0000 UTC
// timeWsOffsetColon
// 15:04:05 -07:00
// timeWsOffsetColonAlpha
// 00:12:00 +00:00 UTC
switch r {
case ':':
p.stateTime = timeWsOffsetColon
case ' ':
p.set(p.offseti, "-0700")
p.yeari = i + 1
p.stateTime = timeWsOffsetWs
}
case timeWsOffsetWs:
// 17:57:51 -0700 2009
// 00:12:00 +0000 UTC
// 22:18:00.001 +0000 UTC m=+0.000000001
switch {
case unicode.IsDigit(r):
p.yearlen = i - p.yeari + 1
if p.yearlen == 4 {
p.setYear()
}
case unicode.IsLetter(r):
if p.tzi == 0 {
p.tzi = i
}
case r == '=':
// eff you golang
if datestr[i-1] == 'm' {
p.extra = i - 2
p.trimExtra()
break
}
}
case timeWsOffsetColon:
// timeWsOffsetColon
// 15:04:05 -07:00
// timeWsOffsetColonAlpha
// 2015-02-18 00:12:00 +00:00 UTC
if unicode.IsLetter(r) {
// 2015-02-18 00:12:00 +00:00 UTC
p.stateTime = timeWsOffsetColonAlpha
break iterTimeRunes
}
case timePeriod:
// 15:04:05.999999999+07:00
// 15:04:05.999999999-07:00
// 15:04:05.999999+07:00
// 15:04:05.999999-07:00
// 15:04:05.999+07:00
// 15:04:05.999-07:00
// timePeriod
// 17:24:37.3186369
// 00:07:31.945167
// 18:31:59.257000000
// 00:00:00.000
// timePeriodOffset
// 19:55:00.799+0100
// timePeriodOffsetColon
// 15:04:05.999-07:00
// timePeriodWs
// timePeriodWsOffset
// 00:07:31.945167 +0000
// 00:00:00.000 +0000
// timePeriodWsOffsetAlpha
// 00:07:31.945167 +0000 UTC
// 00:00:00.000 +0000 UTC
// 22:18:00.001 +0000 UTC m=+0.000000001
// timePeriodWsAlpha
// 06:20:00.000 UTC
switch r {
case ' ':
p.mslen = i - p.msi
p.stateTime = timePeriodWs
case '+', '-':
// This really shouldn't happen
p.mslen = i - p.msi
p.offseti = i
p.stateTime = timePeriodOffset
default:
if unicode.IsLetter(r) {
// 06:20:00.000 UTC
p.mslen = i - p.msi
p.stateTime = timePeriodWsAlpha
}
}
case timePeriodOffset:
// timePeriodOffset
// 19:55:00.799+0100
// timePeriodOffsetColon
// 15:04:05.999-07:00
// 13:31:51.999-07:00 MST
if r == ':' {
p.stateTime = timePeriodOffsetColon
}
case timePeriodOffsetColon:
// timePeriodOffset
// timePeriodOffsetColon
// 15:04:05.999-07:00
// 13:31:51.999 -07:00 MST
switch r {
case ' ':
p.set(p.offseti, "-07:00")
p.stateTime = timePeriodOffsetColonWs
p.tzi = i + 1
}
case timePeriodOffsetColonWs:
// continue
case timePeriodWs:
// timePeriodWs
// timePeriodWsOffset
// 00:07:31.945167 +0000
// 00:00:00.000 +0000
// timePeriodWsOffsetAlpha
// 00:07:31.945167 +0000 UTC
// 00:00:00.000 +0000 UTC
// timePeriodWsOffsetColon
// 13:31:51.999 -07:00 MST
// timePeriodWsAlpha
// 06:20:00.000 UTC
if p.offseti == 0 {
p.offseti = i
}
switch r {
case '+', '-':
p.mslen = i - p.msi - 1
p.stateTime = timePeriodWsOffset
default:
if unicode.IsLetter(r) {
// 00:07:31.945167 +0000 UTC
// 00:00:00.000 +0000 UTC
p.stateTime = timePeriodWsOffsetWsAlpha
break iterTimeRunes
}
}
case timePeriodWsOffset:
// timePeriodWs
// timePeriodWsOffset
// 00:07:31.945167 +0000
// 00:00:00.000 +0000
// timePeriodWsOffsetAlpha
// 00:07:31.945167 +0000 UTC
// 00:00:00.000 +0000 UTC
// 03:02:00.001 +0300 MSK m=+0.000000001
// timePeriodWsOffsetColon
// 13:31:51.999 -07:00 MST
// timePeriodWsAlpha
// 06:20:00.000 UTC
switch r {
case ':':
p.stateTime = timePeriodWsOffsetColon
case ' ':
p.set(p.offseti, "-0700")
default:
if unicode.IsLetter(r) {
// 00:07:31.945167 +0000 UTC
// 00:00:00.000 +0000 UTC
// 03:02:00.001 +0300 MSK m=+0.000000001
p.stateTime = timePeriodWsOffsetWsAlpha
}
}
case timePeriodWsOffsetWsAlpha:
// 03:02:00.001 +0300 MSK m=+0.000000001
// eff you golang
if r == '=' && datestr[i-1] == 'm' {
p.extra = i - 2
p.trimExtra()
break
}
case timePeriodWsOffsetColon:
// 13:31:51.999 -07:00 MST
switch r {
case ' ':
p.set(p.offseti, "-07:00")
default:
if unicode.IsLetter(r) {
// 13:31:51.999 -07:00 MST
p.tzi = i
p.stateTime = timePeriodWsOffsetColonAlpha
}
}
case timePeriodWsOffsetColonAlpha:
// continue
case timeZ:
// timeZ
// 15:04:05.99Z
// 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"
if unicode.IsDigit(r) {
p.stateTime = timeZDigit
}
}
}
switch p.stateTime {
case timeWsAlphaWs:
p.yearlen = i - p.yeari
p.setYear()
case timeWsYear:
p.yearlen = i - p.yeari
p.setYear()
case timeWsAlphaZoneOffsetWsExtra:
p.trimExtra()
case timePeriod:
p.mslen = i - p.msi
case timeOffset:
// 19:55:00+0100
p.set(p.offseti, "-0700")
case timeWsOffset:
p.set(p.offseti, "-0700")
case timeWsOffsetWs:
// 17:57:51 -0700 2009
// 00:12:00 +0000 UTC
case timeWsOffsetColon:
// 17:57:51 -07:00
p.set(p.offseti, "-07:00")
case timeOffsetColon:
// 15:04:05+07:00
p.set(p.offseti, "-07:00")
case timePeriodOffset:
// 19:55:00.799+0100
p.set(p.offseti, "-0700")
case timePeriodOffsetColon:
p.set(p.offseti, "-07:00")
case timePeriodWsOffsetColonAlpha:
p.tzlen = i - p.tzi
switch p.tzlen {
case 3:
p.set(p.tzi, "MST")
case 4:
p.set(p.tzi, "MST ")
}
case timePeriodWsOffset:
p.set(p.offseti, "-0700")
}
p.coalesceTime(i)
}
switch p.stateDate {
case dateDigit:
// unixy timestamps ish
// 1499979655583057426 nanoseconds
// 1499979795437000 micro-seconds
// 1499979795437 milliseconds
// 1384216367189
// 1332151919 seconds
// 20140601 yyyymmdd
// 2014 yyyy
t := time.Time{}
if len(datestr) > len("1499979795437000") {
if nanoSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
t = time.Unix(0, nanoSecs)
}
} else if len(datestr) > len("1499979795437") {
if microSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
t = time.Unix(0, microSecs*1000)
}
} else if len(datestr) > len("1332151919") {
if miliSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
t = time.Unix(0, miliSecs*1000*1000)
}
} else if len(datestr) == len("20140601") {
p.format = []byte("20060102")
return p, nil
} else if len(datestr) == len("2014") {
p.format = []byte("2006")
return p, nil
} else if len(datestr) < 4 {
return nil, fmt.Errorf("unrecognized format, to short %v", datestr)
}
if t.IsZero() {
if secs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
if secs > 0 {
// Now, for unix-seconds we aren't going to guess a lot
// nothing before unix-epoch
t = time.Unix(secs, 0)
p.t = &t
}
}
}
if !t.IsZero() {
if loc == nil {
p.t = &t
return p, nil
}
t = t.In(loc)
p.t = &t
return p, nil
}
case dateDigitDash:
// 2006-01
return p, nil
case dateDigitDashDash:
// 2006-01-02
// 2006-1-02
// 2006-1-2
// 2006-01-2
return p, nil
case dateDigitDashDashAlpha:
// 2013-Feb-03
// 2013-Feb-3
p.daylen = i - p.dayi
p.setDay()
return p, nil
case dateDigitDashDashWs: // starts digit then dash 02- then whitespace 1 << 2 << 5 + 3
// 2013-04-01 22:43:22
// 2013-04-01 22:43
return p, nil
case dateDigitDashDashT:
return p, nil
case dateDigitDotDot:
// 03.31.1981
// 3.2.1981
// 3.2.81
p.setYear()
p.yearlen = i - p.yeari
return p, nil
case dateDigitWsMoYear:
// 2 Jan 2018
// 2 Jan 18
// 2 Jan 2018 23:59
// 02 Jan 2018 23:59
// 02 Jan 2018 23:59:45
// 12 Feb 2006, 19:17
// 12 Feb 2006, 19:17:22
return p, nil
case dateDigitWsMolong:
// 18 January 2018
// 8 January 2018
if p.daylen == 2 {
p.format = []byte("02 January 2006")
return p, nil
}
p.format = []byte("2 January 2006")
return p, nil // parse("2 January 2006", datestr, loc)
case dateAlphaWsDigitCommaWs:
// oct 1, 1970
p.yearlen = i - p.yeari
p.setYear()
return p, nil
case dateAlphaWsDigitCommaWsYear:
// May 8, 2009 5:57:51 PM
return p, nil
case dateAlphaWsAlpha:
return p, nil
case dateAlphaWsAlphaYearmaybe:
return p, nil
case dateDigitSlash:
// 3/1/2014
// 10/13/2014
// 01/02/2006
// 2014/10/13
return p, nil
case dateDigitChineseYear:
// dateDigitChineseYear
// 2014年04月08日
p.format = []byte("2006年01月02日")
return p, nil
case dateDigitChineseYearWs:
p.format = []byte("2006年01月02日 15:04:05")
return p, nil
case dateWeekdayComma:
// Monday, 02 Jan 2006 15:04:05 -0700
// Monday, 02 Jan 2006 15:04:05 +0100
// Monday, 02-Jan-06 15:04:05 MST
return p, nil
case dateWeekdayAbbrevComma:
// Mon, 02-Jan-06 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 MST
return p, nil
}
return nil, fmt.Errorf("Could not find date format for %s", datestr)
}
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