go-pkg/dateparse
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Create Option type, and system for loading options

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Created PreferMonthFirst option, which exposes preferMonthFirst in a backwards compatible manner with optional spread functions that operate on the parser when it's being constructed
This commit is contained in:
troyspencer 2019-08-07 22:12:45 -05:00
parent d530bcec9b
commit e151913243
1 changed files with 28 additions and 13 deletions
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37
parseany.go
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@ -209,9 +209,9 @@ func ParseStrict(datestr string) (time.Time, error) {
return p.parse()
}
func parseTime(datestr string, loc *time.Location) (*parser, error) {
func parseTime(datestr string, loc *time.Location, opts ...Option) (*parser, error) {
p := newParser(datestr, loc)
p := newParser(datestr, loc, opts...)
i := 0
// General strategy is to read rune by rune through the date looking for
@ -630,7 +630,7 @@ iterRunes:
} else if i == 4 {
// gross
datestr = datestr[0:i-1] + datestr[i:]
return parseTime(datestr, loc)
return parseTime(datestr, loc, opts...)
} else {
return nil, unknownErr(datestr)
}
@ -795,25 +795,25 @@ iterRunes:
case 't', 'T':
if p.nextIs(i, 'h') || p.nextIs(i, 'H') {
if len(datestr) > i+2 {
return parseTime(fmt.Sprintf("%s%s", p.datestr[0:i], p.datestr[i+2:]), loc)
return parseTime(fmt.Sprintf("%s%s", p.datestr[0:i], p.datestr[i+2:]), loc, opts...)
}
}
case 'n', 'N':
if p.nextIs(i, 'd') || p.nextIs(i, 'D') {
if len(datestr) > i+2 {
return parseTime(fmt.Sprintf("%s%s", p.datestr[0:i], p.datestr[i+2:]), loc)
return parseTime(fmt.Sprintf("%s%s", p.datestr[0:i], p.datestr[i+2:]), loc, opts...)
}
}
case 's', 'S':
if p.nextIs(i, 't') || p.nextIs(i, 'T') {
if len(datestr) > i+2 {
return parseTime(fmt.Sprintf("%s%s", p.datestr[0:i], p.datestr[i+2:]), loc)
return parseTime(fmt.Sprintf("%s%s", p.datestr[0:i], p.datestr[i+2:]), loc, opts...)
}
}
case 'r', 'R':
if p.nextIs(i, 'd') || p.nextIs(i, 'D') {
if len(datestr) > i+2 {
return parseTime(fmt.Sprintf("%s%s", p.datestr[0:i], p.datestr[i+2:]), loc)
return parseTime(fmt.Sprintf("%s%s", p.datestr[0:i], p.datestr[i+2:]), loc, opts...)
}
}
}
@ -987,7 +987,7 @@ iterRunes:
// 2014-05-11 08:20:13,787
ds := []byte(p.datestr)
ds[i] = '.'
return parseTime(string(ds), loc)
return parseTime(string(ds), loc, opts...)
case '-', '+':
// 03:21:51+00:00
p.stateTime = timeOffset
@ -1711,8 +1711,18 @@ type parser struct {
t *time.Time
}
func newParser(dateStr string, loc *time.Location) *parser {
p := parser{
type Option func(*parser) error
// PreferMonthFirst is an option that allows preferMonthFirst to be changed from its default
func PreferMonthFirst(preferMonthFirst bool) Option {
return func(p *parser) error {
p.preferMonthFirst = preferMonthFirst
return nil
}
}
func newParser(dateStr string, loc *time.Location, opts ...Option) *parser {
p := &parser{
stateDate: dateStart,
stateTime: timeIgnore,
datestr: dateStr,
@ -1720,7 +1730,12 @@ func newParser(dateStr string, loc *time.Location) *parser {
preferMonthFirst: true,
}
p.format = []byte(dateStr)
return &p
// allow the options to mutate the parser fields from their defaults
for _, option := range opts {
option(p)
}
return p
}
func (p *parser) nextIs(i int, b byte) bool {