WIP WIP, nae nae

This commit is contained in:
AJ ONeal 2019-06-18 16:24:58 -06:00
parent d3fbe75661
commit e54a8c6241
1 changed files with 92 additions and 61 deletions

153
time.go
View File

@ -25,20 +25,20 @@ func main() {
fmt.Println("Loc", now.In(loc)) fmt.Println("Loc", now.In(loc))
/* boundary checks */ /* boundary checks */
CheckInput([]int{2019, 11, 10, for _, st := range [][]int{
01, 02, 56, 0}) []int{2019, 11, 10, 01, 02, 56, 0},
CheckInput([]int{2019, 11, 10, []int{2019, 11, 10, 01, 02, 60, 0},
01, 02, 60, 0}) []int{2019, 11, 10, 01, 60, 59, 0},
CheckInput([]int{2019, 11, 10, []int{2019, 11, 10, 24, 59, 59, 0},
01, 60, 59, 0}) []int{2019, 11, 10, 25, 59, 59, 0},
CheckInput([]int{2019, 11, 10, []int{2019, 11, 10, 23, 59, 59, 0},
24, 59, 59, 0}) []int{2019, 11, 31, 23, 0, 0, 0},
CheckInput([]int{2019, 11, 10, } {
25, 59, 59, 0}) err := Exists(st, "America/Denver")
CheckInput([]int{2019, 11, 10, if nil != err {
23, 59, 59, 0}) fmt.Println(err)
CheckInput([]int{2019, 11, 31, }
23, 0, 0, 0}) }
/* funky times */ /* funky times */
tz := "America/Denver" tz := "America/Denver"
@ -75,41 +75,94 @@ func main() {
05, 01, 00, 0}, tz) 05, 01, 00, 0}, tz)
} }
func CheckInput2(st []int, tzstr string) { type ErrNoExist struct {
m := time.Month(st[1]) e string
t []int
z string
}
func (err ErrNoExist) Error() string {
return fmt.Sprintf("E_INVALID_TIME: '%#v' is not a valid timestamp at '%s': %s", err.t, err.z, err.e)
}
// Check if the time is a real time in the given timezone.
//
// For example: 2:30am doesn't happen on 2019 Nov 3rd according
// to America/Denver local time, due to the end of Daylight Savings Time,
// but it did happen in America/Phoenix.
//
// Also rejects times that are parsable and return a valid date object,
// but are not canonical, such as 24:60:75 November 31st, 2020.
// (which would be represented as `2020-12-02 02:01:15 +0000 UTC`)
//
// Example of parsable, but non-canonical time:
//
// fmt.Println(time.Date(2020, time.November, 31, 25, 60, 0, 0, time.UTC))
// "2020-12-02 02:01:15 +0000 UTC"
//
// Example of a canonical, but non-parsable time (the 2016 leap second):
//
// fmt.Println(time.Date(2016, time.December, 31, 23, 59, 60, 0, time.UTC))
// "2020-12-02 02:00:00 +0000 UTC" // should be "2016-12-31 23:59:60 +0000 UTC"
func Exists(st []int, tzstr string) error {
tz, err := time.LoadLocation(tzstr) tz, err := time.LoadLocation(tzstr)
if nil != err { if nil != err {
fmt.Println("screwed the pooch") return err
return
} }
// Does the time exist m := time.Month(st[1])
t1 := time.Date(st[0], m, st[2], st[3], st[4], st[5], st[6], tz) t1 := time.Date(st[0], m, st[2], st[3], st[4], st[5], st[6], tz)
if st[5] != t1.Second() { if st[5] != t1.Second() {
fmt.Println("Bad Second", st, t1) return ErrNoExist{
return t: st,
z: tzstr,
e: "invalid second, probably just bad math on your part",
}
} }
if st[4] != t1.Minute() { if st[4] != t1.Minute() {
fmt.Println("Bad Minute", st, t1.Minute()) return ErrNoExist{
return t: st,
z: tzstr,
e: "invalid minute, probably just bad math on your part, but perhaps a half-hour daylight savings or summer time",
}
} }
if st[3] != t1.Hour() { if st[3] != t1.Hour() {
fmt.Println("Bad Hour", st, t1) return ErrNoExist{
return t: st,
z: tzstr,
e: "invalid hour, possibly a Daylight Savings or Summer Time error, or perhaps bad math on your part",
}
} }
if st[2] != t1.Day() { if st[2] != t1.Day() {
fmt.Println("Bad Day of Month", st, t1) return ErrNoExist{
return t: st,
z: tzstr,
e: "invalid day of month, most likely bad math on your part. Remember: 31 28¼ 31 30 31 30 31 31 30 31 30 31",
}
} }
if st[1] != int(t1.Month()) { if st[1] != int(t1.Month()) {
fmt.Println("Bad Month", st, t1) return ErrNoExist{
return t: st,
z: tzstr,
e: "invalid month, most likely bad math on your part. Remember: Decemberween isn't until next year",
}
} }
if st[0] != t1.Year() { if st[0] != t1.Year() {
fmt.Println("Bad Year", st, t1) return ErrNoExist{
return t: st,
z: tzstr,
e: "invalid year, must have reached the end of time...",
}
} }
return nil
}
func IsAmbigious(st []int, tzstr string) error {
return fmt.Errorf("Not Implemented")
}
func CheckInput2(st []int, tzstr string) error {
// Does the time exist twice? // Does the time exist twice?
// (if I change the time in UTC, do I still get the same time) // (if I change the time in UTC, do I still get the same time)
// Note: Some timezones change by half or quarter hour // Note: Some timezones change by half or quarter hour
@ -122,6 +175,12 @@ func CheckInput2(st []int, tzstr string) {
// https://en.wikipedia.org/wiki/Summer_time_in_Europe // https://en.wikipedia.org/wiki/Summer_time_in_Europe
// https://en.wikipedia.org/wiki/Daylight_saving_time_in_the_Americas // https://en.wikipedia.org/wiki/Daylight_saving_time_in_the_Americas
// If I change the time iadd or subtract time in UTC, do I see the same difference in TZ? // If I change the time iadd or subtract time in UTC, do I see the same difference in TZ?
tz, err := time.LoadLocation(tzstr)
if nil != err {
return err
}
m := time.Month(st[1])
t1 := time.Date(st[0], m, st[2], st[3], st[4], st[5], st[6], tz)
u1 := t1.UTC() u1 := t1.UTC()
// A better way to do this would probably be to parse the timezone database, but... yeah... // A better way to do this would probably be to parse the timezone database, but... yeah...
for _, n := range []int{ /*-120, -60,*/ 30, 60, 120} { for _, n := range []int{ /*-120, -60,*/ 30, 60, 120} {
@ -131,39 +190,11 @@ func CheckInput2(st []int, tzstr string) {
fmt.Println("Ambiguous Time") fmt.Println("Ambiguous Time")
fmt.Printf("%s, %s, %+d\n", t1, u1, n) fmt.Printf("%s, %s, %+d\n", t1, u1, n)
fmt.Printf("%s, %s, %+d\n", t2, u2, n) fmt.Printf("%s, %s, %+d\n", t2, u2, n)
return return nil
} }
} }
//ta := //ta :=
} return nil
func CheckInput(st []int) {
m := time.Month(st[1])
t1 := time.Date(st[0], m, st[2], st[3], st[4], st[5], st[6], time.UTC)
if st[5] != t1.Second() {
fmt.Println("Bad Second", st)
return
}
if st[4] != t1.Minute() {
fmt.Println("Bad Minute", st, t1.Minute())
return
}
if st[3] != t1.Hour() {
fmt.Println("Bad Hour", st)
return
}
if st[2] != t1.Day() {
fmt.Println("Bad Day of Month", st)
return
}
if st[1] != int(t1.Month()) {
fmt.Println("Bad Month", st)
return
}
if st[0] != t1.Year() {
fmt.Println("Bad Year", st)
return
}
} }
/* /*