WIP WIP, nae nae Exists, IsAmbiguous
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parent
e54a8c6241
commit
e09133ae54
95
time.go
95
time.go
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@ -43,36 +43,28 @@ func main() {
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/* funky times */
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tz := "America/Denver"
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fmt.Println("funky")
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CheckInput2([]int{2019, 3, 10,
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01, 59, 00, 0}, tz)
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CheckInput2([]int{2019, 3, 10,
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02, 00, 00, 0}, tz)
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CheckInput2([]int{2019, 3, 10,
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02, 01, 00, 0}, tz)
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CheckInput2([]int{2019, 3, 10,
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02, 59, 00, 0}, tz)
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CheckInput2([]int{2019, 3, 10,
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03, 00, 00, 0}, tz)
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CheckInput2([]int{2019, 3, 10,
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03, 01, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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0, 59, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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01, 59, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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02, 00, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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02, 01, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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02, 59, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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03, 00, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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03, 01, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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04, 01, 00, 0}, tz)
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CheckInput2([]int{2019, 11, 03,
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05, 01, 00, 0}, tz)
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for _, st := range [][]int{
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[]int{2019, 3, 10, 01, 59, 00, 0},
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[]int{2019, 3, 10, 02, 00, 00, 0},
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[]int{2019, 3, 10, 02, 01, 00, 0},
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[]int{2019, 3, 10, 02, 59, 00, 0},
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[]int{2019, 3, 10, 03, 00, 00, 0},
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[]int{2019, 3, 10, 03, 01, 00, 0},
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[]int{2019, 11, 03, 0, 59, 00, 0},
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[]int{2019, 11, 03, 01, 59, 00, 0},
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[]int{2019, 11, 03, 02, 00, 00, 0},
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[]int{2019, 11, 03, 02, 01, 00, 0},
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[]int{2019, 11, 03, 02, 59, 00, 0},
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[]int{2019, 11, 03, 03, 00, 00, 0},
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[]int{2019, 11, 03, 03, 01, 00, 0},
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[]int{2019, 11, 03, 04, 01, 00, 0},
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[]int{2019, 11, 03, 05, 01, 00, 0},
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} {
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err := IsAmbiguous(st, tz)
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if nil != err {
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fmt.Println(err)
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}
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}
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}
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type ErrNoExist struct {
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@ -87,9 +79,9 @@ func (err ErrNoExist) Error() string {
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// Check if the time is a real time in the given timezone.
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//
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// For example: 2:30am doesn't happen on 2019 Nov 3rd according
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// For example: 2:30am doesn't happen on 2019 March 10th according
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// to America/Denver local time, due to the end of Daylight Savings Time,
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// but it did happen in America/Phoenix.
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// but it does happen in America/Phoenix.
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//
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// Also rejects times that are parsable and return a valid date object,
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// but are not canonical, such as 24:60:75 November 31st, 2020.
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@ -97,13 +89,20 @@ func (err ErrNoExist) Error() string {
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//
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// Example of parsable, but non-canonical time:
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//
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// fmt.Println(time.Date(2020, time.November, 31, 25, 60, 0, 0, time.UTC))
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// "2020-12-02 02:01:15 +0000 UTC"
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// var loc *time.Location
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// loc, _ = time.LoadLocation("America/Denver")
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// t := time.Date(2019, time.March, 10, 1, 30, 0, 0, loc)
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// fmt.Println(t, "==", t.UTC())
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// // 2019-03-10 01:30:00 -0700 MST == 2019-03-10 08:30:00 +0000 UTC
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// t = t.Add(time.Duration(1) * time.Hour)
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// fmt.Println(t, "==", t.UTC())
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// // 2019-03-10 03:30:00 -0600 MDT == 2019-03-10 09:30:00 +0000 UTC
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//
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// Example of a canonical, but non-parsable time (the 2016 leap second):
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//
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// fmt.Println(time.Date(2016, time.December, 31, 23, 59, 60, 0, time.UTC))
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// "2020-12-02 02:00:00 +0000 UTC" // should be "2016-12-31 23:59:60 +0000 UTC"
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//
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func Exists(st []int, tzstr string) error {
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tz, err := time.LoadLocation(tzstr)
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if nil != err {
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@ -158,11 +157,27 @@ func Exists(st []int, tzstr string) error {
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return nil
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}
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func IsAmbigious(st []int, tzstr string) error {
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return fmt.Errorf("Not Implemented")
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}
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func CheckInput2(st []int, tzstr string) error {
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// Check if the time happens more than once in a given timezone.
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//
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// For example: 1:30am happens only once on 2019 Nov 3rd according to
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// America/Phoenix time but due to the start of Daylight Savings Time,
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// it happens twice in America/Denver.
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//
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// Example of duplicate, non-canonical time:
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//
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// var loc *time.Location
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// loc, _ = time.LoadLocation("America/Denver")
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// t = time.Date(2019, time.November, 3, 1, 30, 0, 0, loc)
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// fmt.Println(t, "==", t.UTC())
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// // 2019-11-03 01:30:00 -0600 MDT == 2019-11-03 07:30:00 +0000 UTC
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// t = t.Add(time.Duration(1) * time.Hour)
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// fmt.Println(t, "==", t.UTC())
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// // 2019-11-03 01:30:00 -0700 MST == 2019-11-03 08:30:00 +0000 UTC
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// t = t.Add(time.Duration(1) * time.Hour)
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// fmt.Println(t, "==", t.UTC())
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// // 2019-11-03 02:30:00 -0700 MST == 2019-11-03 09:30:00 +0000 UTC
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//
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func IsAmbiguous(st []int, tzstr string) error {
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// Does the time exist twice?
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// (if I change the time in UTC, do I still get the same time)
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// Note: Some timezones change by half or quarter hour
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@ -190,7 +205,7 @@ func CheckInput2(st []int, tzstr string) error {
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fmt.Println("Ambiguous Time")
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fmt.Printf("%s, %s, %+d\n", t1, u1, n)
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fmt.Printf("%s, %s, %+d\n", t2, u2, n)
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return nil
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return fmt.Errorf("Ambiguous")
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}
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}
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//ta :=
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