WIP: Watch me WIP, WIP, watch me nay-nay
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# go-goodtimes
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Webhooks, on time.
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Webhooks, on time.
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```
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go generate -mod=vendor ./...
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go build -mod=vendor ./...
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```
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20
rollover.go
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20
rollover.go
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package main
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import (
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"fmt"
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"time"
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)
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func mainx() {
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t1 := time.Date(2019, 06, 16, -1, 31, 0, 0, time.UTC)
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fmt.Println(t1)
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t1 = time.Date(2019, 06, 16, 0, 31, 0, 0, time.UTC)
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fmt.Println(t1)
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t1 = time.Date(2019, 06, 16, 23, 31, 0, 0, time.UTC)
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fmt.Println(t1)
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t1 = time.Date(2019, 06, 16, 24, 31, 0, 0, time.UTC)
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fmt.Println(t1)
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}
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211
time.go
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211
time.go
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package main
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import (
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"fmt"
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"time"
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)
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// https://yourbasic.org/golang/time-change-convert-location-timezone/
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// https://sebest.github.io/post/create-a-small-docker-image-for-a-golang-binary/
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// https://github.com/FKSE/docker-golang-base
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// tar cfz zoneinfo.tar.gz /usr/share/zoneinfo
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// git clone https://github.com/eggert/tz
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// grep '^Rule' -r tz/ | cut -f8-10 | egrep -iv 'Rule|SAVE'
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// egrep '\s0:30' -r tz/
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func main() {
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// blacklist "", "Local"
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// UTC to TZ should always be correct
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// TZ to UTC may not be correct
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now := time.Now()
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fmt.Println("Now", now.Format(time.RFC3339))
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loc, err := time.LoadLocation("America/Phoenix")
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if nil != err {
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panic(err)
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}
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fmt.Println("Loc", now.In(loc))
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/* boundary checks */
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CheckInput([]int{2019, 11, 10,
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01, 02, 56, 0})
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CheckInput([]int{2019, 11, 10,
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01, 02, 60, 0})
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CheckInput([]int{2019, 11, 10,
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01, 60, 59, 0})
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CheckInput([]int{2019, 11, 10,
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24, 59, 59, 0})
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CheckInput([]int{2019, 11, 10,
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25, 59, 59, 0})
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CheckInput([]int{2019, 11, 10,
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23, 59, 59, 0})
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CheckInput([]int{2019, 11, 31,
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23, 0, 0, 0})
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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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}
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func CheckInput2(st []int, tzstr string) {
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m := time.Month(st[1])
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tz, err := time.LoadLocation(tzstr)
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if nil != err {
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fmt.Println("screwed the pooch")
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return
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}
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// Does the time exist
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t1 := time.Date(st[0], m, st[2], st[3], st[4], st[5], st[6], tz)
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if st[5] != t1.Second() {
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fmt.Println("Bad Second", st, t1)
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return
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}
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if st[4] != t1.Minute() {
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fmt.Println("Bad Minute", st, t1.Minute())
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return
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}
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if st[3] != t1.Hour() {
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fmt.Println("Bad Hour", st, t1)
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return
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}
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if st[2] != t1.Day() {
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fmt.Println("Bad Day of Month", st, t1)
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return
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}
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if st[1] != int(t1.Month()) {
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fmt.Println("Bad Month", st, t1)
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return
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}
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if st[0] != t1.Year() {
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fmt.Println("Bad Year", st, t1)
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return
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}
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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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// However, it seems that DST always changes by one or two whole hours
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// Oh, and then there's Luthuania...
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// Rule LH 2008 max - Oct Sun>=1 2:00 0:30 -
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//
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// https://en.wikipedia.org/wiki/Daylight_saving_time_by_country
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// https://en.wikipedia.org/wiki/Winter_time_(clock_lag)
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// https://en.wikipedia.org/wiki/Summer_time_in_Europe
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// https://en.wikipedia.org/wiki/Daylight_saving_time_in_the_Americas
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// If I change the time iadd or subtract time in UTC, do I see the same difference in TZ?
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u1 := t1.UTC()
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// A better way to do this would probably be to parse the timezone database, but... yeah...
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for _, n := range []int{ /*-120, -60,*/ 30, 60, 120} {
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t2 := time.Date(st[0], m, st[2], st[3], st[4]+n, st[5], st[6], tz)
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u2 := t2.UTC()
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if u1.Equal(u2) {
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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
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}
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}
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//ta :=
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}
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func CheckInput(st []int) {
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m := time.Month(st[1])
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t1 := time.Date(st[0], m, st[2], st[3], st[4], st[5], st[6], time.UTC)
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if st[5] != t1.Second() {
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fmt.Println("Bad Second", st)
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return
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}
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if st[4] != t1.Minute() {
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fmt.Println("Bad Minute", st, t1.Minute())
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return
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}
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if st[3] != t1.Hour() {
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fmt.Println("Bad Hour", st)
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return
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}
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if st[2] != t1.Day() {
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fmt.Println("Bad Day of Month", st)
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return
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}
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if st[1] != int(t1.Month()) {
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fmt.Println("Bad Month", st)
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return
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}
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if st[0] != t1.Year() {
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fmt.Println("Bad Year", st)
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return
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}
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}
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/*
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//////
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////// 9:01 twice
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//////
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var d = new Date("3/10/2019, 01:59:00");
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console.log("tzUTC:" + tzUTC(d, 'America/Denver'));
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// tzUTC:Sun, 10 Mar 2019 08:59:00 GMT
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var d = new Date("3/10/2019, 02:01:00");
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console.log("tzUTC:" + tzUTC(d, 'America/Denver'));
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// tzUTC:Sun, 10 Mar 2019 09:01:00 GMT
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var d = new Date("3/10/2019, 02:59:00");
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console.log("tzUTC:" + tzUTC(d, 'America/Denver'));
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// tzUTC:Sun, 10 Mar 2019 09:59:00 GMT
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var d = new Date("3/10/2019, 03:01:00");
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console.log("tzUTC:" + tzUTC(d, 'America/Denver'));
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// tzUTC:Sun, 10 Mar 2019 09:01:00 GMT
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//////
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////// 8:01 never
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//////
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var d = new Date("11/03/2019, 01:59:00");
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console.log("tzUTC:" + tzUTC(d, 'America/Denver'));
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// tzUTC:Sun, 03 Nov 2019 07:59:00 GMT
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var d = new Date("11/03/2019, 02:01:00");
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console.log("tzUTC:" + tzUTC(d, 'America/Denver'));
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// tzUTC:Sun, 03 Nov 2019 09:01:00 GMT
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var d = new Date("11/03/2019, 02:59:00");
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console.log("tzUTC:" + tzUTC(d, 'America/Denver'));
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// tzUTC:Sun, 03 Nov 2019 09:59:00 GMT
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var d = new Date("11/03/2019, 03:01:00");
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console.log("tzUTC:" + tzUTC(d, 'America/Denver'));
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tzUTC:Sun, 03 Nov 2019 10:01:00 GMT
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*/
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