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Merge pull request #676 from cj123/schedule-event-fix
Schedule event fix
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -33,4 +33,8 @@ | |
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| .pl-4-5 { | ||
| padding-left: 2rem!important; | ||
| } | ||
| } | ||
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| .fc-today { | ||
| background: #9ec6f5; | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| package when | ||
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| import ( | ||
| "errors" | ||
| "sync" | ||
| "time" | ||
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| "github.com/sirupsen/logrus" | ||
| ) | ||
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| var ( | ||
| // Resolution is how often each When is checked. | ||
| Resolution = time.Second | ||
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| timers = make(map[*Timer]bool) | ||
| mutex = sync.Mutex{} | ||
| once = sync.Once{} | ||
| ) | ||
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| type Timer struct { | ||
| fn func() | ||
| t time.Time | ||
| } | ||
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| func newTimer(t time.Time, fn func()) *Timer { | ||
| r := &Timer{ | ||
| t: t, | ||
| fn: fn, | ||
| } | ||
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| return r | ||
| } | ||
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| func (t *Timer) Stop() { | ||
| mutex.Lock() | ||
| delete(timers, t) | ||
| mutex.Unlock() | ||
| } | ||
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| var ErrTimeInPast = errors.New("when: time specified is in the past") | ||
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| func When(t time.Time, fn func()) (*Timer, error) { | ||
| if t.Before(time.Now()) { | ||
| return nil, ErrTimeInPast | ||
| } | ||
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| once.Do(func() { | ||
| go func() { | ||
| ticker := time.NewTicker(Resolution) | ||
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| for tick := range ticker.C { | ||
| var toStop []*Timer | ||
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| mutex.Lock() | ||
| for timer := range timers { | ||
| if tick.Round(Resolution).Equal(timer.t.Round(Resolution)) || tick.Round(Resolution).After(timer.t.Round(Resolution)) { | ||
| logrus.Debugf("Starting scheduled event (is now %s)", timer.t) | ||
| go timer.fn() | ||
| toStop = append(toStop, timer) | ||
| } | ||
| } | ||
| mutex.Unlock() | ||
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| for _, timer := range toStop { | ||
| timer.Stop() | ||
| } | ||
| } | ||
| }() | ||
| }) | ||
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| x := newTimer(t, fn) | ||
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| mutex.Lock() | ||
| timers[x] = true | ||
| mutex.Unlock() | ||
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| return x, nil | ||
| } |
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