124 lines
2.3 KiB
Go
124 lines
2.3 KiB
Go
package event
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import (
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"context"
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"reflect"
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"slices"
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"time"
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)
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type IntervalTask struct {
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F func() error
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LastTrigger time.Time
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Interval time.Duration
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}
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type OnceTask struct {
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F func() error
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Trigger time.Time
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}
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type Timer struct {
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Once []OnceTask
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Interval []IntervalTask
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Active bool
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}
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func (t *Timer) Tick() (err error) {
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if !t.Active {
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return
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}
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for i, task := range t.Interval {
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if time.Since(task.LastTrigger) >= task.Interval {
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task.LastTrigger = time.Now()
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err = task.F()
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if err != nil {
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return
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}
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}
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t.Interval[i] = task
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}
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for i, task := range t.Once {
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if task.Trigger.After(time.Now()) {
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err = task.F()
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if err != nil {
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return
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}
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t.Once = slices.Delete(t.Once, i, i)
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}
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}
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return
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}
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func (t *Timer) Trigger(ch chan any) {
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triggerAt := time.Time{}
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found := false
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iOnce, iInterval := -1, -1
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var oTask OnceTask
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for iOnce, oTask = range t.Once {
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if oTask.Trigger.Before(triggerAt) || triggerAt.IsZero() {
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found = true
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triggerAt = oTask.Trigger
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break
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}
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}
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var iTask IntervalTask
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for iInterval, iTask = range t.Interval {
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if iTask.LastTrigger.Add(iTask.Interval).Before(triggerAt) || triggerAt.IsZero() {
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found = true
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triggerAt = iTask.LastTrigger.Add(iTask.Interval)
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break
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}
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}
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if !found {
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return
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}
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now := time.Now()
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time.Sleep(triggerAt.Sub(now))
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if iOnce >= 0 {
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ch <- CallFunc{F: reflect.ValueOf(t.Once[iOnce].F), Args: []reflect.Value{}}
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t.Once = slices.Delete(t.Once, iOnce, iOnce+1)
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return
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}
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if iInterval >= 0 {
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ch <- CallFunc{F: reflect.ValueOf(t.Interval[iInterval].F), Args: []reflect.Value{}}
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t.Interval[iInterval].LastTrigger = now
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return
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}
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panic("unreachable")
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}
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func (t *Timer) Every(interval time.Duration, f func() error) {
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t.Interval = append(t.Interval, IntervalTask{
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F: f,
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Interval: interval,
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})
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}
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func (t *Timer) In(interval time.Duration, f func() error) {
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t.Once = append(t.Once, OnceTask{
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F: f,
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Trigger: time.Now().Add(interval),
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})
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}
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func (t *Timer) MakeEventSource(ctx context.Context) (chSending <-chan any) {
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ch := make(chan any)
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go func() {
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for {
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select {
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case <-ctx.Done():
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return
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default:
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t.Trigger(ch)
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}
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}
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}()
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chSending = ch
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return
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}
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func (t *Timer) Start(c *Loop) {
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c.RegisterEventSource(t.MakeEventSource(c.Ctx))
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}
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