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times_schedule.go
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times_schedule.go
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/*
Copyright (c) 2022 - Present. Blend Labs, Inc. All rights reserved
Use of this source code is governed by a MIT license that can be found in the LICENSE file.
*/
package cron
import (
"fmt"
"sync"
"time"
)
// Interface assertions.
var (
_ Schedule = (*TimesSchedule)(nil)
_ fmt.Stringer = (*TimesSchedule)(nil)
)
// Times returns a new times schedule that returns a given
// next run time from a schedule only a certain number of times.
func Times(times int, schedule Schedule) *TimesSchedule {
return &TimesSchedule{
times: times,
left: times,
schedule: schedule,
}
}
// TimesSchedule is a schedule that only returns
// a certain number of schedule "Next" results
// after which it returns time.Time{} for the next runtime.
type TimesSchedule struct {
sync.Mutex
times int
left int
schedule Schedule
}
// Next implements cron.Schedule.
func (ts *TimesSchedule) Next(after time.Time) time.Time {
ts.Lock()
defer ts.Unlock()
if ts.left > 0 {
ts.left--
return ts.schedule.Next(after)
}
return Zero
}
// String returns a string representation of the schedul.e
func (ts *TimesSchedule) String() string {
if typed, ok := ts.schedule.(fmt.Stringer); ok {
return fmt.Sprintf("%s %d/%d times", typed.String(), ts.left, ts.times)
}
return fmt.Sprintf("%d/%d times", ts.left, ts.times)
}