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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package util
import (
"sync"
"time"
)
// StopTimer is a utility function to safely stop a time.Timer and clean its channel
func StopTimer(t *time.Timer) bool {
stopped := t.Stop()
if !stopped {
select {
case <-t.C:
default:
}
}
return stopped
}
func Debounce(d time.Duration) func(f func()) {
type debouncer struct {
mu sync.Mutex
t *time.Timer
}
db := &debouncer{}
return func(f func()) {
db.mu.Lock()
defer db.mu.Unlock()
if db.t != nil {
db.t.Stop()
}
var trigger *time.Timer
trigger = time.AfterFunc(d, func() {
db.mu.Lock()
defer db.mu.Unlock()
if trigger == db.t {
f()
db.t = nil
}
})
db.t = trigger
}
}
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