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cooldown.go
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cooldown.go
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// Copyright (c) 2022 Proton AG
//
// This file is part of Proton Mail Bridge.
//
// Proton Mail Bridge is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Proton Mail Bridge is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
package store
import "time"
type cooldown struct {
waitTimes []time.Duration
waitIndex int
lastTry time.Time
}
func (c *cooldown) setExponentialWait(initial time.Duration, base int, maximum time.Duration) {
waitTimes := []time.Duration{}
t := initial
if base > 1 {
for t < maximum {
waitTimes = append(waitTimes, t)
t *= time.Duration(base)
}
}
waitTimes = append(waitTimes, maximum)
c.setWaitTimes(waitTimes...)
}
func (c *cooldown) setWaitTimes(newTimes ...time.Duration) {
c.waitTimes = newTimes
c.reset()
}
// isTooSoon™ returns whether the cooldown period is not yet over.
func (c *cooldown) isTooSoon() bool {
if time.Since(c.lastTry) < c.waitTimes[c.waitIndex] {
return true
}
c.lastTry = time.Now()
return false
}
func (c *cooldown) increaseWaitTime() {
c.lastTry = time.Now()
if c.waitIndex+1 < len(c.waitTimes) {
c.waitIndex++
}
}
func (c *cooldown) reset() {
c.waitIndex = 0
c.lastTry = time.Time{}
}