You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
1.7 KiB
70 lines
1.7 KiB
// Copyright (c) 2021 Proton Technologies AG |
|
// |
|
// This file is part of ProtonMail Bridge. |
|
// |
|
// ProtonMail 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. |
|
// |
|
// ProtonMail 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 ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>. |
|
|
|
package confirmer |
|
|
|
import ( |
|
"errors" |
|
"sync" |
|
"time" |
|
|
|
"github.com/google/uuid" |
|
) |
|
|
|
// Request provides a result when it becomes available. |
|
type Request struct { |
|
uuid string |
|
ch chan bool |
|
timeout time.Duration |
|
|
|
expired bool |
|
locker sync.Locker |
|
} |
|
|
|
func newRequest(timeout time.Duration) *Request { |
|
return &Request{ |
|
uuid: uuid.New().String(), |
|
ch: make(chan bool), |
|
timeout: timeout, |
|
locker: &sync.Mutex{}, |
|
} |
|
} |
|
|
|
// ID returns the request's ID, used to set the request's value. |
|
func (r *Request) ID() string { |
|
return r.uuid |
|
} |
|
|
|
// Result returns the result or an error if it is not available within the request timeout. |
|
func (r *Request) Result() (bool, error) { |
|
r.locker.Lock() |
|
defer r.locker.Unlock() |
|
|
|
if r.expired { |
|
return false, errors.New("this result has expired") |
|
} |
|
|
|
defer func() { r.expired = true }() |
|
|
|
select { |
|
case res := <-r.ch: |
|
return res, nil |
|
|
|
case <-time.After(r.timeout): |
|
return false, errors.New("timed out waiting for result") |
|
} |
|
}
|
|
|