forked from Silverfish/proton-bridge
71 lines
1.7 KiB
Go
71 lines
1.7 KiB
Go
// Copyright (c) 2021 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// ProtonMail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package confirmer
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import (
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"errors"
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"sync"
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"time"
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"github.com/google/uuid"
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)
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// Request provides a result when it becomes available.
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type Request struct {
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uuid string
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ch chan bool
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timeout time.Duration
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expired bool
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locker sync.Locker
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}
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func newRequest(timeout time.Duration) *Request {
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return &Request{
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uuid: uuid.New().String(),
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ch: make(chan bool),
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timeout: timeout,
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locker: &sync.Mutex{},
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}
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}
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// ID returns the request's ID, used to set the request's value.
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func (r *Request) ID() string {
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return r.uuid
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}
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// Result returns the result or an error if it is not available within the request timeout.
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func (r *Request) Result() (bool, error) {
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r.locker.Lock()
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defer r.locker.Unlock()
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if r.expired {
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return false, errors.New("this result has expired")
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}
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defer func() { r.expired = true }()
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select {
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case res := <-r.ch:
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return res, nil
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case <-time.After(r.timeout):
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return false, errors.New("timed out waiting for result")
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}
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}
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