18 lines
552 B
Swift
18 lines
552 B
Swift
//
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// Copyright 2024 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import Foundation
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public extension NotificationCenter {
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func observe(once name: Notification.Name, object: Any? = nil) -> Guarantee<Notification> {
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let (guarantee, future) = Guarantee<Notification>.pending()
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let observer = addObserver(forName: name, object: object, queue: nil) { notification in
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future.resolve(notification)
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}
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guarantee.done { _ in self.removeObserver(observer) }
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return guarantee
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}
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}
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