67 lines
2.2 KiB
Swift
67 lines
2.2 KiB
Swift
//
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// Copyright 2025 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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import SignalServiceKit
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/// This entity is responsible for keeping the screen on if certain
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/// behaviors (e.g., recording or playing voice messages) are in progress.
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///
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/// Sleep blocking is achieved by using "block objects". For example, the
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/// audio player will add/remove a "block object" when it starts/stops. If
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/// there are any active "block objects", the device won't sleep. After they
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/// are all removed, the device will be able to sleep.
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class DeviceSleepManagerImpl: DeviceSleepManager {
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@MainActor
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private var blockObjects = [Weak<DeviceSleepBlockObject>]()
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init() {
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SwiftSingletons.register(self)
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}
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@MainActor
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public func addBlock(blockObject: DeviceSleepBlockObject) {
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blockObjects.append(Weak(value: blockObject))
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ensureSleepBlocking()
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}
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@MainActor
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public func removeBlock(blockObject: DeviceSleepBlockObject) {
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blockObjects.removeAll(where: { $0.value === blockObject })
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ensureSleepBlocking()
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}
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@MainActor
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private func ensureSleepBlocking() {
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// Cull expired blocks.
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if blockObjects.contains(where: { $0.value == nil }) {
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owsFailDebug("Callers must remove BlockObjects explicitly.")
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blockObjects.removeAll(where: { $0.value == nil })
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}
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let blockObjects = self.blockObjects.compactMap(\.value)
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let description: String
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switch blockObjects.count {
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case 0:
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description = "no blocking objects"
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case 1:
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description = "\(blockObjects[0].blockReason)"
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default:
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description = "\(blockObjects[0].blockReason) and \(blockObjects.count - 1) other(s)"
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}
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let shouldBeBlocking = !blockObjects.isEmpty
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if UIApplication.shared.isIdleTimerDisabled != shouldBeBlocking {
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if shouldBeBlocking {
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Logger.info("Blocking sleep because of: \(description)")
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} else {
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Logger.info("Unblocking sleep.")
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}
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}
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UIApplication.shared.isIdleTimerDisabled = shouldBeBlocking
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}
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}
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