42 lines
1.2 KiB
Swift
42 lines
1.2 KiB
Swift
//
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// Copyright 2025 Element Creations Ltd.
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// Copyright 2025 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
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// Please see LICENSE files in the repository root for full details.
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//
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import Combine
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/// A setting that can be instantiated with a default value, remotely overridden and reset back
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/// to the default, automatically publishing the changes for downstream subscribers to react to.
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///
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/// Unlike ``UserPreference``, this type of setting isn't settable by the user, nor is the
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/// remote value persisted between app launches.
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class RemotePreference<T: Equatable> {
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private let defaultValue: T
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private let subject: CurrentValueSubject<T, Never>
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var publisher: CurrentValuePublisher<T, Never> {
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subject.asCurrentValuePublisher()
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}
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var isRemotelyConfigured: Bool {
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subject.value != defaultValue
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}
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init(_ defaultValue: T) {
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self.defaultValue = defaultValue
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subject = .init(defaultValue)
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}
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func applyRemoteValue(_ value: T) {
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subject.send(value)
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}
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func reset() {
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if isRemotelyConfigured {
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subject.send(defaultValue)
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}
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}
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}
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