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// Copyright (C) 2021-2023 Apple Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
// BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
#if canImport(GroupActivities_Private)
import AVFoundation
import Combine
@_spi(Safari) import GroupActivities
import Foundation
@available(macOS 15.0, iOS 18.0, tvOS 18.0, *)
@objc(WKGroupSessionState)
public enum GroupSessionState : Int {
case waiting = 0
case joined = 1
case invalidated = 2
}
@available(macOS 15.0, iOS 18.0, tvOS 18.0, *)
@objc(WKURLActivity)
public final class URLActivityWrapper : NSObject {
private var urlActivity: URLActivity
init(activity: URLActivity) {
self.urlActivity = activity
super.init()
}
@objc public var fallbackURL: URL? {
return self.urlActivity.webpageURL
}
}
@available(macOS 15.0, iOS 18.0, tvOS 18.0, *)
@objc(WKGroupSession)
public final class GroupSessionWrapper : NSObject {
private var groupSession: GroupSession<URLActivity>
private var activityWrapper: URLActivityWrapper
private var cancellables: Set<AnyCancellable> = []
init(groupSession: GroupSession<URLActivity>) {
self.groupSession = groupSession
self.activityWrapper = .init(activity: groupSession.activity)
super.init()
self.groupSession.$activity
.sink { [unowned self] in self.activityChanged(activity: $0) }
.store(in: &cancellables)
self.groupSession.$state
.sink { [unowned self] in self.stateChanged(state: $0) }
.store(in: &cancellables)
}
@objc public var activity: URLActivityWrapper { self.activityWrapper }
@objc public var uuid: UUID { groupSession.id }
private static func wrapperSessionState(state: GroupSession<URLActivity>.State) -> GroupSessionState {
switch state {
case .waiting:
return GroupSessionState.waiting
case .joined:
return GroupSessionState.joined
case .invalidated:
return GroupSessionState.invalidated
@unknown default:
// Unanticipated state value.
assertionFailure()
return GroupSessionState.invalidated
}
}
@objc public var state: GroupSessionState {
return Self.wrapperSessionState(state: groupSession.state)
}
@objc public var newActivityCallback: ((URLActivityWrapper) -> Void)?
@objc public var stateChangedCallback: ((GroupSessionState) -> Void)?
@objc public func join() {
groupSession.join()
}
@objc public func leave() {
groupSession.leave()
}
@objc(coordinateWithCoordinator:)
public func coordinate(coordinator: AVPlaybackCoordinator) {
coordinator.coordinateWithSession(self.groupSession)
}
private func activityChanged(activity: URLActivity) {
self.activityWrapper = .init(activity: groupSession.activity)
guard let callback = newActivityCallback else {
return
}
callback(activityWrapper)
}
private func stateChanged(state: GroupSession<URLActivity>.State) {
guard let callback = stateChangedCallback else {
return
}
callback(Self.wrapperSessionState(state: state))
}
}
@available(macOS 15.0, iOS 18.0, tvOS 18.0, *)
@objc(WKGroupSessionObserver)
public class GroupSessionObserver : NSObject {
@objc public var newSessionCallback: ((GroupSessionWrapper) -> Void)?
private var incomingSessionsTask: Task<Void, Never>?
@objc public override init() {
super.init()
incomingSessionsTask = Task.detached { [weak self] in
for await newSession in URLActivity.self.sessions() {
DispatchQueue.main.async { [weak self] in
self?.receivedSession(newSession)
}
}
}
}
deinit {
incomingSessionsTask?.cancel()
}
private func receivedSession(_ session: GroupSession<URLActivity>) {
guard let callback = newSessionCallback else {
return
}
callback(.init(groupSession: session))
}
}
#endif // canImport(GroupActivities_Private)
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