69 lines
3.7 KiB
Swift
69 lines
3.7 KiB
Swift
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import ActivityKit
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import Foundation
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@MainActor
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enum LiveActivityCommands {
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private static var busy = false
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static let bindingKey = "MusicBridge.liveActivityPC"
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static func perform(_ action: MusicRemoteAction, activityID: String) async {
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guard !busy, let activity = Activity<MusicActivityAttributes>.activities.first(where: { $0.id == activityID }),
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activity.activityState == .active || activity.activityState == .stale else { return }
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busy = true
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defer { busy = false }
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do {
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guard let saved = try KeychainStore.load(),
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UserDefaults.standard.string(forKey: bindingKey + activityID) == saved.fingerprint else {
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throw BridgeError.message("Откройте приложение и включите карточку заново.")
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}
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let client = BridgeClient(saved, timeout: 5)
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defer { client.close() }
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let fresh = try await execute(action, client: client) {
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(activity.activityState == .active || activity.activityState == .stale) &&
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UserDefaults.standard.string(forKey: bindingKey + activityID) == saved.fingerprint
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}
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guard fresh.hasSession else { await activity.end(nil, dismissalPolicy: .immediate); return }
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await activity.update(ActivityContent(state: LiveActivityManager.content(fresh), staleDate: Date().addingTimeInterval(15)))
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} catch {
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if case BridgeError.unauthorized = error {
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await activity.end(nil, dismissalPolicy: .immediate)
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return
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}
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var value = activity.content.state
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value.message = MusicActivityAttributes.ContentState.bounded(BridgeError.describe(error))
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await activity.update(ActivityContent(state: value, staleDate: Date()))
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}
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}
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// A fresh capability check, one command at most, then a fresh snapshot. No command retries.
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static func execute(_ action: MusicRemoteAction, client: BridgeClient,
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stillValid: () -> Bool = { true }) async throws -> MediaState {
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let before = try await client.state()
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guard stillValid() else { throw BridgeError.message("Карточка закрыта. Откройте MusicBridge.") }
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if action == .refresh { return before }
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guard before.hasSession else { return before }
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let command = try command(action, state: before)
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do { try await client.command(Command(type: command, value: nil)) }
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catch {
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if error is URLError { throw BridgeError.message("Результат команды неизвестен. Нажмите обновление перед повтором.") }
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throw error
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}
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do { return try await client.state() }
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catch {
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if case BridgeError.unauthorized = error { throw error }
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throw BridgeError.message("Команда выполнена. Нажмите обновление, чтобы получить новый трек.")
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}
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}
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static func command(_ action: MusicRemoteAction, state: MediaState) throws -> String {
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switch action {
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case .previous where state.capabilities.previous: return "previous"
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case .next where state.capabilities.next: return "next"
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case .toggle where state.capabilities.toggle: return "toggle"
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case .toggle where state.playbackStatus == "Playing" && state.capabilities.pause: return "pause"
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case .toggle where state.playbackStatus != "Playing" && state.capabilities.play: return "play"
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default: throw BridgeError.message("Плеер на ПК не поддерживает эту команду.")
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}
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}
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}
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