KeyboardShortcutsEnvironment.swift

import Combine
import ComposableArchitecture
import KeyboardShortcuts

public struct KeyboardShortcutManager {

    public enum Action: Equatable {
        case onKeyDown(UUID)
        case onKeyUp(UUID)
    }

    var bind: ([UUID]) -> Effect<Action, Never> = { _ in _unimplemented("bind") }

    public func bind(uuids: [UUID]) -> Effect<Action, Never> {
        self.bind(uuids)
    }
}

extension KeyboardShortcutManager {
    public struct Properties: Equatable {
        var uuid: UUID? = nil
        public init(uuid: UUID? = nil) {
            self.uuid = uuid
        }
    }
}

extension KeyboardShortcutManager {
    private static var subscriber: Effect<KeyboardShortcutManager.Action, Never>.Subscriber? = nil

    public static let live: () -> KeyboardShortcutManager = {
        var manager = KeyboardShortcutManager()

        manager.bind = { uuids in
            Effect.run { subscriber in
                KeyboardShortcutManager.subscriber = subscriber
                uuids.forEach{ uuid in
                    KeyboardShortcuts.onKeyDown(for: KeyboardShortcuts.Name(uuid.uuidString)) {
                        subscriber.send(.onKeyDown(uuid))
                    }
                    KeyboardShortcuts.onKeyUp(for: KeyboardShortcuts.Name(uuid.uuidString)) {
                        subscriber.send(.onKeyUp(uuid))
                    }
                }
                return AnyCancellable {
                    KeyboardShortcutManager.subscriber = nil
                }
            }
        }
        return manager
    }
}

public func _unimplemented(
  _ function: StaticString, file: StaticString = #file, line: UInt = #line
) -> Never {
  fatalError(
    """
    `\(function)` was called but is not implemented. Be sure to provide an implementation for
    this endpoint when creating the mock.
    """,
    file: file,
    line: line
  )
}