iOS/Sources/Extensions/NotificationContent/NotificationLoadingViewController.swift

import Foundation
import PromiseKit
import Shared
import UIKit
import UserNotificationsUI

class NotificationLoadingViewController: UIViewController, NotificationCategory {
    required init(api: HomeAssistantAPI, notification: UNNotification, attachmentURL: URL?) throws {
        super.init(nibName: nil, bundle: nil)
    }

    init() {
        super.init(nibName: nil, bundle: nil)
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        let activityIndicator: UIActivityIndicatorView

        activityIndicator = UIActivityIndicatorView(style: .medium)

        view.addSubview(activityIndicator)
        activityIndicator.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            activityIndicator.topAnchor.constraint(equalTo: view.topAnchor),
            activityIndicator.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            activityIndicator.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            activityIndicator.bottomAnchor.constraint(equalTo: view.bottomAnchor),
        ])

        activityIndicator.startAnimating()
    }

    func start() -> Promise<Void> {
        .value(())
    }

    var mediaPlayPauseButtonType: UNNotificationContentExtensionMediaPlayPauseButtonType { .none }
    var mediaPlayPauseButtonFrame: CGRect?
    var mediaPlayPauseButtonTintColor: UIColor?
    func mediaPlay() {}
    func mediaPause() {}
}