YrXtals/ios/src/CaptureController.swift

import AVFoundation

/// gates mic capture on AVCaptureDevice audio permission and exposes start/stop to the iced viewport.
class CaptureController {

    private let session = CaptureSession()
    weak var view: IcedViewportView?

    /// true while AVAudioEngine is running through CaptureSession.
    var isCapturing: Bool { session.isCapturing }

    /// requests AVCaptureDevice audio permission if missing; starts the mic session on grant or when already granted.
    func start() {
        switch AVCaptureDevice.authorizationStatus(for: .audio) {
        case .authorized:
            startSession()
        case .notDetermined:
            AVCaptureDevice.requestAccess(for: .audio) { [weak self] granted in
                DispatchQueue.main.async {
                    if granted { self?.startSession() }
                    else { print("[YrXtals] mic permission denied") }
                }
            }
        case .denied, .restricted:
            print("[YrXtals] mic permission previously denied")
        @unknown default:
            print("[YrXtals] mic permission status unknown")
        }
    }

    /// stops the mic session.
    func stop() {
        session.stop()
    }

    private func startSession() {
        session.viewportHandleProvider = { [weak view = self.view] in
            view?.viewportHandle
        }
        do {
            try session.start()
        } catch {
            print("[YrXtals] CaptureSession start failed: \(error)")
        }
    }
}