//
//  RSDAudioVisualPermissionManager.swift
//  Research
//
//  Copyright © 2018 Sage Bionetworks. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
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//

import Foundation
import AVFoundation

/// `RSDAudioVisualAuthorization` is a wrapper for the AVFoundation library that allows a general-purpose
/// step or task to query this library for authorization if and only if that library is required by the
/// application.
///
/// - seealso: `RSDPermissionsStepViewController`
public struct RSDAudioVisualAuthorization {
    
    /// Returns authorization status for `.camera` and `.microphone` permissions.
    public static func authorizationStatus(for permission: RSDStandardPermissionType) -> RSDAuthorizationStatus {
        switch permission {
        case .camera:
            return _avAuthorizationStatus(for: .video)
        case .microphone:
            return _avAuthorizationStatus(for: .audio)
        default:
            return .notDetermined
        }
    }
    
    private static func _avAuthorizationStatus(for mediaType: AVMediaType) -> RSDAuthorizationStatus {
        switch AVCaptureDevice.authorizationStatus(for: mediaType) {
        case .authorized:
            return .authorized
        case .notDetermined:
            return .notDetermined
        case .restricted:
            return .restricted
        case .denied:
            return .denied
        }
    }
}
