geolocate OSM

import UIKit
import CoreLocation
import MapKit

class LitterReportViewController: UIViewController {
  // MARK: - Properties
  private let imagePickerController = UIImagePickerController()
  private var selectedImage: UIImage?
  private var locationManager: CLLocationManager?
  private var currentLocation: CLLocation?

  // MARK: - Outlets
  @IBOutlet weak var mapView: MKMapView!
  @IBOutlet weak var takePhotoButton: UIButton!
  @IBOutlet weak var submitButton: UIButton!

  // MARK: - Actions
  @IBAction func takePhotoButtonTapped(_ sender: Any) {
    showImagePicker()
  }

  @IBAction func submitButtonTapped(_ sender: Any) {
    guard let location = currentLocation else {
      showMissingLocationAlert()
      return
    }

    guard let image = selectedImage else {
      showMissingImageAlert()
      return
    }

    submitLitterReport(location: location, image: image)
  }

  // MARK: - Private
  private func showImagePicker() {
    imagePickerController.sourceType = .camera
    imagePickerController.delegate = self
    present(imagePickerController, animated: true)
  }

  private func showMissingLocationAlert() {
    let alertController = UIAlertController(title: "Missing Location",
                                            message: "Unable to determine current location. Please try again.",
                                            preferredStyle: .alert)
    let okAction = UIAlertAction(title: "OK", style: .default)
    alertController.addAction(okAction)
    present(alertController, animated: true)
  }

  private func showMissingImageAlert() {
    let alertController = UIAlertController(title: "Missing Image",
                                            message: "Please take a photo of the litter.",
                                            preferredStyle: .alert)
    let okAction = UIAlertAction(title: "OK", style: .default)
    alertController.addAction(okAction)
    present(alertController, animated: true)
  }

  private func submitLitterReport(location: CLLocation, image: UIImage) {
    // TODO: Implement code to submit litter report
    // 1. Upload the image and location data to a server
    // 2. Add a pin to the map at the specified location
  }

  private func setupLocationManager() {
    locationManager = CLLocationManager()
    locationManager?.desiredAccuracy = kCLLocationAccuracyBest
    locationManager?.distanceFilter = kCLDistanceFilterNone
    locationManager?.delegate = self
  }

  private func requestLocationPermission() {
    let status = CLLocationManager.authorizationStatus()

    switch status {
    case .authorizedWhenInUse, .authorizedAlways:
      // TODO: Start updating location
      break
    case .notDetermined:
      locationManager?.requestWhenInUseAuthorization()
    case .restricted, .denied