simplex-chat/apps/ios/Shared/Views/Helpers/ImagePicker.swift

//
//  ImagePicker.swift
//  SimpleX
//
//  Created by Evgeny on 23/03/2022.
//  Copyright © 2022 SimpleX Chat. All rights reserved.
//

import SwiftUI
import PhotosUI

struct LibraryImagePicker: UIViewControllerRepresentable {
    typealias UIViewControllerType = PHPickerViewController
    @Binding var image: UIImage?
    var didFinishPicking: (_ didSelectItems: Bool) -> Void

    class Coordinator: PHPickerViewControllerDelegate {
        let parent: LibraryImagePicker

        init(_ parent: LibraryImagePicker) {
            self.parent = parent
        }

        func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
            parent.didFinishPicking(!results.isEmpty)
            guard !results.isEmpty else {
                return
            }

            if let chosenImageProvider = results.first?.itemProvider {
                if chosenImageProvider.canLoadObject(ofClass: UIImage.self) {
                    chosenImageProvider.loadObject(ofClass: UIImage.self)  { [weak self] image, error in
                        DispatchQueue.main.async {
                            self?.loadImage(object: image, error: error)
                        }
                    }
                }
            }
        }

        func loadImage(object: Any?, error: Error? = nil) {
            if let error = error {
                logger.error("Couldn't load image with error: \(error.localizedDescription)")
            }
            parent.image = object as? UIImage
        }
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }

    func makeUIViewController(context: Context) -> PHPickerViewController {
        var config = PHPickerConfiguration()
        config.filter = .images
        config.selectionLimit = 1
        let controller = PHPickerViewController(configuration: config)
        controller.delegate = context.coordinator
        return controller
    }

    func updateUIViewController(_ uiViewController: PHPickerViewController, context: Context) {

    }
}


struct CameraImagePicker: UIViewControllerRepresentable {
    @Environment(\.presentationMode) var presentationMode
    @Binding var image: UIImage?

    class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
        let parent: CameraImagePicker

        init(_ parent: CameraImagePicker) {
            self.parent = parent
        }

        func imagePickerController(_ picker: UIImagePickerController,
                                   didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
            if let uiImage = info[.originalImage] as? UIImage {
                parent.image = uiImage
            }
            parent.presentationMode.wrappedValue.dismiss()
        }
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }

    func makeUIViewController(context: UIViewControllerRepresentableContext<CameraImagePicker>) -> UIImagePickerController {
        let picker = UIImagePickerController()
        picker.sourceType = .camera
        picker.allowsEditing = false
        picker.delegate = context.coordinator
        return picker
    }

    func updateUIViewController(_ uiViewController: UIImagePickerController, context: UIViewControllerRepresentableContext<CameraImagePicker>) {

    }
}