bitchat/bitchat/Views/ImagePickerView.swift

// ImagePickerView.swift
// Simple UIKit-based image picker bridge

import SwiftUI
#if os(iOS)
import UIKit
import PhotosUI

struct ImagePickerView: UIViewControllerRepresentable {
    typealias UIViewControllerType = UIViewController
    var onPicked: (UIImage?) -> Void

    func makeUIViewController(context: Context) -> UIViewController {
        if #available(iOS 14.0, *) {
            var config = PHPickerConfiguration(photoLibrary: .shared())
            config.filter = .images
            config.selectionLimit = 1
            let picker = PHPickerViewController(configuration: config)
            picker.delegate = context.coordinator
            return picker
        } else {
            let picker = UIImagePickerController()
            picker.delegate = context.coordinator
            picker.sourceType = .photoLibrary
            picker.allowsEditing = false
            return picker
        }
    }

    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {}

    func makeCoordinator() -> Coordinator {
        Coordinator(onPicked: onPicked)
    }

    final class Coordinator: NSObject, PHPickerViewControllerDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
        let onPicked: (UIImage?) -> Void
        init(onPicked: @escaping (UIImage?) -> Void) { self.onPicked = onPicked }

        // PHPicker
        @available(iOS 14.0, *)
        func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
            picker.dismiss(animated: true)
            guard let item = results.first else { onPicked(nil); return }
            if item.itemProvider.canLoadObject(ofClass: UIImage.self) {
                item.itemProvider.loadObject(ofClass: UIImage.self) { object, _ in
                    DispatchQueue.main.async {
                        self.onPicked(object as? UIImage)
                    }
                }
            } else {
                onPicked(nil)
            }
        }

        // UIImagePicker
        func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
            picker.dismiss(animated: true)
            onPicked(nil)
        }
        func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
            let image = info[.originalImage] as? UIImage
            picker.dismiss(animated: true)
            onPicked(image)
        }
    }
}
#endif