//
//  RemoteImageView.swift
//  Multihost
//
//  Created by Uldis Zingis on 25/07/2022.
//

import SwiftUI
import Combine

struct RemoteImageView: View {
    @ObservedObject var imageLoader: ImageLoader
    @State var image: UIImage = UIImage()

    init(imageURL url: String) {
        imageLoader = ImageLoader(urlString: url)
    }

    var body: some View {
        Image(uiImage: image)
            .resizable()
            .aspectRatio(contentMode: .fill)
            .onReceive(imageLoader.didChange) { data in
                self.image = UIImage(data: data) ?? UIImage()
            }
    }
}

class ImageLoader: ObservableObject {
    var didChange = PassthroughSubject<Data, Never>()
    var data = Data() {
        didSet { didChange.send(data) }
    }

    init(urlString: String) {
        guard let url = URL(string: urlString) else { return }
        let task = URLSession.shared.dataTask(with: url) { data, _, _ in
            guard let data = data else { return }
            DispatchQueue.main.async {
                self.data = data
            }
        }
        task.resume()
    }
}