Tusker/Tusker/Screens/Compose/ComposeAvatarImageView.swift

65 lines
1.7 KiB
Swift

//
// ComposeAvatarImageView.swift
// Tusker
//
// Created by Shadowfacts on 8/18/20.
// Copyright © 2020 Shadowfacts. All rights reserved.
//
import SwiftUI
struct ComposeAvatarImageView: View {
let url: URL?
@State var request: ImageCache.Request? = nil
@State var avatarImage: UIImage? = nil
@ObservedObject var preferences = Preferences.shared
var body: some View {
image
.resizable()
.conditionally(url != nil) {
$0.onAppear(perform: self.loadImage)
}
.onDisappear(perform: self.cancelRequest)
}
private var image: Image {
if let avatarImage = avatarImage {
return Image(uiImage: avatarImage).renderingMode(.original)
} else {
return placeholderImage
}
}
private var placeholderImage: Image {
let imageName: String
switch preferences.avatarStyle {
case .circle:
imageName = "person.crop.circle"
case .roundRect:
imageName = "person.crop.square"
}
return Image(systemName: imageName)
}
private func loadImage() {
guard let url = url else { return }
request = ImageCache.avatars.get(url) { (_, image) in
DispatchQueue.main.async {
self.request = nil
self.avatarImage = image
}
}
}
private func cancelRequest() {
request?.cancel()
}
}
struct ComposeAvatarImageView_Previews: PreviewProvider {
static var previews: some View {
ComposeAvatarImageView(url: URL(string: "https://social.shadowfacts.net/media/4b481afc591a8f3d11d0f5732e5cb320422dec72d7f223ebb5f35d5d0e821a9c.png")!)
}
}