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import SwiftUI
import SafariServices
import PlaygroundSupport
// lil news api
let apiURL = "https://api.lil.software/news"
struct News: Codable {
var articles: [Article]
}
struct Article: Codable, Hashable {
var title: String
var url: String
var image: String?
var source: String
}
struct NewsView: View {
@State var articles: [Article] = []
@State var loading = true
var body: some View {
NavigationView {
VStack {
if self.loading {
Text("Loading...")
} else {
List {
ForEach(articles, id: \.self) { article in
ArticleView(article: article)
}
}
.navigationBarTitle("News", displayMode: .inline)
}
}
}
.navigationViewStyle(StackNavigationViewStyle())
.onAppear(perform: {
self.loadNews()
})
}
func loadNews() {
// create the API url (ex: https://api.lil.software/news)
let request = URLRequest(url: URL(string: apiURL)!)
// initiate the API request
URLSession.shared.dataTask(with: request) { data, response, error in
if let data = data {
// decode the response into our News struct
if let decodedResponse = try? JSONDecoder().decode(News.self, from: data) {
DispatchQueue.main.async {
// set the articles based on the API response
self.articles = decodedResponse.articles
// we're no longer "loading"
self.loading = false
}
return
}
}
}.resume()
}
}
struct ArticleView: View {
@State var article: Article
@State var showWebView = false
var body: some View {
Button(action: { self.showWebView = true }) {
VStack (alignment: .leading, spacing: 24) {
HStack(alignment: .top, spacing: 16) {
ImageView(imageUrl: article.image ?? "")
.frame(width: 128, height: 96)
.background(Color(UIColor.systemFill))
.cornerRadius(4)
.clipped()
VStack (alignment: .leading, spacing: 6) {
Text(article.title)
.font(.system(.headline, design: .serif))
Text(article.source)
.font(.callout)
.lineLimit(1)
.foregroundColor(.secondary)
}
}
}
.padding(.vertical, 12)
}
.buttonStyle(PlainButtonStyle())
.sheet(isPresented: $showWebView) {
WebView(url: URL(string: self.article.url)!)
}
}
}
struct WebView: UIViewControllerRepresentable {
// to display an article's website
let url: URL
func makeUIViewController(context: UIViewControllerRepresentableContext<WebView>) -> SFSafariViewController {
let webview = SFSafariViewController(url: url)
return webview
}
func updateUIViewController(_ uiViewController: SFSafariViewController, context: UIViewControllerRepresentableContext<WebView>) {
// nothing to do
}
}
struct ImageView: View {
@ObservedObject var remoteImageURL: RemoteImageURL
init(imageUrl: String) {
remoteImageURL = RemoteImageURL(imageURL: imageUrl)
}
var body: some View {
Image(uiImage: UIImage(data: self.remoteImageURL.data) ?? UIImage())
.resizable()
.scaledToFit()
.aspectRatio(contentMode: .fill)
}
}
class RemoteImageURL: ObservableObject {
@Published var data = Data()
// load our image URL
init(imageURL: String) {
guard let url = URL(string: imageURL.replacingOccurrences(of: "http://", with: "https://")) else {
print("Invalid URL")
return
}
let request = URLRequest(url: url)
URLSession.shared.dataTask(with: request) { data, response, error in
if let data = data, let response = response {
DispatchQueue.main.async {
self.data = data
}
}
}.resume()
}
}
PlaygroundPage.current.setLiveView(NewsView())
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