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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
import SwiftUI
import WebKit
enum WebViewState {
case loading
case loaded
case error
}
class WebViewModel: ObservableObject {
@Published var state: WebViewState = .loading
private var webView: WKWebView?
var url: URL?
func setWebView(_ webView: WKWebView, url: URL) {
self.webView = webView
self.url = url
}
func reload() {
DispatchQueue.main.async {
guard let url = self.url else { return }
self.state = .loading
self.webView?.stopLoading()
self.webView?.load(URLRequest(url: url))
}
}
}
// WebView for displaying the URL
struct WebView: UIViewRepresentable {
let url: URL
@ObservedObject var viewModel: WebViewModel
func makeUIView(context: Context) -> WKWebView {
let webView = WKWebView()
webView.navigationDelegate = context.coordinator
webView.load(URLRequest(url: url))
DispatchQueue.main.async {
viewModel.setWebView(webView, url: url)
}
return webView
}
func updateUIView(_ webView: WKWebView, context: Context) {}
func makeCoordinator() -> Coordinator {
return Coordinator(viewModel: viewModel)
}
class Coordinator: NSObject, WKNavigationDelegate {
var viewModel: WebViewModel
init(viewModel: WebViewModel) {
self.viewModel = viewModel
}
func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
DispatchQueue.main.async {
self.viewModel.state = .loading
}
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
DispatchQueue.main.async {
self.viewModel.state = .loaded
}
}
func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
DispatchQueue.main.async {
self.viewModel.state = .error
}
}
func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
DispatchQueue.main.async {
self.viewModel.state = .error
}
}
}
}
// Privacy Policy View
struct PrivacyPolicyView: View {
@Environment(\.presentationMode) var presentationMode
@StateObject private var viewModel = WebViewModel()
private struct Constants {
static let buttonPadding: CGFloat = 26
static let titlePadding: CGFloat = 20
static let subtitlePadding: CGFloat = 10
}
let url: URL
let doneButtonText: String
let errorMessage: String
let retryButtonText: String
init(
doneButtonText: String,
errorMessage: String,
retryButtonText: String,
url: URL
) {
self.doneButtonText = doneButtonText
self.errorMessage = errorMessage
self.retryButtonText = retryButtonText
self.url = url
}
var body: some View {
NavigationView {
ZStack {
WebView(url: url, viewModel: viewModel)
if viewModel.state == .loading {
VStack {
ProgressView()
.progressViewStyle(CircularProgressViewStyle())
.padding()
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(Color.white.opacity(0.8))
}
if viewModel.state == .error {
VStack {
Image(systemName: "wifi.slash")
.resizable()
.frame(width: 50, height: 50)
.foregroundColor(.gray)
.padding()
Text(errorMessage)
.font(.headline)
.multilineTextAlignment(.center)
.padding()
Button(action: {
viewModel.reload()
}) {
Text(retryButtonText)
}
.buttonStyle(PrimaryButtonStyle())
.padding(Constants.buttonPadding)
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(Color.white.opacity(0.8))
}
}
.navigationBarItems(trailing: Button(doneButtonText) {
presentationMode.wrappedValue.dismiss()
})
.ignoresSafeArea(edges: [.bottom])
}
}
}