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import UIKit
import WebKit
import StoreKit
class ViewController: UIViewController, WKScriptMessageHandler, WKNavigationDelegate {
let defaults = UserDefaults(suiteName: "group.app.bsky")
var window: UIWindow
var webView: WKWebView?
var prevUrl: URL?
var starterPackUrl: URL?
init(window: UIWindow) {
self.window = window
super.init(nibName: nil, bundle: nil)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidLoad() {
super.viewDidLoad()
let contentController = WKUserContentController()
contentController.add(self, name: "onMessage")
let configuration = WKWebViewConfiguration()
configuration.userContentController = contentController
let webView = WKWebView(frame: self.view.bounds, configuration: configuration)
webView.translatesAutoresizingMaskIntoConstraints = false
webView.contentMode = .scaleToFill
webView.navigationDelegate = self
self.view.addSubview(webView)
self.webView = webView
self.webView?.load(URLRequest(url: URL(string: "https://bsky.app/?splash=true&clip=true")!))
}
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
guard let response = message.body as? String,
let data = response.data(using: .utf8),
let payload = try? JSONDecoder().decode(WebViewActionPayload.self, from: data) else {
return
}
switch payload.action {
case .present:
self.presentAppStoreOverlay()
if let url = self.starterPackUrl {
defaults?.setValue(url.absoluteString, forKey: "starterPackUri")
}
case .store:
guard let keyToStoreAs = payload.keyToStoreAs, let jsonToStore = payload.jsonToStore else {
return
}
self.defaults?.setValue(jsonToStore, forKey: keyToStoreAs)
}
}
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction) async -> WKNavigationActionPolicy {
// Detect when we land on the right URL. This is incase of a short link opening the app clip
guard let url = navigationAction.request.url else {
return .allow
}
// Store the previous one to compare later, but only set starterPackUrl when we find the right one
prevUrl = url
// pathComponents starts with "/" as the first component, then each path name. so...
// ["/", "start", "name", "rkey"]
if isStarterPackUrl(url) {
self.starterPackUrl = url
}
return .allow
}
func isStarterPackUrl(_ url: URL) -> Bool {
var host: String?
if #available(iOS 16.0, *) {
host = url.host()
} else {
host = url.host
}
switch host {
case "bsky.app":
if url.pathComponents.count == 4,
url.pathComponents[1] == "start" || url.pathComponents[1] == "starter-pack" {
return true
}
return false
case "go.bsky.app":
if url.pathComponents.count == 2 {
return true
}
return false
default:
return false
}
}
func handleURL(url: URL) {
if isStarterPackUrl(url) {
let urlString = "\(url.absoluteString)?clip=true"
if let url = URL(string: urlString) {
self.webView?.load(URLRequest(url: url))
}
} else {
self.webView?.load(URLRequest(url: URL(string: "https://bsky.app/?splash=true&clip=true")!))
}
}
func presentAppStoreOverlay() {
guard let windowScene = self.window.windowScene else {
return
}
let configuration = SKOverlay.AppClipConfiguration(position: .bottomRaised)
let overlay = SKOverlay(configuration: configuration)
overlay.present(in: windowScene)
}
func getHost(_ url: URL?) -> String? {
if #available(iOS 16.0, *) {
return url?.host()
} else {
return url?.host
}
}
func getQuery(_ url: URL?) -> String? {
if #available(iOS 16.0, *) {
return url?.query()
} else {
return url?.query
}
}
func urlMatchesPrevious(_ url: URL?) -> Bool {
if #available(iOS 16.0, *) {
return url?.query() == prevUrl?.query() && url?.host() == prevUrl?.host() && url?.query() == prevUrl?.query()
} else {
return url?.query == prevUrl?.query && url?.host == prevUrl?.host && url?.query == prevUrl?.query
}
}
}
struct WebViewActionPayload: Decodable {
enum Action: String, Decodable {
case present, store
}
let action: Action
let keyToStoreAs: String?
let jsonToStore: String?
}
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