Starter Packs (#4332)

Co-authored-by: Dan Abramov <dan.abramov@gmail.com>
Co-authored-by: Paul Frazee <pfrazee@gmail.com>
Co-authored-by: Eric Bailey <git@esb.lol>
Co-authored-by: Samuel Newman <mozzius@protonmail.com>

modules/BlueskyClip/AppDelegate.swift

@@ -0,0 +1,32 @@
+import UIKit
+
+@main
+class AppDelegate: UIResponder, UIApplicationDelegate {
+  var window: UIWindow?
+  var controller: ViewController?
+
+  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+    let window = UIWindow()
+    self.window = UIWindow()
+
+    let controller = ViewController(window: window)
+    self.controller = controller
+
+    window.rootViewController = self.controller
+    window.makeKeyAndVisible()
+
+    return true
+  }
+
+  func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey: Any] = [:]) -> Bool {
+    self.controller?.handleURL(url: url)
+    return true
+  }
+
+  func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool {
+      if let incomingURL = userActivity.webpageURL {
+        self.controller?.handleURL(url: incomingURL)
+      }
+      return true
+  }
+}

modules/BlueskyClip/Images.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,14 @@
+{
+  "images" : [
+    {
+      "filename" : "App-Icon-1024x1024@1x.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

modules/BlueskyClip/Images.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

modules/BlueskyClip/ViewController.swift

@@ -0,0 +1,133 @@
+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
+  }
+
+  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:
+      guard let url = self.starterPackUrl else {
+        return
+      }
+
+      self.presentAppStoreOverlay()
+      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 url.pathComponents.count == 4,
+       url.pathComponents[1] == "start" {
+      self.starterPackUrl = url
+    }
+
+    return .allow
+  }
+
+  func handleURL(url: URL) {
+    let urlString = "\(url.absoluteString)?clip=true"
+    if let url = URL(string: urlString) {
+      self.webView?.load(URLRequest(url: url))
+    }
+  }
+
+  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?
+}