main: auto-launch from URL scheme

Resolves #3

Jitterbug/DeviceDetailsView.swift

@@ -75,7 +75,7 @@ struct DeviceDetailsView: View {
                                     launchApplication(app)
                                 } label: {
                                     AppItemView(app: app, saved: true, hostIdentifier: host.identifier)
-                                }
+                                }.appContextMenu(host: host, app: app)
                             }
                         }
                     }
@@ -85,7 +85,7 @@ struct DeviceDetailsView: View {
                                 launchApplication(app)
                             } label: {
                                 AppItemView(app: app, saved: false, hostIdentifier: host.identifier)
-                            }
+                            }.appContextMenu(host: host, app: app)
                         }
                     }
                 }
@@ -157,6 +157,14 @@ struct DeviceDetailsView: View {
                     }
                 }
             }
+        }.onChange(of: main.selectedLaunchAppId) { appId in
+            guard apps.count > 0 else {
+                return
+            }
+            guard let autoLaunchApp = try? main.processAutoLaunch(withApps: apps) else {
+                return
+            }
+            launchApplication(autoLaunchApp)
         }
     }
 
@@ -195,11 +203,17 @@ struct DeviceDetailsView: View {
     }
 
     private func refreshAppsList(onSuccess: @escaping () -> Void) {
+        var autoLaunchApp: JBApp?
         main.backgroundTask(message: NSLocalizedString("Querying installed apps...", comment: "DeviceDetailsView")) {
             try host.updateInfo()
             apps = try host.installedApps()
             main.archiveSavedHosts()
+            autoLaunchApp = try main.processAutoLaunch(withApps: apps)
             onSuccess()
+        } onComplete: {
+            if let app = autoLaunchApp {
+                launchApplication(app)
+            }
         }
     }
 
@@ -251,6 +265,29 @@ struct DeviceDetailsView: View {
     }
 }
 
+struct AppContextMenuViewModifier: ViewModifier {
+    @EnvironmentObject private var main: Main
+    let host: JBHostDevice
+    let app: JBApp
+
+    func body(content: Content) -> some View {
+        content.contextMenu {
+            Button {
+                UIPasteboard.general.url = main.encodeURL(forHost: host, launchingApp: app)
+            } label: {
+                Label("Copy Shortcut URL", systemImage: "link")
+                    .labelStyle(DefaultLabelStyle())
+            }
+        }
+    }
+}
+
+extension View {
+    func appContextMenu(host: JBHostDevice, app: JBApp) -> some View {
+        self.modifier(AppContextMenuViewModifier(host: host, app: app))
+    }
+}
+
 struct DeviceDetailsView_Previews: PreviewProvider {
     static var previews: some View {
         DeviceDetailsView(host: JBHostDevice(hostname: "", address: Data()))

Jitterbug/DeviceListView.swift

@@ -101,6 +101,14 @@ struct ContextMenuViewModifier: ViewModifier {
 
     func body(content: Content) -> some View {
         content.contextMenu {
+            #if os(iOS)
+            Button {
+                UIPasteboard.general.url = main.encodeURL(forHost: host)
+            } label: {
+                Label("Copy Shortcut URL", systemImage: "link")
+                    .labelStyle(DefaultLabelStyle())
+            }
+            #endif
             Button {
                 main.savePairing(nil, forHostIdentifier: host.identifier)
                 main.saveDiskImage(nil, signature: nil, forHostIdentifier: host.identifier)

Jitterbug/Info.plist

@@ -29,6 +29,18 @@
 	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
 	<key>CFBundleShortVersionString</key>
 	<string>$(MARKETING_VERSION)</string>
+	<key>CFBundleURLTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleURLName</key>
+			<string>com.osy86.Jitterbug</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<string>jitterbug</string>
+			</array>
+		</dict>
+		<dict/>
+	</array>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>LSRequiresIPhoneOS</key>

Jitterbug/JitterbugApp.swift

@@ -30,6 +30,9 @@ struct JitterbugApp: App {
         WindowGroup {
             ContentView()
                 .environmentObject(main)
+                .onOpenURL { url in
+                    main.loadURL(url)
+                }
         }
         .onChange(of: scenePhase) { newScenePhase in
             if newScenePhase == .active {

Jitterbug/Main.swift

@@ -29,6 +29,7 @@ class Main: NSObject, ObservableObject {
     @Published var savedHosts: [JBHostDevice] = []
     @Published var foundHosts: [JBHostDevice] = []
     @Published var selectedHostId: String?
+    @Published var selectedLaunchAppId: String?
 
     @Published var pairings: [URL] = []
     @Published var supportImages: [URL] = []
@@ -542,3 +543,55 @@ extension Main {
         manager.connection.stopVPNTunnel()
     }
 }
+
+// MARK: - URL parsing
+extension Main {
+    func encodeURL(forHost host: JBHostDevice, launchingApp app: JBApp? = nil) -> URL {
+        var components = URLComponents()
+        components.scheme = "jitterbug"
+        components.host = host.identifier
+        if let app = app {
+            components.queryItems = [
+                URLQueryItem(name: "launch", value: app.bundleIdentifier)
+            ]
+        }
+        return components.url!
+    }
+
+    func loadURL(_ url: URL) {
+        let components = URLComponents(url: url, resolvingAgainstBaseURL: false)!
+        guard components.scheme == "jitterbug" else {
+            if components.scheme != "file" {
+                print("[URL] unknown scheme \(String(describing: components.scheme))")
+            }
+            return
+        }
+        selectedHostId = components.host
+        guard let queryItems = components.queryItems else {
+            print("[URL] no query to handle")
+            return
+        }
+        for item in queryItems {
+            if item.name == "launch" {
+                selectedLaunchAppId = item.value
+            }
+        }
+    }
+
+    func processAutoLaunch(withApps apps: [JBApp]) throws -> JBApp? {
+        guard let launchId = selectedLaunchAppId else {
+            return nil
+        }
+        DispatchQueue.main.async {
+            self.selectedLaunchAppId = nil
+        }
+        let selectedApp = apps.first { app in
+            app.bundleIdentifier == launchId
+        }
+        if let selectedApp = selectedApp {
+            return selectedApp
+        } else {
+            throw NSLocalizedString("Cannot find \(launchId)", comment: "Main")
+        }
+    }
+}