Deep Linking

Sources/DeepLinking/
├── DeepLinkRouter.swift       # Central router
├── DeepLink.swift             # Route definitions
└── UniversalLinkHandler.swift # Universal link processing

Sources/AppIntents/
├── OpenContentIntent.swift    # Open specific content
├── AppShortcuts.swift         # Shortcuts provider
└── ContentEntity.swift        # Entities for Spotlight/Siri

.well-known/
└── apple-app-site-association  # AASA file template

enum DeepLink: Equatable {
    case home
    case profile(userId: String)
    case item(itemId: String)
    case settings
    case action(ActionType)

    enum ActionType {
        case share(itemId: String)
        case create
    }
}

extension DeepLink {
    init?(url: URL) {
        guard let components = URLComponents(url: url, resolvingAgainstBaseURL: true) else {
            return nil
        }

        let pathComponents = components.path.split(separator: "/").map(String.init)

        switch pathComponents {
        case ["users", let userId]:
            self = .profile(userId: userId)
        case ["items", let itemId]:
            self = .item(itemId: itemId)
        case ["settings"]:
            self = .settings
        default:
            self = .home
        }
    }
}

@main
struct MyApp: App {
    @State private var router = DeepLinkRouter()

    var body: some Scene {
        WindowGroup {
            ContentView()
                .environment(router)
                .onOpenURL { url in
                    router.handle(url)
                }
        }
    }
}

struct OpenItemIntent: OpenIntent {
    static let title: LocalizedStringResource = "Open Item"

    @Parameter(title: "Item")
    var target: ItemEntity

    func perform() async throws -> some IntentResult {
        await router.navigate(to: .item(itemId: target.id))
        return .result()
    }
}

struct AppShortcuts: AppShortcutsProvider {
    static var appShortcuts: [AppShortcut] {
        AppShortcut(
            intent: OpenItemIntent(),
            phrases: [
                "Open \(\.$target) in \(.applicationName)",
                "Show \(\.$target)"
            ],
            shortTitle: "Open Item",
            systemImageName: "doc"
        )
    }
}

<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleURLSchemes</key>
        <array>
            <string>myapp</string>
        </array>
        <key>CFBundleURLName</key>
        <string>com.yourcompany.myapp</string>
    </dict>
</array>

<key>com.apple.developer.associated-domains</key>
<array>
    <string>applinks:yourapp.com</string>
    <string>applinks:www.yourapp.com</string>
</array>

{
  "applinks": {
    "apps": [],
    "details": [
      {
        "appID": "TEAMID.com.yourcompany.yourapp",
        "paths": [
          "/items/*",
          "/users/*",
          "/share/*"
        ]
      }
    ]
  }
}

@main
struct MyApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
                .onOpenURL { url in
                    handleDeepLink(url)
                }
        }
    }
}

// In SceneDelegate
func scene(_ scene: UIScene, continue userActivity: NSUserActivity) {
    guard userActivity.activityType == NSUserActivityTypeBrowsingWeb,
          let url = userActivity.webpageURL else {
        return
    }
    handleUniversalLink(url)
}

# Simulator
xcrun simctl openurl booted "myapp://items/123"

# Device
# Open Safari and navigate to myapp://items/123

# Test AASA file
curl -I "https://yourapp.com/.well-known/apple-app-site-association"
# Should return Content-Type: application/json

# Validate with Apple
# Use Apple's tool or Branch.io validator