پیاده سازی Deep link در فلاتر

your_scheme://any_host

<key>CFBundleURLTypes</key>
<array>
<dict>
<key>CFBundleTypeRole</key>
<string>Editor</string>
<key>CFBundleURLName</key>
<string>deeplink.flutter.dev</string>
<key>CFBundleURLSchemes</key>
<array>
<string>poc</string>
</array>
</dict>
</array>

poc://deeplink.flutter.dev

<intent-filter>
  <action android:name="android.intent.action.VIEW" />
  <category android:name="android.intent.category.DEFAULT" />
  <category android:name="android.intent.category.BROWSABLE" />
  <data
    android:scheme="poc"
    android:host="deeplink.flutter.dev" />
</intent-filter>

private val CHANNEL = "poc.deeplink.flutter.dev/channel"
private var startString: String? = null
override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
    GeneratedPluginRegistrant.registerWith(flutterEngine)

    MethodChannel(flutterEngine.dartExecutor, CHANNEL).setMethodCallHandler { call, result ->
        if (call.method == "initialLink") {
            if (startString != null) {
                result.success(startString)
            }
        }
    }
}
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    val intent = getIntent()
    startString = intent.data?.toString()
}

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  
  private var methodChannel: FlutterMethodChannel?
  
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
  ) -> Bool {
    
    let controller = window.rootViewController as! FlutterViewController
    methodChannel = FlutterMethodChannel(name: "poc.deeplink.flutter.dev/cnannel", binaryMessenger: controller)
   
    methodChannel?.setMethodCallHandler({ (call: FlutterMethodCall, result: FlutterResult) in
      guard call.method == "initialLink" else {
        result(FlutterMethodNotImplemented)
        return
      }
    })
    
    
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }

private val EVENTS = "poc.deeplink.flutter.dev/events"
private var linksReceiver: BroadcastReceiver? = null

override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
    GeneratedPluginRegistrant.registerWith(flutterEngine)

    EventChannel(flutterEngine.dartExecutor, EVENTS).setStreamHandler(
            object : EventChannel.StreamHandler {
                override fun onListen(args: Any?, events: EventSink) {
                    linksReceiver = createChangeReceiver(events)
                }

                override fun onCancel(args: Any?) {
                    linksReceiver = null
                }
            }
    )
}
override fun onNewIntent(intent: Intent) {
    super.onNewIntent(intent)
    if (intent.action === Intent.ACTION_VIEW) {
        linksReceiver?.onReceive(this.applicationContext, intent)
    }
}


fun createChangeReceiver(events: EventSink): BroadcastReceiver? {
    return object : BroadcastReceiver() {
        override fun onReceive(context: Context, intent: Intent) { // NOTE: assuming intent.getAction() is Intent.ACTION_VIEW
            val dataString = intent.dataString ?:
            events.error("UNAVAILABLE", "Link unavailable", null)
            events.success(dataString)
        }
    }
}

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  private var eventChannel: FlutterEventChannel?
  
  private let linkStreamHandler = LinkStreamHandler()
  
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
  ) -> Bool {
    
    let controller = window.rootViewController as! FlutterViewController
    eventChannel = FlutterEventChannel(name: "poc.deeplink.flutter.dev/events", binaryMessenger: controller)
       
    GeneratedPluginRegistrant.register(with: self)
    eventChannel?.setStreamHandler(linkStreamHandler)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
  
  override func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    eventChannel?.setStreamHandler(linkStreamHandler)
    return linkStreamHandler.handleLink(url.absoluteString)
  }
}


class LinkStreamHandler:NSObject, FlutterStreamHandler {
  
  var eventSink: FlutterEventSink?
  
  // links will be added to this queue until the sink is ready to process them
  var queuedLinks = [String]()
  
  func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
    self.eventSink = events
    queuedLinks.forEach({ events($0) })
    queuedLinks.removeAll()
    return nil
  }
  
  func onCancel(withArguments arguments: Any?) -> FlutterError? {
    self.eventSink = nil
    return nil
  }
  
  func handleLink(_ link: String) -> Bool {
    guard let eventSink = eventSink else {
      queuedLinks.append(link)
      return false
    }
    eventSink(link)
    return true
  }
}

class DeepLinkBloc extends Bloc {

  //Event Channel creation
  static const stream = const EventChannel('poc.deeplink.flutter.dev/events');

  //Method channel creation
  static const platform = const MethodChannel('poc.deeplink.flutter.dev/channel');

  StreamController<String> _stateController = StreamController();

  Stream<String> get state => _stateController.stream;

  Sink<String> get stateSink => _stateController.sink;


  //Adding the listener into contructor
  DeepLinkBloc() {
    //Checking application start by deep link
    startUri().then(_onRedirected);
    //Checking broadcast stream, if deep link was clicked in opened appication
    stream.receiveBroadcastStream().listen((d) => _onRedirected(d));
  }


  _onRedirected(String uri) {
    // Here can be any uri analysis, checking tokens etc, if it’s necessary
    // Throw deep link URI into the BloC's stream
    stateSink.add(uri);
  }


  @override
  void dispose() {
    _stateController.close();
  }


  Future<String> startUri() async {
    try {
      return platform.invokeMethod('initialLink');
    } on PlatformException catch (e) {
      return "Failed to Invoke: '${e.message}'.";
    }
  }
}

class PocWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    DeepLinkBloc _bloc = Provider.of<DeepLinkBloc>(context);
    return StreamBuilder<String>(
      stream: _bloc.state,
      builder: (context, snapshot) {
        if (!snapshot.hasData) {
          return Container(
              child: Center(
                  child: Text('No deep link was used  ')));
        } else {
          return Container(
              child: Center(
                  child: Padding(
                      padding: EdgeInsets.all(20.0),
                      child: Text('Redirected: ${snapshot.data}'))));
        }
      },
    );
  }
}

poc://deeplink.flutter.dev