Nfc reader (#2)

* added pn532.jar

* added pn532

* changed KartenLeserer

* added leser to BackendServer

* added welcheKarteSticht methode

* added welcheKarteSticht methode

* added sendKarte tofrontend when scanned

* added build config

* installed pn532 as local dependency

* added local dependency to pom

* edited KartenLeser

* edited KartenLeser

* edited KartenLeser

* edited KartenLeser

* edited pom

* edited pom

* edited pom

* deleted unused files

* added led

* added led

* added right dot env path

* added right dot env path

* added waitForScanMethod

* added waitForScanMethod

* added waitForScanMethod

* added waitForScanMethod

* added waitForScanMethod

* added waitForScanMethod

* removed unused print statements

* removed unused imports

* removed pn532 jar

* removed pn532 jar

src/main/java/org/example/BackendServer.java

@@ -13,6 +13,7 @@ import org.eclipse.jetty.websocket.server.config.JettyWebSocketServletContainerI
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CountDownLatch;
 
 import org.eclipse.jetty.servlet.FilterHolder;
 import org.eclipse.jetty.servlets.CrossOriginFilter;
@@ -33,17 +34,25 @@ public class BackendServer
     private final ServerConnector connector;
 
     private final Schafkopf schafkopfGame;
+    private final KartenLeser nfcLeser;
+    private CountDownLatch nfcLatch = new CountDownLatch(1);
+
+    private Boolean readingMode = false;
+    private String uidString = "";
 
     public BackendServer()
     {
-        Dotenv dotenv = Dotenv.configure().load();
+        Dotenv dotenv = Dotenv.configure().directory("./").load();
         server = new Server();
         InetSocketAddress address = new InetSocketAddress(dotenv.get("VITE_APP_WEBSOCKET_IP"), 8080);
         connector = new ServerConnector(server);
         connector.setHost(address.getHostName());
         connector.setPort(address.getPort());
         server.addConnector(connector);
+        
         schafkopfGame = new Schafkopf(this);
+        nfcLeser = new KartenLeser(this);
+
         // Setup the basic application "context" for this application at "/"
         // This is also known as the handler tree (in jetty speak)
         ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
@@ -133,4 +142,23 @@ public class BackendServer
     public void showFarbe() {
         schafkopfGame.showFarbe();
     }
+    public void nfcGelesen(String uidString) {
+        if(this.uidString.equals(uidString)){
+            return;
+        }
+        if(!this.readingMode){
+            return;
+        }
+
+        this.uidString = uidString;
+        nfcLatch.countDown();
+    }
+
+    public String waitForCardScan() throws InterruptedException {
+        this.readingMode = true;
+        nfcLatch.await();
+        this.readingMode = false;
+        nfcLatch = new CountDownLatch(1);
+        return this.uidString;
+    }
 }

src/main/java/org/example/KartenLeser.java

@@ -0,0 +1,72 @@
+package org.example;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.pi4j.Pi4J;
+import com.pi4j.io.i2c.I2C;
+import mk.hsilomedus.pn532.*;
+import mk.hsilomedus.pn532.Pn532SamThread.Pn532SamThreadListener;
+
+public final class KartenLeser {
+    
+    private static BackendServer server;
+
+    public KartenLeser(BackendServer server){
+        this.server = server;
+
+       new Thread(() -> {
+
+      new KartenListener().run();
+
+       }).start();
+    }
+
+
+
+    public static final void main(String[] args) throws IOException {
+   
+    }
+
+    private static class KartenListener implements Pn532SamThreadListener {
+
+        @SuppressWarnings("rawtypes")
+        Pn532SamThread<I2C> i2cThread = new Pn532SamThread<>(this, new Pn532I2c());
+
+
+        public void run() {
+            Pn532ContextHelper.initialize();
+            i2cThread.start();
+        }
+
+        public void close() {
+            closeThread(i2cThread);
+            Pn532ContextHelper.shutdown();
+        }
+
+        @Override
+        public void receiveMessage(String message) {
+            System.out.println(message);
+        }
+
+        @Override
+        public void uidReceived(String displayName, byte[] uid) {
+            server.nfcGelesen(Pn532SamThreadListener.getUidString(uid) );
+        }
+
+        @SuppressWarnings("rawtypes")
+        private void closeThread(Pn532SamThread thread) {
+            if (thread != null && thread.isAlive()) {
+                thread.close();
+
+                try {
+                    thread.join();
+                } catch (InterruptedException e) {
+                    System.out.println("Error closing thread: " + e.getMessage());
+                    Thread.currentThread().interrupt();
+                }
+            }
+        }
+    }
+}

src/main/java/org/example/KartenUtil.java

@@ -76,6 +76,89 @@ public class KartenUtil {
         return cardName;
     }
 
+    public static String getIdOfUid(String uid){
+        switch (uid){
+            case "04A56BB4780000":
+                return "eichel_7";
+            case "04A46BB4780000":
+                return "eichel_8";
+            case "04A26BB4780000":
+                return "eichel_9";
+            case "04A16BB4780000":
+                return "eichel_x";
+            case "049E6BB4780000":
+                return "eichel_k";
+            case "04A86BB4780000":
+                return "eichel_a";
+            case "04A06BB4780000":
+                return "eichel_u";
+            case "049F6BB4780000":
+                return "eichel_o";
+
+            case "04F26BB4780000":
+                return "blatt_7";
+            case "04A76BB4780000":
+                return "blatt_8";
+            case "049B6BB4780000":
+                return "blatt_9";
+            case "04996BB4780000":
+                return "blatt_x";
+            case "041CD2C2126F81":
+                return "blatt_k";
+            case "04A96BB4780000":
+                return "blatt_a";
+            case "049A6BB4780000":
+                return "blatt_u";
+            case "049D6BB4780000":
+                return "blatt_o";
+
+            case "04936BB4780000":
+                return "schell_7";
+            case "04F697C2126F80":
+                return "schell_8";
+            case "04946BB4780000":
+                return "schell_9";
+            case "04956BB4780000":
+                return "schell_x";
+            case "04986BB4780000":
+                return "schell_k";
+            case "04AA6BB4780000":
+                return "schell_a";
+            case "04966BB4780000":
+                return "schell_u";
+            case "04976BB4780000":
+                return "schell_o";
+
+            case "04F36BB4780000":
+                return "herz_7";
+            case "04B06BB4780000":
+                return "herz_8";
+            case "04AF6BB4780000":
+                return "herz_9";
+            case "04AE6BB4780000":
+                return "herz_x";
+            case "04AB6BB4780000":
+                return "herz_k";
+            case "049C6BB4780000":
+                return "herz_a";
+            case "04AD6BB4780000":
+                return "herz_u";
+            case "04AC6BB4780000":
+                return "herz_o";
+        }
+        return null;
+    }
+
+    public static Karte getKarteById(String id){
+        List<Karte> kartenList = initializeSchafKopfCardDeck();
+        for (Karte karte : kartenList) {
+            if (karte.getId().equalsIgnoreCase(id)) {
+                return karte;
+            }
+        }
+        return null;
+    }
+
     public static void removeCards(List<Karte> allCards, List<Karte> cardsToRemove) {
         allCards.removeAll(cardsToRemove);
     }

src/main/java/org/example/Schafkopf.java

@@ -78,7 +78,6 @@ public class Schafkopf {
             String karteJson = gson.toJson(karte);
             server.sendMessageToAllFrontendEndpoints(karteJson);
         }
-
     }
 
     public void showFarbe() {