chore: Remove old Anhang and add some code to the docs

projektdokumentation/Listings/CoinflipController.java

@@ -0,0 +1,38 @@
+package de.szut.casino.coinflip;
+
+import de.szut.casino.exceptionHandling.exceptions.InsufficientFundsException;
+import de.szut.casino.exceptionHandling.exceptions.UserNotFoundException;
+import de.szut.casino.shared.service.BalanceService;
+import de.szut.casino.user.UserEntity;
+import de.szut.casino.user.UserService;
+import jakarta.validation.Valid;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Optional;
+
+@RestController
+public class CoinflipController {
+    private final UserService userService;
+    private final BalanceService balanceService;
+    private final CoinflipService coinflipService;
+
+    public CoinflipController(UserService userService, BalanceService balanceService, CoinflipService coinflipService) {
+        this.userService = userService;
+        this.balanceService = balanceService;
+        this.coinflipService = coinflipService;
+    }
+
+    @PostMapping("/coinflip")
+    public ResponseEntity<Object> coinFlip(@RequestBody @Valid CoinflipDto coinflipDto) {
+        UserEntity user = userService.getCurrentUser();
+
+        if (!this.balanceService.hasFunds(user, coinflipDto)) {
+            throw new InsufficientFundsException();
+        }
+
+        return ResponseEntity.ok(coinflipService.play(user, coinflipDto));
+    }
+}