Revert "????????"

This reverts commit bc1e598987.

api/src/main/java/be/naaturel/boardmateapi/services/ClientService.java

@@ -0,0 +1,56 @@
+package be.naaturel.boardmateapi.services;
+
+import be.naaturel.boardmateapi.common.exceptions.ServiceException;
+import be.naaturel.boardmateapi.common.models.Client;
+import be.naaturel.boardmateapi.repository.ClientRepo;
+import be.naaturel.boardmateapi.repository.dtos.ClientDto;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+
+import java.util.UUID;
+
+import static java.util.UUID.randomUUID;
+
+@Service
+public class ClientService {
+
+    private final ClientRepo repo;
+    private final PasswordEncoder passwordEncoder;
+
+    @Autowired
+    public ClientService(ClientRepo repo, PasswordEncoder passwordEncoder){
+        this.repo = repo;
+        this.passwordEncoder = passwordEncoder;
+    }
+
+    public Client authenticate(String username, String key) throws ServiceException {
+        try {
+            ClientDto dto = repo.findByServiceUsername(username)
+                    .orElseThrow(() -> new RuntimeException("Invalid username"));
+
+            if (passwordEncoder.matches(key, dto.getServiceKey())) {
+                return new Client(dto.getClientId(), dto.getName(), dto.getServiceUsername(), dto.getServiceKey());
+            } else {
+                throw new RuntimeException("Invalid username or password");
+            }
+        } catch (Exception e){
+            throw new ServiceException("Authentication failed", e);
+        }
+    }
+
+    public String create(String name, String username, String key) throws ServiceException {
+        try{
+            ClientDto dto = new ClientDto();
+            dto.setClientId(randomUUID().toString());
+            dto.setName(name);
+            dto.setServiceUsername(username);
+            String encodedKey = passwordEncoder.encode(key);
+            dto.setServiceKey(encodedKey);
+            ClientDto result = repo.save(dto);
+            return result.getClientId();
+        } catch (Exception e){
+            throw new ServiceException("Unable to create client", e);
+        }
+    }
+}