(TP-110) feat: add FavouritesService interface and impl

Author: Kattsyn

rentplace/src/main/java/kattsyn/dev/rentplace/services/FavouritesService.java

@@ -0,0 +1,12 @@
+package kattsyn.dev.rentplace.services;
+
+import kattsyn.dev.rentplace.dtos.PropertyDTO;
+
+import java.util.List;
+
+public interface FavouritesService {
+
+    void addPropertyToFavourites(long propertyId, String userEmail);
+    void removePropertyFromFavourites(long propertyId, String userEmail);
+    List<PropertyDTO> getUserFavouritesByUserEmail(String userEmail);
+}

rentplace/src/main/java/kattsyn/dev/rentplace/services/impl/FavouritesServiceImpl.java

@@ -0,0 +1,59 @@
+package kattsyn.dev.rentplace.services.impl;
+
+import jakarta.transaction.Transactional;
+import kattsyn.dev.rentplace.dtos.PropertyDTO;
+import kattsyn.dev.rentplace.entities.Property;
+import kattsyn.dev.rentplace.entities.User;
+import kattsyn.dev.rentplace.exceptions.NotFoundException;
+import kattsyn.dev.rentplace.mappers.PropertyMapper;
+import kattsyn.dev.rentplace.repositories.PropertyRepository;
+import kattsyn.dev.rentplace.repositories.UserRepository;
+import kattsyn.dev.rentplace.services.FavouritesService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class FavouritesServiceImpl implements FavouritesService {
+
+    private final UserRepository userRepository;
+    private final PropertyRepository propertyRepository;
+    private final PropertyMapper propertyMapper;
+
+    private User getUserByEmail(String email) {
+        return userRepository.findByEmail(email).orElseThrow(
+                () -> new NotFoundException(String.format("User email %s NOT FOUND", email))
+        );
+    }
+
+    private Property getPropertyById(long propertyId) {
+        return propertyRepository.findById(propertyId).orElseThrow(
+                () -> new NotFoundException(String.format("Property id %s NOT FOUND", propertyId))
+        );
+    }
+
+    @Transactional
+    @Override
+    public void addPropertyToFavourites(long propertyId, String userEmail) {
+        User user = getUserByEmail(userEmail);
+        user.getFavourites().add(getPropertyById(propertyId));
+        userRepository.save(user);
+    }
+
+    @Transactional
+    @Override
+    public void removePropertyFromFavourites(long propertyId, String userEmail) {
+        User user = getUserByEmail(userEmail);
+        user.getFavourites().remove(getPropertyById(propertyId));
+        userRepository.save(user);
+    }
+
+    @Transactional
+    @Override
+    public List<PropertyDTO> getUserFavouritesByUserEmail(String userEmail) {
+        return propertyMapper.fromProperties(getUserByEmail(userEmail).getFavourites().stream().toList());
+    }
+
+}