Added services

api/src/main/java/com/demo/imagebrowser/repository/FeedCategoryRepository.java

@@ -5,4 +5,5 @@
 
 public interface FeedCategoryRepository extends CrudRepository<FeedCategory, Long> {
     FeedCategory findByName(String name);
+    void deleteByName(String name);
 }

api/src/main/java/com/demo/imagebrowser/service/FeedService.java

@@ -0,0 +1,13 @@
+package com.demo.imagebrowser.service;
+
+import com.demo.imagebrowser.domain.Feed;
+import com.demo.imagebrowser.domain.FeedCategory;
+
+import java.util.List;
+
+public interface FeedService {
+    List<Feed> findByCategoryName(String categoryName);
+    void deleteCategoryByName(String categoryName);
+    FeedCategory addCategory(String categoryName);
+    Feed addFeed(Feed feed);
+}

api/src/main/java/com/demo/imagebrowser/service/impl/FeedServiceImpl.java

@@ -0,0 +1,48 @@
+package com.demo.imagebrowser.service.impl;
+
+import com.demo.imagebrowser.domain.Feed;
+import com.demo.imagebrowser.domain.FeedCategory;
+import com.demo.imagebrowser.repository.FeedCategoryRepository;
+import com.demo.imagebrowser.repository.FeedRepository;
+import com.demo.imagebrowser.service.FeedService;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.util.Collections;
+import java.util.List;
+
+public class FeedServiceImpl implements FeedService {
+
+    @Autowired
+    private FeedRepository feedRepository;
+
+    @Autowired
+    private FeedCategoryRepository feedCategoryRepository;
+
+    @Override
+    public List<Feed> findByCategoryName(String categoryName) {
+        FeedCategory category = feedCategoryRepository.findByName(categoryName);
+        if (category != null) {
+            return feedRepository.findByCategory(category);
+        } else {
+            return Collections.emptyList();
+        }
+    }
+
+    @Override
+    public void deleteCategoryByName(String categoryName) {
+        feedCategoryRepository.deleteByName(categoryName);
+    }
+
+    @Override
+    public FeedCategory addCategory(String categoryName) {
+        FeedCategory category = new FeedCategory();
+        category.setName(categoryName);
+        feedCategoryRepository.save(category);
+        return category;
+    }
+
+    @Override
+    public Feed addFeed(Feed feed) {
+        return feedRepository.save(feed);
+    }
+}

api/src/main/java/com/demo/imagebrowser/service/impl/UserDetailsService.java

@@ -0,0 +1,35 @@
+package com.demo.imagebrowser.service.impl;
+
+import com.demo.imagebrowser.domain.User;
+import com.demo.imagebrowser.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.stereotype.Component;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Component
+public class UserDetailsService implements org.springframework.security.core.userdetails.UserDetailsService {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Override
+    public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
+        User user = userRepository.findByUsername(s);
+
+        if (user == null) {
+            throw new UsernameNotFoundException(String.format("User with name %s does not exists", s));
+        }
+
+        List<GrantedAuthority> grantedAuthorities = new ArrayList<>();
+        user.getRoles().forEach(r -> grantedAuthorities.add(new SimpleGrantedAuthority(r.getRoleName())));
+
+        UserDetails details = new org.springframework.security.core.userdetails.User(user.getUsername(), user.getPassword(), grantedAuthorities);
+        return details;
+    }
+}