initial

backend/src/main/java/net/moustos/mtgsearch/service/UserDetailsServiceImpl.java

@@ -0,0 +1,40 @@
+package net.moustos.mtgsearch.service;
+
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.core.userdetails.User;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.stereotype.Service;
+import net.moustos.mtgsearch.repository.UserRepository;
+
+import java.util.Collections;
+
+/**
+ * User details service for Spring Security
+ */
+@Service
+public class UserDetailsServiceImpl implements UserDetailsService {
+
+    private final UserRepository userRepository;
+
+    public UserDetailsServiceImpl(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        var user = userRepository.findByUsername(username)
+                .orElseThrow(() -> new UsernameNotFoundException("User not found: " + username));
+
+        return User.builder()
+                .username(user.getUsername())
+                .password(user.getPassword())
+                .authorities(Collections.singleton(new SimpleGrantedAuthority("ROLE_USER")))
+                .accountNonLocked(user.getActive())
+                .accountNonExpired(true)
+                .credentialsNonExpired(true)
+                .enabled(user.getActive())
+                .build();
+    }
+}