refactor: removing CustomUserDetailService

src/main/java/com/behl/cerberus/filter/JwtAuthenticationFilter.java

@@ -0,0 +1,54 @@
+package com.behl.cerberus.filter;
+
+import java.util.List;
+
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import com.behl.cerberus.repository.UserRepository;
+import com.behl.cerberus.utility.JwtUtility;
+
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+
+@Component
+@RequiredArgsConstructor
+public class JwtAuthenticationFilter extends OncePerRequestFilter {
+
+	private final JwtUtility jwtUtils;
+	private final UserRepository userRepository;
+
+	private static final String AUTHORIZATION_HEADER = "Authorization";
+	private static final String BEARER_PREFIX = "Bearer ";
+
+	@Override
+	@SneakyThrows
+	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) {
+		final var authorizationHeader = request.getHeader(AUTHORIZATION_HEADER);
+
+		if (StringUtils.isNotEmpty(authorizationHeader)) {
+			if (authorizationHeader.startsWith(BEARER_PREFIX)) {
+				final var token = authorizationHeader.replace(BEARER_PREFIX, StringUtils.EMPTY);
+				final var userId = jwtUtils.extractUserId(token);
+				final var isTokenValid = jwtUtils.validateToken(token, userId);
+
+				if (Boolean.TRUE.equals(isTokenValid)) {
+					final var user = userRepository.findById(userId).orElseThrow(IllegalStateException::new);
+					final var authentication = new UsernamePasswordAuthenticationToken(
+							user.getEmailId(), user.getPassword(), List.of());
+					authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
+					SecurityContextHolder.getContext().setAuthentication(authentication);
+				}
+			}
+		}
+		filterChain.doFilter(request, response);
+	}
+
+}