/*
 * Copyright 2017 The Mifos Initiative.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.mifos.anubis.filter;

import io.mifos.core.api.util.UserContextHolder;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author Myrle Krantz
 */
public class UserContextFilter extends OncePerRequestFilter {
  @Override
  protected void doFilterInternal(
      final HttpServletRequest request,
      final HttpServletResponse response,
      final FilterChain filterChain) throws ServletException, IOException {

    final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

    final String principalName = authentication.getName();
    final Object credentials = authentication.getCredentials();

    if (principalName != null && credentials != null) {
      UserContextHolder.setAccessToken(principalName, credentials.toString());
    }

    filterChain.doFilter(request, response);
  }
}