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/*
 * Copyright © 2015 - 2021 ReSys ([email protected])
 *
 * 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.dialob.questionnaire.service.sockjs;

import edu.umd.cs.findbugs.annotations.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.HandshakeInterceptor;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

@Slf4j
public class ExtractURIParametersToAttributesInterceptor implements HandshakeInterceptor {

  private final List attributesToExtract = new ArrayList<>();

  public ExtractURIParametersToAttributesInterceptor(String... attributesToExtract) {
    this.attributesToExtract.addAll(Arrays.asList(attributesToExtract));
  }

  @Override
  public boolean beforeHandshake(@NonNull final ServerHttpRequest request, @NonNull final ServerHttpResponse response, @NonNull final WebSocketHandler wsHandler, @NonNull final Map attributes) throws Exception {
    if (request instanceof ServletServerHttpRequest serverRequest) {
      var servletRequest = serverRequest.getServletRequest();
      for (var name : attributesToExtract) {
        String parameter = servletRequest.getParameter(name);
        if (parameter != null) {
          attributes.put(name, parameter);
        }
      }
    }
    return true;
  }

  @Override
  public void afterHandshake(@NonNull final ServerHttpRequest request, @NonNull final ServerHttpResponse response, @NonNull final WebSocketHandler wsHandler, final Exception exception) {
    // Nothing todo
  }
}