content: /*
   * Copyright (c) 2014 Amahi
   *
   * This file is part of Amahi.
   *
   * Amahi is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * Amahi is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with Amahi. If not, see <http ://www.gnu.org/licenses/>.
   */
  
  package org.amahi.anywhere.server;
  
  import android.content.Context;
  
  import org.amahi.anywhere.util.Identifier;
  
  import java.io.IOException;
  
  import okhttp3.Interceptor;
  import okhttp3.Request;
  import okhttp3.Response;
  
  
  /**
   * API headers accessor.
   */
  class ApiHeaders implements Interceptor {
      private final String acceptHeader;
      private final String userAgentHeader;
  
      public ApiHeaders(Context context) {
          this.acceptHeader = getAcceptHeader();
          this.userAgentHeader = getUserAgentHeader(context);
      }
  
      private String getAcceptHeader() {
          return "application/json";
      }
  
      private String getUserAgentHeader(Context context) {
          return Identifier.getUserAgent(context);
      }
  
      @Override
      public Response intercept(Chain chain) throws IOException {
          Request original = chain.request();
          Request request = original.newBuilder()
              .addHeader(HeaderFields.ACCEPT, acceptHeader)
              .addHeader(HeaderFields.USER_AGENT, userAgentHeader)
              .method(original.method(), original.body())
              .build();
  
          return chain.proceed(request);
      }
  
      private static final class HeaderFields {
          public static final String ACCEPT = "Accept";
          public static final String USER_AGENT = "User-Agent";
  
          private HeaderFields() {
          }
      }
  }
  