content: /*
   This file is part of Airsonic.
  
   Airsonic 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.
  
   Airsonic 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 Airsonic.  If not, see <http://www.gnu.org/licenses/>.
  
   Copyright 2016 (C) Airsonic Authors
   Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
   */
  package org.airsonic.player.controller;
  
  import org.airsonic.player.domain.MediaFile;
  import org.airsonic.player.domain.PlayQueue;
  import org.airsonic.player.domain.Player;
  import org.airsonic.player.service.JWTSecurityService;
  import org.airsonic.player.service.NetworkService;
  import org.airsonic.player.service.PlayerService;
  import org.airsonic.player.service.TranscodingService;
  import org.airsonic.player.util.StringUtil;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.servlet.ModelAndView;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import java.io.PrintWriter;
  import java.util.List;
  
  /**
   * Controller which produces the M3U playlist.
   *
   * @author Sindre Mehus
   */
  @Controller
  @RequestMapping("/play.m3u")
  public class M3UController {
  
      @Autowired
      private PlayerService playerService;
      @Autowired
      private TranscodingService transcodingService;
      @Autowired
      private JWTSecurityService jwtSecurityService;
  
      @GetMapping
      public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
          response.setContentType("audio/x-mpegurl");
          response.setCharacterEncoding(StringUtil.ENCODING_UTF8);
  
          Player player = playerService.getPlayer(request, response);
  
          String url = NetworkService.getBaseUrl(request);
          url = url + "ext/stream?";
  
          if (player.isExternalWithPlaylist()) {
              createClientSidePlaylist(response.getWriter(), player, url);
          } else {
              createServerSidePlaylist(response.getWriter(), player, url);
          }
          return null;
      }
  
      private void createClientSidePlaylist(PrintWriter out, Player player, String url) {
          if (player.isM3uBomEnabled()) {
              out.print("\ufeff");
          }
          out.println("#EXTM3U");
          List<MediaFile> result;
          synchronized (player.getPlayQueue()) {
              result = player.getPlayQueue().getFiles();
          }
          for (MediaFile mediaFile : result) {
              Integer duration = mediaFile.getDurationSeconds();
              if (duration == null) {
                  duration = -1;
              }
              out.println("#EXTINF:" + duration + "," + mediaFile.getArtist() + " - " + mediaFile.getTitle());
  
              String urlNoAuth = url + "player=" + player.getId() + "&id=" + mediaFile.getId() + "&suffix=." +
                      transcodingService.getSuffix(player, mediaFile, null);
              String urlWithAuth = jwtSecurityService.addJWTToken(urlNoAuth);
              out.println(urlWithAuth);
          }
      }
  
      private void createServerSidePlaylist(PrintWriter out, Player player, String url) {
  
          url += "player=" + player.getId();
  
          // Get suffix of current file, e.g., ".mp3".
          String suffix = getSuffix(player);
          if (suffix != null) {
              url += "&suffix=." + suffix;
          }
  
          if (player.isM3uBomEnabled()) {
              out.print("\ufeff");
          }
          out.println("#EXTM3U");
          out.println("#EXTINF:-1,Airsonic");
          out.println(jwtSecurityService.addJWTToken(url));
      }
  
      private String getSuffix(Player player) {
          PlayQueue playQueue = player.getPlayQueue();
          return playQueue.isEmpty() ? null : transcodingService.getSuffix(player, playQueue.getFile(0), null);
      }
  
  }
  