src/callback.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008-2009 by Andrzej Rybczak                            *
   3  *   electricityispower@gmail.com                                          *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
  19  ***************************************************************************/
  20
  21 #include <curl/curl.h>
  22 #include <cstring>
  23
  24 #include "callback.h"
  25 #include "misc.h"
  26 #include "scrobby.h"
  27 #include "song.h"
  28
  29 using std::string;
  30
  31 extern Handshake myHandshake;
  32 extern MPD::Song s;
  33
  34 void ScrobbyErrorCallback(MPD::Connection *, int, string errormessage, void *)
  35 {
  36         IgnoreNewlines(errormessage);
  37         Log(llVerbose, "MPD: %s", errormessage.c_str());
  38 }
  39
  40 void ScrobbyStatusChanged(MPD::Connection *Mpd, MPD::StatusChanges changed, void *)
  41 {
  42         static MPD::State old_state = MPD::psUnknown;
  43         static MPD::State current_state = MPD::psUnknown;
  44
  45         if (changed.Playlist)
  46         {
  47                 // now playing song's metadata could change, so update it
  48                 s.SetData(Mpd->CurrentSong());
  49         }
  50         if (changed.State)
  51         {
  52                 old_state = current_state;
  53                 current_state = Mpd->GetState();
  54                 if (old_state == MPD::psStop && current_state == MPD::psPlay)
  55                         changed.SongID = 1;
  56         }
  57         if (changed.ElapsedTime)
  58         {
  59
  60                 if (Mpd->GetElapsedTime() == Mpd->GetCrossfade() + 2)
  61                         changed.SongID = 1;
  62                 s.Playback++;
  63         }
  64         if (changed.SongID || (old_state == MPD::psPlay && current_state == MPD::psStop))
  65         {
  66                 s.Submit();
  67
  68                 // in this case allow entering only once
  69                 if (old_state == MPD::psPlay && current_state == MPD::psStop)
  70                         old_state = MPD::psUnknown;
  71
  72                 if (Mpd->GetElapsedTime() < Mpd->GetCrossfade()+curl_connecttimeout+curl_timeout)
  73                         time(&s.StartTime);
  74
  75                 if (current_state == MPD::psPlay || current_state == MPD::psPause)
  76                 {
  77                         s.SetData(Mpd->CurrentSong());
  78                         MPD::Song::NowPlayingNotify = s.Queue.size()+s.SubmitQueue.size() != 1 && s.Data && !s.isStream();
  79                 }
  80         }
  81
  82         if (!MPD::Song::NowPlayingNotify || !s.Data)
  83                  return;
  84
  85         MPD::Song::NowPlayingNotify = 0;
  86
  87         if (!s.Data->artist || !s.Data->title)
  88         {
  89                 Log(llInfo, "Playing song with missing tags detected.");
  90         }
  91         else if (s.Data->time <= 0)
  92         {
  93                 Log(llInfo, "Playing song with unknown length detected.");
  94         }
  95         else if (s.Data->artist && s.Data->title)
  96         {
  97                 if (!myHandshake.OK())
  98                 {
  99                         MPD::Song::NowPlayingNotify = 1;
 100                         return;
 101                 }
 102
 103                 Log(llVerbose, "Playing song detected: %s - %s", s.Data->artist, s.Data->title);
 104                 Log(llInfo, "Sending now playing notification...");
 105
 106                 std::ostringstream postdata;
 107                 string result, postdata_str;
 108                 CURLcode code;
 109
 110                 char *c_artist = curl_easy_escape(0, s.Data->artist, 0);
 111                 char *c_title = curl_easy_escape(0, s.Data->title, 0);
 112                 char *c_album = s.Data->album ? curl_easy_escape(0, s.Data->album, 0) : NULL;
 113                 char *c_track = s.Data->track ? curl_easy_escape(0, s.Data->track, 0) : NULL;
 114                 char *c_mb_trackid = s.Data->musicbrainz_trackid ? curl_easy_escape(0, s.Data->musicbrainz_trackid, 0) : NULL;
 115
 116                 postdata
 117                 << "s=" << myHandshake.SessionID
 118                 << "&a=" << c_artist
 119                 << "&t=" << c_title
 120                 << "&b=";
 121                 if (c_album)
 122                         postdata << c_album;
 123                 postdata << "&l=" << s.Data->time
 124                 << "&n=";
 125                 if (c_track)
 126                         postdata << c_track;
 127                 postdata << "&m=";
 128                 if (c_mb_trackid)
 129                         postdata << c_mb_trackid;
 130
 131                 curl_free(c_artist);
 132                 curl_free(c_title);
 133                 curl_free(c_album);
 134                 curl_free(c_track);
 135                 curl_free(c_mb_trackid);
 136
 137                 postdata_str = postdata.str();
 138
 139                 Log(llVerbose, "URL: %s", myHandshake.NowPlayingURL.c_str());
 140                 Log(llVerbose, "Post data: %s", postdata_str.c_str());
 141
 142                 CURL *np_notification = curl_easy_init();
 143                 curl_easy_setopt(np_notification, CURLOPT_URL, myHandshake.NowPlayingURL.c_str());
 144                 curl_easy_setopt(np_notification, CURLOPT_POST, 1);
 145                 curl_easy_setopt(np_notification, CURLOPT_POSTFIELDS, postdata_str.c_str());
 146                 curl_easy_setopt(np_notification, CURLOPT_WRITEFUNCTION, write_data);
 147                 curl_easy_setopt(np_notification, CURLOPT_WRITEDATA, &result);
 148                 curl_easy_setopt(np_notification, CURLOPT_CONNECTTIMEOUT, curl_connecttimeout);
 149                 curl_easy_setopt(np_notification, CURLOPT_TIMEOUT, curl_timeout);
 150                 curl_easy_setopt(np_notification, CURLOPT_DNS_CACHE_TIMEOUT, 0);
 151                 curl_easy_setopt(np_notification, CURLOPT_NOPROGRESS, 1);
 152                 curl_easy_setopt(np_notification, CURLOPT_NOSIGNAL, 1);
 153                 code = curl_easy_perform(np_notification);
 154                 curl_easy_cleanup(np_notification);
 155
 156                 IgnoreNewlines(result);
 157
 158                 if (result == "OK")
 159                 {
 160                         Log(llInfo, "Notification about currently playing song sent.");
 161                 }
 162                 else
 163                 {
 164                         if (result.empty())
 165                         {
 166                                 Log(llInfo, "Error while sending notification: %s", curl_easy_strerror(code));
 167                         }
 168                         else
 169                         {
 170                                 Log(llInfo, "Audioscrobbler returned status %s", result.c_str());
 171                                 // it can return only OK or BADSESSION, so if we are here, BADSESSION was returned.
 172                                 myHandshake.Clear();
 173                                 Log(llVerbose, "Handshake reset");
 174                                 MPD::Song::NowPlayingNotify = 1;
 175                         }
 176                 }
 177         }
 178 }
 179