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         static bool NowPlayingNotify = 0;
  45
  46         if (changed.State)
  47         {
  48                 old_state = current_state;
  49                 current_state = Mpd->GetState();
  50                 if (old_state == MPD::psStop && current_state == MPD::psPlay)
  51                         changed.SongID = 1;
  52         }
  53         if (changed.ElapsedTime)
  54         {
  55                 static int crossfade;
  56                 if (Mpd->GetElapsedTime() == ((crossfade = Mpd->GetCrossfade()) ? crossfade : 0 ))
  57                         changed.SongID = 1;
  58                 s.Playback++;
  59         }
  60         if (changed.SongID || (old_state == MPD::psPlay && current_state == MPD::psStop))
  61         {
  62                 s.Submit();
  63
  64                 // in this case allow entering only once
  65                 if (old_state == MPD::psPlay && current_state == MPD::psStop)
  66                         old_state = MPD::psUnknown;
  67
  68                 if (Mpd->GetElapsedTime() < Mpd->GetCrossfade()+10)
  69                         time(&s.StartTime);
  70
  71                 if (current_state == MPD::psPlay || current_state == MPD::psPause)
  72                 {
  73                         s.SetData(Mpd->CurrentSong());
  74                         NowPlayingNotify = s.Data && !s.isStream();
  75                 }
  76         }
  77         if (!NowPlayingNotify || !s.Data || myHandshake.Status != "OK" || myHandshake.NowPlayingURL.empty())
  78                 return;
  79
  80         NowPlayingNotify = 0;
  81
  82         if (!s.Data->artist || !s.Data->title)
  83         {
  84                 Log(llInfo, "Playing song with missing tags detected.");
  85         }
  86         else if (s.Data->time <= 0)
  87         {
  88                 Log(llInfo, "Playing song with unknown length detected.");
  89         }
  90         else if (s.Data->artist && s.Data->title)
  91         {
  92                 Log(llVerbose, "Playing song detected: %s - %s", s.Data->artist, s.Data->title);
  93                 Log(llInfo, "Sending now playing notification...");
  94
  95                 std::ostringstream postdata;
  96                 string result, postdata_str;
  97                 CURLcode code;
  98
  99                 char *c_artist = curl_easy_escape(0, s.Data->artist, 0);
 100                 char *c_title = curl_easy_escape(0, s.Data->title, 0);
 101                 char *c_album = s.Data->album ? curl_easy_escape(0, s.Data->album, 0) : NULL;
 102                 char *c_track = s.Data->track ? curl_easy_escape(0, s.Data->track, 0) : NULL;
 103                 char *c_mb_trackid = s.Data->musicbrainz_trackid ? curl_easy_escape(0, s.Data->musicbrainz_trackid, 0) : NULL;
 104
 105                 postdata
 106                 << "s=" << myHandshake.SessionID
 107                 << "&a=" << c_artist
 108                 << "&t=" << c_title
 109                 << "&b=";
 110                 if (c_album)
 111                         postdata << c_album;
 112                 postdata << "&l=" << s.Data->time
 113                 << "&n=";
 114                 if (c_track)
 115                         postdata << c_track;
 116                 postdata << "&m=";
 117                 if (c_mb_trackid)
 118                         postdata << c_mb_trackid;
 119
 120                 curl_free(c_artist);
 121                 curl_free(c_title);
 122                 curl_free(c_album);
 123                 curl_free(c_track);
 124                 curl_free(c_mb_trackid);
 125
 126                 postdata_str = postdata.str();
 127
 128                 Log(llVerbose, "URL: %s", myHandshake.NowPlayingURL.c_str());
 129                 Log(llVerbose, "Post data: %s", postdata_str.c_str());
 130
 131                 CURL *np_notification = curl_easy_init();
 132                 curl_easy_setopt(np_notification, CURLOPT_URL, myHandshake.NowPlayingURL.c_str());
 133                 curl_easy_setopt(np_notification, CURLOPT_POST, 1);
 134                 curl_easy_setopt(np_notification, CURLOPT_POSTFIELDS, postdata_str.c_str());
 135                 curl_easy_setopt(np_notification, CURLOPT_WRITEFUNCTION, write_data);
 136                 curl_easy_setopt(np_notification, CURLOPT_WRITEDATA, &result);
 137                 curl_easy_setopt(np_notification, CURLOPT_CONNECTTIMEOUT, curl_timeout);
 138                 code = curl_easy_perform(np_notification);
 139                 curl_easy_cleanup(np_notification);
 140
 141                 IgnoreNewlines(result);
 142
 143                 if (result == "OK")
 144                 {
 145                         Log(llInfo, "Notification about currently playing song sent.");
 146                 }
 147                 else
 148                 {
 149                         if (result.empty())
 150                         {
 151                                 Log(llInfo, "Error while sending notification: %s", curl_easy_strerror(code));
 152                         }
 153                         else
 154                         {
 155                                 Log(llInfo, "Audioscrobbler returned status %s", result.c_str());
 156                                 myHandshake.Clear(); // handshake probably failed if we are here, so reset it
 157                                 Log(llVerbose, "Handshake reset");
 158                                 NowPlayingNotify = 1;
 159                         }
 160                 }
 161         }
 162 }
 163