src/mpdpp.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 "mpdpp.h"
  22
  23 using std::string;
  24
  25 MPD::Connection::Connection() : isConnected(0),
  26                                  itsErrorCode(0),
  27                                  itsHost("localhost"),
  28                                  itsPort(6600),
  29                                  itsTimeout(15),
  30                                  itsUpdater(0),
  31                                  itsErrorHandler(0)
  32 {
  33         itsConnection = 0;
  34         itsCurrentStatus = 0;
  35         itsOldStatus = 0;
  36 }
  37
  38 MPD::Connection::~Connection()
  39 {
  40         if (itsConnection)
  41                 mpd_closeConnection(itsConnection);
  42         if (itsOldStatus)
  43                 mpd_freeStatus(itsOldStatus);
  44         if (itsCurrentStatus)
  45                 mpd_freeStatus(itsCurrentStatus);
  46 }
  47
  48 bool MPD::Connection::Connect()
  49 {
  50         if (!isConnected && !itsConnection)
  51         {
  52                 itsConnection = mpd_newConnection(itsHost.c_str(), itsPort, itsTimeout);
  53                 isConnected = 1;
  54                 if (CheckForErrors())
  55                         return false;
  56                 if (!itsPassword.empty())
  57                         SendPassword();
  58                 return !CheckForErrors();
  59         }
  60         else
  61                 return true;
  62 }
  63
  64 bool MPD::Connection::Connected() const
  65 {
  66         return isConnected;
  67 }
  68
  69 void MPD::Connection::Disconnect()
  70 {
  71         if (itsConnection)
  72                 mpd_closeConnection(itsConnection);
  73         if (itsOldStatus)
  74                 mpd_freeStatus(itsOldStatus);
  75         if (itsCurrentStatus)
  76                 mpd_freeStatus(itsCurrentStatus);
  77         itsConnection = 0;
  78         itsCurrentStatus = 0;
  79         itsOldStatus = 0;
  80         isConnected = 0;
  81 }
  82
  83 void MPD::Connection::SetHostname(const string &host)
  84 {
  85         size_t at = host.find("@");
  86         if (at != string::npos)
  87         {
  88                 itsPassword = host.substr(0, at);
  89                 itsHost = host.substr(at+1);
  90         }
  91         else
  92                 itsHost = host;
  93 }
  94
  95 void MPD::Connection::SendPassword() const
  96 {
  97         mpd_sendPasswordCommand(itsConnection, itsPassword.c_str());
  98         mpd_finishCommand(itsConnection);
  99 }
 100
 101 void MPD::Connection::SetStatusUpdater(StatusUpdater updater, void *data)
 102 {
 103         itsUpdater = updater;
 104         itsStatusUpdaterUserdata = data;
 105 }
 106
 107 void MPD::Connection::SetErrorHandler(ErrorHandler handler, void *data)
 108 {
 109         itsErrorHandler = handler;
 110         itsErrorHandlerUserdata = data;
 111 }
 112
 113 void MPD::Connection::UpdateStatus()
 114 {
 115         if (!itsConnection)
 116                 return;
 117
 118         CheckForErrors();
 119
 120         if (!itsConnection)
 121                 return;
 122
 123         if (itsOldStatus)
 124                 mpd_freeStatus(itsOldStatus);
 125
 126         itsOldStatus = itsCurrentStatus;
 127         itsCurrentStatus = 0;
 128
 129         mpd_sendStatusCommand(itsConnection);
 130         itsCurrentStatus = mpd_getStatus(itsConnection);
 131
 132         if (CheckForErrors())
 133                 return;
 134
 135         if (itsCurrentStatus && itsUpdater)
 136         {
 137                 if (itsOldStatus == NULL)
 138                 {
 139                         itsChanges.Playlist = 1;
 140                         itsChanges.SongID = 1;
 141                         itsChanges.ElapsedTime = 1;
 142                         itsChanges.State = 1;
 143                 }
 144                 else
 145                 {
 146                         itsChanges.Playlist = itsOldStatus->playlist != itsCurrentStatus->playlist;
 147                         itsChanges.SongID = itsOldStatus->songid != itsCurrentStatus->songid;
 148                         itsChanges.ElapsedTime = itsOldStatus->elapsedTime != itsCurrentStatus->elapsedTime;
 149                         itsChanges.State = itsOldStatus->state != itsCurrentStatus->state;
 150                 }
 151                 itsUpdater(this, itsChanges, itsErrorHandlerUserdata);
 152         }
 153 }
 154
 155 mpd_Song * MPD::Connection::CurrentSong() const
 156 {
 157         if (isConnected && (GetState() == psPlay || GetState() == psPause))
 158         {
 159                 mpd_sendCurrentSongCommand(itsConnection);
 160                 mpd_InfoEntity *item = NULL;
 161                 item = mpd_getNextInfoEntity(itsConnection);
 162                 if (item)
 163                 {
 164                         mpd_Song *result = item->info.song;
 165                         item->info.song = 0;
 166                         mpd_freeInfoEntity(item);
 167                         return result;
 168                 }
 169                 mpd_finishCommand(itsConnection);
 170         }
 171         return NULL;
 172 }
 173
 174 int MPD::Connection::CheckForErrors()
 175 {
 176         itsErrorCode = 0;
 177         if (itsConnection->error)
 178         {
 179                 itsErrorMessage = itsConnection->errorStr;
 180                 if (itsConnection->error == MPD_ERROR_ACK)
 181                 {
 182                         if (itsErrorHandler)
 183                                 itsErrorHandler(this, itsConnection->errorCode, itsErrorMessage, itsErrorHandlerUserdata);
 184                         itsErrorCode = itsConnection->errorCode;
 185                 }
 186                 else
 187                 {
 188                         if (itsErrorHandler)
 189                                 itsErrorHandler(this, itsConnection->error, itsErrorMessage, itsErrorHandlerUserdata);
 190                         itsErrorCode = itsConnection->error;
 191                         Disconnect(); // the rest of errors are fatal to connection
 192                 }
 193                 if (itsConnection)
 194                         mpd_clearError(itsConnection);
 195         }
 196         return itsErrorCode;
 197 }