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/*!
* \file mg_playlist.c
* \brief defines functions to be executed on playlists for the vdr muggle plugindatabase
*
* \version $Revision: 1.6 $
* \date $Date: 2004/07/27 20:50:54 $
* \author Ralf Klueber, Lars von Wedel, Andreas Kellner
* \author Responsible author: $Author: lvw $
*
* This file implements the class mgPlaylist which maintains a playlist
* and supports editing (e.g. adding or moving tracks), navigating it
* (e.g. obtaining arbitrary items or accessing them sequentially) or
* making it persistent in some database.
*/
#include "mg_playlist.h"
#include "mg_tools.h"
#include <vector>
using namespace std;
/* ==== constructors ==== */
mgPlaylist::mgPlaylist()
{
m_current_idx = -1;
char *buffer;
asprintf( &buffer, "Playlist-%ld", random() );
m_listname = buffer;
}
mgPlaylist::mgPlaylist(string listname)
{
m_current_idx = -1;
m_listname = listname;
}
/* ==== destructor ==== */
mgPlaylist::~mgPlaylist()
{
}
void mgPlaylist::toggleShuffle()
{
}
void mgPlaylist::toggleLoop()
{
}
void mgPlaylist::initialize()
{
m_current_idx = 0;
}
/* ==== add/remove tracks ==== */
/* adds a song at the end of the playlist */
void mgPlaylist::append(mgContentItem* item)
{
m_list.push_back(item);
}
/* append a list of tracks at the end of the playlist */
void mgPlaylist::appendList( vector<mgContentItem*> *tracks )
{
vector<mgContentItem*>::iterator iter;
mgDebug( 3, "Adding %d tracks to the playlist", tracks->size() );
for( iter = tracks->begin(); iter != tracks->end(); iter++ )
{
m_list.push_back(*iter);
}
// TODO: why is this vector cleared? shouldn't the caller take care of this? LVW
tracks->clear();
}
/* add a song after 'position' */
void mgPlaylist::insert( mgContentItem* item, unsigned int position )
{
if( position >= m_list.size() )
{
m_list.push_back(item);
}
else
{
m_list.insert( m_list.begin() + position, item );
}
}
void mgPlaylist::clear()
{
// TODO: who takes care of memory allocation/deallocation of mgItems?
vector<mgContentItem*>::iterator iter;
for( iter = m_list.begin(); iter != m_list.end(); iter++ )
{ // delete each item in the list
delete *iter;
}
// finally clear the list itself
m_list.clear();
}
void mgPlaylist::move( int from, int to )
{
vector<mgContentItem*>::iterator from_iter = m_list.begin() + from;
vector<mgContentItem*>::iterator to_iter = m_list.begin() + to;
m_list.insert( to_iter, *from_iter);
m_list.erase( from_iter );
}
/*==== access tracks ====*/
string mgPlaylist::getListname()
{
return m_listname;
}
void mgPlaylist::setListname(string name)
{
m_listname = name;
}
// returns the count of items in the list
int mgPlaylist::count()
{
return m_list.size();
}
// returns the first item of the list
mgContentItem* mgPlaylist::getCurrent()
{
return *( m_list.begin() + m_current_idx );
}
// returns the nth track from the playlist
void mgPlaylist::gotoPosition(unsigned int position)
{
if( position >= m_list.size() )
{
// TODO: why not return a NULL pointer? LVW
m_current_idx = -1;
}
else
{
m_current_idx = position;
}
}
// proceeds to the next item
void mgPlaylist::skipFwd()
{
if( m_current_idx + 1 < m_list.size() ) // unless loop mode
{
m_current_idx ++;
}
else
{
// or goto 1 in case of loop mode
m_current_idx = -1;
}
}
// goes back to the previous item
void mgPlaylist::skipBack()
{
if( m_current_idx > 0 )
{
m_current_idx --;
}
else
{
// or goto last in case of loop mode
m_current_idx = -1;
}
}
// get next track, do not update data structures
mgContentItem* mgPlaylist::sneakNext()
{
if( m_current_idx + 1 <= m_list.size() ) // unless loop mode
{
return *(m_list.begin() + m_current_idx + 1);
}
else
{
return &(mgContentItem::UNDEFINED);
}
}
bool mgPlaylist::exportM3U( string m3u_file )
{
vector<mgContentItem*>::iterator iter;
bool result = true;
// open a file for writing
FILE *listfile = fopen( m3u_file.c_str(), "w" );
if( !listfile )
{
return false;
}
fprintf( listfile, "#EXTM3U" );
for( iter = m_list.begin(); iter != m_list.end(); iter++ )
{ // each item in the list
fprintf( listfile, "#EXTINF:0,%s\n", (*iter)->getLabel().c_str() );
fprintf( listfile, "%s", (*iter)->getSourceFile().c_str() );
}
fclose( listfile );
return result;
}
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