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#include <string>
using namespace std;
#include <stdlib.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <mysql/mysql.h>
#include <taglib/tag.h>
#include <taglib/fileref.h>
#include "mg_tools.h"
MYSQL *db;
char *host, *user, *pass, *dbname;
int init_database()
{
db = mysql_init(NULL);
if( db == NULL )
{
return -1;
}
if( mysql_real_connect( db, host, user, pass,
dbname, 0, NULL, 0 ) == NULL )
{
return -2;
}
return 0;
}
time_t get_fs_modification_time( string filename )
{
struct stat *buf = (struct stat*) malloc( sizeof( struct stat ) );
// yes: obtain modification date for file and db entry
int statres = stat( filename.c_str(), buf );
time_t mod = buf->st_mtime;
free( buf );
return mod;
}
time_t get_db_modification_time( long uid )
{
time_t mt;
MYSQL_RES *result = mgSqlReadQuery( db, "SELECT modification_time FROM tracks WHERE id=\"%d\"", uid );
MYSQL_ROW row = mysql_fetch_row( result );
string mod_time = row[0];
mt = (time_t) atol( mod_time.c_str() );
return mt;
}
long find_file_in_database( string filename )
{
MYSQL_RES *result = mgSqlReadQuery( db, "SELECT id FROM tracks WHERE mp3file=\"%s\"", filename.c_str() );
MYSQL_ROW row = mysql_fetch_row( result );
// obtain ID and return
return atol( row[0] );
}
// read tags from the mp3 file and store them into the corresponding database entry
void update_db( long uid, string filename )
{
// char title[1024], album[1024], year[5], artist[1024], cddbid[20], trackno[5];
TagLib::String title, album, artist, genre, cddbid;
uint trackno, year;
// ID3_Tag filetag( filename.c_str() );
TagLib::FileRef f( filename.c_str() );
if( !f.isNull() && f.tag() )
{
// cout << "Evaluating " << filename << endl;
TagLib::Tag *tag = f.tag();
// obtain tag information
title = tag->title();
album = tag->album();
year = tag->year();
artist = tag->artist();
trackno = tag->track();
genre = tag->genre();
// TODO: CD identifier (?), playcounter, popularimeter?, volume adjustment
// finally update the database
// obtain associated album or create
if( album == "" )
{ // no album found, associate with default album
cddbid = "0000unknown0000";
}
else
{ // album tag found, associate or create
MYSQL_RES *result = mgSqlReadQuery( db, "SELECT cddbid FROM album WHERE title=\"%s\" AND artist=\"%s\"",
album.toCString(), artist.toCString() );
MYSQL_ROW row = mysql_fetch_row( result );
// num rows == 0 ?
int nrows = mysql_num_rows(result);
if( nrows == 0 )
{
// create new album entry
long id = random();
char *buf;
asprintf( &buf, "%d-%s", id, album.toCString() );
cddbid = TagLib::String( buf ).substr( 0, 20 );
free( buf );
mgSqlWriteQuery( db, "INSERT INTO album (artist,title,cddbid) VALUES (\"%s\", \"%s\", \"%s\")", artist.toCString(), album.toCString(), cddbid.toCString() );
}
else
{ // use first album found as source id for the track
cddbid = row[0];
}
}
// update tracks table
if( uid > 0 )
{ // the entry is known to exist already, hence update it
mgSqlWriteQuery( db, "UPDATE tracks SET artist=\"%s\", title=\"%s\", year=\"%s\", sourceid=\"%s\", mp3file=\"%s\""
"WHERE id=%d", artist.toCString(), title.toCString(), year, cddbid.toCString(), filename.c_str(), uid );
}
else
{ // the entry does not exist, create it
// int t = title.find( "'" );
// int a = artist.find( "'" );
mgSqlWriteQuery( db,
"INSERT INTO tracks (artist,title,year,sourceid,tracknb,mp3file)"
" VALUES (\"%s\", \"%s\", %d, \"%s\", %d, \"%s\")",
artist.toCString(), title.toCString(), year, cddbid.toCString(), trackno, filename.c_str() );
/*
cout << "-- TAG --" << endl;
cout << "title - \"" << tag->title() << "\"" << endl;
cout << "artist - \"" << tag->artist() << "\"" << endl;
cout << "album - \"" << tag->album() << "\"" << endl;
cout << "year - \"" << tag->year() << "\"" << endl;
cout << "comment - \"" << tag->comment() << "\"" << endl;
cout << "track - \"" << tag->track() << "\"" << endl;
cout << "genre - \"" << tag->genre() << "\"" << endl;
*/
}
}
}
void update_tags( long uid, string filename )
{
}
void evaluate_file( string filename )
{
if( 0 == init_database() )
{
// is filename stored in database?
long uid = find_file_in_database( filename );
if( uid >= 0 )
{
// currently only update database, do not consider writing changes from the db back
/*
// determine modification times in database and on filesystem
time_t db_time = get_db_modification_time( uid );
time_t fs_time = get_fs_modification_time( filename );
if( db_time > fs_time )
{
// db is newer: update id3 tags from db
update_tags( uid, filename );
}
else
{
// file is newer: update db from id3 tags
update_db( uid, filename );
}
*/
update_db( uid, filename );
}
else
{
// not in db yet: import file
update_db( -1, filename );
}
}
}
int main( int argc, char *argv[] )
{
host = "134.130.124.222";
user = "root";
dbname = "giantdisc";
pass = NULL;
/*
host = "localhost";
user = "vdr";
dbname = "GiantDisc";
pass = NULL;
*/
struct timeval tv;
struct timezone tz;
gettimeofday( &tv, &tz );
srandom( tv.tv_usec );
int res = init_database();
if( !res )
{
update_db( 0, string( argv[1] ) );
}
else
{
printf( "Database initialization failed. Exiting.\n" );
}
return res;
}
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