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database.js
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database.js
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var mysql = require('mysql');
// Loading configuration file with database credentials
var config = require('./config');
var connection = mysql.createConnection({
host : config.db.host,
user : config.db.user,
password : config.db.password,
database : config.db.database
});
exports.insertSong = function(path, metadata) {
var title = metadata.title
artist = metadata.artist
album = metadata.album
genre = metadata.genre[0]
;
checkGenre(path, metadata);
}
var newlyRegisteredGenre = [];
function checkGenre(path, metadata) {
var genre = metadata.genre[0];
connection.query('SELECT * FROM genres WHERE name = "' + genre + '"', function(err, rows, fields) {
if (err) throw err;
var nbMatch = rows.length;
if (nbMatch == 0) {
// Checking if the genre was already told to be inserted by Mysql
if (newlyRegisteredGenre.indexOf(genre) == -1 ) {
newlyRegisteredGenre.push(genre);
var insertStatement = {id : '', name: genre};
connection.query("INSERT INTO genres SET ?", insertStatement, function(err, rows, fields) {
if (err) {
console.log("Error while inserting genre for song : " + metadata.title + ", path : " + metadata.path +", album : " + metadata.album +", artist : " + metadata.artist + ", genre: " + metadata.genre);
throw err;
}
metadata['genre_id'] = rows['insertId'];
checkArtist(path, metadata);
});
}
}
else {
metadata['genre_id'] = rows[0]['id'];
checkArtist(path, metadata);
}
});
}
var newlyRegisteredArtist = [];
function checkArtist(path, metadata) {
var artist = metadata.artist;
connection.query('SELECT * FROM artists WHERE name = "' + artist + '"', function(err, rows, fields) {
if (err) throw err;
var nbMatch = rows.length;
if (nbMatch == 0) {
/*
* TO DO : Fix pour éviter d'insérer plusieurs fois le même artiste
*/
if (newlyRegisteredArtist.indexOf(artist) == -1 ) {
newlyRegisteredArtist.push(artist);
var insertStatement = {id : '', name: artist};
connection.query("INSERT INTO artists SET ?", insertStatement, function(err, rows, fields) {
if (err) {
console.log("Error while inserting artist for song : " + metadata.title + ", path : " + metadata.path +", album : " + metadata.album +", artist : " + metadata.artist + ", genre: " + metadata.genre);
throw err;
}
metadata['artist_id'] = rows['insertId'];
checkAlbum(path, metadata);
});
}
}
else {
metadata['artist_id'] = rows[0]['id'];
checkAlbum(path, metadata);
}
});
}
var newlyRegisteredAlbum = [];
function checkAlbum(path, metadata) {
var album = metadata.album;
connection.query('SELECT * FROM albums WHERE name = "' + album + '"', function(err, rows, fields) {
if (err) throw err;
nbMatch = rows.length;
if (nbMatch == 0) {
if (newlyRegisteredAlbum.indexOf(album) == -1 ) {
newlyRegisteredAlbum.push(album);
var insertStatement = {id : '', name: album};
connection.query("INSERT INTO albums SET ?", insertStatement, function(err, rows, fields) {
if (err) {
console.log("Error while inserting album for song : " + metadata.title + ", path : " + metadata.path +", album : " + metadata.album +", artist : " + metadata.artist + ", genre: " + metadata.genre);
throw err;
}
metadata['album_id'] = rows['insertId'];
checkSong(path, metadata);
});
}
}
else {
metadata['album_id'] = rows[0]['id'];
checkSong(path, metadata);
}
});
}
function checkSong(path, metadata) {
var genre = metadata.genre[0];
var genre_id = metadata.genre_id;
var artist = metadata.artist;
var artist_id = metadata.artist_id;
var album = metadata.album;
var album_id = metadata.album_id;
var title = metadata.title ;
connection.query('SELECT * FROM songs WHERE path = "' + path + '"', function(err, rows, fields) {
if (err) throw err;
// Inserting if match
nbMatch = rows.length;
if (nbMatch == 0) {
var song = {id : '', name: title, path: path, id_albums: album_id, id_artists : artist_id};
connection.query("INSERT INTO songs SET ?", song, function(err, rows, fields) {
if (err) {
console.log("Error while inserting song : " + metadata.title + ", path : " + metadata.path +", album : " + metadata.album +", artist : " + metadata.artist + ", genre: " + metadata.genre);
throw err;
}
metadata['song_id'] = rows['insertId'];
console.log(metadata['song_id']);
genreAssociation(metadata);
});
}
});
}
function genreAssociation(metadata) {
genre_id = metadata.genre_id;
song_id = metadata.song_id;
var genreRelation = {id : genre_id, id_songs: song_id};
connection.query("INSERT INTO genreAssociation SET ?", genreRelation, function(err, rows, fields) {
if (err) {
console.log("Error while associating genre to the song : " + metadata.title + ", path : " + metadata.path +", album : " + metadata.album +", artist : " + metadata.artist + ", genre: " + metadata.genre);
throw err;
}
else
console.log("Song successfully inserted for : " + metadata.title + ", path : " + metadata.path +", album : " + metadata.album +", artist : " + metadata.artist + ", genre: " + metadata.genre);
});
}
/*
// Adding an artist
var artist = {id : '', name: 'Pink Martini'};
connection.query("INSERT INTO artists SET ?", artist, function(err, rows, fields) {
if (err) throw err;
console.log('The insert result is: ', rows);
});
// Adding a genre
var genre = {id : '', name: 'Jazz'};
connection.query("INSERT INTO genres SET ?", genre, function(err, rows, fields) {
if (err) throw err;
console.log('The insert result is: ', rows);
});
// Adding an album
var album = {id : '', name: 'Sympathique'};
connection.query("INSERT INTO albums SET ?", album, function(err, rows, fields) {
if (err) throw err;
console.log('The insert result is: ', rows);
});
// Adding a song
var song = {id : '', name: 'Amado Mio', path: 'Pink Martini/Sympathique/Amado Mio.mp3', id_albums: 2, id_artists : 6};
connection.query("INSERT INTO songs SET ?", song, function(err, rows, fields) {
if (err) throw err;
console.log('The insert result is: ', rows);
});
// Adding genre relation
var genreRelation = {id : 3, id_songs: 1};
connection.query("INSERT INTO genreAssociation SET ?", genreRelation, function(err, rows, fields) {
if (err) throw err;
console.log('The insert result is: ', rows);
});
// SELECT statement
connection.query("SELECT * FROM songs", function(err, rows, fields) {
if (err) throw err;
console.log('The result is: ', rows);
});
*/