//function to add song to DB or XML, depending on where album is present. Calls AddSongInXML if album is not present in DB
public bool AddSong(Song song, out string errMsg)
{
//Flag to check if album is presen in DB.
bool isAlbumExist = false;
errMsg = string.Empty;
try
{
using (var dbConn = _dbConnectionFactory.OpenDbConnection())
{
using (var trans = dbConn.BeginTransaction(System.Data.IsolationLevel.ReadUncommitted))
{
if (dbConn.Select<Album>(x => x.Id == song.AlbumId).Count() > 0)
{
//Marked as true as album is present
isAlbumExist = true;
song.DateModified = DateTime.Now;
song.DateAdded = DateTime.Now;
dbConn.Insert<Song>(song);
trans.Commit();
}
}
}
if (!isAlbumExist)
{
//Add song to XML as album is not present in DB.
errMsg = AddSongInXML(song) == false ? "No album exist" : string.Empty;
}
return true;
}
catch (Exception ex)
{
_logger.Error("AlbumRepository.cs - GetAlbumSongs", ex);
throw ex;
}
}
public bool AddSongInXML(Song songToAdd)
{
try
{
string appdatafolder = HttpContext.Current.Server.MapPath("~/App_Data/Songs.xml");
XmlDocument doc = new XmlDocument();
doc.Load(appdatafolder);
XmlNode album = doc.SelectSingleNode("music/artist/album [Id='" + songToAdd.AlbumId + "']");
if (album != null)
{
XmlElement song = doc.CreateElement("song");
song.SetAttribute("title", songToAdd.Title);
song.SetAttribute("length", songToAdd.Length + ":" + (songToAdd.Length - (int)songToAdd.Length) * 60);
XmlNode lastSong = album.LastChild;
song.SetAttribute("SongId", (Convert.ToInt32(lastSong.Attributes["SongId"]) + 1).ToString());
lock (this)
{
doc.Save(appdatafolder);
}
return true;
}
else
{
return false;
}
}
catch (Exception ex)
{
_logger.Error("AlbumRepository.cs - GetAlbumSongs", ex);
throw ex;
}
}
//Gets album and song info from XML. This will be called from GetAlbumSongs
public Album GetAlbumSongsFromXML(string albumName, ref List<Song> songs)
{
Album album = null;
string appdatafolder = HttpContext.Current.Server.MapPath("~/App_Data/Songs.xml");
XmlReader xmlReader = XmlReader.Create(appdatafolder);
string artist = string.Empty;
while (xmlReader.Read())
{
if (xmlReader.MoveToContent() == XmlNodeType.Element &&
xmlReader.Name == "artist")
{
artist = xmlReader.GetAttribute("name");
}
if (xmlReader.MoveToContent() == XmlNodeType.Element &&
xmlReader.Name == "album" &&
String.Equals(albumName, xmlReader.GetAttribute("title"), StringComparison.InvariantCultureIgnoreCase))
{
album = new Album()
{
Id = Convert.ToInt32(xmlReader.GetAttribute("Id")),
Title = xmlReader.GetAttribute("title"),
ArtistName = artist
};
if (xmlReader.ReadToDescendant("song"))
{
do
{
Song s = new Song()
{
AlbumId = album.Id.Value,
Id = Convert.ToInt32(xmlReader.GetAttribute("SongId")),
Title = xmlReader.GetAttribute("title"),
Length = Convert.ToDouble(xmlReader.GetAttribute("length").Split(':')[0]) + (Convert.ToDouble(xmlReader.GetAttribute("length").Split(':')[1]) / 60)
};
songs.Add(s);
} while (xmlReader.ReadToNextSibling("song"));
}
}
}
return album;
}
