// PUT api/Songs/5
public HttpResponseMessage PutSong(int id, Song song)
{
if (!ModelState.IsValid)
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
var songToUpdate = db.Songs.FirstOrDefault(s => s.SongId == id);
if (songToUpdate != null && song != null)
{
songToUpdate.UpdateWith(song);
}
else
{
return Request.CreateResponse(HttpStatusCode.BadRequest);
}
db.Entry(songToUpdate).State = EntityState.Modified;
try
{
db.SaveChanges();
}
catch (DbUpdateConcurrencyException ex)
{
return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
}
return Request.CreateResponse(HttpStatusCode.OK);
}
public void UpdateWith(Song song)
{
if (!string.IsNullOrWhiteSpace(song.SongTitle))
{
this.SongTitle = song.SongTitle;
}
if (song.SongYear.HasValue)
{
this.SongYear = song.SongYear;
}
if (!string.IsNullOrWhiteSpace(song.Genre))
{
this.Genre = song.Genre;
}
}
// POST api/Songs
public HttpResponseMessage PostSong(string artistName, string albumTitle, [FromBody]SongDto song)
{
if (string.IsNullOrWhiteSpace(artistName) ||
string.IsNullOrWhiteSpace(albumTitle))
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
var artist = db.Artists.Include(a => a.Albums).SingleOrDefault(a => a.ArtistName == artistName);
if (artist == null)
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
var album = artist.Albums.SingleOrDefault(a => a.AlbumTitle == albumTitle);
if (album == null)
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
if (album.Songs.Any(s => s.SongTitle == song.SongTitle))
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
if (ModelState.IsValid)
{
var newSong = new Song
{
SongTitle = song.SongTitle,
SongYear = song.SongYear,
Genre = song.Genre,
Artist = artist,
Album = album
};
db.Songs.Add(newSong);
db.SaveChanges();
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, newSong);
response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = newSong.SongId }));
return response;
}
else
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
}
