public async Task <IActionResult> Create([FromBody] PlaylistNameBM playlistNameModel)
{
//validate the name of the playlist
if (!ModelState.IsValid)
{
return(BadRequest());
}
MyUser user = _helper.GetAuthUser(this.HttpContext, true);
if (user == null)
{
return(Unauthorized());
}
//TODO : there must be a limit for the number of playlists that an user may have.
//Temporary hack:
if (user.Playlists.Count() == 20)
{
return(BadRequest("Too many playlists."));
}
//create new playlist, add it to user's playlists, save context async:
Playlist playlist = new Playlist(playlistNameModel.playlistName, user);
user.Playlists.Add(playlist);
await _context.SaveChangesAsync();
PlaylistBasicVM playlistVM = new PlaylistBasicVM(playlist);
return(Ok(playlistVM));
}
public async Task <IActionResult> Remove(string playlistIdString, string songIdString)
{
//Validate string id as a valid GUID id:
if (!Guid.TryParse(songIdString, out Guid songId))
{
return(NotFound());
}
//Find the playlist:
Playlist playlist = _helper.GetUserPlaylistById(this.HttpContext, playlistIdString);
if (playlist == null)
{
return(NotFound());
}
//Get PlayableSong, if it exists:
_context.Entry(playlist).Reference(x => x.Playable).Load();
_context.Entry(playlist.Playable).Collection(x => x.PlayableSongs).Load();
PlayableSong playableSong = playlist.PlayableSongs.FirstOrDefault(x => x.SongId == songId);
if (playableSong == null)
{
return(NotFound());
}
//Update positions, every song that comes after the
//removed position should go back a position:
int removedPosition = playableSong.Position;
foreach (PlayableSong z in playlist.PlayableSongs)
{
if (z.Position > removedPosition)
{
z.Position--;
}
}
//Remove song, save changes:
playlist.PlayableSongs.Remove(playableSong);
await _context.SaveChangesAsync();
PlaylistBasicVM playlistVM = new PlaylistBasicVM {
PlaylistId = playlist.PlaylistId
};
return(Ok(playlistVM));
}
public IActionResult GetPrivateSongsPlaylist()
{
MyUser user = _helper.GetAuthUser(this.HttpContext, true);
if (user == null)
{
return(Unauthorized());
}
//load relevant info from context:
_context.Entry(user).Reference(x => x.PrivateSongPlaylist).Load();
_context.Entry(user.PrivateSongPlaylist).Reference(x => x.Playlist).Load();
PlaylistBasicVM playlist = new PlaylistBasicVM(user.PrivateSongPlaylist.Playlist);
return(Ok(playlist));
}
public async Task <IActionResult> Delete(string playlistIdString)
{
Playlist playlist = _helper.GetUserPlaylistById(this.HttpContext, playlistIdString);
if (playlist == null)
{
return(NotFound());
}
//remove playlist, save context:
_context.Playlists.Remove(playlist);
await _context.SaveChangesAsync();
//return playlistBasicVM with null name,
//to inform client that the playlist was deleted
PlaylistBasicVM playlistVM = new PlaylistBasicVM();
playlistVM.PlaylistId = playlist.PlaylistId;
return(Ok(playlistVM));
}
public async Task <IActionResult> Edit([FromBody] PlaylistNameBM newName, string playlistIdString)
{
if (!ModelState.IsValid)
{
return(BadRequest());
}
Playlist playlist = _helper.GetUserPlaylistById(this.HttpContext, playlistIdString);
if (playlist == null)
{
return(NotFound());
}
//change playlist's name, save context:
playlist.Name = newName.playlistName;
await _context.SaveChangesAsync();
PlaylistBasicVM playlistVM = new PlaylistBasicVM(playlist);
return(Ok(playlistVM));
}
public async Task <IActionResult> CreateMultiple([FromBody] string[] songIdsStrings, string playlistIdString)
{
//validate the array of songIds:
if (songIdsStrings == null || songIdsStrings.Length == 0 || songIdsStrings.Length >= 50)
{
return(NotFound());
}
//validate songIds as valid GUID ids:
Guid[] songIds = new Guid[songIdsStrings.Length];
for (int i = 0; i < songIds.Length; i++)
{
if (!Guid.TryParse(songIdsStrings[i], out songIds[i]))
{
return(NotFound());
}
}
//If any of the song ids doesn't exist, return 'NotFound':
List <Song> songs = new List <Song>();
foreach (Guid id in songIds)
{
Song s = _context.Songs.FirstOrDefault(x => x.SongId == id);
if (s == null)
{
return(NotFound());
}
else
{
songs.Add(s);
}
}
//Find the playlist to which songs should be added:
Playlist playlist = _helper.GetUserPlaylistById(this.HttpContext, playlistIdString);
if (playlist == null)
{
return(NotFound());
}
_context.Entry(playlist).Reference(x => x.Playable).Load();
_context.Entry(playlist.Playable).Collection(x => x.PlayableSongs).Load();
//Add songs by creating the corresponding PlayableSong objects:
foreach (Song s in songs)
{
//check if the song already exists in playlist, if so, skip
if (!playlist.PlayableSongs.Any(x => x.SongId == s.SongId))
{
PlayableSong ps = new PlayableSong();
ps.PlayableId = playlist.Playable.PlayableId;
ps.Playable = playlist.Playable;
ps.SongId = s.SongId;
ps.Song = s;
ps.Position = playlist.PlayableSongs.Count(); //add at the end of playlist!
playlist.PlayableSongs.Add(ps);
}
}
await _context.SaveChangesAsync();
PlaylistBasicVM playlistVM = new PlaylistBasicVM {
PlaylistId = playlist.PlaylistId
};
return(Ok(playlistVM));
}
public async Task <IActionResult> EditPosition(string playlistIdString, [FromBody] PlayableSongBM playableSongModel)
{
//Find the playlist:
Playlist playlist = _helper.GetUserPlaylistById(this.HttpContext, playlistIdString);
if (playlist == null)
{
return(NotFound());
}
_context.Entry(playlist).Reference(x => x.Playable).Load();
_context.Entry(playlist.Playable).Collection(x => x.PlayableSongs).Load();
//Validate string id as a valid GUID id:
if (!Guid.TryParse(playableSongModel.SongId, out Guid songId))
{
return(NotFound());
}
//Find the PlayableSong:
PlayableSong playableSong = playlist.PlayableSongs.FirstOrDefault(x => x.SongId == songId);
if (playableSong == null)
{
return(NotFound());
}
//Validate the new position:
int wantedPosition = playableSongModel.Position;
if (wantedPosition < 0 || wantedPosition >= playlist.PlayableSongs.Count)
{
return(NotFound());
}
//Update positions of other songs in playlist:
int currentPosition = playableSong.Position;
if (wantedPosition < currentPosition)
{
foreach (PlayableSong z in playlist.PlayableSongs) //moves songs down
{
if (z.Position >= wantedPosition && z.Position < currentPosition)
{
z.Position++;
}
}
}
else if (wantedPosition > currentPosition)
{
foreach (PlayableSong z in playlist.PlayableSongs) //move songs up
{
if (z.Position <= wantedPosition && z.Position > currentPosition)
{
z.Position--;
}
}
}
//Edit song position and save:
playableSong.Position = wantedPosition;
await _context.SaveChangesAsync();
PlaylistBasicVM playlistVM = new PlaylistBasicVM {
PlaylistId = playlist.PlaylistId
};
return(Ok(playlistVM));
}
