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 async Task <IActionResult> Create([FromBody] PrivateSongBM privateSongModel)
{
//automatically validate all input with model binding
if (!ModelState.IsValid)
{
return(BadRequest());
}
//get authenticated user
MyUser user = _context.Users.FirstOrDefault(x => x.UserName == HttpContext.User.Identity.Name);
if (user == null)
{
return(NotFound());
}
_context.Entry(user).Reference(x => x.PrivateSongPlaylist).Load();
// Create private song object:
PrivateSong pvs = new PrivateSong();
pvs.PrivateSongId = Guid.NewGuid();
pvs.MyUser = user;
pvs.ArtistName = privateSongModel.ArtistName;
pvs.AlbumName = privateSongModel.AlbumName;
pvs.Name = privateSongModel.Name;
Video v = new Video();
v.VideoId = Guid.NewGuid();
v.VideoUrl = privateSongModel.VideoUrl;
v.IsLive = false; //not implemented yet, default to false
v.StartSec = Video.GetTimeInSeconds(privateSongModel.StartAt);
v.EndSec = Video.GetTimeInSeconds(privateSongModel.EndAt);
v.Duration = Video.GetDuration(v.StartSec, v.EndSec);
if (v.Duration == null)
{
return(BadRequest()); //invalid video duration
}
Song song = new Song();
song.SongId = Guid.NewGuid();
song.PrivateSong = pvs;
song.PrivateSongId = pvs.PrivateSongId;
v.Song = song;
song.Video = v;
//Add private song to private song's playlist:
Playable p = _context.Playables.FirstOrDefault(y => y.PlaylistId == user.PrivateSongPlaylist.PlaylistId);
PlayableSong ps = new PlayableSong();
ps.PlayableId = p.PlayableId;
ps.Playable = p;
ps.SongId = song.SongId;
ps.Song = song;
ps.Position = _context.Entry(p).Collection(x => x.PlayableSongs).Query().Count();
//Add to data context and save:
_context.Songs.Add(song);
_context.Videos.Add(v);
_context.PrivateSongs.Add(pvs);
_context.PlayableSongs.Add(ps);
await _context.SaveChangesAsync();
PrivateSongBasicVM privateSongVM = new PrivateSongBasicVM(pvs);
return(Ok(privateSongVM));
}
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));
}
