public Task <IPagedCollection <PlaylistDetail> > Handle(GetPlaylistListQuery request, CancellationToken cancellationToken)
{
if (request is null)
{
throw new ArgumentNullException(nameof(request));
}
return(GetPlaylistsList(request));
}
private async Task <IPagedCollection <PlaylistDetail> > GetPlaylistsList(GetPlaylistListQuery request)
{
var filter = _filterBuilder
.WhereTrackIdEquals(request.TrackId)
.WhereNameLike(request.Name).Filter;
var playlistsFromDb = await _context
.Playlists
.TagWithQueryName(nameof(GetPlaylistsList))
.Where(filter)
.Include(e => e.PlaylistTracks)
.OrderBy(request.Order, _orderBuilder)
.ToPagedCollectionAsync(request.PageNumber, request.PageSize);
var playlists = _mapper.Map <IReadOnlyList <PlaylistDetail> >(playlistsFromDb);
return(new PagedCollection <PlaylistDetail>(
playlists,
playlistsFromDb.ItemCount,
playlistsFromDb.CurrentPageNumber,
playlistsFromDb.PageSize));
}