public PagedList <PlaylistArtist> GetAllPagination(PlaylistArtistResourceParameters resourceParams)
{
var collectionBeforePaging = _context.PlaylistArtists
.Include(t => t.Tracks)
.OrderBy(a => a.Name)
.AsQueryable();
//filter by userName
if (!string.IsNullOrEmpty(resourceParams.UserName))
{
collectionBeforePaging = collectionBeforePaging
.Where(a => a.UserName == resourceParams.UserName);
}
//if name filter exists
if (!string.IsNullOrEmpty(resourceParams.Name))
{
collectionBeforePaging = collectionBeforePaging
.Where(a => a.Name == resourceParams.Name);
}
//searh if exists
if (!string.IsNullOrEmpty(resourceParams.SearchQuery))
{
collectionBeforePaging = collectionBeforePaging
.Where(a => a.Name.Contains(resourceParams.SearchQuery));
}
return(PagedList <PlaylistArtist> .Create(collectionBeforePaging, resourceParams.PageNumber, resourceParams.PageSize));
}
public async Task <IActionResult> Get([FromQuery] PlaylistArtistResourceParameters resourceParameters)
{
var artists = _playlistArtistRepo.GetAllPagination(resourceParameters);
var mappedArtists = _mapper.Map <IEnumerable <PlaylistArtistDto> >(artists);
//construct links to previus+next page
var previousPage = artists.HasPrevious ?
_linkService.CreateResourceUri(resourceParameters, ResourceType.PreviousPage) : null;
var nextPage = artists.HasNext ?
_linkService.CreateResourceUri(resourceParameters, ResourceType.NextPage) : null;
mappedArtists = mappedArtists.Select(artist =>
{
artist = _linkService.CreateLinks(artist);
return(artist);
});
var paginationMetadata = new
{
totalCount = artists.TotalCount,
pageSize = artists.PageSize,
currentPage = artists.CurrentPage,
totalPages = artists.TotalPages,
previousPageLink = previousPage,
nextPageLink = nextPage
};
return(Ok(new
{
Values = mappedArtists,
Links = paginationMetadata
}));
}
