public async Task <IActionResult> GetImages(ImagesResourceParameters imagesResourceParameters)
{
if (!this.propertyMappingService.ValidMappingExistsFor <ImageDto, Image>(imagesResourceParameters.OrderBy))
{
return(BadRequest());
}
if (!this.typeHelperService.TypeHasProperties <ImageDto>(imagesResourceParameters.Fields))
{
return(BadRequest());
}
var imagesFromRepo = await galleryRepository.GetImages(imagesResourceParameters);
var previousPageLink = imagesFromRepo.HasPrevious ? CreateImagesResourceUri(imagesResourceParameters,
ResourceUriType.PreviousPage) : null;
var nextPageLink = imagesFromRepo.HasNext ? CreateImagesResourceUri(imagesResourceParameters,
ResourceUriType.NextPage) : null;
var paginationMetadata = new
{
totalCount = imagesFromRepo.TotalCount,
pageSize = imagesFromRepo.PageSize,
currentPage = imagesFromRepo.CurrentPage,
totalPages = imagesFromRepo.TotalPages,
previousPageLink = previousPageLink,
nextPageLink = nextPageLink
};
Response.Headers.Add("X-Pagination",
Newtonsoft.Json.JsonConvert.SerializeObject(paginationMetadata));
var imagesToReturn = Mapper.Map <IEnumerable <ImageDto> >(imagesFromRepo);
imagesToReturn = imagesToReturn.Select(x =>
{
x = CreateLinksForImage(x);
return(x);
});
return(Ok(imagesToReturn.ShapeData(imagesResourceParameters.Fields)));
}
public async Task <PagedList <Image> > GetImages(ImagesResourceParameters imagesResourceParameters)
{
//var collection = this.context.Images
// .OrderBy(i => i.Title)
// .AsQueryable();
var collection = this.context.Images
.ApplySort(imagesResourceParameters.OrderBy,
propertyMappingService.GetPropertyMapping <ImageDto, Image>());
if (!string.IsNullOrEmpty(imagesResourceParameters.Title))
{
var titleForWhereClause = imagesResourceParameters.Title.Trim().ToLowerInvariant();
collection = collection.Where(x => x.Title.ToLowerInvariant() == titleForWhereClause);
}
return(await PagedList <Image> .Create(collection,
imagesResourceParameters.PageNumber,
imagesResourceParameters.PageSize));
}
private string CreateImagesResourceUri(ImagesResourceParameters imagesResourceParameters,
ResourceUriType type)
{
switch (type)
{
case ResourceUriType.PreviousPage:
return(this.urlHelper.Link("GetImages",
new
{
fields = imagesResourceParameters.Fields,
orderBy = imagesResourceParameters.OrderBy,
title = imagesResourceParameters.Title,
pageNumber = imagesResourceParameters.PageNumber - 1,
pageSize = imagesResourceParameters.PageSize
}));
case ResourceUriType.NextPage:
return(this.urlHelper.Link("GetImages",
new
{
fields = imagesResourceParameters.Fields,
orderBy = imagesResourceParameters.OrderBy,
title = imagesResourceParameters.Title,
pageNumber = imagesResourceParameters.PageNumber + 1,
pageSize = imagesResourceParameters.PageSize
}));
default:
return(this.urlHelper.Link("GetAuthors",
new
{
fields = imagesResourceParameters.Fields,
orderBy = imagesResourceParameters.OrderBy,
title = imagesResourceParameters.Title,
pageNumber = imagesResourceParameters.PageNumber,
pageSize = imagesResourceParameters.PageSize
}));
}
}
