private IEnumerable <LinkDTO> CreateLinksForSupermarketStocks(StockResourceParameters stockResourceParameters,
bool hasNext, bool hasPrevious)
{
var links = new List <LinkDTO>();
// self
links.Add(
new LinkDTO(CreateStockResourceUri(stockResourceParameters,
ResourceUriType.Current)
, "self", "GET"));
if (hasNext)
{
links.Add(
new LinkDTO(CreateStockResourceUri(stockResourceParameters,
ResourceUriType.NextPage),
"nextPage", "GET"));
}
if (hasPrevious)
{
links.Add(
new LinkDTO(CreateStockResourceUri(stockResourceParameters,
ResourceUriType.PreviousPage),
"previousPage", "GET"));
}
return(links);
}
public PagedList <SupermarketStock> GetAllStock(StockResourceParameters stockResourceParameters)
{
var collectionBeforePaging =
_context.SupermarketStocks.ApplySort(stockResourceParameters.OrderBy,
_stockPropertyMappingService.GetPropertyMapping <SupermarketStockDTO, SupermarketStock>());
return(PagedList <SupermarketStock> .Create(collectionBeforePaging,
stockResourceParameters.PageNumber,
stockResourceParameters.PageSize));
}
private string CreateStockResourceUri(
StockResourceParameters stockResourceParameters,
ResourceUriType type)
{
switch (type)
{
case ResourceUriType.PreviousPage:
return(_urlHelper.Link("GetAllStock",
new
{
fields = stockResourceParameters.Fields,
orderBy = stockResourceParameters.OrderBy,
pageNumber = stockResourceParameters.PageNumber - 1,
pageSize = stockResourceParameters.PageSize
}));
case ResourceUriType.NextPage:
return(_urlHelper.Link("GetAllStock",
new
{
fields = stockResourceParameters.Fields,
orderBy = stockResourceParameters.OrderBy,
pageNumber = stockResourceParameters.PageNumber + 1,
pageSize = stockResourceParameters.PageSize
}));
default:
return(_urlHelper.Link("GetAllStock",
new
{
fields = stockResourceParameters.Fields,
orderBy = stockResourceParameters.OrderBy,
pageNumber = stockResourceParameters.PageNumber,
pageSize = stockResourceParameters.PageSize
}));
}
}
public IActionResult GetAllStock(StockResourceParameters stockResourceParameters,
[FromHeader(Name = "Accept")] string mediaType)
{
// check mappings are valid
if (!_stockMappingService.ValidMappingExistsFor <SupermarketStockDTO, SupermarketStock>
(stockResourceParameters.OrderBy))
{
return(BadRequest());
}
// check all fields are valid
if (!_typeHelperService.TypeHasProperties <SupermarketStockDTO>
(stockResourceParameters.Fields))
{
return(BadRequest());
}
// get all stock from repo
var stockFromRepo = _supermarketRepository.GetAllStock(stockResourceParameters);
var stock = Mapper.Map <IEnumerable <SupermarketStockDTO> >(stockFromRepo);
if (mediaType == "application/vnd.idp.hateoas+json")
{
var paginationMetadata = new
{
totalCount = stockFromRepo.TotalCount,
pageSize = stockFromRepo.PageSize,
currentPage = stockFromRepo.CurrentPage,
totalPages = stockFromRepo.TotalPages,
};
Response.Headers.Add("X-Pagination",
JsonConvert.SerializeObject(paginationMetadata));
var links = CreateLinksForSupermarketStocks(stockResourceParameters,
stockFromRepo.HasNext, stockFromRepo.HasPrevious);
var shapedStocks = stock.ShapeData(stockResourceParameters.Fields);
var shapedStocksWithLinks = shapedStocks.Select(stocks =>
{
var stockAsDictionary = stocks as IDictionary <string, object>;
var stockLinks = CreateLinksForSupermarketStock(
(int)stockAsDictionary["Id"], stockResourceParameters.Fields);
stockAsDictionary.Add("links", stockLinks);
return(stockAsDictionary);
});
var linkedCollectionResource = new
{
value = shapedStocksWithLinks,
links = links
};
return(Ok(linkedCollectionResource));
}
else
{
var previousPageLink = stockFromRepo.HasPrevious ?
CreateProductResourceUri(stockResourceParameters,
ResourceUriType.PreviousPage) : null;
var nextPageLink = stockFromRepo.HasNext ?
CreateProductResourceUri(stockResourceParameters,
ResourceUriType.NextPage) : null;
var paginationMetadata = new
{
totalCount = stockFromRepo.TotalCount,
pageSize = stockFromRepo.PageSize,
currentPage = stockFromRepo.CurrentPage,
totalPages = stockFromRepo.TotalPages,
previousPageLink,
nextPageLink
};
Response.Headers.Add("X-Pagination",
JsonConvert.SerializeObject(paginationMetadata));
return(Ok(stock.ShapeData(stockResourceParameters.Fields)));
}
}
