public PagedList <Fuel> GetFuel(FuelResourceParameters fuelParameters)
{
if (fuelParameters == null)
{
throw new ArgumentNullException(nameof(fuelParameters));
}
var collection = _context.Fuel as IQueryable <Fuel>;
if (!string.IsNullOrWhiteSpace(fuelParameters.SearchQuery))
{
var searchQuery = fuelParameters.SearchQuery.Trim();
collection = collection.Where(a => a.Name.Contains(searchQuery));
}
if (!string.IsNullOrWhiteSpace(fuelParameters.OrderBy))
{
var fuelPropertyMappingDictionary = _propertyMappingService.GetFuelPropertyMapping <FuelDto, Fuel>();
collection = collection.ApplySort(fuelParameters.OrderBy, fuelPropertyMappingDictionary);
}
//Paging.... happens LAST
return(PagedList <Fuel> .Create(collection,
fuelParameters.PageNumber,
fuelParameters.PageSize));
}
private IEnumerable <LinkDto> CreateLinksForFuel(
FuelResourceParameters fuelResourceParameters,
bool hasNext, bool hasPrevious)
{
var links = new List <LinkDto>();
// self
links.Add(
new LinkDto(CreateFuelResourceUri(
fuelResourceParameters, ResourceUriType.Current)
, "self", "GET"));
if (hasNext)
{
links.Add(
new LinkDto(CreateFuelResourceUri(
fuelResourceParameters, ResourceUriType.NextPage),
"nextPage", "GET"));
}
if (hasPrevious)
{
links.Add(
new LinkDto(CreateFuelResourceUri(
fuelResourceParameters, ResourceUriType.PreviousPage),
"previousPage", "GET"));
}
return(links);
}
public IActionResult GetFuelsByType(Guid fuelTypeId,
[FromQuery] FuelResourceParameters fuelResourceParameters)
{
if (!_propertyMappingService.ValidFuelMappingExistsFor <FuelDto, Entities.Fuel>
(fuelResourceParameters.OrderBy))
{
return(BadRequest());
}
var fuelFromRepo = _fuelRepository.GetFuelByType(fuelTypeId, fuelResourceParameters);
var paginationMetadata = new
{
totalCount = fuelFromRepo.TotalCount,
pageSize = fuelFromRepo.PageSize,
currentPage = fuelFromRepo.CurrentPage,
totalPages = fuelFromRepo.TotalPages
};
Response.Headers.Add("X-Pagination",
JsonSerializer.Serialize(paginationMetadata));
var links = CreateLinksForFuel(fuelResourceParameters,
fuelFromRepo.HasNext,
fuelFromRepo.HasPrevious);
var shapedFuel = _mapper.Map <IEnumerable <FuelDto> >(fuelFromRepo)
.ShapeData(fuelResourceParameters.Fields);
var shapedFuelTypesWithLinks = shapedFuel.Select(fuel =>
{
var fuelAsDictionary = fuel as IDictionary <string, object>;
var fuelLinks = CreateLinksForFuel(fuelTypeId.ToString(), (string)fuelAsDictionary["Id"], null);
fuelAsDictionary.Add("links", fuelLinks);
return(fuelAsDictionary);
});
var linkedCollectionResource = new
{
value = shapedFuelTypesWithLinks,
links
};
return(Ok(linkedCollectionResource));
}
private string CreateFuelResourceUri(
FuelResourceParameters fuelResourceParameters,
ResourceUriType type)
{
switch (type)
{
case ResourceUriType.PreviousPage:
return(Url.Link("GetFuel",
new
{
fields = fuelResourceParameters.Fields,
orderBy = fuelResourceParameters.OrderBy,
pageNumber = fuelResourceParameters.PageNumber - 1,
pageSize = fuelResourceParameters.PageSize,
searchQuery = fuelResourceParameters.SearchQuery
}));
case ResourceUriType.NextPage:
return(Url.Link("GetFuel",
new
{
fields = fuelResourceParameters.Fields,
orderBy = fuelResourceParameters.OrderBy,
pageNumber = fuelResourceParameters.PageNumber + 1,
pageSize = fuelResourceParameters.PageSize,
searchQuery = fuelResourceParameters.SearchQuery
}));
case ResourceUriType.Current:
default:
return(Url.Link("GetFuel",
new
{
fields = fuelResourceParameters.Fields,
orderBy = fuelResourceParameters.OrderBy,
pageNumber = fuelResourceParameters.PageNumber,
pageSize = fuelResourceParameters.PageSize,
searchQuery = fuelResourceParameters.SearchQuery
}));
}
}
