public PagedList <Center> GetCenters(CentersResourceParameters centersResourceParameters)
{
if (centersResourceParameters == null)
{
throw new ArgumentNullException(nameof(centersResourceParameters));
}
IQueryable <Center> centers = _dataContext.Centers as IQueryable <Center>;
if (!string.IsNullOrWhiteSpace(centersResourceParameters.Name))
{
var name = centersResourceParameters.Name.Trim();
centers = centers.Where(x => x.Name == name);
}
if (!string.IsNullOrWhiteSpace(centersResourceParameters.SearchQuery))
{
var searchQuery = centersResourceParameters.SearchQuery.Trim();
centers = centers.Where(x => x.Name.Contains(searchQuery) ||
x.Location.Contains(searchQuery));
}
if (!string.IsNullOrWhiteSpace(centersResourceParameters.OrderBy))
{
var centerPropertyMappingDictionary = _propertyMappingService.GetPropertyMapping <CenterDto, Center> ();
centers = centers.ApplySort(centersResourceParameters.OrderBy, centerPropertyMappingDictionary);
}
return(PagedList <Center> .Create(centers, centersResourceParameters.PageNumber, centersResourceParameters.PageSize));
}
public IActionResult GetCenters([FromQuery] CentersResourceParameters centersResourceParameters, [FromHeader(Name = "Accept")] string mediaType)
{
if (!MediaTypeHeaderValue.TryParse(mediaType, out MediaTypeHeaderValue parsedMediaType))
{
return(BadRequest(new
{
message = "Accept header mediaType is not allowed"
}));
}
if (!_propertyMappingService.ValidMappingExistsFor <CenterDto, Center> (centersResourceParameters.OrderBy))
{
return(BadRequest());
}
if (!_propertyCheckerService.TypeHasProperties <CenterDto> (centersResourceParameters.Fields))
{
return(BadRequest());
}
var centers = _centerRepository.GetCenters(centersResourceParameters);
var paginationMetadata = new
{
totalCount = centers.TotalCount,
pageSize = centers.PageSize,
currentPage = centers.CurrentPage,
totalPages = centers.TotalPages
};
Response.Headers.Add("X-Pagination", JsonSerializer.Serialize(paginationMetadata));
var links = CreateLinksForCenters(centersResourceParameters, centers.HasNext, centers.HasPrevious);
var shapeCenters = _mapper.Map <IEnumerable <CenterDto> > (centers).ShapeData(centersResourceParameters.Fields);
if (parsedMediaType.MediaType == "application/vnd.marvin.hateoas+json")
{
var shapeCentersWithLinks = shapeCenters.Select(center =>
{
var centerAsDictionary = center as IDictionary <string, object>;
var centerLinks = CreateLinksForCenter((Guid)centerAsDictionary["CenterId"], null);
centerAsDictionary.Add("links", centerLinks);
return(centerAsDictionary);
});
var linkedCollectionResource = new
{
value = shapeCentersWithLinks,
links,
};
return(Ok(linkedCollectionResource));
}
return(Ok(shapeCenters));
}
private string CreateCenterResourceUri(CentersResourceParameters centersResourceParameters, ResourceUriType type)
{
switch (type)
{
case ResourceUriType.PreviousPage:
return(Url.Link("GetCenters", new
{
fields = centersResourceParameters.Fields,
orderBy = centersResourceParameters.OrderBy,
pageNumber = centersResourceParameters.PageNumber - 1,
pageSize = centersResourceParameters.PageSize,
name = centersResourceParameters.Name,
searchQuery = centersResourceParameters.SearchQuery
}));
case ResourceUriType.NextPage:
return(Url.Link("GetCenters", new
{
fields = centersResourceParameters.Fields,
orderBy = centersResourceParameters.OrderBy,
pageNumber = centersResourceParameters.PageNumber + 1,
pageSize = centersResourceParameters.PageSize,
name = centersResourceParameters.Name,
searchQuery = centersResourceParameters.SearchQuery
}));
case ResourceUriType.Current:
default:
return(Url.Link("GetCenters", new
{
fields = centersResourceParameters.Fields,
orderBy = centersResourceParameters.OrderBy,
pageNumber = centersResourceParameters.PageNumber,
pageSize = centersResourceParameters.PageSize,
name = centersResourceParameters.Name,
searchQuery = centersResourceParameters.SearchQuery
}));
}
}
private IEnumerable <LinkDto> CreateLinksForCenters(CentersResourceParameters centersResourceParameters, bool hasNext, bool hasPrevious)
{
var links = new List <LinkDto> ();
// self
links.Add(
new LinkDto(CreateCenterResourceUri(
centersResourceParameters, ResourceUriType.Current), "self", "GET"));
if (hasNext)
{
links.Add(
new LinkDto(CreateCenterResourceUri(centersResourceParameters, ResourceUriType.NextPage),
"nextPage", "GET"));
}
if (hasPrevious)
{
links.Add(
new LinkDto(CreateCenterResourceUri(centersResourceParameters, ResourceUriType.PreviousPage),
"previousPage", "GET"));
}
return(links);
}
