private IEnumerable <LinkDto> CreateLinksForCompany(
CompanyResourceParameters companyResourceParameters,
bool hasNext, bool hasPrevious)
{
var links = new List <LinkDto>();
// self
links.Add(
new LinkDto(CreateCompaniesResourceUri(
companyResourceParameters, ResourceUriType.Current)
, "self", "GET"));
if (hasNext)
{
links.Add(
new LinkDto(CreateCompaniesResourceUri(
companyResourceParameters, ResourceUriType.NextPage),
"nextPage", "GET"));
}
if (hasPrevious)
{
links.Add(
new LinkDto(CreateCompaniesResourceUri(
companyResourceParameters, ResourceUriType.PreviousPage),
"previousPage", "GET"));
}
return(links);
}
public PagedList <Company> GetCompanies(CompanyResourceParameters companiesResourceParameters)
{
if (companiesResourceParameters == null)
{
throw new ArgumentNullException(nameof(companiesResourceParameters));
}
var collection = _context.Company as IQueryable <Company>;
if (!string.IsNullOrWhiteSpace(companiesResourceParameters.Type))
{
var type = companiesResourceParameters.Type.Trim();
collection = collection.Where(a => a.Type == type);
}
if (!string.IsNullOrWhiteSpace(companiesResourceParameters.SearchQuery))
{
var searchQuery = companiesResourceParameters.SearchQuery.Trim();
collection = collection.Where(a => a.Type.Contains(searchQuery) ||
a.Name.Contains(searchQuery));
}
if (!string.IsNullOrWhiteSpace(companiesResourceParameters.OrderBy))
{
var companyPropertyMappingDictionary = _propertyMappingService.GetCompanyPropertyMapping <CompanyDto, Company>();
collection = collection.ApplySort(companiesResourceParameters.OrderBy, companyPropertyMappingDictionary);
}
//Paging.... happens LAST
return(PagedList <Company> .Create(collection,
companiesResourceParameters.PageNumber,
companiesResourceParameters.PageSize));
}
public IActionResult GetCompanies(
[FromQuery] CompanyResourceParameters companyResourceParameters)
{
if (!_propertyMappingService.ValidCompanyMappingExistsFor <CompanyDto, Entities.Company>
(companyResourceParameters.OrderBy))
{
return(BadRequest());
}
var companiesFromRepo = _companyRepository.GetCompanies(companyResourceParameters);
var paginationMetadata = new
{
totalCount = companiesFromRepo.TotalCount,
pageSize = companiesFromRepo.PageSize,
currentPage = companiesFromRepo.CurrentPage,
totalPages = companiesFromRepo.TotalPages
};
Response.Headers.Add("X-Pagination",
JsonSerializer.Serialize(paginationMetadata));
var links = CreateLinksForCompany(companyResourceParameters,
companiesFromRepo.HasNext,
companiesFromRepo.HasPrevious);
var shapedCompanies = _mapper.Map <IEnumerable <CompanyDto> >(companiesFromRepo)
.ShapeData(companyResourceParameters.Fields);
var shapedCompaniesWithLinks = shapedCompanies.Select(company =>
{
var companyAsDictionary = company as IDictionary <string, object>;
var companyLinks = CreateLinksForCompany((string)companyAsDictionary["Id"], null);
companyAsDictionary.Add("links", companyLinks);
return(companyAsDictionary);
});
var linkedCollectionResource = new
{
value = shapedCompaniesWithLinks,
links
};
return(Ok(linkedCollectionResource));
}
private string CreateCompaniesResourceUri(
CompanyResourceParameters companyResourceParameters,
ResourceUriType type)
{
switch (type)
{
case ResourceUriType.PreviousPage:
return(Url.Link("GetCompanies",
new
{
fields = companyResourceParameters.Fields,
orderBy = companyResourceParameters.OrderBy,
pageNumber = companyResourceParameters.PageNumber - 1,
pageSize = companyResourceParameters.PageSize,
mainCategory = companyResourceParameters.Type,
searchQuery = companyResourceParameters.SearchQuery
}));
case ResourceUriType.NextPage:
return(Url.Link("GetCompanies",
new
{
fields = companyResourceParameters.Fields,
orderBy = companyResourceParameters.OrderBy,
pageNumber = companyResourceParameters.PageNumber + 1,
pageSize = companyResourceParameters.PageSize,
mainCategory = companyResourceParameters.Type,
searchQuery = companyResourceParameters.SearchQuery
}));
case ResourceUriType.Current:
default:
return(Url.Link("GetCompanies",
new
{
fields = companyResourceParameters.Fields,
orderBy = companyResourceParameters.OrderBy,
pageNumber = companyResourceParameters.PageNumber,
pageSize = companyResourceParameters.PageSize,
mainCategory = companyResourceParameters.Type,
searchQuery = companyResourceParameters.SearchQuery
}));
}
}
