private IEnumerable <LinkDto> CreateLinksForDevice(
DeviceResourceParameters deviceResourceParameters,
bool hasNext, bool hasPrevious)
{
var links = new List <LinkDto>();
// self
links.Add(
new LinkDto(CreateDevicesResourceUri(
deviceResourceParameters, ResourceUriType.Current)
, "self", "GET"));
if (hasNext)
{
links.Add(
new LinkDto(CreateDevicesResourceUri(
deviceResourceParameters, ResourceUriType.NextPage),
"nextPage", "GET"));
}
if (hasPrevious)
{
links.Add(
new LinkDto(CreateDevicesResourceUri(
deviceResourceParameters, ResourceUriType.PreviousPage),
"previousPage", "GET"));
}
return(links);
}
public PagedList <Device> GetDevices(DeviceResourceParameters deviceResourseParameters)
{
if (deviceResourseParameters == null)
{
throw new ArgumentNullException(nameof(deviceResourseParameters));
}
if (deviceResourseParameters.TerminalId == Guid.Empty)
{
throw new ArgumentNullException(nameof(deviceResourseParameters));
}
var collection = _context.Device as IQueryable <Device>;
collection = collection.Where(a => a.TerminalId == deviceResourseParameters.TerminalId);
if (!string.IsNullOrWhiteSpace(deviceResourseParameters.SearchQuery))
{
var searchQuery = deviceResourseParameters.SearchQuery.Trim();
collection = collection.Where(a => a.ModelName.Contains(searchQuery) || a.SerialNumber.Contains(searchQuery));
}
if (!string.IsNullOrWhiteSpace(deviceResourseParameters.OrderBy))
{
var devicePropertyMappingDictionary = _propertyMappingService.GetDevicePropertyMapping <DevicesDto, Device>();
collection = collection.ApplySort(deviceResourseParameters.OrderBy, devicePropertyMappingDictionary);
}
//Paging.... happens LAST
return(PagedList <Device> .Create(collection,
deviceResourseParameters.PageNumber,
deviceResourseParameters.PageSize));
}
public IActionResult GetDevices(Guid terminalId,
[FromQuery] DeviceResourceParameters deviceResourceParameters)
{
if (!_propertyMappingService.ValidDeviceMappingExistsFor <DevicesDto, Entities.Device>
(deviceResourceParameters.OrderBy))
{
return(BadRequest());
}
deviceResourceParameters.TerminalId = terminalId;
var devicesFromRepo = _deviceRepository.GetDevices(deviceResourceParameters);
var paginationMetadata = new
{
totalCount = devicesFromRepo.TotalCount,
pageSize = devicesFromRepo.PageSize,
currentPage = devicesFromRepo.CurrentPage,
totalPages = devicesFromRepo.TotalPages
};
Response.Headers.Add("X-Pagination",
JsonSerializer.Serialize(paginationMetadata));
var links = CreateLinksForDevice(deviceResourceParameters,
devicesFromRepo.HasNext,
devicesFromRepo.HasPrevious);
var shapedDevices = _mapper.Map <IEnumerable <DevicesDto> >(devicesFromRepo)
.ShapeData(deviceResourceParameters.Fields);
var shapedDevicesWithLinks = shapedDevices.Select(devices =>
{
var deviceAsDictionary = devices as IDictionary <string, object>;
var deviceLinks = CreateLinksForDevice(terminalId.ToString(), (string)deviceAsDictionary["Id"], null);
deviceAsDictionary.Add("links", deviceLinks);
return(deviceAsDictionary);
});
var linkedCollectionResource = new
{
value = shapedDevicesWithLinks,
links
};
return(Ok(linkedCollectionResource));
}
private string CreateDevicesResourceUri(
DeviceResourceParameters deviceResourceParameters,
ResourceUriType type)
{
switch (type)
{
case ResourceUriType.PreviousPage:
return(Url.Link("GetDevices",
new
{
fields = deviceResourceParameters.Fields,
orderBy = deviceResourceParameters.OrderBy,
pageNumber = deviceResourceParameters.PageNumber - 1,
pageSize = deviceResourceParameters.PageSize,
searchQuery = deviceResourceParameters.SearchQuery
}));
case ResourceUriType.NextPage:
return(Url.Link("GetDevices",
new
{
fields = deviceResourceParameters.Fields,
orderBy = deviceResourceParameters.OrderBy,
pageNumber = deviceResourceParameters.PageNumber + 1,
pageSize = deviceResourceParameters.PageSize,
searchQuery = deviceResourceParameters.SearchQuery
}));
case ResourceUriType.Current:
default:
return(Url.Link("GetDevices",
new
{
fields = deviceResourceParameters.Fields,
orderBy = deviceResourceParameters.OrderBy,
pageNumber = deviceResourceParameters.PageNumber,
pageSize = deviceResourceParameters.PageSize,
searchQuery = deviceResourceParameters.SearchQuery
}));
}
}
