public async Task <ActionResult> GetDataflows([FromQuery] DataflowResourceParameters pagedResourceParameters, CancellationToken ct)
{
var dataflowDtos = await _dataflowService.GetDataflowsAsync(pagedResourceParameters, ct);
var previousPageLink = dataflowDtos.HasPrevious ? CreateDataflowsResourceUri(pagedResourceParameters, Enums.ResourceUriType.PreviousPage) : null;
var nextPageLink = dataflowDtos.HasNext ? CreateDataflowsResourceUri(pagedResourceParameters, Enums.ResourceUriType.NextPage) : null;
var paginationMetadata = new
{
totalCount = dataflowDtos.TotalCount,
pageSize = dataflowDtos.PageSize,
currentPage = dataflowDtos.CurrentPage,
totalPages = dataflowDtos.TotalPages,
previousPageLink,
nextPageLink
};
if (dataflowDtos == null)
{
return(NotFound());
}
Response.Headers.Add("X-Pagination", JsonConvert.SerializeObject(paginationMetadata));
return(Ok(dataflowDtos));
}
public async Task <PagedList <DataflowDto> > GetDataflowsAsync(DataflowResourceParameters resourceParameters, CancellationToken ct)
{
var dataflowEntities = _uow.Dataflows.GetAll();
if (!string.IsNullOrEmpty(resourceParameters.Status))
{
if (Enum.TryParse(resourceParameters.Status, true, out DataflowStatus status))
{
dataflowEntities = dataflowEntities.Where(a => a.Status == status);
}
}
if (!string.IsNullOrEmpty(resourceParameters.SearchQuery))
{
var searchQueryForWhereClause = resourceParameters.SearchQuery.Trim().ToLowerInvariant();
dataflowEntities = dataflowEntities
.Where(a => a.Name.ToLowerInvariant().Contains(searchQueryForWhereClause) ||
a.Tag.ToLowerInvariant().Contains(searchQueryForWhereClause));
}
var pagedListEntities = await PagedList <Dataflow> .CreateAsync(dataflowEntities,
resourceParameters.PageNumber, resourceParameters.PageSize, ct);
var result = _mapper.Map <PagedList <DataflowDto> >(pagedListEntities);
result.TotalCount = pagedListEntities.TotalCount;
result.TotalPages = pagedListEntities.TotalPages;
result.CurrentPage = pagedListEntities.CurrentPage;
result.PageSize = pagedListEntities.PageSize;
return(result);
}
private string CreateDataflowsResourceUri(DataflowResourceParameters pagedResourceParameters, Enums.ResourceUriType type)
{
switch (type)
{
case Enums.ResourceUriType.PreviousPage:
return(_linkGenerator.GetUriByName(this.HttpContext, "GetDataflows",
new
{
status = pagedResourceParameters.Status,
searchQuery = pagedResourceParameters.SearchQuery,
pageNumber = pagedResourceParameters.PageNumber - 1,
pageSize = pagedResourceParameters.PageSize
})); // TODO get the aboslute path
case Enums.ResourceUriType.NextPage:
return(_linkGenerator.GetUriByName(this.HttpContext, "GetDataflows",
new
{
status = pagedResourceParameters.Status,
searchQuery = pagedResourceParameters.SearchQuery,
pageNumber = pagedResourceParameters.PageNumber + 1,
pageSize = pagedResourceParameters.PageSize
}));
default:
return(_linkGenerator.GetUriByName(this.HttpContext, "GetDataflows",
new
{
status = pagedResourceParameters.Status,
searchQuery = pagedResourceParameters.SearchQuery,
pageNumber = pagedResourceParameters.PageNumber,
pageSize = pagedResourceParameters.PageSize
}));
}
}