private async Task <IQueryable <Metadata> > BuildQueryableAsync(string timeframe, string moderator = null)
{
// start with all records
var queryable = (await _repository.GetAllAsync()).AsQueryable();
// apply timeframe filter
MetadataFilters.ApplyTimeframeFilter(ref queryable, timeframe);
// apply moderator filter, if applicable
MetadataFilters.ApplyModeratorFilter(ref queryable, moderator);
return(queryable);
}
public async Task <IActionResult> GetAsync([FromQuery] DetectionQueryParameters queryParameters)
{
try
{
if (string.IsNullOrWhiteSpace(queryParameters.Timeframe))
{
throw new ArgumentNullException("Timeframe");
}
if (string.IsNullOrWhiteSpace(queryParameters.SortBy))
{
throw new ArgumentNullException("SortBy");
}
if (string.IsNullOrWhiteSpace(queryParameters.SortOrder))
{
throw new ArgumentNullException("SortOrder");
}
if (string.IsNullOrWhiteSpace(queryParameters.Location))
{
throw new ArgumentNullException("Location");
}
if (queryParameters.Page == 0)
{
throw new ArgumentNullException("Page");
}
if (queryParameters.RecordsPerPage == 0)
{
throw new ArgumentNullException("RecordsPerPage");
}
// start with all records
var queryable = (await _repository.GetAllAsync()).AsQueryable();
// apply timeframe filter
MetadataFilters.ApplyTimeframeFilter(ref queryable, queryParameters.Timeframe);
// apply location filter
if (queryParameters.Location.ToLower() != "all")
{
MetadataFilters.ApplyLocationFilter(ref queryable, queryParameters.Location);
}
// If no detections found
if (queryable == null || queryable.Count() == 0)
{
return(NoContent());
}
// total number of records
double recordCount = queryable.Count();
// apply sort filter
if (queryParameters.SortBy.ToLower() == "confidence")
{
MetadataFilters.ApplyConfidenceSortFilter(ref queryable, queryParameters.SortOrder);
}
else if (queryParameters.SortBy.ToLower() == "timestamp")
{
MetadataFilters.ApplyTimestampSortFilter(ref queryable, queryParameters.SortOrder);
}
// apply pagination filter
MetadataFilters.ApplyPaginationFilter(ref queryable, queryParameters.Page, queryParameters.RecordsPerPage);
// set page count headers
SetHeaderCounts(recordCount,
(queryParameters.RecordsPerPage > 0 ? queryParameters.RecordsPerPage :
MetadataFilters.DefaultRecordsPerPage));
// map to returnable data type and return
return(Ok(queryable.Select(x => MetadataProcessors.ToDetection(x)).ToList()));
}
catch (ArgumentNullException ex)
{
var details = new ProblemDetails()
{
Detail = ex.Message
};
return(BadRequest(details));
}
catch (Exception ex)
{
var details = new ProblemDetails()
{
Title = ex.GetType().ToString(),
Detail = ex.Message
};
return(StatusCode(StatusCodes.Status500InternalServerError, details));
}
}