private SearchAggregationItem GetBucketAggregation(Nest.KeyedBucket <object> aggregate)
{
var aggregationItem = new SearchAggregationItem(aggregate.Key.ToString())
{
Count = aggregate.DocCount
};
if (aggregate.Aggregations != null)
{
//Check aggregated data [BucketAggregate] rappresent nested nodes
if (aggregate.Aggregations.Any(d => (d.Value as Nest.BucketAggregate) != null))
{
aggregationItem.Items = GetAggregations(aggregate.Aggregations);
}
//Get all value aggregated data (Value Type (Sum, Avg,Count etc..)
aggregate.Aggregations.Where(d => (d.Value as Nest.ValueAggregate) != null)
.ForEach(dd =>
{
aggregationItem.Items.Add(new SearchAggregationItem(dd.Key)
{
Count = (dd.Value as ValueAggregate).Value,
});
});
}
return(aggregationItem);
}
private IList <SearchAggregationItem> GetAggregations(IReadOnlyDictionary <string, IAggregate> source)
{
List <SearchAggregationItem> aggregations = new List <SearchAggregationItem>();
foreach (var item in source)
{
SearchAggregationItem currentAgg = new SearchAggregationItem(item.Key);
var currentBucket = item.Value as Nest.BucketAggregate;
if (currentBucket != null && currentBucket.Items.Count() > 0)
{
foreach (var agg in currentBucket.Items)
{
var aggBucket = agg as Nest.KeyedBucket <object>;
var aggregationItem = GetBucketAggregation(aggBucket);
// If current bucket dosent have another aggregation
// means all aggregated data are belonging to the current aggregation
// *Otherwise the result belong to the Parent aggregation
//ex : Distinct Count (Term)
if (aggBucket.Aggregations == null)
{
currentAgg.Items.Add(aggregationItem);
}
else
{
aggregationItem.Parentkey = currentAgg.Key;
aggregations.Add(aggregationItem);
}
}
}
else
{
var valueAgg = item.Value as Nest.ValueAggregate;
currentAgg.Count = valueAgg.Value;
aggregations.Add(currentAgg);
}
if (currentAgg.Items.Count() > 0)
{
aggregations.Add(currentAgg);
}
}
return(aggregations);
}
