1 files changed, 82 insertions, 0 deletions
diff --git a/vendor/github.com/olivere/elastic/search_aggs_bucket_nested.go b/vendor/github.com/olivere/elastic/search_aggs_bucket_nested.go
new file mode 100644
index 000000000..926d493a1
--- /dev/null
+++ b/vendor/github.com/olivere/elastic/search_aggs_bucket_nested.go
@@ -0,0 +1,82 @@
+// Copyright 2012-present Oliver Eilhard. All rights reserved.
+// Use of this source code is governed by a MIT-license.
+// See http://olivere.mit-license.org/license.txt for details.
+
+package elastic
+
+// NestedAggregation is a special single bucket aggregation that enables
+// aggregating nested documents.
+// See: https://www.elastic.co/guide/en/elasticsearch/reference/6.0/search-aggregations-bucket-nested-aggregation.html
+type NestedAggregation struct {
+	path            string
+	subAggregations map[string]Aggregation
+	meta            map[string]interface{}
+}
+
+func NewNestedAggregation() *NestedAggregation {
+	return &NestedAggregation{
+		subAggregations: make(map[string]Aggregation),
+	}
+}
+
+func (a *NestedAggregation) SubAggregation(name string, subAggregation Aggregation) *NestedAggregation {
+	a.subAggregations[name] = subAggregation
+	return a
+}
+
+// Meta sets the meta data to be included in the aggregation response.
+func (a *NestedAggregation) Meta(metaData map[string]interface{}) *NestedAggregation {
+	a.meta = metaData
+	return a
+}
+
+func (a *NestedAggregation) Path(path string) *NestedAggregation {
+	a.path = path
+	return a
+}
+
+func (a *NestedAggregation) Source() (interface{}, error) {
+	// Example:
+	//	{
+	//     "query" : {
+	//         "match" : { "name" : "led tv" }
+	//     }
+	//     "aggs" : {
+	//         "resellers" : {
+	//             "nested" : {
+	//                 "path" : "resellers"
+	//             },
+	//             "aggs" : {
+	//                 "min_price" : { "min" : { "field" : "resellers.price" } }
+	//             }
+	//         }
+	//     }
+	//	}
+	// This method returns only the { "nested" : {} } part.
+
+	source := make(map[string]interface{})
+	opts := make(map[string]interface{})
+	source["nested"] = opts
+
+	opts["path"] = a.path
+
+	// AggregationBuilder (SubAggregations)
+	if len(a.subAggregations) > 0 {
+		aggsMap := make(map[string]interface{})
+		source["aggregations"] = aggsMap
+		for name, aggregate := range a.subAggregations {
+			src, err := aggregate.Source()
+			if err != nil {
+				return nil, err
+			}
+			aggsMap[name] = src
+		}
+	}
+
+	// Add Meta data if available
+	if len(a.meta) > 0 {
+		source["meta"] = a.meta
+	}
+
+	return source, nil
+}