Feat: Support include filter for termAggs

aggregations_test.go

@@ -120,5 +120,41 @@ func TestAggregations(t *testing.T) {
 				},
 			},
 		},
+		{
+			"Single include for termsAggs",
+			//eq.Aggregate(eq.TermsAgg("a1", "FIELD1").Size(0).Aggs(eq.Sum("a2", "FIELD2.SUBFIELD")))
+			Aggregate(
+				TermsAgg("categories", "categories").
+					Include("red.*|blue.*"),
+			),
+			map[string]interface{}{
+				"aggs": map[string]interface{}{
+					"categories": map[string]interface{}{
+						"terms": map[string]interface{}{
+							"field":   "categories",
+							"include": "red.*|blue.*",
+						},
+					},
+				},
+			},
+		},
+		{
+			"Multi include for termsAggs",
+			//eq.Aggregate(eq.TermsAgg("a1", "FIELD1").Size(0).Aggs(eq.Sum("a2", "FIELD2.SUBFIELD")))
+			Aggregate(
+				TermsAgg("categories", "categories").
+					Include("red", "blue"),
+			),
+			map[string]interface{}{
+				"aggs": map[string]interface{}{
+					"categories": map[string]interface{}{
+						"terms": map[string]interface{}{
+							"field":   "categories",
+							"include": []string{"red", "blue"},
+						},
+					},
+				},
+			},
+		},
 	})
 }

aggs_bucket.go

@@ -13,6 +13,7 @@ type TermsAggregation struct {
 	showTermDoc *bool
 	aggs        []Aggregation
 	order       map[string]string
+	include     []string
 }
 
 // TermsAgg creates a new aggregation of type "terms". The method name includes
@@ -61,6 +62,12 @@ func (agg *TermsAggregation) Order(order map[string]string) *TermsAggregation {
 	return agg
 }
 
+// Include filter the values for  buckets
+func (agg *TermsAggregation) Include(include ...string) *TermsAggregation {
+	agg.include = include
+	return agg
+}
+
 // Map returns a map representation of the aggregation, thus implementing the
 // Mappable interface.
 func (agg *TermsAggregation) Map() map[string]interface{} {
@@ -81,6 +88,15 @@ func (agg *TermsAggregation) Map() map[string]interface{} {
 		innerMap["order"] = agg.order
 	}
 
+	if agg.include != nil {
+		if len(agg.include) <= 1 {
+			innerMap["include"] = agg.include[0]
+		} else {
+			innerMap["include"] = agg.include
+		}
+
+	}
+
 	outerMap := map[string]interface{}{
 		"terms": innerMap,
 	}