add Summary proto definition

Signed-off-by: Avinal Kumar <[email protected]>

proto/v1alpha2/api.proto

@@ -92,6 +92,18 @@ service Results {
       delete: "/apis/results.tekton.dev/v1alpha2/parents/{name=*/results/*/records/*}"
     };
   }
+
+  rpc GetResultSummary(GetResultRequest) returns (Summary) {
+    option (google.api.http) = {
+      get: "/apis/results.tekton.dev/v1alpha2/parents/{name=*/results/*}/summary"
+    };
+  }
+
+  rpc GetResultsListSummary(ResultListSummaryRequest) returns (Summary) {
+    option (google.api.http) = {
+      get: "/apis/results.tekton.dev/v1alpha2/parents/{parent=*}/results/summary"
+    };
+  }
 }
 
 service Logs {
@@ -163,6 +175,18 @@ message GetResultRequest {
     }];
 }
 
+message ResultListSummaryRequest {
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      child_type: "tekton.results.v1alpha2/Result"
+    }];
+
+  string filter = 2;
+
+  string group_by = 3;
+}
+
 message ListResultsRequest {
   string parent = 1 [
     (google.api.field_behavior) = REQUIRED,

proto/v1alpha2/resources.proto

@@ -175,4 +175,20 @@ message LogSummary {
 
   // Number of bytes received while streaming
   int64 bytesReceived = 2;
-}
+}
+
+message Summary {
+  // The query that was used to generate this summary
+  string query = 1;
+
+  // The criteria for grouping
+  string group_by = 2;
+
+  // The aggregated results of the query. It is a map of the form "group-name" : <map-of-aggregations>
+  // for a non grouped response it is "default": <map-of-aggregations>
+  map<string, Aggregations> data = 3;
+}
+
+message Aggregations {
+  map<string, string> aggregations = 1;
+}