Elasticsearch: data query refactor (#113360)

* split up data_query.go

* split up response_parser

* remove white space

pkg/tsdb/elasticsearch/data_query_validator.go

@@ -0,0 +1,36 @@
+package elasticsearch
+
+import (
+	"fmt"
+)
+
+// isQueryWithError validates the query and returns an error if invalid
+func isQueryWithError(query *Query) error {
+	if len(query.BucketAggs) == 0 {
+		// If no aggregations, only document and logs queries are valid
+		if len(query.Metrics) == 0 || (!isLogsQuery(query) && !isDocumentQuery(query)) {
+			return fmt.Errorf("invalid query, missing metrics and aggregations")
+		}
+	}
+	return nil
+}
+
+// isLogsQuery checks if the query is a logs query
+func isLogsQuery(query *Query) bool {
+	return len(query.Metrics) > 0 && query.Metrics[0].Type == logsType
+}
+
+// isDocumentQuery checks if the query is a document query (raw_data or raw_document)
+func isDocumentQuery(query *Query) bool {
+	return isRawDataQuery(query) || isRawDocumentQuery(query)
+}
+
+// isRawDataQuery checks if the query is a raw_data query
+func isRawDataQuery(query *Query) bool {
+	return len(query.Metrics) > 0 && query.Metrics[0].Type == rawDataType
+}
+
+// isRawDocumentQuery checks if the query is a raw_document query
+func isRawDocumentQuery(query *Query) bool {
+	return len(query.Metrics) > 0 && query.Metrics[0].Type == rawDocumentType
+}