fix search response

services/search/pkg/query/error.go

@@ -0,0 +1,47 @@
+package query
+
+import (
+	"fmt"
+
+	"github.com/owncloud/ocis/v2/services/search/pkg/query/ast"
+)
+
+// StartsWithBinaryOperatorError records an error and the operation that caused it.
+type StartsWithBinaryOperatorError struct {
+	Node *ast.OperatorNode
+}
+
+func (e StartsWithBinaryOperatorError) Error() string {
+	return "the expression can't begin from a binary operator: '" + e.Node.Value + "'"
+}
+
+// NamedGroupInvalidNodesError records an error and the operation that caused it.
+type NamedGroupInvalidNodesError struct {
+	Node ast.Node
+}
+
+func (e NamedGroupInvalidNodesError) Error() string {
+	return fmt.Errorf(
+		"'%T' - '%v' - '%v' is not valid",
+		e.Node,
+		ast.NodeKey(e.Node),
+		ast.NodeValue(e.Node),
+	).Error()
+}
+
+// UnsupportedTimeRangeError records an error and the value that caused it.
+type UnsupportedTimeRangeError struct {
+	Value interface{}
+}
+
+func (e UnsupportedTimeRangeError) Error() string {
+	return fmt.Sprintf("unable to convert '%v' to a time range", e.Value)
+}
+
+func IsValidationError(err error) bool {
+	switch err.(type) {
+	case *StartsWithBinaryOperatorError, *NamedGroupInvalidNodesError, *UnsupportedTimeRangeError:
+		return true
+	}
+	return false
+}