Initial QSfera import

Server/pkg/kql/validate.go

@@ -0,0 +1,37 @@
+package kql
+
+import (
+	"github.com/qsfera/server/pkg/ast"
+	"github.com/qsfera/server/services/search/pkg/query"
+)
+
+func validateAst(a *ast.Ast) error {
+	switch node := a.Nodes[0].(type) {
+	case *ast.OperatorNode:
+		switch node.Value {
+		case BoolAND, BoolOR:
+			return &query.StartsWithBinaryOperatorError{Node: node}
+		}
+	}
+	return nil
+}
+
+func validateGroupNode(n *ast.GroupNode) error {
+	switch node := n.Nodes[0].(type) {
+	case *ast.OperatorNode:
+		switch node.Value {
+		case BoolAND, BoolOR:
+			return &query.StartsWithBinaryOperatorError{Node: node}
+		}
+	}
+
+	if n.Key != "" {
+		for _, node := range n.Nodes {
+			if ast.NodeKey(node) != "" {
+				return &query.NamedGroupInvalidNodesError{Node: node}
+			}
+		}
+	}
+
+	return nil
+}