From c575c4e34f34b8db30d1b387b9b2e290500a2aff Mon Sep 17 00:00:00 2001
From: Timo Stamm <ts@timostamm.de>
Date: Tue, 22 Apr 2025 15:58:27 +0200
Subject: [PATCH] Implement getField CEL function

---
 packages/protovalidate/src/cel.ts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/packages/protovalidate/src/cel.ts b/packages/protovalidate/src/cel.ts
index 174b7f7f..58b29c61 100644
--- a/packages/protovalidate/src/cel.ts
+++ b/packages/protovalidate/src/cel.ts
@@ -24,6 +24,7 @@ import {
   type CelEnv,
   CelError,
   CelList,
+  CelObject,
   type CelResult,
   type CelVal,
   createEnv,
@@ -234,6 +235,18 @@ function createCustomFuncs(): FuncRegistry {
       },
     ),
   );
+  reg.add(
+    Func.binary(
+      "getField",
+      ["dyn_string_get_field_dyn"],
+      (id: number, lhs: CelVal, rhs: CelVal): CelResult | undefined => {
+        if (typeof rhs == "string" && lhs instanceof CelObject) {
+          return lhs.accessByName(id, rhs);
+        }
+        return undefined;
+      },
+    ),
+  );
   return reg;
 }