From 8f70301fb6f18e71ed3a9e1b649ba0cea0779719 Mon Sep 17 00:00:00 2001
From: Sven Slootweg <admin@cryto.net>
Date: Tue, 8 Sep 2020 16:31:38 +0200
Subject: [PATCH] Pass path to custom merger functions as well

---
 index.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 900a40a..4b1fdd7 100644
--- a/index.js
+++ b/index.js
@@ -14,6 +14,9 @@ const wrapPath = require("@validatem/wrap-path");
 
 /* NOTE: In some cases below, we explicitly check for `undefined` only, rather than for both `undefined` and `null`. This is to allow explicitly overriding existent values with `null` during a merge. */
 
+// FIXME: Prevent prototype pollution
+// FIXME: Figure out an ergonomic way to do nested array merging (ie. flattening)
+
 function wrapValidationPath(basePathSegments, lastProperty, rules) {
 	let combinedPath = basePathSegments.concat(virtualProperty(lastProperty));
 
@@ -85,7 +88,7 @@ function mergeValue(rule, a, b, path) {
 		} else if (b === undefined) {
 			return a;
 		} else {
-			return rule(a, b);
+			return rule(a, b, path);
 		}
 	} else if (typeof rule === "object") {
 		if (Array.isArray(rule)) {