From eab102440cdd767336d723cdaf0a361a91b80e38 Mon Sep 17 00:00:00 2001
From: Priyadi Iman Nurcahyo <1102197+priyadi@users.noreply.github.com>
Date: Mon, 15 Jan 2024 13:07:01 +0700
Subject: [PATCH] fix(`MainTransformer`): Fix possible bug involving an
 existing target.

---
 CHANGELOG.md                            |  1 +
 src/MainTransformer/MainTransformer.php | 15 ++++++++-------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f7014cc..1cee8ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@
 * test: Mapping test first version.
 * refactor: rename `RefuseToHandleException` to `RefuseToTransformException`.
 * perf(`CopyTransformer`): Move identity check to the beginning.
+* fix(`MainTransformer`): Fix possible bug involving an existing target.
 
 ## 0.5.10
 
diff --git a/src/MainTransformer/MainTransformer.php b/src/MainTransformer/MainTransformer.php
index de7cc6d..d9f8e51 100644
--- a/src/MainTransformer/MainTransformer.php
+++ b/src/MainTransformer/MainTransformer.php
@@ -76,14 +76,15 @@ public function transform(
         Context $context,
         string $path = null,
     ): mixed {
-        // if targettype is not provided, guess it from target
-        // if the target is also missing then the target is mixed
-
-        if (count($targetTypes) === 0) {
-            if ($target === null) {
+        // if target is provided, guess the type from it.
+        // if target is not provided, use the provided target type. if it is
+        // also not provided, then the target type is mixed.
+
+        if ($target !== null) {
+            $targetTypes = [$this->typeResolver->guessTypeFromVariable($target)];
+        } else {
+            if (count($targetTypes) === 0) {
                 $targetTypes = [MixedType::instance()];
-            } else {
-                $targetTypes = [$this->typeResolver->guessTypeFromVariable($target)];
             }
         }