From a8532c2cb9b257327d7b79c41d2cf3b6aba3b714 Mon Sep 17 00:00:00 2001
From: Caleb White <cdwhite3@pm.me>
Date: Sat, 13 Sep 2025 22:52:35 -0500
Subject: [PATCH 1/2] fix: EnumCaseToPascalCaseRector skips existing pascal
 case

---
 .../Fixture/skip_existing_pascal.php.inc      | 11 ++++++++++
 .../Enum_/EnumCaseToPascalCaseRector.php      | 21 +++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 rules-tests/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector/Fixture/skip_existing_pascal.php.inc

diff --git a/rules-tests/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector/Fixture/skip_existing_pascal.php.inc b/rules-tests/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector/Fixture/skip_existing_pascal.php.inc
new file mode 100644
index 00000000000..075ae7d5801
--- /dev/null
+++ b/rules-tests/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector/Fixture/skip_existing_pascal.php.inc
@@ -0,0 +1,11 @@
+<?php
+
+namespace Rector\Tests\CodingStyle\Rector\Enum_\EnumCaseToPascalCaseRector\Fixture;
+
+enum SkipExistingPascal
+{
+    case Pending;
+    case Published;
+    case InReview;
+    case WaitingForApproval;
+}
diff --git a/rules/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector.php b/rules/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector.php
index 86219b542eb..6ddf25c777d 100644
--- a/rules/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector.php
+++ b/rules/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector.php
@@ -187,7 +187,28 @@ private function refactorClassConstFetch(ClassConstFetch $classConstFetch): ?Nod
 
     private function convertToPascalCase(string $name): string
     {
+        if ($this->isPascalCase($name)) {
+            return $name;
+        }
+
         $parts = explode('_', strtolower($name));
         return implode('', array_map(ucfirst(...), $parts));
     }
+
+    private function isPascalCase(string $name): bool
+    {
+        if (! ctype_upper($name[0])) {
+            return false;
+        }
+
+        if (str_contains($name, '_')) {
+            return false;
+        }
+
+        if (strtoupper($name) === $name) {
+            return false;
+        }
+
+        return true;
+    }
 }

From 2a86213b3828dab9b9e99caa4097750931d928c4 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Sun, 14 Sep 2025 14:52:30 +0700
Subject: [PATCH 2/2] use existing convertToPascalCase

---
 .../Enum_/EnumCaseToPascalCaseRector.php      | 36 +++++++------------
 1 file changed, 13 insertions(+), 23 deletions(-)

diff --git a/rules/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector.php b/rules/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector.php
index 6ddf25c777d..7d64f768521 100644
--- a/rules/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector.php
+++ b/rules/CodingStyle/Rector/Enum_/EnumCaseToPascalCaseRector.php
@@ -187,28 +187,18 @@ private function refactorClassConstFetch(ClassConstFetch $classConstFetch): ?Nod
 
     private function convertToPascalCase(string $name): string
     {
-        if ($this->isPascalCase($name)) {
-            return $name;
-        }
-
-        $parts = explode('_', strtolower($name));
-        return implode('', array_map(ucfirst(...), $parts));
-    }
-
-    private function isPascalCase(string $name): bool
-    {
-        if (! ctype_upper($name[0])) {
-            return false;
-        }
-
-        if (str_contains($name, '_')) {
-            return false;
-        }
-
-        if (strtoupper($name) === $name) {
-            return false;
-        }
-
-        return true;
+        $parts = explode('_', $name);
+        return implode(
+            '',
+            array_map(
+                fn ($part): string =>
+                // If part is all uppercase, convert to ucfirst(strtolower())
+                // If part is already mixed or PascalCase, keep as is except ucfirst
+                ctype_upper((string) $part)
+                    ? ucfirst(strtolower((string) $part))
+                    : ucfirst((string) $part),
+                $parts
+            )
+        );
     }
 }