Autoloader for future and legacy namespaces

autoload.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SandFox\Bencode\Legacy;
+
+const NS = 'SandFox\\PhpStorm\\Metadata\\';
+const PREFIX_1 = 'Arokettu\\PhpStorm\\Metadata\\';
+const PREFIX_1_LEN = 27;
+const PREFIX_2 = 'SandFoxMe\\PhpStorm\\Metadata\\';
+const PREFIX_2_LEN = 28;
+
+spl_autoload_register(function (string $class_name) {
+    if (strncmp($class_name, PREFIX_1, PREFIX_1_LEN) === 0) {
+        $realName = NS . substr($class_name, PREFIX_1_LEN);
+        class_alias($realName, $class_name);
+        return true;
+    }
+
+    if (strncmp($class_name, PREFIX_2, PREFIX_2_LEN) === 0) {
+        $realName = NS . substr($class_name, PREFIX_2_LEN);
+        class_alias($realName, $class_name);
+        return true;
+    }
+
+    return null;
+});

composer.json

@@ -12,13 +12,18 @@
         }
     ],
     "config": {
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true
+        },
         "sort-packages": true
     },
     "autoload": {
         "psr-4": {
-            "SandFox\\PhpStorm\\Metadata\\": "src",
-            "SandFoxMe\\PhpStorm\\Metadata\\": "legacy"
-        }
+            "SandFox\\PhpStorm\\Metadata\\": "src"
+        },
+        "files": [
+            "autoload.php"
+        ]
     },
     "require": {
         "php": "^7.0 || ^8.0",