Corrected blacklist patterns

Author: sivaschenko

app/code/Magento/MediaGallery/Model/Directory/IsBlacklisted.php

@@ -10,14 +10,12 @@
 use Magento\MediaGalleryApi\Model\Directory\IsBlacklistedInterface;
 
 /**
- * Directories blacklisted for media gallery. This class should be used for DI configuration.
- *
- * Please use the interface in the code (for constructor injection) instead of this implementation.
- *
- * @api
+ * Check if the path is blacklisted for media gallery. Directory path may be blacklisted if it's reserved by the system
  */
 class IsBlacklisted implements IsBlacklistedInterface
 {
+    const XML_PATH_BLACKLIST_PATTERNS = 'blacklist/patterns';
+
     /**
      * @var Config
      */
@@ -26,7 +24,8 @@ class IsBlacklisted implements IsBlacklistedInterface
     /**
      * @param Config $config
      */
-    public function __construct(Config $config) {
+    public function __construct(Config $config)
+    {
         $this->config = $config;
     }
 
@@ -38,7 +37,7 @@ public function __construct(Config $config) {
      */
     public function execute(string $path): bool
     {
-        foreach ($this->config->get('blacklist/patterns') as $pattern) {
+        foreach ($this->config->get(self::XML_PATH_BLACKLIST_PATTERNS) as $pattern) {
             if (empty($pattern)) {
                 continue;
             }

app/code/Magento/MediaGallery/etc/directory.xml

@@ -8,14 +8,14 @@
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_MediaGallery:etc/directory.xsd">
     <blacklist>
         <patterns>
-            <pattern name="captcha">/pub\/media\/captcha/</pattern>
-            <pattern name="catalog">/pub\/media\/catalog\/product/</pattern>
-            <pattern name="customer">/pub\/media\/customer/</pattern>
-            <pattern name="downloadable">/pub\/media\/downloadable/</pattern>
-            <pattern name="import">/pub\/media\/import/</pattern>
-            <pattern name="theme">/pub\/media\/theme/</pattern>
-            <pattern name="theme_customization">/pub\/media\/theme_customization/</pattern>
-            <pattern name="tmp">/pub\/media\/tmp/</pattern>
+            <pattern name="captcha">/^captcha/</pattern>
+            <pattern name="catalog">/^catalog\/product/</pattern>
+            <pattern name="customer">/^customer/</pattern>
+            <pattern name="downloadable">/^downloadable/</pattern>
+            <pattern name="import">/^import/</pattern>
+            <pattern name="theme">/^theme/</pattern>
+            <pattern name="theme_customization">/^theme_customization/</pattern>
+            <pattern name="tmp">/^tmp/</pattern>
             <pattern name="directories-with-dots">/^\./</pattern>
         </patterns>
     </blacklist>