refactor: merge markdown environment configuration instead of replace (…

…#489)

composer.json

@@ -125,4 +125,4 @@
         "spatie/laravel-permission": "Needed for nova permissions & roles",
         "vyuldashev/nova-permission": "Needed for nova permissions & roles"
     }
-}
+}

config/markdown.php

@@ -10,7 +10,6 @@
 use League\CommonMark\Extension\SmartPunct\SmartPunctExtension;
 use League\CommonMark\Extension\Strikethrough\StrikethroughExtension;
 use League\CommonMark\Extension\TaskList\TaskListExtension;
-use League\CommonMark\Normalizer\SlugNormalizer;
 
 /*
  * This file is part of Laravel Markdown.
@@ -206,32 +205,11 @@
 
     /*
     |--------------------------------------------------------------------------
-    | Default Config
+    | Environment Configuration
     |--------------------------------------------------------------------------
     |
-    | This option specifies the maximum permitted block nesting level.
-    |
+    | The options below are going to be deep merged with the default options
+    | defined on the `src/Providers/CommonMarkServiceProvider.php` file.
     */
-
-    'environment' => [
-        'external_link' => [
-            'internal_hosts'     => config('app.url'),
-            'open_in_new_window' => true,
-            'html_class'         => 'external-link',
-            'nofollow'           => '',
-            'noopener'           => 'external',
-            'noreferrer'         => 'external',
-            'infix'              => ' ',
-        ],
-        'heading_permalink' => [
-            'html_class'      => 'heading-permalink',
-            'id_prefix'       => 'user-content',
-            'insert'          => 'before',
-            'title'           => 'Permalink',
-            'symbol'          => '#',
-        ],
-        'slug_normalizer' => [
-            'instance' => new SlugNormalizer(),
-        ],
-    ],
+    'environment' => [],
 ];

src/Providers/CommonMarkServiceProvider.php

@@ -212,7 +212,20 @@ private function registerCommonMarkEnvironment(): void
             $environment->addExtension(resolve($extension));
         }
 
-        $environment->mergeConfig(config('markdown.environment', [
+        $environment->mergeConfig($this->getConfiguration());
+    }
+
+    private function getConfiguration(): array
+    {
+        return array_replace_recursive(
+            $this->getDefaultConfiguration(),
+            Config::get('markdown.environment', [])
+        );
+    }
+
+    private function getDefaultConfiguration(): array
+    {
+        return [
             'external_link' => [
                 'internal_hosts'     => config('app.url'),
                 'open_in_new_window' => true,
@@ -232,6 +245,6 @@ private function registerCommonMarkEnvironment(): void
             'slug_normalizer' => [
                 'instance' => new SlugNormalizer(),
             ],
-        ]));
+        ];
     }
 }