FEATURE: add widget and widget area preview into Blade template

app/Providers/GlobalViewDataProvider.php

@@ -2,6 +2,7 @@
 
 namespace App\Providers;
 
+use Illuminate\Support\Facades\Blade;
 use Illuminate\Support\ServiceProvider;
 
 class GlobalViewDataProvider extends ServiceProvider
@@ -14,6 +15,44 @@ class GlobalViewDataProvider extends ServiceProvider
     public function boot()
     {
         view()->share('vendorName', 'ja s.r.o.');
+
+        // register extension for rendering widget areas
+        Blade::extend(function ($view) {
+            $pattern = $this->createPattern('widgetArea');
+
+            return preg_replace($pattern, '<?php \App\Helpers\WidgetAreas::render($2); ?>', $view);
+        });
+
+        // register extension for preview of widget
+        Blade::extend(function ($view) {
+            $pattern = $this->createPattern('widgetPreview');
+            $code = '
+            <?php
+            if ($2 instanceof \App\Models\Widget) {
+                $handler = $2->widget_type_handler;
+                $presenter = call_user_func([$handler, "getPresenter"]);
+
+                echo call_user_func([$presenter, "render"], json_decode($2->settings));
+            }
+            ?>
+        ';
+
+
+            return preg_replace($pattern, $code, $view);
+        });
+
+
+    }
+
+    /**
+     * Creates pattern for matching Blade directives
+     *
+     * @param $function
+     *
+     * @return string
+     */
+    private function createPattern($function){
+        return '/(?<!\w)(\s*)@'.$function.'\(\s*(.*)\)/';
     }
 
     /**