Proxy: Add method for generate proxy URL.

Author: janbarasek

src/Proxy/Proxy.php

@@ -9,6 +9,7 @@
 use Baraja\Cms\Context;
 use Baraja\Cms\Helpers;
 use Baraja\Plugin\Plugin;
+use Baraja\Url\Url;
 
 /**
  * Smart proxy service for render all plugin components to single javascript.
@@ -36,6 +37,23 @@ public function __construct(
 	}
 
 
+	public static function getUrl(string $file): string
+	{
+		if (str_contains($file, '..')) {
+			throw new \LogicException('File path "' . $file . '" is not safe.');
+		}
+		$diskPath = __DIR__ . '/../../template/assets/' . $file;
+		if (is_file($diskPath) === false) {
+			throw new \InvalidArgumentException(
+				'Static file "' . $file . '" does not exist. '
+				. 'Path "' . $diskPath . '" given.',
+			);
+		}
+
+		return Url::get()->getBaseUrl() . '/admin/assets/' . $file;
+	}
+
+
 	/**
 	 * Render dynamic Vue components to requested file.
 	 */