+ component & twig function/filter for inject assets from manifest.json

classes/AssetsManifestException.php

@@ -0,0 +1,6 @@
+<?php namespace Wpstudio\AssetsManifest\Classes;
+
+class AssetsManifestException extends \ErrorException
+{
+
+}

classes/ManifestReader.php

@@ -4,12 +4,24 @@ class ManifestReader
 {
     private $manifest = null;
 
+    /**
+     * @param string $manifestPath
+     * @throws AssetsManifestException
+     */
     public function __construct(string $manifestPath)
     {
+        if (!file_exists($manifestPath)) {
+            throw new AssetsManifestException('Not found: ' . $manifestPath);
+        }
+
+        if (!is_readable($manifestPath)) {
+            throw new AssetsManifestException('Not readable: ' . $manifestPath);
+        }
+
         $this->manifest = json_decode(file_get_contents($manifestPath));
     }
 
-    public function get($assetName)
+    public function get(string $assetName)
     {
         return $this->manifest->$assetName;
     }

classes/TwigFilters.php

@@ -0,0 +1,15 @@
+<?php namespace Wpstudio\AssetsManifest\Classes;
+
+use Wpstudio\Assetsmanifest\Components\Manifest;
+
+class TwigFilters
+{
+    public static function manifest($assetName): string
+    {
+        $manifest = app()->get(Manifest::class);
+
+        assert($manifest instanceof Manifest);
+
+        return $manifest->getManifestReader()->get($assetName);
+    }
+}