Added a response macro

src/Response/MacroServiceProvider.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace HnhDigital\HelperCollection\Response;
+
+use Illuminate\Support\Facades\Response;
+use Illuminate\Support\ServiceProvider;
+
+class MacroServiceProvider extends ServiceProvider
+{
+    /**
+     * Register the application's response macros.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        // Providesd the ability to download a file from a given path.
+        // Will also return a not modified header if file has not changed.
+        Response::macro('downloadAndCache', function ($file_path) {
+            if (!empty(request()->header('If-Modified-Since'))) {
+                $cache_last_modified = strtotime(request()->header('If-Modified-Since'));
+                $file_last_modified = filemtime($file_path);
+                if ($file_last_modified == $cache_last_modified) {
+                    header('HTTP/1.1 304 Not Modified');
+                    exit();
+                }
+            }
+
+            return Response::file($file_path);
+        });
+    }
+}