add plugin_assets() helper function

app/Services/Plugin.php

@@ -16,12 +16,19 @@ use Illuminate\Contracts\Support\Arrayable;
 class Plugin implements Arrayable, ArrayAccess
 {
     /**
-     * The directory of this plugin.
+     * The full directory of this plugin.
      *
      * @var string
      */
     protected $path;
 
+    /**
+     * The directory name where the plugin installed.
+     *
+     * @var string
+     */
+    protected $dirname;
+
     /**
      * package.json of the package.
      *
@@ -115,6 +122,18 @@ class Plugin implements Arrayable, ArrayAccess
         return $this->installed;
     }
 
+    public function getDirname()
+    {
+        return $this->dirname;
+    }
+
+    public function setDirname($dirname)
+    {
+        $this->dirname = $dirname;
+
+        return $this;
+    }
+
     public function getNameSpace()
     {
         return $this->namespace;

app/Services/PluginManager.php

@@ -85,6 +85,7 @@ class PluginManager
                 $plugin = new Plugin($this->getPluginsDir().'/'.$path, $package);
 
                 // Per default all plugins are installed if they are registered in composer.
+                $plugin->setDirname($path);
                 $plugin->setInstalled(true);
                 $plugin->setNameSpace(Arr::get($package, 'namespace'));
                 $plugin->setVersion(Arr::get($package, 'version'));

app/helpers.php

@@ -48,6 +48,18 @@ if (! function_exists('assets')) {
     }
 }
 
+if (! function_exists('plugin_assets')) {
+
+    function plugin_assets($id, $relative_uri)
+    {
+        if ($plugin = app('plugins')->getPlugin($id)) {
+            return url("plugins/{$plugin->getDirname()}/$relative_uri");
+        } else {
+            throw new InvalidArgumentException("No such plugin.");
+        }
+    }
+}
+
 if (! function_exists('json')) {
 
     function json()