Closes #700 - Subscribers can now be turned on and off

app/Composers/AppComposer.php

@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of Cachet.
+ *
+ * (c) Cachet HQ <support@cachethq.io>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CachetHQ\Cachet\Composers;
+
+use CachetHQ\Cachet\Facades\Setting;
+use Illuminate\Contracts\View\View;
+
+class AppComposer
+{
+    /**
+     * Index page view composer.
+     *
+     * @param \Illuminate\Contracts\View\View $view
+     */
+    public function compose(View $view)
+    {
+        $isEnabled = (bool) Setting::get('enable_subscribers', false);
+        $mailAddress = env('MAIL_ADDRESS', false);
+        $mailFrom = env('MAIL_NAME', false);
+
+        $withData = [
+            'subscribersEnabled' => $isEnabled && $mailAddress && $mailFrom,
+        ];
+
+        $view->with($withData);
+    }
+}