391 Notification refactorings (#441)

* Refactor notifications to allow easier plugins

* Notification refactoring

* Formatting

* Move news to NewsService; cleanup of events

* More refactoring; added send email out for news item and the template

* Formatting

* Formatting

app/Notifications/Messages/NewsAdded.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Notifications\Messages;
+
+use App\Models\News;
+use App\Notifications\BaseNotification;
+use App\Notifications\Channels\MailChannel;
+
+class NewsAdded extends BaseNotification
+{
+    use MailChannel;
+
+    private $news;
+
+    public function __construct(News $news)
+    {
+        parent::__construct();
+
+        $this->news = $news;
+        $this->setMailable(
+            $news->subject,
+            'notifications.mail.news',
+            ['news' => $news]
+        );
+    }
+
+    /**
+     * Get the array representation of the notification.
+     *
+     * @param mixed $notifiable
+     *
+     * @return array
+     */
+    public function toArray($notifiable)
+    {
+        return [
+            'news_id' => $this->news->id,
+        ];
+    }
+}