feat: slack notifications

app/Notifications/Channels/SendsSlack.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace App\Notifications\Channels;
+
+interface SendsSlack
+{
+    public function routeNotificationForSlack();
+}

app/Notifications/Channels/SlackChannel.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Notifications\Channels;
+
+use App\Jobs\SendMessageToSlackJob;
+use Illuminate\Notifications\Notification;
+
+class SlackChannel
+{
+    /**
+     * Send the given notification.
+     */
+    public function send(SendsSlack $notifiable, Notification $notification): void
+    {
+        $message = $notification->toSlack();
+        $webhookUrl = $notifiable->routeNotificationForSlack();
+        if (!$webhookUrl) {
+            return;
+        }
+        dispatch(new SendMessageToSlackJob($message, $webhookUrl))->onQueue('high');
+    }
+}