feat: notification unsubscribe & email overhaul with HTML multipart (#3872)

extensions/subscriptions/locale/en.yml

@@ -51,21 +51,25 @@ flarum-subscriptions:
     # These translations are used in emails sent when a post is made in a subscribed discussion
     new_post:
       subject: "[New Post] {title}"
-      body: |
-        Hey {recipient_display_name}!
+      plain:
+        body: |
+          {poster_display_name} just posted in a discussion you're following: {title}.
 
-        {poster_display_name} made a post in a discussion you're following: {title}.
+          To view the new activity, check out the following link:
+          {url}
 
-        To view the new activity, check out the following link:
-        {url}
+          ---
 
-        ---
+          {content}
 
-        {content}
+          ---
 
-        ---
+          You won't receive any more notifications about this discussion until you're up-to-date.
+      html:
+        body: |
+          {poster_display_name} just posted in a discussion you're following: [{title}]({url}).
 
-        You won't receive any more notifications about this discussion until you're up-to-date.
+          You won't recieve any more notifications about this discussion until you're up-to-date.
 
   ##
   # REUSED TRANSLATIONS - These keys should not be used directly in code!

extensions/subscriptions/src/Notification/NewPostBlueprint.php

@@ -39,9 +39,11 @@ class NewPostBlueprint implements BlueprintInterface, MailableInterface
         return ['postNumber' => (int) $this->post->number];
     }
 
-    public function getEmailView(): string|array
+    public function getEmailViews(): array
     {
-        return ['text' => 'flarum-subscriptions::emails.newPost'];
+        return [
+            'text' => 'flarum-subscriptions::emails.plain.newPost',
+            'html' => 'flarum-subscriptions::emails.html.newPost', ];
     }
 
     public function getEmailSubject(TranslatorInterface $translator): string

extensions/subscriptions/views/emails/html/newPost.blade.php

@@ -0,0 +1,13 @@
+@extends('flarum.forum::email.html.notification.base')
+
+@section('notificationContent')
+{!! $formatter->convert($translator->trans('flarum-subscriptions.email.new_post.html.body', [
+'{poster_display_name}' => $blueprint->post->user->display_name,
+'{title}' => $blueprint->post->discussion->title,
+'{url}' => $url->to('forum')->route('discussion', ['id' => $blueprint->post->discussion_id, 'near' => $blueprint->post->number])
+])) !!}
+@endsection
+
+@section('contentPreview')
+    {!! $blueprint->post->formatContent() !!}
+@endsection

extensions/subscriptions/views/emails/plain/newPost.blade.php

@@ -1,7 +1,10 @@
-{!! $translator->trans('flarum-subscriptions.email.new_post.body', [
-'{recipient_display_name}' => $user->display_name,
+@extends('flarum.forum::email.plain.notification.base')
+
+@section('content')
+{!! $translator->trans('flarum-subscriptions.email.new_post.plain.body', [
 '{poster_display_name}' => $blueprint->post->user->display_name,
 '{title}' => $blueprint->post->discussion->title,
 '{url}' => $url->to('forum')->route('discussion', ['id' => $blueprint->post->discussion_id, 'near' => $blueprint->post->number]),
 '{content}' => $blueprint->post->content
 ]) !!}
+@endsection