feat: flarum 2.0 compatibility

Author: iamdarkle

.github/workflows/backend.yml

@@ -4,7 +4,7 @@ on: [workflow_dispatch, push, pull_request]
 
 jobs:
   run:
-    uses: flarum/framework/.github/workflows/REUSABLE_backend.yml@main
+    uses: flarum/framework/.github/workflows/REUSABLE_backend.yml@2.x
     with:
       enable_backend_testing: false
 

.github/workflows/frontend.yml

@@ -4,7 +4,7 @@ on: [workflow_dispatch, push, pull_request]
 
 jobs:
   run:
-    uses: flarum/framework/.github/workflows/REUSABLE_frontend.yml@main
+    uses: flarum/framework/.github/workflows/REUSABLE_frontend.yml@2.x
     with:
       enable_bundlewatch: false
       enable_prettier: true

extend.php

@@ -15,10 +15,7 @@
 use Flectar\Fancybox\WrapImagesInGallery;
 use Flectar\Fancybox\DefineGalleryTemplate;
 use Flectar\Fancybox\AddExcerptToDiscussion;
-use Flarum\Api\Context;
-use Flarum\Api\Endpoint;
-use Flarum\Api\Resource;
-use Flarum\Api\Schema;
+use Flarum\Discussion\Discussion;
 
 return [
     (new Extend\Frontend('forum'))
@@ -29,10 +26,9 @@
         ->configure(DefineGalleryTemplate::class)
         ->configure(AddExcerptToDiscussion::class)
         ->render(WrapImagesInGallery::class),
- 
-    // @TODO: Replace with the new implementation https://docs.flarum.org/2.x/extend/api#extending-api-resources
-    (new Extend\ApiSerializer(\Flarum\Api\Serializer\DiscussionSerializer::class))
-        ->attribute('excerpt', function ($serializer, $discussion) {
+
+    (new Extend\Model(Discussion::class))
+        ->attribute('excerpt', function (Discussion $discussion) {
             return $discussion->firstPost ? $discussion->firstPost->formatContent() : null;
         }),
 ];