chore: update codebase to php8.1 (#3827)

* chore: set minimum php version to 8.1

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* chore: update codebase to php8.1

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* Apply fixes from StyleCI

* chore: update workflow php version

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: caught errors

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: more caught errors

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: phpstan caught errors

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* Apply fixes from StyleCI

* fix: test-caught errors

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: test-caught errors

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: test-caught errors

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: introduce `Flarum\Locale\TranslatorInterface`

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* Apply fixes from StyleCI

* chore: remove mixin

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: test-caught errors

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: one last error

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

---------

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>
Co-authored-by: StyleCI Bot <bot@styleci.io>

.github/workflows/REUSABLE_backend.yml

@@ -25,7 +25,7 @@ on:
         description: Versions of PHP to test with. Should be array of strings encoded as JSON array
         type: string
         required: false
-        default: '["7.3", "7.4", "8.0", "8.1", "8.2"]'
+        default: '["8.1", "8.2"]'
 
       php_extensions:
         description: PHP extensions to install.

composer.json

@@ -85,7 +85,7 @@
         "flarum/testing": "self.version"
     },
     "require": {
-        "php": ">=7.3",
+        "php": "^8.1",
         "ext-json": "*",
         "components/font-awesome": "^5.14.0",
         "composer/composer": "^2.0",

extensions/akismet/src/Listener/SubmitHam.php

@@ -14,17 +14,12 @@ use Flarum\Approval\Event\PostWasApproved;
 
 class SubmitHam
 {
-    /**
-     * @var Akismet
-     */
-    protected $akismet;
-
-    public function __construct(Akismet $akismet)
-    {
-        $this->akismet = $akismet;
+    public function __construct(
+        protected Akismet $akismet
+    ) {
     }
 
-    public function handle(PostWasApproved $event)
+    public function handle(PostWasApproved $event): void
     {
         if (! $this->akismet->isConfigured()) {
             return;

extensions/akismet/src/Listener/SubmitSpam.php

@@ -14,17 +14,12 @@ use Flarum\Post\Event\Hidden;
 
 class SubmitSpam
 {
-    /**
-     * @var Akismet
-     */
-    protected $akismet;
-
-    public function __construct(Akismet $akismet)
-    {
-        $this->akismet = $akismet;
+    public function __construct(
+        protected Akismet $akismet
+    ) {
     }
 
-    public function handle(Hidden $event)
+    public function handle(Hidden $event): void
     {
         if (! $this->akismet->isConfigured()) {
             return;

extensions/akismet/src/Listener/ValidatePost.php

@@ -18,22 +18,13 @@ use Flarum\Settings\SettingsRepositoryInterface;
 
 class ValidatePost
 {
-    /**
-     * @var Akismet
-     */
-    protected $akismet;
-    /**
-     * @var SettingsRepositoryInterface
-     */
-    private $settings;
-
-    public function __construct(Akismet $akismet, SettingsRepositoryInterface $settings)
-    {
-        $this->akismet = $akismet;
-        $this->settings = $settings;
+    public function __construct(
+        protected Akismet $akismet,
+        protected SettingsRepositoryInterface $settings
+    ) {
     }
 
-    public function handle(Saving $event)
+    public function handle(Saving $event): void
     {
         if (! $this->akismet->isConfigured()) {
             return;

extensions/akismet/src/Provider/AkismetProvider.php

@@ -20,7 +20,7 @@ use Illuminate\Container\Container;
 
 class AkismetProvider extends AbstractServiceProvider
 {
-    public function register()
+    public function register(): void
     {
         $this->container->bind(Akismet::class, function (Container $container) {
             /** @var SettingsRepositoryInterface $settings */

extensions/approval/extend.php

@@ -37,7 +37,7 @@ return [
         ->cast('is_approved', 'bool'),
 
     (new Extend\ApiSerializer(BasicDiscussionSerializer::class))
-        ->attribute('isApproved', function ($serializer, Discussion $discussion) {
+        ->attribute('isApproved', function (BasicDiscussionSerializer $serializer, Discussion $discussion): bool {
             return $discussion->is_approved;
         }),
 
@@ -65,8 +65,8 @@ return [
         ->scope(Access\ScopePrivateDiscussionVisibility::class, 'viewPrivate'),
 
     (new Extend\ModelPrivate(Discussion::class))
-        ->checker([Listener\UnapproveNewContent::class, 'markUnapprovedContentAsPrivate']),
+        ->checker(Listener\UnapproveNewContent::markUnapprovedContentAsPrivate(...)),
 
     (new Extend\ModelPrivate(CommentPost::class))
-        ->checker([Listener\UnapproveNewContent::class, 'markUnapprovedContentAsPrivate']),
+        ->checker(Listener\UnapproveNewContent::markUnapprovedContentAsPrivate(...)),
 ];

extensions/approval/src/Access/ScopePrivateDiscussionVisibility.php

@@ -14,11 +14,7 @@ use Illuminate\Database\Eloquent\Builder;
 
 class ScopePrivateDiscussionVisibility
 {
-    /**
-     * @param Builder $query
-     * @param User $actor
-     */
-    public function __invoke(User $actor, Builder $query)
+    public function __invoke(User $actor, Builder $query): void
     {
         // All statements need to be wrapped in an orWhere, since we're adding a
         // subset of private discussions that should be visible, not restricting the visible

extensions/approval/src/Access/ScopePrivatePostVisibility.php

@@ -16,11 +16,7 @@ use Illuminate\Database\Eloquent\Builder;
 
 class ScopePrivatePostVisibility
 {
-    /**
-     * @param Builder $query
-     * @param User $actor
-     */
-    public function __invoke(User $actor, Builder $query)
+    public function __invoke(User $actor, Builder $query): void
     {
         // All statements need to be wrapped in an orWhere, since we're adding a
         // subset of private posts that should be visible, not restricting the visible

extensions/approval/src/Access/TagPolicy.php

@@ -15,10 +15,7 @@ use Flarum\User\User;
 
 class TagPolicy extends AbstractPolicy
 {
-    /**
-     * @return bool|null
-     */
-    public function addToDiscussion(User $actor, Tag $tag)
+    public function addToDiscussion(User $actor, Tag $tag): bool
     {
         return $actor->can('discussion.startWithoutApproval', $tag);
     }

extensions/approval/src/Event/PostWasApproved.php

@@ -14,25 +14,9 @@ use Flarum\User\User;
 
 class PostWasApproved
 {
-    /**
-     * The post that was approved.
-     *
-     * @var Post
-     */
-    public $post;
-
-    /**
-     * @var User
-     */
-    public $actor;
-
-    /**
-     * @param Post $post
-     * @param User $actor
-     */
-    public function __construct(Post $post, User $actor)
-    {
-        $this->post = $post;
-        $this->actor = $actor;
+    public function __construct(
+        public Post $post,
+        public User $actor
+    ) {
     }
 }

extensions/approval/src/Listener/ApproveContent.php

@@ -15,15 +15,12 @@ use Illuminate\Contracts\Events\Dispatcher;
 
 class ApproveContent
 {
-    /**
-     * @param Dispatcher $events
-     */
-    public function subscribe(Dispatcher $events)
+    public function subscribe(Dispatcher $events): void
     {
-        $events->listen(Saving::class, [$this, 'approvePost']);
+        $events->listen(Saving::class, $this->approvePost(...));
     }
 
-    public function approvePost(Saving $event)
+    public function approvePost(Saving $event): void
     {
         $attributes = $event->data['attributes'];
         $post = $event->post;

extensions/approval/src/Listener/UnapproveNewContent.php

@@ -18,18 +18,12 @@ use Illuminate\Contracts\Events\Dispatcher;
 
 class UnapproveNewContent
 {
-    /**
-     * @param Dispatcher $events
-     */
-    public function subscribe(Dispatcher $events)
+    public function subscribe(Dispatcher $events): void
     {
-        $events->listen(Saving::class, [$this, 'unapproveNewPosts']);
+        $events->listen(Saving::class, $this->unapproveNewPosts(...));
     }
 
-    /**
-     * @param Saving $event
-     */
-    public function unapproveNewPosts(Saving $event)
+    public function unapproveNewPosts(Saving $event): void
     {
         $post = $event->post;
 
@@ -63,14 +57,12 @@ class UnapproveNewContent
         }
     }
 
-    /**
-     * @param Discussion|CommentPost $instance
-     * @return bool|null
-     */
-    public static function markUnapprovedContentAsPrivate($instance)
+    public static function markUnapprovedContentAsPrivate(Discussion|CommentPost $instance): ?bool
     {
         if (! $instance->is_approved) {
             return true;
         }
+
+        return null;
     }
 }

extensions/approval/src/Listener/UpdateDiscussionAfterPostApproval.php

@@ -13,7 +13,7 @@ use Flarum\Approval\Event\PostWasApproved;
 
 class UpdateDiscussionAfterPostApproval
 {
-    public function handle(PostWasApproved $event)
+    public function handle(PostWasApproved $event): void
     {
         $post = $event->post;
         $discussion = $post->discussion;

extensions/bbcode/src/Configure.php

@@ -13,7 +13,7 @@ use s9e\TextFormatter\Configurator;
 
 class Configure
 {
-    public function __invoke(Configurator $config)
+    public function __invoke(Configurator $config): void
     {
         $this->addTagsFromRepositories($config);
         $this->adaptHighlightJs($config);

extensions/bbcode/src/Render.php

@@ -9,19 +9,14 @@
 
 namespace Flarum\BBCode;
 
+use Flarum\Locale\TranslatorInterface;
 use s9e\TextFormatter\Renderer;
-use Symfony\Contracts\Translation\TranslatorInterface;
 
 class Render
 {
-    /**
-     * @var TranslatorInterface
-     */
-    protected $translator;
-
-    public function __construct(TranslatorInterface $translator)
-    {
-        $this->translator = $translator;
+    public function __construct(
+        protected TranslatorInterface $translator
+    ) {
     }
 
     public function __invoke(Renderer $renderer, $context, string $xml): string

extensions/flags/src/Access/ScopeFlagVisibility.php

@@ -16,17 +16,12 @@ use Illuminate\Database\Eloquent\Builder;
 
 class ScopeFlagVisibility
 {
-    /**
-     * @var ExtensionManager
-     */
-    protected $extensions;
-
-    public function __construct(ExtensionManager $extensions)
-    {
-        $this->extensions = $extensions;
+    public function __construct(
+        protected ExtensionManager $extensions
+    ) {
     }
 
-    public function __invoke(User $actor, Builder $query)
+    public function __invoke(User $actor, Builder $query): void
     {
         if ($this->extensions->isEnabled('flarum-tags')) {
             $query

extensions/flags/src/AddCanFlagAttribute.php

@@ -16,20 +16,12 @@ use Flarum\User\User;
 
 class AddCanFlagAttribute
 {
-    /**
-     * @var SettingsRepositoryInterface
-     */
-    protected $settings;
-
-    /**
-     * @param SettingsRepositoryInterface $settings
-     */
-    public function __construct(SettingsRepositoryInterface $settings)
-    {
-        $this->settings = $settings;
+    public function __construct(
+        protected SettingsRepositoryInterface $settings
+    ) {
     }
 
-    public function __invoke(PostSerializer $serializer, Post $post)
+    public function __invoke(PostSerializer $serializer, Post $post): bool
     {
         return $serializer->getActor()->can('flag', $post) && $this->checkFlagOwnPostSetting($serializer->getActor(), $post);
     }

extensions/flags/src/AddFlagsApiAttributes.php

@@ -15,20 +15,12 @@ use Flarum\User\User;
 
 class AddFlagsApiAttributes
 {
-    /**
-     * @var SettingsRepositoryInterface
-     */
-    protected $settings;
-
-    /**
-     * @param SettingsRepositoryInterface $settings
-     */
-    public function __construct(SettingsRepositoryInterface $settings)
-    {
-        $this->settings = $settings;
+    public function __construct(
+        protected SettingsRepositoryInterface $settings
+    ) {
     }
 
-    public function __invoke(ForumSerializer $serializer)
+    public function __invoke(ForumSerializer $serializer): array
     {
         $attributes = [
             'canViewFlags' => $serializer->getActor()->hasPermissionLike('discussion.viewFlags')
@@ -41,11 +33,7 @@ class AddFlagsApiAttributes
         return $attributes;
     }
 
-    /**
-     * @param User $actor
-     * @return int
-     */
-    protected function getFlagCount(User $actor)
+    protected function getFlagCount(User $actor): int
     {
         return Flag::whereVisibleTo($actor)->distinct()->count('flags.post_id');
     }

extensions/flags/src/AddNewFlagCountAttribute.php

@@ -14,16 +14,12 @@ use Flarum\User\User;
 
 class AddNewFlagCountAttribute
 {
-    public function __invoke(CurrentUserSerializer $serializer, User $user)
+    public function __invoke(CurrentUserSerializer $serializer, User $user): int
     {
-        return (int) $this->getNewFlagCount($user);
+        return $this->getNewFlagCount($user);
     }
 
-    /**
-     * @param User $actor
-     * @return int
-     */
-    protected function getNewFlagCount(User $actor)
+    protected function getNewFlagCount(User $actor): int
     {
         $query = Flag::whereVisibleTo($actor);
 

extensions/flags/src/Api/Controller/CreateFlagController.php

@@ -12,6 +12,7 @@ namespace Flarum\Flags\Api\Controller;
 use Flarum\Api\Controller\AbstractCreateController;
 use Flarum\Flags\Api\Serializer\FlagSerializer;
 use Flarum\Flags\Command\CreateFlag;
+use Flarum\Flags\Flag;
 use Flarum\Http\RequestUtil;
 use Illuminate\Contracts\Bus\Dispatcher;
 use Illuminate\Support\Arr;
@@ -20,37 +21,20 @@ use Tobscure\JsonApi\Document;
 
 class CreateFlagController extends AbstractCreateController
 {
-    /**
-     * {@inheritdoc}
-     */
-    public $serializer = FlagSerializer::class;
+    public ?string $serializer = FlagSerializer::class;
 
-    /**
-     * {@inheritdoc}
-     */
-    public $include = [
+    public array $include = [
         'post',
         'post.flags',
         'user'
     ];
 
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    /**
-     * @param Dispatcher $bus
-     */
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function data(ServerRequestInterface $request, Document $document)
+    protected function data(ServerRequestInterface $request, Document $document): Flag
     {
         return $this->bus->dispatch(
             new CreateFlag(RequestUtil::getActor($request), Arr::get($request->getParsedBody(), 'data', []))

extensions/flags/src/Api/Controller/DeleteFlagsController.php

@@ -18,23 +18,12 @@ use Psr\Http\Message\ServerRequestInterface;
 
 class DeleteFlagsController extends AbstractDeleteController
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    /**
-     * @param Dispatcher $bus
-     */
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function delete(ServerRequestInterface $request)
+    protected function delete(ServerRequestInterface $request): void
     {
         $this->bus->dispatch(
             new DeleteFlags(Arr::get($request->getQueryParams(), 'id'), RequestUtil::getActor($request), $request->getParsedBody())

extensions/flags/src/Api/Controller/ListFlagsController.php

@@ -19,25 +19,16 @@ use Tobscure\JsonApi\Document;
 
 class ListFlagsController extends AbstractListController
 {
-    /**
-     * {@inheritdoc}
-     */
-    public $serializer = FlagSerializer::class;
+    public ?string $serializer = FlagSerializer::class;
 
-    /**
-     * {@inheritdoc}
-     */
-    public $include = [
+    public array $include = [
         'user',
         'post',
         'post.user',
         'post.discussion'
     ];
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function data(ServerRequestInterface $request, Document $document)
+    protected function data(ServerRequestInterface $request, Document $document): iterable
     {
         $actor = RequestUtil::getActor($request);
         $include = $this->extractInclude($request);

extensions/flags/src/Api/Serializer/FlagSerializer.php

@@ -14,42 +14,34 @@ use Flarum\Api\Serializer\BasicUserSerializer;
 use Flarum\Api\Serializer\PostSerializer;
 use Flarum\Flags\Flag;
 use InvalidArgumentException;
+use Tobscure\JsonApi\Relationship;
 
 class FlagSerializer extends AbstractSerializer
 {
-    /**
-     * {@inheritdoc}
-     */
     protected $type = 'flags';
 
-    protected function getDefaultAttributes($flag)
+    protected function getDefaultAttributes(object|array $model): array
     {
-        if (! ($flag instanceof Flag)) {
+        if (! ($model instanceof Flag)) {
             throw new InvalidArgumentException(
                 get_class($this).' can only serialize instances of '.Flag::class
             );
         }
 
         return [
-            'type'         => $flag->type,
-            'reason'       => $flag->reason,
-            'reasonDetail' => $flag->reason_detail,
-            'createdAt'    => $this->formatDate($flag->created_at),
+            'type'         => $model->type,
+            'reason'       => $model->reason,
+            'reasonDetail' => $model->reason_detail,
+            'createdAt'    => $this->formatDate($model->created_at),
         ];
     }
 
-    /**
-     * @return \Tobscure\JsonApi\Relationship
-     */
-    protected function post($flag)
+    protected function post(Flag $flag): ?Relationship
     {
         return $this->hasOne($flag, PostSerializer::class);
     }
 
-    /**
-     * @return \Tobscure\JsonApi\Relationship
-     */
-    protected function user($flag)
+    protected function user(Flag $flag): ?Relationship
     {
         return $this->hasOne($flag, BasicUserSerializer::class);
     }

extensions/flags/src/Command/CreateFlag.php

@@ -13,27 +13,9 @@ use Flarum\User\User;
 
 class CreateFlag
 {
-    /**
-     * The user performing the action.
-     *
-     * @var User
-     */
-    public $actor;
-
-    /**
-     * The attributes of the new flag.
-     *
-     * @var array
-     */
-    public $data;
-
-    /**
-     * @param User $actor The user performing the action.
-     * @param array $data The attributes of the new flag.
-     */
-    public function __construct(User $actor, array $data)
-    {
-        $this->actor = $actor;
-        $this->data = $data;
+    public function __construct(
+        public User $actor,
+        public array $data
+    ) {
     }
 }

extensions/flags/src/Command/CreateFlagHandler.php

@@ -13,58 +13,26 @@ use Carbon\Carbon;
 use Flarum\Flags\Event\Created;
 use Flarum\Flags\Flag;
 use Flarum\Foundation\ValidationException;
+use Flarum\Locale\TranslatorInterface;
 use Flarum\Post\CommentPost;
 use Flarum\Post\PostRepository;
 use Flarum\Settings\SettingsRepositoryInterface;
 use Flarum\User\Exception\PermissionDeniedException;
 use Illuminate\Events\Dispatcher;
 use Illuminate\Support\Arr;
-use Symfony\Contracts\Translation\TranslatorInterface;
 use Tobscure\JsonApi\Exception\InvalidParameterException;
 
 class CreateFlagHandler
 {
-    /**
-     * @var PostRepository
-     */
-    protected $posts;
-
-    /**
-     * @var TranslatorInterface
-     */
-    protected $translator;
-
-    /**
-     * @var SettingsRepositoryInterface
-     */
-    protected $settings;
-
-    /**
-     * @var Dispatcher
-     */
-    protected $events;
-
-    /**
-     * @param PostRepository $posts
-     * @param TranslatorInterface $translator
-     * @param SettingsRepositoryInterface $settings
-     * @param Dispatcher $events
-     */
-    public function __construct(PostRepository $posts, TranslatorInterface $translator, SettingsRepositoryInterface $settings, Dispatcher $events)
-    {
-        $this->posts = $posts;
-        $this->translator = $translator;
-        $this->settings = $settings;
-        $this->events = $events;
+    public function __construct(
+        protected PostRepository $posts,
+        protected TranslatorInterface $translator,
+        protected SettingsRepositoryInterface $settings,
+        protected Dispatcher $events
+    ) {
     }
 
-    /**
-     * @param CreateFlag $command
-     * @return Flag
-     * @throws InvalidParameterException
-     * @throws ValidationException
-     */
-    public function handle(CreateFlag $command)
+    public function handle(CreateFlag $command): Flag
     {
         $actor = $command->actor;
         $data = $command->data;

extensions/flags/src/Command/DeleteFlags.php

@@ -13,34 +13,10 @@ use Flarum\User\User;
 
 class DeleteFlags
 {
-    /**
-     * The ID of the post to delete flags for.
-     *
-     * @var int
-     */
-    public $postId;
-
-    /**
-     * The user performing the action.
-     *
-     * @var User
-     */
-    public $actor;
-
-    /**
-     * @var array
-     */
-    public $data;
-
-    /**
-     * @param int $postId The ID of the post to delete flags for.
-     * @param User $actor The user performing the action.
-     * @param array $data
-     */
-    public function __construct($postId, User $actor, array $data = [])
-    {
-        $this->postId = $postId;
-        $this->actor = $actor;
-        $this->data = $data;
+    public function __construct(
+        public int $postId,
+        public User $actor,
+        public array $data = []
+    ) {
     }
 }

extensions/flags/src/Command/DeleteFlagsHandler.php

@@ -17,31 +17,13 @@ use Illuminate\Events\Dispatcher;
 
 class DeleteFlagsHandler
 {
-    /**
-     * @var PostRepository
-     */
-    protected $posts;
-
-    /**
-     * @var Dispatcher
-     */
-    protected $events;
-
-    /**
-     * @param PostRepository $posts
-     * @param Dispatcher $events
-     */
-    public function __construct(PostRepository $posts, Dispatcher $events)
-    {
-        $this->posts = $posts;
-        $this->events = $events;
+    public function __construct(
+        protected PostRepository $posts,
+        protected Dispatcher $events
+    ) {
     }
 
-    /**
-     * @param DeleteFlags $command
-     * @return Post
-     */
-    public function handle(DeleteFlags $command)
+    public function handle(DeleteFlags $command): Post
     {
         $actor = $command->actor;
 

extensions/flags/src/Event/Created.php

@@ -14,30 +14,10 @@ use Flarum\User\User;
 
 class Created
 {
-    /**
-     * @var Flag
-     */
-    public $flag;
-
-    /**
-     * @var User
-     */
-    public $actor;
-
-    /**
-     * @var array
-     */
-    public $data;
-
-    /**
-     * @param Flag $flag
-     * @param User $actor
-     * @param array $data
-     */
-    public function __construct(Flag $flag, User $actor, array $data = [])
-    {
-        $this->flag = $flag;
-        $this->actor = $actor;
-        $this->data = $data;
+    public function __construct(
+        public Flag $flag,
+        public User $actor,
+        public array $data = []
+    ) {
     }
 }

extensions/flags/src/Event/Deleting.php

@@ -14,30 +14,10 @@ use Flarum\User\User;
 
 class Deleting
 {
-    /**
-     * @var Flag
-     */
-    public $flag;
-
-    /**
-     * @var User
-     */
-    public $actor;
-
-    /**
-     * @var array
-     */
-    public $data;
-
-    /**
-     * @param Flag $flag
-     * @param User $actor
-     * @param array $data
-     */
-    public function __construct(Flag $flag, User $actor, array $data = [])
-    {
-        $this->flag = $flag;
-        $this->actor = $actor;
-        $this->data = $data;
+    public function __construct(
+        public Flag $flag,
+        public User $actor,
+        public array $data = []
+    ) {
     }
 }

extensions/flags/src/Event/FlagsWillBeDeleted.php

@@ -18,30 +18,10 @@ use Flarum\User\User;
  */
 class FlagsWillBeDeleted
 {
-    /**
-     * @var Post
-     */
-    public $post;
-
-    /**
-     * @var User
-     */
-    public $actor;
-
-    /**
-     * @var array
-     */
-    public $data;
-
-    /**
-     * @param Post $post
-     * @param User $actor
-     * @param array $data
-     */
-    public function __construct(Post $post, User $actor, array $data = [])
-    {
-        $this->post = $post;
-        $this->actor = $actor;
-        $this->data = $data;
+    public function __construct(
+        public Post $post,
+        public User $actor,
+        public array $data = []
+    ) {
     }
 }

extensions/flags/src/Flag.php

@@ -14,6 +14,7 @@ use Flarum\Database\AbstractModel;
 use Flarum\Database\ScopeVisibilityTrait;
 use Flarum\Post\Post;
 use Flarum\User\User;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 /**
  * @property int $post_id
@@ -30,23 +31,14 @@ class Flag extends AbstractModel
 {
     use ScopeVisibilityTrait;
 
-    /**
-     * {@inheritdoc}
-     */
     protected $dates = ['created_at'];
 
-    /**
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function post()
+    public function post(): BelongsTo
     {
         return $this->belongsTo(Post::class);
     }
 
-    /**
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function user()
+    public function user(): BelongsTo
     {
         return $this->belongsTo(User::class);
     }

extensions/flags/src/Listener/DeleteFlags.php

@@ -13,10 +13,7 @@ use Flarum\Post\Event\Deleted;
 
 class DeleteFlags
 {
-    /**
-     * @param Deleted $event
-     */
-    public function handle(Deleted $event)
+    public function handle(Deleted $event): void
     {
         $event->post->flags()->delete();
     }

extensions/flags/src/PrepareFlagsApiData.php

@@ -17,7 +17,7 @@ use Psr\Http\Message\ServerRequestInterface;
 
 class PrepareFlagsApiData
 {
-    public function __invoke(Controller\AbstractSerializeController $controller, $data, ServerRequestInterface $request)
+    public function __invoke(Controller\AbstractSerializeController $controller, mixed $data, ServerRequestInterface $request): void
     {
         // For any API action that allows the 'flags' relationship to be
         // included, we need to preload this relationship onto the data (Post

extensions/likes/extend.php

@@ -51,25 +51,25 @@ return [
 
     (new Extend\ApiController(Controller\ShowDiscussionController::class))
         ->addInclude('posts.likes')
-        ->loadWhere('posts.likes', [LoadLikesRelationship::class, 'mutateRelation'])
-        ->prepareDataForSerialization([LoadLikesRelationship::class, 'countRelation']),
+        ->loadWhere('posts.likes', LoadLikesRelationship::mutateRelation(...))
+        ->prepareDataForSerialization(LoadLikesRelationship::countRelation(...)),
 
     (new Extend\ApiController(Controller\ListPostsController::class))
         ->addInclude('likes')
-        ->loadWhere('likes', [LoadLikesRelationship::class, 'mutateRelation'])
-        ->prepareDataForSerialization([LoadLikesRelationship::class, 'countRelation']),
+        ->loadWhere('likes', LoadLikesRelationship::mutateRelation(...))
+        ->prepareDataForSerialization(LoadLikesRelationship::countRelation(...)),
     (new Extend\ApiController(Controller\ShowPostController::class))
         ->addInclude('likes')
-        ->loadWhere('likes', [LoadLikesRelationship::class, 'mutateRelation'])
-        ->prepareDataForSerialization([LoadLikesRelationship::class, 'countRelation']),
+        ->loadWhere('likes', LoadLikesRelationship::mutateRelation(...))
+        ->prepareDataForSerialization(LoadLikesRelationship::countRelation(...)),
     (new Extend\ApiController(Controller\CreatePostController::class))
         ->addInclude('likes')
-        ->loadWhere('likes', [LoadLikesRelationship::class, 'mutateRelation'])
-        ->prepareDataForSerialization([LoadLikesRelationship::class, 'countRelation']),
+        ->loadWhere('likes', LoadLikesRelationship::mutateRelation(...))
+        ->prepareDataForSerialization(LoadLikesRelationship::countRelation(...)),
     (new Extend\ApiController(Controller\UpdatePostController::class))
         ->addInclude('likes')
-        ->loadWhere('likes', [LoadLikesRelationship::class, 'mutateRelation'])
-        ->prepareDataForSerialization([LoadLikesRelationship::class, 'countRelation']),
+        ->loadWhere('likes', LoadLikesRelationship::mutateRelation(...))
+        ->prepareDataForSerialization(LoadLikesRelationship::countRelation(...)),
 
     (new Extend\Event())
         ->listen(PostWasLiked::class, Listener\SendNotificationWhenPostIsLiked::class)

extensions/likes/src/Access/LikePostPolicy.php

@@ -16,14 +16,9 @@ use Flarum\User\User;
 
 class LikePostPolicy extends AbstractPolicy
 {
-    /**
-     * @var SettingsRepositoryInterface
-     */
-    protected $settings;
-
-    public function __construct(SettingsRepositoryInterface $settings)
-    {
-        $this->settings = $settings;
+    public function __construct(
+        protected SettingsRepositoryInterface $settings
+    ) {
     }
 
     public function like(User $actor, Post $post)

extensions/likes/src/Api/LoadLikesRelationship.php

@@ -9,6 +9,7 @@
 
 namespace Flarum\Likes\Api;
 
+use Flarum\Api\Controller\AbstractSerializeController;
 use Flarum\Discussion\Discussion;
 use Flarum\Http\RequestUtil;
 use Flarum\Post\Post;
@@ -19,15 +20,15 @@ use Psr\Http\Message\ServerRequestInterface;
 
 class LoadLikesRelationship
 {
-    public static $maxLikes = 4;
+    public static int $maxLikes = 4;
 
-    public static function mutateRelation(BelongsToMany $query, ServerRequestInterface $request): BelongsToMany
+    public static function mutateRelation(BelongsToMany $query, ServerRequestInterface $request): void
     {
         $actor = RequestUtil::getActor($request);
 
         $grammar = $query->getQuery()->getGrammar();
 
-        return $query
+        $query
             // So that we can tell if the current user has liked the post.
             ->orderBy(new Expression($grammar->wrap('user_id').' = '.$actor->id), 'desc')
             // Limiting a relationship results is only possible because
@@ -39,12 +40,14 @@ class LoadLikesRelationship
     /**
      * Called using the @see ApiController::prepareDataForSerialization extender.
      */
-    public static function countRelation($controller, $data): void
+    public static function countRelation(AbstractSerializeController $controller, mixed $data): array
     {
         $loadable = null;
 
         if ($data instanceof Discussion) {
-            $loadable = $data->newCollection($data->posts)->filter(function ($post) {
+            // We do this because the ShowDiscussionController manipulates the posts
+            // in a way that some of them are just ids.
+            $loadable = $data->posts->filter(function ($post) {
                 return $post instanceof Post;
             });
         } elseif ($data instanceof Collection) {
@@ -56,5 +59,7 @@ class LoadLikesRelationship
         if ($loadable) {
             $loadable->loadCount('likes');
         }
+
+        return [];
     }
 }

extensions/likes/src/Event/PostWasLiked.php

@@ -14,23 +14,9 @@ use Flarum\User\User;
 
 class PostWasLiked
 {
-    /**
-     * @var Post
-     */
-    public $post;
-
-    /**
-     * @var User
-     */
-    public $user;
-
-    /**
-     * @param Post $post
-     * @param User $user
-     */
-    public function __construct(Post $post, User $user)
-    {
-        $this->post = $post;
-        $this->user = $user;
+    public function __construct(
+        public Post $post,
+        public User $user
+    ) {
     }
 }

extensions/likes/src/Event/PostWasUnliked.php

@@ -14,23 +14,9 @@ use Flarum\User\User;
 
 class PostWasUnliked
 {
-    /**
-     * @var Post
-     */
-    public $post;
-
-    /**
-     * @var User
-     */
-    public $user;
-
-    /**
-     * @param Post $post
-     * @param User $user
-     */
-    public function __construct(Post $post, User $user)
-    {
-        $this->post = $post;
-        $this->user = $user;
+    public function __construct(
+        public Post $post,
+        public User $user
+    ) {
     }
 }

extensions/likes/src/Listener/SaveLikesToDatabase.php

@@ -17,19 +17,13 @@ use Illuminate\Contracts\Events\Dispatcher;
 
 class SaveLikesToDatabase
 {
-    /**
-     * @param Dispatcher $events
-     */
-    public function subscribe(Dispatcher $events)
+    public function subscribe(Dispatcher $events): void
     {
-        $events->listen(Saving::class, [$this, 'whenPostIsSaving']);
-        $events->listen(Deleted::class, [$this, 'whenPostIsDeleted']);
+        $events->listen(Saving::class, $this->whenPostIsSaving(...));
+        $events->listen(Deleted::class, $this->whenPostIsDeleted(...));
     }
 
-    /**
-     * @param Saving $event
-     */
-    public function whenPostIsSaving(Saving $event)
+    public function whenPostIsSaving(Saving $event): void
     {
         $post = $event->post;
         $data = $event->data;
@@ -54,10 +48,7 @@ class SaveLikesToDatabase
         }
     }
 
-    /**
-     * @param Deleted $event
-     */
-    public function whenPostIsDeleted(Deleted $event)
+    public function whenPostIsDeleted(Deleted $event): void
     {
         $event->post->likes()->detach();
     }

extensions/likes/src/Listener/SendNotificationWhenPostIsLiked.php

@@ -15,20 +15,12 @@ use Flarum\Notification\NotificationSyncer;
 
 class SendNotificationWhenPostIsLiked
 {
-    /**
-     * @var NotificationSyncer
-     */
-    protected $notifications;
-
-    /**
-     * @param NotificationSyncer $notifications
-     */
-    public function __construct(NotificationSyncer $notifications)
-    {
-        $this->notifications = $notifications;
+    public function __construct(
+        protected NotificationSyncer $notifications
+    ) {
     }
 
-    public function handle(PostWasLiked $event)
+    public function handle(PostWasLiked $event): void
     {
         if ($event->post->user && $event->post->user->id != $event->user->id) {
             $this->notifications->sync(

extensions/likes/src/Listener/SendNotificationWhenPostIsUnliked.php

@@ -15,20 +15,12 @@ use Flarum\Notification\NotificationSyncer;
 
 class SendNotificationWhenPostIsUnliked
 {
-    /**
-     * @var NotificationSyncer
-     */
-    protected $notifications;
-
-    /**
-     * @param NotificationSyncer $notifications
-     */
-    public function __construct(NotificationSyncer $notifications)
-    {
-        $this->notifications = $notifications;
+    public function __construct(
+        protected NotificationSyncer $notifications
+    ) {
     }
 
-    public function handle(PostWasUnliked $event)
+    public function handle(PostWasUnliked $event): void
     {
         if ($event->post->user && $event->post->user->id != $event->user->id) {
             $this->notifications->sync(

extensions/likes/src/Notification/PostLikedBlueprint.php

@@ -9,67 +9,40 @@
 
 namespace Flarum\Likes\Notification;
 
+use Flarum\Database\AbstractModel;
 use Flarum\Notification\Blueprint\BlueprintInterface;
 use Flarum\Post\Post;
 use Flarum\User\User;
 
 class PostLikedBlueprint implements BlueprintInterface
 {
-    /**
-     * @var Post
-     */
-    public $post;
-
-    /**
-     * @var User
-     */
-    public $user;
-
-    /**
-     * @param Post $post
-     * @param User $user
-     */
-    public function __construct(Post $post, User $user)
-    {
-        $this->post = $post;
-        $this->user = $user;
+    public function __construct(
+        public Post $post,
+        public User $user
+    ) {
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getSubject()
+    public function getSubject(): ?AbstractModel
     {
         return $this->post;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getFromUser()
+    public function getFromUser(): ?User
     {
         return $this->user;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getData()
+    public function getData(): mixed
     {
+        return null;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getType()
+    public static function getType(): string
     {
         return 'postLiked';
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getSubjectModel()
+    public static function getSubjectModel(): string
     {
         return Post::class;
     }

extensions/likes/src/Query/LikedByFilter.php

@@ -22,7 +22,7 @@ class LikedByFilter implements FilterInterface
         return 'likedBy';
     }
 
-    public function filter(FilterState $filterState, $filterValue, bool $negate)
+    public function filter(FilterState $filterState, string|array $filterValue, bool $negate): void
     {
         $likedId = $this->asInt($filterValue);
 

extensions/likes/src/Query/LikedFilter.php

@@ -11,17 +11,20 @@ namespace Flarum\Likes\Query;
 
 use Flarum\Filter\FilterInterface;
 use Flarum\Filter\FilterState;
+use Flarum\Filter\ValidateFilterTrait;
 
 class LikedFilter implements FilterInterface
 {
+    use ValidateFilterTrait;
+
     public function getFilterKey(): string
     {
         return 'liked';
     }
 
-    public function filter(FilterState $filterState, string $filterValue, bool $negate)
+    public function filter(FilterState $filterState, string|array $filterValue, bool $negate): void
     {
-        $likedId = trim($filterValue, '"');
+        $likedId = $this->asString($filterValue);
 
         $filterState
             ->getQuery()

extensions/lock/src/Access/DiscussionPolicy.php

@@ -15,11 +15,6 @@ use Flarum\User\User;
 
 class DiscussionPolicy extends AbstractPolicy
 {
-    /**
-     * @param User $actor
-     * @param Discussion $discussion
-     * @return string|void
-     */
     public function reply(User $actor, Discussion $discussion)
     {
         if ($discussion->is_locked && $actor->cannot('lock', $discussion)) {

extensions/lock/src/Event/DiscussionWasLocked.php

@@ -14,23 +14,9 @@ use Flarum\User\User;
 
 class DiscussionWasLocked
 {
-    /**
-     * @var Discussion
-     */
-    public $discussion;
-
-    /**
-     * @var User
-     */
-    public $user;
-
-    /**
-     * @param Discussion $discussion
-     * @param User $user
-     */
-    public function __construct(Discussion $discussion, User $user)
-    {
-        $this->discussion = $discussion;
-        $this->user = $user;
+    public function __construct(
+        public Discussion $discussion,
+        public User $user
+    ) {
     }
 }

extensions/lock/src/Event/DiscussionWasUnlocked.php

@@ -14,23 +14,9 @@ use Flarum\User\User;
 
 class DiscussionWasUnlocked
 {
-    /**
-     * @var Discussion
-     */
-    public $discussion;
-
-    /**
-     * @var User
-     */
-    public $user;
-
-    /**
-     * @param Discussion $discussion
-     * @param User $user
-     */
-    public function __construct(Discussion $discussion, User $user)
-    {
-        $this->discussion = $discussion;
-        $this->user = $user;
+    public function __construct(
+        public Discussion $discussion,
+        public User $user
+    ) {
     }
 }

extensions/lock/src/Listener/CreatePostWhenDiscussionIsLocked.php

@@ -16,17 +16,12 @@ use Flarum\Notification\NotificationSyncer;
 
 class CreatePostWhenDiscussionIsLocked
 {
-    /**
-     * @var NotificationSyncer
-     */
-    protected $notifications;
-
-    public function __construct(NotificationSyncer $notifications)
-    {
-        $this->notifications = $notifications;
+    public function __construct(
+        protected NotificationSyncer $notifications
+    ) {
     }
 
-    public function handle(DiscussionWasLocked $event)
+    public function handle(DiscussionWasLocked $event): void
     {
         $post = DiscussionLockedPost::reply(
             $event->discussion->id,

extensions/lock/src/Listener/CreatePostWhenDiscussionIsUnlocked.php

@@ -16,17 +16,12 @@ use Flarum\Notification\NotificationSyncer;
 
 class CreatePostWhenDiscussionIsUnlocked
 {
-    /**
-     * @var NotificationSyncer
-     */
-    protected $notifications;
-
-    public function __construct(NotificationSyncer $notifications)
-    {
-        $this->notifications = $notifications;
+    public function __construct(
+        protected NotificationSyncer $notifications
+    ) {
     }
 
-    public function handle(DiscussionWasUnlocked $event)
+    public function handle(DiscussionWasUnlocked $event): void
     {
         $post = DiscussionLockedPost::reply(
             $event->discussion->id,

extensions/lock/src/Listener/SaveLockedToDatabase.php

@@ -15,7 +15,7 @@ use Flarum\Lock\Event\DiscussionWasUnlocked;
 
 class SaveLockedToDatabase
 {
-    public function handle(Saving $event)
+    public function handle(Saving $event): void
     {
         if (isset($event->data['attributes']['isLocked'])) {
             $isLocked = (bool) $event->data['attributes']['isLocked'];

extensions/lock/src/Notification/DiscussionLockedBlueprint.php

@@ -9,61 +9,40 @@
 
 namespace Flarum\Lock\Notification;
 
+use Flarum\Database\AbstractModel;
 use Flarum\Discussion\Discussion;
 use Flarum\Lock\Post\DiscussionLockedPost;
 use Flarum\Notification\Blueprint\BlueprintInterface;
+use Flarum\User\User;
 
 class DiscussionLockedBlueprint implements BlueprintInterface
 {
-    /**
-     * @var DiscussionLockedPost
-     */
-    protected $post;
-
-    /**
-     * @param DiscussionLockedPost $post
-     */
-    public function __construct(DiscussionLockedPost $post)
-    {
-        $this->post = $post;
+    public function __construct(
+        protected DiscussionLockedPost $post
+    ) {
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getFromUser()
+    public function getFromUser(): ?User
     {
         return $this->post->user;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getSubject()
+    public function getSubject(): ?AbstractModel
     {
         return $this->post->discussion;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getData()
+    public function getData(): array
     {
         return ['postNumber' => (int) $this->post->number];
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getType()
+    public static function getType(): string
     {
         return 'discussionLocked';
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getSubjectModel()
+    public static function getSubjectModel(): string
     {
         return Discussion::class;
     }

extensions/lock/src/Post/DiscussionLockedPost.php

@@ -16,15 +16,9 @@ use Flarum\Post\Post;
 
 class DiscussionLockedPost extends AbstractEventPost implements MergeableInterface
 {
-    /**
-     * {@inheritdoc}
-     */
-    public static $type = 'discussionLocked';
+    public static string $type = 'discussionLocked';
 
-    /**
-     * {@inheritdoc}
-     */
-    public function saveAfter(Post $previous = null)
+    public function saveAfter(Post $previous = null): static
     {
         // If the previous post is another 'discussion locked' post, and it's
         // by the same user, then we can merge this post into it. If we find
@@ -47,15 +41,7 @@ class DiscussionLockedPost extends AbstractEventPost implements MergeableInterfa
         return $this;
     }
 
-    /**
-     * Create a new instance in reply to a discussion.
-     *
-     * @param int $discussionId
-     * @param int $userId
-     * @param bool $isLocked
-     * @return static
-     */
-    public static function reply($discussionId, $userId, $isLocked)
+    public static function reply(int $discussionId, int $userId, bool $isLocked): static
     {
         $post = new static;
 
@@ -67,14 +53,8 @@ class DiscussionLockedPost extends AbstractEventPost implements MergeableInterfa
         return $post;
     }
 
-    /**
-     * Build the content attribute.
-     *
-     * @param bool $isLocked Whether or not the discussion is locked.
-     * @return array
-     */
-    public static function buildContent($isLocked)
+    public static function buildContent(bool $isLocked): array
     {
-        return ['locked' => (bool) $isLocked];
+        return ['locked' => $isLocked];
     }
 }

extensions/lock/src/Query/LockedFilterGambit.php

@@ -17,14 +17,14 @@ use Illuminate\Database\Query\Builder;
 
 class LockedFilterGambit extends AbstractRegexGambit implements FilterInterface
 {
-    protected function getGambitPattern()
+    protected function getGambitPattern(): string
     {
         return 'is:locked';
     }
 
-    protected function conditions(SearchState $searchState, array $matches, $negate)
+    protected function conditions(SearchState $search, array $matches, bool $negate): void
     {
-        $this->constrain($searchState->getQuery(), $negate);
+        $this->constrain($search->getQuery(), $negate);
     }
 
     public function getFilterKey(): string
@@ -32,12 +32,12 @@ class LockedFilterGambit extends AbstractRegexGambit implements FilterInterface
         return 'locked';
     }
 
-    public function filter(FilterState $filterState, $filterValue, bool $negate)
+    public function filter(FilterState $filterState, string|array $filterValue, bool $negate): void
     {
         $this->constrain($filterState->getQuery(), $negate);
     }
 
-    protected function constrain(Builder $query, bool $negate)
+    protected function constrain(Builder $query, bool $negate): void
     {
         $query->where('is_locked', ! $negate);
     }

extensions/mentions/extend.php

@@ -80,8 +80,8 @@ return [
             'posts.mentionsUsers', 'posts.mentionsPosts', 'posts.mentionsPosts.user',
             'posts.mentionsGroups'
         ])
-        ->loadWhere('posts.mentionedBy', [LoadMentionedByRelationship::class, 'mutateRelation'])
-        ->prepareDataForSerialization([LoadMentionedByRelationship::class, 'countRelation']),
+        ->loadWhere('posts.mentionedBy', LoadMentionedByRelationship::mutateRelation(...))
+        ->prepareDataForSerialization(LoadMentionedByRelationship::countRelation(...)),
 
     (new Extend\ApiController(Controller\ListDiscussionsController::class))
         ->load([
@@ -93,14 +93,14 @@ return [
         ->addInclude(['mentionedBy', 'mentionedBy.user', 'mentionedBy.discussion'])
         // We wouldn't normally need to eager load on a single model,
         // but we do so here for visibility scoping.
-        ->loadWhere('mentionedBy', [LoadMentionedByRelationship::class, 'mutateRelation'])
-        ->prepareDataForSerialization([LoadMentionedByRelationship::class, 'countRelation']),
+        ->loadWhere('mentionedBy', LoadMentionedByRelationship::mutateRelation(...))
+        ->prepareDataForSerialization(LoadMentionedByRelationship::countRelation(...)),
 
     (new Extend\ApiController(Controller\ListPostsController::class))
         ->addInclude(['mentionedBy', 'mentionedBy.user', 'mentionedBy.discussion'])
         ->load(['mentionsUsers', 'mentionsPosts', 'mentionsPosts.user', 'mentionsGroups'])
-        ->loadWhere('mentionedBy', [LoadMentionedByRelationship::class, 'mutateRelation'])
-        ->prepareDataForSerialization([LoadMentionedByRelationship::class, 'countRelation']),
+        ->loadWhere('mentionedBy', LoadMentionedByRelationship::mutateRelation(...))
+        ->prepareDataForSerialization(LoadMentionedByRelationship::countRelation(...)),
 
     (new Extend\Settings)
         ->serializeToForum('allowUsernameMentionFormat', 'flarum-mentions.allow_username_format', 'boolval'),

extensions/mentions/src/Api/LoadMentionedByRelationship.php

@@ -9,6 +9,7 @@
 
 namespace Flarum\Mentions\Api;
 
+use Flarum\Api\Controller\AbstractSerializeController;
 use Flarum\Discussion\Discussion;
 use Flarum\Http\RequestUtil;
 use Flarum\Post\Post;
@@ -22,13 +23,13 @@ use Psr\Http\Message\ServerRequestInterface;
  */
 class LoadMentionedByRelationship
 {
-    public static $maxMentionedBy = 4;
+    public static int $maxMentionedBy = 4;
 
-    public static function mutateRelation(BelongsToMany $query, ServerRequestInterface $request)
+    public static function mutateRelation(BelongsToMany $query, ServerRequestInterface $request): void
     {
         $actor = RequestUtil::getActor($request);
 
-        return $query
+        $query
             ->with(['mentionsPosts', 'mentionsPosts.user', 'mentionsUsers'])
             ->whereVisibleTo($actor)
             ->oldest()
@@ -41,13 +42,15 @@ class LoadMentionedByRelationship
     /**
      * Called using the @see ApiController::prepareDataForSerialization extender.
      */
-    public static function countRelation($controller, $data, ServerRequestInterface $request): void
+    public static function countRelation(AbstractSerializeController $controller, mixed $data, ServerRequestInterface $request): array
     {
         $actor = RequestUtil::getActor($request);
         $loadable = null;
 
         if ($data instanceof Discussion) {
-            $loadable = $data->newCollection($data->posts)->filter(function ($post) {
+            // We do this because the ShowDiscussionController manipulates the posts
+            // in a way that some of them are just ids.
+            $loadable = $data->posts->filter(function ($post) {
                 return $post instanceof Post;
             });
         } elseif ($data instanceof Collection) {
@@ -63,5 +66,7 @@ class LoadMentionedByRelationship
                 }
             ]);
         }
+
+        return [];
     }
 }

extensions/mentions/src/ConfigureMentions.php

@@ -30,23 +30,13 @@ class ConfigureMentions
     public const GROUP_MENTION_WITH_NAME_REGEX = '/\B@["“](?<groupname>((?!"#[a-z]{0,3}[0-9]+).)+)["|”]#g(?<id>[0-9]+)\b/';
     public const TAG_MENTION_WITH_SLUG_REGEX = '/(?:[^“"]|^)\B#(?<slug>[-_\p{L}\p{N}\p{M}]+)\b/ui';
 
-    /**
-     * @var UrlGenerator
-     */
-    protected $url;
-
-    /**
-     * @var ExtensionManager
-     */
-    protected $extensions;
-
-    public function __construct(UrlGenerator $url, ExtensionManager $extensions)
-    {
-        $this->url = $url;
-        $this->extensions = $extensions;
+    public function __construct(
+        protected UrlGenerator $url,
+        protected ExtensionManager $extensions
+    ) {
     }
 
-    public function __invoke(Configurator $config)
+    public function __invoke(Configurator $config): void
     {
         $this->configureUserMentions($config);
         $this->configurePostMentions($config);

extensions/mentions/src/Filter/MentionedFilter.php

@@ -22,7 +22,7 @@ class MentionedFilter implements FilterInterface
         return 'mentioned';
     }
 
-    public function filter(FilterState $filterState, $filterValue, bool $negate)
+    public function filter(FilterState $filterState, string|array $filterValue, bool $negate): void
     {
         $mentionedId = $this->asInt($filterValue);
 

extensions/mentions/src/Filter/MentionedPostFilter.php

@@ -19,7 +19,7 @@ class MentionedPostFilter implements FilterInterface
         return 'mentionedPost';
     }
 
-    public function filter(FilterState $filterState, string $filterValue, bool $negate)
+    public function filter(FilterState $filterState, string|array $filterValue, bool $negate): void
     {
         $mentionedId = trim($filterValue, '"');
 

extensions/mentions/src/Formatter/EagerLoadMentionedModels.php

@@ -20,38 +20,15 @@ use s9e\TextFormatter\Parser;
 
 class EagerLoadMentionedModels
 {
-    /**
-     * @var ExtensionManager
-     */
-    protected $extensions;
-
-    /**
-     * @var PostRepository
-     */
-    protected $posts;
-
-    /**
-     * @var GroupRepository
-     */
-    protected $groups;
-
-    /**
-     * @var TagRepository
-     */
-    protected $tags;
-
-    public function __construct(ExtensionManager $extensions, PostRepository $posts, GroupRepository $groups, TagRepository $tags)
-    {
-        $this->extensions = $extensions;
-        $this->posts = $posts;
-        $this->groups = $groups;
-        $this->tags = $tags;
+    public function __construct(
+        protected ExtensionManager $extensions,
+        protected PostRepository $posts,
+        protected GroupRepository $groups,
+        protected TagRepository $tags
+    ) {
     }
 
-    /**
-     * @param mixed|\Flarum\Post\CommentPost|null $context
-     */
-    public function __invoke(Parser $parser, $context, string $text, ?User $actor): string
+    public function __invoke(Parser $parser, mixed $context, string $text, ?User $actor): string
     {
         $callables = $this->getEagerLoaders();
 

extensions/mentions/src/Formatter/FormatGroupMentions.php

@@ -10,32 +10,19 @@
 namespace Flarum\Mentions\Formatter;
 
 use Flarum\Group\Group;
+use Flarum\Locale\TranslatorInterface;
 use Flarum\Post\Post;
 use s9e\TextFormatter\Renderer;
 use s9e\TextFormatter\Utils;
-use Symfony\Contracts\Translation\TranslatorInterface;
 
 class FormatGroupMentions
 {
-    /**
-     * @var TranslatorInterface
-     */
-    private $translator;
-
-    public function __construct(TranslatorInterface $translator)
-    {
-        $this->translator = $translator;
+    public function __construct(
+        private readonly TranslatorInterface $translator
+    ) {
     }
 
-    /**
-     * Configure rendering for group mentions.
-     *
-     * @param \s9e\TextFormatter\Renderer $renderer
-     * @param mixed $context
-     * @param string $xml
-     * @return string
-     */
-    public function __invoke(Renderer $renderer, $context, string $xml): string
+    public function __invoke(Renderer $renderer, mixed $context, string $xml): string
     {
         return Utils::replaceAttributes($xml, 'GROUPMENTION', function ($attributes) use ($context) {
             $group = (($context && isset($context->getRelations()['mentionsGroups'])) || $context instanceof Post)

extensions/mentions/src/Formatter/FormatPostMentions.php

@@ -9,33 +9,19 @@
 
 namespace Flarum\Mentions\Formatter;
 
+use Flarum\Locale\TranslatorInterface;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use s9e\TextFormatter\Renderer;
 use s9e\TextFormatter\Utils;
-use Symfony\Contracts\Translation\TranslatorInterface;
 
 class FormatPostMentions
 {
-    /**
-     * @var TranslatorInterface
-     */
-    private $translator;
-
-    public function __construct(TranslatorInterface $translator)
-    {
-        $this->translator = $translator;
+    public function __construct(
+        private readonly TranslatorInterface $translator
+    ) {
     }
 
-    /**
-     * Configure rendering for post mentions.
-     *
-     * @param \s9e\TextFormatter\Renderer $renderer
-     * @param mixed $context
-     * @param string|null $xml
-     * @param \Psr\Http\Message\ServerRequestInterface $request
-     * @return string
-     */
-    public function __invoke(Renderer $renderer, $context, $xml, Request $request = null)
+    public function __invoke(Renderer $renderer, mixed $context, ?string $xml, Request $request = null): string
     {
         $post = $context;
 

extensions/mentions/src/Formatter/FormatTagMentions.php

@@ -17,7 +17,7 @@ use s9e\TextFormatter\Utils;
 
 class FormatTagMentions
 {
-    public function __invoke(Renderer $renderer, $context, ?string $xml, Request $request = null): string
+    public function __invoke(Renderer $renderer, mixed $context, ?string $xml, Request $request = null): string
     {
         return Utils::replaceAttributes($xml, 'TAGMENTION', function ($attributes) use ($context) {
             /** @var Tag|null $tag */

extensions/mentions/src/Formatter/FormatUserMentions.php

@@ -10,39 +10,21 @@
 namespace Flarum\Mentions\Formatter;
 
 use Flarum\Http\SlugManager;
+use Flarum\Locale\TranslatorInterface;
 use Flarum\Post\Post;
 use Flarum\User\User;
 use s9e\TextFormatter\Renderer;
 use s9e\TextFormatter\Utils;
-use Symfony\Contracts\Translation\TranslatorInterface;
 
 class FormatUserMentions
 {
-    /**
-     * @var SlugManager
-     */
-    private $slugManager;
-
-    /**
-     * @var TranslatorInterface
-     */
-    private $translator;
-
-    public function __construct(SlugManager $slugManager, TranslatorInterface $translator)
-    {
-        $this->slugManager = $slugManager;
-        $this->translator = $translator;
+    public function __construct(
+        private readonly TranslatorInterface $translator,
+        private readonly SlugManager $slugManager
+    ) {
     }
 
-    /**
-     * Configure rendering for user mentions.
-     *
-     * @param \s9e\TextFormatter\Renderer $renderer
-     * @param mixed $context
-     * @param string $xml
-     * @return string $xml to be rendered
-     */
-    public function __invoke(Renderer $renderer, $context, string $xml)
+    public function __invoke(Renderer $renderer, mixed $context, string $xml): string
     {
         return Utils::replaceAttributes($xml, 'USERMENTION', function ($attributes) use ($context) {
             $user = (($context && isset($context->getRelations()['mentionsUsers'])) || $context instanceof Post)

extensions/mentions/src/Formatter/UnparsePostMentions.php

@@ -9,42 +9,25 @@
 
 namespace Flarum\Mentions\Formatter;
 
+use Flarum\Locale\TranslatorInterface;
 use s9e\TextFormatter\Utils;
-use Symfony\Contracts\Translation\TranslatorInterface;
 
 class UnparsePostMentions
 {
-    /**
-     * @var TranslatorInterface
-     */
-    private $translator;
-
-    public function __construct(TranslatorInterface $translator)
-    {
-        $this->translator = $translator;
+    public function __construct(
+        private readonly TranslatorInterface $translator
+    ) {
     }
 
-    /**
-     * Configure rendering for user mentions.
-     *
-     * @param string $xml
-     * @param mixed $context
-     * @return string $xml to be unparsed
-     */
-    public function __invoke($context, string $xml)
+    public function __invoke(mixed $context, string $xml): string
     {
-        $xml = $this->updatePostMentionTags($context, $xml);
-        $xml = $this->unparsePostMentionTags($xml);
-
-        return $xml;
+        return $this->unparsePostMentionTags(
+            $this->updatePostMentionTags($context, $xml)
+        );
     }
 
     /**
      * Updates XML post mention tags before unparsing so that unparsing uses new display names.
-     *
-     * @param mixed $context
-     * @param string $xml : Parsed text.
-     * @return string $xml : Updated XML tags;
      */
     protected function updatePostMentionTags($context, string $xml): string
     {
@@ -74,9 +57,6 @@ class UnparsePostMentions
 
     /**
      * Transforms post mention tags from XML to raw unparsed content with updated format and display name.
-     *
-     * @param string $xml : Parsed text.
-     * @return string : Unparsed text.
      */
     protected function unparsePostMentionTags(string $xml): string
     {

extensions/mentions/src/Formatter/UnparseTagMentions.php

@@ -15,29 +15,17 @@ use s9e\TextFormatter\Utils;
 
 class UnparseTagMentions
 {
-    /**
-     * Configure rendering for user mentions.
-     *
-     * @param string $xml
-     * @param mixed $context
-     * @return string $xml to be unparsed
-     */
-    public function __invoke($context, string $xml)
+    public function __invoke(mixed $context, string $xml): string
     {
-        $xml = $this->updateTagMentionTags($context, $xml);
-        $xml = $this->unparseTagMentionTags($xml);
-
-        return $xml;
+        return $this->unparseTagMentionTags(
+            $this->updateTagMentionTags($context, $xml)
+        );
     }
 
     /**
      * Updates XML user mention tags before unparsing so that unparsing uses new tag names.
-     *
-     * @param mixed $context
-     * @param string $xml : Parsed text.
-     * @return string $xml : Updated XML tags;
      */
-    protected function updateTagMentionTags($context, string $xml): string
+    protected function updateTagMentionTags(mixed $context, string $xml): string
     {
         return Utils::replaceAttributes($xml, 'TAGMENTION', function (array $attributes) use ($context) {
             /** @var Tag|null $tag */
@@ -56,9 +44,6 @@ class UnparseTagMentions
 
     /**
      * Transforms tag mention tags from XML to raw unparsed content with updated name.
-     *
-     * @param string $xml : Parsed text.
-     * @return string : Unparsed text.
      */
     protected function unparseTagMentionTags(string $xml): string
     {

extensions/mentions/src/Formatter/UnparseUserMentions.php

@@ -9,46 +9,29 @@
 
 namespace Flarum\Mentions\Formatter;
 
+use Flarum\Locale\TranslatorInterface;
 use Flarum\Post\Post;
 use Flarum\User\User;
 use s9e\TextFormatter\Utils;
-use Symfony\Contracts\Translation\TranslatorInterface;
 
 class UnparseUserMentions
 {
-    /**
-     * @var TranslatorInterface
-     */
-    private $translator;
-
-    public function __construct(TranslatorInterface $translator)
-    {
-        $this->translator = $translator;
+    public function __construct(
+        private readonly TranslatorInterface $translator
+    ) {
     }
 
-    /**
-     * Configure rendering for user mentions.
-     *
-     * @param string $xml
-     * @param mixed $context
-     * @return string $xml to be unparsed
-     */
-    public function __invoke($context, string $xml)
+    public function __invoke(mixed $context, string $xml): string
     {
-        $xml = $this->updateUserMentionTags($context, $xml);
-        $xml = $this->unparseUserMentionTags($xml);
-
-        return $xml;
+        return $this->unparseUserMentionTags(
+            $this->updateUserMentionTags($context, $xml)
+        );
     }
 
     /**
      * Updates XML user mention tags before unparsing so that unparsing uses new display names.
-     *
-     * @param mixed $context
-     * @param string $xml : Parsed text.
-     * @return string $xml : Updated XML tags;
      */
-    protected function updateUserMentionTags($context, string $xml): string
+    protected function updateUserMentionTags(mixed $context, string $xml): string
     {
         return Utils::replaceAttributes($xml, 'USERMENTION', function ($attributes) use ($context) {
             $user = (($context && isset($context->getRelations()['mentionsUsers'])) || $context instanceof Post)
@@ -71,9 +54,6 @@ class UnparseUserMentions
 
     /**
      * Transforms user mention tags from XML to raw unparsed content with updated format and display name.
-     *
-     * @param string $xml : Parsed text.
-     * @return string : Unparsed text.
      */
     protected function unparseUserMentionTags(string $xml): string
     {

extensions/mentions/src/Job/SendMentionsNotificationsJob.php

@@ -20,37 +20,14 @@ use Flarum\User\User;
 
 class SendMentionsNotificationsJob extends AbstractJob
 {
-    /**
-     * @var CommentPost
-     */
-    protected $post;
+    private NotificationSyncer $notifications;
 
-    /**
-     * @var array
-     */
-    protected $userMentions;
-
-    /**
-     * @var array
-     */
-    protected $postMentions;
-
-    /**
-     * @var array
-     */
-    protected $groupMentions;
-
-    /**
-     * @var NotificationSyncer
-     */
-    private $notifications;
-
-    public function __construct(CommentPost $post, array $userMentions, array $postMentions, array $groupMentions)
-    {
-        $this->post = $post;
-        $this->userMentions = $userMentions;
-        $this->postMentions = $postMentions;
-        $this->groupMentions = $groupMentions;
+    public function __construct(
+        protected CommentPost $post,
+        protected array $userMentions,
+        protected array $postMentions,
+        protected array $groupMentions
+    ) {
     }
 
     public function handle(NotificationSyncer $notifications): void
@@ -62,7 +39,7 @@ class SendMentionsNotificationsJob extends AbstractJob
         $this->notifyAboutGroupMentions($this->post, $this->groupMentions);
     }
 
-    protected function notifyAboutUserMentions(Post $post, array $mentioned)
+    protected function notifyAboutUserMentions(Post $post, array $mentioned): void
     {
         $users = User::whereIn('id', $mentioned)
             ->with('groups')
@@ -75,7 +52,7 @@ class SendMentionsNotificationsJob extends AbstractJob
         $this->notifications->sync(new UserMentionedBlueprint($post), $users);
     }
 
-    protected function notifyAboutPostMentions(Post $reply, array $mentioned)
+    protected function notifyAboutPostMentions(Post $reply, array $mentioned): void
     {
         $posts = Post::with('user')
             ->whereIn('id', $mentioned)
@@ -91,7 +68,7 @@ class SendMentionsNotificationsJob extends AbstractJob
         }
     }
 
-    protected function notifyAboutGroupMentions(Post $post, array $mentioned)
+    protected function notifyAboutGroupMentions(Post $post, array $mentioned): void
     {
         $users = User::whereHas('groups', function ($query) use ($mentioned) {
             $query->whereIn('groups.id', $mentioned);

extensions/mentions/src/Listener/UpdateMentionsMetadataWhenInvisible.php

@@ -17,26 +17,13 @@ use Flarum\Post\Event\Hidden;
 
 class UpdateMentionsMetadataWhenInvisible
 {
-    /**
-     * @var NotificationSyncer
-     */
-    protected $notifications;
-
-    /**
-     * @var ExtensionManager
-     */
-    protected $extensions;
-
-    public function __construct(NotificationSyncer $notifications, ExtensionManager $extensions)
-    {
-        $this->notifications = $notifications;
-        $this->extensions = $extensions;
+    public function __construct(
+        protected NotificationSyncer $notifications,
+        protected ExtensionManager $extensions
+    ) {
     }
 
-    /**
-     * @param Deleted|Hidden $event
-     */
-    public function handle($event)
+    public function handle(Deleted|Hidden $event): void
     {
         // Remove user mentions
         $event->post->mentionsUsers()->sync([]);

extensions/mentions/src/Listener/UpdateMentionsMetadataWhenVisible.php

@@ -22,26 +22,13 @@ use s9e\TextFormatter\Utils;
 
 class UpdateMentionsMetadataWhenVisible
 {
-    /**
-     * @var ExtensionManager
-     */
-    protected $extensions;
-
-    /**
-     * @var Queue
-     */
-    protected $queue;
-
-    public function __construct(ExtensionManager $extensions, Queue $queue)
-    {
-        $this->extensions = $extensions;
-        $this->queue = $queue;
+    public function __construct(
+        protected ExtensionManager $extensions,
+        protected Queue $queue
+    ) {
     }
 
-    /**
-     * @param Posted|Restored|Revised|PostWasApproved $event
-     */
-    public function handle($event)
+    public function handle(Restored|Revised|Posted|PostWasApproved $event): void
     {
         if (! $event->post instanceof CommentPost) {
             return;
@@ -74,25 +61,25 @@ class UpdateMentionsMetadataWhenVisible
         $this->queue->push(new SendMentionsNotificationsJob($event->post, $userMentions, $postMentions, $groupMentions));
     }
 
-    protected function syncUserMentions(Post $post, array $mentioned)
+    protected function syncUserMentions(Post $post, array $mentioned): void
     {
         $post->mentionsUsers()->sync($mentioned);
         $post->unsetRelation('mentionsUsers');
     }
 
-    protected function syncPostMentions(Post $reply, array $mentioned)
+    protected function syncPostMentions(Post $reply, array $mentioned): void
     {
         $reply->mentionsPosts()->sync($mentioned);
         $reply->unsetRelation('mentionsPosts');
     }
 
-    protected function syncGroupMentions(Post $post, array $mentioned)
+    protected function syncGroupMentions(Post $post, array $mentioned): void
     {
         $post->mentionsGroups()->sync($mentioned);
         $post->unsetRelation('mentionsGroups');
     }
 
-    protected function syncTagMentions(Post $post, array $mentioned)
+    protected function syncTagMentions(Post $post, array $mentioned): void
     {
         $post->mentionsTags()->sync($mentioned);
         $post->unsetRelation('mentionsTags');

extensions/mentions/src/Notification/GroupMentionedBlueprint.php

@@ -9,61 +9,41 @@
 
 namespace Flarum\Mentions\Notification;
 
+use Flarum\Database\AbstractModel;
+use Flarum\Locale\TranslatorInterface;
 use Flarum\Notification\Blueprint\BlueprintInterface;
 use Flarum\Notification\MailableInterface;
 use Flarum\Post\Post;
-use Symfony\Contracts\Translation\TranslatorInterface;
+use Flarum\User\User;
 
 class GroupMentionedBlueprint implements BlueprintInterface, MailableInterface
 {
-    /**
-     * @var Post
-     */
-    public $post;
-
-    /**
-     * @param Post $post
-     */
-    public function __construct(Post $post)
-    {
-        $this->post = $post;
+    public function __construct(
+        public Post $post
+    ) {
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getSubject()
+    public function getSubject(): ?AbstractModel
     {
         return $this->post;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getFromUser()
+    public function getFromUser(): ?User
     {
         return $this->post->user;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getData()
+    public function getData(): mixed
     {
+        return null;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getEmailView()
+    public function getEmailView(): string|array
     {
         return ['text' => 'flarum-mentions::emails.groupMentioned'];
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getEmailSubject(TranslatorInterface $translator)
+    public function getEmailSubject(TranslatorInterface $translator): string
     {
         return $translator->trans('flarum-mentions.email.group_mentioned.subject', [
             '{mentioner_display_name}' => $this->post->user->display_name,
@@ -71,18 +51,12 @@ class GroupMentionedBlueprint implements BlueprintInterface, MailableInterface
         ]);
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getType()
+    public static function getType(): string
     {
         return 'groupMentioned';
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getSubjectModel()
+    public static function getSubjectModel(): string
     {
         return Post::class;
     }

extensions/mentions/src/Notification/PostMentionedBlueprint.php

@@ -9,69 +9,42 @@
 
 namespace Flarum\Mentions\Notification;
 
+use Flarum\Database\AbstractModel;
+use Flarum\Locale\TranslatorInterface;
 use Flarum\Notification\Blueprint\BlueprintInterface;
 use Flarum\Notification\MailableInterface;
 use Flarum\Post\Post;
-use Symfony\Contracts\Translation\TranslatorInterface;
+use Flarum\User\User;
 
 class PostMentionedBlueprint implements BlueprintInterface, MailableInterface
 {
-    /**
-     * @var Post
-     */
-    public $post;
-
-    /**
-     * @var Post
-     */
-    public $reply;
-
-    /**
-     * @param Post $post
-     * @param Post $reply
-     */
-    public function __construct(Post $post, Post $reply)
-    {
-        $this->post = $post;
-        $this->reply = $reply;
+    public function __construct(
+        public Post $post,
+        public Post $reply
+    ) {
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getSubject()
+    public function getSubject(): ?AbstractModel
     {
         return $this->post;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getFromUser()
+    public function getFromUser(): ?User
     {
         return $this->reply->user;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getData()
+    public function getData(): array
     {
         return ['replyNumber' => (int) $this->reply->number];
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getEmailView()
+    public function getEmailView(): string|array
     {
         return ['text' => 'flarum-mentions::emails.postMentioned'];
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getEmailSubject(TranslatorInterface $translator)
+    public function getEmailSubject(TranslatorInterface $translator): string
     {
         return $translator->trans('flarum-mentions.email.post_mentioned.subject', [
             '{replier_display_name}' => $this->reply->user->display_name,
@@ -79,18 +52,12 @@ class PostMentionedBlueprint implements BlueprintInterface, MailableInterface
         ]);
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getType()
+    public static function getType(): string
     {
         return 'postMentioned';
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getSubjectModel()
+    public static function getSubjectModel(): string
     {
         return Post::class;
     }

extensions/mentions/src/Notification/UserMentionedBlueprint.php

@@ -9,61 +9,41 @@
 
 namespace Flarum\Mentions\Notification;
 
+use Flarum\Database\AbstractModel;
+use Flarum\Locale\TranslatorInterface;
 use Flarum\Notification\Blueprint\BlueprintInterface;
 use Flarum\Notification\MailableInterface;
 use Flarum\Post\Post;
-use Symfony\Contracts\Translation\TranslatorInterface;
+use Flarum\User\User;
 
 class UserMentionedBlueprint implements BlueprintInterface, MailableInterface
 {
-    /**
-     * @var Post
-     */
-    public $post;
-
-    /**
-     * @param Post $post
-     */
-    public function __construct(Post $post)
-    {
-        $this->post = $post;
+    public function __construct(
+        public Post $post
+    ) {
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getSubject()
+    public function getSubject(): ?AbstractModel
     {
         return $this->post;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getFromUser()
+    public function getFromUser(): ?User
     {
         return $this->post->user;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getData()
+    public function getData(): mixed
     {
+        return null;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getEmailView()
+    public function getEmailView(): string|array
     {
         return ['text' => 'flarum-mentions::emails.userMentioned'];
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getEmailSubject(TranslatorInterface $translator)
+    public function getEmailSubject(TranslatorInterface $translator): string
     {
         return $translator->trans('flarum-mentions.email.user_mentioned.subject', [
             '{mentioner_display_name}' => $this->post->user->display_name,
@@ -71,18 +51,12 @@ class UserMentionedBlueprint implements BlueprintInterface, MailableInterface
         ]);
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getType()
+    public static function getType(): string
     {
         return 'userMentioned';
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public static function getSubjectModel()
+    public static function getSubjectModel(): string
     {
         return Post::class;
     }

extensions/nicknames/src/Access/UserPolicy.php

@@ -15,21 +15,11 @@ use Flarum\User\User;
 
 class UserPolicy extends AbstractPolicy
 {
-    /**
-     * @var SettingsRepositoryInterface
-     */
-    protected $settings;
-
-    public function __construct(SettingsRepositoryInterface $settings)
-    {
-        $this->settings = $settings;
+    public function __construct(
+        protected SettingsRepositoryInterface $settings
+    ) {
     }
 
-    /**
-     * @param User $actor
-     * @param User $user
-     * @return bool|null
-     */
     public function editNickname(User $actor, User $user)
     {
         if ($actor->isGuest() && ! $user->exists && $this->settings->get('flarum-nicknames.set_on_registration')) {

extensions/nicknames/src/AddNicknameValidation.php

@@ -9,29 +9,20 @@
 
 namespace Flarum\Nicknames;
 
+use Flarum\Locale\TranslatorInterface;
 use Flarum\Settings\SettingsRepositoryInterface;
+use Flarum\User\UserValidator;
 use Illuminate\Validation\Validator;
-use Symfony\Contracts\Translation\TranslatorInterface;
 
 class AddNicknameValidation
 {
-    /**
-     * @var SettingsRepositoryInterface
-     */
-    protected $settings;
-
-    /**
-     * @var TranslatorInterface
-     */
-    protected $translator;
-
-    public function __construct(SettingsRepositoryInterface $settings, TranslatorInterface $translator)
-    {
-        $this->settings = $settings;
-        $this->translator = $translator;
+    public function __construct(
+        protected SettingsRepositoryInterface $settings,
+        protected TranslatorInterface $translator
+    ) {
     }
 
-    public function __invoke($flarumValidator, Validator $validator)
+    public function __invoke(UserValidator $flarumValidator, Validator $validator): void
     {
         $idSuffix = $flarumValidator->getUser() ? ','.$flarumValidator->getUser()->id : '';
         $rules = $validator->getRules();

extensions/nicknames/src/NicknameDriver.php

@@ -16,6 +16,6 @@ class NicknameDriver implements DriverInterface
 {
     public function displayName(User $user): string
     {
-        return $user->nickname ? $user->nickname : $user->username;
+        return $user->nickname ?? $user->username;
     }
 }

extensions/nicknames/src/NicknameFullTextGambit.php

@@ -19,27 +19,16 @@ namespace Flarum\Nicknames;
 use Flarum\Search\GambitInterface;
 use Flarum\Search\SearchState;
 use Flarum\User\UserRepository;
+use Illuminate\Database\Eloquent\Builder;
 
 class NicknameFullTextGambit implements GambitInterface
 {
-    /**
-     * @var UserRepository
-     */
-    protected $users;
-
-    /**
-     * @param \Flarum\User\UserRepository $users
-     */
-    public function __construct(UserRepository $users)
-    {
-        $this->users = $users;
+    public function __construct(
+        protected UserRepository $users
+    ) {
     }
 
-    /**
-     * @param $searchValue
-     * @return \Illuminate\Database\Eloquent\Builder
-     */
-    private function getUserSearchSubQuery($searchValue)
+    private function getUserSearchSubQuery(string $searchValue): Builder
     {
         return $this->users
             ->query()
@@ -48,15 +37,12 @@ class NicknameFullTextGambit implements GambitInterface
             ->orWhere('nickname', 'like', "{$searchValue}%");
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function apply(SearchState $search, $searchValue)
+    public function apply(SearchState $search, string $bit): bool
     {
         $search->getQuery()
             ->whereIn(
                 'id',
-                $this->getUserSearchSubQuery($searchValue)
+                $this->getUserSearchSubQuery($bit)
             );
 
         return true;

extensions/nicknames/src/SaveNicknameToDatabase.php

@@ -15,17 +15,12 @@ use Illuminate\Support\Arr;
 
 class SaveNicknameToDatabase
 {
-    /**
-     * @var SettingsRepositoryInterface
-     */
-    protected $settings;
-
-    public function __construct(SettingsRepositoryInterface $settings)
-    {
-        $this->settings = $settings;
+    public function __construct(
+        protected SettingsRepositoryInterface $settings
+    ) {
     }
 
-    public function handle(Saving $event)
+    public function handle(Saving $event): void
     {
         $user = $event->user;
         $data = $event->data;

extensions/package-manager/src/Api/Controller/CheckForUpdatesController.php

@@ -19,19 +19,11 @@ use Psr\Http\Server\RequestHandlerInterface;
 
 class CheckForUpdatesController implements RequestHandlerInterface
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
-    /**
-     * @throws \Flarum\User\Exception\PermissionDeniedException
-     */
     public function handle(ServerRequestInterface $request): ResponseInterface
     {
         $actor = RequestUtil::getActor($request);

extensions/package-manager/src/Api/Controller/GlobalUpdateController.php

@@ -20,19 +20,11 @@ use Psr\Http\Server\RequestHandlerInterface;
 
 class GlobalUpdateController implements RequestHandlerInterface
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
-    /**
-     * @throws \Flarum\User\Exception\PermissionDeniedException
-     */
     public function handle(ServerRequestInterface $request): ResponseInterface
     {
         $actor = RequestUtil::getActor($request);

extensions/package-manager/src/Api/Controller/ListTasksController.php

@@ -19,28 +19,15 @@ use Tobscure\JsonApi\Document;
 
 class ListTasksController extends AbstractListController
 {
-    /**
-     * {@inheritdoc}
-     */
-    public $serializer = TaskSerializer::class;
+    public ?string $serializer = TaskSerializer::class;
 
-    /**
-     * @var UrlGenerator
-     */
-    protected $url;
-
-    /**
-     * @var TaskRepository
-     */
-    protected $repository;
-
-    public function __construct(UrlGenerator $url, TaskRepository $repository)
-    {
-        $this->url = $url;
-        $this->repository = $repository;
+    public function __construct(
+        protected UrlGenerator $url,
+        protected TaskRepository $repository
+    ) {
     }
 
-    protected function data(ServerRequestInterface $request, Document $document)
+    protected function data(ServerRequestInterface $request, Document $document): iterable
     {
         $actor = RequestUtil::getActor($request);
 

extensions/package-manager/src/Api/Controller/MajorUpdateController.php

@@ -21,14 +21,9 @@ use Psr\Http\Server\RequestHandlerInterface;
 
 class MajorUpdateController implements RequestHandlerInterface
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
     public function handle(ServerRequestInterface $request): ResponseInterface

extensions/package-manager/src/Api/Controller/MinorUpdateController.php

@@ -20,19 +20,11 @@ use Psr\Http\Server\RequestHandlerInterface;
 
 class MinorUpdateController implements RequestHandlerInterface
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
-    /**
-     * @throws \Flarum\User\Exception\PermissionDeniedException
-     */
     public function handle(ServerRequestInterface $request): ResponseInterface
     {
         $actor = RequestUtil::getActor($request);

extensions/package-manager/src/Api/Controller/RemoveExtensionController.php

@@ -21,14 +21,9 @@ use Psr\Http\Server\RequestHandlerInterface;
 
 class RemoveExtensionController implements RequestHandlerInterface
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
     public function handle(ServerRequestInterface $request): ResponseInterface

extensions/package-manager/src/Api/Controller/RequireExtensionController.php

@@ -20,14 +20,9 @@ use Psr\Http\Server\RequestHandlerInterface;
 
 class RequireExtensionController implements RequestHandlerInterface
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
     public function handle(ServerRequestInterface $request): ResponseInterface

extensions/package-manager/src/Api/Controller/UpdateExtensionController.php

@@ -21,14 +21,9 @@ use Psr\Http\Server\RequestHandlerInterface;
 
 class UpdateExtensionController implements RequestHandlerInterface
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
     public function handle(ServerRequestInterface $request): ResponseInterface

extensions/package-manager/src/Api/Controller/WhyNotController.php

@@ -20,14 +20,9 @@ use Psr\Http\Server\RequestHandlerInterface;
 
 class WhyNotController implements RequestHandlerInterface
 {
-    /**
-     * @var Dispatcher
-     */
-    protected $bus;
-
-    public function __construct(Dispatcher $bus)
-    {
-        $this->bus = $bus;
+    public function __construct(
+        protected Dispatcher $bus
+    ) {
     }
 
     public function handle(ServerRequestInterface $request): ResponseInterface

extensions/package-manager/src/Api/Serializer/TaskSerializer.php

@@ -15,18 +15,12 @@ use InvalidArgumentException;
 
 class TaskSerializer extends AbstractSerializer
 {
-    /**
-     * {@inheritdoc}
-     */
     protected $type = 'package-manager-tasks';
 
     /**
-     * {@inheritdoc}
-     *
-     * @param Task $model
      * @throws InvalidArgumentException
      */
-    protected function getDefaultAttributes($model)
+    protected function getDefaultAttributes(object|array $model): array
     {
         if (! ($model instanceof Task)) {
             throw new InvalidArgumentException(

extensions/package-manager/src/Command/AbstractActionCommand.php

@@ -13,15 +13,8 @@ use Flarum\PackageManager\Task\Task;
 
 abstract class AbstractActionCommand
 {
-    /**
-     * @var Task|null
-     */
-    public $task = null;
-
-    /**
-     * @var string|null
-     */
-    public $package = null;
+    public ?Task $task = null;
+    public ?string $package = null;
 
     abstract public function getOperationName(): string;
 }

extensions/package-manager/src/Command/CheckForUpdates.php

@@ -14,14 +14,9 @@ use Flarum\User\User;
 
 class CheckForUpdates extends AbstractActionCommand
 {
-    /**
-     * @var \Flarum\User\User
-     */
-    public $actor;
-
-    public function __construct(User $actor)
-    {
-        $this->actor = $actor;
+    public function __construct(
+        public User $actor
+    ) {
     }
 
     public function getOperationName(): string

extensions/package-manager/src/Command/CheckForUpdatesHandler.php

@@ -16,20 +16,10 @@ use Symfony\Component\Console\Input\ArrayInput;
 
 class CheckForUpdatesHandler
 {
-    /**
-     * @var ComposerAdapter
-     */
-    protected $composer;
-
-    /**
-     * @var \Flarum\PackageManager\Settings\LastUpdateCheck
-     */
-    protected $lastUpdateCheck;
-
-    public function __construct(ComposerAdapter $composer, LastUpdateCheck $lastUpdateCheck)
-    {
-        $this->composer = $composer;
-        $this->lastUpdateCheck = $lastUpdateCheck;
+    public function __construct(
+        private ComposerAdapter $composer,
+        private LastUpdateCheck $lastUpdateCheck
+    ) {
     }
 
     /**
@@ -50,7 +40,7 @@ class CheckForUpdatesHandler
      *
      * @throws ComposerCommandFailedException
      */
-    public function handle(CheckForUpdates $command)
+    public function handle(CheckForUpdates $command): array
     {
         $firstOutput = $this->runComposerCommand(false, $command);
         $firstOutput = json_decode($this->cleanJson($firstOutput), true);

extensions/package-manager/src/Command/GlobalUpdate.php

@@ -14,14 +14,9 @@ use Flarum\User\User;
 
 class GlobalUpdate extends AbstractActionCommand
 {
-    /**
-     * @var \Flarum\User\User
-     */
-    public $actor;
-
-    public function __construct(User $actor)
-    {
-        $this->actor = $actor;
+    public function __construct(
+        public User $actor
+    ) {
     }
 
     public function getOperationName(): string

extensions/package-manager/src/Command/GlobalUpdateHandler.php

@@ -18,32 +18,14 @@ use Symfony\Component\Console\Input\StringInput;
 
 class GlobalUpdateHandler
 {
-    /**
-     * @var ComposerAdapter
-     */
-    protected $composer;
-
-    /**
-     * @var Dispatcher
-     */
-    protected $events;
-
-    /**
-     * @var FlarumDispatcher
-     */
-    protected $commandDispatcher;
-
-    public function __construct(ComposerAdapter $composer, Dispatcher $events, FlarumDispatcher $commandDispatcher)
-    {
-        $this->composer = $composer;
-        $this->events = $events;
-        $this->commandDispatcher = $commandDispatcher;
+    public function __construct(
+        protected ComposerAdapter $composer,
+        protected Dispatcher $events,
+        protected FlarumDispatcher $commandDispatcher
+    ) {
     }
 
-    /**
-     * @throws \Flarum\User\Exception\PermissionDeniedException|ComposerUpdateFailedException
-     */
-    public function handle(GlobalUpdate $command)
+    public function handle(GlobalUpdate $command): void
     {
         $command->actor->assertAdmin();
 

extensions/package-manager/src/Command/MajorUpdate.php

@@ -14,20 +14,10 @@ use Flarum\User\User;
 
 class MajorUpdate extends AbstractActionCommand
 {
-    /**
-     * @var \Flarum\User\User
-     */
-    public $actor;
-
-    /**
-     * @var bool
-     */
-    public $dryRun;
-
-    public function __construct(User $actor, bool $dryRun)
-    {
-        $this->actor = $actor;
-        $this->dryRun = $dryRun;
+    public function __construct(
+        public User $actor,
+        public bool $dryRun
+    ) {
     }
 
     public function getOperationName(): string

extensions/package-manager/src/Command/MajorUpdateHandler.php

@@ -20,38 +20,12 @@ use Symfony\Component\Console\Input\ArrayInput;
 
 class MajorUpdateHandler
 {
-    /**
-     * @var ComposerAdapter
-     */
-    protected $composer;
-
-    /**
-     * @var LastUpdateCheck
-     */
-    protected $lastUpdateCheck;
-
-    /**
-     * @var Dispatcher
-     */
-    protected $events;
-
-    /**
-     * @var ComposerJson
-     */
-    protected $composerJson;
-
-    /**
-     * @param ComposerAdapter $composer
-     * @param LastUpdateCheck $lastUpdateCheck
-     * @param Dispatcher $events
-     * @param ComposerJson $composerJson
-     */
-    public function __construct(ComposerAdapter $composer, LastUpdateCheck $lastUpdateCheck, Dispatcher $events, ComposerJson $composerJson)
-    {
-        $this->composer = $composer;
-        $this->lastUpdateCheck = $lastUpdateCheck;
-        $this->events = $events;
-        $this->composerJson = $composerJson;
+    public function __construct(
+        protected ComposerAdapter $composer,
+        protected LastUpdateCheck $lastUpdateCheck,
+        protected Dispatcher $events,
+        protected ComposerJson $composerJson
+    ) {
     }
 
     /**
@@ -64,7 +38,7 @@ class MajorUpdateHandler
      * @throws \Flarum\User\Exception\PermissionDeniedException
      * @throws NoNewMajorVersionException|MajorUpdateFailedException
      */
-    public function handle(MajorUpdate $command)
+    public function handle(MajorUpdate $command): void
     {
         $command->actor->assertAdmin();
 

extensions/package-manager/src/Command/MinorUpdate.php

@@ -14,14 +14,9 @@ use Flarum\User\User;
 
 class MinorUpdate extends AbstractActionCommand
 {
-    /**
-     * @var \Flarum\User\User
-     */
-    public $actor;
-
-    public function __construct(User $actor)
-    {
-        $this->actor = $actor;
+    public function __construct(
+        public User $actor
+    ) {
     }
 
     public function getOperationName(): string

extensions/package-manager/src/Command/MinorUpdateHandler.php

@@ -19,39 +19,15 @@ use Symfony\Component\Console\Input\StringInput;
 
 class MinorUpdateHandler
 {
-    /**
-     * @var ComposerAdapter
-     */
-    protected $composer;
-
-    /**
-     * @var \Flarum\PackageManager\Settings\LastUpdateCheck
-     */
-    protected $lastUpdateCheck;
-
-    /**
-     * @var Dispatcher
-     */
-    protected $events;
-
-    /**
-     * @var ComposerJson
-     */
-    protected $composerJson;
-
-    public function __construct(ComposerAdapter $composer, LastUpdateCheck $lastUpdateCheck, Dispatcher $events, ComposerJson $composerJson)
-    {
-        $this->composer = $composer;
-        $this->lastUpdateCheck = $lastUpdateCheck;
-        $this->events = $events;
-        $this->composerJson = $composerJson;
+    public function __construct(
+        protected ComposerAdapter $composer,
+        protected LastUpdateCheck $lastUpdateCheck,
+        protected Dispatcher $events,
+        protected ComposerJson $composerJson
+    ) {
     }
 
-    /**
-     * @throws \Flarum\User\Exception\PermissionDeniedException
-     * @throws ComposerUpdateFailedException
-     */
-    public function handle(MinorUpdate $command)
+    public function handle(MinorUpdate $command): void
     {
         $command->actor->assertAdmin();
 

extensions/package-manager/src/Command/RemoveExtension.php

@@ -14,20 +14,10 @@ use Flarum\User\User;
 
 class RemoveExtension extends AbstractActionCommand
 {
-    /**
-     * @var User
-     */
-    public $actor;
-
-    /**
-     * @var string
-     */
-    public $extensionId;
-
-    public function __construct(User $actor, string $extensionId)
-    {
-        $this->actor = $actor;
-        $this->extensionId = $extensionId;
+    public function __construct(
+        public User $actor,
+        public string $extensionId
+    ) {
     }
 
     public function getOperationName(): string

extensions/package-manager/src/Command/RemoveExtensionHandler.php

@@ -19,33 +19,14 @@ use Symfony\Component\Console\Input\StringInput;
 
 class RemoveExtensionHandler
 {
-    /**
-     * @var ComposerAdapter
-     */
-    protected $composer;
-
-    /**
-     * @var ExtensionManager
-     */
-    protected $extensions;
-
-    /**
-     * @var Dispatcher
-     */
-    protected $events;
-
-    public function __construct(ComposerAdapter $composer, ExtensionManager $extensions, Dispatcher $events)
-    {
-        $this->composer = $composer;
-        $this->extensions = $extensions;
-        $this->events = $events;
+    public function __construct(
+        private ComposerAdapter $composer,
+        private ExtensionManager $extensions,
+        private Dispatcher $events
+    ) {
     }
 
-    /**
-     * @throws \Flarum\User\Exception\PermissionDeniedException
-     * @throws \Exception
-     */
-    public function handle(RemoveExtension $command)
+    public function handle(RemoveExtension $command): void
     {
         $command->actor->assertAdmin();
 

extensions/package-manager/src/Command/RequireExtension.php

@@ -14,20 +14,10 @@ use Flarum\User\User;
 
 class RequireExtension extends AbstractActionCommand
 {
-    /**
-     * @var User
-     */
-    public $actor;
-
-    /**
-     * @var string
-     */
-    public $package;
-
-    public function __construct(User $actor, string $package)
-    {
-        $this->actor = $actor;
-        $this->package = $package;
+    public function __construct(
+        public User $actor,
+        public ?string $package
+    ) {
     }
 
     public function getOperationName(): string