Initial commit

extensions/likes/src/Events/PostWasLiked.php

@@ -0,0 +1,27 @@
+<?php namespace Flarum\Likes\Events;
+
+use Flarum\Core\Models\Post;
+use Flarum\Core\Models\User;
+
+class PostWasLiked
+{
+    /**
+     * @var \Flarum\Core\Models\Post
+     */
+    public $post;
+
+    /**
+     * @var \Flarum\Core\Models\User
+     */
+    public $user;
+
+    /**
+     * @param \Flarum\Core\Models\Post $post
+     * @param \Flarum\Core\Models\User $user
+     */
+    public function __construct(Post $post, User $user)
+    {
+        $this->post = $post;
+        $this->user = $user;
+    }
+}

extensions/likes/src/Events/PostWasUnliked.php

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+<?php namespace Flarum\Likes\Events;
+
+use Flarum\Core\Models\Post;
+use Flarum\Core\Models\User;
+
+class PostWasUnliked
+{
+    /**
+     * @var \Flarum\Core\Models\Post
+     */
+    public $post;
+
+    /**
+     * @var \Flarum\Core\Models\User
+     */
+    public $user;
+
+    /**
+     * @param \Flarum\Core\Models\Post $post
+     * @param \Flarum\Core\Models\User $user
+     */
+    public function __construct(Post $post, User $user)
+    {
+        $this->post = $post;
+        $this->user = $user;
+    }
+}

extensions/likes/src/Handlers/LikedSaver.php

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+<?php namespace Flarum\Likes\Handlers;
+
+use Flarum\Likes\Events\PostWasLiked;
+use Flarum\Likes\Events\PostWasUnliked;
+use Flarum\Core\Events\PostWillBeSaved;
+use Flarum\Core\Events\PostWasDeleted;
+use Flarum\Core\Models\Post;
+use Flarum\Core\Exceptions\PermissionDeniedException;
+
+class LikedSaver
+{
+    public function subscribe($events)
+    {
+        $events->listen('Flarum\Core\Events\PostWillBeSaved', __CLASS__.'@whenPostWillBeSaved');
+        $events->listen('Flarum\Core\Events\PostWasDeleted', __CLASS__.'@whenPostWasDeleted');
+    }
+
+    public function whenPostWillBeSaved(PostWillBeSaved $event)
+    {
+        $post = $event->post;
+        $data = $event->command->data;
+
+        if ($post->exists && isset($data['isLiked'])) {
+            $user = $event->command->user;
+            $liked = (bool) $data['isLiked'];
+
+            if (! $post->can($user, 'like')) {
+                throw new PermissionDeniedException;
+            }
+
+            if ($liked) {
+                $post->likes()->attach($user->id);
+
+                $post->raise(new PostWasLiked($post, $user));
+            } else {
+                $post->likes()->detach($user->id);
+
+                $post->raise(new PostWasUnliked($post, $user));
+            }
+        }
+    }
+
+    public function whenPostWasDeleted(PostWasDeleted $event)
+    {
+        $event->post->likes()->detach();
+    }
+}

extensions/likes/src/Handlers/PostLikedNotifier.php

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+<?php namespace Flarum\Likes\Handlers;
+
+use Flarum\Likes\PostLikedNotification;
+use Flarum\Likes\Events\PostWasLiked;
+use Flarum\Likes\Events\PostWasUnliked;
+use Flarum\Core\Notifications\NotificationSyncer;
+use Illuminate\Contracts\Events\Dispatcher;
+
+class PostLikedNotifier
+{
+    protected $notifications;
+
+    public function __construct(NotificationSyncer $notifications)
+    {
+        $this->notifications = $notifications;
+    }
+
+    /**
+     * Register the listeners for the subscriber.
+     *
+     * @param \Illuminate\Contracts\Events\Dispatcher $events
+     */
+    public function subscribe(Dispatcher $events)
+    {
+        $events->listen('Flarum\Likes\Events\PostWasLiked', __CLASS__.'@whenPostWasLiked');
+        $events->listen('Flarum\Likes\Events\PostWasUnliked', __CLASS__.'@whenPostWasUnliked');
+    }
+
+    public function whenPostWasLiked(PostWasLiked $event)
+    {
+        if ($event->post->user->id != $event->user->id) {
+            $this->sync($event->post, $event->user, [$event->post->user]);
+        }
+    }
+
+    public function whenPostWasUnliked(PostWasUnliked $event)
+    {
+        if ($event->post->user->id != $event->user->id) {
+            $this->sync($event->post, $event->user, []);
+        }
+    }
+
+    public function sync($post, $user, array $recipients)
+    {
+        $this->notifications->sync(
+            new PostLikedNotification($post, $user),
+            $recipients
+        );
+    }
+}

extensions/likes/src/LikesServiceProvider.php

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+<?php namespace Flarum\Likes;
+
+use Flarum\Support\ServiceProvider;
+use Flarum\Extend;
+
+class LikesServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap the application events.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        $this->extend([
+            (new Extend\Locale('en'))->translations(__DIR__.'/../locale/en.yml'),
+
+            (new Extend\ForumClient)
+                ->assets([
+                    __DIR__.'/../js/dist/extension.js',
+                    __DIR__.'/../less/extension.less'
+                ]),
+
+            (new Extend\Model('Flarum\Core\Models\Post'))
+                ->belongsToMany('likes', 'Flarum\Core\Models\User', 'posts_likes', 'post_id', 'user_id'),
+
+            (new Extend\ApiSerializer('Flarum\Api\Serializers\PostSerializer'))
+                ->hasMany('likes', 'Flarum\Api\Serializers\UserBasicSerializer')
+                ->attributes(function (&$attributes, $post, $user) {
+                    $attributes['canLike'] = $post->can($user, 'like');
+                }),
+
+            (new Extend\ApiAction('Flarum\Api\Actions\Discussions\ShowAction'))
+                ->addInclude('posts.likes'),
+
+            (new Extend\ApiAction([
+                'Flarum\Api\Actions\Posts\IndexAction',
+                'Flarum\Api\Actions\Posts\ShowAction',
+                'Flarum\Api\Actions\Posts\CreateAction',
+                'Flarum\Api\Actions\Posts\UpdateAction'
+            ]))
+                ->addInclude('likes'),
+
+            new Extend\EventSubscriber('Flarum\Likes\Handlers\LikedSaver'),
+            new Extend\EventSubscriber('Flarum\Likes\Handlers\PostLikedNotifier'),
+
+            (new Extend\NotificationType(
+                'Flarum\Likes\PostLikedNotification',
+                'Flarum\Api\Serializers\PostBasicSerializer'
+            ))
+                ->enableByDefault('alert')
+        ]);
+    }
+
+    /**
+     * Register the service provider.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        //
+    }
+}

extensions/likes/src/PostLikedNotification.php

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+<?php namespace Flarum\Likes;
+
+use Flarum\Core\Models\Post;
+use Flarum\Core\Models\User;
+use Flarum\Core\Notifications\NotificationAbstract;
+
+class PostLikedNotification extends NotificationAbstract
+{
+    public $post;
+
+    public $user;
+
+    public function __construct(Post $post, User $user)
+    {
+        $this->post = $post;
+        $this->user = $user;
+    }
+
+    public function getSubject()
+    {
+        return $this->post;
+    }
+
+    public function getSender()
+    {
+        return $this->user;
+    }
+
+    public static function getType()
+    {
+        return 'postLiked';
+    }
+
+    public static function getSubjectModel()
+    {
+        return 'Flarum\Core\Models\Post';
+    }
+}