feat: messages extension (#4028)

* feat: private messages

extensions/messages/extend.php

@@ -0,0 +1,87 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Messages;
+
+use Flarum\Api\Context;
+use Flarum\Api\Resource;
+use Flarum\Api\Schema;
+use Flarum\Extend;
+use Flarum\Messages\Http\Middleware\PopulateDialogWithActor;
+use Flarum\Search\Database\DatabaseSearchDriver;
+use Flarum\User\User;
+use Illuminate\Database\Eloquent\Builder;
+
+return [
+    (new Extend\Frontend('forum'))
+        ->js(__DIR__.'/js/dist/forum.js')
+        ->css(__DIR__.'/less/forum.less')
+        ->jsDirectory(__DIR__.'/js/dist/forum')
+        ->route('/messages', 'messages')
+        ->route('/messages/dialog/{id:\d+}', 'messages.dialog'),
+
+    (new Extend\Frontend('admin'))
+        ->js(__DIR__.'/js/dist/admin.js')
+        ->css(__DIR__.'/less/admin.less'),
+
+    new Extend\Locales(__DIR__.'/locale'),
+
+    (new Extend\View())->namespace('flarum-messages', __DIR__.'/views'),
+
+    (new Extend\Model(User::class))
+        ->belongsToMany('dialogs', Dialog::class, 'dialog_user')
+        ->hasMany('dialogMessages', DialogMessage::class, 'user_id'),
+
+    (new Extend\ModelVisibility(Dialog::class))
+        ->scope(Access\ScopeDialogVisibility::class),
+
+    (new Extend\ModelVisibility(DialogMessage::class))
+        ->scope(Access\ScopeDialogMessageVisibility::class),
+
+    new Extend\ApiResource(Api\Resource\DialogResource::class),
+
+    new Extend\ApiResource(Api\Resource\DialogMessageResource::class),
+
+    (new Extend\ApiResource(Resource\UserResource::class))
+        ->fields(fn () => [
+            Schema\Boolean::make('canSendAnyMessage')
+                ->get(fn (object $model, Context $context) => $context->getActor()->can('sendAnyMessage')),
+            Schema\Integer::make('messageCount')
+                ->get(function (object $model, Context $context) {
+                    return Dialog::whereVisibleTo($context->getActor())
+                        ->whereHas('users', function (Builder $query) use ($context) {
+                            $query->where('dialog_user.user_id', $context->getActor()->id)
+                                ->whereColumn('dialog_user.last_read_message_id', '<', 'dialogs.last_message_id');
+                        })->count();
+                }),
+        ]),
+
+    (new Extend\Middleware('api'))
+        ->add(PopulateDialogWithActor::class),
+
+    (new Extend\Policy())
+        ->modelPolicy(Dialog::class, Access\DialogPolicy::class)
+        ->modelPolicy(DialogMessage::class, Access\DialogMessagePolicy::class)
+        ->globalPolicy(Access\GlobalPolicy::class),
+
+    (new Extend\SearchDriver(DatabaseSearchDriver::class))
+        ->addSearcher(Dialog::class, Search\DialogSearcher::class)
+        ->addSearcher(DialogMessage::class, Search\DialogMessageSearcher::class)
+        ->addFilter(Search\DialogMessageSearcher::class, DialogMessage\Filter\DialogFilter::class)
+        ->addFilter(Search\DialogSearcher::class, Dialog\Filter\UnreadFilter::class),
+
+    (new Extend\ServiceProvider())
+        ->register(DialogServiceProvider::class),
+
+    (new Extend\Notification())
+        ->type(Notification\MessageReceivedBlueprint::class, ['email']),
+
+    (new Extend\Event())
+        ->listen(DialogMessage\Event\Created::class, Listener\SendNotificationWhenMessageSent::class),
+];