feat: add Reverb realtime messaging

routes/channels.php

@@ -1,7 +1,52 @@
 <?php
 
+use App\Models\Conversation;
+use App\Policies\ConversationPolicy;
 use Illuminate\Support\Facades\Broadcast;
 
 Broadcast::channel('App.Models.User.{id}', function ($user, $id) {
     return (int) $user->id === (int) $id;
 });
+
+Broadcast::channel('user.{id}', function ($user, $id) {
+    return (int) $user->id === (int) $id;
+});
+
+Broadcast::channel('private-user.{id}', function ($user, $id) {
+    return (int) $user->id === (int) $id;
+});
+
+Broadcast::channel('conversation.{conversationId}', function ($user, $conversationId) {
+    $conversation = Conversation::query()->find($conversationId);
+
+    if (! $conversation) {
+        return false;
+    }
+
+    return app(ConversationPolicy::class)->view($user, $conversation);
+});
+
+Broadcast::channel('private-conversation.{conversationId}', function ($user, $conversationId) {
+    $conversation = Conversation::query()->find($conversationId);
+
+    if (! $conversation) {
+        return false;
+    }
+
+    return app(ConversationPolicy::class)->view($user, $conversation);
+});
+
+Broadcast::channel('presence-conversation.{conversationId}', function ($user, $conversationId) {
+    $conversation = Conversation::query()->find($conversationId);
+
+    if (! $conversation || ! app(ConversationPolicy::class)->joinPresence($user, $conversation)) {
+        return false;
+    }
+
+    return [
+        'id' => (int) $user->id,
+        'username' => (string) $user->username,
+        'display_name' => (string) ($user->name ?: $user->username),
+        'avatar_thumb_url' => null,
+    ];
+});