新增聊天室刷新同步与全员刷新功能

app/Events/BrowserRefreshRequested.php

@@ -0,0 +1,62 @@
+<?php
+
+/**
+ * 文件功能：聊天室浏览器刷新请求广播事件
+ *
+ * 仅供站长触发“刷新全员”命令时使用，
+ * 向当前房间所有在线用户广播前端刷新指令。
+ *
+ * @author   ChatRoom Laravel
+ *
+ * @version  1.0.0
+ */
+
+namespace App\Events;
+
+use Illuminate\Broadcasting\InteractsWithSockets;
+use Illuminate\Broadcasting\PresenceChannel;
+use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+/**
+ * 类功能：向房间内全部在线用户广播页面刷新指令。
+ */
+class BrowserRefreshRequested implements ShouldBroadcastNow
+{
+    use Dispatchable, InteractsWithSockets, SerializesModels;
+
+    /**
+     * 构造函数：记录房间与操作者信息。
+     */
+    public function __construct(
+        public readonly int $roomId,
+        public readonly string $operator,
+        public readonly string $reason = '',
+    ) {}
+
+    /**
+     * 广播频道：当前聊天室 PresenceChannel。
+     *
+     * @return array<int, \Illuminate\Broadcasting\Channel>
+     */
+    public function broadcastOn(): array
+    {
+        return [
+            new PresenceChannel('room.'.$this->roomId),
+        ];
+    }
+
+    /**
+     * 广播数据：前端用于展示提示并执行刷新。
+     *
+     * @return array<string, mixed>
+     */
+    public function broadcastWith(): array
+    {
+        return [
+            'operator' => $this->operator,
+            'reason' => $this->reason,
+        ];
+    }
+}