pllx
112 lines
2.8 KiB
PHP
112 lines
2.8 KiB
PHP
<?php
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/**
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* 文件功能：用户发送新消息广播事件
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*
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* @author ChatRoom Laravel
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*
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* @version 1.0.0
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*/
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namespace App\Events;
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use App\Models\User;
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use Illuminate\Broadcasting\InteractsWithSockets;
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use Illuminate\Broadcasting\PresenceChannel;
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use Illuminate\Broadcasting\PrivateChannel;
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use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
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use Illuminate\Foundation\Events\Dispatchable;
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use Illuminate\Queue\SerializesModels;
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/**
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* 类功能：根据消息可见范围选择广播频道。
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*/
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class MessageSent implements ShouldBroadcastNow
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{
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use Dispatchable, InteractsWithSockets, SerializesModels;
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/**
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* 创建消息广播事件实例。
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*
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* @param int $roomId 房间 ID
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* @param array $message 发送的消息数据
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*/
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public function __construct(
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public readonly int $roomId,
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public readonly array $message,
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) {}
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/**
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* 获取消息应广播到的频道。
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*
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* 公共消息和普通定向发言走房间 Presence 频道；
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* 悄悄话只发给发送方与接收方的私有用户频道。
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*
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* @return array<int, \Illuminate\Broadcasting\Channel>
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*/
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public function broadcastOn(): array
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{
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if ($this->shouldBroadcastPrivately()) {
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$privateChannels = [];
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foreach ($this->resolveVisibleUserIds() as $userId) {
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$privateChannels[] = new PrivateChannel('user.'.$userId);
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}
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return $privateChannels;
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}
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return [
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new PresenceChannel('room.'.$this->roomId),
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];
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}
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/**
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* 获取广播时的数据
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*
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* @return array<string, mixed>
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*/
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public function broadcastWith(): array
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{
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return [
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'message' => $this->message,
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];
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}
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/**
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* 判断当前消息是否应仅广播给特定用户。
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*/
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private function shouldBroadcastPrivately(): bool
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{
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return (bool) ($this->message['is_secret'] ?? false);
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}
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/**
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* 解析本条消息真正可见的用户 ID 列表。
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*
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* @return array<int, int>
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*/
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private function resolveVisibleUserIds(): array
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{
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$userIds = [];
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$fromUser = trim((string) ($this->message['from_user'] ?? ''));
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if ($fromUser !== '') {
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$senderId = User::query()->where('username', $fromUser)->value('id');
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if ($senderId !== null) {
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$userIds[] = (int) $senderId;
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}
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}
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$toUser = trim((string) ($this->message['to_user'] ?? ''));
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if ($toUser !== '' && $toUser !== '大家') {
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$receiverId = User::query()->where('username', $toUser)->value('id');
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if ($receiverId !== null) {
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$userIds[] = (int) $receiverId;
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}
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}
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return array_values(array_unique($userIds));
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}
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}
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