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chatroom/app/Console/Commands/ClearRoomOnlineCache.php

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<?php
/**
* 文件功能:清理房间在线名单的 Redis 缓存
* 用于清除历史遗留的「幽灵在线」脏数据
*
* 执行方式php artisan room:clear-online-cache
*
* @author ChatRoom Laravel
*
* @version 1.0.0
*/
namespace App\Console\Commands;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Redis;
class ClearRoomOnlineCache extends Command
{
/**
* Artisan 命令名称
*
* @var string
*/
protected $signature = 'room:clear-online-cache';
/**
* 命令描述
*
* @var string
*/
protected $description = '清空所有房间的 Redis 在线名单(清除幽灵在线脏数据)';
/**
* 执行命令
*
* 扫描所有 room:*:users Redis Key 并删除,让用户重新进房时写入干净数据。
*/
public function handle(): int
{
$prefix = config('database.redis.options.prefix', '');
$cursor = '0';
$cleaned = 0;
$this->info("Redis 前缀:\"{$prefix}\"");
$this->info('开始扫描 room:*:users ...');
do {
[$cursor, $keys] = Redis::scan($cursor, ['match' => $prefix.'room:*:users', 'count' => 100]);
foreach ($keys ?? [] as $fullKey) {
// 去掉 Redis 前缀,还原为 Laravel Facade 使用的短 Key
$shortKey = $prefix ? substr($fullKey, strlen($prefix)) : $fullKey;
Redis::del($shortKey);
$this->line(" ✓ 已清除:{$shortKey}");
$cleaned++;
}
} while ($cursor !== '0');
$this->info("完成!共清理 {$cleaned} 个房间的在线名单。");
$this->info('用户下次进房会重新写入正确数据,人数从 0 开始准确累计。');
return self::SUCCESS;
}
}