webman-buildadmin/app/common/service/GameWebSocketDispatcher.php

<?php

declare(strict_types=1);

namespace app\common\service;

use support\Log;
use Throwable;
use Workerman\Connection\TcpConnection;

/**
 * WebSocket 事件分发器（仅 gameWebSocketServer 进程内调用）。
 *
 * 职责：
 * 1. 从 GameWebSocketEventBus 队列消费事件
 * 2. 按 topic 反向索引取出候选 connection_id
 * 3. user 级主题（bet.win / user.streak / wallet.changed / bet.accepted 等）按
 *    data.user_id 与连接绑定 user_id 比对，仅命中本人才下发
 * 4. 每一步都打 ws 日志，便于排查"为什么没收到推送"
 */
final class GameWebSocketDispatcher
{
    /**
     * 这些 topic 的 data.user_id 必须等于连接绑定的 user_id 才会下发；
     * 其它 topic（period.tick / period.opened / jackpot.hit / admin.* 等）一律广播给订阅者。
     *
     * 与 docs/36字花-移动端接口设计草案.md §7.1.2A 保持一致。
     *
     * @var list<string>
     */
    private const USER_SCOPED_TOPICS = [
        'bet.win',
        'user.streak',
        'wallet.changed',
        'bet.accepted',
        'auto.spin.progress',
    ];

    /**
     * 分发单条事件到所有命中的连接。
     *
     * @param array{topic:string, event:string, data:array<string,mixed>, server_time:int} $event
     * @param array<int, TcpConnection> $connections  connection_id => TcpConnection
     */
    public static function dispatch(array $event, array $connections): void
    {
        $topic = $event['topic'] ?? '';
        if (!is_string($topic) || $topic === '') {
            return;
        }

        $candidateIds = GameWebSocketSubscriptionRegistry::connectionsForTopic($topic);
        if ($candidateIds === []) {
            Log::channel('ws')->debug('dispatch skip: no subscriber', [
                'topic' => $topic,
                'queue_server_time' => $event['server_time'] ?? 0,
            ]);
            return;
        }

        $userScoped = in_array($topic, self::USER_SCOPED_TOPICS, true);
        $payloadUserId = 0;
        if ($userScoped) {
            $raw = $event['data']['user_id'] ?? 0;
            $parsed = filter_var($raw, FILTER_VALIDATE_INT);
            $payloadUserId = $parsed === false ? 0 : (int) $parsed;
        }

        $frame = json_encode([
            'event' => $event['event'] ?? $topic,
            'topic' => $topic,
            'data' => $event['data'] ?? [],
            'server_time' => $event['server_time'] ?? time(),
        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        if (!is_string($frame) || $frame === '') {
            Log::channel('ws')->warning('dispatch skip: invalid json frame', [
                'topic' => $topic,
            ]);
            return;
        }

        $matched = 0;
        $skippedNotOwner = 0;
        $skippedClosed = 0;
        $sendFailed = 0;

        foreach ($candidateIds as $cid) {
            if (!isset($connections[$cid])) {
                $skippedClosed++;
                continue;
            }
            if ($userScoped && $payloadUserId > 0) {
                $boundUid = GameWebSocketSubscriptionRegistry::userIdOf($cid);
                if ($boundUid !== $payloadUserId) {
                    $skippedNotOwner++;
                    continue;
                }
            }

            try {
                $connections[$cid]->send($frame);
                $matched++;
            } catch (Throwable $e) {
                $sendFailed++;
                Log::channel('ws')->warning('dispatch send failed', [
                    'topic' => $topic,
                    'connection_id' => $cid,
                    'error' => $e->getMessage(),
                ]);
            }
        }

        Log::channel('ws')->info('dispatch', [
            'topic' => $topic,
            'user_scoped' => $userScoped,
            'payload_user_id' => $payloadUserId,
            'candidates' => count($candidateIds),
            'matched' => $matched,
            'skipped_not_owner' => $skippedNotOwner,
            'skipped_closed' => $skippedClosed,
            'send_failed' => $sendFailed,
            'frame_size' => strlen($frame),
        ]);
    }

    /**
     * 直接向某连接下发单帧（握手回执 / 订阅回执 / pong / 演示帧）。
     */
    public static function sendDirect(TcpConnection $connection, string $event, array $data, string $tag = ''): void
    {
        $frame = json_encode(array_merge([
            'event' => $event,
        ], $data), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        if (!is_string($frame) || $frame === '') {
            return;
        }
        try {
            $connection->send($frame);
            Log::channel('ws')->debug('direct send', [
                'connection_id' => $connection->id,
                'event' => $event,
                'tag' => $tag,
                'frame_size' => strlen($frame),
            ]);
        } catch (Throwable $e) {
            Log::channel('ws')->warning('direct send failed', [
                'connection_id' => $connection->id,
                'event' => $event,
                'tag' => $tag,
                'error' => $e->getMessage(),
            ]);
        }
    }
}