215 lines
8.8 KiB
PHP
215 lines
8.8 KiB
PHP
<?php
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namespace app\common\service;
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use app\common\model\account\TransferAuthorizations;
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use app\common\traits\ServiceTrait;
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use think\Log;
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/**
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* 免确认收款授权（商家转账-用户确认模式的前置授权）
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* 流程：
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* 1. 用户发起提现时，前端调本服务 apply() 发起授权申请，
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* 拿到 package_info 后用 wx.requestMerchantTransfer 拉起授权页；
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* 2. 用户授权成功后，微信异步回调 transferAuthorizationNotify，
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* 本服务记录 authorization_id 并将状态置为 TAKING_EFFECT；
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* 3. 后台审核提现时，校验授权为 TAKING_EFFECT 后走
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* /v3/fund-app/mch-transfer/transfer-bills/transfer 完成免确认转账。
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* 文档：https://pay.weixin.qq.com/doc/v3/merchant/4015901167
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*/
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class TransferAuthorizationService
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{
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use ServiceTrait;
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/** @var TransferAuthorizations */
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public static $Model = TransferAuthorizations::class;
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// 授权状态（与微信查询授权单接口 state 取值一致）
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const STATE_WAIT_USER_CONFIRM = 'WAIT_USER_CONFIRM'; //已受理，待用户确认
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const STATE_TAKING_EFFECT = 'TAKING_EFFECT'; //已授权，生效中（长期有效，直至主动解除）
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const STATE_CLOSED = 'CLOSED'; //已关闭，无法转账至该授权对应的用户
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/**
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* 生成商户侧授权单号：一个用户固定一个单号。
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* 微信规则：未确认的授权单 30 天后单号可复用重新发起，因此复用同一单号即可
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* @param int $userId
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* @return string 仅含字母数字，最长 32 位
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*/
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public static function generateAuthNo($userId): string
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{
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return 'TXAUTH' . str_pad((string)intval($userId), 10, '0', STR_PAD_LEFT);
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}
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/**
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* 生成新的商户侧授权单号：授权已被关闭/解除时使用。
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* 微信仅明确“未确认的授权单 30 天后单号可复用”，已确认后又被关闭的单号复用存在失败风险，
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* 因此关闭后重新授权使用全新单号（原单号 ≤22 位，仍满足 32 位、字母数字限制）
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* @param int $userId
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* @return string
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*/
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public static function generateAuthNoUnique($userId): string
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{
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return self::generateAuthNo($userId) . strtoupper(substr(md5(uniqid('', true)), 0, 6));
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}
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/**
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* 获取用户的授权记录
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* @param int $userId
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* @return TransferAuthorizations|null
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*/
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public static function getByUserId($userId)
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{
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//优先取生效中的授权记录（历史被关闭的记录仍保留，故按状态+时间取最新的）
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$record = self::getOne(['user_id' => $userId, 'state' => self::STATE_TAKING_EFFECT], [], ['id', 'desc']);
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return $record ?: self::getOne(['user_id' => $userId], [], ['id', 'desc']);
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}
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/**
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* 用户是否已完成免确认收款授权
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* @param int $userId
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* @return bool
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*/
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public static function isAuthorized($userId): bool
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{
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$record = self::getByUserId($userId);
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//授权生效后即可凭 out_authorization_no 发起免确认转账；authorization_id 仅作留存
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return $record && $record->state == self::STATE_TAKING_EFFECT;
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}
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/**
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* 发起/获取免确认收款授权，供前端拉起授权页
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* @param \app\common\model\Users $user 用户（需含 openid）
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* @param string $displayName 授权详情中展示的开通账号名称
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* @return array {authorized: bool, state, package_info?, mch_id?, app_id?}
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* @throws \Exception
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*/
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public static function apply($user, string $displayName = ''): array
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{
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$userId = $user->id;
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if (empty($user->openid)) {
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throw new \Exception('无法获取用户微信身份，请先登录小程序');
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}
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$authNo = self::generateAuthNo($userId);
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$wechat = new EasyWeChatService();
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//每次提现前都回查微信侧最新授权状态并同步到本地：
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//授权生效后长期有效(TAKING_EFFECT)，但用户可能在微信端主动解除授权，
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//只看本地记录会导致解除后仍按已授权放行，直到后台转账失败才暴露
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$query = $wechat->queryTransferAuthorization($authNo);
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$queryState = (string)($query['state'] ?? '');
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if ($queryState !== '') {
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self::saveAuthorization($userId, $authNo, $queryState, $query['authorization_id'] ?? '');
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if ($queryState === self::STATE_TAKING_EFFECT) {
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return [
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'authorized' => true,
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'state' => $queryState,
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];
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}
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}
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//未生效：发起授权申请（未确认的单号可复用重新发起）
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//CLOSED(用户或商户已关闭) 时复用原单号存在发起失败风险，改用全新单号并新建记录
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$forceCreate = ($queryState === self::STATE_CLOSED);
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if ($forceCreate) {
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$authNo = self::generateAuthNoUnique($userId);
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}
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$displayName = mb_substr($displayName ?: ($user->nickname ?: ('用户' . $userId)), 0, 32);
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$res = $wechat->applyTransferAuthorization($authNo, $user->openid, $displayName);
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if (empty($res['package_info'])) {
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//package 仅在授权状态为 WAIT_USER_CONFIRM 时返回，拿不到时透出微信返回的错误信息
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throw new \Exception($res['message'] ?? ($query['message'] ?? '发起免确认收款授权失败'));
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}
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//保存/更新授权记录（package_info 用于前端拉起授权页，state 当前为待用户确认）
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self::saveAuthorization(
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$userId,
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$authNo,
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$res['state'] ?? self::STATE_WAIT_USER_CONFIRM,
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'',
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$res['package_info'],
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$forceCreate
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);
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return [
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'authorized' => false,
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'state' => $res['state'] ?? self::STATE_WAIT_USER_CONFIRM,
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'package_info' => $res['package_info'],
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//前端 wx.requestMerchantTransfer 需要：商户号 + AppID + package
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'mch_id' => (string)$wechat->payApp->getMerchant()->getMerchantId(),
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'app_id' => $wechat->config['app_id'],
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];
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}
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/**
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* 保存/更新授权记录
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* @param int $userId
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* @param string $authNo 商户侧授权单号
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* @param string $state 授权状态
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* @param string $authorizationId 微信侧授权单号(可为空)
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* @param string $packageInfo 拉起授权页的 package(可为空)
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* @param bool $forceCreate 是否强制新建记录(授权单已关闭换新单号时使用)
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* @return void
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*/
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private static function saveAuthorization($userId, string $authNo, string $state, string $authorizationId = '', string $packageInfo = '', bool $forceCreate = false)
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{
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$record = $forceCreate ? null : self::getByUserId($userId);
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$data = ['state' => $state];
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if ($authorizationId !== '') {
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$data['authorization_id'] = $authorizationId;
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}
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if ($packageInfo !== '') {
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$data['package_info'] = $packageInfo;
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}
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if ($record) {
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$record->save($data);
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return;
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}
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self::create(array_merge([
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'user_id' => $userId,
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'out_authorization_no' => $authNo,
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'authorization_id' => $authorizationId,
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'package_info' => $packageInfo,
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], $data));
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}
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/**
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* 处理免确认收款授权结果回调（用户授权成功后微信异步通知）
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* @param array $message 解密后的授权结果，含 out_authorization_no / authorization_id / state
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* @return bool
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*/
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public static function handleAuthorizationNotify(array $message): bool
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{
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$outAuthNo = trim((string)($message['out_authorization_no'] ?? ''));
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$authorizationId = trim((string)($message['authorization_id'] ?? ''));
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$state = trim((string)($message['state'] ?? ''));
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if (!$outAuthNo || !$authorizationId) {
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Log::error('免确认收款授权回调参数缺失:' . json_encode($message, JSON_UNESCAPED_UNICODE));
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return false;
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}
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$record = self::getOne(['out_authorization_no' => $outAuthNo]);
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if (!$record) {
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Log::error('免确认收款授权回调找不到授权记录:' . $outAuthNo);
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return false;
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}
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//记录微信侧授权单号，标记授权生效（授权长期有效，直至用户或商户主动解除）
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$record->authorization_id = $authorizationId;
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$record->state = $state ?: self::STATE_TAKING_EFFECT;
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$record->save();
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Log::info('免确认收款授权生效:' . json_encode([
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'user_id' => $record->user_id,
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'state' => $record->state,
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], JSON_UNESCAPED_UNICODE));
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return true;
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}
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}
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