wangjia
6da6964451
- Go/Gin/GORM + 纯 Go SQLite（无 cgo） - Channel 多渠道接口：支付宝当面付(precreate)/电脑网站支付(page.pay) 已实现，微信占位 - 多商户 merchants 表，回调验签+金额核对+幂等+查单兜底 - 收款页/结果页/二维码端点；docs/ 设计文档与部署 Runbook - 密钥走环境变量/Bitwarden，不入库 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
package channel
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import (
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"fmt"
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"sync"
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"gorm.io/gorm"
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"github.com/wangjia/pay/internal/model"
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)
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// Registry 按商户缓存已构造的渠道实例，避免每次下单都重新加载密钥。
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type Registry struct {
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db *gorm.DB
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mu sync.RWMutex
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cache map[uint64]Channel
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}
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func NewRegistry(db *gorm.DB) *Registry {
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return &Registry{db: db, cache: make(map[uint64]Channel)}
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}
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// ByMerchantID 取（或构造）指定商户的渠道。
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func (r *Registry) ByMerchantID(id uint64) (Channel, *model.Merchant, error) {
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var m model.Merchant
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if err := r.db.First(&m, "id = ? AND enabled = ?", id, true).Error; err != nil {
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return nil, nil, fmt.Errorf("商户不存在或已停用: %w", err)
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}
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ch, err := r.get(&m)
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return ch, &m, err
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}
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// AlipayByAppID 异步回调时用 app_id 反查商户并取其渠道（用于验签）。
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func (r *Registry) AlipayByAppID(appID string) (Channel, *model.Merchant, error) {
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if appID == "" {
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return nil, nil, fmt.Errorf("回调缺少 app_id")
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}
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var m model.Merchant
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if err := r.db.First(&m, "channel = ? AND app_id = ? AND enabled = ?", "alipay", appID, true).Error; err != nil {
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return nil, nil, fmt.Errorf("找不到 app_id=%s 对应的支付宝商户: %w", appID, err)
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}
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ch, err := r.get(&m)
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return ch, &m, err
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}
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func (r *Registry) get(m *model.Merchant) (Channel, error) {
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r.mu.RLock()
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if ch, ok := r.cache[m.ID]; ok {
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r.mu.RUnlock()
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return ch, nil
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}
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r.mu.RUnlock()
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ch, err := Build(m)
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if err != nil {
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return nil, err
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}
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r.mu.Lock()
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r.cache[m.ID] = ch
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r.mu.Unlock()
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return ch, nil
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}
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// Invalidate 商户凭证变更后清缓存（预留给管理接口）。
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func (r *Registry) Invalidate(id uint64) {
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r.mu.Lock()
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delete(r.cache, id)
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r.mu.Unlock()
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}
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