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106 lines
2.8 KiB
106 lines
2.8 KiB
package paypal
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import (
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"context"
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"errors"
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"sync"
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)
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type (
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// App端需要的关键参数（示例：返回订单ID与跳转链接）
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AppPayParams struct {
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OrderID string `json:"order_id"`
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ApproveLink string `json:"approve_link"`
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}
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ISys interface {
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GenerateOrderNo(prefix string) string
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CreateAppOrder(ctx context.Context, outTradeNo string, totalFee int64, description string, return_url string, cancel_url string) (result string, err error)
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CaptureOrder(ctx context.Context, orderID string) (result string, err error)
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VerifyWebhook(headers map[string]string, body []byte) (bool, error)
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}
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)
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// defsys 由 OnInit(启动) 与 Reload(运行时热更) 写、各包级函数读，故必须加锁：
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// 无锁并发读写接口值是 data race。
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var (
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mu sync.RWMutex
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defsys ISys
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)
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// ErrNotInited PayPal 未初始化。OnInit 失败时调用方可选择降级；此时包级函数返回本错误，而不是 panic。
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var ErrNotInited = errors.New("paypal 未初始化：配置缺失或凭据加载失败")
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func get() ISys {
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mu.RLock()
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defer mu.RUnlock()
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return defsys
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}
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func set(sys ISys) {
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mu.Lock()
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defsys = sys
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mu.Unlock()
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}
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func OnInit(config map[string]interface{}, option ...Option) error {
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sys, err := newSys(newOptions(config, option...))
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if err != nil {
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// 出错时不要给 defsys 赋值，避免「非 nil 接口 + nil 指针」让守卫失效。
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return err
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}
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set(sys)
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return nil
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}
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// Reload 运行时热替换 PayPal 客户端（console 后台改配置后由业务侧调用）。
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// 配置不合法时返回 error 且**保留原客户端不动**；启动时未初始化的场景下，
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// 后台首次配好凭据即经此启用，无需重启。
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func Reload(config map[string]interface{}, option ...Option) error {
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sys, err := newSys(newOptions(config, option...))
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if err != nil {
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return err
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}
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set(sys)
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return nil
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}
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func NewSys(option ...Option) (ISys, error) {
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sys, err := newSys(newOptionsByOption(option...))
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if err != nil {
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return nil, err
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}
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return sys, nil
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}
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func GenerateOrderNo(prefix string) string {
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sys := get()
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if sys == nil {
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return ""
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}
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return sys.GenerateOrderNo(prefix)
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}
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func CreateAppOrder(ctx context.Context, outTradeNo string, totalFee int64, description string, return_url string, cancel_url string) (result string, err error) {
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sys := get()
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if sys == nil {
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return "", ErrNotInited
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}
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return sys.CreateAppOrder(ctx, outTradeNo, totalFee, description, return_url, cancel_url)
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}
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func CaptureOrder(ctx context.Context, orderID string) (result string, err error) {
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sys := get()
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if sys == nil {
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return "", ErrNotInited
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}
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return sys.CaptureOrder(ctx, orderID)
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}
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func VerifyWebhook(headers map[string]string, body []byte) (bool, error) {
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sys := get()
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if sys == nil {
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return false, ErrNotInited
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}
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return sys.VerifyWebhook(headers, body)
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}
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