webhooks

type Event[T any] struct {
	Payload T
	RawBody []byte
	Request *http.Request
}

type HMACConfig struct {
	Secret     []byte
	HeaderName string
	Encoding   SignatureEncoding
	Prefix     string
}

type HMACSignerConfig struct {
	Secret   []byte
	Encoding SignatureEncoding
	Prefix   string
}

type OutgoingEvent[T any] struct {
	ID      string `json:"id"`
	Type    string `json:"type,omitempty"`
	Payload T      `json:"payload,omitempty"`
}

type Receiver[T any] struct {
	Config ReceiverConfig[T]
}

type ReceiverConfig[T any] struct {
	Verifier     Verifier
	MaxBodyBytes int64
	Decode       func([]byte) (T, error)
	Handle       func(context.Context, Event[T]) error
	ErrorWriter  func(http.ResponseWriter, int, httpx.Problem)
}

type SignatureEncoding int

type SignedRequestConfig struct {
	Method          string
	URL             string
	Signer          Signer
	EventID         string
	Timestamp       time.Time
	SignatureHeader string
	EventIDHeader   string
	TimestampHeader string
	ContentType     string
	Headers         http.Header
}

type Signer interface {
	SignWebhook(ctx context.Context, body []byte) (string, error)
}

type SignerFunc func(context.Context, []byte) (string, error)

type Verifier interface {
	VerifyWebhook(ctx context.Context, r *http.Request, body []byte) error
}

type VerifierFunc func(context.Context, *http.Request, []byte) error