middleware.go

package chevron

import (
	"context"
	"net/http"

	"github.com/efritz/response"
	"github.com/go-nacelle/nacelle"
)

type (
	// Handler converts an HTTP request into a response object. The handler
	// also has access to a request context populated by the router and
	// registered middleware as well as a request logger which may also be
	// decorated by registered middleware.
	Handler func(context.Context, *http.Request, nacelle.Logger) response.Response

	// Middleware transforms a handler into another decorated handler.
	Middleware interface {
		// Convert applies the middleware transformation to a handler. If
		// the middleware is supplied invalid arguments it may return an
		// error at the time of decoration.
		Convert(Handler) (Handler, error)
	}

	// MiddlewareFunc is signature for single-function middleware.
	MiddlewareFunc func(Handler) (Handler, error)
)

func (f MiddlewareFunc) Convert(h Handler) (Handler, error) {
	return f(h)
}