efritz/chevron

package chevron

import (
    "context"
    "net/http"

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

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)
}