// Copyright 2016 IBM Corporation
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.

package middleware

import (
	"context"

	"github.com/ant0ine/go-json-rest/rest"

	"github.com/amalgam8/amalgam8/registry/server/env"
)

// ContextMiddleware initializes a context and puts it in the request's env map
type ContextMiddleware struct{}

// MiddlewareFunc makes ContextMiddleware implement the Middleware interface.
func (mw *ContextMiddleware) MiddlewareFunc(h rest.HandlerFunc) rest.HandlerFunc {
	return func(w rest.ResponseWriter, r *rest.Request) {
		r.Env[env.Context] = context.Background()

		// Handle the request
		h(w, r)
	}
}
