/*
Copyright 2017 Gravitational, Inc.

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 auth

import (
	"sync"
)

var pluginMutex = &sync.Mutex{}
var plugin Plugin

// GetPlugin returns auth API server plugin that allows injecting handlers
func GetPlugin() Plugin {
	pluginMutex.Lock()
	defer pluginMutex.Unlock()
	return plugin
}

// SetPlugin sets plugin for the auth API server
func SetPlugin(p Plugin) {
	pluginMutex.Lock()
	defer pluginMutex.Unlock()
	plugin = p
}

// Plugin is auth API server extension setter
type Plugin interface {
	// AddHandlers adds handlers to the auth API server
	AddHandlers(srv *APIServer)
}