/*
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 web

import (
	"sync"
)

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

// GetPlugin returns web API plugin that
func GetPlugin() Plugin {
	pluginMutex.Lock()
	defer pluginMutex.Unlock()
	return plugin
}

// SetPlugin sets plugin for the web handler
func SetPlugin(p Plugin) {
	pluginMutex.Lock()
	defer pluginMutex.Unlock()
	plugin = p
}

// Plugin is API Server extension setter
// if set, it will add handler methods during web handler initialization
type Plugin interface {
	// AddHandlers adds handlers to the web API handler
	AddHandlers(h *Handler)
}