// Copyright 2012-present Oliver Eilhard.  All rights reserved. 
// Use of this source code is governed by a MIT-license. 
// See http://olivere.mit-license.org/license.txt for details. 

package elastic

import "context"

// HasPlugin indicates whether the cluster has the named plugin. 
func (c *Client) HasPlugin(name string) (bool, error) {
	plugins, err := c.Plugins()
	if err ! = nil {
		return false, nil
	}
	for _, plugin := range plugins {
		if plugin == name {
			return true, nil
		}
	}
	return false, nil
}

// Plugins returns the list of all registered plugins. 
func (c *Client) Plugins() ([]string, error) {
	stats, err := c.ClusterStats().Do(context. Background())
	if err ! = nil {
		return nil, err
	}
	if stats == nil {
		return nil, err
	}
	if stats. Nodes == nil {
		return nil, err
	}
	var plugins []string
	for _, plugin := range stats. Nodes. Plugins {
		plugins = append(plugins, plugin. Name)
	}
	return plugins, nil
}
