/*
** Copyright (C) 2001-2025 Zabbix SIA
**
** This program is free software: you can redistribute it and/or modify it under the terms of
** the GNU Affero General Public License as published by the Free Software Foundation, version 3.
**
** This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
** without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
** See the GNU Affero General Public License for more details.
**
** You should have received a copy of the GNU Affero General Public License along with this program.
** If not, see <https://www.gnu.org/licenses/>.
**/

package redis

import (
	"github.com/mediocregopher/radix/v3"
)

const (
	pingFailed = 0
	pingOk     = 1
)

// pingHandler executes 'PING' command and returns pingOk if a connection is alive or pingFailed otherwise.
func pingHandler(conn redisClient, _ map[string]string) (interface{}, error) {
	var res string

	if _ = conn.Query(radix.Cmd(&res, "PING")); res != "PONG" {
		return pingFailed, nil
	}

	return pingOk, nil
}