<?php

/**
 * Namespace for classes and functions related to managing services.
 * @package NAE\Service
 */
namespace NAE\Service;


/**
 * Systemctl Service Management Interface
 * @author "Marcel Naeve" <php@naeve.info>
 * @license MIT License (http://www.opensource.org/licenses/mit)
 */
class Systemctl {

    /**
     * @var string Name of the service to manage
     */
    private $service_name = "";

    /**
     * Constructor
     *
     * @param string $service_name Name of the service to manage
     */
    public function __construct(string $service_name) {
        $this->service_name = $service_name;
    }

    /**
     * Start the Service
     * 
     * @return bool True if the service was started successfully, false otherwise
     */
    public function start () : bool {
        exec("systemctl start ".$this->service_name." > /dev/null", $output, $return);
        return ( $return === 0 );
    }

    /**
     * Stop the Service
     * 
     * @return bool True if the service was stopped successfully
     */
    public function stop () : bool {
        exec("systemctl stop ".$this->service_name." > /dev/null", $output, $return);
        return ( $return === 0 );
    }

    /**
     * Restart the Service
     * 
     * @return bool True if the service was restarted successfully, false otherwise
     */
    public function restart () : bool {
        exec("systemctl restart ".$this->service_name." > /dev/null", $output, $return);
        return ( $return === 0 );
    }

    /**
     * Check if the Service is running
     * 
     * @return bool True if the service is running, false otherwise
     */
    public function isRunning () : bool {

        exec("systemctl status ".$this->service_name, $output, $return);

        $search_string = implode(";", $output);
        return ( strpos($search_string, "Active: active (running)") >= 0 );

    }

}