<?php

/**
 * output.php
 *
 * runs the requested command and outputs as a file or json
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * @link       https://www.librenms.org
 *
 * @copyright  2016 Tony Murray
 * @author     Tony Murray <murraytony@gmail.com>
 */

use App\Facades\DeviceCache;
use App\Facades\LibrenmsConfig;

if (\Illuminate\Support\Facades\Gate::denies('debug', \App\Models\Device::class)) {
    echo 'Insufficient Privileges';
    exit;
}

$hostname = escapeshellcmd($_REQUEST['hostname']);
$type = $_REQUEST['type'];

switch ($type) {
    case 'poller':
        $cmd = ['php', \App\Facades\LibrenmsConfig::get('install_dir') . '/lnms', 'device:poll', $hostname, '--no-data', '-vv'];
        $filename = "poller-$hostname.txt";
        break;
    case 'snmpwalk':
        $device = DeviceCache::getByHostname($hostname);

        $cmd = gen_snmpwalk_cmd($device, '.', '-OUneb');

        $filename = $device->os . '-' . $device->hostname . '.snmpwalk';
        break;
    case 'discovery':
        $cmd = ['php', \App\Facades\LibrenmsConfig::get('install_dir') . '/lnms', 'device:discover', $hostname, '-vv'];
        $filename = "discovery-$hostname.txt";
        break;
    default:
        echo 'You must specify a valid type';
        exit;
}

// ---- Output ----
$proc = new \Symfony\Component\Process\Process($cmd);
$proc->setTimeout(LibrenmsConfig::get('snmp.exec_timeout', 1200));

if ($_GET['format'] == 'text') {
    header('Content-type: text/plain');
    header('X-Accel-Buffering: no');

    $proc->run(function ($type, $buffer): void {
        echo preg_replace('/\033\[[\d;]+m/', '', (string) $buffer) . PHP_EOL;
        ob_flush();
        flush(); // you have to flush buffer
    });
} elseif ($_GET['format'] == 'download') {
    $proc->run();
    $output = $proc->getOutput();

    $output = preg_replace('/\033\[[\d;]+m/', '', $output);

    file_download($filename, $output);
}
