<?php

/*
 * Copyright (C) 2022 Deciso B.V.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

namespace OPNsense\Diagnostics\Api;

use OPNsense\Base\ApiMutableModelControllerBase;
use OPNsense\Core\Backend;
use OPNsense\Core\Config;

class PacketCaptureController extends ApiMutableModelControllerBase
{
    protected static $internalModelName = 'packetcapture';
    protected static $internalModelClass = 'OPNsense\Diagnostics\PacketCapture';
    private static $capture_dir = '/tmp/captures';

    /**
     * set / create capture job
     */
    public function setAction()
    {
        $result = parent::setAction();
        if ($result['result'] != 'failed') {
            $mdl = $this->getModel();
            $result['result'] = 'ok';
            $result['uuid'] = $mdl->settings->generateUUID();
            @mkdir(self::$capture_dir);
            $nodes = $mdl->settings->getNodes();
            foreach ($nodes as $key => $value) {
                if (is_array($value)) {
                    $items = [];
                    foreach ($value as $itemkey => $itemval) {
                        if (!empty($itemval['selected'])) {
                            $items[] = $itemkey;
                        }
                    }
                    $nodes[$key] = implode(',', $items);
                }
            }
            file_put_contents(
                sprintf('%s/%s.json', self::$capture_dir, $result['uuid']),
                json_encode($nodes)
            );
        }
        return $result;
    }

    /**
     * start capture job
     */
    public function startAction($jobid)
    {
        $result = ['status' => 'failed'];
        if ($this->request->isPost()) {
            $payload = json_decode((new Backend())->configdpRun('interface capture start', [$jobid]), true);
            if (!empty($payload)) {
                $result = $payload;
            }
        }
        return $result;
    }

    /**
     * stop capture job
     */
    public function stopAction($jobid)
    {
        $result = ['status' => 'failed'];
        if ($this->request->isPost()) {
            $payload = json_decode((new Backend())->configdpRun('interface capture stop', [$jobid]), true);
            if (!empty($payload)) {
                $result = $payload;
            }
        }
        return $result;
    }

    /**
     * remove capture job
     */
    public function removeAction($jobid)
    {
        $result = ['status' => 'failed'];
        if ($this->request->isPost()) {
            $payload = json_decode((new Backend())->configdpRun('interface capture remove', [$jobid]), true);
            if (!empty($payload)) {
                $result = $payload;
            }
        }
        return $result;
    }

    /**
     * view capture
     */
    public function viewAction($jobid, $detail = 'normal')
    {
        $result = ['status' => 'failed'];
        $payload = json_decode((new Backend())->configdpRun('interface capture view', [$jobid, $detail]), true);
        if (!empty($payload)) {
            $result = $payload;
            if (!empty($result['interfaces'])) {
                $ifnames = [];
                foreach (Config::getInstance()->object()->interfaces->children() as $ifname => $node) {
                    if (!empty((string)$node->descr)) {
                        $ifnames[(string)$node->if] = (string)$node->descr;
                    } else {
                        $ifnames[(string)$node->if] = strtoupper($ifname);
                    }
                }
                foreach ($result['interfaces'] as $key => $data) {
                    $result['interfaces'][$key]['name'] = !empty($ifnames[$key]) ? $ifnames[$key] : "";
                }
            }
        }
        return $result;
    }

    /**
     * download pcap(s)
     */
    public function downloadAction($jobid)
    {
        $payload = json_decode((new Backend())->configdpRun('interface capture archive', [$jobid]), true);
        if (!empty($payload) && !empty($payload['filename'])) {
            $this->response->setContentType('application/octet-stream');
            $this->response->setRawHeader("Content-Disposition: attachment; filename=" . basename($payload['filename']));
            $this->response->setRawHeader("Content-length: " . filesize($payload['filename']));
            $this->response->setRawHeader("Pragma: no-cache");
            $this->response->setRawHeader("Expires: 0");
            $this->response->setContent(fopen($payload['filename'], 'r'), true);
        }
    }

    /**
     * fetch mac info
     */
    public function macInfoAction($macaddr)
    {
        $result = ['status' => 'failed'];
        $payload = json_decode((new Backend())->configdpRun('interface capture macinfo', [$macaddr]), true);
        if (!empty($payload)) {
            return $payload;
        }
        return $result;
    }

    /**
     * search current capture jobs
     */
    public function searchJobsAction()
    {
        $data = json_decode((new Backend())->configdRun('interface capture list'), true);
        $records = (!empty($data) && !empty($data['jobs'])) ? $data['jobs'] : [];
        return $this->searchRecordsetBase($records);
    }
}
