<?php

// Proxy for requests to Arema because of CORS limitations

const AREMA_URL = 'http://arema01as.tv.asinfra.net:9090';
const AREMA_USERNAME = 'dmae';
const AREMA_PASSWORD = 'admira';
const CACHE_DIR = 'cache';
const CACHE_SECONDS = 2;

$ctx = stream_context_create([
    'http' => [
        'method' => 'GET',
        'header' => ['Accept: application/json'],
    ],
]);

// default parameters for all requests
$params = [
    'userid' => AREMA_USERNAME,
    'password' => AREMA_PASSWORD,
    'encrypted' => 'false',
];

// request-specific handling
switch ($_GET['fetch']) {
    default:
    case 'joblist':
        $url = AREMA_URL . '/rest/jobs';
        $params['limit'] = 50;
        $params['order_by'] = 'job_id_desc';
        $params['history'] = 'false';
        if (isset($_GET['q']) && strlen($_GET['q']) > 0 && $_GET['q'] != 'null') {
            $params['text'] = $_GET['q'];
        }
        break;

    case 'jobdetails':
        $url = AREMA_URL . '/rest/jobs/' . intval($_GET['jobid']);
        break;

    case 'jobprogress':
        $url = AREMA_URL . '/rest/jobs/' . intval($_GET['jobid']) . '/progress';
        break;
}

$params_encoded = [];
foreach ($params as $k => $v) {
    $params_encoded[] = $k . '=' . rawurlencode($v);
}
$params_str = implode('&', $params_encoded);
$url .= '?' . $params_str;
$cache_token = sha1($url);

// Clean cache
$cached_files = glob(CACHE_DIR . '/*');
foreach ($cached_files as $f) {
    $mtime = filemtime($f);
    if ((time() - $mtime) > CACHE_SECONDS) {
        // cached file outdated --> delete
        unlink($f);
    }
}

$cache_file = CACHE_DIR . '/' . $cache_token;
if (file_exists($cache_file)) {
    // Get cached data
    $data = file_get_contents($cache_file);
} else {
    // Query Arema
    $data = file_get_contents($url, false, $ctx);

    // Cache answer
    file_put_contents($cache_file, $data);
}

// Output JSON
header('Content-Type: application/json');
echo $data;