<?php
function endsWith( $haystack, $needle ) {
    $length = strlen( $needle );
    if( !$length ) {
        return true;
    }
    return substr( $haystack, -$length ) === $needle;
}

$baseFile = basename(__FILE__);
$scriptName = $_SERVER['SCRIPT_NAME'];
if(!endsWith($scriptName, $baseFile)){
    return;//혹시나 의도와 다르게 php파일을 부르는 경우를 막기 위해..
}

define("__ZBXE__",true);
define("__XE__",true);
mb_internal_encoding("UTF-8");
mb_regex_encoding("UTF-8");

const SESSION_KEY = "hash 값으로 사용할 아무 문자열, 영문자 적당히 섞어서 16글자쯤";

const XE_PATH = "../xe/config/config.inc.php";//config.inc.php가 있는 경로, rhymix일 수도 있다.

$time = $_REQUEST['time']??'';
$hash = $_REQUEST['hash']??'';

if(!$time || !$hash){
    die(json_encode([
        'result'=>false,
        'reason'=>'invalid input'
    ]));
}


$myTime = time();
$srcTime = intval($time);

if(abs($myTime - $srcTime) >= 2){
    die(json_encode([
        'result'=>false,
        'reason'=>'invalid time'
    ]));
}

header("Content-Type: application/json");
if(!file_exists(XE_PATH)){
    die(json_encode([
        'result'=>false,
        'reason'=>'no path'
    ]));
}

if(hash('sha256', SESSION_KEY.$time, false) != $hash){
    die(json_encode([
        'result'=>false,
        'reason'=>'invalid session hash'
    ]));
}

require(XE_PATH);
if (!class_exists('Context')) {
    die(json_encode([
        'result'=>false,
        'reason'=>'No XE Context'
    ]));
}

$oContext = \Context::getInstance();
$oContext->init();
$logged_info = $oContext->get("logged_info");
if(!$logged_info){
    die(json_encode([
        'result'=>true,
        'user_id'=>null,
        'name'=>null,
        'mail'=>null,
        'grps'=>null,
    ]));
}
die(json_encode([
    'result'=>true,
    'user_id'=>$logged_info->user_id,
    'name'=>$logged_info->nick_name,
    'mail'=>$logged_info->email_address,
    'grps'=> @array_values(@array_filter($logged_info->group_list))
]));