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/infinity/old/lulu/backup.php

<?php
declare(strict_types=1);
require __DIR__ . '/lib.php';

$c = cfg();
ensure_dirs();

$secret = admin_secret();
$key = trim((string)($_SERVER['HTTP_X_LULU_KEY'] ?? ''));

if (!$secret || !$key || !hash_equals($secret, $key)) {
  log_audit('backup_forbidden');
  json_out(['ok'=>false,'error'=>'Forbidden'], 403);
}

$logsDir = (string)$c['paths']['logs_dir'];
$backupsDir = (string)$c['paths']['backups_dir'];
$cfgDir = (string)$c['paths']['cfg_dir'];

$ts = gmdate('Y-m-d_His');
$name = "lulu_backup_{$ts}.zip";
$zipPath = $backupsDir . '/' . $name;

if (!class_exists('ZipArchive')) json_out(['ok'=>false,'error'=>'ZipArchive missing'], 500);

$zip = new ZipArchive();
if ($zip->open($zipPath, ZipArchive::CREATE) !== true) json_out(['ok'=>false,'error'=>'Cannot create zip'], 500);

// logs
foreach (['lulu.ndjson','lulu_errors.ndjson','lulu_audit.ndjson','lulu_perf.ndjson'] as $f) {
  $p = $logsDir . '/' . $f;
  if (is_file($p)) $zip->addFile($p, "logs/{$f}");
}

// config + key placeholder (NOT the secret itself)
$zip->addFile(__DIR__ . '/config.php', 'app/config.php');
$zip->addFile(__DIR__ . '/lib.php', 'app/lib.php');
$zip->addFile(__DIR__ . '/index.php', 'app/index.php');
$zip->addFile(__DIR__ . '/api.php', 'app/api.php');
$zip->addFile(__DIR__ . '/health.php', 'app/health.php');

$zip->close();

// rotate older backups
$keep = (int)($c['admin']['backup_keep'] ?? 14);
$files = glob($backupsDir . '/lulu_backup_*.zip') ?: [];
rsort($files);
for ($i=$keep; $i<count($files); $i++) @unlink($files[$i]);

log_audit('backup_now', ['file'=>$name]);

json_out(['ok'=>true,'file'=>$name,'path'=>basename($zipPath)]);

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