<?php include 'functions.php'; ?>

<?php
$user = $_GET['user'] ?? '';
$project = $_GET['project'] ?? '';

if (!$user || !$project || !array_key_exists($user, getUsers())) {
    http_response_code(404);
    echo 'Invalid user or project.';
    exit;
}

$projectDir = USERS_DIR . $user . '/' . $project;
if (!file_exists($projectDir) || !is_dir($projectDir)) {
    http_response_code(404);
    echo 'Project not found.';
    exit;
}

$zipFile = tempnam(sys_get_temp_dir(), 'project_') . '.zip';
$zip = new ZipArchive();
if ($zip->open($zipFile, ZipArchive::CREATE | ZipArchive::OVERWRITE) !== true) {
    echo 'Failed to create ZIP file.';
    exit;
}

function addDirToZip($zip, $dir, $rootPath) {
    $files = scandir($dir);
    foreach ($files as $file) {
        if ($file != '.' && $file != '..') {
            $path = $dir . '/' . $file;
            $relPath = substr($path, strlen($rootPath) + 1);
            if (is_dir($path)) {
                $zip->addEmptyDir($relPath);
                addDirToZip($zip, $path, $rootPath);
            } else {
                $zip->addFile($path, $relPath);
            }
        }
    }
}

addDirToZip($zip, $projectDir, $projectDir);
$zip->close();

header('Content-Type: application/zip');
header('Content-Disposition: attachment; filename="' . $project . '.zip"');
header('Content-Length: ' . filesize($zipFile));
readfile($zipFile);

unlink($zipFile);
exit;
?>