function ExportContest(&$arg)
{
$cid = safefetch($arg, 'cid');
$contest = new ContestsTbl($cid);
$contest->Get() or error("Invalid cid");
$contest = $contest->detail;
$zip = new ZipArchive();
$filename = tempnam(sys_get_temp_dir(), "export_contest") . '.zip';
if (!$zip->open($filename, ZIPARCHIVE::CREATE)) {
error("Error creating archive file");
}
$cpids = get_cpids($cid);
$problem_files = array();
foreach ($cpids as $pid => $cpid) {
$file_path = ExportProblem2File($pid);
if (!$zip->addFile($file_path, "{$cpid}.zip")) {
error("Error adding file [{$cpid}.zip]");
}
$problem_files[] = $file_path;
}
if (!$zip->addFromString('metadata.json', json_encode(array_values($cpids)))) {
error("Error writing meta data");
}
if (!$zip->addFromString('.SET', date(DATE_W3C))) {
error("Error writing .SET file");
}
if (!$zip->close()) {
error("Error compressing");
}
foreach ($problem_files as $file_path) {
unlink($file_path);
}
output_file($filename, "{$cid} - {$contest['title']}.zip");
}
/**
* Get a pid list for a particular contest
* @param type $cid contest id
* @return array pid list
*/
function get_pids($cid)
{
$cpids = get_cpids($cid);
return array_keys($cpids);
}
