private static function updateCache(callback $callback = null)
{
$cache = base::expand('app:/cache/geonames/');
if (!file_exists($cache)) {
mkdir($cache, 0777, true);
}
$db = new DatabaseConnection();
// Pull the list of countries to update
$rs = $db->getRows("SELECT * FROM geonames_datasets WHERE active=1");
foreach ($rs as $ci) {
$download = false;
if (!file_exists($cache . $ci['setkey'] . '.gz')) {
$download = true;
} else {
$file = new HttpRequest($ci['url'], $cache . $ci['setkey'] . '.zip', array('method' => 'head'));
$hdr = $file->headers();
$etaglocal = file_get_contents($cache . $ci['setkey'] . '.etag');
$etagremote = $hdr['ETag'];
if ($etaglocal != $etagremote) {
$download = true;
}
}
if ($download) {
cb($callback, 'Downloading ' . $ci['url'], 0, 1);
$file = new HttpDownload($ci['url'], $cache . $ci['setkey'] . '.zip');
$hdr = $file->headers();
file_put_contents($cache . $ci['setkey'] . '.etag', $hdr['ETag']);
cb($callback, 'Recompressing ' . $ci['setkey'] . '.gz', 0, 1);
// Open input stream
$fin = fopen('zip://' . $cache . $ci['setkey'] . '.zip#' . $ci['setkey'] . '.txt', 'r');
$fout = fopen('compress.zlib://' . $cache . $ci['setkey'] . '.gz', 'w');
stream_copy_to_stream($fin, $fout);
fclose($fin);
fclose($fout);
cb($callback, 'Saved ' . $ci['setkey'] . '.gz');
}
}
// Update hierarchy
$url = self::getUrl('hierarchy.zip');
if (file_exists($cache . 'hierarchy.etag')) {
$hetag = file_get_contents($cache . 'hierarchy.etag');
} else {
$hetag = null;
}
cb($callback, 'Updating hierarchy...', 0, 1);
$head = new HttpRequest($url, array('method' => 'head'));
$headers = $head->headers();
if ($hetag != $headers['ETag']) {
file_put_contents($cache . 'hierarchy.etag', $headers['ETag']);
$file = new HttpDownload($url, $cache . 'hierarchy.zip');
}
// Open input stream
$fin = fopen('zip://' . $cache . 'hierarchy.zip#hierarchy.txt', 'r');
$fout = fopen('compress.zlib://' . $cache . 'hierarchy.gz', 'w');
stream_copy_to_stream($fin, $fout);
fclose($fin);
fclose($fout);
cb($callback, 'Saved hierarchy...');
}
