public function upToDate($pageSize)
{
$this->lazyLoad();
return $this->item->getSrcModTime() === File::modTime($this->fileName) && $pageSize === $this->item->getPageSize();
}
private function createCache()
{
$lineNumber = 1;
$pos = [0];
$handler = $this->handler->getFileHandler();
while (fgets($handler, 8196) !== false) {
if ($lineNumber % $this->pageSize === 0) {
$pos[] = ftell($handler);
}
$lineNumber++;
}
if (count($pos) === 1) {
$this->pageSize = $lineNumber - 1;
}
array_push($pos, File::size($this->getFileName()));
$item = new CacheItem($pos, File::modTime($this->getFileName()), $this->pageSize);
$this->cache->create($item);
}