/**
* @param Iterator $iterator
*
* @return Iterator
*/
private function parseHeaderRow(Iterator $iterator)
{
if ($this->csvFormat->hasHeaderRow()) {
$iterator = new CallbackFilterIterator($iterator, [$this, 'handleHeaderRow']);
$iterator = new MapIterator($iterator, [$this, 'mapHeaders']);
}
return $iterator;
}
/**
* Return an initial block if required
*
* @return string
*/
public function getInitialBlock()
{
$linePad = $this->csvFormat->hasHeaderRow() ? $this->csvFormat->getHeaderRow() - 1 : $this->csvFormat->getDataStart() - 1;
return $this->initial . str_repeat($this->getRowSeparator(), $linePad);
}