/**
* Return all sibling pages before this one until matching the one specified
*
* @param Page $page
* @param string|Page $selector May either be a selector string or Page to stop at. Results will not include this.
* @param string $filter Optional selector string to filter matched pages by
* @param PageArray|null $siblings Optional PageArray of siblings to use instead of all from the page.
* @return PageArray
*
*/
public function prevUntil(Page $page, $selector = '', $filter = '', PageArray $siblings = null)
{
if (is_null($siblings)) {
$siblings = $page->parent()->children();
} else {
if (!$siblings->has($page)) {
$siblings->add($page);
}
}
$siblings = $this->prevAll($page, '', $siblings);
$all = new PageArray();
$stop = false;
foreach ($siblings->reverse() as $sibling) {
if (is_string($selector) && strlen($selector)) {
if (ctype_digit("{$selector}") && $sibling->id == $selector) {
$stop = true;
} else {
if ($sibling->matches($selector)) {
$stop = true;
}
}
} else {
if (is_int($selector)) {
if ($sibling->id == $selector) {
$stop = true;
}
} else {
if ($selector instanceof Page && $sibling->id == $selector->id) {
$stop = true;
}
}
}
if ($stop) {
break;
}
$all->prepend($sibling);
}
if (strlen($filter)) {
$all->filter($filter);
}
return $all;
}
/**
* Return this page's parent pages.
*
*/
public function parents()
{
$parents = new PageArray();
$parent = $this->parent();
while ($parent && $parent->id) {
$parents->prepend($parent);
$parent = $parent->parent();
}
return $parents;
}
