`$page->topmostParent()` method

[lukasbestle]

I often have the need to get the "topmost parent" of the current page like this:

home                -> home
photography         -> photography
photography/animals -> photography

Current implementation in a page method:

Kirby::plugin('my/plugin', [
    'pageMethods' => [
        'topmostParent' => function(): ?Page {
            if (isset($this->topmostParent)) {
                return $this->topmostParent;
            }

            // get the topmost parent
            $topmostParent = $this->parents()->last();

            // if there is no parent, the current page is already it
            if ($topmostParent === null) {
                $topmostParent = $this;
            }

            return $this->topmostParent = $topmostParent;
        }
    ]
]);

I think this could be a good fit for a core page method.

[distantnative]

return $this->topmostParent = $this->topmostParent ?? $this->parents()->last() ?? $this;

We could make it a one-liner 😄

[lukasbestle]

That‘s right, but is that desirable? I think it‘s a lot harder to read.