Add callback before View renders

[aerni]

Is it possible to add something like abeforeRender callback to Statamic\View\View? Similar to the Cascade::hydrated() callback added here: statamic/cms#4359

I use the Cascade::hydrated() callback to add additional data to the context. This does mostly what I need it to do. But there are cases where a View adds additional data to the cascade in the gatherData() method, e.g. in the NotFoundHttpException.

So the final context data can be different to what's available in the Cascade::hydrated() callback. I need a way to have the last say before the context gets added to the page.

[aerni]

I found that Laravel already provides a way to do so:

\Illuminate\Support\Facades\View::composer('*', function ($view) {
  $view->with('foo', 'bar');
});

The view in this callback has all the data from the context and additional data from Statamic's views available.

[jackmcdade]

Bingo! 🙌