ProcessWire: Hide non-editable pages in the page tree

ready.php

<?php namespace ProcessWire;

// Taken from https://processwire.com/talk/topic/22369-hide-uneditable-pages-in-admin-treeprocesspagelist/?tab=comments#comment-191963

$this->addHookAfter('ProcessPageList::find', function(HookEvent $event) {
  $pages = $event->return;
  $excludePagesByTemplate = array('admin', 'basic-page');
  
  $pages->each(function($p) use($pages, $excludePagesByTemplate) {
    if(!in_array($p->template, $excludePagesByTemplate)) return;
    if(!$p->editable() && !$p->addable()) $pages->remove($p);
  });
  
  $event->return = $pages;
});