ProcessWire. Code to hide page tree in the admin

hide-page-tree.php

<?php
/*
CODE COPIED FROM https://processwire.com/talk/topic/6142-hide-page-tree-in-the-admin/

One hook returns false for Page::viewable() for the ProcessPageList page.
Another Hook can be used to redirect users to a custom admin page after login.
*/
// This needs to be an autoload module

public function init() {
  $this->addHookBefore('ProcessHome::execute', $this, 'rootPage');
  $this->addHookAfter('Page::viewable', $this, 'viewable');
}

/**
 * Redirect users with custom-role to another page after login
 */
public function rootPage(HookEvent $event) {
  if ($this->user->hasRole('custom-role')) {
    $this->session->redirect('custom-admin-page/');		
  }
}

/**
 * Don't give users with custom-role access to Pages page
 */
public function viewable(HookEvent $event) {
  $page = $event->object; 
  $user = $this->user;  
  if ($page->id == 3 && $user->hasRole('custom-role') {
    $event->return = false;
  }
}

Thanks for the code. Still coming in handy. Ther's a missing closing parantheses ) for the if statement in line 30.