Processwire Append Other Page Body

gistfile1.php

<?php
class AppendBoilerplates extends WireData implements Module {

    /**
    * Basic information about module
    */
    public static function getModuleInfo() {
	    return array(
		   'title' => 'Append Boilerplates',
		   'summary' => 'Append selected boilerplate texts to a text body',
		   'href' => '',
		   'version' => 001,
		   'permanent' => false,
		   'autoload' => true,
		   'singular' => true,
	    );
    }


    /**
    * Populate the default config data
    *
    */
    public function __construct() {

    }

    /**
    * Initialize the module and setup hooks
    */
    public function init() {
	   $this->pages->addHookAfter('saveReady', $this, 'AppendBoilerplates');
    }

    /**
    *
    * @param HookEvent $event
    */
    public function AppendBoilerplates(HookEvent $event) {
	   // Accesses the $page object

	   $page = $event->arguments[0];
	   //if(!$page) return;
	   
	   if($page->template != 'email') return;
	   
	   $body = $page->body;	
	   	if($page->boilerplate_select->count()) {
		   	foreach($page->boilerplate_select as $bp) {
			   	$body .= '<hr>' . $bp->body;	
			   	$page->boilerplate_select->remove($bp);
			   	$page->save();
			   	$this->message("{$bp->title} inserted and removed from selected boilerplates");
		   	}	
	   	}	    
	  $page->body = $body;		
    }
}