<?php
/*
Extension Name: Check Names
Extension Url: http://lussumo.com/addons/index.php?PostBackAction=AddOn&AddOnID=401
Description: If a user wants to register it checks the username if it contains not allowed characters.
Version: 0.2
Author: elm
Author Url: www.lussumo.com
*/

if ($Context->SelfUrl == "people.php"
	&& in_array(ForceIncomingString('PostBackAction', ''),
				array('ApplyForm', 'Apply'))) {

	$Context->SetDefinition('ErrNotAllowedCharsFound', 'There are characters in 
	the username that are not allowed. Only Letters, Numbers and _ are allowed in the username.');
	
   function ApplyForm_AddCheckNamesRequirements(&$ApplyForm) {
   	/* 
   	/W stands for all characters expect "A-Z", "a-z", "0-9" and "_".
   	When it finds one it returns 1 and if not 0. So 1 means theres an illegal
   	character in the name.
   	*/
   	$pattern = '/\W/';
		if (preg_match($pattern, $ApplyForm->Applicant->Name) == 1) {
			$ApplyForm->Context->WarningCollector->Add($ApplyForm->Context->GetDefinition('ErrNotAllowedCharsFound'));
		}
   }

   $Context->AddToDelegate("ApplyForm",
      "PreCreateUser",
      "ApplyForm_AddCheckNamesRequirements");
}
?>