index.php

<?php
namespace ExternalModules;

$noAuth = isset($_GET['NOAUTH']);
if($noAuth){
	// This must be defined at the top before redcap_connect.php is required.
	define('NOAUTH', true);
}

require_once dirname(__FILE__) . '/classes/ExternalModules.php';

use Exception;

$id = $_GET['id'];
$page = $_GET['page'];
$pid = @$_GET['pid'];

$prefix = ExternalModules::getPrefixForID($id);
if(empty($prefix)){
	throw new Exception("A module with id $id could not be found!");
}

$version = ExternalModules::getSystemSetting($prefix, ExternalModules::KEY_VERSION);
if(empty($version)){
	throw new Exception("The requested module is currently disabled systemwide.");
}

$config = ExternalModules::getConfig($prefix, $version);
if($noAuth && !in_array($page, $config['no-auth-pages'])){
	throw new Exception("The NOAUTH parameter is not allowed on this page.");
}

if($pid != null){
	$enabledGlobal = ExternalModules::getSystemSetting($prefix,ExternalModules::KEY_ENABLED);
	$enabled = ExternalModules::getProjectSetting($prefix, $pid, ExternalModules::KEY_ENABLED);
	if(!$enabled && !$enabledGlobal){
		throw new Exception("The requested module is currently disabled on this project.");
	}
}

if (preg_match("/^https:\/\//", $page) || preg_match("/^http:\/\//", $page)) {
	header( 'Location: '.$page ) ;
}

$pagePath = ExternalModules::getModuleDirectoryPath($prefix, $version) . "/$page.php";
if(!file_exists($pagePath)){
	throw new Exception("The specified page does not exist for this module. $pagePath");
}

// This variable is not used here, but is intended for use inside the file required below.
$module = ExternalModules::getModuleInstance($prefix, $version);

require_once $pagePath;