moodle-mod_sloodle/classroom/httpin_config_linker.php

<?php
/*  Released under the GNU GPL 3.0
*  This script can be used in your scripts, but you must include this copyright header as per the GPL Licence
*  For more information about GPL 3.0 - see: http://www.gnu.org/copyleft/gpl.html
*  This script is part of the SLOODLE Project see http://sloodle.org
*
*  sloodle/classroom/httpin_config_linker.php
*
*  Copyright:
*  @contributers Paul G. Preibisch (Fire Centaur in SL)
*  @contributers Edmund Edgar
*
*  The purpose of this file is to receive a message from a rezzer which is passing an httpinurl for a child object requesting its config.
*  this file will search for the child object in active_object table, save its httpin which was sent, and then pass it its config using curl 
* 
*/ 
/** Lets Sloodle know we are in a linker script. */
define('SLOODLE_LINKER_SCRIPT', true);

/** Grab the Sloodle/Moodle configuration. */
require_once('../init.php');
/** Include the Sloodle PHP API. */
require_once(SLOODLE_LIBROOT.'/sloodle_session.php');
require_once(SLOODLE_LIBROOT.'/general.php');

// Attempt to authenticate the request
// (only require authentication if controller ID and/or password is set)
$authrequired = (isset($_REQUEST['sloodlecontrollerid']) || isset($_REQUEST['sloodlepwd']));
$sloodle = new SloodleSession();
$request_auth = $sloodle->authenticate_request($authrequired);

// Get the extra parameters
$rezzeruuid = $sloodle->request->required_param('sloodleobjuuid');
$httpinurl = $sloodle->request->required_param('httpinurl');    
$childobjectuuid= $sloodle->request->required_param('childobjectuuid');
$controllerid = $sloodle->request->required_param('sloodlecontrollerid');
$objectname = $sloodle->request->optional_param('sloodleobjname');
$extraParams = ($rezzeruuid == $childobjectuuid) ? array() : array( 'sloodlerezzeruuid' => $rezzeruuid );   

// An object authorizing itself.
if ($childobjectuuid == $rezzeruuid) {

    // configs come from a notecard
    $configs = array();
    $configs['sloodlecontrollerid'] = $controllerid;
    foreach($_POST as $n=>$v) {
        if (preg_match('/^set\:(.*)$/', $n, $matches) ) {
            $configs[ $matches[1] ] = $v;
        }
    }
    $objecttype = isset($configs['sloodleobjtype']) ? $configs['sloodleobjtype'] : 'unknown';

    // This is an object trying to register itself with a notecard.
    // Go ahead an do it - it has a legitimate prim password or it would have been stopped already.
    $controller = new SloodleController();
    if (!$controller->load( $controllerid )) {
        $sloodle->response->set_status_code(-217);//Could not save HTTP In URL for rezzed object
        $sloodle->response->set_status_descriptor('OBJECT_AUTH');
        $sloodle->response->add_data_line('Could not save HTTP In URL for rezzed object'); 
    }

    // TODO: Refactor and move this stuff into activeobject

    // first time we way it
    $ao = new SloodleActiveObject();
    if(!$ao->loadByUUID( $childobjectuuid )) {
        $primpassword = sloodle_random_prim_password();
        $httpinpassword = sloodle_random_prim_password();
        if ( !$authid = $controller->register_object($childobjectuuid, $objectname, $sloodle->user, $primpassword, $httpinpassword, $objecttype) ) {
            $sloodle->response->set_status_code(-217);//Could not save HTTP In URL for rezzed object
            $sloodle->response->set_status_descriptor('OBJECT_AUTH');
            $sloodle->response->add_data_line('Could not save HTTP In URL for rezzed object'); 
        }
    } else {
        $authid = $ao->id;
        // already got it - clean out old configs
        sloodle_delete_records('sloodle_object_config', 'object', $authid); 
    }

    if (count($configs) > 0) {
        foreach($configs as $n => $v) {
            $config->id = null;
            $config->object = $authid;
            $config->name = $n;
            $config->value = $v;
            if (!sloodle_insert_record('sloodle_object_config',$config)) {
                $ok = false;
            }
        }
    }

}

//search for active_object table
//create new active object for found record
$active_object= new SloodleActiveObject();
//loadByUUid will search and find the active object
$sloodle->response->add_data_line($childobjectuuid);

if(!$active_object->loadByUUID( $childobjectuuid )){

    // Not a full registration - just the httpinurl and the uuid
    $active_object->httpinurl=$httpinurl;
    $active_object->uuid=$childobjectuuid;
    $active_object->save();

    /*
    $active_object->response = new SloodleResponse();
    $active_object->response->set_status_code(-201);
    $active_object->response->set_status_descriptor('OBJECT_AUTH');
    $active_object->response->add_data_line('Failed to register new active object.');
    */
    $renderStr="";
    //create message
    //send message to httpin
    $sloodle->response->set_status_code(1);
    $sloodle->response->set_status_descriptor('OBJECT_AUTH');
    $sloodle->response->render_to_output();

} else{

     // If an object we've never seen before wants to tell us its http-in url
     // ...we'll record it for now, but not do the rest of the registration.
     // This means the object will get configured even if the request from the object gets to the server
     // ...before the object that rezzed it has told us about it.
     $active_object->httpinurl=$httpinurl;
     if (!$active_object->save()) {                
        $sloodle->response->set_status_code(-217);//Could not save HTTP In URL for rezzed object
        $sloodle->response->set_status_descriptor('OBJECT_AUTH');
        $sloodle->response->add_data_line('Could not save HTTP In URL for rezzed object'); 
     }

    $async_config = ( defined('SLOODLE_ASYNC_SEND_CONFIG') && SLOODLE_ASYNC_SEND_CONFIG);

    //active object is loaded, send config to the object, and also send the rezzeruuid to the object so 
    //our object also knows its rezzer uuid 
    $result = $active_object->sendConfig($extraParams, $async_config, $async_config);
    //result is an array(curlinfo,curlresult)
    //lsl script returns an OK or FAIL
    if ( in_array( $result["result"], array('OK','QUEUED') ) ) { 
        $sloodle->response->set_status_code(1);
        $sloodle->response->set_status_descriptor('OK');//httpin config sent properly
    }else{
        $sloodle->response->set_status_code(-219);//Sending configuration to object via HTTP-in URL failed
        $sloodle->response->set_status_descriptor('OBJECT_AUTH');
        $sloodle->response->add_data_line('Sending configuration to object via HTTP-in URL failed'); 
    }

    $sloodle->response->render_to_output();

}//end else
?>