function delete_site($id, $unregistercourses = false)
{
global $CFG;
require_once $CFG->dirroot . '/local/hub/locallib.php';
$sitetodelete = $this->get_site($id);
//unregister the courses first
if (!empty($unregistercourses)) {
$this->delete_courses($sitetodelete->id);
}
$sitetohubcommunication = $this->get_communication(WSSERVER, REGISTEREDSITE, $sitetodelete->url);
if (!empty($sitetohubcommunication)) {
//delete the token for this site
require_once $CFG->dirroot . '/webservice/lib.php';
$webservice_manager = new webservice();
$tokentodelete = $webservice_manager->get_user_ws_token($sitetohubcommunication->token);
$webservice_manager->delete_user_ws_token($tokentodelete->id);
//delete the communications to this hub
$this->delete_communication($sitetohubcommunication);
}
// Send email to the site administrator.
$contactuser = local_hub_create_contact_user($sitetodelete->contactemail ? $sitetodelete->contactemail : $CFG->noreplyaddress, $sitetodelete->contactname ? $sitetodelete->contactname : get_string('noreplyname'));
$emailinfo = new stdClass();
$hubinfo = $this->get_info();
$emailinfo->hubname = $hubinfo['name'];
$emailinfo->huburl = $hubinfo['url'];
$emailinfo->sitename = $sitetodelete->name;
$emailinfo->siteurl = $sitetodelete->url;
$emailinfo->unregisterpagelink = $sitetodelete->url . '/admin/registration/index.php?huburl=' . $hubinfo['url'] . '&force=1&unregistration=1';
email_to_user($contactuser, get_admin(), get_string('emailtitlesitedeleted', 'local_hub', $emailinfo), get_string('emailmessagesitedeleted', 'local_hub', $emailinfo));
$this->unregister_site($sitetodelete);
}
// Otherwise throw an error (to avoid spam attack).
throw new moodle_exception('freshmoodleregistrationerror2', 'local_hub', new moodle_url($url));
}
} else {
//create a temporary registration token to identify the previously registered site administrator
//The previously registered site admin will receive an email with a link
//when clicking on the link he will be able to update the registration.
$freshmoodletoken = md5(uniqid(rand(), 1));
$sitevalues['secret'] = $sitevalues['token'];
unset($sitevalues['password']);
unset($sitevalues['token']);
set_config($sitewithsameurl->id, serialize(array('newsite' => $sitevalues, 'oldsite' => $sitewithsameurl, 'freshmoodletoken' => $freshmoodletoken, 'time' => time())), 'local_hub_unregistration');
}
//alert existing "secret" site administrator
require_once $CFG->dirroot . '/local/hub/locallib.php';
$contactuser = local_hub_create_contact_user($sitewithsameurl->contactemail, $sitewithsameurl->contactname);
$emailinfo = new stdClass();
$emailinfo->existingsite = $sitewithsameurl->name;
$emailinfo->hubname = get_config('local_hub', 'name');
$freshregistrationurl = new moodle_url('/local/hub/siteregistration.php', array('freshmoodletoken' => $freshmoodletoken, 'id' => $sitewithsameurl->id));
$emailinfo->deletesiteregistration = $freshregistrationurl->out(false);
$emailinfo->url = $sitewithsameurl->url;
email_to_user($contactuser, get_admin(), get_string('emailtitleurlalreadyexists', 'local_hub', $emailinfo), get_string('emailmessageurlalreadyexists', 'local_hub', $emailinfo));
throw new moodle_exception('freshmoodleregistrationerror', 'local_hub', new moodle_url($url), $sitewithsameurl);
}
}
if (get_config('local_hub', 'hubrecaptcha')) {
//fill the "recaptcha" Moodle form with hub values
$siteconfirmationform = new site_registration_confirmation_form('', $sitevalues);
$fromform = $siteconfirmationform->get_data();
if (!empty($fromform)) {
