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bltilaunch.php
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<?php
//IMathAS: BasicLTI Producer Code
//(c) David Lippman 2009
//
//
//launches with 5 types of key/secrets
// username : of a user with rights 11 or 76 (has to manually entered into database, along with a plaintext password as the secret)
// aid_### : launches assessment with given id. secret is course's ltisecret
// cid_### : launches course with given id. secret is course's ltisecret
// placein_### : launches a content linkage selector. In Canvas, uses resource selection return.
// in others, links to resource id (which is lost on LMS course copy)
// sso_username : launches single signon to home page using given userid w/ rights 11 or 76.
// secret value stored in DB password field. Currently must be manually editted in DB
// username : like sso_username, but triggers course/item connection
// aid_, cid_, and sso_ types accept additional _0 or _1 : 0 is default, and links LMS account with a local account
// 1 using LMS for validation, does not ask for local account info
//
// for sso_ and username types, if associated user has rights 11, instructors must link accounts;
// rights 76 allows TC to create instructor accounts
//
// LMS MUST provide, in addition to key and secret:
// user_id
//
// LMS MAY provide:
// lis_person_name_given
// lis_person_name_family
// lis_person_contact_email_primary
header('P3P: CP="ALL CUR ADM OUR"');
$init_skip_csrfp = true;
include("init_without_validate.php");
unset($init_skip_csrfp);
//Look to see if a hook file is defined, and include if it is
if (isset($CFG['hooks']['bltilaunch'])) {
require($CFG['hooks']['bltilaunch']);
}
$curdir = rtrim(dirname(__FILE__), '/\\');
if((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS']=='on') || (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO']=='https')) {
$urlmode = 'https://';
} else {
$urlmode = 'http://';
$errormsg = 'This launch was made insecurely (using http instead of https). ';
$errormsg .= $installname.' requires secure launches to protect student data. ';
$ltirole = strtolower($_REQUEST['roles']);
if (strpos($ltirole,'instructor')!== false || strpos($ltirole,'administrator')!== false || strpos($ltirole,'contentdeveloper')!== false) {
$errormsg .= 'Please update the links or tool in the LMS to use https (aka SSL). ';
if ($_REQUEST['tool_consumer_info_product_family_code'] == 'moodle') {
$errormsg .= 'In Moodle, you can do this by clicking the "Edit preconfigured tool" icon, scrolling down to Privacy, and clicking the Force SSL checkbox. ';
$errormsg .= 'If you do not have access to do this, you might need to ask your LMS administrator to enable the Force SSL option. ';
}
}
reporterror($errormsg);
}
if ($enablebasiclti!=true) {
echo "BasicLTI not enabled";
exit;
}
function reporterror($err) {
global $imasroot;
require("header.php");
printf('<p>%s</p>', Sanitize::encodeStringForDisplay($err));
require("footer.php");
exit;
}
function generateToolState() {
if (function_exists("random_bytes")) {
$token = bin2hex(random_bytes(64));
} elseif (function_exists("openssl_random_pseudo_bytes")) {
$token = bin2hex(openssl_random_pseudo_bytes(64));
} else {
$token = '';
for ($i = 0; $i < 64; ++$i) {
$r = mt_rand (0, 35);
if ($r < 26) {
$c = chr(ord('a') + $r);
} else {
$c = chr(ord('0') + $r - 26);
}
$token .= $c;
}
}
return substr($token, 0, 64);
}
function do112relaunch() {
if (!isset($_REQUEST['platform_state'])) {
reporterror("Missing platform_state");
}
$_SESSION['lti_tool_state'] = generateToolState();
echo '<html><body><form id="theform" method="POST" action="'.Sanitize::encodeStringForDisplay($_REQUEST['relaunch_url']).'">
<input type=hidden name="tool_state" value="'.Sanitize::encodeUrlParam($_SESSION['lti_tool_state']).'">
<input type=hidden name="platform_state" value="'.Sanitize::encodeUrlParam($_REQUEST['platform_state']).'">
</form><script>document.getElementById("theform").submit();</script></body></html>';
exit;
}
function verify112relaunch() {
if ($_REQUEST['tool_state'] != $_SESSION['lti_tool_state']) {
reporterror("Invalid tool_state");
exit;
}
}
//start session - session_start already called in init
$sessionid = session_id();
$atstarthasltiuserid = isset($_SESSION['ltiuserid']);
$askforuserinfo = false;
$now = time();
//use new behavior for place_aid requests that don't come from a placein_###_# key
if (
(isset($_SESSION['place_aid']) && isset($_SESSION['lti_keytype']) && $_SESSION['lti_keytype']=='cc-a' && !isset($_REQUEST['oauth_consumer_key']))
||
(isset($_REQUEST['custom_place_aid']) && isset($_REQUEST['oauth_consumer_key']) && substr($_REQUEST['oauth_consumer_key'],0,7)!='placein')
) {
//if (isset($_SESSION['place_aid']) || isset($_REQUEST['custom_place_aid'])) {
/*use new behavior for place_aid requests */
//check to see if accessiblity page is posting back
if (isset($_GET['launch'])) {
$stm = $DBH->prepare('SELECT sessiondata,userid FROM imas_sessions WHERE sessionid=:sessionid');
$stm->execute(array(':sessionid'=>$sessionid));
if ($stm->rowCount()==0) {
reporterror("No authorized session exists. This is most likely caused by your browser blocking third-party cookies. Please adjust your browser settings and try again.");
}
list($enc,$userid) = $stm->fetch(PDO::FETCH_NUM);
$sessiondata = unserialize(base64_decode($enc));
if (isset($_POST['tzname'])) {
$sessiondata['logintzname'] = $_POST['tzname'];
}
require_once("$curdir/includes/userprefs.php");
generateuserprefs();
$enc = base64_encode(serialize($sessiondata));
$stm = $DBH->prepare('UPDATE imas_users SET lastaccess=:lastaccess WHERE id=:id');
$stm->execute(array(':lastaccess'=>$now, ':id'=>$userid));
if (isset($_POST['tzname'])) {
$tzname = $_POST['tzname'];
} else {
$tzname = '';
}
$stm = $DBH->prepare('UPDATE imas_sessions SET sessiondata=:sessiondata,tzoffset=:tzoffset,tzname=:tzname WHERE sessionid=:sessionid');
$stm->execute(array(':sessiondata'=>$enc, ':tzoffset'=>$_POST['tzoffset'], ':tzname'=>$tzname, ':sessionid'=>$sessionid));
$keyparts = explode('_',$_SESSION['ltikey']);
if ($sessiondata['ltiitemtype']==0) { //is aid
$aid = $sessiondata['ltiitemid'];
$stm = $DBH->prepare('SELECT courseid,ver FROM imas_assessments WHERE id=:aid');
$stm->execute(array(':aid'=>$aid));
list($cid,$aver) = $stm->fetch(PDO::FETCH_NUM);
if ($cid===false) {
$diaginfo = "(Debug info: 1-$aid)";
reporterror("This assignment does not appear to exist anymore. $diaginfo");
}
if ($sessiondata['ltirole'] == 'learner') {
$stm = $DBH->prepare('INSERT INTO imas_content_track (userid,courseid,type,typeid,viewtime,info) VALUES (:userid,:courseid,\'assesslti\',:typeid,:viewtime,\'\')');
$stm->execute(array(':userid'=>$userid,':courseid'=>$cid,':typeid'=>$aid,':viewtime'=>$now));
}
if ($aver > 1) {
header('Location: ' . $GLOBALS['basesiteurl'] . "/assess2/?cid=$cid&aid=$aid");
} else {
header('Location: ' . $GLOBALS['basesiteurl'] . "/assessment/showtest.php?cid=$cid&id=$aid");
}
} else if ($sessiondata['ltiitemtype']==1) { //is cid
$cid = $sessiondata['ltiitemid'];
header('Location: ' . $GLOBALS['basesiteurl'] . "/course/course.php?cid=$cid");
} else if ($sessiondata['ltiitemtype']==2) {
header('Location: ' . $GLOBALS['basesiteurl'] . "/index.php");
} else if ($sessiondata['ltiitemtype']==3) {
$cid = $sessiondata['ltiitemid'][2];
$folder = $sessiondata['ltiitemid'][1];
header('Location: ' . $GLOBALS['basesiteurl'] . "/course/course.php?cid=$cid&folder=".$folder);
} else { //will only be instructors hitting this option
header('Location: ' . $GLOBALS['basesiteurl'] . "/ltihome.php");
}
exit;
} else if (isset($_GET['accessibility'])) {
$stm = $DBH->prepare('SELECT sessiondata,userid FROM imas_sessions WHERE sessionid=:sessionid');
$stm->execute(array(':sessionid'=>$sessionid));
if ($stm->rowCount()==0) {
reporterror("No authorized session exists. This is most likely caused by your browser blocking third-party cookies. Please adjust your browser settings and try again.");
}
list($enc,$userid) = $stm->fetch(PDO::FETCH_NUM);
$sessiondata = unserialize(base64_decode($enc));
//time to output a postback to capture tzname
$pref = 0;
$flexwidth = true;
$nologo = true;
$placeinhead = "<script type=\"text/javascript\" src=\"$imasroot/javascript/jstz_min.js\" ></script>";
require("header.php");
echo "<h3>Connecting to $installname</h3>";
echo "<form id=\"postbackform\" method=\"post\" action=\"" . $imasroot . "/bltilaunch.php?launch=true\" ";
if ($sessiondata['ltiitemtype']==0 && $sessiondata['ltitlwrds'] != '') {
echo "onsubmit='return confirm(\"This assessment has a time limit of "
.Sanitize::encodeStringForJavascript($sessiondata['ltitlwrds'])
.". Click OK to start or continue working on the assessment.\")' >";
echo "<p class=noticetext>This assessment has a time limit of ".Sanitize::encodeStringForDisplay($sessiondata['ltitlwrds']).".</p>";
echo '<div class="textright"><input type="submit" value="Continue" /></div>';
if ($sessiondata['lticanuselatepass']) {
echo "<p><a href=\"$imasroot/course/redeemlatepass.php?from=ltitimelimit&cid=".Sanitize::encodeUrlParam($sessiondata['ltiitemcid'])."&aid=".Sanitize::encodeUrlParam($sessiondata['ltiitemid'])."\">", _('Use LatePass'), "</a></p>";
}
} else {
echo ">";
}
?>
<div id="settings"><noscript>JavaScript is not enabled. JavaScript is required for <?php echo $installname; ?>.
Please enable JavaScript and reload this page</noscript></div>
<input type="hidden" id="tzoffset" name="tzoffset" value="" />
<input type="hidden" id="tzname" name="tzname" value="">
<script type="text/javascript">
$(function() {
var thedate = new Date();
document.getElementById("tzoffset").value = thedate.getTimezoneOffset();
var tz = jstz.determine();
document.getElementById("tzname").value = tz.name();
<?php
if ($sessiondata['ltiitemtype']!=0 || $sessiondata['ltitlwrds'] == '') {
//auto submit the form
echo 'document.getElementById("postbackform").submit();';
}
?>
});
</script>
</form>
<?php
require("footer.php");
exit;
} else if (isset($_GET['userinfo']) && isset($_SESSION['ltiuserid'])) {
//check to see if new LTI user is posting back user info
$ltiuserid = $_SESSION['ltiuserid'];
$ltiorg = $_SESSION['ltiorg'];
$ltirole = $_SESSION['ltirole'];
$keyparts = explode('_',$_SESSION['ltikey']);
$name_only = false;
if (count($keyparts)==1 && $ltirole=='learner') {
$name_only = true;
} else if (count($keyparts)>2 && $keyparts[2]==1 && $ltirole=='learner') {
$name_only = true;
}
if ($ltirole=='learner' || $_SESSION['lti_keyrights']==76 || $_SESSION['lti_keyrights']==77) {
$allow_acctcreation = true;
} else {
$allow_acctcreation = false;
}
if ($_GET['userinfo']=='set') {
if (isset($CFG['GEN']['newpasswords'])) {
require_once("includes/password.php");
}
//check input
$infoerr = '';
unset($userid);
if ($name_only) {
if (empty($_POST['firstname']) || empty($_POST['lastname'])) {
$infoerr = 'Please provide your name';
}
$_POST['email'] = 'none@none.com';
$msgnot = 0;
} else {
if (!empty($_POST['curSID']) && !empty($_POST['curPW'])) {
//provided current SID/PW pair
$stm = $DBH->prepare('SELECT password,id FROM imas_users WHERE SID=:sid');
$stm->execute(array(':sid'=>$_POST['curSID']));
//if (mysql_num_rows($result)==0) {
if ($stm->rowCount()==0) {
$infoerr = 'Username (key) is not valid';
} else {
list($realpw,$tmpuserid) = $stm->fetch(PDO::FETCH_NUM); //DB mysql_result($result,0,0);
if (((!isset($CFG['GEN']['newpasswords']) || $CFG['GEN']['newpasswords']!='only') && ($realpw == md5($_POST['curPW'])))
|| (isset($CFG['GEN']['newpasswords']) && password_verify($_POST['curPW'],$realpw)) ) {
$userid= $tmpuserid; //DB mysql_result($result,0,1);
} else {
$infoerr = 'Existing username/password provided are not valid.';
unset($tmpuserid);
}
}
} else {
if (!$allow_acctcreation) {
$infoerr = 'Must link to an existing account';
} else {
require_once(__DIR__.'/includes/newusercommon.php');
$infoerr = checkNewUserValidation();
//new info
if (isset($_POST['msgnot'])) {
$msgnot = 1;
} else {
$msgnot = 0;
}
if (isset($CFG['GEN']['newpasswords'])) {
$md5pw = password_hash($_POST['pw1'], PASSWORD_DEFAULT);
} else {
$md5pw = md5($_POST['pw1']);
}
}
}
}
if ($infoerr=='') { // no error, so create!
$stm = $DBH->prepare('INSERT INTO imas_ltiusers (org,ltiuserid) VALUES (:org,:ltiuserid)');
$stm->execute(array(':org'=>$ltiorg,':ltiuserid'=>$ltiuserid));
$localltiuser = $DBH->lastInsertId();
if (!isset($userid) && $allow_acctcreation) {
if ($name_only) {
//make up a username/password for them
$_POST['SID'] = 'lti-'.$localltiuser;
$md5pw = 'pass'; //totally unusable since not md5'ed
}
if ($ltirole=='instructor') {
if (isset($CFG['LTI']['instrrights'])) {
$rights = $CFG['LTI']['instrrights'];
} else {
$rights = 40;
}
$newgroupid = intval($_SESSION['lti_keygroupid']);
$query = "INSERT INTO imas_users (SID,password,rights,FirstName,LastName,email,msgnotify,groupid) VALUES ";
$query .= '(:SID,:password,:rights,:FirstName,:LastName,:email,:msgnotify,:groupid)';
$stm = $DBH->prepare($query);
$stm->execute(array(':SID'=>$_POST['SID'], ':password'=>$md5pw,':rights'=>$rights,
':FirstName'=>$_POST['firstname'],':LastName'=>$_POST['lastname'],':email'=>$_POST['email'],
':msgnotify'=>$msgnot,':groupid'=>$newgroupid));
} else {
$rights = 10;
$query = "INSERT INTO imas_users (SID,password,rights,FirstName,LastName,email,msgnotify) VALUES ";
$query .= '(:SID,:password,:rights,:FirstName,:LastName,:email,:msgnotify)';
$stm = $DBH->prepare($query);
$stm->execute(array(':SID'=>$_POST['SID'], ':password'=>$md5pw,':rights'=>$rights,
':FirstName'=>$_POST['firstname'],':LastName'=>$_POST['lastname'],':email'=>$_POST['email'],
':msgnotify'=>$msgnot));
}
$userid = $DBH->lastInsertId(); //DB mysql_insert_id();
if ($rights>=20) {
//log new account
$stm = $DBH->prepare("INSERT INTO imas_log (time, log) VALUES (:now, :log)");
$stm->execute(array(':now'=>$now, ':log'=>"New Instructor Request: $userid:: Group: $newgroupid, added via LTI"));
$reqdata = array('added'=>$now, 'actions'=>array(array('on'=>$now, 'status'=>11, 'via'=>'LTI')));
$stm = $DBH->prepare("INSERT INTO imas_instr_acct_reqs (userid,status,reqdate,reqdata) VALUES (?,11,?,?)");
$stm->execute(array($newuserid, $now, json_encode($reqdata)));
}
}
$stm = $DBH->prepare('UPDATE imas_ltiusers SET userid=:userid WHERE id=:localltiuser');
$stm->execute(array(':userid'=>$userid, ':localltiuser'=>$localltiuser));
} else {
//uh-oh, had an error. Better ask for user info again
$askforuserinfo = true;
}
} else {
//ask for student info
$flexwidth = true;
$nologo = true;
$placeinhead .= '<script type="text/javascript" src="'.$imasroot.'/javascript/jquery.validate.min.js?v=122917"></script>';
require("header.php");
if (isset($infoerr)) {
echo '<p class=noticetext>'.Sanitize::encodeStringForDisplay($infoerr).'</p>';
}
echo "<form method=\"post\" id=\"pageform\" class=\"limitaftervalidate\" action=\"".$imasroot."/bltilaunch.php?userinfo=set\" ";
if ($name_only) {
//using LTI for authentication; don't need username/password
//only request name
echo "<p>Please provide a little information about yourself:</p>";
echo "<span class=form><label for=\"firstname\">Enter First Name (given name):</label></span> <input class=form type=text size=20 id=firstname name=firstname><BR class=form>\n";
echo "<span class=form><label for=\"lastname\">Enter Last Name (surname):</label></span> <input class=form type=text size=20 id=lastname name=lastname><BR class=form>\n";
echo "<div class=submit><input type=submit value='Submit'></div>\n";
echo '<script type="text/javascript"> $(function() {
$("#pageform").validate({
rules: {
firstname: {required: true},
lastname: {required: true}
},
submitHandler: function(el,evt) {return submitlimiter(evt);}
});
});</script>';
} else {
$deffirst = '';
$deflast = '';
$defemail = '';
if (isset($_SESSION['LMSfirstname'])) {
$deffirst = $_SESSION['LMSfirstname'];
}
if (isset($_SESSION['LMSlastname'])) {
$deflast = $_SESSION['LMSlastname'];
}
if (isset($_SESSION['LMSemail'])) {
$defemail = $_SESSION['LMSemail'];
}
if (isset($_SESSION['ltiorgname'])) {
$ltiorgname = $_SESSION['ltiorgname'];
} else {
$ltiorgname = $ltiorg;
}
//strip off prepended org info before display
$ltiorgparts = explode(':',$ltiorgname);
if (count($ltiorgparts)>2) {
array_shift($ltiorgparts);
$ltiorgname = implode(':',$ltiorgparts);
} else {
$ltiorgname = $ltiorgparts[1];
}
//tying LTI to IMAthAS account
//give option to provide existing account info, or provide full new student info
if ($allow_acctcreation) {
echo "<p>If you already have an account on $installname, enter your username and ";
echo "password below to enable automated signon from ".Sanitize::encodeStringForDisplay($ltiorgname)."</p>";
} else {
echo "<p>Enter your username and ";
echo "password for $installname below to enable automated signon from ".Sanitize::encodeStringForDisplay($ltiorgname)."</p>";
}
echo "<span class=form><label for=\"curSID\">".Sanitize::encodeStringForDisplay($loginprompt).":</label></span> <input class=form type=text size=12 id=\"curSID\" name=\"curSID\"><BR class=form>\n";
echo "<span class=form><label for=\"curPW\">Password:</label></span><input class=form type=password size=20 id=\"curPW\" name=\"curPW\"><BR class=form>\n";
echo "<div class=submit><input type=submit value='Sign In'></div>\n";
if ($allow_acctcreation) {
echo "<p>If you do not already have an account on $installname, provide the information below to create an account ";
echo "and enable automated signon from ".Sanitize::encodeStringForDisplay($ltiorgname)."</p>";
echo "<span class=form><label for=\"SID\">".Sanitize::encodeStringForDisplay($longloginprompt).":</label></span> <input class=form type=text size=12 id=SID name=SID><BR class=form>\n";
echo "<span class=form><label for=\"pw1\">Choose a password:</label></span><input class=form type=password size=20 id=pw1 name=pw1><BR class=form>\n";
echo "<span class=form><label for=\"pw2\">Confirm password:</label></span> <input class=form type=password size=20 id=pw2 name=pw2><BR class=form>\n";
echo "<span class=form><label for=\"firstname\">Enter First Name:</label></span> <input class=form type=text value=\"".Sanitize::encodeStringForDisplay($deffirst)."\" size=20 id=firstnam name=firstname><BR class=form>\n";
echo "<span class=form><label for=\"lastname\">Enter Last Name:</label></span> <input class=form type=text value=\"".Sanitize::encodeStringForDisplay($deflast)."\" size=20 id=lastname name=lastname><BR class=form>\n";
echo "<span class=form><label for=\"email\">Enter E-mail address:</label></span> <input class=form type=text value=\"".Sanitize::encodeStringForDisplay($defemail)."\" size=60 id=email name=email><BR class=form>\n";
echo "<span class=form><label for=\"msgnot\">Notify me by email when I receive a new message:</label></span><input class=floatleft type=checkbox id=msgnot name=msgnot /><BR class=form>\n";
echo "<div class=submit><input type=submit value='Create Account'></div>\n";
require_once(__DIR__.'/includes/newusercommon.php');
$requiredrules = array(
'curSID'=>'{depends: function(element) {return $("#SID").val()==""}}',
'curPW'=>'{depends: function(element) {return $("#SID").val()==""}}',
'SID'=>'{depends: function(element) {return $("#SID").val()!=""}}',
'pw1'=>'{depends: function(element) {return $("#SID").val()!=""}}',
'pw2'=>'{depends: function(element) {return $("#SID").val()!=""}}',
'firstname'=>'{depends: function(element) {return $("#SID").val()!=""}}',
'lastname'=>'{depends: function(element) {return $("#SID").val()!=""}}',
'email'=>'{depends: function(element) {return $("#SID").val()!=""}}',
);
showNewUserValidation('pageform',array('curSID','curPW'), $requiredrules);
} else {
echo "<p>If you do not already have an account on $installname, please visit the site to request an account.</p>";
echo '<script type="text/javascript"> $(function() {
$("#pageform").validate({
rules: {
curSID: {required: true},
curPW: {required: true}
},
submitHandler: function(el,evt) {return submitlimiter(evt);}
});
});</script>';
}
}
echo "</form>\n";
require("footer.php");
exit;
}
} else if (isset($_SESSION['ltiuserid']) && !isset($_REQUEST['oauth_consumer_key'])) {
//refreshed this page from accessibility options page so session already exists
// (if user_id is set, then is new LTI request, so want to pass down to OAuth)
//pull necessary info and continue
if (isset($_SESSION['userid'])) {
$userid = $_SESSION['userid'];
} else {
$stm = $DBH->prepare('SELECT userid FROM imas_sessions WHERE sessionid=:sessionid');
$stm->execute(array(':sessionid'=>$sessionid));
if ($stm->rowCount()==0) {
reporterror("No session recorded");
} else {
$userid = $stm->fetchColumn(0); //DB mysql_result($result,0,0);
}
}
$keyparts = explode('_',$_SESSION['ltikey']);
} else if(isset($_REQUEST['custom_view_folder'])) {
//temporary branch for handling this deprecated feature, until it can be removed.
$linkparts = explode("-",$_REQUEST['custom_view_folder']);
$stm = $DBH->prepare('SELECT itemorder FROM imas_courses WHERE id=:cid');
$stm->execute(array(':cid'=>$linkparts[0]));
if ($stm->rowCount()==0) {
reporterror("invalid course identifier in folder view launch");
} else {
$cid = intval($linkparts[0]);
$row = $stm->fetch(PDO::FETCH_ASSOC); //DB mysql_fetch_row($result2);
$items = unserialize($row['itemorder']);
function findfolder($items,$n,$loc) {
foreach ($items as $k=>$b) {
if (is_array($b)) {
if ($b['id']==$n) {
return $loc.'-'.($k+1);
} else {
$out = findfolder($b['items'],$n,$loc.'-'.($k+1));
if ($out != '') {
return $out;
}
}
}
}
return '';
}
$loc = findfolder($items, $linkparts[1], '0');
if ($loc=='') {
reporterror("invalid folder identifier in folder view launch");
}
header('Location: ' . $GLOBALS['basesiteurl'] . "/course/public.php?cid=".$linkparts[0]."&folder=".$loc);
}
exit;
} else {
//not postback of new LTI user info, so must be fresh request
//verify necessary POST values for LTI. OAuth specific will be checked later
if (empty($_REQUEST['lti_version'])) {
reporterror("Insufficient launch information. This might indicate your browser is set to restrict third-party cookies. Check your browser settings and try again");
}
if (empty($_REQUEST['user_id'])) {
if (isset($_REQUEST['relaunch_url'])) {
do112relaunch();
}
reporterror("Unable to launch - User information not provided (user_id is required)");
} else {
$ltiuserid = $_REQUEST['user_id'];
}
if (!empty($_REQUEST['tool_state'])) {
verify112relaunch();
}
if (empty($_REQUEST['context_id'])) {
reporterror("Unable to launch - Course information not provided (context_id is required)");
}
if (isset($_SESSION['ltiuserid']) && $_SESSION['ltiuserid']!=$ltiuserid) {
//new user - need to clear out session
session_destroy();
session_start();
session_regenerate_id();
$sessionid = session_id();
$_SESSION = array();
//setcookie(session_name(),session_id(),0,'','',false,true );
}
/*if (empty($_REQUEST['roles'])) {
reporterror("roles is required");
} else {
$ltirole = $_REQUEST['roles'];
}*/
if (empty($_REQUEST['tool_consumer_instance_guid'])) {
$ltiorg = 'Unknown';
} else {
$ltiorg = $_REQUEST['tool_consumer_instance_guid'];
}
if (empty($_REQUEST['oauth_consumer_key'])) {
reporterror("Unable to launch - oauth_consumer_key (resource key) is required");
} else {
$ltikey = $_REQUEST['oauth_consumer_key'];
}
//check OAuth Signature!
require_once 'includes/OAuth.php';
require_once 'includes/ltioauthstore.php';
//set up OAuth
$store = new IMathASLTIOAuthDataStore();
$server = new OAuthServer($store);
$method = new OAuthSignatureMethod_HMAC_SHA1();
$server->add_signature_method($method);
$method2 = new OAuthSignatureMethod_HMAC_SHA256();
$server->add_signature_method($method2);
$request = OAuthRequest::from_request();
$base = $request->get_signature_base_string();
try {
$requestinfo = $server->verify_request($request);
} catch (Exception $e) {
reporterror($e->getMessage());
}
$store->mark_nonce_used($request);
$keyparts = explode('_',$ltikey);
$_SESSION['ltiorigkey'] = $ltikey;
// prepend ltiorg with courseid or sso+userid to prevent cross-instructor hacking
if ($keyparts[0]=='LTIkey') { //cid:org
$_SESSION['ltilookup'] = 'c';
$ltiorg = $keyparts[1].':'.$ltiorg;
$keytype = 'gc';
} else {
$_SESSION['ltilookup'] = 'u';
$ltiorg = $ltikey.':'.$ltiorg;
$keytype = 'g';
}
if (isset($_REQUEST['custom_place_aid'])) { //common catridge lti placement, or Canvas LTI selection
$placeaid = intval($_REQUEST['custom_place_aid']);
$keytype = 'cc-a';
$_SESSION['place_aid'] = $_REQUEST['custom_place_aid'];
} else if (isset($_REQUEST['custom_open_folder'])) {
$keytype = 'cc-of';
$parts = explode('-',$_REQUEST['custom_open_folder']);
$sourcecid = $parts[0];
$_SESSION['open_folder'] = array($sourcecid,$parts[1]);
}
//Store all LTI request data in session variable for reuse on submit
//if we got this far, secret has already been verified
$_SESSION['ltiuserid'] = $ltiuserid;
$_SESSION['ltiorg'] = $ltiorg;
$ltirole = strtolower($_REQUEST['roles']);
if (strpos($ltirole,'instructor')!== false || strpos($ltirole,'administrator')!== false || strpos($ltirole,'contentdeveloper')!== false) {
$ltirole = 'instructor';
} else {
$ltirole = 'learner';
}
$_SESSION['ltirole'] = $ltirole;
$_SESSION['lti_context_id'] = $_REQUEST['context_id'];
$_SESSION['lti_context_label'] = (!empty($_REQUEST['context_label']))?$_REQUEST['context_label']:$_REQUEST['context_id'];
$_SESSION['lti_resource_link_id'] = $_REQUEST['resource_link_id'];
$_SESSION['lti_lis_result_sourcedid'] = $_REQUEST['lis_result_sourcedid'];
$_SESSION['lti_outcomeurl'] = $_REQUEST['lis_outcome_service_url'];
$_SESSION['lti_key'] = $ltikey;
$_SESSION['lti_keytype'] = $keytype;
$_SESSION['lti_keyrights'] = $requestinfo[0]->rights;
$_SESSION['lti_keygroupid'] = intval($requestinfo[0]->groupid);
if (isset($_REQUEST['selection_directive']) && $_REQUEST['selection_directive']=='select_link') {
$_SESSION['selection_return'] = $_REQUEST['launch_presentation_return_url'];
$_SESSION['selection_return_format'] = "Canvas";
}
if (isset($_REQUEST['lti_message_type']) && $_REQUEST['lti_message_type']=='ContentItemSelectionRequest') {
$_SESSION['selection_return'] = $_REQUEST['content_item_return_url'];
$_SESSION['selection_targets'] = $_REQUEST['accept_presentation_document_targets'];
$_SESSION['selection_return_format'] = "IMSdeeplink";
if (isset($_REQUEST['ltiseltype']) && $_REQUEST['ltiseltype']=='assn') {
$_SESSION['selection_type'] = 'assn';
} else if (isset($_REQUEST['ltiseltype']) && $_REQUEST['ltiseltype']=='link') {
$_SESSION['selection_type'] = 'link';
} else {
$_SESSION['selection_type'] = 'all';
}
$_SESSION['selection_data'] = @$_REQUEST['data'];
}
unset($_SESSION['lti_duedate']);
if (!isset($_REQUEST['custom_canvas_assignment_due_at'])) {
if (isset($_REQUEST['custom_assignment_due_at'])) {
$_REQUEST['custom_canvas_assignment_due_at'] = $_REQUEST['custom_assignment_due_at'];
}
}
if (isset($_REQUEST['custom_canvas_assignment_due_at'])) {
$duedate = strtotime($_REQUEST['custom_canvas_assignment_due_at']);
if ($duedate !== false) {
$_SESSION['lti_duedate'] = $duedate;
} else {
$_SESSION['lti_duedate'] = 2000000000;
}
}
//look if we know this user
$orgparts = explode(':',$ltiorg); //THIS was added to avoid issues when LMS GUID change, while still storing it
$shortorg = $orgparts[0]; //we'll only use the part from the lti key
$query = "SELECT lti.userid,iu.FirstName,iu.LastName,iu.email,lti.id FROM imas_ltiusers AS lti LEFT JOIN imas_users as iu ON lti.userid=iu.id ";
$query .= "WHERE lti.org LIKE :org AND lti.ltiuserid=:ltiuserid ";
if ($ltirole!='learner') {
//if they're a teacher, make sure their imathas account is too. If not, we'll act like we don't know them
//and require a new connection
$query .= "AND iu.rights>19 ";
}
//if multiple accounts, use student one first (if not $ltirole of teacher) then higher rights.
//if there was a mixup and multiple records were created, use the first one
$query .= "ORDER BY iu.rights, lti.id";
$stm = $DBH->prepare($query);
$stm->execute(array(':org'=>"$shortorg:%", ':ltiuserid'=>$ltiuserid));
if ($stm->rowCount()>0) { //yup, we know them
$userrow = $stm->fetch(PDO::FETCH_ASSOC);
$userid = $userrow['userid'];
if (((!empty($_REQUEST['lis_person_name_given']) && !empty($_REQUEST['lis_person_name_family'])) || !empty($_REQUEST['lis_person_name_full'])) &&
((count($keyparts)==1 && $ltirole=='learner') || (count($keyparts)>2 && $keyparts[2]==1 && $ltirole=='learner') )) {
if (!empty($_REQUEST['lis_person_name_given']) && !empty($_REQUEST['lis_person_name_family'])) {
$firstname = $_REQUEST['lis_person_name_given'];
$lastname = $_REQUEST['lis_person_name_family'];
} else {
$firstname = '';
$lastname = $_REQUEST['lis_person_name_full'];
}
if (!empty($_REQUEST['lis_person_contact_email_primary'])) {
$email = $_REQUEST['lis_person_contact_email_primary'];
} else {
$email = 'none@none.com';
}
if ($userrow['FirstName'] === null) { //accidentally deleted the imas_users record! Restore it
$query = "INSERT INTO imas_users (id,SID,password,rights,FirstName,LastName,email,msgnotify) VALUES ";
$query .= '(:userid,:SID,:password,:rights,:FirstName,:LastName,:email,0)';
$stm = $DBH->prepare($query);
$stm->execute(array(':userid'=>$userid, ':SID'=>'lti-'.$userrow['id'], ':password'=>'pass' ,':rights'=>10,
':FirstName'=>$firstname,':LastName'=>$lastname,':email'=>$email));
} else if ($firstname != $userrow['FirstName'] || $lastname != $userrow['LastName'] || $email != $userrow['email']) {
//update imas_users record
$stm2 = $DBH->prepare("UPDATE imas_users SET FirstName=?,LastName=?,email=? WHERE id=?");
$stm2->execute(array($firstname, $lastname, $email, $userid));
}
}
} else {
//student is not known. Bummer. Better figure out what to do with them :)
//go ahead and create the account if:
//has name information (should we skip?)
//domain level placement and (student or instructor with acceptable key rights)
//a _1 type placement and (student or instructor with acceptable key rights)
if (((!empty($_REQUEST['lis_person_name_given']) && !empty($_REQUEST['lis_person_name_family'])) || !empty($_REQUEST['lis_person_name_full'])) &&
((count($keyparts)==1 && $ltirole=='learner') || (count($keyparts)>2 && $keyparts[2]==1 && $ltirole=='learner') )) {
if (!empty($_REQUEST['lis_person_name_given']) && !empty($_REQUEST['lis_person_name_family'])) {
$firstname = $_REQUEST['lis_person_name_given'];
$lastname = $_REQUEST['lis_person_name_family'];
} else {
$firstname = '';
$lastname = $_REQUEST['lis_person_name_full'];
}
if (!empty($_REQUEST['lis_person_contact_email_primary'])) {
$email = $_REQUEST['lis_person_contact_email_primary'];
} else {
$email = 'none@none.com';
}
$stm = $DBH->prepare('INSERT INTO imas_ltiusers (org,ltiuserid) VALUES (:org,:ltiuserid)');
$stm->execute(array(':org'=>$ltiorg,':ltiuserid'=>$ltiuserid));
$localltiuser = $DBH->lastInsertId();
if (!isset($userid)) {
//make up a username/password for them
$_POST['SID'] = 'lti-'.$localltiuser;
$md5pw = 'pass'; //totally unusable since not md5'ed
if ($ltirole=='instructor') { //not currently used - no teachers without real usernames/passwords
if (isset($CFG['LTI']['instrrights'])) {
$rights = $CFG['LTI']['instrrights'];
} else {
$rights = 40;
}
$newgroupid = intval($_SESSION['lti_keygroupid']);
$query = "INSERT INTO imas_users (SID,password,rights,FirstName,LastName,email,msgnotify,groupid) VALUES ";
$query .= '(:SID,:password,:rights,:FirstName,:LastName,:email,0,:groupid)';
$stm = $DBH->prepare($query);
$stm->execute(array(':SID'=>$_POST['SID'], ':password'=>$md5pw,':rights'=>$rights,
':FirstName'=>$firstname,':LastName'=>$lastname,':email'=>$email,':groupid'=>$newgroupid));
} else {
$rights = 10;
$query = "INSERT INTO imas_users (SID,password,rights,FirstName,LastName,email,msgnotify) VALUES ";
$query .= '(:SID,:password,:rights,:FirstName,:LastName,:email,0)';
$stm = $DBH->prepare($query);
$stm->execute(array(':SID'=>$_POST['SID'], ':password'=>$md5pw,':rights'=>$rights,
':FirstName'=>$firstname,':LastName'=>$lastname,':email'=>$email));
}
$userid = $DBH->lastInsertId(); //DB $userid = mysql_insert_id();
if ($rights>=20) {
//log new account
$stm = $DBH->prepare("INSERT INTO imas_log (time, log) VALUES (:now, :log)");
$stm->execute(array(':now'=>$now, ':log'=>"New Instructor Request: $userid:: Group: $newgroupid, added via LTI"));
$reqdata = array('added'=>$now, 'actions'=>array(array('on'=>$now, 'status'=>11, 'via'=>'LTI')));
$stm = $DBH->prepare("INSERT INTO imas_instr_acct_reqs (userid,status,reqdate,reqdata) VALUES (?,11,?,?)");
$stm->execute(array($newuserid, $now, json_encode($reqdata)));
}
}
$stm = $DBH->prepare('UPDATE imas_ltiusers SET userid=:userid WHERE id=:localltiuser');
$stm->execute(array(':userid'=>$userid, ':localltiuser'=>$localltiuser));
} else {
////create form asking them for user info
$askforuserinfo = true;
$_SESSION['LMSfirstname'] = $_REQUEST['lis_person_name_given'];
$_SESSION['LMSlastname'] = $_REQUEST['lis_person_name_family'];
if (!empty($_REQUEST['lis_person_contact_email_primary'])) {
$_SESSION['LMSemail'] = $_REQUEST['lis_person_contact_email_primary'];
}
}
}
$_SESSION['ltikey'] = $ltikey;
}
//Do we need to ask for student's info?
//either first connect or bad info on first submit
if ($askforuserinfo == true) {
if (!empty($_REQUEST['tool_consumer_instance_description'])) {
$_SESSION['ltiorgname'] = $_REQUEST['tool_consumer_instance_description'];
}
header('Location: ' . $GLOBALS['basesiteurl'] . "/bltilaunch.php?userinfo=ask");
exit;
}
//if here, we know the local userid.
//if it's a common catridge placement and we're here, then either we're using domain credentials, or
//course credentials for a non-source course.
//see if lti_courses is created
// if not, see if source cid is instructors course
// if so, give option to copy or set lti_course
// if not, create a course copy
//
//see if courseid==source course cid
// if not, copy assessment if needed into course, set placement
// if so, set placement
//determine request type, and check availability
$now = time();
//general placement or common catridge placement - look for placement, or create if know info
$orgparts = explode(':',$_SESSION['ltiorg']); //THIS was added to avoid issues when GUID change, while still storing it
$shortorg = $orgparts[0];
$query = "SELECT placementtype,typeid FROM imas_lti_placements WHERE ";
$query .= "contextid=:contextid AND linkid=:linkid AND typeid>0 AND org LIKE :org";
$stm = $DBH->prepare($query);
$stm->execute(array(':contextid'=>$_SESSION['lti_context_id'], ':linkid'=>$_SESSION['lti_resource_link_id'], ':org'=>"$shortorg:%"));
if ($stm->rowCount()==0) {
if (isset($_SESSION['place_aid'])) {
$stm = $DBH->prepare('SELECT courseid,name FROM imas_assessments WHERE id=:aid');
$stm->execute(array(':aid'=>$_SESSION['place_aid']));
list($aidsourcecid,$aidsourcename) = $stm->fetch(PDO::FETCH_NUM);
if ($aidsourcecid===false) {
$diaginfo = "(Debug info: 2-{$_SESSION['place_aid']})";
reporterror("This assignment does not appear to exist anymore. $diaginfo");
}
//look to see if we've already linked this context_id with a course
$stm = $DBH->prepare('SELECT courseid,copiedfrom FROM imas_lti_courses WHERE contextid=:contextid AND org LIKE :org');
$stm->execute(array(':contextid'=>$_SESSION['lti_context_id'], ':org'=>"$shortorg:%"));
if ($stm->rowCount()==0) {
//if instructor, see if the source course is ours
/***TODO: check rights to see if they have course creation rights or not */
if ($_SESSION['ltirole']=='instructor') {
$copycourse = "notify";
$stm = $DBH->prepare('SELECT id FROM imas_teachers WHERE courseid=:aidsourcecid AND userid=:userid');
$stm->execute(array(':aidsourcecid'=>$aidsourcecid, ':userid'=>$userid));
if ($stm->rowCount()>0) {
$copycourse="ask";
if (isset($_POST['docoursecopy']) && $_POST['docoursecopy']=="useexisting") {
$destcid = $aidsourcecid;
$copycourse = "no";
}
}
$stm = $DBH->prepare('SELECT jsondata,UIver FROM imas_courses WHERE id=:aidsourcecid');
$stm->execute(array(':aidsourcecid'=>$aidsourcecid));
list($aidsourcejsondata,$sourceUIver) = $stm->fetch(PDO::FETCH_NUM);
$aidsourcejsondata = json_decode($aidsourcejsondata, true);
$blockLTICopyOfCopies = ($aidsourcejsondata!==null && !empty($aidsourcejsondata['blockLTICopyOfCopies']));
if (isset($_POST['docoursecopy']) && $_POST['docoursecopy']=="useother" && !empty($_POST['useothercoursecid'])) {
$destcid = $_POST['useothercoursecid'];
$copycourse = "no";
} else if (isset($_POST['docoursecopy']) && $_POST['docoursecopy']=="makecopy") {
$copycourse = "yes";
$sourcecid = $aidsourcecid;
} else if (isset($_POST['docoursecopy']) && $_POST['docoursecopy']=="copyother" && $_POST['othercoursecid']>0) {
$copycourse = "yes";
$sourcecid = Sanitize::onlyInt($_POST['othercoursecid']);
}
if ($copycourse=="notify" || $copycourse=="ask") {
$_SESSION['userid'] = $userid; //remember me
$nologo = true;
$flexwidth = true;
$placeinhead = '<style type="text/css"> ul.nomark {margin-left: 20px;} ul.nomark li {text-indent: -20px;}</style>';
require("header.php");
$query = "SELECT DISTINCT ic.id,ic.name FROM imas_courses AS ic JOIN imas_teachers AS imt ON ic.id=imt.courseid ";
$query .= "AND imt.userid=:userid JOIN imas_assessments AS ia ON ic.id=ia.courseid ";
$query .= "WHERE ic.available<4 AND ic.ancestors REGEXP :cregex AND ia.ancestors REGEXP :aregex ORDER BY ic.name";
$stm = $DBH->prepare($query);
$stm->execute(array(
':userid'=>$userid,
':cregex'=>'[[:<:]]'.$aidsourcecid.'[[:>:]]',
':aregex'=>'[[:<:]]'.$_SESSION['place_aid'].'[[:>:]]'));
$othercourses = array();
while ($row = $stm->fetch(PDO::FETCH_NUM)) {
$othercourses[$row[0]] = $row[1];
}
$advuseother = '';
if (count($othercourses)>0) {
$advuseother .= '<li><a class="small" style="margin-left:20px;" href="#" onclick="$(this).hide().next(\'span\').show();return false;">Show advanced options</a> ';
$advuseother .= '<span style="display:none;"><input name="docoursecopy" type="radio" value="useother" />';
$advuseother .= 'Associate this LMS course with an existing course: ';
$advuseother .= '<select name="useothercoursecid">';
foreach ($othercourses as $k=>$v) {
if ($k==$aidsourcecid) {continue;}
$advuseother .= '<option value="'.$k.'">'.Sanitize::encodeStringForDisplay($v.' (Course ID '.$k.')').'</option>';
}
$advuseother .= '</select>';
$advuseother .= '<br/>Using this option means students in this LMS course will show up in the Roster and Gradebook of the '.$installname.' course you associate it with.</span></li>';
}
echo "<form method=\"post\" action=\"".$imasroot."/bltilaunch.php\">";
if ($copycourse=="ask") {
echo "<p>Your LMS course is not yet associated with a course on $installname. The assignment associated with this
link is located in a $installname course you are already a teacher of (course ID $aidsourcecid).
Would you like to associate this LMS course with that $installname course? This means
that your students in your LMS course will show up in the Roster and Gradebook in that
$installname course. If you don't want to use your existing $installname course,
a copy of the $installname assignments can be made for you automatically and associated with
this LMS course.</p>
<ul class=nomark>
<li><input name=\"docoursecopy\" type=\"radio\" value=\"useexisting\" checked onclick=\"$('#usenew').hide()\" />Associate this LMS course with my existing course (ID $aidsourcecid) on $installname</li>
<li><input name=\"docoursecopy\" type=\"radio\" value=\"makecopy\" onclick=\"$('#usenew').show()\"/>Create a copy of my existing course (ID $aidsourcecid) on $installname</li>";
if (count($othercourses)>0 && !$blockLTICopyOfCopies) {
echo '<li><input name="docoursecopy" type="radio" value="copyother" onclick="$(\'#usenew\').show()" />Create a copy of another course: <select name="othercoursecid">';
foreach ($othercourses as $k=>$v) {
echo '<option value="'.$k.'">'.Sanitize::encodeStringForDisplay($v.' (Course ID '.$k.')').'</option>';
}
echo '</select></li>';
echo $advuseother;
}
echo " </ul>";
if ($sourceUIver == 1) {
echo '<p id="usenew" style="display:none;"><input type="checkbox" name="usenewassess" /> Use new assessment interface (only applies if copying)</p>';
}
echo "<p>The first option is best if this is your first time using this $installname course. The second option
may be preferrable if you have copied the course in your LMS and want your students records to
show in a separate $installname course.</p>
<p><input type=\"submit\" value=\"Continue\"/> (this may take a few moments - please be patient)</p>";
} else {
echo "<p>Your LMS course is not yet associated with a course on $installname. The assignment associated with this
link is located in a $installname course you are not a teacher of (course ID $aidsourcecid).
To use this content, a copy of the assignments will be made for you automatically,
and this LMS course will be associated with that copy in $installname. This will allow you to make changes to the assignments
without affecting the original course, and will ensure your student records are housed in your own
$installname course.</p>";
if (count($othercourses)>0 && !$blockLTICopyOfCopies) {
echo "<ul class=nomark><li><input name=\"docoursecopy\" type=\"radio\" value=\"makecopy\" />Create a copy of the original course (ID $aidsourcecid) on $installname</li>";
echo '<li><input name="docoursecopy" type="radio" value="copyother" />Create a copy of another course: <select name="othercoursecid">';
foreach ($othercourses as $k=>$v) {
echo '<option value="'.$k.'">'.Sanitize::encodeStringForDisplay($v).'</option>';
}
echo '</select></li>';
echo $advuseother;
echo '</ul>';
} else {
echo "<input name=\"docoursecopy\" type=\"hidden\" value=\"makecopy\" />";
}
if ($sourceUIver == 1) {
echo '<p><input type="checkbox" name="usenewassess" /> Use new assessment interface (only applies if copying)</p>';
}
echo "<p><input type=\"submit\" value=\"Create a copy on $installname\"/> (this may take a few moments - please be patient)</p>";
}
echo "</form>";
require("footer.php");
exit;
}
} else {
reporterror("Course link not established yet. Notify your instructor they need to click this assignment to set it up.");
}
if ($copycourse == "yes") {
//create a course
//creating a copy of a template course
$blockcnt = 1;
$itemorder = serialize(array());
$randkey = uniqid();
$hideicons = isset($CFG['CPS']['hideicons'])?$CFG['CPS']['hideicons'][0]:0;
$picicons = isset($CFG['CPS']['picicons'])?$CFG['CPS']['picicons'][0]:0;
$allowunenroll = isset($CFG['CPS']['allowunenroll'])?$CFG['CPS']['allowunenroll'][0]:0;
$copyrights = isset($CFG['CPS']['copyrights'])?$CFG['CPS']['copyrights'][0]:0;
$msgset = isset($CFG['CPS']['msgset'])?$CFG['CPS']['msgset'][0]:0;
$msgmonitor = (floor($msgset/5))&1;
$msgset = $msgset%5;
if (!isset($defaultcoursetheme)) {$defaultcoursetheme = "modern.css";}
$theme = isset($CFG['CPS']['theme'])?$CFG['CPS']['theme'][0]:$defaultcoursetheme;
$showlatepass = isset($CFG['CPS']['showlatepass'])?$CFG['CPS']['showlatepass'][0]:0;
$avail = 0;
$lockaid = 0;
$DBH->beginTransaction();
$query = "INSERT INTO imas_courses (name,ownerid,enrollkey,hideicons,picicons,allowunenroll,copyrights,msgset,showlatepass,itemorder,available,theme,ltisecret,blockcnt) VALUES ";
$query .= "(:name,:ownerid,:enrollkey,:hideicons,:picicons,:allowunenroll,:copyrights,:msgset,:showlatepass,:itemorder,:available,:theme,:ltisecret,:blockcnt)";
$stm = $DBH->prepare($query);
$stm->execute(array(':name'=>$_SESSION['lti_context_label'], ':ownerid'=>$userid, ':enrollkey'=>$randkey, ':hideicons'=>$hideicons, ':picicons'=>$picicons,
':allowunenroll'=>$allowunenroll, ':copyrights'=>$copyrights, ':msgset'=>$msgset, ':showlatepass'=>$showlatepass, ':itemorder'=>$itemorder,
':available'=>$avail, ':theme'=>$theme, ':ltisecret'=>$randkey, ':blockcnt'=>$blockcnt));
$destcid = $DBH->lastInsertId();
//call hook, if defined
if (function_exists('onAddCourse')) {
onAddCourse($destcid, $userid, $myrights, $groupid);
}
$stm = $DBH->prepare('INSERT INTO imas_teachers (userid,courseid) VALUES (:userid,:destcid)');
$stm->execute(array(':userid'=>$userid, ':destcid'=>$destcid));
//DO full course copy
$query = "SELECT useweights,orderby,defaultcat,defgbmode,stugbmode,usersort FROM imas_gbscheme WHERE courseid=:courseid";
$stm = $DBH->prepare($query);