Resolve "Die LTI-1.1-Integration funktioniert seit 6.0 nicht mehr."

Closes #6174

Merge request studip/studip!4676

3 files changed, 47 insertions, 39 deletions

diff --git a/app/controllers/course/lti.php b/app/controllers/course/lti.php
index 172461f..8dfdff0 100644
--- a/app/controllers/course/lti.php
+++ b/app/controllers/course/lti.php
@@ -14,6 +14,7 @@ use Studip\LTI13a\PlatformManager;
 use Studip\LTI13a\Registration;
 use Studip\LTI13a\RegistrationManager;
 use OAT\Library\Lti1p3Core\Message\Payload\MessagePayloadInterface\MessagePayloadInterface;
+use LtiResourceLink as LtiResourceLinkModel;
 
 /**
  * course/lti.php - LTI consumer API for Stud.IP
@@ -274,12 +275,10 @@ class Course_LtiController extends StudipController
 
         if (!$this->show_data_protection_info) {
             //Redirect to the tool.
-            $this->lti13a_mode = false;
-            $lti_version = $this->resource_link->deployment->getToolLtiVersion();
-            if ($lti_version === '1.3a') {
-                //LTI 1.3a
-                $this->lti13a_mode = true;
+            $this->version = $this->resource_link->deployment->getToolLtiVersion();
 
+            //LTI 1.3a
+            if ($this->version === '1.3a') {
                 $return_url = URLHelper::getURL($GLOBALS['ABSOLUTE_URI_STUDIP'] . 'dispatch.php/course/lti', ['deployment_id' => $this->resource_link->deployment_id]);
                 $document_target = 'window';
                 if (!empty($this->resource_link->options['document_target'])) {
@@ -336,14 +335,17 @@ class Course_LtiController extends StudipController
                         $this->resource_link->getCustomLtiParameterArray(),
                     )
                 );
-            } else {
-                //LTI 1.0/1.1
+            }
+
+            //LTI 1.0/1.1
+            if ($this->version === '1.1') {
                 $this->deployment = $this->resource_link->deployment;
-                $lti_link = $this->getLtiLink($this->deployment);
+                $lti_link = $this->getLtiLink($this->deployment, $this->resource_link);
                 $this->launch_url = $this->deployment->getLaunchURL();
                 $this->launch_data = $lti_link->getBasicLaunchData();
                 $this->signature = $lti_link->getLaunchSignature($this->launch_data);
             }
+
             $this->set_layout(null);
         }
     }
@@ -544,7 +546,7 @@ class Course_LtiController extends StudipController
 
             // set up ContentItemSelectionRequest
             $lti_link = new LtiLink($this->tool->launch_url, $this->tool->consumer_key, $this->tool->consumer_secret, $this->tool->oauth_signature_method);
-            $lti_link->setUser($GLOBALS['user']->id, 'Instructor', $this->tool->send_lis_person);
+            $lti_link->setUser(User::findCurrent(), 'Instructor', $this->tool->send_lis_person);
             $lti_link->setCourse($this->course_id);
             $lti_link->addLaunchParameters([
                 'lti_message_type' => 'ContentItemSelectionRequest',
@@ -691,44 +693,47 @@ class Course_LtiController extends StudipController
     /**
      * Return an LtiLink object for the configured LTI content block.
      *
-     * @param   LtiDeployment $lti_data data of LTI content block
+     * @param LtiDeployment $ltiDeployment data of LTI content block
+     * @param LtiResourceLinkModel $resourceLink
      *
-     * @return  LtiLink  LTI link representation
+     * @return LtiLink  LTI link representation
      */
-    public function getLtiLink($lti_data)
+    public function getLtiLink(LtiDeployment $ltiDeployment, LtiResourceLinkModel $resourceLink): LtiLink
     {
-        $launch_url = $lti_data->getLaunchURL();
-        $consumer_key = $lti_data->getConsumerKey();
-        $consumer_secret = $lti_data->getConsumerSecret();
-        $oauth_signature_method = $lti_data->getOauthSignatureMethod();
+        $authUser = User::findCurrent();
+        $ltiRole = $this->edit_perm ? 'Instructor' : 'Learner';
 
-        $roles = $this->edit_perm ? 'Instructor' : 'Learner';
-        $custom_parameters = explode("\n", $lti_data->getCustomParameters());
-        $description = kill_format($lti_data->description);
-        $lis_outcome_service_url = $this->url_for('course/lti/outcome/' . $lti_data->id, ['cid' => null]);
-        $tc_profile_url = $this->url_for('course/lti/profile/' . $lti_data->id, ['cid' => null]);
+        $customParameters = explode("\n", $ltiDeployment->getCustomParameters());
+        $lisOutcomeServiceUrl = $this->url_for('course/lti/outcome/' . $ltiDeployment->id, ['cid' => null]);
+        $tcProfileUrl = $this->url_for('course/lti/profile/' . $ltiDeployment->id, ['cid' => null]);
 
         // set up launch request
-        $lti_link = new LtiLink($launch_url, $consumer_key, $consumer_secret, $oauth_signature_method);
-        $lti_link->setResource($lti_data->id, $lti_data->title, $description);
-        $lti_link->setUser($GLOBALS['user']->id, $roles, $lti_data->getSendLisPerson());
-        $lti_link->setCourse($lti_data->course_id);
-        $lti_link->addVariable('ToolConsumerProfile.url', $tc_profile_url);
-        $lti_link->addLaunchParameters([
+        $ltiLink = new LtiLink(
+            $ltiDeployment->getLaunchURL(),
+            $ltiDeployment->getConsumerKey(),
+            $ltiDeployment->getConsumerSecret(),
+            $ltiDeployment->getOauthSignatureMethod()
+        );
+
+        $ltiLink->setResource($ltiDeployment->id, $resourceLink->title, kill_format($resourceLink->description));
+        $ltiLink->setUser($authUser, $ltiRole, $ltiDeployment->getSendLisPerson());
+        $ltiLink->setCourse($resourceLink->course_id);
+        $ltiLink->addVariable('ToolConsumerProfile.url', $tcProfileUrl);
+        $ltiLink->addLaunchParameters([
             'launch_presentation_locale' => str_replace('_', '-', $_SESSION['_language']),
-            'launch_presentation_document_target' => $lti_data->options['document_target'],
-            'lis_outcome_service_url' => $lis_outcome_service_url,
-            'lis_result_sourcedid' => $GLOBALS['user']->id
+            'launch_presentation_document_target' => $resourceLink->options['document_target'],
+            'lis_outcome_service_url' => $lisOutcomeServiceUrl,
+            'lis_result_sourcedid' => $authUser->id
         ]);
 
-        foreach ($custom_parameters as $param) {
+        foreach ($customParameters as $param) {
             if (strpos($param, '=') !== false) {
                 [$key, $value] = explode('=', $param, 2);
-                $lti_link->addCustomParameter(trim($key), trim($value));
+                $ltiLink->addCustomParameter(trim($key), trim($value));
             }
         }
 
-        return $lti_link;
+        return $ltiLink;
     }
 
     /**
diff --git a/app/controllers/courseware/lti.php b/app/controllers/courseware/lti.php
index 93159cc..53ec44b 100644
--- a/app/controllers/courseware/lti.php
+++ b/app/controllers/courseware/lti.php
@@ -79,7 +79,7 @@ class Courseware_LtiController extends AuthenticatedController
         // Create LTI Link for setting up launch request
         $lti_link = new LtiLink($launch_url, $consumer_key, $consumer_secret, $oauth_signature_method);
         $lti_link->setResource($id, $title);
-        $lti_link->setUser($GLOBALS['user']->id, $roles, $send_lis_person);
+        $lti_link->setUser(User::findCurrent(), $roles, $send_lis_person);
         $lti_link->setCourse($range_id);
         $lti_link->addLaunchParameters([
             'launch_presentation_locale' => str_replace('_', '-', $_SESSION['_language']),
diff --git a/app/views/course/lti/iframe.php b/app/views/course/lti/iframe.php
index 79cbd60..777cd78 100644
--- a/app/views/course/lti/iframe.php
+++ b/app/views/course/lti/iframe.php
@@ -4,7 +4,7 @@
  * @var ?LtiResourceLink $resource_link
  * @var array $launch_data
  * @var string $signature
- * @var bool $lti13a_mode
+ * @var string $version
  * @var \OAT\Library\Lti1p3Core\Message\LtiMessage $message
  */
 ?>
@@ -13,20 +13,23 @@
     <html>
     <head>
     <meta charset="UTF-8">
-        <? if (!$lti13a_mode) : ?>
+        <? if ($version === '1.1') : ?>
             <script type="text/javascript">
-                window.onload=document.ltiLaunchForm.submit();
+                document.addEventListener("DOMContentLoaded", function () {
+                    document.ltiLaunchForm.submit();
+                });
             </script>
         <? endif ?>
     </head>
     <body>
-        <? if ($lti13a_mode) : ?>
+        <? if ($version === '1.3a'): ?>
             <? if ($message) : ?>
                 <?= $message->toHtmlRedirectForm(Request::submitted('do_not_send') ? false : true) ?>
             <? else: ?>
                 <?= _('Das LTI-Tool kann nicht aufgerufen werden.') ?>
             <? endif ?>
-        <? else : ?>
+        <? endif ?>
+        <? if ($version === '1.1'): ?>
             <form name="ltiLaunchForm" method="post" action="<?= htmlReady($resource_link->deployment->getLaunchUrl()) ?>">
                 <? foreach ($launch_data as $key => $value): ?>
                     <input type="hidden" name="<?= htmlReady($key) ?>" value="<?= htmlReady($value, false) ?>">