MDL-59668 mod_lti: trigger completion event in view.php

This was done so that the navigation links are rendered
correctly with accurate completion info.

Part of MDL-59313.

mod/lti/launch.php

@@ -51,6 +51,7 @@
 require_once($CFG->dirroot.'/mod/lti/locallib.php');
 
 $id = required_param('id', PARAM_INT); // Course Module ID.
+$triggerview = optional_param('triggerview', 1, PARAM_BOOL);
 
 $cm = get_coursemodule_from_id('lti', $id, 0, false, MUST_EXIST);
 $lti = $DB->get_record('lti', array('id' => $cm->instance), '*', MUST_EXIST);
@@ -62,7 +63,9 @@
 require_capability('mod/lti:view', $context);
 
 // Completion and trigger events.
-lti_view($lti, $course, $cm, $context);
+if ($triggerview) {
+    lti_view($lti, $course, $cm, $context);
+}
 
 $lti->cmid = $cm->id;
 lti_launch_tool($lti);

mod/lti/view.php

@@ -94,6 +94,8 @@
     $PAGE->set_pagelayout('incourse');
 }
 
+lti_view($lti, $course, $cm, $context);
+
 $pagetitle = strip_tags($course->shortname.': '.format_string($lti->name));
 $PAGE->set_title($pagetitle);
 $PAGE->set_heading($course->fullname);
@@ -112,7 +114,7 @@
 
 if ( $launchcontainer == LTI_LAUNCH_CONTAINER_WINDOW ) {
     echo "<script language=\"javascript\">//<![CDATA[\n";
-    echo "window.open('launch.php?id=".$cm->id."','lti-".$cm->id."');";
+    echo "window.open('launch.php?id=".$cm->id."&triggerview=0','lti-".$cm->id."');";
     echo "//]]\n";
     echo "</script>\n";
     echo "<p>".get_string("basiclti_in_new_window", "lti")."</p>\n";
@@ -122,7 +124,7 @@
     echo html_writer::end_tag('p');
 } else {
     // Request the launch content with an iframe tag.
-    echo '<iframe id="contentframe" height="600px" width="100%" src="launch.php?id='.$cm->id.'"></iframe>';
+    echo '<iframe id="contentframe" height="600px" width="100%" src="launch.php?id='.$cm->id.'&triggerview=0"></iframe>';
 
     // Output script to make the iframe tag be as large as possible.
     $resize = '