From 3a7005c9643a0780cb65bd7f7d8d95ea58d9871c Mon Sep 17 00:00:00 2001
From: Simey Lameze <simey@moodle.com>
Date: Fri, 2 Mar 2018 12:21:54 +0800
Subject: [PATCH] MDL-61410 question: support course tags on export

---
 question/format/xml/format.php | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/question/format/xml/format.php b/question/format/xml/format.php
index efd209c6579..63ae9f56777 100644
--- a/question/format/xml/format.php
+++ b/question/format/xml/format.php
@@ -1467,10 +1467,31 @@ class qformat_xml extends qformat_default {
         $expout .= $this->write_hints($question);
 
         // Write the question tags.
-        $tags = core_tag_tag::get_item_tags_array('core_question', 'question', $question->id);
-        if (!empty($tags)) {
+        // If the question has course tags then we need to filter them to only
+        // include the tags for this course.
+        get_question_options($question, true);
+        if (isset($question->coursetagobjects)) {
+            // Get the tag objects for the course being viewed.
+            $courseid = $this->course->id;
+            $coursecontext = context_course::instance($courseid);
+
+            $coursetagobjects = array_filter(
+                $question->coursetagobjects,
+                function($tagobject) use ($coursecontext) {
+                    return $coursecontext->id == $tagobject->taginstancecontextid;
+                }
+            );
+
+            // Set them on the form to be rendered as existing tags.
+            $expout .= "    <coursetags>\n";
+            foreach ($coursetagobjects as $tagobject) {
+                $expout .= "      <tag>" . $this->writetext($tagobject->get_display_name(), 0, true) . "</tag>\n";
+            }
+            $expout .= "    </coursetags>\n";
+        }
+        if (!empty($question->tags)) {
             $expout .= "    <tags>\n";
-            foreach ($tags as $tag) {
+            foreach ($question->tags as $tag) {
                 $expout .= "      <tag>" . $this->writetext($tag, 0, true) . "</tag>\n";
             }
             $expout .= "    </tags>\n";