From 7a5f3762d09f608b3c0d3023de2d3eccfb53f543 Mon Sep 17 00:00:00 2001
From: Paul Nicholls <paul.nicholls@canterbury.ac.nz>
Date: Fri, 12 Apr 2013 16:40:12 +1200
Subject: [PATCH] MDL-37762: Breadcrumb not showing categories on course page

---
 lib/navigationlib.php | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/lib/navigationlib.php b/lib/navigationlib.php
index 40a453e459b..7e00815a9ad 100644
--- a/lib/navigationlib.php
+++ b/lib/navigationlib.php
@@ -3052,6 +3052,12 @@ class navbar extends navigation_node {
                     if (!$navigationactivenode->mainnavonly) {
                         $items[] = $navigationactivenode;
                     }
+                    if ($navigationactivenode->type === self::TYPE_COURSE && $navigationactivenode->parent->key === 'currentcourse') {
+                        $categories = $this->get_course_categories();
+                        foreach ($categories as $category) {
+                            $items[] = $category;
+                        }
+                    }
                     $navigationactivenode = $navigationactivenode->parent;
                 }
             } else if ($navigationactivenode) {
@@ -3060,6 +3066,12 @@ class navbar extends navigation_node {
                     if (!$navigationactivenode->mainnavonly) {
                         $items[] = $navigationactivenode;
                     }
+                    if ($navigationactivenode->type === self::TYPE_COURSE && $navigationactivenode->parent->key === 'currentcourse') {
+                        $categories = $this->get_course_categories();
+                        foreach ($categories as $category) {
+                            $items[] = $category;
+                        }
+                    }
                     $navigationactivenode = $navigationactivenode->parent;
                 }
             } else if ($settingsactivenode) {
@@ -3084,6 +3096,32 @@ class navbar extends navigation_node {
         return $this->items;
     }
 
+    /**
+     * Get the list of categories leading to this course.
+     *
+     * This function is used by {@link navbar::get_items()} to add back the "courses"
+     * node and category chain leading to the current course.  Note that this is only ever
+     * called for the current course, so we don't need to bother taking in any parameters.
+     *
+     * @return array
+     */
+    private function get_course_categories() {
+        $categories = array();
+        $id = $this->page->course->category;
+        while ($id) {
+            $category = coursecat::get($id);
+            $categories[] = new navigation_node(array(
+                'text'=>$category->name,
+                'shorttext'=>$category->name,
+                'key'=>$category->idnumber,
+                'action'=>new moodle_url('/course/category.php', array('id'=>$id))
+            ));
+            $id = $category->parent;
+        }
+        $categories[] = $this->page->navigation->get('courses');
+        return $categories;
+    }
+
     /**
      * Add a new navigation_node to the navbar, overrides parent::add
      *