accesslib: get_parent_cats() goes away too...

Not used anymore, and very inefficient.

If you need something like it, use course_category.path
just like we use context.path .

diff --git a/lib/accesslib.php b/lib/accesslib.php
index ca81dc4bc97c295c98a526c7042789270db48cf1..232f6ab2308a18ae3113efa0436f6ad145fccbcb 100755 (executable)
--- a/lib/accesslib.php
+++ b/lib/accesslib.php
@@ -263,92 +263,6 @@ function get_guest_role() {
     }
 }
 
-
-/**
- * This functions get all the course categories in proper order
- * (!)note this only gets course category contexts, and not the site
- * context
- * @param object $context
- * @return array of contextids
- */
-function get_parent_cats($context) {
-    global $COURSE;
-
-    switch ($context->contextlevel) {
-        // a category can be the parent of another category
-        // there is no limit of depth in this case
-        case CONTEXT_COURSECAT:
-            static $categoryparents = null; // cache for parent categories
-            if (!isset($categoryparents)) {
-                $categoryparents = array();
-            }
-            if (array_key_exists($context->instanceid, $categoryparents)) {
-                return $categoryparents[$context->instanceid];
-            }
-
-            if (!$cat = get_record('course_categories','id',$context->instanceid)) {
-                //error?
-                return array();
-            }
-            $parents = array();
-            while (!empty($cat->parent)) {
-                if (!$catcontext = get_context_instance(CONTEXT_COURSECAT, $cat->parent)) {
-                    debugging('Incorrect category parent');
-                    break;
-                }
-                $parents[] = $catcontext->id;
-                $cat = get_record('course_categories','id',$cat->parent);
-            }
-           return $categoryparents[$context->instanceid] = array_reverse($parents);
-        break;
-
-        // a course always fall into a category, unless it's a site course
-        // this happens when SITEID == $course->id
-        // in this case the parent of the course is site context
-        case CONTEXT_COURSE:
-            static $courseparents = null; // cache course parents
-            if (!isset($courseparents)) {
-                $courseparents = array();
-            }
-            if (array_key_exists($context->instanceid, $courseparents)) {
-                return $courseparents[$context->instanceid];
-            }
-
-            if (count($courseparents) > 1000) {
-                $courseparents = array();   // max cache size when looping through thousands of courses
-            }
-
-            if ($context->instanceid == SITEID) {
-                return $courseparents[$context->instanceid] = array(); // frontpage course does not have parent cats
-            }
-            if ($context->instanceid == $COURSE->id) {
-                $course = $COURSE;
-            } else if (!$course = get_record('course', 'id', $context->instanceid)) {
-                //error?
-                return array();;
-            }
-
-            if (empty($course->category)) {
-                // this should not happen
-                return $courseparents[$context->instanceid] = array();
-            }
-
-            if (!$catcontext = get_context_instance(CONTEXT_COURSECAT, $course->category)) {
-                debugging('Incorect course category');
-                return array();;
-            }
-
-            return $courseparents[$context->instanceid] = array_merge(get_parent_cats($catcontext), array($catcontext->id)); //recursion :-)
-        break;
-
-        default:
-            // something is very wrong!
-            return array();
-        break;
-    }
-}
-
-
 function has_capability($capability, $context=NULL, $userid=NULL, $doanything=true) {
     global $USER, $CONTEXT, $ACCESS, $CFG, $DIRTYCONTEXTS;