From 6d85897f87d846f610b6a5b3bd27e86a13a2d8fe Mon Sep 17 00:00:00 2001
From: stronk7 <stronk7>
Date: Sun, 29 May 2005 18:58:14 +0000
Subject: [PATCH] Added the quizzes_category_used() to detect the list of
 quizzes that are using questions from one category. It relies in the
 quizzes_question_used() function. Will be use in the 'orphan_categories' bug
 (#2459)

(http://moodle.org/bugs/bug.php?op=show&bugid=2459)
---
 mod/quiz/locallib.php | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index 1e5001a0e67..fe02ec49717 100644
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -2465,6 +2465,25 @@ function quizzes_question_used($id) {
     return $quizlist;
 }
 
+/** 
+* Array of names of quizzes a category appears in
+*
+* @return array   Array of quiz names (with quiz->id as array keys)
+* @param integer  Quiz category id
+*/
+function quizzes_category_used($id) {
+
+    $quizlist = array();
+    if ($questions = get_records('quiz_questions', 'category', $id)) {
+        foreach ($questions as $question) {
+            $qlist = quizzes_question_used($question->id);
+            $quizlist = $quizlist + $qlist;
+        }
+    }
+
+    return $quizlist;
+}
+
 /**
 * Parse field names used for the replace options on question edit forms
 */