factored out function to see if question is used in quiz into the library

diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index 872f3e8d6af979abb2a72cc699c23383ab530c18..4917fa585c13f2c900f5f09f243812b993bb54a6 100644 (file)
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -1372,7 +1372,7 @@ function quiz_print_cat_question_list($categoryid, $quizselected=true, $recurse=
     if ($quizselected) {
         echo "<tr>\n<td colspan=\"3\">";
         echo "<input type=\"submit\" name=\"add\" value=\"<< $straddselectedtoquiz\" />\n";
-        //echo "<input type=\"submit\" name=\"delete\" value=\"XX Delete selected\">";
+        // echo "<input type=\"submit\" name=\"delete\" value=\"XX Delete selected\">";
         echo "<input type=\"button\" onclick=\"checkall()\" value=\"$strselectall\" />\n";
         echo "</td></tr>";
     }
@@ -1884,4 +1884,30 @@ function quiz_categorylist($categoryid) {
     }
     return $categorylist;
 }
+
+// function to determine where question is in use
+function quizzes_question_used( $id, $published=false, $courseid=0 ) {
+  // $id = question id
+  // $published = is category published
+  // $courseid = course id, required only if $published=true
+  // returns array of names of quizzes it appears in
+  if ($published) {
+    $quizzes = get_records("quiz");
+  }
+  else {
+    $quizzes = get_records("quiz","course",$courseid);
+  }
+  $beingused = array();
+  if ($quizzes) {
+    foreach ($quizzes as $quiz) {
+      $questions = explode(',', $quiz->questions);
+      foreach ($questions as $question) {
+        if ($question==$id) {
+          $beingused[] = $quiz->name;
+        }
+      }
+    }
+  }
+  return $beingused;
+}
 ?>