From fdf5a1e2fb198876bf34afc61ee0a5570cec9a32 Mon Sep 17 00:00:00 2001
From: moodler <moodler>
Date: Fri, 17 Jan 2003 02:03:42 +0000
Subject: [PATCH] Changes to Course catagery editor to prevent duplicates

---
 course/categories.php | 22 ++++++++++++++++++----
 lang/en/moodle.php    |  1 +
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/course/categories.php b/course/categories.php
index a07f95f3f0..b46a62d3f3 100644
--- a/course/categories.php
+++ b/course/categories.php
@@ -39,17 +39,31 @@
         foreach ($form as $key => $val) {
             if ($key == "new") {
                 if (!empty($val)) {
-                    $cat->name = $val;
-                    if (!insert_record("course_categories", $cat)) {
-                        error("Could not insert the new category '$val'");
+                    if (get_records("course_categories", "name", $val)) {
+                        notify(get_string("categoryduplicate", "", $val));
                     } else {
-                        notify(get_string("categoryadded", "", $val));
+                        $cat->name = $val;
+                        if (!insert_record("course_categories", $cat)) {
+                            error("Could not insert the new category '$val'");
+                        } else {
+                            notify(get_string("categoryadded", "", $val));
+                        }
                     }
                 }
             
             } else {
                 $cat->id   = substr($key,1);
                 $cat->name = $val;
+
+                if ($existingcats = get_records("course_categories", "name", $val)) {
+                    foreach($existingcats as $existingcat) {
+                        if ($existingcat->id != $cat->id) {
+                            notify(get_string("categoryduplicate", "", $val));
+                            continue 2;
+                        }
+                    }
+                }
+
                 if (!update_record("course_categories", $cat)) {
                     error("Could not update the category '$val'");
                 }
diff --git a/lang/en/moodle.php b/lang/en/moodle.php
index a357f0914b..f5496f561a 100644
--- a/lang/en/moodle.php
+++ b/lang/en/moodle.php
@@ -40,6 +40,7 @@ $string['categories'] = "Course categories";
 $string['category'] = "Category";
 $string['categoryadded'] = "The category '\$a' was added";
 $string['categorydeleted'] = "The category '\$a' was deleted";
+$string['categoryduplicate'] = "A category named '\$a' already exists!";
 $string['changepassword'] = "Change password";
 $string['changedpassword'] = "Changed password";
 $string['changessaved'] = "Changes saved";
-- 
2.39.5