Usergroup (clases) have unique names in creation see BT#8689

main/admin/usergroup_import.php

@@ -1,13 +1,10 @@
 <?php
 /* For licensing terms, see /license.txt */
 /**
+ *  This tool allows platform admins to add classes by uploading a CSV file
+ *  @todo Add some langvars to DLTT
  * 	@package chamilo.admin
  */
-/**
- * Code
- *   This     tool allows platform admins to add classes by uploading a CSV file
- * @todo Add some langvars to DLTT
- */
 
 /**
  * Validates imported data.
@@ -21,23 +18,29 @@ function validate_data($classes) {
             $class['line'] = $index + 2;
             $class['error'] = get_lang('MissingClassName');
             $errors[] = $class;
-        }
-        // 2. Check whether class doesn't exist yet.
-        else {
+        } else {
+            // 2. Check whether class doesn't exist yet.
             if ($usergroup->usergroup_exists($class['name'])) {
                 $class['line'] = $index + 2;
-                $class['error'] = get_lang('ClassNameExists') . ' <strong>' . $class['ClassName'] . '</strong>';
+                $class['error'] = get_lang('ClassNameExists') .
+                    ': <strong>' .$class['name'] . '</strong>';
                 $errors[] = $class;
             }
         }
     }
+
     return $errors;
 }
 
 /**
  * Save imported class data to database
+ *
+ * @param $classes
+ *
+ * @return int
  */
-function save_data($classes) {
+function save_data($classes)
+{
     $number_of_added_classes = 0;
     $usergroup = new UserGroup();
     foreach ($classes as $index => $class) {
@@ -115,4 +118,4 @@ $form->display();
 </pre>
 <?php
 // Displaying the footer.
-Display :: display_footer();
+Display :: display_footer();

main/admin/usergroups.php

@@ -121,6 +121,11 @@ if (isset($_GET['action']) && $_GET['action'] == 'add') {
             $res = $usergroup->save($values);
             if ($res) {
                 Display::display_confirmation_message(get_lang('ItemAdded'));
+            } else {
+                Display::display_warning_message(
+                    Security::remove_XSS($values['name']).': '.
+                    get_lang('AlreadyExists')
+                );
             }
         }
         Security::clear_token();
@@ -140,7 +145,7 @@ if (isset($_GET['action']) && $_GET['action'] == 'add') {
     $form = new FormValidator('career', 'post', api_get_self().'?action='.Security::remove_XSS($_GET['action']).'&id='.Security::remove_XSS($_GET['id']));
     // Setting the form elements
     $form->addElement('header', '', get_lang('Modify'));
-    $form->addElement('hidden', 'id',intval($_GET['id']));
+    $form->addElement('hidden', 'id', intval($_GET['id']));
     $form->addElement('text', 'name', get_lang('Name'), array('size' => '70'));
     $form->add_html_editor('description', get_lang('Description'), false, false, array('Width' => '95%', 'Height' => '250'));
     $form->addElement('style_submit_button', 'submit', get_lang('Modify'), 'class="save"');

main/inc/lib/usergroup.lib.php

@@ -749,15 +749,20 @@ class UserGroup extends Model
     /**
      * @param $params
      * @param bool $show_query
-     * @return bool|void
+     * @return bool|int
      */
     public function save($params, $show_query = false)
     {
-        $id = parent::save($params, $show_query);
-        if ($this->useMultipleUrl) {
-            $this->subscribeToUrl($id, api_get_current_access_url_id());
+        $groupExists = $this->usergroup_exists(trim($params['name']));
+        if ($groupExists == false) {
+            $id = parent::save($params, $show_query);
+            if ($this->useMultipleUrl) {
+                $this->subscribeToUrl($id, api_get_current_access_url_id());
+            }
+            return $id;
         }
-        return $id;
+
+        return false;
     }
 
     /**