Add validation of username to not allow capital chars

html/typo3conf/ext/t3omy/Classes/Domain/Validator/ServersideValidator.php

@@ -69,6 +69,10 @@ class ServersideValidator extends \In2code\Femanager\Domain\Validator\Serverside
                                 $this->checkUniqueInLdapValidation($user, $value, $validationSetting, $fieldName);
                                 break;
 
+                            case 'lowerChars':
+                                $this->checkLowerCharsValidation($user, $value, $validationSetting, $fieldName);
+                                break;
+
                             case 'notInOldUserTable':
                                 $this->notInOldUserTableValidation($user, $value, $validationSetting, $fieldName);
                                 break;
@@ -122,6 +126,21 @@ class ServersideValidator extends \In2code\Femanager\Domain\Validator\Serverside
         }
     }
 
+    /**
+     * @param \In2code\Femanager\Domain\Model\User $user
+     * @param string $value
+     * @param array $validationSetting
+     * @param string $fieldName
+     * @return void
+     */
+    protected function checkLowerCharsValidation($user, $value, $validationSetting, $fieldName)
+    {
+        if (preg_match('/[A-Z]/', $value) !== false) {
+            $this->addError(ucfirst($fieldName) . ' may not contain upper case characters!', $fieldName);
+            $this->isValid = false;
+        }
+    }
+
     /**
      * @param \In2code\Femanager\Domain\Model\User $user
      * @param $value

html/typo3conf/ext/t3omy/Configuration/TypoScript/femanager.txt

@@ -14,6 +14,7 @@ plugin.tx_femanager {
                 uniqueInDb = 0
                 uniqueInLdap = 1
                 notInOldUserTable = 1
+                lowerChars = 1
             }
             password {
                 min = 12