admins can forbid some nicknames from being registered

[friendica.git] / src / Model / User.php

diff --git a/src/Model/User.php b/src/Model/User.php
index 6754f220702704ecda759107902e4a12cb1299e4..f1fa32f48df450728e5e156955116693614ecd27 100644 (file)
--- a/src/Model/User.php
+++ b/src/Model/User.php
@@ -304,6 +304,32 @@ class User
                return dba::update('user', $fields, ['uid' => $uid]);
        }
 
+       /**
+        * @brief Checks if a nickname is in the list of the forbidden nicknames
+        *
+        * Check if a nickname is forbidden from registration on the node by the
+        * admin. Forbidden nicknames (e.g. role namess) can be configured in the
+        * admin panel.
+        *
+        * @param string $nickname The nickname that should be checked
+        * @return boolean True is the nickname is blocked on the node
+        */
+       public static function isNicknameBlocked($nickname)
+       {
+               $forbidden_nicknames = Config::get('system', 'forbidden_nicknames', '');
+               // if the config variable is empty return false
+               if (!x($forbidden_nicknames)) {
+                       return false;
+               }
+               // check if the nickname is in the list of blocked nicknames
+               $forbidden = explode(',', $forbidden_nicknames);
+               if (in_array(strtolower($nickname), $forbidden)) {
+                       return true;
+               }
+               // else return false
+               return false;
+       }
+
        /**
         * @brief Catch-all user creation function
         *
@@ -417,6 +443,9 @@ class User
                if (!valid_email($email) || !Network::isEmailDomainValid($email)) {
                        throw new Exception(L10n::t('Not a valid email address.'));
                }
+               if (self::isNicknameBlocked($nickname)) {
+                       throw new Exception(L10n::t('The nickname was blocked from registration by the nodes admin.'));
+               }
 
                if (Config::get('system', 'block_extended_register', false) && dba::exists('user', ['email' => $email])) {
                        throw new Exception(L10n::t('Cannot use that email.'));