1 files changed, 50 insertions, 0 deletions
diff --git a/app/validators/namespace_validator.rb b/app/validators/namespace_validator.rb
new file mode 100644
index 00000000000..10e35ce665a
--- /dev/null
+++ b/app/validators/namespace_validator.rb
@@ -0,0 +1,50 @@
+# NamespaceValidator
+#
+# Custom validator for GitLab namespace values.
+#
+# Values are checked for formatting and exclusion from a list of reserved path
+# names.
+class NamespaceValidator < ActiveModel::EachValidator
+  RESERVED = %w(
+    admin
+    all
+    assets
+    ci
+    dashboard
+    files
+    groups
+    help
+    hooks
+    issues
+    merge_requests
+    notes
+    profile
+    projects
+    public
+    repository
+    s
+    search
+    services
+    snippets
+    teams
+    u
+    unsubscribes
+    users
+  ).freeze
+
+  def validate_each(record, attribute, value)
+    unless value =~ Gitlab::Regex.namespace_regex
+      record.errors.add(attribute, Gitlab::Regex.namespace_regex_message)
+    end
+
+    if reserved?(value)
+      record.errors.add(attribute, "#{value} is a reserved name")
+    end
+  end
+
+  private
+
+  def reserved?(value)
+    RESERVED.include?(value)
+  end
+end