1 files changed, 53 insertions, 0 deletions
diff --git a/app/validators/dynamic_path_validator.rb b/app/validators/dynamic_path_validator.rb
new file mode 100644
index 00000000000..4688aabc2a8
--- /dev/null
+++ b/app/validators/dynamic_path_validator.rb
@@ -0,0 +1,53 @@
+# DynamicPathValidator
+#
+# Custom validator for GitLab path values.
+# These paths are assigned to `Namespace` (& `Group` as a subclass) & `Project`
+#
+# Values are checked for formatting and exclusion from a list of illegal path
+# names.
+class DynamicPathValidator < ActiveModel::EachValidator
+  extend Gitlab::EncodingHelper
+
+  class << self
+    def valid_user_path?(path)
+      encode!(path)
+      "#{path}/" =~ Gitlab::PathRegex.root_namespace_path_regex
+    end
+
+    def valid_group_path?(path)
+      encode!(path)
+      "#{path}/" =~ Gitlab::PathRegex.full_namespace_path_regex
+    end
+
+    def valid_project_path?(path)
+      encode!(path)
+      "#{path}/" =~ Gitlab::PathRegex.full_project_path_regex
+    end
+  end
+
+  def path_valid_for_record?(record, value)
+    full_path = record.respond_to?(:build_full_path) ? record.build_full_path : value
+
+    return true unless full_path
+
+    case record
+    when Project
+      self.class.valid_project_path?(full_path)
+    when Group
+      self.class.valid_group_path?(full_path)
+    else # User or non-Group Namespace
+      self.class.valid_user_path?(full_path)
+    end
+  end
+
+  def validate_each(record, attribute, value)
+    unless value =~ Gitlab::PathRegex.namespace_format_regex
+      record.errors.add(attribute, Gitlab::PathRegex.namespace_format_message)
+      return
+    end
+
+    unless path_valid_for_record?(record, value)
+      record.errors.add(attribute, "#{value} is a reserved name")
+    end
+  end
+end