1 files changed, 36 insertions, 0 deletions
diff --git a/app/validators/devise_email_validator.rb b/app/validators/devise_email_validator.rb
new file mode 100644
index 00000000000..6ca921ca7fa
--- /dev/null
+++ b/app/validators/devise_email_validator.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+# DeviseEmailValidator
+#
+# Custom validator for email formats. It asserts that there are no
+# @ symbols or whitespaces in either the localpart or the domain, and that
+# there is a single @ symbol separating the localpart and the domain.
+#
+# The available options are:
+# - regexp: Email regular expression used to validate email formats as instance of Regexp class.
+#           If provided value has different type then a new Rexexp class instance is created using the value.
+#           Default: +Devise.email_regexp+
+#
+# Example:
+#   class User < ActiveRecord::Base
+#     validates :personal_email, devise_email: true
+#
+#     validates :public_email, devise_email: { regexp: Devise.email_regexp }
+#   end
+class DeviseEmailValidator < ActiveModel::EachValidator
+  DEFAULT_OPTIONS = {
+    regexp: Devise.email_regexp
+  }.freeze
+
+  def initialize(options)
+    options.reverse_merge!(DEFAULT_OPTIONS)
+
+    raise ArgumentError, "Expected 'regexp' argument of type class Regexp" unless options[:regexp].is_a?(Regexp)
+
+    super(options)
+  end
+
+  def validate_each(record, attribute, value)
+    record.errors.add(attribute, :invalid) unless value =~ options[:regexp]
+  end
+end