Add ISO 8601 validations

app/models/keyrelay.rb

@@ -1,8 +1,34 @@
 class Keyrelay < ActiveRecord::Base
+  include EppErrors
+
   belongs_to :domain
 
   belongs_to :requester, class_name: 'Registrar'
   belongs_to :accepter, class_name: 'Registrar'
 
   delegate :name, to: :domain, prefix: true
+
+  validates :expiry_relative, duration_iso8601: true
+
+  def epp_code_map
+    {
+      '2005' => [
+        [:expiry_relative, :unknown_pattern, { value: { obj: 'relative', val: expiry_relative } }]
+      ]
+    }
+  end
+
+  def status
+    if expiry_relative
+      exp_date = pa_date + ISO8601::Duration.new(expiry_relative).to_seconds
+    elsif expiry_absolute
+      exp_date = expiry_positive
+    end
+
+    if Time.now > exp_date
+      return 'expired'
+    else
+      return 'pending'
+    end
+  end
 end