Make domain unavailable when blocked

app/models/dns/domain_name.rb

@@ -0,0 +1,25 @@
+module DNS
+  # Namespace is needed, because a class with the same name is defined by `domain_name` gem,
+  # a dependency of `actionmailer`,
+  class DomainName
+    def initialize(name)
+      @name = name
+    end
+
+    def unavailable?
+      blocked?
+    end
+
+    def unavailability_reason
+      :blocked if blocked?
+    end
+
+    private
+
+    attr_reader :name
+
+    def blocked?
+      BlockedDomain.where(name: name).any?
+    end
+  end
+end

app/models/epp/domain.rb

@@ -793,23 +793,32 @@ class Epp::Domain < Domain
 
       result = []
 
-      domain_names.each do |domain_name|
-        domain_name.strip!
-        domain_name.downcase!
-        unless DomainNameValidator.validate_format(domain_name)
-          result << { name: domain_name, avail: 0, reason: 'invalid format' }
+      domain_names.each do |domain_name_as_string|
+        domain_name_as_string.strip!
+        domain_name_as_string.downcase!
+
+        unless DomainNameValidator.validate_format(domain_name_as_string)
+          result << { name: domain_name_as_string, avail: 0, reason: 'invalid format' }
           next
         end
 
-        if ReservedDomain.pw_for(domain_name).present?
-          result << { name: domain_name, avail: 0, reason: I18n.t('errors.messages.epp_domain_reserved') }
+        if ReservedDomain.pw_for(domain_name_as_string).present?
+          result << { name: domain_name_as_string, avail: 0, reason: I18n.t('errors.messages.epp_domain_reserved') }
           next
         end
 
-        if Domain.find_by_idn domain_name
-          result << { name: domain_name, avail: 0, reason: 'in use' }
+        domain_name = DNS::DomainName.new(domain_name_as_string)
+
+        if domain_name.unavailable?
+          reason = domain_name.unavailability_reason
+          result << { name: domain_name_as_string, avail: 0, reason: I18n.t("errors.messages.epp_domain_#{reason}") }
+          next
+        end
+
+        if Domain.find_by_idn domain_name_as_string
+          result << { name: domain_name_as_string, avail: 0, reason: 'in use' }
         else
-          result << { name: domain_name, avail: 1 }
+          result << { name: domain_name_as_string, avail: 1 }
         end
       end