Implement domain transfer API

#660

app/api/repp/domain_transfers_v1.rb

@@ -4,13 +4,44 @@ module Repp
 
     resource :domain_transfers do
       post '/' do
-        params['domainTransfers'].each do |domain_transfer|
+        params do
+          requires :data, type: Hash do
+            requires :domainTransfers, type: Array do
+              requires :domainName, type: String, allow_blank: false
+              requires :transferCode, type: String, allow_blank: false
+            end
+          end
+        end
+
+        new_registrar = current_user.registrar
+        request_domain_transfers = params['data']['domainTransfers']
+        response_domain_transfers = []
+        errors = []
+
+        request_domain_transfers.each do |domain_transfer|
           domain_name = domain_transfer['domainName']
           transfer_code = domain_transfer['transferCode']
-          new_registrar = current_user.registrar
-
           domain = Domain.find_by(name: domain_name)
-          domain.transfer(registrar: new_registrar)
+
+          if domain
+            if domain.transfer_code == transfer_code
+              domain.transfer(new_registrar)
+            else
+              errors << { title: "#{domain_name} transfer code is wrong" }
+            end
+
+          else
+            errors << { title: "#{domain_name} does not exist" }
+          end
+
+          response_domain_transfers << { domainName: domain_name }
+        end
+
+        if errors.none?
+          status 204
+        else
+          status 400
+          { errors: errors }
         end
       end
     end