Integrate auction

Closes #874

app/models/dns/domain_name.rb

@@ -6,8 +6,16 @@ module DNS
       @name = name
     end
 
+    def available?
+      !unavailable?
+    end
+
+    def available_with_code?(code)
+      pending_auction.domain_registrable?(code)
+    end
+
     def unavailable?
-      registered? || blocked? || zone_with_same_origin?
+      at_auction? || awaiting_payment? || registered? || blocked? || zone_with_same_origin?
     end
 
     def unavailability_reason
@@ -17,9 +25,38 @@ module DNS
         :blocked
       elsif zone_with_same_origin?
         :zone_with_same_origin
+      elsif at_auction?
+        :at_auction
+      elsif awaiting_payment?
+        :awaiting_payment
       end
     end
 
+    def sell_at_auction
+      Auction.sell(self)
+      update_whois
+    end
+
+    def at_auction?
+      pending_auction&.started?
+    end
+
+    def awaiting_payment?
+      pending_auction&.awaiting_payment?
+    end
+
+    def pending_registration?
+      pending_auction&.payment_received?
+    end
+
+    def update_whois
+      Whois::Record.refresh(self)
+    end
+
+    def to_s
+      name
+    end
+
     private
 
     attr_reader :name
@@ -35,5 +72,9 @@ module DNS
     def zone_with_same_origin?
       DNS::Zone.where(origin: name).any?
     end
+
+    def pending_auction
+      Auction.pending(self)
+    end
   end
 end