Introduce Response.apportion and use it in Channel#respond_to_names

lib/hector/channel.rb

@@ -73,7 +73,8 @@ def respond_to_topic(session)
     end
 
     def respond_to_names(session)
-      session.respond_with(353, session.nickname, "=", name, :source => "hector.irc", :text => nicknames.join(" "))
+      names_responses = Response.apportion(nicknames, 353, session.nickname, "=", name, :source => "hector.irc")
+      names_responses.each {|nr| session.respond_with(nr)}
       session.respond_with(366, session.nickname, name, :source => "hector.irc", :text => "End of /NAMES list.")
     end
 

lib/hector/response.rb

@@ -1,6 +1,7 @@
 module Hector
   class Response
-    attr_reader :command, :args, :text, :source
+    attr_reader :command, :args, :source
+    attr_accessor :text
 
     def initialize(command, *args)
       @command = command.to_s.upcase
@@ -12,12 +13,28 @@ def initialize(command, *args)
     end
 
     def to_s
-      @to_s ||= [].tap do |line|
+      [].tap do |line|
         line.push(":#{source}") if source
         line.push(command)
         line.concat(args)
         line.push(":#{text}") if text
       end.join(" ")[0, 510] + "\r\n"
     end
+
+    def self.apportion(args, *base_args)
+      [].tap do |responses|
+        base_response = Response.new(*base_args)
+        unprocessed_args = args.reverse
+        while unprocessed_args.length > 0
+          this_response_text = []
+          while (base_response.to_s.length + this_response_text.join(" ").length) < 512
+            this_response_text << unprocessed_args.pop
+          end
+          this_response = base_response.dup
+          this_response.text = this_response_text.join(" ")
+          responses << this_response
+        end
+      end
+    end
   end
 end