Support ruby-only event handler chains; Add friend/ignore list support and private messaging; Format.

data/plugins/private-messaging/messaging.rb

@@ -0,0 +1,21 @@
+require 'java'
+
+java_import 'org.apollo.game.event.impl.ForwardPrivateMessageEvent'
+java_import 'org.apollo.game.model.World'
+java_import 'org.apollo.game.model.settings.PrivacyState'
+
+on :event, :send_private_message do |ctx, player, event|
+  friend = World.world.get_player(event.username)
+  return unless interaction_permitted(player, friend)
+
+  friend.send(ForwardPrivateMessageEvent.new(player.username, player.privilege_level, event.compressed_message))
+end
+
+# Checks if the sender is permitted to interact with the friend they have added:
+def interaction_permitted(sender, friend)
+  if friend == nil || friend.has_ignored(sender.username)
+  	return false
+  end
+  
+  return friend.friends_with(sender.username) ? friend.friend_privacy != PrivacyState::OFF : friend.friend_privacy == PrivacyState::ON
+end