Create new top-level chat folder.

data/plugins/chat/privacy/plugin.xml

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+<?xml version="1.0"?>
+<plugin>
+  <id>chat-privacy</id>
+  <version>1</version>
+  <name>Chat privacy</name>
+  <description>Adds chat privacy support.</description>
+  <authors>
+    <author>Major</author>
+  </authors>
+  <scripts>
+    <script>privacy.rb</script>
+  </scripts>
+  <dependencies>
+    <dependency>private-messaging</dependency>
+  </dependencies>
+</plugin>

data/plugins/chat/privacy/privacy.rb

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+require 'java'
+
+java_import 'org.apollo.game.model.setting.PrivacyState'
+java_import 'org.apollo.game.event.impl.SendFriendEvent'
+
+on :event, :privacy_option do |ctx, player, event|
+  player.chat_privacy = event.chat_privacy
+  player.friend_privacy = event.friend_privacy
+  player.trade_privacy = event.trade_privacy
+
+  update_friends(player, event.friend_privacy == PrivacyState::OFF ? 0 : player.world_id)
+end

data/plugins/chat/private-messaging/friend.rb

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+require 'java'
+
+java_import 'org.apollo.game.event.impl.FriendServerStatusEvent'
+java_import 'org.apollo.game.event.impl.SendFriendEvent'
+java_import 'org.apollo.game.model.World'
+java_import 'org.apollo.game.model.setting.ServerStatus'
+java_import 'org.apollo.game.model.setting.PrivacyState'
+java_import 'org.apollo.game.model.entity.Player'
+
+
+# Processes an add friend event, updating the logged-in status of the player (and the person they added) if necessary.
+on :event, :add_friend do |ctx, player, event|
+  friend_username = event.username
+  player_username = player.username
+
+  player.add_friend(friend_username)
+  friend = World.world.get_player(friend_username)
+
+  if friend == nil # the friend the player added is offline
+    player.send(SendFriendEvent.new(friend_username, 0))
+  elsif friend.friends_with(player_username) # new friend already has the player added
+    friend.send(SendFriendEvent.new(player_username, player.world_id)) unless player.friend_privacy == PrivacyState::OFF # player's private chat state is not off, so notify the friend
+
+    player.send(SendFriendEvent.new(friend_username, friend.world_id)) unless friend.friend_privacy == PrivacyState::OFF # new friend's private chat state is not off, so notify the player
+  elsif friend.friend_privacy == PrivacyState::ON # new friend doesn't have the player added but their private chat state is on
+   player.send(SendFriendEvent.new(friend_username, friend.world_id)) # so we can let the player know what world they're on
+  end
+end
+
+# Processes a remove friend event, updating the logged-in status of the player if necessary.
+on :event, :remove_friend do |ctx, player, event|
+  friend_username = event.username
+  player_username = player.username
+
+  player.remove_friend(friend_username)
+  if (World.world.is_player_online(friend_username))
+    friend = World.world.get_player(friend_username)
+    friend.send(SendFriendEvent.new(player_username, 0)) if (friend.friends_with(player_username) && player.friend_privacy != PrivacyState::ON)
+  end
+end
+
+# Update the friend server status and send the friend/ignore lists of the player logging in.
+on :login do |player|
+  player.send(FriendServerStatusEvent.new(ServerStatus::CONNECTING))
+  player.send(IgnoreListEvent.new(player.ignored_usernames)) if player.ignored_usernames.size > 0
+
+  username = player.username
+  world = World.world
+  iterator = player.friend_usernames.iterator # Iterate the player's friend list and notify the player that they are online if they are
+  while iterator.has_next
+    friend_username = iterator.next
+    friend = world.get_player(friend_username)
+    friend_world_id = (friend == nil || !viewable?(friend, username)) ? 0 : friend.world_id
+
+    player.send(SendFriendEvent.new(friend_username, friend_world_id))
+  end
+
+  player.send(FriendServerStatusEvent.new(ServerStatus::ONLINE))
+  update_friends(player, player.world_id)
+end
+
+# Notifies the player's friends that the player has logged out.
+on :logout do |player|
+  update_friends(player, 0)
+end
+
+
+# Notifies the currently logged in players that the specified player has logged into the specified world, unless the 
+# newly logged-in player has their friend privacy state set to 'off'.
+def update_friends(player, world=0)
+  privacy = player.friend_privacy
+  
+  iterator = World.world.player_repository.iterator
+  username = player.username
+
+  while iterator.has_next
+    other = iterator.next
+    next if (!other.friends_with(username) || other == player)
+
+    world = viewable?(player, other.username) ? world : 0
+    other.send(SendFriendEvent.new(username, world))
+  end
+end
+
+# Checks if the specified player can be viewed by the player with the specified other username
+def viewable?(player, other_username)
+  privacy = player.friend_privacy
+  return privacy != PrivacyState::OFF && player.friends_with(other_username) || privacy == PrivacyState::ON
+end

data/plugins/chat/private-messaging/ignore.rb

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+on :event, :add_ignore do |ctx, player, event|
+  username = event.username
+  player.add_ignore(username)
+end
+
+on :event, :remove_ignore do |ctx, player, event|
+  username = event.username
+  player.remove_ignore(username)
+end

data/plugins/chat/private-messaging/messaging.rb

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+require 'java'
+
+java_import 'org.apollo.game.event.impl.ForwardPrivateMessageEvent'
+java_import 'org.apollo.game.model.World'
+java_import 'org.apollo.game.model.setting.PrivacyState'
+
+on :event, :private_message do |ctx, player, event|
+  friend = World.world.get_player(event.username)
+  friend.send(ForwardPrivateMessageEvent.new(player.username, player.privilege_level, event.compressed_message)) if interaction_permitted(player, friend)
+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

data/plugins/chat/private-messaging/plugin.xml

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+<?xml version="1.0"?>
+<plugin>
+  <id>private-messaging</id>
+  <version>1</version>
+  <name>Private Messaging</name>
+  <description>Adds friend and ignore list support, and private messaging.</description>
+  <authors>
+    <author>Major</author>
+  </authors>
+  <scripts>
+    <script>friend.rb</script>
+    <script>ignore.rb</script>
+    <script>messaging.rb</script>
+  </scripts>
+  <dependencies />
+</plugin>