bot-bridge-nicks.lua -- HexChat plug-in to wrap IRC bots to real user nicknames

bot-bridge-nicks.lua

hexchat.register("bot-bridge-nicks", "0.1", "Rewrites messages of bots to display bridge users as IRC users")

-- ijchain, ischain, liberachain are bridges:
botspattern = {"i.*chain", "^[<«](.-)[>»] (.*)$", "^<?(.-)>? (.*)$"}
botspattern2 = {"l.*chain", "^[<«](.-)[>»] (.*)$", "^%* (.-) (.*)$"}

local function fullname(user, nick)
  return user:gsub("%s+", "-").."!"..user:gsub("%s+", "_").."@behind.the.bridge/"..nick
end

local function on_message(args)
  local nick = args[1]
  local msg = args[2]
  local chan = hexchat.get_info("channel")
  -- matches bridges pattern:
  if string.match(nick, botspattern[1]) then
    -- check and wrap "<user> message" from bridge user message:
    v = {string.match(msg, botspattern[2])}
    if #v ~= 0 then
      msg = v[2]
      local pnick = nick
      nick = v[1]
      -- second match (triple bridge?):
      if string.match(nick, botspattern2[1]) then
        -- check and wrap "<user> message" from bridge user message:
        v = {string.match(msg, botspattern2[2])}
        if #v ~= 0 then
          msg = v[2]
          pnick = nick
          nick = v[1]
        end
      end
      nick = fullname(nick, pnick)
      hexchat.command("RECV :"..nick.." PRIVMSG "..chan.." -"..msg)
      return hexchat.EAT_ALL -- drop original message
    end
  end
  return hexchat.EAT_NONE -- bypass (do nothing)
end

local function on_action(args)
  local nick = args[1]
  local msg = args[2]
  local chan = hexchat.get_info("channel")
  -- matches bridges pattern:
  if string.match(nick, botspattern[1]) then
    -- check and wrap "has become available"/"has left" actions from bridge to JOIN/QUIT messages
    local v = {string.match(msg, botspattern[3])}
    if #v ~= 0 then
      msg = v[2]
      local pnick = nick
      nick = v[1]
      -- second match (triple bridge?):
      if string.match(nick, botspattern2[1]) then
        -- check and wrap "<user> message" from bridge user message:
        v = {string.match(msg, botspattern2[3])}
        if #v ~= 0 then
          msg = v[2]
          pnick = nick
          nick = v[1]
        end
      end
      nick = fullname(nick, pnick)
      if msg == "has left" then
        msg = "QUIT :"..msg
      elseif msg == "has become available" then
        msg = "JOIN "..chan
      else
        msg = "PRIVMSG "..chan.." :\x01ACTION "..msg.."\x01"
      end
      hexchat.command("RECV :"..nick.." "..msg)
      return hexchat.EAT_ALL -- drop original message
    end
  end
  return hexchat.EAT_NONE -- bypass (do nothing)
end

hexchat.hook_print("Channel Message",        on_message, hexchat.PRI_HIGHEST)
hexchat.hook_print("Channel Msg Hilight",    on_message, hexchat.PRI_HIGHEST)
hexchat.hook_print("Channel Action",         on_action, hexchat.PRI_HIGHEST)
hexchat.hook_print("Channel Action Hilight", on_action, hexchat.PRI_HIGHEST)

hexchat.print("Loaded bot-bridge-nicks script")

-- to test on load whether it works:
-- on_message({'ischain','<Tester Alex> -0.0, Test message'})
-- on_message({'ischain', '<liberachain> «tester» test'})
-- on_message({'ijchain', '<liberachain> <Tester> test message'})
-- on_action({'ijchain', 'Tester tests chat'})
-- on_action({'ijchain', '<liberachain> * Tester tests chat from libera side'})