beerchat.on_channel_message = function(channel, playername, message)

hash.lua

@@ -6,6 +6,8 @@ local channel_message_string = "|#${channel_name}| <${from_player}> ${message}"
 hashchat_lastrecv = {}
 
 local hash_send_all = function(msg, name, channel_name)
+	beerchat.on_channel_message(channel_name, name, msg)
+
 	for _,player in ipairs(minetest.get_connected_players()) do
 		local target = player:get_player_name()
 		-- Checking if the target is in this channel

hooks.lua

@@ -0,0 +1,4 @@
+
+-- called on every channel message
+beerchat.on_channel_message = function(channel, playername, message)
+end

init.lua

@@ -29,6 +29,7 @@ beerchat = {
 
 local MP = minetest.get_modpath("beerchat")
 dofile(MP.."/format_message.lua")
+dofile(MP.."/hooks.lua")
 dofile(MP.."/storage.lua")
 dofile(MP.."/session.lua")
 dofile(MP.."/pm.lua")

message.lua

@@ -43,6 +43,8 @@ minetest.register_on_chat_message(function(name, message)
 	elseif beerchat.playersChannels[name] and not beerchat.playersChannels[name][channel_name] then
 		minetest.chat_send_player(name, "You need to join this channel in order to be able to send messages to it")
 	else
+		beerchat.on_channel_message(channel_name, name, message)
+
 		for _,player in ipairs(minetest.get_connected_players()) do
 			local target = player:get_player_name()
 			-- Checking if the target is in this channel