welcome/bye on join/leave group

function to alter msg before checking against plugin triggers

README.md

@@ -6,6 +6,9 @@ Public bot runs on [@mokubot](http://telegram.me/mokubot).
 
 Requires lua-socket and lua-sec. [dkjson](https://github.com/LuaDist/dkjson/) is provided.
 
+Edit config.json with your bot API key, and other API keys if desirable.
+Plugins which require an API key are disabled by default.
+
 `lua bot.lua`
 
 ###Configuration

bot.lua

@@ -3,13 +3,15 @@
 
 HTTP = require('socket.http')
 HTTPS = require('ssl.https')
-JSON = require('dkjson')
 URL = require('socket.url')
+JSON = require('dkjson')
 
-VERSION = 2.2
+VERSION = 2.3
 
 function on_msg_receive(msg)
 
+	msg = process_msg(msg)
+
 	if msg.date < os.time() - 5 then return end -- don't react to old messages
 	if not msg.text then return end -- don't react to media messages
 	if msg.forward_from then return end -- don't react to forwarded messages
@@ -72,6 +74,22 @@ function bot_init()
 
 end
 
+function process_msg(msg)
+
+	if msg.new_chat_participant and msg.new_chat_participant.id ~= bot.id then
+		msg.text = 'hi '..bot.first_name
+		msg.from = msg.new_chat_participant
+	end
+
+	if msg.left_chat_participant and msg.left_chat_participant.id ~= bot.id then
+		msg.text = 'bye '..bot.first_name
+		msg.from = msg.left_chat_participant
+	end
+
+	return msg
+
+end
+
 bot_init()
 reminders = {}
 last_update = 0

plugins/chatter.lua

@@ -1,4 +1,4 @@
- -- shout-out to @luksi_reiku for showing me this site
+ -- shout-out to @luksireiku for showing me this site
 
 local PLUGIN = {}
 

plugins/personality.lua

@@ -32,6 +32,10 @@ function PLUGIN.action(msg) -- I WISH LUA HAD PROPER REGEX SUPPORT
 		return send_message(msg.chat.id, 'Hi, ' .. msg.from.first_name .. '!')
 	end
 
+	if input:match('bye,? '..bot.first_name) or input:match('later,? '..bot.first_name) then
+		return send_message(msg.chat.id, 'Bye-bye, ' .. msg.from.first_name .. '!')
+	end
+
 	if input:match('i hate you,? '..bot.first_name) or input:match('screw you,? '..bot.first_name) or input:match('fuck you,? '..bot.first_name) then
 		return send_msg(msg, '; _ ;')
 	end
@@ -40,6 +44,9 @@ function PLUGIN.action(msg) -- I WISH LUA HAD PROPER REGEX SUPPORT
 		return send_msg(msg, '<3')
 	end
 
+--	msg.text = '@' .. bot.username .. ', ' .. msg.text:gsub(bot.first_name, '')
+--	on_msg_receive(msg)
+
 end
 
 return PLUGIN