From bd5ae0d64287b2d61cc3247d4d61f1d416b9f3ed Mon Sep 17 00:00:00 2001
From: Akamaru <akamaru92@live.de>
Date: Thu, 28 May 2015 16:47:30 +0200
Subject: [PATCH] big update

too much changed ._.
---
 bot/bot.lua                |  63 ++++++++---
 bot/utils.lua              |  35 +++---
 etc/telegram.conf          |   2 +-
 launch.sh                  |  44 ++++++--
 libs/redis.lua             |  47 ++++++++
 plugins/9gag.lua           |   1 -
 plugins/boobs.lua          |   2 +-
 plugins/channels.lua       |   2 +-
 plugins/cowsay.lua         |  14 +++
 plugins/danbooru2.lua      |  51 +++++----
 plugins/echo.lua           |   9 +-
 plugins/get.lua            |  91 +++++----------
 plugins/giphy.lua          |  23 +---
 plugins/google.lua         |   8 +-
 plugins/invite.lua         |  50 +++++----
 plugins/media_download.lua |   2 +-
 plugins/plugins.lua        |   4 +-
 plugins/sakurasou.lua      |   2 +-
 plugins/sh.lua             |   7 --
 plugins/stats.lua          | 224 ++++++++++++++++++++++---------------
 plugins/youtube_dl.lua     |   7 --
 21 files changed, 409 insertions(+), 279 deletions(-)
 create mode 100644 libs/redis.lua
 create mode 100644 plugins/cowsay.lua

diff --git a/bot/bot.lua b/bot/bot.lua
index 7bf700a..fa79f11 100644
--- a/bot/bot.lua
+++ b/bot/bot.lua
@@ -1,3 +1,7 @@
+package.path = package.path .. ';.luarocks/share/lua/5.2/?.lua'		
+  ..';.luarocks/share/lua/5.2/?/init.lua'		
+package.cpath = package.cpath .. ';.luarocks/lib/lua/5.2/?.so'		
+
 require("./bot/utils")
 
 VERSION = '2.5-reloaded'
@@ -12,10 +16,13 @@ function on_msg_receive (msg)
   local receiver = get_receiver(msg)
   
   -- vardump(msg)
+  msg = pre_process_service_msg(msg)
   if msg_valid(msg) then
     msg = pre_process_msg(msg)
-    match_plugins(msg)
-    --mark_read(receiver, ok_cb, false)
+    if msg then
+      match_plugins(msg)
+      --mark_read(receiver, ok_cb, false)
+    end
   end
 end
 
@@ -25,7 +32,7 @@ end
 function on_binlog_replay_end()
   started = true
   postpone (cron_plugins, false, 60*5.0)
-  -- See plugins/ping.lua as an example for cron
+  -- See plugins/isup.lua as an example for cron
 
   _config = load_config()
   cred_data = load_cred()
@@ -36,7 +43,7 @@ function on_binlog_replay_end()
 end
 
 function msg_valid(msg)
-  -- Dont process outgoing messages
+  -- Don't process outgoing messages
   if msg.out then
     print('\27[36mNicht gültig: Nachricht von mir\27[39m')
     return false
@@ -53,11 +60,6 @@ function msg_valid(msg)
     return false
   end
 
-  if msg.service then
-    print('\27[36mNicht gültig: Service\27[39m')
-    return false
-  end
-
   if not msg.to.id then
     print('\27[36mNicht gültig: To id not provided\27[39m')
     return false
@@ -68,13 +70,48 @@ function msg_valid(msg)
     return false
   end
 
+  if msg.from.id == our_id then
+    print('\27[36mNicht gültig: Nachricht von unserer ID\27[39m')
+    return false
+  end
+
+  if msg.to.type == 'encr_chat' then
+    print('\27[36mNicht gültig: Encrypted Chat\27[39m')
+    return false
+  end
+
+  if msg.from.id == 777000 then
+    print('\27[36mNicht gültig: Telegram Nachricht\27[39m')
+    return false
+  end
+
   return true
 end
 
+--
+function pre_process_service_msg(msg)
+   if msg.service then
+      local action = msg.action or {type=""}
+      -- Double / to discriminate of normal actions
+      msg.text = "//tgservice " .. action.type
+      msg.realservice = true
+
+      -- wipe the data to allow the bot to read service messages
+      if msg.out then
+         msg.out = false
+      end
+      if msg.from.id == our_id then
+         msg.from.id = 0
+      end
+   end
+   return msg
+end
+
+
 -- Apply plugin.pre_process function
 function pre_process_msg(msg)
   for name,plugin in pairs(plugins) do
-    if plugin.pre_process then
+    if plugin.pre_process and msg then
       msg = plugin.pre_process(msg)
     end
   end
@@ -110,7 +147,7 @@ end
 function match_plugin(plugin, plugin_name, msg)
   local receiver = get_receiver(msg)
 
-  -- Go over patterns. If one matches is enough.
+  -- Go over patterns. If one matches it's enough.
   for k, pattern in pairs(plugin.patterns) do
     local matches = match_pattern(pattern, msg.text)
     if matches then
@@ -154,7 +191,7 @@ function save_config( )
 end
 
 -- Returns the config from config.lua file.
--- If file doesnt exists, create it.
+-- If file doesn't exist, create it.
 function load_config( )
   local f = io.open('./data/config.lua', "r")
   -- If config.lua doesnt exists
@@ -186,7 +223,7 @@ end
 
 -- Create a basic config.json file and saves it.
 function create_config( )
-  -- A simple config with basic plugins and ourserves as priviled user
+  -- A simple config with basic plugins and ourselves as privileged user
   config = {
     enabled_plugins = {
       "help",
diff --git a/bot/utils.lua b/bot/utils.lua
index 16eec86..7e24a73 100644
--- a/bot/utils.lua
+++ b/bot/utils.lua
@@ -5,6 +5,7 @@ URL = require "socket.url"
 json = (loadfile "./libs/JSON.lua")()
 serpent = (loadfile "./libs/serpent.lua")()
 mimetype = (loadfile "./libs/mimetype.lua")()
+redis = (loadfile "./libs/redis.lua")()
 
 http.TIMEOUT = 10
 
@@ -55,9 +56,9 @@ function string:trim()
 end
 
 function get_http_file_name(url, headers)
-  -- Eg: fooo.var
+  -- Eg: foo.var
   local file_name = url:match("[^%w]+([%.%w]+)$")
-  -- Any delimited aphanumeric on the url
+  -- Any delimited alphanumeric on the url
   file_name = file_name or url:match("[^%w]+(%w+)[^%w]+$")
   -- Random name, hope content-type works
   file_name = file_name or str:random(5)
@@ -105,7 +106,7 @@ function download_to_file(url, file_name)
 
   file_name = file_name or get_http_file_name(url, headers)
     
-  local file_path = "/home/pi/Mikubot/tmp/"..file_name
+  local file_path = "tmp/"..file_name
   print("Gespeichert in: "..file_path)
 
   file = io.open(file_path, "w+")
@@ -138,7 +139,7 @@ function run_command(str)
   return result
 end
 
--- User has priviledges
+-- User has privileges
 function is_sudo(msg)
   local var = false
   -- Check users id in config 
@@ -210,12 +211,12 @@ function serialize_to_file(data, file, uglify)
   file:close()
 end
 
--- Retruns true if the string is empty
+-- Returns true if the string is empty
 function string:isempty()
   return self == nil or self == ''
 end
 
--- Retruns true if the string is blank
+-- Returns true if the string is blank
 function string:isblank()
   self = self:trim()
   return self:isempty()
@@ -276,7 +277,7 @@ function send_photo_from_url_callback(cb_extra, success, result)
   end
 end
 
---  Send multimple images asynchronous.
+--  Send multiple images asynchronous.
 -- param urls must be a table.
 function send_photos_from_url(receiver, urls)
   local cb_extra = {
@@ -288,7 +289,7 @@ function send_photos_from_url(receiver, urls)
 end
 
 -- Use send_photos_from_url. 
--- This fuction might be difficult to understand.
+-- This function might be difficult to understand.
 function send_photos_from_url_callback(cb_extra, success, result)
   -- cb_extra is a table containing receiver, urls and remove_path
   local receiver = cb_extra.receiver
@@ -330,7 +331,7 @@ function rmtmp_cb(cb_extra, success, result)
     os.remove(file_path)
     print(file_path.." gelöscht!")
   end
-  -- Finaly call the callback
+  -- Finally call the callback
   cb_function(cb_extra, success, result)
 end
 
@@ -394,7 +395,7 @@ function user_allowed(plugin, msg)
   return true
 end
 
--- Same as send_large_msg_callback but frienly params
+-- Same as send_large_msg_callback but friendly params
 function send_large_msg(destination, text)
   local cb_extra = {
     destination = destination,
@@ -450,16 +451,24 @@ function sleep(n)
 end
 
 -- Function to read data from files
-function load_from_file(file)
+function load_from_file(file, default_data)
   local f = io.open(file, "r+")
   -- If file doesn't exists
   if f == nil then
     -- Create a new empty table
-    serialize_to_file({}, file)
+	default_data = default_data or {}
+    serialize_to_file(default_data, file)
     print ('Erstelle Datei', file)
   else
     print ('Daten geladen von', file)
     f:close() 
   end
   return loadfile (file)()
-  end
\ No newline at end of file
+  end
+  
+  function run_bash(str)
+    local cmd = io.popen(str)
+    local result = cmd:read('*all')
+    cmd:close()
+    return result
+end
\ No newline at end of file
diff --git a/etc/telegram.conf b/etc/telegram.conf
index bdb4279..4619945 100644
--- a/etc/telegram.conf
+++ b/etc/telegram.conf
@@ -7,4 +7,4 @@ start on runlevel [2345]
 stop on shutdown
 
 setuid yourusername
-exec /bin/sh telegrambotpath/launch.sh
+exec /bin/sh telegrambotpath/launch.sh
\ No newline at end of file
diff --git a/launch.sh b/launch.sh
index cc71e51..d722c6f 100755
--- a/launch.sh
+++ b/launch.sh
@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 
 THIS_DIR=$(cd $(dirname $0); pwd)
+RAM=`grep MemTotal /proc/meminfo | awk '{print $2}'`
 cd $THIS_DIR
 
 update() {
@@ -14,20 +15,20 @@ install_luarocks() {
   git clone https://github.com/keplerproject/luarocks.git
   cd luarocks
   git checkout tags/v2.2.1 # Current stable
-   
+
   PREFIX="$THIS_DIR/.luarocks"
-  
+
   ./configure --prefix=$PREFIX --sysconfdir=$PREFIX/luarocks --force-config
-  
+
   RET=$?; if [ $RET -ne 0 ];
-    then echo "Error. Exiting."; exit $RET; 
+    then echo "Error. Exiting."; exit $RET;
   fi
 
   make build && make install
   RET=$?; if [ $RET -ne 0 ];
     then echo "Error. Exiting.";exit $RET;
   fi
-   
+
   cd ..
   rm -rf luarocks
 }
@@ -42,12 +43,37 @@ install_rocks() {
   RET=$?; if [ $RET -ne 0 ];
     then echo "Error. Exiting."; exit $RET;
   fi
+
+  ./.luarocks/bin/luarocks install redis-lua
+  RET=$?; if [ $RET -ne 0 ];
+    then echo "Error. Exiting."; exit $RET;
+  fi
+
+  ./.luarocks/bin/luarocks install lua-cjson
+  RET=$?; if [ $RET -ne 0 ];
+    then echo "Error. Exiting."; exit $RET;
+  fi
+
+  ./.luarocks/bin/luarocks install fakeredis
+  RET=$?; if [ $RET -ne 0 ];
+    then echo "Error. Exiting."; exit $RET;
+  fi
+
+  ./.luarocks/bin/luarocks install xml
+  RET=$?; if [ $RET -ne 0 ];
+    then echo "Error. Exiting."; exit $RET;
+  fi
 }
 
 install() {
   git pull
   git submodule update --init --recursive
-  cd tg && ./configure && make
+  # If RAM is lower than 300MB disable extf queries
+  if [ $RAM -lt 307200 ]; then
+      cd tg && ./configure --disable-extf && make
+  else
+      cd tg && ./configure && make
+  fi
   RET=$?; if [ $RET -ne 0 ];
     then echo "Error. Exiting."; exit $RET;
   fi
@@ -73,7 +99,5 @@ else
     exit 1
   fi
 
-  LUA_PATH=";;.luarocks/share/lua/5.2/?.lua;.luarocks/share/lua/5.2/?/init.lua" \
-    LUA_CPATH=";;.luarocks/lib/lua/5.2/?.so" \
-    ./tg/bin/telegram-cli -k ./tg/tg-server.pub -s ./bot/bot.lua -l 1
-fi
+  ./tg/bin/telegram-cli -k ./tg/tg-server.pub -s ./bot/bot.lua -l 1 -E
+fi
\ No newline at end of file
diff --git a/libs/redis.lua b/libs/redis.lua
new file mode 100644
index 0000000..c09142b
--- /dev/null
+++ b/libs/redis.lua
@@ -0,0 +1,47 @@
+local Redis = require 'redis'
+local FakeRedis = require 'fakeredis'
+
+local params = {
+  host = '127.0.0.1',
+  port = 6379,
+}
+
+-- Overwrite HGETALL
+Redis.commands.hgetall = Redis.command('hgetall', {
+  response = function(reply, command, ...)
+    local new_reply = { }
+    for i = 1, #reply, 2 do new_reply[reply[i]] = reply[i + 1] end
+    return new_reply
+  end
+})
+
+local redis = nil
+
+-- Won't launch an error if fails
+local ok = pcall(function()
+  redis = Redis.connect(params)
+end)
+
+if not ok then
+
+  local fake_func = function()
+    print('\27[31mCan\'t connect with Redis, install/configure it!\27[39m')
+  end
+  fake_func()
+  fake = FakeRedis.new()
+
+  print('\27[31mRedis addr: '..params.host..'\27[39m')
+  print('\27[31mRedis port: '..params.port..'\27[39m')
+
+  redis = setmetatable({fakeredis=true}, {
+  __index = function(a, b)
+    if b ~= 'data' and fake[b] then
+      fake_func(b)
+    end
+    return fake[b] or fake_func
+  end })
+
+end
+
+
+return redis
\ No newline at end of file
diff --git a/plugins/9gag.lua b/plugins/9gag.lua
index 3427604..b354fa0 100644
--- a/plugins/9gag.lua
+++ b/plugins/9gag.lua
@@ -24,7 +24,6 @@ end
 local function run(msg, matches)
   local receiver = get_receiver(msg)
   local url, title = get_9GAG()
-  local file_path = download_to_file(url)
   send_photo_from_url(receiver, url, send_title, {receiver, title})
   return false
 end
diff --git a/plugins/boobs.lua b/plugins/boobs.lua
index e92101f..7092822 100644
--- a/plugins/boobs.lua
+++ b/plugins/boobs.lua
@@ -11,7 +11,7 @@ local function getRandomButts(attempt)
   local data = json:decode(res)[1]
 
   -- The OpenBoobs API sometimes returns an empty array
-  if not data and attempt < 3 then 
+  if not data and attempt <= 3 then 
     print('Keine Butts gefunden!')
     return getRandomButts(attempt)
   end
diff --git a/plugins/channels.lua b/plugins/channels.lua
index a22603c..a4ce5fd 100644
--- a/plugins/channels.lua
+++ b/plugins/channels.lua
@@ -40,7 +40,7 @@ end
 local function pre_process(msg)
 	local receiver = get_receiver(msg)
 	
-	-- If is sudo can reeanble the channel
+	-- If sender is sudo then re-enable the channel
 	if is_sudo(msg) then
 	  if msg.text == "/channel enable" then
 	    enable_channel(receiver)
diff --git a/plugins/cowsay.lua b/plugins/cowsay.lua
new file mode 100644
index 0000000..904efca
--- /dev/null
+++ b/plugins/cowsay.lua
@@ -0,0 +1,14 @@
+function run(msg, matches)
+  cow = matches[1]
+  local receiver = get_receiver(msg)
+  local text = run_bash('cowsay "' .. cow .. '"')
+    send_msg(receiver, text, ok_cb, false)
+end
+
+return {
+    description = "", 
+    usage = {""},
+    patterns = {"^/cowsay (.*)$"}, 
+    run = run
+}
+--by Akamaru [https://ponywave.de]
\ No newline at end of file
diff --git a/plugins/danbooru2.lua b/plugins/danbooru2.lua
index 51af768..dac3adc 100644
--- a/plugins/danbooru2.lua
+++ b/plugins/danbooru2.lua
@@ -7,19 +7,15 @@ local scale_day = "?scale=day"
 local scale_week = "?scale=week"
 local scale_month = "?scale=month"
 
-function get_post(url)
+local function get_post(url)
   local b, c, h = http.request(url)
+  if c ~= 200 then return nil end
   local posts = json:decode(b)
 
-  -- bad random - bad magic...
-  math.randomseed( os.time() )
-  math.random(#posts)
-  math.random(#posts)
-
   return posts[math.random(#posts)]
 end
 
-function run(msg, matches)
+local function run(msg, matches)
 
   local url = URL
 
@@ -28,39 +24,48 @@ function run(msg, matches)
   else
     url = url .. URL_POP
 
-        if matches[1] == "/dand" then
+        if matches[1] == "d" then
           url = url .. scale_day
-    elseif matches[1] == "/danw" then
+    elseif matches[1] == "w" then
           url = url .. scale_week
-    elseif matches[1] == "/danm" then
+    elseif matches[1] == "m" then
           url = url .. scale_month
     end
   end
 
   local post = get_post(url)
 
-  local receiver = get_receiver(msg)
-  local img = URL .. post.large_file_url
-  send_photo_from_url(receiver, img)
+  if post then
+    vardump(post)
+    local img = URL .. post.large_file_url
+    send_photo_from_url(get_receiver(msg), img)
 
-  local txt = 'Artist: ' .. post.tag_string_artist .. '\n'
-  txt = txt .. 'Character: ' .. post.tag_string_character .. '\n'
-  --txt = txt .. '[' .. math.ceil(post.file_size/1000) .. 'kb] ' .. URL .. post.file_url
-  return txt
+    local txt = ''
+    if post.tag_string_artist ~= '' then
+      txt = 'Artist: ' .. post.tag_string_artist .. '\n'
+    end
+    if post.tag_string_character ~= '' then
+      txt = txt .. 'Character: ' .. post.tag_string_character .. '\n'
+    end
+    if post.file_size ~= '' then
+      txt = txt .. '[' .. math.ceil(post.file_size/1000) .. 'kb] ' .. URL .. post.file_url
+    end
+    return txt
+  end
 end
 
 return {
   description = "Gets a random fresh or popular image from Danbooru", 
   usage = {
     "/dan - gets a random fresh image from Danbooru 🔞",
-    "/dand - random daily popular image 🔞",
-    "/danw - random weekly popular image 🔞",
-    "/danm - random monthly popular image 🔞"},
+    "/dan d - random daily popular image 🔞",
+    "/dan w - random weekly popular image 🔞",
+    "/dan m - random monthly popular image 🔞"},
   patterns = {
       "^/dan$",
-      "^/dand$",
-      "^/danw$",
-      "^/danm$"}, 
+      "^/dan ?(d)$",
+      "^/dan ?(w)$",
+      "^/dan ?(m)$"}, 
   run = run 
 }
 
diff --git a/plugins/echo.lua b/plugins/echo.lua
index ea1e347..323cd5b 100644
--- a/plugins/echo.lua
+++ b/plugins/echo.lua
@@ -1,5 +1,12 @@
 local function run(msg, matches)
-  return matches[1]
+  local text = matches[1]
+  local b = 1
+
+  while b ~= 0 do
+    text,b = text:gsub('^/+','')
+    text = text:trim()
+  end
+  return text
 end
 
 return {
diff --git a/plugins/get.lua b/plugins/get.lua
index db306cc..cba79a2 100644
--- a/plugins/get.lua
+++ b/plugins/get.lua
@@ -1,78 +1,49 @@
-local _file_values = './data/values.lua'
-
-_values = load_from_file(_file_values)
-
-local function fetch_value(chat, value_name)
-  -- Chat non exists
-  if _values[chat] == nil then
-    return nil
+local function get_variables_hash(msg)
+  if msg.to.type == 'chat' then
+    return 'chat:'..msg.to.id..':variables'
   end
-
-  if value_name == nil then
-    return nil
-  end 
-
-  local value = _values[chat][value_name]
-  return value
-end
-
-local function get_value(chat, value_name)
-
-  -- If chat values is empty
-  if (_values[chat] == nil) then
-    return "Hier sind keine Daten"
+  if msg.to.type == 'user' then
+    return 'user:'..msg.from.id..':variables'
   end
+end 
 
-  -- If there is not value name, return all the values.
-  if (value_name == nil ) then
-    local text = ""
-    for key,value in pairs(_values[chat]) do
-      text = text..key.." = "..value.."\n"
+local function list_variables(msg)
+  local hash = get_variables_hash(msg)
+  
+  if hash then
+    local names = redis:hkeys(hash)
+    local text = ''
+    for i=1, #names do
+      text = text..names[i]..'\n'
     end
     return text
-  end 
-  local value = _values[chat][value_name]
-  if ( value == nil) then
-    return 'Konnte "'..value_name..' nicht finden'
   end
-  return value_name.." = "..value
+end
+
+local function get_value(msg, var_name)
+  local hash = get_variables_hash(msg)
+  if hash then
+    local value = redis:hget(hash, var_name)
+    if not value then
+      return'Not found, use "/get" to list variables'
+    else
+      return var_name..' => '..value
+    end
+  end
 end
 
 local function run(msg, matches)
-  local chat_id = tostring(msg.to.id)
-  if matches[1] == "/get" then
-    return get_value(chat_id, nil)
+  if matches[2] then
+    return get_value(msg, matches[2])
+  else
+    return list_variables(msg)
   end
-  return get_value(chat_id, matches[1])
-end
-
-local function lex(msg)
-
-  if msg.text then
-    local text = msg.text
-    local chat_id = tostring(msg.to.id)
-    local s, e = text:find("%$%a+")
-
-    if s then
-      local var = text:sub(s + 1, e)
-      local value = fetch_value(chat_id, var)
-      
-      if (value == nil) then
-        value = "(Unbekannter Wert " .. var .. ")"
-      end
-
-      msg.text = text:sub(0, s - 1) .. value .. text:sub(e + 1)
-    end
-  end
-
-  return msg
 end
 
 return {
     description = "Bekommt Variable, die mit /set gesetzt wurde", 
     usage = {"/get (Variable)"},
-    patterns = {"^/get (%a+)$","^/get$"}, 
-    patterns = {"^/get (%a+)$","^/get$"}, 
+    patterns = {"^/get (%a+)$","^/get$"},
     run = run,
     pre_process = lex
 }
diff --git a/plugins/giphy.lua b/plugins/giphy.lua
index c780d4c..c0ed7a2 100644
--- a/plugins/giphy.lua
+++ b/plugins/giphy.lua
@@ -38,34 +38,23 @@ local function search(text)
   return get_image(response)
 end
 
-local function send_gif(cb_extra, success, result)
-  local receiver = cb_extra.receiver
-  local gif_url = cb_extra.gif_url
-  send_document_from_url(receiver, gif_url)
-end
-
 local function run(msg, matches)
   local gif_url = nil
-  
-  -- If no search data, a random trending GIF will be sended
+
+  -- If no search data, a random trending GIF will be sent
   if matches[1] == "/gif" or matches[1] == "/giphy" then
     gif_url = get_random_top()
   else
     gif_url = search(matches[1])
   end
 
-  if not gif_url then 
-    return "Kein GIF gefunden!"
+  if not gif_url then
+   return 'Keine GIF gefunden!'
   end
 
   local receiver = get_receiver(msg)
-  print("GIF URL"..gif_url)
-  local text = 'Einen Moment, GIF wird hochgeladen.'
-  local cb_extra = {
-    gif_url = gif_url,
-    receiver = receiver
-  }
-  send_msg(receiver, text, send_gif, cb_extra)
+  print("GIF URL: "..gif_url)
+  send_document_from_url(receiver, gif_url)
 end
 
 return {
diff --git a/plugins/google.lua b/plugins/google.lua
index 89f103c..70c1092 100644
--- a/plugins/google.lua
+++ b/plugins/google.lua
@@ -1,4 +1,4 @@
-function googlethat(query)
+local function googlethat(query)
   local api        = "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&safe=active&hl=de&"
   local parameters = "q=".. (URL.escape(query) or "")
 
@@ -7,7 +7,7 @@ function googlethat(query)
   if code ~=200 then return nil  end
   local data = json:decode(res)
   
-  local results={}
+  local results = {}
   for key,result in ipairs(data.responseData.results) do
     table.insert(results, {
 	  result.titleNoFormatting,
@@ -17,7 +17,7 @@ function googlethat(query)
   return results
 end
 
-function stringlinks(results)
+local function stringlinks(results)
   local stringresults=""
   for key,val in ipairs(results) do
     stringresults=stringresults..val[1].." - "..val[2].."\n"
@@ -25,7 +25,7 @@ function stringlinks(results)
   return stringresults
 end
 
-function run(msg, matches)
+local function run(msg, matches)
    local results = googlethat(matches[1])
    return stringlinks(results)
 end
diff --git a/plugins/invite.lua b/plugins/invite.lua
index c3e29e6..1057d3c 100644
--- a/plugins/invite.lua
+++ b/plugins/invite.lua
@@ -1,32 +1,36 @@
 -- Invite other user to the chat group.
--- Use /invite name User_name or /invite id id_number
+-- Use !invite name User_name or !invite id id_number
 -- The User_name is the print_name (there are no spaces but _)
 
 do
 
+local function callback(extra, success, result)
+  vardump(success)
+  vardump(result)
+end
+
 local function run(msg, matches)
-	-- User submitted a user name
-	if matches[1] == "name" then
-		user = matches[2]
-		user = string.gsub(user," ","_")
-	end
-	-- User submitted an id
-	if matches[1] == "id" then
-		user = matches[2]
-		user = 'user#id'..user
-	end
-	-- The message must come from a chat group
-	if msg.to.type == 'chat' then
-    	chat = 'chat#id'..msg.to.id
-  	else 
-  		return 'Dies ist keine Gruppe!!'
-  	end
-  	print ("Füge "..user.." zu "..chat.." hinzu")
-	status = chat_add_user (chat, user, ok_cb, false)
-	if not status then
-		return "Ein Fehler ist aufgetreten"
-	end
-	return "User "..user.." zu "..chat.." hinzugefügt!"
+  local user = matches[2]
+
+  -- User submitted a user name
+  if matches[1] == "name" then
+    user = string.gsub(user," ","_")
+  end
+  
+  -- User submitted an id
+  if matches[1] == "id" then
+    user = 'user#id'..user
+  end
+
+  -- The message must come from a chat group
+  if msg.to.type == 'chat' then
+    local chat = 'chat#id'..msg.to.id
+    chat_add_user(chat, user, callback, false)
+    return "User "..user.." zu "..chat.." hinzugefügt!"
+  else 
+    return 'Dies ist keine Gruppe!!'
+  end
+
 end
 
 return {
diff --git a/plugins/media_download.lua b/plugins/media_download.lua
index 2f2080c..1425480 100644
--- a/plugins/media_download.lua
+++ b/plugins/media_download.lua
@@ -9,7 +9,7 @@ end
 
 local function run(msg, matches)
   if msg.media then
-    if msg.media.type == 'document' then
+	if msg.media.type == 'document' then
       load_document(msg.id, callback, msg.id)
     end
     if msg.media.type == 'photo' then
diff --git a/plugins/plugins.lua b/plugins/plugins.lua
index 9b6e9fa..ec8318a 100644
--- a/plugins/plugins.lua
+++ b/plugins/plugins.lua
@@ -1,6 +1,6 @@
 do
 
--- Retruns the key (index) in the config.enabled_plugins table
+-- Returns the key (index) in the config.enabled_plugins table
 local function plugin_enabled( name )
   for k,v in pairs(_config.enabled_plugins) do
     if name == v then
@@ -126,7 +126,7 @@ local function run(msg, matches)
     return list_plugins()
   end
 
-  -- Reenable a plugin for this chat
+  -- Re-enable a plugin for this chat
   if matches[1] == 'enable' and matches[3] == 'chat' then
     local receiver = get_receiver(msg)
     local plugin = matches[2]
diff --git a/plugins/sakurasou.lua b/plugins/sakurasou.lua
index 4d4ad56..1efe7a7 100644
--- a/plugins/sakurasou.lua
+++ b/plugins/sakurasou.lua
@@ -32,7 +32,7 @@ end
 return {
   description = "Sendet euch ein Charakter aus Sakurasou no Pet na Kanojo", 
   usage = {"/shiina","/Shiina","/chihiro","/Chihiro","/jin","/Jin","/misaki","/Misaki","/nanami","/Nanami","/ryuunosuke","/Ryuunosuke","/sorata","/Sorata"},
-  patterns = {"^/shiina$","^/Shiina$","^/chihiro$","^/Chihiro"$,"^/jin$","^/Jin$","^/misaki$","^/Misaki$","^/nanami$","^/Nanami$","^/ryuunosuke$","^/Ryuunosuke$","^/sorata$","^/Sorata$"}, 
+  patterns = {"^/shiina$","^/Shiina$","^/chihiro$","^/Chihiro$","^/jin$","^/Jin$","^/misaki$","^/Misaki$","^/nanami$","^/Nanami$","^/ryuunosuke$","^/Ryuunosuke$","^/sorata$","^/Sorata$"}, 
   run = run 
 }
 --by Akamaru [https://ponywave.de]
\ No newline at end of file
diff --git a/plugins/sh.lua b/plugins/sh.lua
index 68a5fc9..da6933d 100644
--- a/plugins/sh.lua
+++ b/plugins/sh.lua
@@ -6,13 +6,6 @@ function run_sh(msg)
      return text
 end
 
-function run_bash(str)
-    local cmd = io.popen(str)
-    local result = cmd:read('*all')
-    cmd:close()
-    return result
-end
-
 function run(msg, matches)
   local receiver = get_receiver(msg)
   if string.starts(msg.text, '/sh') then
diff --git a/plugins/stats.lua b/plugins/stats.lua
index 20cb8a7..a7129b7 100644
--- a/plugins/stats.lua
+++ b/plugins/stats.lua
@@ -1,115 +1,153 @@
 -- Saves the number of messages from a user
--- Can check the number of messages with !stats 
+-- Can check the number of messages with /stats 
 
 do
 
-local socket = require('socket') 
-local _file_stats = './data/stats.lua'
-local _stats
+local NUM_MSG_MAX = 500
+local TIME_CHECK = 4 -- seconds
 
-function update_user_stats(msg)
-  -- Save user to stats table
-  local from_id = tostring(msg.from.id)
-  local to_id = tostring(msg.to.id)
-  local user_name = get_name(msg)
-  print ('Neue Nachricht von '..user_name..'['..from_id..']'..' in '..to_id)
-  -- If last name is nil dont save last_name.
-  local user_last_name = msg.from.last_name
-  local user_print_name = msg.from.print_name
-  if _stats[to_id] == nil then
-    print ('Neuer stats key to_id: '..to_id)
-    _stats[to_id] = {}
-  end
-  if _stats[to_id][from_id] == nil then
-    print ('Neuer stats key from_id: '..to_id)
-    _stats[to_id][from_id] = {
-      user_id = from_id,
-      name = user_name,
-      last_name = user_last_name,
-      print_name = user_print_name,
-      msg_num = 1
-    }
-  else
-    print ('Updated '..to_id..' '..from_id)
-    local actual_num = _stats[to_id][from_id].msg_num
-    _stats[to_id][from_id].msg_num = actual_num + 1
-    _stats[to_id][from_id].user_id = from_id
-    _stats[to_id][from_id].last_name = user_last_name
-  end
-end
-
-function read_file_stats( )
-  local f = io.open(_file_stats, "r+")
-  -- If file doesn't exists
-  if f == nil then
-    -- Create a new empty table
-    print ('"user stats file" erstellt '.._file_stats)
-    serialize_to_file({}, _file_stats)
-  else
-    print ('Stats geladen: '.._file_stats)
-    f:close() 
-  end
-  return loadfile (_file_stats)()
-end
-
-
-local function save_stats()
-  -- Save stats to file
-  serialize_to_file(_stats, _file_stats)
-end
-
-local function get_stats_status( msg )
-  -- vardump(stats)
-  local text = ""
-  local to_id = tostring(msg.to.id)
-  local rank = {}
-
-  for id, user in pairs(_stats[to_id]) do
-    table.insert(rank, user)
+local function user_print_name(user)
+  if user.print_name then
+    return user.print_name
   end
 
-  table.sort(rank, function(a, b) 
-      if a.msg_num and b.msg_num then
-        return a.msg_num > b.msg_num
-      end
-    end
-  )
-
-  for id, user in pairs(rank) do
-    -- Previous versions didn't save that
-    user_id = user.user_id or ''
-    print(">> ", id, user.name)
-    if user.last_name == nil then
-      text = text..user.name..": "..user.msg_num.."\n"
-    else
-	--text = text..user.name.." "..user.last_name..": "..user.msg_num.."\n"
-      text = text..user.name..": "..user.msg_num.."\n"
-    end
+  local text = ''
+  if user.first_name then
+    text = user.last_name..' '
   end
-  print("usuarios: "..text)
+  if user.lastname then
+    text = text..user.last_name
+  end
+
   return text
 end
 
-local function run(msg, matches)
-  if matches[1] == "stats" then
-    if msg.to.type == 'chat' or is_sudo(msg) then
-      return get_stats_status(msg)
-    else
-      return 'Stats funktioniert nur in Chats'
+-- Returns a table with `name` and `msgs`
+local function get_msgs_user_chat(user_id, chat_id)
+  local user_info = {}
+  local uhash = 'user:'..user_id
+  local user = redis:hgetall(uhash)
+  local um_hash = 'msgs:'..user_id..':'..chat_id
+  user_info.msgs = tonumber(redis:get(um_hash) or 0)
+  user_info.name = user_print_name(user)..' ('..user_id..')'
+  return user_info
+end
+
+local function get_msg_num_stats(msg)
+  if msg.to.type == 'chat' then
+    local chat_id = msg.to.id
+    -- Users on chat
+    local hash = 'chat:'..chat_id..':users'
+    local users = redis:smembers(hash)
+    local users_info = {}
+
+    -- Get user info
+    for i = 1, #users do
+      local user_id = users[i]
+      local user_info = get_msgs_user_chat(user_id, chat_id)
+      table.insert(users_info, user_info)
     end
-  else 
-    update_user_stats(msg)
+
+    -- Sort users by msgs number
+    table.sort(users_info, function(a, b) 
+        if a.msgs and b.msgs then
+          return a.msgs > b.msgs
+        end
+      end)
+
+    local text = ''
+    for k,user in pairs(users_info) do
+      text = text..user.name..' => '..user.msgs..'\n'
+    end
+
+    return text
   end
 end
 
-_stats = read_file_stats()
+-- Save stats, ban user
+local function pre_process(msg)
+  -- Save user on Redis
+  if msg.from.type == 'user' then
+    local hash = 'user:'..msg.from.id
+    if msg.from.print_name then
+      redis:hset(hash, 'print_name', msg.from.print_name)
+    end
+    if msg.from.first_name then
+      redis:hset(hash, 'first_name', msg.from.first_name)
+    end
+    if msg.from.last_name then
+      redis:hset(hash, 'last_name', msg.from.last_name)
+    end
+  end
+
+  -- Save stats on Redis
+  if msg.to.type == 'chat' then
+    -- User is on chat
+    local hash = 'chat:'..msg.to.id..':users'
+    redis:sadd(hash, msg.from.id)
+  end
+
+  -- Total user msgs
+  local hash = 'msgs:'..msg.from.id..':'..msg.to.id
+  redis:incr(hash)
+
+  -- Check flood
+  if msg.from.type == 'user' then
+    local hash = 'user:'..msg.from.id..':msgs'
+    local msgs = tonumber(redis:get(hash) or 0)
+    if msgs > NUM_MSG_MAX then
+      print('User '..msg.from.id..'is flooding '..msgs)
+      msg = nil
+    end
+    redis:setex(hash, TIME_CHECK, msgs+1)
+  end
+
+  return msg
+end
+
+local function get_bot_stats()
+
+  local redis_scan = [[
+    local cursor = '0'
+    local count = 0
+    repeat
+      local r = redis.call("SCAN", cursor, "MATCH", KEYS[1])
+      cursor = r[1]
+      count = count + #r[2]
+    until cursor == '0'
+    return count]]
+
+  -- Users
+  local hash = 'msgs:*:'..our_id
+  local r = redis:eval(redis_scan, 1, hash)
+  local text = 'Users: '..r
+
+  hash = 'chat:*:users'
+  r = redis:eval(redis_scan, 1, hash)
+  text = text..'\nChats: '..r
+
+  return text
+
+end
+
+local function run(msg, matches)
+  if matches[1]:lower() == "stats" then
+    if msg.to.type == 'chat' then
+      return get_msg_num_stats(msg)
+    elseif is_sudo(msg) then
+      return get_bot_stats()
+    else
+      return 'Stats works only on chats'
+    end
+  end
+end
 
 return {
   description = "Zeigt wieviel ihr spamt", 
   usage = {"/stats"},
-  patterns = {"^/(stats)",}, 
+  patterns = {"^/([Ss]tats)$"}, 
   run = run,
-  cron = save_stats
+  pre_process = pre_process
 }
 
-end
+end
\ No newline at end of file
diff --git a/plugins/youtube_dl.lua b/plugins/youtube_dl.lua
index f027f41..aead337 100644
--- a/plugins/youtube_dl.lua
+++ b/plugins/youtube_dl.lua
@@ -1,10 +1,3 @@
-function run_bash(str)
-    local cmd = io.popen(str)
-    local result = cmd:read('*all')
-    cmd:close()
-    return result
-end
-
 function run(msg, matches)
   URL = matches[1]
   local receiver = get_receiver(msg)