-- auto/manual user cleaner if user hasn't been in the hub for x weeks
-- cleans all levels but master level
-- made by plop
-- julian day function made by the guru tezlo
-- code stripped from artificial insanety bot

-- !noclean <user_name> add/remove  - adds/removes users from/to the list which aren't cleaned
-- !showusers - shows all registered users
-- !seen <user_name> - shows the last time the user left the hub
-- !shownoclean - shows all names wich are on the noclean list
-- !cleanusers - manualy start the usercleaner

-- a folder named userinfo is needed for this bot 2 work

--------------------------------------------------------------------- config
WEEKS = 4    -- every1 older then x weeks is deleted
Bot = "The_Cleaner"
AUTO = 1   -- use 1 for automode, 0 for manual

---------------------------------------------------------------------  the needed tables
UsersTable = {}
Seen = {}
NoClean = {}


--------------------------------------------------------------------- julian day function 2 calcute the time users spend in the hub
function jdate(d, m, y)
	local a, b, c = 0, 0, 0
	if m <= 2 then
		y = y - 1
		m = m + 12
	end
	if (y*10000 + m*100 + d) >= 15821015 then
		a = floor(y/100)
		b = 2 - a + floor(a/4)
	end
	if y <= 0 then c = 0.75 end
	return floor(365.25*y - c) + floor(30.6001*(m+1) + d + 1720994 + b)
end

--------------------------------------------------------------------- loading the last seen database
function LoadLastSeen()
   readfrom("userinfo/lastseen.lst")
   while 1 do
      local line = read()
      if line ==  nil then
         break
      end
      local s,e,name,date = strfind(line, "(.+)$(.+)")
      if name ~= nil then
         Seen[name]=date
      end
   end
   readfrom()
end

--------------------------------------------------------------------- saving last seen date
function SaveSeen()
   writeto("userinfo/lastseen.lst")
   for a,b in Seen do
      Seen[a]=b
      write(a.."$"..b.."\n")
   end
   writeto()
end

--------------------------------------------------------------------- call the garbage man
function Clear() 
   collectgarbage() 
   flush() 
end

--------------------------------------------------------------------- opening the registered users file from ptokax and inserting the users into the table
function OpenRegisterdUsersFile()
   readfrom("../RegisteredUsers.dat")
   UsersTable = nil
   Clear()
   UsersTable = {}
   while 1 do
      local line = read()
      local name, level 
      if line == nil then 
         readfrom()
         break 
      end
      s,e,name,level = strfind(line,"(.+)|.+|(.+)")
      if tonumber(level) ~= 0 then
         UsersTable[name] = 1
      end
   end   
end

--------------------------------------------------------------------- extracting the time/date when a user was last seen from the database
function SeenUser(user, data)
   s,e,who = strfind(data, "%b<>%s%S+%s(.+)")
   if who == nil then
      user:SendPM(Bot, "Syntax error, can't read your mind, pls tell me wich user you wanne check|")
   elseif Seen[who] then
      user:SendPM(Bot, who.." was last seen on: "..Seen[who].."|")
   else
      user:SendPM(Bot, who.." is a unknown user|")
   end
end

--------------------------------------------------------------------- shows all the nicks of all registered users
function NewShowUsers(user)
   local lines = {}
   local info = "\r\n\r\n"
   info = info.."  Here are the registered users\r\n"
   info = info.."=====================================\r\n"
   for a,b in UsersTable do
      tinsert(lines, a)
   end
   sort(lines)
   for i=1,getn(lines) do 
      info = info.."  "..lines[i].."\r\n"
   end
   info = info.."=====================================\r\n"
   user:SendPM(Bot, info.." |")
   Clear()
end

--------------------------------------------------------------------- shows all the nicks on the no clean list
function ShowNoClean(user)
   local lines =  {}
   local info = "\r\n\r\n"
   info = info.." Here are the users who aren't cleaned\r\n"
   info = info.."=====================================\r\n"
   for a,b in NoClean do
      tinsert(lines, a)
   end
   sort(lines)
   for i=1,getn(lines) do 
      info = info.."  "..lines[i].."\r\n"
   end
   info = info.."=====================================\r\n"
   user:SendPM(Bot, info.." |")
   Clear()
end

--------------------------------------------------------------------- cleanup old users
function CleanUsers()
   SendToAll(Bot, "The cleaner has been called. Every registered user who hasn't been in the hub for "..WEEKS.." weeks will be deleted. (contact the OP's if your gone be away for a period longer then that)|")
   OpenRegisterdUsersFile()
   local s,e,month,day,year = strfind(date("%x"), "(%d+)%/(%d+)%/(%d+)")
   year = "20"..year
   local juliannow = jdate(tonumber(day), tonumber(month), tonumber(year))
   local oldest = WEEKS*7
   for a,b in UsersTable do
      if Seen[a] then
         local s,e,monthu,dayu,yearu = strfind(Seen[a], "(%d+)%/(%d+)%/(%d+)")
         yearu = "20"..yearu
         local julianu = jdate(tonumber(dayu), tonumber(monthu), tonumber(yearu))
         if (juliannow - julianu) > oldest then
            SendToAll(Bot, a.." has been cleaned")
            Seen[a] = nil
            DelRegUser(a)
         end
      else
         Seen[a] = date("%x")
      end
   end 
   SaveSeen()
   OpenRegisterdUsersFile()
end

--------------------------------------------------------------------- don't clean this users adding/removing
function NoCleanUser(user, data)
   local s,e,who, addrem = strfind(data, "%b<>%s+%S+%s+(%S+)%s+(%S+)%s*")
   if (who or addrem) == nil then
      user:SendData(Bot, "RTFM ;). it's !noclean <user_name> <add/remove>|")
   elseif UsersTable[who] then
      if addrem == "add" then
         if NoClean[who] then
            user:SendData(Bot, who.." is allready on the imune list.|")
         else
            NoClean[who] = 1
            user:SendData(Bot, who.." is added to the imune list and won't be cleaned.|")
            SaveNoClean()
         end
      elseif addrem == "remove" then
         if NoClean[who] then
            NoClean[who] = nil
            user:SendData(Bot, who.." is removed from the imune list.|")
            SaveNoClean()
         else
            user:SendData(Bot, who.." was not on the imune list.|")
         end
      else
         user:SendData(Bot, "RTFM ;). it's !noclean <user_name> <add/remove>|")
      end
   else
      user:SendData(Bot, who.." isn't a registered user.|")
   end
end

--------------------------------------------------------------------- save no clean users 2 file
function SaveNoClean()
   writeto("userinfo/noclean.lst")
   for a,b in NoClean do
      write(a.."\n")
   end
   writeto()
end

--------------------------------------------------------------------- load no clean users from file
function LoadNoClean()
   readfrom("userinfo/noclean.lst")
   while 1 do
      local line = read()
      if line == nil then 
         readfrom()
         break 
      end
      NoClean[line] = 1
   end 
end

--------------------------------------------------------------------- do i need 2 explain this ?????
function DataArrival(user, data) 
   if AUTO == 1 then
      if CleanDay ~= date("%x") then -- user cleaning trigger, works as a timer without a timer
         CleanDay = date("%x")
         CleanUsers()
      end
   end
   if( strsub(data, 1, 1) == "<" ) then 
      if user.bOperator then
         data=strsub(data,1,strlen(data)-1) 
         s,e,cmd = strfind(data,"%b<>%s+(%S+)") 
         if cmd == "!noclean" then
            NoCleanUser(user, data)
            return 1
         elseif cmd == "!showusers" then
            NewShowUsers(user)
            return 1
         elseif cmd == "!shownoclean" then
            ShowNoClean(user)
            return 1
         elseif cmd == "!seen" then
            SeenUser(user, data)
            return 1
         elseif cmd =="!cleanusers" then
            CleanUsers()
            return 1
         end
      end
   end
end

--------------------------------------------------------------------- stuff done when a user/vip leaves
function UserDisconnected(user)
	if UsersTable[user.sName] then
      Seen[user.sName]=date("%x")
      SaveSeen()
   end
end

function OpDisconnected(user)
	if UsersTable[user.sName] then
      Seen[user.sName]=date("%x")
      SaveSeen()
   end
end

--------------------------------------------------------------------- stuff done on bot startup
function Main()
   OpenRegisterdUsersFile()
   LoadNoClean()
   LoadLastSeen()
   CleanDay = date("%x")
end