--------------------- 

-- LEECHBLOCKER 02 -- for PtokaX TD4 

--------------------- 

-- Created by SAMPLERman - HUB: samplerman.no-ip.info 

-- 5/August/2003 

-- Based on an idea by OpiumVolage and RabidWombat 

-- And thanks AGAIN to RabidWombat for new ideas 



-- This LUA script prevents users that are not registered in the hub (=aliens) 

-- from connecting to other users (for downloading). 

-- New users (=aliens) can chat, upload and be searched. They just can't download. 



-- This way your previously private hub can again be public. 



-- Optionally, the script also blocks searches (from nonregged users). 

-- However, it is recommended that you allow everyone to search your hub, so that 

-- new users know what they are missing. 



-- NEW in version 02: 

-- To allow an alien to download for 1 session, OPs can type this command: 

-- !letleech <username> 



-- To do for next version: 

-- Optionally, aliens can download off of other aliens 



-- There are 2 kinds of hubs: 

-- 1) Open hubs for sharing anything 

-- 2) Small hubs that concentrate on a special interest (e.g. classical sheet music) 



-- This script is NOT recommended for hub kind #1, where it is enough to 

-- control how many GB users are sharing. 

-- Because in hub type #1 there is no point in registering users, this script 

-- should be adapted to make shared amount the criteria for letting download. 

-- Even better, for hub type #1 users who share little should be allowed to download 

-- from other people who share little. 

-- Freedom is a strength of the Direct Connect community; please do not cut into 

-- people's freedom except when absolutely necessary. 

-- This script is only for closed hubs with a very specific subject. 



------------------------------- 

-- SOURCES OF SCRIPTING INFO -- 

------------------------------- 

-- Scripting.txt (comes with PtokaX) 

-- <http://lua.bcs-solutions.de/> 

-- LUA reference manual 4.0.pdf 



---------------------- 

-- GLOBAL VARIABLES -- make changes here only 

---------------------- 

smDebugging = "0" -- Default is "0" (silent mode). "1" sends msgs to OPs 

smBlockSearches = "0" -- Default is "0" (do not block searches) 

smBlockSearchExceptions = { "scores", "sheet music" } 



MsgToAliens = "\t\t\t*** warning***\r\n\t".. 

"YOU ARE UNABLE TO DOWNLOAD IN THIS HUB\r\n\t".. 

"Only registered users can download.\r\n\t".. 

"You still can search and chat...\r\n\t".. 

"...but the hub won't let you download until you register.\r\n".. 

"\tIn order to become a registered member:\r\n\t".. 

"1) Share classical sheet music in a separate folder called SCORES\r\n\t".. 

"2) only then, ask an OP for a password.\r\n\t".. 

"We hope you will join us." 



LetLeechCommand = "!letleech" 



---------------------------------- 

-- Do not change anything below -- 

---------------------------------- 

smBot = frmHub:GetHubBotName() -- This line gets bot name from PtokaX hubsoftware; 

-- therefore, your Hub Bot should be enabled. 



ToBlock = { "^$ConnectToMe%s(%S+)", "^$RevConnectToMe%s(%S+)", "^$Search%s+(%S+)"} 

LetLeech = {} 



--// This function is called when hub or script starts 

function Main() 

frmHub:EnableFullData(1) 

frmHub:UnregBot(smBot) 

frmHub:RegBot(smBot) 

--// If thus configured, remove search from blocking table: 

if smBlockSearches == "0" then 

for i,v in ToBlock do 

if v == "^$Search%s+(%S+)" then ToBlock[i] = nil end 

end 

end 

end 



--// This function is fired when a new user (non-OP) finishes login 

function NewUserConnected(user) 

if user.iProfile == -1 then 

user:SendPM(smBot,"\r\n"..MsgToAliens) 

end 

end 



--// This function is fired when new data arrives 

function DataArrival (user, data) 



--// See if data is the !letleech command: 

if strsub(data, 1, 1) == "<" then 

local line=strsub(data,1,strlen(data)-1) -- remove last char 

local s,e,cmd = strfind(line, "%b<>%s+(%S+)") 

local s,e,arg = strfind(line, "%b<>%s+%S+%s+(%S+)") 

if strlower(cmd)==strlower(LetLeechCommand) then 

if user.iProfile ~= 0 and user.iProfile ~= 1 then 

SendToAll(smBot, "...but you are not an OP!") 

return nil 

end 

who = GetItemByName(arg) 

if not who then 

SendToOps(smBot, arg.." is not online.") 

return 1 

end 

if who.iProfile ~= -1 then 

SendToOps(smBot, arg.." is registered and does not need a leech license.") 

return 1 

end 

LetLeech[arg] = 1 

SendToOps(smBot,arg.." has been granted a special leech license.") 

who:SendData(smBot,arg..", you are now authorized to download for this session.") 

return 1 

end 

end 



--// See if data should be blocked: 

for _,blockstring in ToBlock do 

local _, _, who = strfind(data, blockstring) 

if who then return smBlock(user,data,who) end 

end 

end 



function smBlock(user,data,who) 

local report 

local profnam = GetProfileName(user.iProfile) 

if profnam then 

profnam = strlower(profnam) 

else 

profnam = "alien" 

end 

--// Activity by Masters, OPs, VIPs and REGs are just reported to OPs: 

--// Also, searches pass if they are in the exception list: 

--// Data also passes if user is in LetLeech list: 

if (user.iProfile ~= -1) or smMatchException(data) 

or IsInLeechList(user) then 

report = "\t"..user.sName.." ("..profnam..") sends:\r\n\t"..data 

smDebugToOPs(report) 

return nil 

end 

--// Alien (not registered) users get blocked: 

local report = "\tBlocked from "..user.sName.." (".. 

profnam.."):\r\n\t"..data 

smDebugToOPs(report) 

return 1 

end 



function smMatchException(data) 

if strfind (data, "^$Search%s+(%S+)") then 

for _,exceptword in smBlockSearchExceptions do 

if strfind (strlower(data), strlower(exceptword)) then 

return 1 

end 

end 

end 

return nil 

end 



function IsInLeechList(user) 

for i,v in LetLeech do 

if i == user.sName then return 1 end 

end 

return nil 

end 



function smDebugToOPs(data) 

if smDebugging == "1" then 

SendToOps(smBot,data) 

end 

end