View difference between Paste ID: 0w3ays8x and x7K3zUAC

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 --	Tank module for caftNanny
 --	by demethan
 --	www.breakfastcraft.com
 --  www.craftnanny.org
 --  2015 08 12  demethan:
 --		-fixed modem support
 --		-did some error magement
 -- 		-added visual bar
 ---------------------------------------------
 
 -- variables
 
 local containers={}
 local version = 1
 
 local installer = "Q8ah3K9S"
 local token = '0'
 local module_name = ''
 local username = ''
 local type = ''
 
 -- write text to the terminal screen
 function draw_text_term(x, y, text, text_color, bg_color)
   term.setTextColor(text_color)
   term.setBackgroundColor(bg_color)
   term.setCursorPos(x,y)
   write(text)
 end
 
 -- draw a line on the terminal screen
 function draw_line_term(x, y, length, color)
     term.setBackgroundColor(color)
     term.setCursorPos(x,y)
     term.write(string.rep(" ", length))
 end
 
 function bars()
 	draw_line_term(1, 1, 51, colors.lime)
 	draw_line_term(1, 19, 51, colors.lime)
 	draw_text_term(15, 1, 'CraftNanny Fluid Module', colors.gray, colors.lime)
 	draw_text_term(10, 19, 'www.craftnanny.org', colors.gray, colors.lime)
 end
 
 function terminal_screen()
 	term.clear()
 
 	bars()
 	draw_text_term(1, 2, 'Module: ', colors.lime, colors.black)
 	draw_text_term(10, 2, module_name, colors.white, colors.black)
 	draw_text_term(1, 3, 'Owner: ', colors.lime, colors.black)
 	draw_text_term(8, 3, username, colors.white, colors.black)
 	draw_text_term(1, 4 , string.rep("-", 51), colors.lime, colors.black)
 
 	--draw_text_term(2, 8, "I dont know what to put here...", colors.white, colors.black)
 end
 
 -- retrieves token from local text file
 function load_config()
   sr = fs.open("config.txt", "r")
     token = sr.readLine()
 	module_name = sr.readLine()
 	username = sr.readLine()
 	type = sr.readLine()
   sr.close()
 end
 
 -- called for new installations and when the scanner needs to be updated
 function run_installer()
 	if fs.exists("install") then
 	    fs.delete("install")
 	  end
 	  shell.run("pastebin get "..installer.." install")
 	  sleep(1)
 	  shell.run("install")
 end
 
 
 ------  Start module specific code ---------
 
 
 function phone_home(tank_name, fluid_type, percent)
     response = http.post("http://craftnanny.org/code/fluid.php",
     			"token="..token.."&id="..os.getComputerID().."&tank_name="..tank_name.."&fluid_type="..fluid_type.."&percent="..percent)
 	return_string = response.readAll()
 
 	if tonumber(return_string) > version then
 			run_installer()
 	end
 end
 
 
 --functions
 function findSide()
 	local face
 	if peripheral.isPresent("left") then
 		face="left"
 		return true, face
 	elseif peripheral.isPresent("right") then
 		face="right"
 		return true, face
 	elseif peripheral.isPresent("bottom") then
 		face="bottom"
 		return true, face
 	elseif peripheral.isPresent("top") then
 		face="top"
 		return true, face
 	elseif peripheral.isPresent("back") then
 		face="back"
 		return true,face
 	else
 		face=""
 		return false,face
 	end
 end
 
 function round(num, idp)
   local mult = 10^(idp or 0)
   return math.floor(num * mult + 0.5) / mult
 end
 
 function getTankInformation(t,tankName)
 				tnk=peripheral.wrap(t)
 				okLiquid,msg = pcall(tnk.getTankInfo)
 				if okLiquid then
 					tankTbl=tnk.getTankInfo()
 					capacity=tankTbl[1].capacity
 					contentsTbl=tankTbl[1].contents or {["rawName"]="nothing",["amount"]=0}
 					tankContentName=contentsTbl.rawName
 					tankContentAmount=contentsTbl.amount
 					percent=round((tankContentAmount/capacity*100),2)
 
 					--print(tankName," ",tankContentName," ",percent," %        ")
 					phone_home(tankName, tankContentName, percent)
 
 					print(tankContentName," :")
 					graphBar= round(((term.getSize()*percent)/100),0)
 					if graphBar < 50 then
 						draw_line_term(6, 7, graphBar , colors.green)
 						draw_line_term(6+graphBar,7,term.getSize()-graphBar-6,colors.red)
 						draw_text_term(1,7,percent.." % ",colors.lime,colors.black)
 						term.setBackgroundColor(colors.black)
 					else
 						draw_line_term(6, 7, graphBar -6 , colors.green)
 						draw_text_term(1,7,percent.." % ",colors.lime,colors.black)
 						term.setBackgroundColor(colors.black)
 					end
 					return true
 				else
 					return false
 				end
 end
 
 function notanks()
 	-- relavent error msg
 end
 
 
 function start_loop()
 	ok,side=findSide ()
 	if not ok then
 		print("No tank storage found")
 	end
 
 	tanks = peripheral.getNames()
 
 	while true do
 		terminal_screen()
 
 		if #tanks > 2 then
 			print("Only one device is supported")
 			break
 		elseif #tanks == 2 then
 			 for tankNo,tank in pairs(tanks) do
 			 	if tank~=side then
 			 	ok = getTankInformation(tank,tank)
 			 	end
 
 			 end
 
 		else
 			ok = getTankInformation(side,"Tank"..os.getComputerID())
 		end
 			if not ok then
 					print("No tank storage found")
 					print("Do you have the right module?")
 					print("Please check your modems")
 					break
 				end
 		-- main active status with server
 		sleep(30)
 	end
 end
 
 function start()
 	term.clear()
 	term.setCursorPos(1,1)
 
   if fs.exists("config.txt") then
       load_config()
 	  start_loop()
   else
   	  run_installer()
   end
 end
 
 start()