--If you want this to start at every boot of a computer run the following line of code in the startup
-- shell.run("RFID","door")


--The door stays open as long as you stay in the area of the reader
--              !!! Make sure there is no creeper behind you !!!

-- Set up your own door system
doorPass = "wsxedcrfvbgtnhzmjuzvrnzcif" --Max Length 82 chars
cardLabel = "Ident: Front Door"         --Max Length 20 chars
--Make sure the following sides are equal to your build
readerSide = "left"
writerSide = "right"
redstoneSide = "bottom"

--Variables (Don´t change)
tArgs = {...}
lastTimer = {}

-- Check the arguments given
if #tArgs < 1 then
        print("Usage:")
        print("RFID write")
        print("RFID door")
        return
end

mode = tArgs[1]
shell.run("clear")

if mode == "write" then
        writer = peripheral.wrap(writerSide)
        print("Enter writing mode")
        print("Insert card in the writer")
        while not writer.isPresent() do --Waits until a card is in the writer
                sleep(0)
        end

        if writer.encode(doorPass, cardLabel) then --Start write to card
                print("Start writing Pass to card")
        else --Error handling
                if writer.isCoded() then
                        print("Card is already coded\nInsert a blank card")
                elseif #cardLabel > 20 then
                        print("Card Label is too long max. 20 char")
                elseif #doorPass > 82 then
                        print("Data is too long max. 82 char")
                else
                        print("Leave the card in the writer")
                end
                return
        end
        os.pullEvent("rfid_written") --Wait until the card is written
        print("RFID card is coded")
        print("Take the card out of the writer")

        while writer.isCoded() do --Ends the program when the card is taken out of the writer
                sleep(0)
        end
        shell.run("clear")

------------------------------------------------------
------------------------------------------------------
elseif mode == "door" then
        reader = peripheral.wrap(readerSide)
        print("Door Contol is running")
        while true do
                reader.scan() --Creats an "rfid_detected" when a card is in range
                event, p1 = os.pullEvent()
                if event == "rfid_detected" then
                        if p1 == doorPass then
                                rs.setOutput(redstoneSide, true)
                                lastTimer = os.startTimer(1)
                        end
                elseif event == "timer" and lastTimer == p1 then
                        rs.setOutput(redstoneSide, false)
                end
        end
end