Automatic File Copier

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-- Automatic File Copier --
--        For CC         --
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-- Written by Onionnion  --
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-- This script is released with the CC license! --
---------------- Go crazy with it! ---------------
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function resetScreen(quitQ,numberMade,label) -- function that resets the screen
    term.clear()           -- clears terminal
    term.setCursorPos(1,1) -- sets cursor's position
    if quitQ == true then  --if quitQ is true, which starts out as false at line 10
        if label == nil then
            print("Current disk label: numerical")
        elseif label == 0 then
            print("Current disk label: None")
        else
            print("Current disk label: "..label)
        end
        print("Copies Made: "..tostring(numberMade)) -- prints total made
        print("Press L to change the label.")
        print("Press C to change the copying operation.")
        print("Press Q to quit.")
    end
end

function labeler()
    while true do
        resetScreen()
        print("How would you like label the disks?\n(Enter number for selection.)")
        print("1: Number (1, 2, 3..etc.)")
        print("2: Custom Label")
        print("3: No label")
        local whatDo = read()
        if whatDo == "1" then
            label = nil
            break
        elseif whatDo == "2" then
            resetScreen()
            write("Enter the label: ")
            label = read()
            break
        elseif whatDo == "3" then
            label = 0
            break
        else
            resetScreen()
            print("Not a correct input, try again")
            sleep(2)
        end
    end
    resetScreen(quitQ,numberMade,label)
end

function copyChange()
    while true do -- file I/O
        resetScreen()
        write("File to Copy: ")
        fileIn = read()  -- input file
        write("Location/Name to copy to: ")
        fileOut = read() -- output file
        if fs.exists(fileIn) == false or fs.exists(fileOut) == true then -- if input file isn't there or if output file already exists
            resetScreen()
            print("Invalid inputs! Try again.")
            print("(Maybe file incorrect file to be copied or file to be created is already there?)")
            sleep(2)
        else
            break
        end
    end
    resetScreen(quitQ,numberMade,label)
end

local side = ""      -- side disk drive is on
local numberMade = 0 -- keeps track of how many were made
local quitQ = false  -- quitQ is going to be short for quit-Question, meaning if false,
                     --   do not display the option to quit yet until able to

resetScreen(quitQ)
print("Insert a disk into the drive to be used.")
while true do
    local event, param = os.pullEvent()
    if event == "disk" then
        side = param
        break
    end
end

labeler()
copyChange()
quitQ = true -- sets quitQ to true
                    -- it's always a good idea to keep comments orderly like you see here and above

while true do
    resetScreen(quitQ,numberMade,label)
    event, param = os.pullEvent()
    if event == "disk" then
        if fs.exists(fileOut) == true then -- if the file is already there (can't overwrite with cp!)
            print("File already there! Please insert another disk.")
            print("Press any button to eject and continue.")
            while true do
                local event = os.pullEvent()
                if event == "char" or event == "key" then
                    disk.eject(side)
                    resetScreen(quitQ,numberMade)
                    break
                end
            end
        else
            fs.copy(fileIn, fileOut) -- copies with variables
            if label ~= nil and label ~= 0 then
                disk.setLabel(side, label)
            elseif label == 0 then
                ---
            else
                disk.setLabel(side, tostring(numberMade + 1))
            end
            numberMade = numberMade + 1 -- add one to the count
            disk.eject(side)
            resetScreen(quitQ,numberMade,label)
        end
    end
    if event == "char" and param == "l" then
        labeler()
    elseif event == "char" and param == "c" then
        copyChange()
    elseif event == "char" and param == "q" then -- test if quit button was pressed
        break -- break exits the loop; jumps right down to the 'print'
    end
end

quitQ = false
resetScreen(quitQ)
print("Bye!")
sleep(1)
resetScreen(quitQ)