CC Printer Program

local printer -- printer var

do
-- find printer
for _,side in pairs(redstone.getSides()) do
    if peripheral.getType(side) == "printer" then
        printer = peripheral.wrap(side)
        break;
    end
end

-- printer check
if not printer then
    error("No printer block found!")
end
end

local function checkPrinterLevels()
-- check for ink
if printer.getInkLevel() == 0 then
    print("Please insert Ink!")
    while printer.getInkLevel() == 0 do
        os.sleep(0.5)
    end
end

-- check for paper
if printer.getPaperLevel() == 0 then
    print("Please insert Paper!")
    while printer.getPaperLevel == 0 do
        os.sleep(0.5)
    end
end
end

-- checks passed, let's print somethin'
local mw, mh
local h = 1;
local name;
local docs = 0
term.clear()
term.setCursorPos(1,1)

local function setupPage()
term.clear()
term.setCursorPos(1,1)
printer.newPage() -- new page
mw, mh = printer.getPageSize()
h = 1
printer.setCursorPos(1, h)

print("Page Size:")
print("Width: " .. mw)
print("Height: " .. mh)
print("")

print("Name this page:")
name = read()

printer.setPageTitle(name)

end

local function findDocuments()
    for _,item in pairs(fs.list("")) do
        if string.find(item,".txt") then
            print(item)
            docs = docs + 1
        end
    end
end

local function writeLine(line)
    checkPrinterLevels() -- ensure printer can print
    printer.write(line)
    if h < mh + 1 then
        h = h + 1 -- track page length
        printer.setCursorPos(1,h)
    else
        printer.endPage() -- prints finished page.
        -- start new page
        setupPage();
    end
end

local function readDocument(doc)
    local line = ""
    repeat
        line = writeLine(doc.readLine())
    until line == nil
end

local function loadDocument()
    print("Please choose file")
    local file = read()
    term.clear()
    term.setCursorPos(1, 1)

    if fs.exists(file) then
        setupPage()
        term.clear()
        term.setCursorPos(1, 1)
        print("Document found... Printing!")
        local doc = fs.open(file,"r")
        readDocument(doc)
        doc.close()
    else
        error("Document not found!")
    end
end

findDocuments()
if docs < 1 then
    error("No documents found!")
end

loadDocument()

term.clear()
term.setCursorPos(1,1)
print("Print Finished!")
print("Check printer for printed page(s)")