printclient api

local printerid
local cur_docid = 1
local function packet(iType, id, cmd, data)
  if type(data) == "table" then
    data = textutils.serialize(data)
  end
  rednet.send(printerid, textutils.serialize({dataroot = {["type"] = iType, packetid = id, cmd = cmd, data = data}}))
end

local function waitForRespose()
  while true do
    id, msg, disance = rednet.read(5)
    if id == nil then return false, "Connection timed out" end
    if id == printerid then
      p = textutils.unserialize(msg)
      if p.dataroot == nil then
        return false, "Unknown Packet received. Printserver may be bugged"
      end
      p = p.dataroot
      if p['type'] == 5 then
        return false, p.data
      elseif p['type'] == 6 then
        return true, p.data
      else
        return false, "Unknown Packet received. Printserver may be bugged"
      end
    end
  end
end

function getCursorPos()
  -- Not avaible yet
  return nil
end

function getPaperLevel()
  -- Not avaible yet
  return nil
end

function setCursorPos(docid, x, y)
  packet(3, docid, "setCursorPos", {x, y})
  return waitForResponse()
end

function newPage(docid)
  packet(3, docid, "newPage", {})
  return waitForResponse()
end

function write(docid, text)
  packet(3, docid, "write", {text})
  return waitForResponse()
end

function setPageTitle (docid, title)
  packet(3, docid, "setPageTitle", {title})
  return waitForResponse()
end

function endPage (docid)
  packet(3, docid, "endPage", {})
  return waitForResponse()
end

function startPrinting(printerid)
  local docid = curdocid..os.time()..os.computerID()
  curdocid = curdocid + 1
  packet(1, docid, "", "")
  s, m = waitForResponse()
  if s then
    return true, m, docid
  else
    return false, m
  end
end

function endPrinting(docid)
  packet(2, docid, "", "")
  return waitForResponse()
end