crd

--shows RFID card data
--[[
local shell = require("shell")
shell.setWorkingDirectory("/mnt/335/");
shell.execute("crd")
]]--

local event = require("event")
local term = require("term")
local unicode = require("unicode") 
local rfidreader = require("component").os_rfidreader

require("component").gpu.setResolution(48,12)

function splitBySymbol(nstr, nchar)
  local res={}
  local t="_"
  local cnt=1
  while (true) do
    t=""
    for i = 1, unicode.len(nstr) do 
      if(unicode.sub(nstr, i,i)==nchar) then
        t = unicode.sub(nstr, 1,i-1)
        nstr = unicode.sub(nstr, i+1)
        break
      end
    end
    if(t=="")then
      break
    end
    res[cnt]=t
    cnt = cnt+1
  end
  res[cnt]=nstr
  return res
end 

function pt(ndict) for k,v in pairs(ndict) do print(k) end end

function scanRfid(ndist)
  term.clear()
  rfidreader.scan(ndist)
  local _, _, nick0,dist,data,id = event.pull(0.2, "rfidData")
  local nick
  local other
  if(data ~= nil) then
    print(data)
    _, nick, other = table.unpack(splitBySymbol(data,'/'))
  end
  return nick, other
end

term.clear()
-- while true do
  print(scanRfid(4))
  -- require("os").sleep(0.5)
-- end