rednet.open("top")

local names={}
local f=fs.open("/card-index","r")
if f then

local s=f.readLine()
while s do
for name,pass in string.gmatch(s,"(.-)|(.-)|") do
print(name,"|",pass)
names[name]=pass
end
s=f.readLine()
end
f.close()
end

while true do
  local id,data=rednet.receive()

  if data:sub(1,11)=="CARD|CHECK|" then
    local ok=false
    print("Checking "..data:sub(11).." from id "..id)
    for name,pass in string.gmatch(data:sub(11),"|(.-)|(.-)|") do
      for k,v in pairs(names) do
        if k==name and v==pass then
          ok=true
          break
        end
      end
    end
    print(ok)
    if ok then rednet.send(id,"CARD|OK") else
      rednet.send(id,"CARD|BAD")
    end
  elseif data:sub(1,9)=="CARD|ADD|" then
    print("adding card " .. data:sub(9).. " from id "..id)
    local f=fs.open("/card-index","a")
    f.write(data:sub(10))
  elseif id~=176 then print(data) end
end