local id = os.getComputerID()

function openRednet()
  local listOfSides = rs.getSides()
  listofPossibles = {}
  local counter1 = 0
  while true do
    counter1 = counter1+1

    if peripheral.isPresent(tostring(listOfSides[counter1])) and peripheral.getType(listOfSides[counter1]) == "modem" then
     table.insert(listofPossibles,tostring(listOfSides[counter1]))
    end

    if counter1 == 6 and table.maxn(listofPossibles) == 0 then

     return nil
    end

    if counter1 == 6 and table.maxn(listofPossibles) ~= 0 then
     rednet.open(listofPossibles[1])
     return listofPossibles[1]
    end
  end
end

openRednet()

if fs.exists('clients') == false then
  fs.makeDir('clients')
  local file = fs.open('clients/cids','w')
  file.close()
else
end

while true do
  cID,cName = rednet.receive()
  sleep(0.5)
  if fs.exists('clients/'..cID)then
    print('Client already installed')
    rednet.send(cID, 'done')
  else
    local file = fs.open('clients/'..cID,'w')
    file.write(cName)
    file.close()
    local file = fs.open('clients/cids','r')
    local data = file.readAll()
    file.close()
    data = textutils.unserialize(data)
    if data == nil then
      data = {}
    end
    table.insert(data, tonumber(cID))
    local file = fs.open('clients/cids','w')
    file.write(textutils.serialize(data))
    print('Client Install Successful')
    rednet.send(cID, 'done')
  end
end