chat server

-- Server code
local modem = peripheral.wrap("back")  -- Assuming the modem is on the back of the computer

-- Unique identifier for this computer
local myID = os.getComputerID()

-- Function to broadcast a message to all connected clients except the sender
local function broadcast(channel, message, sender)
    modem.transmit(channel, channel, {message = message, sender = myID})
end

-- Ask the user to configure the channel
print("Enter the channel number to listen on:")
local channel = tonumber(read())

-- Open the channel
modem.open(channel)
print("Listening on channel " .. channel)

-- Main loop
while true do
    local event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")

    if senderChannel == channel then
        if message.sender ~= myID or message.sender ~= message.sender then
            print("Received: " .. message.message)
            broadcast(channel, message.message, message.sender)
        else
            print("Ignoring message from self.")
        end
    end
end