crap-networking-demo.lua

require "enet"

network = {
    status   = "[unloaded]",
    last_msg = "[no msg]"
}

function server_init(self)
    self.status = "[server]"

    self.received = 0
    self.sent = 0
    self.host = enet.host_create("localhost:31337")
end

function server_run(self)
    local event = self.host:service(0) -- 0ms timeout
    if event and event.type == "receive" then
        self.received = self.received + 1
        self.last_msg = event.data .. " from " .. tostring(event.peer)
    end
    self.status =
             string.format("[%s] %i↑ %i↓",
                           os.date("%x", os.time()),
                           self.sent,
                           self.received)
end

function client_init(self)
    self.status = "[client]"

    self.host   = enet.host_create()
    self.server = self.host:connect("localhost:31337")
    self.timeouts = 0
end

function client_run(self)
    local event = self.host:service(0)
    if event then
        if event.type == "connect" then
            self.status = "Connected to " .. tostring(event.peer)
            event.peer:send("Hi there")
        elseif event.type == "receive" then
            if event.data == "QUIT" then
                self.server:disconnect()
                self.host:flush()

                self.status = "[disconnected]"

                self.run    = function() end

                print("Client thread exiting")
            end
            self.last_msg = event.data
            event.peer:send("reply " .. event.data)
        end
    end
    self.timeouts = self.timeouts + 1
    if self.timeouts % 5 == 0 then
        self.server:send("timeout " .. self.timeouts)
    end

end

function love.draw()
    love.graphics.print(network.status, 0, 0)
    love.graphics.print(network.last_msg, 0, 20)
end

function love.update()
    network:run()
end
    
function love.load(arg)
    if arg[2] == "server" then
        print("Starting server")
        network.init = server_init
        network.run  = server_run
    else
        print("Starting client")
        network.init = client_init
        network.run  = client_run
    end

    network:init()
end