MultiMobBot

RADIO="right"
SLEEP = 0.1

currentTimer = nil
attacking = false

controller = nil

function emptyItems(stay)
    rednet.send(controller, textutils.serialize({action="dump", type="multimob", device="xpbot"}))
    turtle.turnRight()
    turtle.turnRight()
    turtle.forward()
    for i = 1, 16 do
        turtle.select(i)
        turtle.drop(turtle.getItemCount(i))
    end
    turtle.turnRight()
    turtle.turnRight()
    if stay == nil then
        turtle.forward()
    end
end

function processMessage(data)
    if data["action"] == "acknowledge" or (data["action"] == "announce" and data["device"] == "controller") then
        controller = data["computer_id"]
        if data["action"] == "announce" then
            rednet.send(data["computer_id"], textutils.serialize({action="acknowledge", type="multimob", device="xpbot"}))
        end
    elseif data["action"] == "attack" then
        if data["state"] == "on" and not attacking then
            turtle.forward()
            attacking = true
            currentTimer = os.startTimer(SLEEP)
            rednet.send(controller, textutils.serialize({action="attack", state="on", type="multimob", device="xpbot"}))
        elseif data["state"] == "off" and attacking then
            currentTimer = nil
            emptyItems(true)
            attacking = false
            rednet.send(controller, textutils.serialize({action="attack", state="off", type="multimob", device="xpbot"}))
        end
    end
end

if peripheral.isPresent(RADIO) and peripheral.getType(RADIO) == "modem" then
    rednet.open(RADIO)
    rednet.broadcast(textutils.serialize({action="announce", type="multimob", device="xpbot"}))
else
    print("Modem not found")
    return
end

while true do
    ev,p1,p2,p3 = os.pullEvent()
    if ev == "rednet_message" then
        data = textutils.unserialize(p2)
        if data["type"] == "multimob" then
            data["computer_id"] = p1
            processMessage(data)
        end
    elseif ev == "timer" and currentTimer == p1 then
        turtle.attack()
        if turtle.getItemCount(16) > 16 then
            emptyItems()
        end
        currentTimer = os.startTimer(SLEEP)
    end
end