MultiMobLavaBot

RADIO="right"

controller = nil

function checkLavaOn()
	return turtle.compareTo(2)
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="lavabot"}))
		end
	elseif data["action"] == "lava" then
		if data["state"] == "on" then
			if checkLavaOn() then
				turtle.place()
			end
			rednet.send(controller, textutils.serialize({action="lava", state="on", type="multimob", device="lavabot"}))
		elseif data["state"] == "off" then
			if not checkLavaOn() then
				turtle.place()
			end
			rednet.send(controller, textutils.serialize({action="lava", state="off", type="multimob", device="lavabot"}))
		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="lavabot"}))
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
	end
end