parent
b2a12cc2dc
commit
3508870c7f
@ -1,261 +1,184 @@
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local component = require("component")
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local event = require("event")
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local serializer = require("serialization")
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local serialization = require("serialization")
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local uuid = require("uuid")
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local BC_VERSION = {0, 1}
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local BC_PORT = 0xBC00 | (BC_VERSION[1] << 4) | BC_VERSION[2]
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local Version = {0, 1}
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local Message = {
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Hello = 0x48454c4f,
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Register = 0x00524547,
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Disband = 0x44524547,
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Register = 0x52454749,
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Deregister = 0x44524547,
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NounRequest = 0x4e524551,
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NounResponse = 0x4e524553,
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VerbRequest = 0x56524551,
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VerbResponse = 0x56524553,
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ListenRequest = 0x4c524551,
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ListenNotify = 0x4c4e4f54,
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ListenCancel = 0x4c535450,
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}
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local Event = {
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Change = 1,
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Rising = 2,
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Falling = 3,
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Equals = 4,
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Above = 5,
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Below = 6,
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local function query_param(self, v)
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return {ty=self.ty, v=v}
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end
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local Query = {
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Change = {ty=0x434847},
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Rising = {ty=0x524953},
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Falling = {ty=0x46414c},
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Equals = setmetatable({ty=0x455155}, {__call=query_param}),
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Above = setmetatable({ty=0x414256}, {__call=query_param}),
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Below = setmetatable({ty=0x424c4f}, {__call=query_param}),
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}
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local bc = {
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_version = BC_VERSION,
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_default_port = BC_PORT,
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Event = Event,
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Message = Message,
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-- Network ---------------------------------------------------------------- {{{
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local Network = {
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default_port = 0xBC00 | (Version[1] << 4) | Version[2],
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}
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bc.__index = bc
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-- Helpers
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local function send_msg(self, remote, msg_table)
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self.modem.send(remote, self.port, serializer.serialize(msg_table))
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end
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local function broadcast_msg(self, msg_table)
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self.modem.broadcast(self.port, serializer.serialize(msg_table))
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function Network:new(modem, port)
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if type(modem) == "number" then
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port = modem
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modem = nil
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end
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local self = {
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modem = modem or require("component").modem,
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port = port or Network.default_port,
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}
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setmetatable(self, {__index=Network})
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function bc:has_noun(noun)
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return self.local_nouns[noun] ~= nil or self.remote_nouns[noun] ~= nil
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return self
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end
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setmetatable(Network, {__call=Network.new})
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function bc:set_noun(noun, value)
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local last_value = self.local_nouns[noun]
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if last_value ~= nil then
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self.local_nouns[noun] = value
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for id, par in pairs(self.remote_listeners[noun]) do
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if (par.event == Event.Change and value ~= last_value)
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or (par.event == Event.Rising and value > last_value)
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or (par.event == Event.Falling and value < last_value)
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or (par.event == Event.Equals and value == par.evparam)
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or (par.event == Event.Above and value > par.evparam)
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or (par.event == Event.Below and value < par.evparam)
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then
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send_msg(self, par.addr, {ty=BC_MESSAGE.LISTEN_NOTIFY, id=id, value=value})
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end
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end
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else
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error("Noun \""..noun.."\" does not exist or is non-local!")
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function Network:start(callback)
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self.modem.open(self.port)
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self.listener = function(_, addr_lo, addr_remote, port, _, msg)
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-- Filter everything we don't care about
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if addr_lo ~= self.modem.address then return end
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if port ~= self.port then return end
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callback(addr_remote, serialization.unserialize(msg))
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end
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require("event").listen("modem_message", self.listener)
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end
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function bc:get_noun(noun)
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if self.local_nouns[noun] ~= nil then
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return self.local_nouns[noun]
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elseif self.remote_nouns[noun] ~= nil then
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send_msg(self, self.remote_nouns[noun], {
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ty = BC_MESSAGE.NOUN_REQUEST,
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noun = noun,
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})
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local value
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event.pullFiltered(self.timeout, function(ev, ...)
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if ev ~= "modem_message" then return false end
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if select(2, ...) ~= self.remote_nouns[noun] then return false end
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if select(3, ...) ~= self.port then return false end
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local msg = serializer.unserialize(select(5, ...))
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if msg.ty ~= BC_MESSAGE.NOUN_RESPONSE then return false end
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if msg.noun ~= noun then return false end
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value = msg.value
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return true
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end)
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return value
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else -- Not found at all
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return nil
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end
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function Network:send(addr, msg)
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self.modem.send(addr, self.port, serialization.serialize(msg))
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end
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function bc:listen(noun, event, evparam, callback)
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-- You can leave out evparam
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if type(evparam) == "function" then
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callback = evparam
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evparam = nil
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function Network:broadcast(msg)
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self.modem.broadcast(self.port, serialization.serialize(msg))
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end
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local remote_addr = self.remote_nouns[noun]
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if remote_addr == nil then
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error("Noun \""..noun.."\" is not listenable!")
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else
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local id = uuid.next()
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self.local_listeners[id] = {addr=remote_addr, callback=callback}
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send_msg(self, remote_addr, {
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ty=BC_MESSAGE.LISTEN_REQUEST,
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noun=noun,
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event=event,
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evparam=evparam,
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id=id,
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})
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return id
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end
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function Network:stop()
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require("event").ignore("modem_message", self.listener)
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self.modem.close(self.port)
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end
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-- }}}
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-- BaseControl ------------------------------------------------------------ {{{
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local BaseControl = {
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version = Version,
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Message = Message,
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Query = Query,
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Network = Network,
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}
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function BaseControl:new(self, network)
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local self = {
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locals = {
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nouns = {},
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verbs = {},
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},
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remotes = {
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nouns = {},
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verbs = {},
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},
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live = false,
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network = network or Network:new(),
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}
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setmetatable(self, {__index=BaseControl, __call=BaseControl.new})
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self.network:start(function() error("net unimplemented") end)
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function bc:cancel(id)
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local l = self.local_listeners[id]
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send_msg(self, l.addr, {ty=BC_MESSAGE.LISTEN_CANCEL, noun=l.noun, id=id})
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self.local_listeners[id] = nil
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return self
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end
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function bc:has_verb(verb)
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return self.local_verbs[verb] ~= nil or self.remote_verbs[verb] ~= nil
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function BaseControl:register(name, value)
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if self.live then
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error("can't register \""..name.."\" after finalizing")
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end
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function bc:call_verb(verb, ...)
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if self.local_verbs[verb] ~= nil then
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self.local_verbs[verb](self, nil, ...)
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elseif self.remote_verbs[verb] ~= nil then
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send_msg(self, self.remote_verbs[verb], {
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ty=BC_MESSAGE.VERB_REQUEST, verb=verb, param={...},
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})
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if type(value) == "function" then
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if self.locals.verbs[name] ~= nil then
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error("\""..name.."\" already registered")
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else
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error("Verb \""..verb.."\" does not exist!")
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self.locals.verbs[name] = value
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end
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else
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if self.locals.nouns[name] ~= nil then
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error("\""..name.."\" already registered")
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else
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self.locals.nouns[name] = value
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end
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function bc:cleanup()
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event.ignore("modem_message", self._modem_listener)
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local nouns, verbs = self:locals()
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broadcast_msg(self, {
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ty=BC_MESSAGE.DISBAND,
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nouns=nouns,
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verbs=verbs,
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})
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end
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function bc:locals()
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local nouns, verbs = {}, {}
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for noun in pairs(self.local_nouns) do table.insert(nouns, noun) end
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for verb in pairs(self.local_verbs) do table.insert(verbs, verb) end
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return nouns, verbs
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end
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local function new(_, local_nouns, local_verbs, overrides)
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local self = {
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local_nouns=local_nouns or {},
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local_verbs=local_verbs or {},
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remote_nouns={},
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remote_verbs={},
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local_listeners={},
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remote_listeners={},
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port=BC_PORT,
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modem=component.modem,
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timeout=5,
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}
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if overrides ~= nil then
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for name, value in pairs(overrides) do
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self[name] = value
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end
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function BaseControl:finalize(waits, timeout)
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local self = self
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if self == BaseControl then
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-- Called as a constructor
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self = BaseControl:new()
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end
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setmetatable(self, bc)
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for noun in pairs(self.local_nouns) do
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self.remote_listeners[noun] = {}
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self.live = true
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return self
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end
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self._modem_listener = function(_, _, remote_addr, port, _, msg)
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if port ~= self.port then -- Ignore other ports
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return
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-- Nouns {{{
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function BaseControl:has_noun(noun)
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return self.locals.nouns[noun] ~= nil or self.remotes.nouns[noun] ~= nil
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end
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local msg = serializer.unserialize(msg)
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if msg.ty == BC_MESSAGE.HELLO then
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local nouns, verbs = self:locals()
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send_msg(self, remote_addr, {
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ty=BC_MESSAGE.REGISTER,
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nouns=nouns,
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verbs=verbs,
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})
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elseif msg.ty == BC_MESSAGE.REGISTER then
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for _, noun in ipairs(msg.nouns or {}) do
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self.remote_nouns[noun] = remote_addr
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end
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for _, verb in ipairs(msg.verbs or {}) do
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self.remote_verbs[verb] = remote_addr
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end
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elseif msg.ty == BC_MESSAGE.NOUN_REQUEST then
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send_msg(self, remote_addr, {
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ty=BC_MESSAGE.NOUN_RESPONSE,
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noun=msg.noun,
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value=self.local_nouns[msg.noun],
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})
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elseif msg.ty == BC_MESSAGE.VERB_REQUEST then
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local callback = self.local_verbs[msg.verb]
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if callback ~= nil then
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callback(self, remote_addr, table.unpack(msg.param))
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function BaseControl:nouns(local_only)
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local nouns = {}
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for noun in pairs(self.locals.nouns) do
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table.insert(nouns, noun)
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end
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elseif msg.ty == BC_MESSAGE.LISTEN_REQUEST then
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if self.local_nouns[msg.noun] ~= nil then
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self.remote_listeners[msg.noun][msg.id] = {
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event=msg.event,
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evparam=msg.evparam,
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addr=remote_addr,
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}
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end
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elseif msg.ty == BC_MESSAGE.LISTEN_NOTIFY then
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local listener = self.local_listeners[msg.id]
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if listener ~= nil and listener.addr == remote_addr then
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listener.callback(msg.value)
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end
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elseif msg.ty == BC_MESSAGE.LISTEN_CANCEL then
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if self.remote_listeners[msg.noun] ~= nil then
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self.remote_listeners[msg.noun][msg.id] = nil
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-- TODO: Remote
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return nouns
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end
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elseif msg.ty == BC_MESSAGE.DISBAND then
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for _, noun in ipairs(msg.nouns or {}) do
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if self.remote_nouns[noun] == remote_addr then
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self.remote_nouns[noun] = nil
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function BaseControl:get(noun, timeout)
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if self.locals.nouns[noun] ~= nil then
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return self.locals.nouns[noun]
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elseif self.locals.verbs[noun] ~= nil then
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error("\""..noun.."\" is not a noun")
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else
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return nil
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end
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end
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for _, verb in ipairs(msg.verbs or {}) do
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if self.remote_verbs[verb] == remote_addr then
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self.remote_verbs[verb] = nil
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function BaseControl:set(name, value)
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error("set unimplemented")
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end
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-- }}}
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-- Verbs {{{
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function BaseControl:has_verb(verb)
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return self.locals.verbs[verb] ~= nil or self.remotes.verbs[verb] ~= nil
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end
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function BaseControl:verbs(local_only)
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local verbs = {}
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for verb in pairs(self.locals.verbs) do
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table.insert(verbs, verb)
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end
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-- TODO: Remote
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return verbs
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end
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-- Setup connection and say hello
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self.modem.open(self.port)
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event.listen("modem_message", self._modem_listener)
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broadcast_msg(self, {ty=BC_MESSAGE.HELLO})
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local nouns, verbs = self:locals()
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broadcast_msg(self, {
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ty=BC_MESSAGE.REGISTER,
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nouns=nouns,
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verbs=verbs,
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})
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return self
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function BaseControl:call(verb, ...)
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error("call unimplemented")
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end
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-- }}}
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-- }}}
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return setmetatable(bc, {__call=new, __index={new=new}})
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return setmetatable(BaseControl, {__call=BaseControl.new})
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