mirror of
https://github.com/osmarks/random-stuff
synced 2024-11-08 13:39:53 +00:00
243 lines
6.5 KiB
Lua
243 lines
6.5 KiB
Lua
local channel = 31415
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local m = peripheral.find("modem", function(_, o) return o.isWireless() end)
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if not m then error "Modem required!" end
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local tele = peripheral.find "Teleporter"
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if not tele then error "Teleporter (see Mekanism wiki) required!" end
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local sign = peripheral.find "minecraft:sign"
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local rift_ID = os.getComputerLabel():match "Rift:([A-Za-z0-9_-]+)"
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if not rift_ID then error "Please relabel this computer `Rift:[unique rift identifier]`." end
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m.open(channel)
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local function display_status(...)
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if sign then sign.setSignText(rift_ID, ...) end
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end
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local function split_at_spaces(s)
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local t = {}
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for i in string.gmatch(s, "%S+") do
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table.insert(t, i)
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end
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return t
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end
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local function first_letter(s)
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return string.sub(s, 1, 1)
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end
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local function update_self()
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print "Downloading update."
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local h = http.get "https://pastebin.com/raw/jta5puZL"
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local t = h.readAll()
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h.close()
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local fn, err = load(t, "@rift")
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if not fn then printError("Not updating: syntax error:\n" .. err) end
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local f = fs.open("startup", "w")
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f.write(t)
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f.close()
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os.reboot()
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end
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local teleporter_errors = {
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[2] = "Frame invalid.",
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[3] = "Pairing error.",
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[4] = "Insufficient energy."
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}
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local function send_message(...)
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m.transmit(channel, channel, { ... })
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end
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local function disconnect(remote)
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display_status "Idle"
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if not remote then send_message("command", "handle_disconnect", rift_ID) end
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tele.setFrequency(("rift-%s-null"):format(rift_ID), true)
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end
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local connected_to = nil
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local remote_commands = {
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ping = function()
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return { rift_ID }
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end,
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update = function()
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update_self()
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end,
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dial = function(from, to)
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if to ~= rift_ID then return end
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if type(from) ~= "string" then error("Invalid or no originator specified!") end
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local freq = ("rift-%s-%s"):format(from, to)
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tele.setFrequency(freq, true)
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local status = tele.canTeleport()
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if status == 1 then
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print(("Connection established from %s."):format(from))
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display_status("Dialed from:", from)
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connected_to = from
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return { true }
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else
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local e = teleporter_errors[status] or "Unknown error."
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display_status("Error:", e)
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printError(("Error receiving connection from %s: %s"):format(from, e))
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return { false, e }
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end
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end,
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handle_disconnect = function(other_end)
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if other_end == connected_to then disconnect(true) end
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end
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}
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local function timeout(fn, time)
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local timer = os.startTimer(time)
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local co = coroutine.create(fn)
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local filter
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while true do
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local ev = { os.pullEvent() }
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if coroutine.status(co) == "dead" or ev[1] == "timer" and ev[2] == timer then return end
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if not filter or filter == ev[1] then
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local ok, res = coroutine.resume(co, unpack(ev))
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if not ok then error(res)
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else filter = res end
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end
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end
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end
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local usage =
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[[Welcome to Rift. All listed commands are accessible by single-letter shortcuts.
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dial [destination] - Open a connection to rift [destination].
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scan - Scan for available rifts.
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scan [filter] - Scan for available rifts whose names contain [filter].
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help - Print this.
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update - Update this.
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disconnect - Disconnect from current paired rift.
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id - Get the ID of the current rift.]]
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local CLI_commands = {
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help = function() textutils.pagedPrint(usage) end,
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dial = function(dest)
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if not dest then error "No destination rift specified." end
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local freq = ("rift-%s-%s"):format(rift_ID, dest)
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print(("Setting frequency to %s."):format(freq))
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tele.setFrequency(freq, true)
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print(("Sending dial request to %s."):format(dest))
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send_message("command", "dial", rift_ID, dest)
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local result
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timeout(function()
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while true do
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local _, response_to, success, error_type = os.pullEvent "remote_result"
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if response_to == "dial" then
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if not success then
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print(dest, "reports error:", error_type)
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result = "remote_error"
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else
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print(dest, "reports success.")
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local status = tele.canTeleport()
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if status == 1 then
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result = "success"
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print "Link established."
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display_status("Dialed to:", dest)
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connected_to = dest
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else
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result = "local_error"
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local e = teleporter_errors[status] or "Unknown error."
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display_status("Error:", e)
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print(e)
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end
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end
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break
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end
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end
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end, 1)
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if result == nil then error(dest .. " is unreachable or nonexistent.", 0) end
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end,
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update = function(what)
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if what == "all" then
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send_message("command", "update")
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print "Update command broadcast"
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end
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update_self()
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end,
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scan = function(filter)
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send_message("command", "ping")
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print "Scanning..."
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timeout(function()
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while true do
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local _, resp_to, from = os.pullEvent "remote_result"
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if resp_to == "ping" and from and (not filter or from:match(filter)) then
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print("Found:", from)
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end
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end
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end, 1)
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end,
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disconnect = disconnect,
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id = function()
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print("Rift ID:", rift_ID)
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end
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}
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local function command_prompt()
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print "Welcome to Rift!"
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local history = {}
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while true do
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write "|> "
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local text = read(nil, history)
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if text ~= "" then table.insert(history, text) end
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local tokens = split_at_spaces(text)
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local command = table.remove(tokens, 1)
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local args = tokens
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local fn = CLI_commands[command]
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if not fn then
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for command_name, func in pairs(CLI_commands) do
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if command and first_letter(command_name) == first_letter(command) then fn = func end
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end
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end
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if not fn then
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print("Command", command, "not found.")
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else
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local ok, err = pcall(fn, table.unpack(args))
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if not ok then printError(err) end
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end
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end
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end
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local function message_handler()
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while true do
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local _, _, _, _, message = os.pullEvent "modem_message"
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if type(message) == "table" then
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local mtype = table.remove(message, 1)
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if mtype == "command" then
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local cmd = table.remove(message, 1)
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local cmd_fn = remote_commands[cmd]
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if cmd_fn then
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local ok, res = pcall(cmd_fn, unpack(message))
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if ok then
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if type(res) == "table" then
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send_message("result", cmd, unpack(res))
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end
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else
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printError(res)
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send_message("error", res)
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end
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end
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elseif mtype == "result" then os.queueEvent("remote_result", unpack(message))
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elseif mtype == "error" then os.queueEvent("remote_error", unpack(message)) end
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end
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end
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end
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if ... == "update" then update_self() end
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disconnect()
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parallel.waitForAny(message_handler, command_prompt) |