view mod_muc_dicebot/mod_muc_dicebot.lua @ 5406:b86d80e21c60

mod_http_oauth2: Validate consistency of response and grant types Ensure that these correlated fields make sense per RFC 7591 § 2.1, even though we currently only check the response type during authorization. This could probably all be deleted if (when!) we remove the implicit grant, since then these things don't make any sense anymore.
author Kim Alvefur <zash@zash.se>
date Tue, 02 May 2023 16:34:31 +0200
parents 785389a2d2b3
children
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local muc = module:depends("muc");
local rand = require"util.random";

local s_match = string.match;
local s_gmatch = string.gmatch;
local t_insert = table.insert;
local t_concat = table.concat;

local rooms = module:get_option_set("muc_dicebot_rooms", nil);
local xmlns_nick = "http://jabber.org/protocol/nick";

local function is_room_affected(roomjid)
	return not rooms or rooms:contains(roomjid)
end

local function roll(sides)
	if sides > 256 then
		return nil, "too many sides"
	end
	local factor = math.floor(256 / sides);
	local cutoff = sides * factor;
	module:log("error", "%d -> %d %d %d", sides, max, factor, cutoff);
	for i=1,10 do
		local randomness = string.byte(rand.bytes(1), 1);
		module:log("error", "%d", randomness);
		if randomness < cutoff then
			return (randomness % sides) + 1
		end
	end
	return nil, "failed to find valid number"
end

local function muc_broadcast_message(event)
	if not is_room_affected(event.room.jid) then
		return
	end

	local stanza = event.stanza;
	local body = stanza:get_child("body");
	if not body then
		return
	end

	local text = body:get_text();
	module:log("error", "%q %q %q", stanza, body, text);
	local dice = s_match(text, "^[%.!]r%s(.+)$");
	if not dice or dice == "" then
		return
	end

	local results = {};
	local count = 0;
	local sum = 0;
	for ndice, sep, sides in s_gmatch(dice, "(%d*)([wd]?)(%d+)") do
		if not sep or sep == "" then
			sides = ndice .. sides
			ndice = "1"
		end
		local ndice = tonumber(ndice);
		count = count + ndice;
		if count > 100 then
			return true
		end
		local sides = tonumber(sides);
		for i=1,ndice do
			local value = roll(sides);
			t_insert(results, tostring(value));
			sum = sum + value;
		end
	end
	body:text("\n⇒ "..t_concat(results, " ").." (sum: "..sum..")");
end

module:hook("muc-broadcast-message", muc_broadcast_message);