view mod_muc_dicebot/mod_muc_dicebot.lua @ 4936:a85efae90e21

mod_rest: Expand mapping of XEP-0045 join stanza The previous 'join' mapping was apparently lost in translation when swithing to datamapper, so might as well map some properties allowing history control. Usually you probably want either zero history or history since the last known time of being joined. Maybe that the former should be the default?
author Kim Alvefur <zash@zash.se>
date Sat, 30 Apr 2022 01:00:01 +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);