view mod_carbons_copies/mod_carbons_copies.lua @ 4813:0a257d1402c3

mod_muc_rtbl: Optimize case with zero hashes On the assumption that during quiet times between torrents of spam, the hash set would be empty. There would be no point in doing the operations and hashes to check for a match in that case.
author Kim Alvefur <zash@zash.se>
date Mon, 06 Dec 2021 18:19:19 +0100
parents 7dbde05b48a9
children
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-- Send carbons v0 style copies of incoming messages to clients which
-- are not (yet) capable of Message Carbons (XEP-0280).
--
-- This extension integrates with the mod_carbons plugin in such a way
-- that a client capable of Message Carbons will not get a v0 copy.
--
-- This extension can be enabled for all users by default by setting
-- carbons_copies_default = true.
--
-- Alternatively or additionally setting carbons_copies_adhoc = true
-- will allow the user to enable or disable copies through Adhoc
-- commands.
--
-- Copyright (C) 2012 Michael Holzt
--
-- This file is MIT/X11 licensed.

local jid_split = require "util.jid".split;
local dm_load = require "util.datamanager".load;
local dm_store = require "util.datamanager".store;
local adhoc_new = module:require "adhoc".new;
local xmlns_carbons_v0 = "urn:xmpp:carbons:0";
local storename = "mod_carbons_copies";

local function toggle_copies(data, on)
	local username, hostname, resource = jid_split(data.from);
	dm_store(username, hostname, storename, { enabled = on });
end

local function adhoc_enable_copies(self, data, state)
	toggle_copies(data, true);
	return { info = "Copies are enabled for you now.\nPlease restart/reconnect clients.", status = "completed" };
end

local function adhoc_disable_copies(self, data, state)
	toggle_copies(data, false);
	return { info = "Copies are disabled for you now.\nPlease restart/reconnect clients.", status = "completed" };
end

module:hook("resource-bind", function(event)
	local session = event.session;
	local username, hostname, resource = jid_split(session.full_jid);

	local store = dm_load(username, hostname, storename) or
		{ enabled =
		module:get_option_boolean("carbons_copies_default") };

	if store.enabled then
		session.want_carbons = xmlns_carbons_v0;
		module:log("debug", "%s enabling copies", session.full_jid);
	end
end);

-- Adhoc-Support
if module:get_option_boolean("carbons_copies_adhoc") then
	local enable_desc = adhoc_new("Carbons: Enable Copies",
		"mod_carbons_copies#enable", adhoc_enable_copies);
	local disable_desc = adhoc_new("Carbons: Disable Copies",
		"mod_carbons_copies#disable", adhoc_disable_copies);

	module:add_item("adhoc", enable_desc);
	module:add_item("adhoc", disable_desc);
end