jiti-meet/resources/prosody-plugins/util.lib.lua

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local jid = require "util.jid";
local runner, waiter = require "util.async".runner, require "util.async".waiter;
local muc_domain_prefix
= module:get_option_string("muc_mapper_domain_prefix", "conference");
-- defaults to module.host, the module that uses the utility
local muc_domain_base
= module:get_option_string("muc_mapper_domain_base", module.host);
-- The "real" MUC domain that we are proxying to
local muc_domain = module:get_option_string(
"muc_mapper_domain", muc_domain_prefix.."."..muc_domain_base);
local escaped_muc_domain_base = muc_domain_base:gsub("%p", "%%%1");
local escaped_muc_domain_prefix = muc_domain_prefix:gsub("%p", "%%%1");
-- The pattern used to extract the target subdomain
-- (e.g. extract 'foo' from 'foo.muc.example.com')
local target_subdomain_pattern
= "^"..escaped_muc_domain_prefix..".([^%.]+)%."..escaped_muc_domain_base;
--- Utility function to check and convert a room JID from
-- virtual room1@muc.foo.example.com to real [foo]room1@muc.example.com
-- @param room_jid the room jid to match and rewrite if needed
-- @return returns room jid [foo]room1@muc.example.com when it has subdomain
-- otherwise room1@muc.example.com(the room_jid value untouched)
local function room_jid_match_rewrite(room_jid)
local node, host, resource = jid.split(room_jid);
local target_subdomain = host and host:match(target_subdomain_pattern);
if not target_subdomain then
module:log("debug", "No need to rewrite out 'to' %s", room_jid);
return room_jid;
end
-- Ok, rewrite room_jid address to new format
local new_node, new_host, new_resource
= "["..target_subdomain.."]"..node, muc_domain, resource;
room_jid = jid.join(new_node, new_host, new_resource);
module:log("debug", "Rewrote to %s", room_jid);
return room_jid
end
--- Finds and returns room by its jid
-- @param room_jid the room jid to search in the muc component
-- @return returns room if found or nil
function get_room_from_jid(room_jid)
local _, host = jid.split(room_jid);
local component = hosts[host];
if component then
local muc = component.modules.muc
if muc and rawget(muc,"rooms") then
-- We're running 0.9.x or 0.10 (old MUC API)
return muc.rooms[room_jid];
elseif muc and rawget(muc,"get_room_from_jid") then
-- We're running >0.10 (new MUC API)
return muc.get_room_from_jid(room_jid);
else
return
end
end
end
function wrap_async_run(event,handler)
local result;
local async_func = runner(function (event)
local wait, done = waiter();
result=handler(event);
done();
return result;
end)
async_func:run(event)
return result;
end
--- Updates presence stanza, by adding identity node
-- @param stanza the presence stanza
-- @param user the user to which presence we are updating identity
-- @param group the group of the user to which presence we are updating identity
-- @param creator_user the user who created the user which presence we
-- are updating (this is the poltergeist case, where a user creates
-- a poltergeist), optional.
-- @param creator_group the group of the user who created the user which
-- presence we are updating (this is the poltergeist case, where a user creates
-- a poltergeist), optional.
function update_presence_identity(
stanza, user, group, creator_user, creator_group)
-- First remove any 'identity' element if it already
-- exists, so it cannot be spoofed by a client
stanza:maptags(
function(tag)
for k, v in pairs(tag) do
if k == "name" and v == "identity" then
return nil
end
end
return tag
end
)
module:log("debug",
"Presence after previous identity stripped: %s", tostring(stanza));
stanza:tag("identity"):tag("user");
for k, v in pairs(user) do
stanza:tag(k):text(v):up();
end
stanza:up();
-- Add the group information if it is present
if group then
stanza:tag("group"):text(group):up();
end
-- Add the creator user information if it is present
if creator_user then
stanza:tag("creator_user");
for k, v in pairs(creator_user) do
stanza:tag(k):text(v):up();
end
stanza:up();
-- Add the creator group information if it is present
if creator_group then
stanza:tag("creator_group"):text(creator_group):up();
end
stanza:up();
end
module:log("debug",
"Presence with identity inserted %s", tostring(stanza))
end
return {
get_room_from_jid = get_room_from_jid;
wrap_async_run = wrap_async_run;
room_jid_match_rewrite = room_jid_match_rewrite;
update_presence_identity = update_presence_identity;
};