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-- Prosody IM v0.4
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local log = require "util.logger".init("componentmanager");
local configmanager = require "core.configmanager";
local eventmanager = require "core.eventmanager";
local modulemanager = require "core.modulemanager";
local core_route_stanza = core_route_stanza;
local jid_split = require "util.jid".split;
local events_new = require "util.events".new;
local st = require "util.stanza";
local hosts = hosts;
local pairs, type, tostring = pairs, type, tostring;
local components = {};
local disco_items = require "util.multitable".new();
local NULL = {};
require "core.discomanager".addDiscoItemsHandler("*host", function(reply, to, from, node)
if #node == 0 and hosts[to] then
for jid in pairs(disco_items:get(to) or NULL) do
reply:tag("item", {jid = jid}):up();
end
return true;
end
end);
require "core.eventmanager".add_event_hook("server-starting", function () core_route_stanza = _G.core_route_stanza; end);
module "componentmanager"
local function default_component_handler(origin, stanza)
log("warn", "Stanza being handled by default component, bouncing error");
if stanza.attr.type ~= "error" then
core_route_stanza(nil, st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable"));
end
end
local components_loaded_once;
function load_enabled_components(config)
local defined_hosts = config or configmanager.getconfig();
for host, host_config in pairs(defined_hosts) do
if host ~= "*" and ((host_config.core.enabled == nil or host_config.core.enabled) and type(host_config.core.component_module) == "string") then
hosts[host] = { type = "component", host = host, connected = false, s2sout = {}, events = events_new() };
components[host] = default_component_handler;
local ok, err = modulemanager.load(host, host_config.core.component_module);
if not ok then
log("error", "Error loading %s component %s: %s", tostring(host_config.core.component_module), tostring(host), tostring(err));
else
log("debug", "Activated %s component: %s", host_config.core.component_module, host);
end
end
end
end
eventmanager.add_event_hook("server-starting", load_enabled_components);
function handle_stanza(origin, stanza)
local node, host = jid_split(stanza.attr.to);
local component = nil;
if host then
if node then component = components[node.."@"..host]; end -- hack to allow hooking node@server
if not component then component = components[host]; end
end
if component then
log("debug", "%s stanza being handled by component: %s", stanza.name, host);
component(origin, stanza, hosts[host]);
else
log("error", "Component manager recieved a stanza for a non-existing component: " .. stanza.attr.to);
end
end
function create_component(host, component)
-- TODO check for host well-formedness
return { type = "component", host = host, connected = true, s2sout = {}, events = events_new() };
end
function register_component(host, component, session)
if not hosts[host] or (hosts[host].type == 'component' and not hosts[host].connected) then
local old_events = hosts[host] and hosts[host].events;
components[host] = component;
hosts[host] = session or create_component(host, component);
-- Add events object if not already one
if not hosts[host].events then
hosts[host].events = old_events or events_new();
end
-- add to disco_items
if not(host:find("@", 1, true) or host:find("/", 1, true)) and host:find(".", 1, true) then
disco_items:set(host:sub(host:find(".", 1, true)+1), host, true);
end
-- FIXME only load for a.b.c if b.c has dialback, and/or check in config
modulemanager.load(host, "dialback");
log("debug", "component added: "..host);
return session or hosts[host];
else
log("error", "Attempt to set component for existing host: "..host);
end
end
function deregister_component(host)
if components[host] then
modulemanager.unload(host, "dialback");
hosts[host].connected = nil;
local host_config = configmanager.getconfig()[host];
if host_config and ((host_config.core.enabled == nil or host_config.core.enabled) and type(host_config.core.component_module) == "string") then
-- Set default handler
components[host] = default_component_handler;
else
-- Component not in config, or disabled, remove
hosts[host] = nil;
components[host] = nil;
end
-- remove from disco_items
if not(host:find("@", 1, true) or host:find("/", 1, true)) and host:find(".", 1, true) then
disco_items:remove(host:sub(host:find(".", 1, true)+1), host);
end
log("debug", "component removed: "..host);
return true;
else
log("error", "Attempt to remove component for non-existing host: "..host);
end
end
function set_component_handler(host, handler)
components[host] = handler;
end
return _M;
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