MUC: Changed a MUC library method into a function.
[prosody.git] / core / componentmanager.lua
index 18bf5c02a6a5e2017a0793185f688632c00add83..536d16339e247c539c74978743476d08b29e4e37 100644 (file)
-\r
-\r
-local log = require "util.logger".init("componentmanager")\r
-local jid_split = require "util.jid".split;\r
-local hosts = hosts;\r
-\r
-local components = {};\r
-\r
-module "componentmanager"\r
-\r
-function handle_stanza(origin, stanza)\r
-       local node, host = jid_split(stanza.attr.to);\r
-       local component = components[host];\r
-       if not component then component = components[node.."@"..host]; end -- hack to allow hooking node@server\r
-       if not component then component = components[stanza.attr.to]; end -- hack to allow hooking node@server/resource and server/resource\r
-       if component then\r
-               log("debug", "stanza being handled by component: "..host);\r
-               component(origin, stanza);\r
-       else\r
-               log("error", "Component manager recieved a stanza for a non-existing component: " .. stanza.attr.to);\r
-       end\r
-end\r
-\r
-function register_component(host, component)\r
-       if not hosts[host] then\r
-               -- TODO check for host well-formedness\r
-               components[host] = component;\r
-               hosts[host] = {type = "component", connected = true};\r
-               log("debug", "component added: "..host);\r
-       else\r
-               log("error", "Attempt to set component for existing host: "..host);\r
-       end\r
-end\r
-\r
-return _M;
\ No newline at end of file
+-- Prosody IM
+-- 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 prosody = prosody;
+local log = require "util.logger".init("componentmanager");
+local configmanager = require "core.configmanager";
+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 serialize = require "util.serialization".serialize
+
+local pairs, type, tostring = pairs, type, tostring;
+
+local components = {};
+
+local disco_items = require "util.multitable".new();
+local NULL = {};
+
+prosody.events.add_handler("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
+
+prosody.events.add_handler("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 or serialize(stanza)));
+       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
+
+function get_children(host)
+       return disco_items:get(host) or NULL;
+end
+
+return _M;