2 -- Copyright (C) 2008-2009 Matthew Wild
3 -- Copyright (C) 2008-2009 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
11 local plugin_dir = CFG_PLUGINDIR or "./plugins/";
13 local logger = require "util.logger";
14 local log = logger.init("modulemanager");
15 local addDiscoInfoHandler = require "core.discomanager".addDiscoInfoHandler;
16 local eventmanager = require "core.eventmanager";
17 local config = require "core.configmanager";
18 local multitable_new = require "util.multitable".new;
19 local register_actions = require "core.actions".register;
20 local st = require "util.stanza";
23 local prosody = prosody;
25 local loadfile, pcall = loadfile, pcall;
26 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
27 local pairs, ipairs = pairs, ipairs;
28 local t_insert, t_concat = table.insert, table.concat;
31 local rawget = rawget;
33 local tostring = tostring;
35 -- We need this to let modules access the real global namespace
38 module "modulemanager"
40 local api = {}; -- Module API container
42 local modulemap = { ["*"] = {} };
44 local stanza_handlers = multitable_new();
45 local handler_info = {};
47 local modulehelpers = setmetatable({}, { __index = _G });
49 local features_table = multitable_new();
50 local identities_table = multitable_new();
51 local handler_table = multitable_new();
52 local hooked = multitable_new();
53 local hooks = multitable_new();
54 local event_hooks = multitable_new();
58 -- Load modules when a host is activated
59 function load_modules_for_host(host)
60 if config.get(host, "core", "modules_enable") == false then
61 return; -- Only load for hosts, not components, etc.
64 -- Load modules from global section
65 local modules_enabled = config.get("*", "core", "modules_enabled");
66 local modules_disabled = config.get(host, "core", "modules_disabled");
67 local disabled_set = {};
68 if modules_enabled then
69 if modules_disabled then
70 for _, module in ipairs(modules_disabled) do
71 disabled_set[module] = true;
74 for _, module in ipairs({"presence", "message", "iq"}) do
75 if not disabled_set[module] then
79 for _, module in ipairs(modules_enabled) do
80 if not disabled_set[module] and not is_loaded(host, module) then
86 -- Load modules from just this host
87 local modules_enabled = config.get(host, "core", "modules_enabled");
88 if modules_enabled then
89 for _, module in pairs(modules_enabled) do
90 if not is_loaded(host, module) then
96 eventmanager.add_event_hook("host-activated", load_modules_for_host);
99 function load(host, module_name, config)
100 if not (host and module_name) then
101 return nil, "insufficient-parameters";
104 if not modulemap[host] then
105 modulemap[host] = {};
108 if modulemap[host][module_name] then
109 log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
110 return nil, "module-already-loaded";
111 elseif modulemap["*"][module_name] then
112 return nil, "global-module-already-loaded";
116 local mod, err = loadfile(get_module_filename(module_name));
118 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
122 local _log = logger.init(host..":"..module_name);
123 local api_instance = setmetatable({ name = module_name, host = host, config = config, _log = _log, log = function (self, ...) return _log(...); end }, { __index = api });
125 local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
127 setfenv(mod, pluginenv);
128 if not hosts[host] then hosts[host] = { type = "component", host = host, connected = false, s2sout = {} }; end
130 local success, ret = pcall(mod);
132 log("error", "Error initialising module '%s': %s", module_name or "nil", ret or "nil");
136 -- Use modified host, if the module set one
137 modulemap[api_instance.host][module_name] = pluginenv;
139 if api_instance.host == "*" and host ~= "*" then
140 api_instance:set_global();
146 function get_module(host, name)
147 return modulemap[host] and modulemap[host][name];
150 function is_loaded(host, name)
151 return modulemap[host] and modulemap[host][name] and true;
154 function unload(host, name, ...)
155 local mod = get_module(host, name);
156 if not mod then return nil, "module-not-loaded"; end
158 if module_has_method(mod, "unload") then
159 local ok, err = call_module_method(mod, "unload");
160 if (not ok) and err then
161 log("warn", "Non-fatal error unloading module '%s' on '%s': %s", name, host, err);
164 modulemap[host][name] = nil;
165 features_table:remove(host, name);
166 identities_table:remove(host, name);
167 local params = handler_table:get(host, name); -- , {module.host, origin_type, tag, xmlns}
168 for _, param in pairs(params or NULL) do
169 local handlers = stanza_handlers:get(param[1], param[2], param[3], param[4]);
171 handler_info[handlers[1]] = nil;
172 stanza_handlers:remove(param[1], param[2], param[3], param[4]);
175 event_hooks:remove(host, name);
176 -- unhook event handlers hooked by module:hook
177 for event, handlers in pairs(hooks:get(host, name) or NULL) do
178 for handler in pairs(handlers or NULL) do
179 (hosts[host] or prosody).events.remove_handler(event, handler);
182 hooks:remove(host, name);
186 function reload(host, name, ...)
187 local mod = get_module(host, name);
188 if not mod then return nil, "module-not-loaded"; end
190 local _mod, err = loadfile(get_module_filename(name)); -- checking for syntax errors
192 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
198 if module_has_method(mod, "save") then
199 local ok, ret, err = call_module_method(mod, "save");
203 log("warn", "Error saving module '%s:%s' state: %s", host, module, ret);
204 if not config.get(host, "core", "force_module_reload") then
205 log("warn", "Aborting reload due to error, set force_module_reload to ignore this");
206 return nil, "save-state-failed";
208 log("warn", "Continuing with reload (using the force)");
213 unload(host, name, ...);
214 local ok, err = load(host, name, ...);
216 mod = get_module(host, name);
217 if module_has_method(mod, "restore") then
218 local ok, err = call_module_method(mod, "restore", saved or {})
219 if (not ok) and err then
220 log("warn", "Error restoring module '%s' from '%s': %s", name, host, err);
228 function handle_stanza(host, origin, stanza)
229 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
230 if name == "iq" and xmlns == "jabber:client" then
231 if stanza.attr.type == "get" or stanza.attr.type == "set" then
232 xmlns = stanza.tags[1].attr.xmlns or "jabber:client";
233 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
235 log("debug", "Discarding %s from %s of type: %s", name, origin_type, stanza.attr.type);
239 local handlers = stanza_handlers:get(host, origin_type, name, xmlns);
240 if not handlers then handlers = stanza_handlers:get("*", origin_type, name, xmlns); end
242 log("debug", "Passing stanza to mod_%s", handler_info[handlers[1]].name);
243 (handlers[1])(origin, stanza);
246 log("debug", "Unhandled %s stanza: %s; xmlns=%s", origin.type, stanza.name, xmlns); -- we didn't handle it
247 if stanza.attr.xmlns == "jabber:client" then
248 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
249 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
251 elseif not(name == "features" and xmlns == "http://etherx.jabber.org/streams") then -- FIXME remove check once we handle S2S features
252 origin:close("unsupported-stanza-type");
257 function module_has_method(module, method)
258 return type(module.module[method]) == "function";
261 function call_module_method(module, method, ...)
262 if module_has_method(module, method) then
263 local f = module.module[method];
264 return pcall(f, ...);
266 return false, "no-such-method";
270 local _modulepath = { plugin_dir, "mod_", nil, ".lua"};
271 function get_module_filename(name)
272 _modulepath[3] = name;
273 return t_concat(_modulepath);
276 ----- API functions exposed to modules -----------
277 -- Must all be in api.*
279 -- Returns the name of the current module
280 function api:get_name()
284 -- Returns the host that the current module is serving
285 function api:get_host()
289 function api:get_host_type()
290 return hosts[self.host].type;
293 function api:set_global()
296 local _log = logger.init("mod_"..self.name);
297 self.log = function (self, ...) return _log(...); end;
301 local function _add_handler(module, origin_type, tag, xmlns, handler)
302 local handlers = stanza_handlers:get(module.host, origin_type, tag, xmlns);
303 local msg = (tag == "iq") and "namespace" or "payload namespace";
305 stanza_handlers:add(module.host, origin_type, tag, xmlns, handler);
306 handler_info[handler] = module;
307 handler_table:add(module.host, module.name, {module.host, origin_type, tag, xmlns});
308 --module:log("debug", "I now handle tag '%s' [%s] with %s '%s'", tag, origin_type, msg, xmlns);
310 module:log("warn", "I wanted to handle tag '%s' [%s] with %s '%s' but mod_%s already handles that", tag, origin_type, msg, xmlns, handler_info[handlers[1]].module.name);
314 function api:add_handler(origin_type, tag, xmlns, handler)
315 if not (origin_type and tag and xmlns and handler) then return false; end
316 if type(origin_type) == "table" then
317 for _, origin_type in ipairs(origin_type) do
318 _add_handler(self, origin_type, tag, xmlns, handler);
321 _add_handler(self, origin_type, tag, xmlns, handler);
324 function api:add_iq_handler(origin_type, xmlns, handler)
325 self:add_handler(origin_type, "iq", xmlns, handler);
328 addDiscoInfoHandler("*host", function(reply, to, from, node)
331 for module, identities in pairs(identities_table:get(to) or NULL) do -- for each module
332 for identity, attr in pairs(identities) do
333 if not done[identity] then
334 reply:tag("identity", attr):up(); -- TODO cache
335 done[identity] = true;
339 for module, identities in pairs(identities_table:get("*") or NULL) do -- for each module
340 for identity, attr in pairs(identities) do
341 if not done[identity] then
342 reply:tag("identity", attr):up(); -- TODO cache
343 done[identity] = true;
347 for module, features in pairs(features_table:get(to) or NULL) do -- for each module
348 for feature in pairs(features) do
349 if not done[feature] then
350 reply:tag("feature", {var = feature}):up(); -- TODO cache
351 done[feature] = true;
355 for module, features in pairs(features_table:get("*") or NULL) do -- for each module
356 for feature in pairs(features) do
357 if not done[feature] then
358 reply:tag("feature", {var = feature}):up(); -- TODO cache
359 done[feature] = true;
363 return next(done) ~= nil;
367 function api:add_feature(xmlns)
368 features_table:set(self.host, self.name, xmlns, true);
370 function api:add_identity(category, type)
371 identities_table:set(self.host, self.name, category.."\0"..type, {category = category, type = type});
374 local event_hook = function(host, mod_name, event_name, ...)
375 if type((...)) == "table" and (...).host and (...).host ~= host then return; end
376 for handler in pairs(event_hooks:get(host, mod_name, event_name) or NULL) do
380 function api:add_event_hook(name, handler)
381 if not hooked:get(self.host, self.name, name) then
382 eventmanager.add_event_hook(name, function(...) event_hook(self.host, self.name, name, ...); end);
383 hooked:set(self.host, self.name, name, true);
385 event_hooks:set(self.host, self.name, name, handler, true);
388 function api:fire_event(...)
389 return (hosts[self.host] or prosody).events.fire_event(...);
392 function api:hook(event, handler, priority)
393 hooks:set(self.host, self.name, event, handler, true);
394 (hosts[self.host] or prosody).events.add_handler(event, handler, priority);
397 function api:hook_stanza(xmlns, name, handler, priority)
398 if not handler and type(name) == "function" then
399 -- If only 2 options then they specified no xmlns
400 xmlns, name, handler, priority = nil, xmlns, name, handler;
401 elseif not (handler and name) then
402 self:log("warn", "Error: Insufficient parameters to module:hook_stanza()");
405 return api.hook(self, "stanza/"..(xmlns and (xmlns..":") or "")..name, function (data) return handler(data.origin, data.stanza, data); end, priority);
408 --------------------------------------------------------------------
412 function actions.load(params)
413 --return true, "Module loaded ("..params.module.." on "..params.host..")";
414 return load(params.host, params.module);
417 function actions.unload(params)
418 return unload(params.host, params.module);
421 register_actions("/modules", actions);