2 -- Copyright (C) 2008 Matthew Wild
3 -- Copyright (C) 2008 Waqas Hussain
5 -- This program is free software; you can redistribute it and/or
6 -- modify it under the terms of the GNU General Public License
7 -- as published by the Free Software Foundation; either version 2
8 -- of the License, or (at your option) any later version.
10 -- This program is distributed in the hope that it will be useful,
11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 -- GNU General Public License for more details.
15 -- You should have received a copy of the GNU General Public License
16 -- along with this program; if not, write to the Free Software
17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 local plugin_dir = CFG_PLUGINDIR or "./plugins/";
24 local logger = require "util.logger";
25 local log = logger.init("modulemanager");
26 local addDiscoInfoHandler = require "core.discomanager".addDiscoInfoHandler;
27 local eventmanager = require "core.eventmanager";
28 local config = require "core.configmanager";
29 local multitable_new = require "util.multitable".new;
32 local loadfile, pcall = loadfile, pcall;
33 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
34 local pairs, ipairs = pairs, ipairs;
35 local t_insert = table.insert;
38 local tostring, print = tostring, print;
40 -- We need this to let modules access the real global namespace
43 module "modulemanager"
45 local api = {}; -- Module API container
47 local modulemap = { ["*"] = {} };
49 local m_handler_info = multitable_new();
50 local m_stanza_handlers = multitable_new();
51 local handler_info = {};
52 local stanza_handlers = {};
54 local modulehelpers = setmetatable({}, { __index = _G });
56 -- Load modules when a host is activated
57 function load_modules_for_host(host)
58 local modules_enabled = config.get(host, "core", "modules_enabled");
59 if modules_enabled then
60 for _, module in pairs(modules_enabled) do
65 eventmanager.add_event_hook("host-activated", load_modules_for_host);
68 function load(host, module_name, config)
69 if not (host and module_name) then
70 return nil, "insufficient-parameters";
73 if not modulemap[host] then
75 stanza_handlers[host] = {};
76 elseif modulemap[host][module_name] then
77 log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
78 return nil, "module-already-loaded";
79 elseif modulemap["*"][module_name] then
80 return nil, "global-module-already-loaded";
84 local mod, err = loadfile(plugin_dir.."mod_"..module_name..".lua");
86 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
90 local _log = logger.init(host..":"..module_name);
91 local api_instance = setmetatable({ name = module_name, host = host, config = config, _log = _log, log = function (self, ...) return _log(...); end }, { __index = api });
93 local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
95 setfenv(mod, pluginenv);
97 local success, ret = pcall(mod);
99 log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil");
103 -- Use modified host, if the module set one
104 modulemap[api_instance.host][module_name] = mod;
109 function is_loaded(host, name)
110 return modulemap[host] and modulemap[host][name] and true;
113 function unload(host, name, ...)
114 local mod = modulemap[host] and modulemap[host][name];
115 if not mod then return nil, "module-not-loaded"; end
117 if type(mod.unload) == "function" then
118 local ok, err = pcall(mod.unload, ...)
119 if (not ok) and err then
120 log("warn", "Non-fatal error unloading module '%s' from '%s': %s", name, host, err);
126 function _handle_stanza(host, origin, stanza)
127 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
129 local handlers = stanza_handlers[host];
131 log("warn", "No handlers for %s", host);
135 if name == "iq" and xmlns == "jabber:client" and handlers[origin_type] then
136 local child = stanza.tags[1];
138 local xmlns = child.attr.xmlns or xmlns;
139 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
140 local handler = handlers[origin_type][name] and handlers[origin_type][name][xmlns];
142 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
143 return handler(origin, stanza) or true;
146 elseif handlers[origin_type] then
147 local handler = handlers[origin_type][name];
149 handler = handler[xmlns];
151 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
152 return handler(origin, stanza) or true;
156 log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns);
157 return false; -- we didn't handle it
159 function handle_stanza(host, origin, stanza)
160 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
161 if name == "iq" and xmlns == "jabber:client" then
162 xmlns = stanza.tags[1].attr.xmlns;
163 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
165 local handlers = m_stanza_handlers:get(host, origin_type, name, xmlns);
167 log("debug", "Passing stanza to mod_%s", handler_info[handlers[1]].name);
168 (handlers[1])(origin, stanza);
171 log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns); -- we didn't handle it
175 ----- API functions exposed to modules -----------
176 -- Must all be in api.*
178 -- Returns the name of the current module
179 function api:get_name()
183 -- Returns the host that the current module is serving
184 function api:get_host()
189 local function __add_iq_handler(module, origin_type, xmlns, handler)
190 local handlers = stanza_handlers[module.host];
191 handlers[origin_type] = handlers[origin_type] or {};
192 handlers[origin_type].iq = handlers[origin_type].iq or {};
193 if not handlers[origin_type].iq[xmlns] then
194 handlers[origin_type].iq[xmlns]= handler;
195 handler_info[handler] = module;
196 module:log("debug", "I now handle tag 'iq' [%s] with payload namespace '%s'", origin_type, xmlns);
198 module:log("warn", "I wanted to handle tag 'iq' [%s] with payload namespace '%s' but mod_%s already handles that", origin_type, xmlns, handler_info[handlers[origin_type].iq[xmlns]].name);
201 local function _add_iq_handler(module, origin_type, xmlns, handler)
202 local handlers = m_stanza_handlers:get(module.host, origin_type, "iq", xmlns);
204 m_stanza_handlers:add(module.host, origin_type, "iq", xmlns, handler);
205 handler_info[handler] = module;
206 module:log("debug", "I now handle tag 'iq' [%s] with payload namespace '%s'", origin_type, xmlns);
208 module:log("warn", "I wanted to handle tag 'iq' [%s] with payload namespace '%s' but mod_%s already handles that", origin_type, xmlns, handler_info[handlers[1]].name);
212 function api:add_iq_handler(origin_type, xmlns, handler)
213 if not (origin_type and handler and xmlns) then return false; end
214 if type(origin_type) == "table" then
215 for _, origin_type in ipairs(origin_type) do
216 _add_iq_handler(self, origin_type, xmlns, handler);
220 _add_iq_handler(self, origin_type, xmlns, handler);
223 function api:add_feature(xmlns)
224 addDiscoInfoHandler(self.host, function(reply, to, from, node)
226 reply:tag("feature", {var = xmlns}):up();
232 function api:add_event_hook (...) return eventmanager.add_event_hook(...); end
234 local function __add_handler(module, origin_type, tag, xmlns, handler)
235 local handlers = stanza_handlers[module.host];
236 handlers[origin_type] = handlers[origin_type] or {};
237 if not handlers[origin_type][tag] then
238 handlers[origin_type][tag] = handlers[origin_type][tag] or {};
239 handlers[origin_type][tag][xmlns]= handler;
240 handler_info[handler] = module;
241 module:log("debug", "I now handle tag '%s' [%s] with xmlns '%s'", tag, origin_type, xmlns);
242 elseif handler_info[handlers[origin_type][tag]] then
243 log("warning", "I wanted to handle tag '%s' [%s] but mod_%s already handles that", tag, origin_type, handler_info[handlers[origin_type][tag]].module.name);
246 local function _add_handler(module, origin_type, tag, xmlns, handler)
247 local handlers = m_stanza_handlers:get(module.host, origin_type, tag, xmlns);
249 m_stanza_handlers:add(module.host, origin_type, tag, xmlns, handler);
250 handler_info[handler] = module;
251 module:log("debug", "I now handle tag '%s' [%s] with xmlns '%s'", tag, origin_type, xmlns);
253 module:log("warning", "I wanted to handle tag '%s' [%s] but mod_%s already handles that", tag, origin_type, handler_info[handlers[1]].module.name);
257 function api:add_handler(origin_type, tag, xmlns, handler)
258 if not (origin_type and tag and xmlns and handler) then return false; end
259 if type(origin_type) == "table" then
260 for _, origin_type in ipairs(origin_type) do
261 _add_handler(self, origin_type, tag, xmlns, handler);
265 _add_handler(self, origin_type, tag, xmlns, handler);
268 --------------------------------------------------------------------