2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
9 local logger = require "util.logger";
10 local log = logger.init("modulemanager");
11 local config = require "core.configmanager";
12 local pluginloader = require "util.pluginloader";
13 local set = require "util.set";
15 local new_multitable = require "util.multitable".new;
16 local api = require "core.moduleapi"; -- Module API container
19 local prosody = prosody;
21 local xpcall = xpcall;
22 local setmetatable, rawget = setmetatable, rawget;
23 local ipairs, pairs, type, tostring, t_insert = ipairs, pairs, type, tostring, table.insert;
25 local debug_traceback = debug.traceback;
26 local unpack, select = unpack, select;
27 local pcall = function(f, ...)
28 local n = select("#", ...);
30 return xpcall(function() return f(unpack(params, 1, n)) end, function(e) return tostring(e).."\n"..debug_traceback(); end);
33 local autoload_modules = {prosody.platform, "presence", "message", "iq", "offline", "c2s", "s2s", "s2s_auth_certs"};
34 local component_inheritable_modules = {"tls", "saslauth", "dialback", "iq", "s2s"};
36 -- We need this to let modules access the real global namespace
41 local load_modules_for_host, load, unload, reload, get_module, get_items, get_modules, is_loaded, module_has_method, call_module_method;
43 -- [host] = { [module] = module_env }
44 local modulemap = { ["*"] = {} };
46 -- Load modules when a host is activated
47 function load_modules_for_host(host)
48 local component = config.get(host, "component_module");
50 local global_modules_enabled = config.get("*", "modules_enabled");
51 local global_modules_disabled = config.get("*", "modules_disabled");
52 local host_modules_enabled = config.get(host, "modules_enabled");
53 local host_modules_disabled = config.get(host, "modules_disabled");
55 if host_modules_enabled == global_modules_enabled then host_modules_enabled = nil; end
56 if host_modules_disabled == global_modules_disabled then host_modules_disabled = nil; end
58 local global_modules = set.new(autoload_modules) + set.new(global_modules_enabled) - set.new(global_modules_disabled);
60 global_modules = set.intersection(set.new(component_inheritable_modules), global_modules);
62 local modules = (global_modules + set.new(host_modules_enabled)) - set.new(host_modules_disabled);
65 if modules:contains("console") then
66 log("error", "The mod_console plugin has been renamed to mod_admin_telnet. Please update your config.");
67 modules:remove("console");
68 modules:add("admin_telnet");
72 load(host, component);
74 for module in modules do
78 prosody.events.add_handler("host-activated", load_modules_for_host);
79 prosody.events.add_handler("host-deactivated", function (host)
80 modulemap[host] = nil;
83 --- Private helpers ---
85 local function do_unload_module(host, name)
86 local mod = get_module(host, name);
87 if not mod then return nil, "module-not-loaded"; end
89 if module_has_method(mod, "unload") then
90 local ok, err = call_module_method(mod, "unload");
91 if (not ok) and err then
92 log("warn", "Non-fatal error unloading module '%s' on '%s': %s", name, host, err);
96 for object, event, handler in mod.module.event_handlers:iter(nil, nil, nil) do
97 object.remove_handler(event, handler);
100 if mod.module.items then -- remove items
101 local events = (host == "*" and prosody.events) or hosts[host].events;
102 for key,t in pairs(mod.module.items) do
106 events.fire_event("item-removed/"..key, {source = mod.module, item = value});
110 mod.module.loaded = false;
111 modulemap[host][name] = nil;
115 local function do_load_module(host, module_name, state)
116 if not (host and module_name) then
117 return nil, "insufficient-parameters";
118 elseif not hosts[host] and host ~= "*"then
119 return nil, "unknown-host";
122 if not modulemap[host] then
123 modulemap[host] = hosts[host].modules;
126 if modulemap[host][module_name] then
127 log("debug", "%s is already loaded for %s, so not loading again", module_name, host);
128 return nil, "module-already-loaded";
129 elseif modulemap["*"][module_name] then
130 local mod = modulemap["*"][module_name];
131 if module_has_method(mod, "add_host") then
132 local _log = logger.init(host..":"..module_name);
133 local host_module_api = setmetatable({
134 host = host, event_handlers = new_multitable(), items = {};
135 _log = _log, log = function (self, ...) return _log(...); end; --luacheck: ignore 212/self
137 __index = modulemap["*"][module_name].module;
139 local host_module = setmetatable({ module = host_module_api }, { __index = mod });
140 host_module_api.environment = host_module;
141 modulemap[host][module_name] = host_module;
142 local ok, result, module_err = call_module_method(mod, "add_host", host_module_api);
143 if not ok or result == false then
144 modulemap[host][module_name] = nil;
145 return nil, ok and module_err or result;
149 return nil, "global-module-already-loaded";
154 local _log = logger.init(host..":"..module_name);
155 local api_instance = setmetatable({ name = module_name, host = host,
156 _log = _log, log = function (self, ...) return _log(...); end, --luacheck: ignore 212/self
157 event_handlers = new_multitable(), reloading = not not state,
158 saved_state = state~=true and state or nil }
159 , { __index = api });
161 local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
162 api_instance.environment = pluginenv;
164 local mod, err = pluginloader.load_code(module_name, nil, pluginenv);
166 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
170 api_instance.path = err;
172 modulemap[host][module_name] = pluginenv;
173 local ok, err = pcall(mod);
175 -- Call module's "load"
176 if module_has_method(pluginenv, "load") then
177 ok, err = call_module_method(pluginenv, "load");
179 log("warn", "Error loading module '%s' on '%s': %s", module_name, host, err or "nil");
182 api_instance.reloading, api_instance.saved_state = nil, nil;
184 if api_instance.host == "*" then
185 if not api_instance.global then -- COMPAT w/pre-0.9
187 log("warn", "mod_%s: Setting module.host = '*' deprecated, call module:set_global() instead", module_name);
189 api_instance:set_global();
191 modulemap[host][module_name] = nil;
192 modulemap[api_instance.host][module_name] = pluginenv;
193 if host ~= api_instance.host and module_has_method(pluginenv, "add_host") then
194 -- Now load the module again onto the host it was originally being loaded on
195 ok, err = do_load_module(host, module_name);
200 modulemap[api_instance.host][module_name] = nil;
201 log("error", "Error initializing module '%s' on '%s': %s", module_name, host, err or "nil");
203 return ok and pluginenv, err;
206 local function do_reload_module(host, name)
207 local mod = get_module(host, name);
208 if not mod then return nil, "module-not-loaded"; end
210 local _mod, err = pluginloader.load_code(name); -- checking for syntax errors
212 log("error", "Unable to load module '%s': %s", name or "nil", err or "nil");
217 if module_has_method(mod, "save") then
218 local ok, ret, err = call_module_method(mod, "save");
222 log("warn", "Error saving module '%s:%s' state: %s", host, name, ret);
223 if not config.get(host, "force_module_reload") then
224 log("warn", "Aborting reload due to error, set force_module_reload to ignore this");
225 return nil, "save-state-failed";
227 log("warn", "Continuing with reload (using the force)");
232 mod.module.reloading = true;
233 do_unload_module(host, name);
234 local ok, err = do_load_module(host, name, saved or true);
236 mod = get_module(host, name);
237 if module_has_method(mod, "restore") then
238 local ok, err = call_module_method(mod, "restore", saved or {})
239 if (not ok) and err then
240 log("warn", "Error restoring module '%s' from '%s': %s", name, host, err);
244 return ok and mod, err;
249 -- Load a module and fire module-loaded event
250 function load(host, name)
251 local mod, err = do_load_module(host, name);
253 (hosts[mod.module.host] or prosody).events.fire_event("module-loaded", { module = name, host = mod.module.host });
258 -- Unload a module and fire module-unloaded
259 function unload(host, name)
260 local ok, err = do_unload_module(host, name);
262 (hosts[host] or prosody).events.fire_event("module-unloaded", { module = name, host = host });
267 function reload(host, name)
268 local mod, err = do_reload_module(host, name);
270 modulemap[host][name].module.reloading = true;
271 (hosts[host] or prosody).events.fire_event("module-reloaded", { module = name, host = host });
272 mod.module.reloading = nil;
273 elseif not is_loaded(host, name) then
274 (hosts[host] or prosody).events.fire_event("module-unloaded", { module = name, host = host });
279 function get_module(host, name)
280 return modulemap[host] and modulemap[host][name];
283 function get_items(key, host)
285 local modules = modulemap[host];
286 if not key or not host or not modules then return nil; end
288 for _, module in pairs(modules) do
289 local mod = module.module;
290 if mod.items and mod.items[key] then
291 for _, value in ipairs(mod.items[key]) do
292 t_insert(result, value);
300 function get_modules(host)
301 return modulemap[host];
304 function is_loaded(host, name)
305 return modulemap[host] and modulemap[host][name] and true;
308 function module_has_method(module, method)
309 return type(rawget(module.module, method)) == "function";
312 function call_module_method(module, method, ...)
313 local f = rawget(module.module, method);
314 if type(f) == "function" then
315 return pcall(f, ...);
317 return false, "no-such-method";
322 load_modules_for_host = load_modules_for_host;
326 get_module = get_module;
327 get_items = get_items;
328 get_modules = get_modules;
329 is_loaded = is_loaded;
330 module_has_method = module_has_method;
331 call_module_method = call_module_method;