2 -- Copyright (C) 2008-2012 Matthew Wild
3 -- Copyright (C) 2008-2012 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
9 local config = require "core.configmanager";
10 local modulemanager = require "modulemanager";
11 local array = require "util.array";
12 local set = require "util.set";
13 local logger = require "util.logger";
14 local pluginloader = require "util.pluginloader";
16 local multitable_new = require "util.multitable".new;
18 local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
19 local error, setmetatable, setfenv, type = error, setmetatable, setfenv, type;
20 local ipairs, pairs, select, unpack = ipairs, pairs, select, unpack;
21 local tonumber, tostring = tonumber, tostring;
23 local prosody = prosody;
24 local hosts = prosody.hosts;
25 local core_post_stanza = prosody.core_post_stanza;
27 -- Registry of shared module data
28 local shared_data = setmetatable({}, { __mode = "v" });
34 -- Returns the name of the current module
35 function api:get_name()
39 -- Returns the host that the current module is serving
40 function api:get_host()
44 function api:get_host_type()
45 return hosts[self.host].type;
48 function api:set_global()
51 local _log = logger.init("mod_"..self.name);
52 self.log = function (self, ...) return _log(...); end;
57 function api:add_feature(xmlns)
58 self:add_item("feature", xmlns);
60 function api:add_identity(category, type, name)
61 self:add_item("identity", {category = category, type = type, name = name});
63 function api:add_extension(data)
64 self:add_item("extension", data);
67 function api:fire_event(...)
68 return (hosts[self.host] or prosody).events.fire_event(...);
71 function api:hook_object_event(object, event, handler, priority)
72 self.event_handlers[handler] = { name = event, priority = priority, object = object };
73 return object.add_handler(event, handler, priority);
76 function api:unhook_object_event(object, event, handler)
77 return object.remove_handler(event, handler);
80 function api:hook(event, handler, priority)
81 return self:hook_object_event((hosts[self.host] or prosody).events, event, handler, priority);
84 function api:hook_global(event, handler, priority)
85 return self:hook_object_event(prosody.events, event, handler, priority);
88 function api:hook_stanza(xmlns, name, handler, priority)
89 if not handler and type(name) == "function" then
90 -- If only 2 options then they specified no xmlns
91 xmlns, name, handler, priority = nil, xmlns, name, handler;
92 elseif not (handler and name) then
93 self:log("warn", "Error: Insufficient parameters to module:hook_stanza()");
96 return self:hook("stanza/"..(xmlns and (xmlns..":") or "")..name, function (data) return handler(data.origin, data.stanza, data); end, priority);
99 function api:require(lib)
100 local f, n = pluginloader.load_code(self.name, lib..".lib.lua");
102 f, n = pluginloader.load_code(lib, lib..".lib.lua");
104 if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message
105 setfenv(f, self.environment);
109 function api:depends(name)
110 if not self.dependencies then
111 self.dependencies = {};
112 self:hook("module-reloaded", function (event)
113 if self.dependencies[event.module] then
114 self:log("info", "Auto-reloading due to reload of %s:%s", event.host, event.module);
115 modulemanager.reload(self.host, self.name);
119 self:hook("module-unloaded", function (event)
120 if self.dependencies[event.module] then
121 self:log("info", "Auto-unloading due to unload of %s:%s", event.host, event.module);
122 modulemanager.unload(self.host, self.name);
126 local mod = modulemanager.get_module(self.host, name) or modulemanager.get_module("*", name);
127 if mod and mod.module.host == "*" and self.host ~= "*"
128 and modulemanager.module_has_method(mod, "add_host") then
129 mod = nil; -- This is a shared module, so we still want to load it on our host
133 mod, err = modulemanager.load(self.host, name);
135 return error(("Unable to load required module, mod_%s: %s"):format(name, ((err or "unknown error"):gsub("%-", " ")) ));
138 self.dependencies[name] = true;
142 -- Returns one or more shared tables at the specified virtual paths
143 -- Intentionally does not allow the table at a path to be _set_, it
144 -- is auto-created if it does not exist.
145 function api:shared(...)
146 if not self.shared_data then self.shared_data = {}; end
147 local paths = { n = select("#", ...), ... };
148 local data_array = {};
149 local default_path_components = { self.host, self.name };
150 for i = 1, paths.n do
151 local path = paths[i];
152 if path:sub(1,1) ~= "/" then -- Prepend default components
153 local n_components = select(2, path:gsub("/", "%1"));
154 path = (n_components<#default_path_components and "/" or "")..t_concat(default_path_components, "/", 1, #default_path_components-n_components).."/"..path;
156 local shared = shared_data[path];
159 shared_data[path] = shared;
161 t_insert(data_array, shared);
162 self.shared_data[path] = shared;
164 return unpack(data_array);
167 function api:get_option(name, default_value)
168 local value = config.get(self.host, self.name, name);
170 value = config.get(self.host, "core", name);
172 value = default_value;
178 function api:get_option_string(name, default_value)
179 local value = self:get_option(name, default_value);
180 if type(value) == "table" then
182 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
189 return tostring(value);
192 function api:get_option_number(name, ...)
193 local value = self:get_option(name, ...);
194 if type(value) == "table" then
196 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
200 local ret = tonumber(value);
201 if value ~= nil and ret == nil then
202 self:log("error", "Config option '%s' not understood, expecting a number", name);
207 function api:get_option_boolean(name, ...)
208 local value = self:get_option(name, ...);
209 if type(value) == "table" then
211 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
218 local ret = value == true or value == "true" or value == 1 or nil;
220 ret = (value == false or value == "false" or value == 0);
228 self:log("error", "Config option '%s' not understood, expecting true/false", name);
233 function api:get_option_array(name, ...)
234 local value = self:get_option(name, ...);
240 if type(value) ~= "table" then
241 return array{ value }; -- Assume any non-list is a single-item list
244 return array():append(value); -- Clone
247 function api:get_option_set(name, ...)
248 local value = self:get_option_array(name, ...);
254 return set.new(value);
257 local module_items = multitable_new();
258 function api:add_item(key, value)
259 self.items = self.items or {};
260 self.items[key] = self.items[key] or {};
261 t_insert(self.items[key], value);
262 self:fire_event("item-added/"..key, {source = self, item = value});
264 function api:remove_item(key, value)
265 local t = self.items and self.items[key] or NULL;
267 if t[i] == value then
268 t_remove(self.items[key], i);
269 self:fire_event("item-removed/"..key, {source = self, item = value});
275 function api:get_host_items(key)
277 for mod_name, module in pairs(modulemanager.get_modules(self.host)) do
278 module = module.module;
280 for _, item in ipairs(module.items[key] or NULL) do
281 t_insert(result, item);
285 for mod_name, module in pairs(modulemanager.get_modules("*")) do
286 module = module.module;
288 for _, item in ipairs(module.items[key] or NULL) do
289 t_insert(result, item);
296 function api:handle_items(type, added_cb, removed_cb, existing)
297 self:hook("item-added/"..type, added_cb);
298 self:hook("item-removed/"..type, removed_cb);
299 if existing ~= false then
300 for _, item in ipairs(self:get_host_items(type)) do
301 added_cb({ item = item });
306 function api:provides(name, item)
307 if not item then item = self.environment; end
308 if not item.name then
309 local item_name = self.name;
310 -- Strip a provider prefix to find the item name
311 -- (e.g. "auth_foo" -> "foo" for an auth provider)
312 if item_name:find(name.."_", 1, true) == 1 then
313 item_name = item_name:sub(#name+2);
315 item.name = item_name;
317 self:add_item(name.."-provider", item);
320 function api:send(stanza)
321 return core_post_stanza(hosts[self.host], stanza);
324 function api:add_timer(delay, callback)
325 return timer.add_task(delay, function (t)
326 if self.loaded == false then return; end