+-- Prosody IM v0.1
+-- Copyright (C) 2008 Matthew Wild
+-- Copyright (C) 2008 Waqas Hussain
+--
+-- This program is free software; you can redistribute it and/or
+-- modify it under the terms of the GNU General Public License
+-- as published by the Free Software Foundation; either version 2
+-- of the License, or (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+--
-local log = require "util.logger".init("modulemanager")
+
+
+local plugin_dir = CFG_PLUGINDIR or "./plugins/";
+
+local logger = require "util.logger";
+local log = logger.init("modulemanager");
+local addDiscoInfoHandler = require "core.discomanager".addDiscoInfoHandler;
local loadfile, pcall = loadfile, pcall;
local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
local tostring, print = tostring, print;
+-- We need this to let modules access the real global namespace
local _G = _G;
module "modulemanager"
-local handler_info = {};
-local handlers = {};
-
-local modulehelpers = setmetatable({}, { __index = _G });
+local api = {}; -- Module API container
-local function _add_iq_handler(module, origin_type, xmlns, handler)
- handlers[origin_type] = handlers[origin_type] or {};
- handlers[origin_type].iq = handlers[origin_type].iq or {};
- if not handlers[origin_type].iq[xmlns] then
- handlers[origin_type].iq[xmlns]= handler;
- handler_info[handler] = module;
- log("debug", "mod_%s now handles tag 'iq' with query namespace '%s'", module.name, xmlns);
- else
- log("warning", "mod_%s wants to handle tag 'iq' with query namespace '%s' but mod_%s already handles that", module.name, xmlns, handler_info[handlers[origin_type].iq[xmlns]].module.name);
- end
-end
+local modulemap = {};
-function modulehelpers.add_iq_handler(origin_type, xmlns, handler)
- if not (origin_type and handler and xmlns) then return false; end
- if type(origin_type) == "table" then
- for _, origin_type in ipairs(origin_type) do
- _add_iq_handler(getfenv(2).module, origin_type, xmlns, handler);
- end
- return;
- end
- _add_iq_handler(getfenv(2).module, origin_type, xmlns, handler);
-end
+local handler_info = {};
+local stanza_handlers = {};
-local function _add_handler(module, origin_type, tag, xmlns, handler)
- handlers[origin_type] = handlers[origin_type] or {};
- if not handlers[origin_type][tag] then
- handlers[origin_type][tag] = handlers[origin_type][tag] or {};
- handlers[origin_type][tag][xmlns]= handler;
- handler_info[handler] = module;
- log("debug", "mod_%s now handles tag '%s'", module.name, tag);
- elseif handler_info[handlers[origin_type][tag]] then
- log("warning", "mod_%s wants to handle tag '%s' but mod_%s already handles that", module.name, tag, handler_info[handlers[origin_type][tag]].module.name);
- end
-end
+local modulehelpers = setmetatable({}, { __index = _G });
-function modulehelpers.add_handler(origin_type, tag, xmlns, handler)
- if not (origin_type and tag and xmlns and handler) then return false; end
- if type(origin_type) == "table" then
- for _, origin_type in ipairs(origin_type) do
- _add_handler(getfenv(2).module, origin_type, tag, xmlns, handler);
- end
- return;
- end
- _add_handler(getfenv(2).module, origin_type, tag, xmlns, handler);
-end
-function load(name)
- local mod, err = loadfile("plugins/mod_"..name..".lua");
+function load(host, module_name, config)
+ if not (host and module_name) then
+ return nil, "insufficient-parameters";
+ end
+ local mod, err = loadfile(plugin_dir.."mod_"..module_name..".lua");
if not mod then
- log("error", "Unable to load module '%s': %s", name or "nil", err or "nil");
+ log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
return nil, err;
end
- local pluginenv = setmetatable({ module = { name = name } }, { __index = modulehelpers });
+ if not modulemap[host] then
+ modulemap[host] = {};
+ stanza_handlers[host] = {};
+ elseif modulemap[host][module_name] then
+ log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
+ return nil, "module-already-loaded";
+ end
+
+ local _log = logger.init(host..":"..module_name);
+ local api_instance = setmetatable({ name = module_name, host = host, config = config, _log = _log, log = function (self, ...) return _log(...); end }, { __index = api });
+
+ local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
setfenv(mod, pluginenv);
+
local success, ret = pcall(mod);
if not success then
log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil");
- return nil, err;
+ return nil, ret;
end
+
+ modulemap[host][module_name] = mod;
+
return true;
end
-function handle_stanza(origin, stanza)
+function is_loaded(host, name)
+ return modulemap[host] and modulemap[host][name] and true;
+end
+
+function unload(host, name, ...)
+ local mod = modulemap[host] and modulemap[host][name];
+ if not mod then return nil, "module-not-loaded"; end
+
+ if type(mod.unload) == "function" then
+ local ok, err = pcall(mod.unload, ...)
+ if (not ok) and err then
+ log("warn", "Non-fatal error unloading module '%s' from '%s': %s", name, host, err);
+ end
+ end
+
+end
+
+function handle_stanza(host, origin, stanza)
local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
+ local handlers = stanza_handlers[host];
+ if not handlers then
+ log("warn", "No handlers for %s", host);
+ return false;
+ end
+
if name == "iq" and xmlns == "jabber:client" and handlers[origin_type] then
- log("debug", "Stanza is an <iq/>");
local child = stanza.tags[1];
if child then
- local xmlns = child.attr.xmlns;
- log("debug", "Stanza has xmlns: %s", xmlns);
- local handler = handlers[origin_type][name][xmlns];
- if handler then
+ local xmlns = child.attr.xmlns or xmlns;
+ log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
+ local handler = handlers[origin_type][name] and handlers[origin_type][name][xmlns];
+ if handler then
log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
return handler(origin, stanza) or true;
end
-
end
elseif handlers[origin_type] then
local handler = handlers[origin_type][name];
return false; -- we didn't handle it
end
+----- API functions exposed to modules -----------
+-- Must all be in api.*
+
+-- Returns the name of the current module
+function api:get_name()
+ return self.name;
+end
+
+-- Returns the host that the current module is serving
+function api:get_host()
+ return self.host;
+end
+
+
+local function _add_iq_handler(module, origin_type, xmlns, handler)
+ local handlers = stanza_handlers[module.host];
+ handlers[origin_type] = handlers[origin_type] or {};
+ handlers[origin_type].iq = handlers[origin_type].iq or {};
+ if not handlers[origin_type].iq[xmlns] then
+ handlers[origin_type].iq[xmlns]= handler;
+ handler_info[handler] = module;
+ module:log("debug", "I now handle tag 'iq' [%s] with payload namespace '%s'", origin_type, xmlns);
+ else
+ 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);
+ end
+end
+
+function api:add_iq_handler(origin_type, xmlns, handler)
+ if not (origin_type and handler and xmlns) then return false; end
+ if type(origin_type) == "table" then
+ for _, origin_type in ipairs(origin_type) do
+ _add_iq_handler(self, origin_type, xmlns, handler);
+ end
+ return;
+ end
+ _add_iq_handler(self, origin_type, xmlns, handler);
+end
+
+function api:add_feature(xmlns)
+ addDiscoInfoHandler(self.host, function(reply, to, from, node)
+ if #node == 0 then
+ reply:tag("feature", {var = xmlns}):up();
+ return true;
+ end
+ end);
+end
+
+
do
local event_handlers = {};
- function modulehelpers.add_event_hook(name, handler)
+ function api:add_event_hook(name, handler)
if not event_handlers[name] then
event_handlers[name] = {};
end
t_insert(event_handlers[name] , handler);
+ self:log("debug", "Subscribed to %s", name);
end
function fire_event(name, ...)
end
end
+
+local function _add_handler(module, origin_type, tag, xmlns, handler)
+ local handlers = stanza_handlers[module.host];
+ handlers[origin_type] = handlers[origin_type] or {};
+ if not handlers[origin_type][tag] then
+ handlers[origin_type][tag] = handlers[origin_type][tag] or {};
+ handlers[origin_type][tag][xmlns]= handler;
+ handler_info[handler] = module;
+ module:log("debug", "I now handle tag '%s' [%s] with xmlns '%s'", tag, origin_type, xmlns);
+ elseif handler_info[handlers[origin_type][tag]] then
+ 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);
+ end
+end
+
+function api:add_handler(origin_type, tag, xmlns, handler)
+ if not (origin_type and tag and xmlns and handler) then return false; end
+ if type(origin_type) == "table" then
+ for _, origin_type in ipairs(origin_type) do
+ _add_handler(self, origin_type, tag, xmlns, handler);
+ end
+ return;
+ end
+ _add_handler(self, origin_type, tag, xmlns, handler);
+end
+
+--------------------------------------------------------------------
+
return _M;