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core/modulemanager.lua @ 569:5216efe6088b
Add hostmanager, and eventmanager
author | Matthew Wild <mwild1@gmail.com> |
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date | Sat, 06 Dec 2008 03:41:49 +0000 |
parent | 540:ec03f6968fa8 |
child | 573:f6555ebf84ec |
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-- 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 plugin_dir = CFG_PLUGINDIR or "./plugins/"; local logger = require "util.logger"; local log = logger.init("modulemanager"); local addDiscoInfoHandler = require "core.discomanager".addDiscoInfoHandler; local eventmanager = require "core.eventmanager"; local loadfile, pcall = loadfile, pcall; local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv; local pairs, ipairs = pairs, ipairs; local t_insert = table.insert; local type = type; local tostring, print = tostring, print; -- We need this to let modules access the real global namespace local _G = _G; module "modulemanager" local api = {}; -- Module API container local modulemap = {}; local handler_info = {}; local stanza_handlers = {}; local modulehelpers = setmetatable({}, { __index = _G }); 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", module_name or "nil", err or "nil"); return nil, err; end 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, ret; end modulemap[host][module_name] = mod; return true; end 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 local child = stanza.tags[1]; if child 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]; if handler then handler = handler[xmlns]; if handler then log("debug", "Passing stanza to mod_%s", handler_info[handler].name); return handler(origin, stanza) or true; end end end log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns); 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 api.add_event_hook = eventmanager.add_event_hook; 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;