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core/modulemanager.lua @ 232:20745f8f4cf1
Actually show error and position when we show a traceback :)
author | Matthew Wild <mwild1@gmail.com> |
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date | Sun, 09 Nov 2008 20:15:31 +0000 (2008-11-09) |
parent | 229:01bd24ea488d |
child | 300:0ebf2ef5124e |
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local log = require "util.logger".init("modulemanager") 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; local _G = _G; module "modulemanager" local handler_info = {}; local handlers = {}; local modulehelpers = setmetatable({}, { __index = _G }); 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 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 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 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"); if not mod then log("error", "Unable to load module '%s': %s", name or "nil", err or "nil"); return nil, err; end local pluginenv = setmetatable({ module = { name = name } }, { __index = modulehelpers }); 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; end return true; end function handle_stanza(origin, stanza) local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type; 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 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 do local event_handlers = {}; function modulehelpers.add_event_hook(name, handler) if not event_handlers[name] then event_handlers[name] = {}; end t_insert(event_handlers[name] , handler); end function fire_event(name, ...) local event_handlers = event_handlers[name]; if event_handlers then for name, handler in ipairs(event_handlers) do handler(...); end end end end return _M;