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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;
local debug = debug;
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, ret;
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 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
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;
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