mirror of
https://github.com/bjc/prosody.git
synced 2025-04-04 21:57:45 +03:00
271 lines
8.1 KiB
Lua
271 lines
8.1 KiB
Lua
-- Prosody IM
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-- Copyright (C) 2008-2010 Matthew Wild
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-- Copyright (C) 2008-2010 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local logger = require "util.logger";
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local log = logger.init("modulemanager");
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local config = require "core.configmanager";
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local pluginloader = require "util.pluginloader";
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local hosts = hosts;
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local prosody = prosody;
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local loadfile, pcall, xpcall = loadfile, pcall, xpcall;
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local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
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local pairs, ipairs = pairs, ipairs;
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local t_insert, t_concat = table.insert, table.concat;
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local type = type;
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local next = next;
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local rawget = rawget;
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local error = error;
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local tostring, tonumber = tostring, tonumber;
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local debug_traceback = debug.traceback;
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local unpack, select = unpack, select;
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pcall = function(f, ...)
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local n = select("#", ...);
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local params = {...};
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return xpcall(function() return f(unpack(params, 1, n)) end, function(e) return tostring(e).."\n"..debug_traceback(); end);
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end
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local array, set = require "util.array", require "util.set";
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local autoload_modules = {"presence", "message", "iq", "offline"};
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local component_inheritable_modules = {"tls", "dialback", "iq"};
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-- We need this to let modules access the real global namespace
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local _G = _G;
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module "modulemanager"
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local api = _G.require "core.moduleapi"; -- Module API container
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-- [host] = { [module] = module_env }
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local modulemap = { ["*"] = {} };
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local NULL = {};
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-- Load modules when a host is activated
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function load_modules_for_host(host)
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local component = config.get(host, "core", "component_module");
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local global_modules_enabled = config.get("*", "core", "modules_enabled");
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local global_modules_disabled = config.get("*", "core", "modules_disabled");
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local host_modules_enabled = config.get(host, "core", "modules_enabled");
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local host_modules_disabled = config.get(host, "core", "modules_disabled");
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if host_modules_enabled == global_modules_enabled then host_modules_enabled = nil; end
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if host_modules_disabled == global_modules_disabled then host_modules_disabled = nil; end
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local global_modules = set.new(autoload_modules) + set.new(global_modules_enabled) - set.new(global_modules_disabled);
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if component then
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global_modules = set.intersection(set.new(component_inheritable_modules), global_modules);
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end
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local modules = (global_modules + set.new(host_modules_enabled)) - set.new(host_modules_disabled);
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-- COMPAT w/ pre 0.8
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if modules:contains("console") then
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log("error", "The mod_console plugin has been renamed to mod_admin_telnet. Please update your config.");
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modules:remove("console");
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modules:add("admin_telnet");
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end
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if component then
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load(host, component);
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end
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for module in modules do
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load(host, module);
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end
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end
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prosody.events.add_handler("host-activated", load_modules_for_host);
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--- Private helpers ---
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local function do_unload_module(host, name)
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local mod = get_module(host, name);
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if not mod then return nil, "module-not-loaded"; end
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if module_has_method(mod, "unload") then
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local ok, err = call_module_method(mod, "unload");
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if (not ok) and err then
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log("warn", "Non-fatal error unloading module '%s' on '%s': %s", name, host, err);
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end
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end
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for handler, event in pairs(mod.module.event_handlers) do
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event.object.remove_handler(event.name, handler);
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end
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if mod.module.items then -- remove items
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for key,t in pairs(mod.module.items) do
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for i = #t,1,-1 do
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local value = t[i];
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t[i] = nil;
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hosts[host].events.fire_event("item-removed/"..key, {source = mod.module, item = value});
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end
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end
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end
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modulemap[host][name] = nil;
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return true;
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end
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local function do_load_module(host, module_name)
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if not (host and module_name) then
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return nil, "insufficient-parameters";
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elseif not hosts[host] then
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return nil, "unknown-host";
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end
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if not modulemap[host] then
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modulemap[host] = {};
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end
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if modulemap[host][module_name] then
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log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
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return nil, "module-already-loaded";
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elseif modulemap["*"][module_name] then
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return nil, "global-module-already-loaded";
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end
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local mod, err = pluginloader.load_code(module_name);
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if not mod then
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log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
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return nil, err;
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end
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local _log = logger.init(host..":"..module_name);
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local api_instance = setmetatable({ name = module_name, host = host, path = err,
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_log = _log, log = function (self, ...) return _log(...); end, event_handlers = {} }
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, { __index = api });
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local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
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api_instance.environment = pluginenv;
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setfenv(mod, pluginenv);
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hosts[host].modules = modulemap[host];
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modulemap[host][module_name] = pluginenv;
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local ok, err = pcall(mod);
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if ok then
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-- Call module's "load"
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if module_has_method(pluginenv, "load") then
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ok, err = call_module_method(pluginenv, "load");
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if not ok then
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log("warn", "Error loading module '%s' on '%s': %s", module_name, host, err or "nil");
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end
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end
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-- Use modified host, if the module set one
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if api_instance.host == "*" and host ~= "*" then
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modulemap[host][module_name] = nil;
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modulemap["*"][module_name] = pluginenv;
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api_instance:set_global();
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end
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else
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log("error", "Error initializing module '%s' on '%s': %s", module_name, host, err or "nil");
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do_unload_module(api_instance.host, module_name); -- Ignore error, module may be partially-loaded
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end
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return ok and mod, err;
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end
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local function do_reload_module(host, name)
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local mod = get_module(host, name);
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if not mod then return nil, "module-not-loaded"; end
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local _mod, err = pluginloader.load_code(name); -- checking for syntax errors
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if not _mod then
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log("error", "Unable to load module '%s': %s", name or "nil", err or "nil");
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return nil, err;
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end
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local saved;
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if module_has_method(mod, "save") then
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local ok, ret, err = call_module_method(mod, "save");
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if ok then
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saved = ret;
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else
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log("warn", "Error saving module '%s:%s' state: %s", host, name, ret);
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if not config.get(host, "core", "force_module_reload") then
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log("warn", "Aborting reload due to error, set force_module_reload to ignore this");
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return nil, "save-state-failed";
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else
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log("warn", "Continuing with reload (using the force)");
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end
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end
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end
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do_unload_module(host, name);
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local ok, err = do_load_module(host, name);
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if ok then
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mod = get_module(host, name);
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if module_has_method(mod, "restore") then
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local ok, err = call_module_method(mod, "restore", saved or {})
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if (not ok) and err then
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log("warn", "Error restoring module '%s' from '%s': %s", name, host, err);
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end
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end
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end
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return ok and mod, err;
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end
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--- Public API ---
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-- Load a module and fire module-loaded event
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function load(host, name)
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local mod, err = do_load_module(host, name);
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if mod then
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(hosts[mod.host] or prosody).events.fire_event("module-loaded", { module = module_name, host = host });
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end
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return mod, err;
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end
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-- Unload a module and fire module-unloaded
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function unload(host, name)
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local ok, err = do_unload_module(host, name);
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if ok then
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(hosts[host] or prosody).events.fire_event("module-unloaded", { module = name, host = host });
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end
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return ok, err;
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end
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function reload(host, name)
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local ok, err = do_reload_module(host, name);
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if ok then
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(hosts[host] or prosody).events.fire_event("module-reloaded", { module = name, host = host });
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elseif not is_loaded(host, name) then
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(hosts[host] or prosody).events.fire_event("module-unloaded", { module = name, host = host });
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end
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return ok, err;
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end
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function get_module(host, name)
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return modulemap[host] and modulemap[host][name];
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end
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function get_modules(host)
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return modulemap[host];
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end
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function is_loaded(host, name)
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return modulemap[host] and modulemap[host][name] and true;
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end
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function module_has_method(module, method)
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return type(module.module[method]) == "function";
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end
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function call_module_method(module, method, ...)
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if module_has_method(module, method) then
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local f = module.module[method];
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return pcall(f, ...);
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else
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return false, "no-such-method";
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end
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end
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return _M;
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