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-- Prosody IM v0.3
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local _G = _G;
local setmetatable, loadfile, pcall, rawget, rawset, io, error =
setmetatable, loadfile, pcall, rawget, rawset, io, error;
module "configmanager"
local parsers = {};
local config = { ["*"] = { core = {} } };
local global_config = config["*"];
-- When host not found, use global
setmetatable(config, { __index = function () return global_config; end});
local host_mt = { __index = global_config };
-- When key not found in section, check key in global's section
function section_mt(section_name)
return { __index = function (t, k)
local section = rawget(global_config, section_name);
if not section then return nil; end
return section[k];
end };
end
function getconfig()
return config;
end
function get(host, section, key)
local sec = config[host][section];
if sec then
return sec[key];
end
return nil;
end
function set(host, section, key, value)
if host and section and key then
local hostconfig = rawget(config, host);
if not hostconfig then
hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
end
if not rawget(hostconfig, section) then
hostconfig[section] = setmetatable({}, section_mt(section));
end
hostconfig[section][key] = value;
return true;
end
return false;
end
function load(filename, format)
format = format or filename:match("%w+$");
if parsers[format] and parsers[format].load then
local f, err = io.open(filename);
if f then
local ok, err = parsers[format].load(f:read("*a"));
f:close();
return ok, "parser", err;
end
return f, "file", err;
end
if not format then
return nil, "file", "no parser specified";
else
return nil, "file", "no parser for "..(format);
end
end
function save(filename, format)
end
function addparser(format, parser)
if format and parser then
parsers[format] = parser;
end
end
-- Built-in Lua parser
do
local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable;
local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring;
parsers.lua = {};
function parsers.lua.load(data)
local env;
-- The ' = true' are needed so as not to set off __newindex when we assign the functions below
env = setmetatable({ Host = true; host = true; Component = true, component = true,
Include = true, include = true }, { __index = function (t, k)
return rawget(_G, k) or
function (settings_table)
config[__currenthost or "*"][k] = settings_table;
end;
end,
__newindex = function (t, k, v)
set(env.__currenthost or "*", "core", k, v);
end});
function env.Host(name)
rawset(env, "__currenthost", name);
-- Needs at least one setting to logically exist :)
set(name or "*", "core", "defined", true);
end
env.host = env.Host;
function env.Component(name)
return function (module)
set(name, "core", "component_module", module);
-- Don't load the global modules by default
set(name, "core", "modules_enable", false);
rawset(env, "__currenthost", name);
end
end
env.component = env.Component;
function env.Include(file)
local f, err = io.open(file);
if f then
local data = f:read("*a");
local ok, err = parsers.lua.load(data);
if not ok then error(err:gsub("%[string.-%]", file), 0); end
end
if not f then error("Error loading included "..file..": "..err, 0); end
return f, err;
end
env.include = env.Include;
local chunk, err = loadstring(data);
if not chunk then
return nil, err;
end
setfenv(chunk, env);
local ok, err = pcall(chunk);
if not ok then
return nil, err;
end
return true;
end
end
return _M;
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