-- Prosody IM

-- Copyright (C) 2008-2010 Matthew Wild

-- Copyright (C) 2008-2010 Waqas Hussain

-- 

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

local dir_sep, path_sep = package.config:match("^(%S+)%s(%S+)");

local plugin_dir = {};

for path in (CFG_PLUGINDIR or "./plugins/"):gsub("[/\\]", dir_sep):gmatch("[^"..path_sep.."]+") do

	path = path..dir_sep; -- add path separator to path end

	path = path:gsub(dir_sep..dir_sep.."+", dir_sep); -- coalesce multiple separaters

	plugin_dir[#plugin_dir + 1] = path;

end

local io_open = io.open;

local envload = require "util.envload".envload;

module "pluginloader"

function load_file(names)

	local file, err, path;

	for i=1,#plugin_dir do

		for j=1,#names do

			path = plugin_dir[i]..names[j];

			file, err = io_open(path);

			if file then

				local content = file:read("*a");

				file:close();

				return content, path;

			end

		end

	end

	return file, err;

end

function load_resource(plugin, resource)

	resource = resource or "mod_"..plugin..".lua";

	local names = {

		"mod_"..plugin.."/"..plugin.."/"..resource; -- mod_hello/hello/mod_hello.lua

		"mod_"..plugin.."/"..resource;              -- mod_hello/mod_hello.lua

		plugin.."/"..resource;                      -- hello/mod_hello.lua

		resource;                                   -- mod_hello.lua

	};

	return load_file(names);

end

function load_code(plugin, resource, env)

	local content, err = load_resource(plugin, resource);

	if not content then return content, err; end

	local path = err;

	local f, err = envload(content, "@"..path, env);

	if not f then return f, err; end

	return f, path;

end

return _M;