-- Prosody IM

-- 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.

--

require "util.datamanager"

local datamanager = datamanager;

local log = require "util.logger".init("usermanager");

local type = type;

local error = error;

local ipairs = ipairs;

local hashes = require "util.hashes";

local jid_bare = require "util.jid".bare;

local config = require "core.configmanager";

module "usermanager"

function validate_credentials(host, username, password, method)

	log("debug", "User '%s' is being validated", username);

	local credentials = datamanager.load(username, host, "accounts") or {};

	if method == nil then method = "PLAIN"; end

	if method == "PLAIN" and credentials.password then -- PLAIN, do directly

		if password == credentials.password then

			return true;

		else

			return nil, "Auth failed. Invalid username or password.";

		end

  end

	-- must do md5

	-- make credentials md5

	local pwd = credentials.password;

	if not pwd then pwd = credentials.md5; else pwd = hashes.md5(pwd, true); end

	-- make password md5

	if method == "PLAIN" then

		password = hashes.md5(password or "", true);

	elseif method ~= "DIGEST-MD5" then

		return nil, "Unsupported auth method";

	end

	-- compare

	if password == pwd then

		return true;

	else

		return nil, "Auth failed. Invalid username or password.";

	end

end

function get_password(username, host)

  return (datamanager.load(username, host, "accounts") or {}).password

end

function user_exists(username, host)

	return datamanager.load(username, host, "accounts") ~= nil; -- FIXME also check for empty credentials

end

function create_user(username, password, host)

	return datamanager.store(username, host, "accounts", {password = password});

end

function get_supported_methods(host)

	return {["PLAIN"] = true, ["DIGEST-MD5"] = true}; -- TODO this should be taken from the config

end

function is_admin(jid)

	local admins = config.get("*", "core", "admins");

	if type(admins) == "table" then

		jid = jid_bare(jid);

		for _,admin in ipairs(admins) do

			if admin == jid then return true; end

		end

	else log("debug", "Option core.admins is not a table"); end

	return nil;

end

return _M;