-- Prosody IM

-- Copyright (C) 2008-2010 Matthew Wild

-- Copyright (C) 2008-2010 Waqas Hussain

-- Copyright (C) 2010 Jeff Mitchell

--

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

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

--

local type = type;

local ipairs = ipairs;

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

local config = require "core.configmanager";

local new_sasl = require "util.sasl".new;

local datamanager = require "util.datamanager";

function new_default_provider(host)

	local provider = { name = "anonymous" };

	function provider.test_password(username, password)

		return nil, "Password based auth not supported.";

	end

	function provider.get_password(username)

		return nil, "Password not available.";

	end

	function provider.set_password(username, password)

		return nil, "Password based auth not supported.";

	end

	function provider.user_exists(username)

		return nil, "Only anonymous users are supported."; -- FIXME check if anonymous user is connected?

	end

	function provider.create_user(username, password)

		return nil, "Account creation/modification not supported.";

	end

	function provider.get_sasl_handler()

		local realm = module:get_option("sasl_realm") or module.host;

		local anonymous_authentication_profile = {

			anonymous = function(username, realm)

				return true; -- for normal usage you should always return true here

			end

		};

		return new_sasl(realm, anonymous_authentication_profile);

	end

	function provider.is_admin(jid)

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

		if admins ~= config.get("*", "core", "admins") and type(admins) == "table" then

			jid = jid_bare(jid);

			for _,admin in ipairs(admins) do

				if admin == jid then return true; end

			end

		elseif admins then

			log("error", "Option 'admins' for host '%s' is not a table", host);

		end

		return is_admin(jid); -- Test whether it's a global admin instead

	end

	return provider;

end

local function dm_callback(username, host, datastore, data)

	if host == module.host then

		return false;

	end

	return username, host, datastore, data;

end

local host = hosts[module.host];

local _saved_disallow_s2s = host.disallow_s2s;

function module.load()

	_saved_disallow_s2s = host.disallow_s2s;

	host.disallow_s2s = module:get_option("disallow_s2s") ~= false;

	datamanager.add_callback(dm_callback);

end

function module.unload()

	host.disallow_s2s = _saved_disallow_s2s;

	datamanager.remove_callback(dm_callback);

end

module:add_item("auth-provider", new_default_provider(module.host));