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-- 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 log = require "util.logger".init("auth_anonymous");
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));