-- 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 modulemanager = require "core.modulemanager";

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

local type = type;

local ipairs = ipairs;

local pairs = pairs;

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

local jid_prep = require "util.jid".prep;

local config = require "core.configmanager";

local hosts = hosts;

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

local storagemanager = require "core.storagemanager";

local prosody = _G.prosody;

local setmetatable = setmetatable;

local default_provider = "internal_plain";

module "usermanager"

function new_null_provider()

	local function dummy() return nil, "method not implemented"; end;

	local function dummy_get_sasl_handler() return sasl_new(nil, {}); end

	return setmetatable({name = "null", get_sasl_handler = dummy_get_sasl_handler}, {

		__index = function(self, method) return dummy; end

	});

end

local provider_mt = { __index = new_null_provider() };

function initialize_host(host)

	local host_session = hosts[host];

	if host_session.type ~= "local" then return; end

	host_session.events.add_handler("item-added/auth-provider", function (event)

		local provider = event.item;

		local auth_provider = config.get(host, "core", "authentication") or default_provider;

		if config.get(host, "core", "anonymous_login") then

			log("error", "Deprecated config option 'anonymous_login'. Use authentication = 'anonymous' instead.");

			auth_provider = "anonymous";

		end -- COMPAT 0.7

		if provider.name == auth_provider then

			host_session.users = setmetatable(provider, provider_mt);

		end

		if host_session.users ~= nil and host_session.users.name ~= nil then

			log("debug", "host '%s' now set to use user provider '%s'", host, host_session.users.name);

		end

	end);

	host_session.events.add_handler("item-removed/auth-provider", function (event)

		local provider = event.item;

		if host_session.users == provider then

			host_session.users = new_null_provider();

		end

	end);

	host_session.users = new_null_provider(); -- Start with the default usermanager provider

	local auth_provider = config.get(host, "core", "authentication") or default_provider;

	if config.get(host, "core", "anonymous_login") then auth_provider = "anonymous"; end -- COMPAT 0.7

	if auth_provider ~= "null" then

		modulemanager.load(host, "auth_"..auth_provider);

	end

end;

prosody.events.add_handler("host-activated", initialize_host, 100);

function test_password(username, host, password)

	return hosts[host].users.test_password(username, password);

end

function get_password(username, host)

	return hosts[host].users.get_password(username);

end

function set_password(username, password, host)

	return hosts[host].users.set_password(username, password);

end

function user_exists(username, host)

	return hosts[host].users.user_exists(username);

end

function create_user(username, password, host)

	return hosts[host].users.create_user(username, password);

end

function delete_user(username, host)

	local ok, err = hosts[host].users.delete_user(username);

	if not ok then return nil, err; end

	prosody.events.fire_event("user-deleted", { username = username, host = host });

end

function get_sasl_handler(host, session)

	return hosts[host].users.get_sasl_handler(session);

end

function get_provider(host)

	return hosts[host].users;

end

function is_admin(jid, host)

	if host and not hosts[host] then return false; end

	if type(jid) ~= "string" then return false; end

	local is_admin;

	jid = jid_bare(jid);

	host = host or "*";

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

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

	if host_admins and host_admins ~= global_admins then

		if type(host_admins) == "table" then

			for _,admin in ipairs(host_admins) do

				if jid_prep(admin) == jid then

					is_admin = true;

					break;

				end

			end

		elseif host_admins then

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

		end

	end

	if not is_admin and global_admins then

		if type(global_admins) == "table" then

			for _,admin in ipairs(global_admins) do

				if jid_prep(admin) == jid then

					is_admin = true;

					break;

				end

			end

		elseif global_admins then

			log("error", "Global option 'admins' is not a list");

		end

	end

	-- Still not an admin, check with auth provider

	if not is_admin and host ~= "*" and hosts[host].users and hosts[host].users.is_admin then

		is_admin = hosts[host].users.is_admin(jid);

	end

	return is_admin or false;

end

return _M;