-- 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 config = require "core.configmanager";

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

local storagemanager = require "core.storagemanager";

local prosody = _G.prosody;

local hosts = prosody.hosts;

local setmetatable = setmetatable;

local default_provider = "internal_hashed";

local _ENV = nil;

-- luacheck: std none

local 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 --luacheck: ignore 212

	});

end

	get_user_roles = function (user) end; --luacheck: ignore 212/user

	set_user_roles = function (user, roles) end; -- luacheck: ignore 212

	set_jid_roles = function (jid, roles) end; -- luacheck: ignore 212

	get_user_default_role = function (user) end; -- luacheck: ignore 212

	get_users_with_role = function (role_name) end; -- luacheck: ignore 212

	get_jid_role = function (jid) end; -- luacheck: ignore 212

	set_jid_role = function (jid) end; -- luacheck: ignore 212

	add_default_permission = function (role_name, action, policy) end; -- luacheck: ignore 212

	get_role_by_name = function (role_name) end; -- luacheck: ignore 212

};

local provider_mt = { __index = new_null_provider() };

local function initialize_host(host)

	local host_session = hosts[host];

	local authz_provider_name = config.get(host, "authorization") or "internal";

	local authz_mod = modulemanager.load(host, "authz_"..authz_provider_name);

	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, "authentication") or default_provider;

		if config.get(host, "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, "authentication") or default_provider;

	if config.get(host, "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);

local function test_password(username, host, password)

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

end

local function get_password(username, host)

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

end

local function set_password(username, password, host, resource)

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

	if ok then

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

	end

	return ok, err;

end

local function get_account_info(username, host)

	local method = hosts[host].users.get_account_info;

	if not method then return nil, "method-not-supported"; end

	return method(username);

end

local function user_exists(username, host)

	if hosts[host].sessions[username] then return true; end

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

end

local function create_user(username, password, host)

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

end

local 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 });

	return storagemanager.purge(username, host);

end

local function users(host)

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

end

local function get_sasl_handler(host, session)

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

end

local function get_provider(host)

	return hosts[host].users;

end

-- Returns a map of { [role_name] = role, ... } that a user is allowed to assume

local function get_user_roles(user, host)

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

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

end

local function get_user_default_role(user, host)

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

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

end

-- Accepts a set of role names which the user is allowed to assume

local function set_user_roles(user, host, roles)

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

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

	if ok then

		prosody.events.fire_event("user-roles-changed", {

			username = user, host = host

		});

	end

	return ok, err;

end

local function get_jid_role(jid, host)

	local jid_node, jid_host = jid_split(jid);

	if host == jid_host and jid_node then

	end

end

local function set_jid_role(jid, host, role_name)

	local _, jid_host = jid_split(jid);

	if host == jid_host then

		return nil, "unexpected-local-jid";

	end

end

local function get_users_with_role(role, host)

	if not hosts[host] then return false; end

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

	return hosts[host].authz.get_users_with_role(role);

end

local function get_jids_with_role(role, host)

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

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

end

local function get_role_by_name(role_name, host)

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

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

end

return {

	new_null_provider = new_null_provider;

	initialize_host = initialize_host;

	test_password = test_password;

	get_password = get_password;

	set_password = set_password;

	get_account_info = get_account_info;

	user_exists = user_exists;

	create_user = create_user;

	delete_user = delete_user;

	users = users;

	get_sasl_handler = get_sasl_handler;

	get_provider = get_provider;

	get_user_default_role = get_user_default_role;

	get_user_roles = get_user_roles;

	set_user_roles = set_user_roles;

	get_users_with_role = get_users_with_role;

	get_jid_role = get_jid_role;

	set_jid_role = set_jid_role;

	get_jids_with_role = get_jids_with_role;

	get_role_by_name = get_role_by_name;

};