#!/usr/bin/env lua

-- 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.

--

-- prosodyctl - command-line controller for Prosody XMPP server

-- Will be modified by configure script if run --

CFG_SOURCEDIR=nil;

CFG_CONFIGDIR=os.getenv("PROSODY_CFGDIR");

CFG_PLUGINDIR=nil;

CFG_DATADIR=os.getenv("PROSODY_DATADIR");

-- -- -- -- -- -- -- ---- -- -- -- -- -- -- -- --

if CFG_SOURCEDIR then

	package.path = CFG_SOURCEDIR.."/?.lua;"..package.path

	package.cpath = CFG_SOURCEDIR.."/?.so;"..package.cpath

end

if CFG_DATADIR then

	if os.getenv("HOME") then

		CFG_DATADIR = CFG_DATADIR:gsub("^~", os.getenv("HOME"));

	end

end

if not require "util.dependencies".check_dependencies() then

	os.exit(1);

end

config = require "core.configmanager"

do

	-- TODO: Check for other formats when we add support for them

	-- Use lfs? Make a new conf/ dir?

	local ok, level, err = config.load((CFG_CONFIGDIR or ".").."/prosody.cfg.lua");

	if not ok then

		print("\n");

		print("**************************");

		if level == "parser" then

			print("A problem occured while reading the config file "..(CFG_CONFIGDIR or ".").."/prosody.cfg.lua");

			local err_line, err_message = tostring(err):match("%[string .-%]:(%d*): (.*)");

			print("Error"..(err_line and (" on line "..err_line) or "")..": "..(err_message or tostring(err)));

			print("");

		elseif level == "file" then

			print("Prosody was unable to find the configuration file.");

			print("We looked for: "..(CFG_CONFIGDIR or ".").."/prosody.cfg.lua");

			print("A sample config file is included in the Prosody download called prosody.cfg.lua.dist");

			print("Copy or rename it to prosody.cfg.lua and edit as necessary.");

		end

		print("More help on configuring Prosody can be found at http://prosody.im/doc/configure");

		print("Good luck!");

		print("**************************");

		print("");

		os.exit(1);

	end

end

prosody = { hosts = {}, events = events, platform = "posix" };

local data_path = config.get("*", "core", "data_path") or CFG_DATADIR or "data";

require "util.datamanager".set_data_path(data_path);

-- Switch away from root and into the prosody user --

local switched_user, current_uid;

local want_pposix_version = "0.3.3";

local ok, pposix = pcall(require, "util.pposix");

if ok and pposix then

	if pposix._VERSION ~= want_pposix_version then print(string.format("Unknown version (%s) of binary pposix module, expected %s", tostring(pposix._VERSION), want_pposix_version)); return; end

	current_uid = pposix.getuid();

	if current_uid == 0 then

		-- We haz root!

		local desired_user = config.get("*", "core", "prosody_user") or "prosody";

		local desired_group = config.get("*", "core", "prosody_group") or desired_user;

		local ok, err = pposix.setgid(desired_group);

		if ok then

			ok, err = pposix.setuid(desired_user);

			if ok then

				-- Yay!

				switched_user = true;

			end

		end

		if not switched_user then

			-- Boo!

			print("Warning: Couldn't switch to Prosody user/group '"..tostring(desired_user).."'/'"..tostring(desired_group).."': "..tostring(err));

		end

	end

	-- Set our umask to protect data files

	pposix.umask(config.get("*", "core", "umask") or "027");

else

	print("Error: Unable to load pposix module. Check that Prosody is installed correctly.")

	print("For more help send the below error to us through http://prosody.im/discuss");

	print(tostring(pposix))

end

local error_messages = setmetatable({ 

		["invalid-username"] = "The given username is invalid in a Jabber ID";

		["invalid-hostname"] = "The given hostname is invalid";

		["no-password"] = "No password was supplied";

		["no-such-user"] = "The given user does not exist on the server";

		["unable-to-save-data"] = "Unable to store, perhaps you don't have permission?";

		["no-pidfile"] = "There is no 'pidfile' option in the configuration file, see http://prosody.im/doc/prosodyctl#pidfile for help";

		["no-such-method"] = "This module has no commands";

		["not-running"] = "Prosody is not running";

		}, { __index = function (t,k) return "Error: "..(tostring(k):gsub("%-", " "):gsub("^.", string.upper)); end });

local events = require "util.events".new();

hosts = prosody.hosts;

for hostname, config in pairs(config.getconfig()) do

	hosts[hostname] = { events = events };

end

require "core.modulemanager"

require "util.prosodyctl"

require "socket"

-----------------------

function show_message(msg, ...)

	print(msg:format(...));

end

function show_warning(msg, ...)

	print(msg:format(...));

end

function show_usage(usage, desc)

	print("Usage: "..arg[0].." "..usage);

	if desc then

		print(" "..desc);

	end

end

local function getchar(n)

	local stty_ret = os.execute("stty raw -echo 2>/dev/null");

	local ok, char;

	if stty_ret == 0 then

		ok, char = pcall(io.read, n or 1);

		os.execute("stty sane");

	else

		ok, char = pcall(io.read, "*l");

		if ok then

			char = char:sub(1, n or 1);

		end

	end

	if ok then

		return char;

	end

end

local function getpass()

	local stty_ret = os.execute("stty -echo 2>/dev/null");

	if stty_ret ~= 0 then

		io.write("\027[08m"); -- ANSI 'hidden' text attribute

	end

	local ok, pass = pcall(io.read, "*l");

	if stty_ret == 0 then

		os.execute("stty sane");

	else

		io.write("\027[00m");

	end

	io.write("\n");

	if ok then

		return pass;

	end

end

function show_yesno(prompt)

	io.write(prompt, " ");

	local choice = getchar():lower();

	io.write("\n");

	if not choice:match("%a") then

		choice = prompt:match("%[.-(%U).-%]$");

		if not choice then return nil; end

	end

	return (choice == "y");

end

local function read_password()

	local password;

	while true do

		io.write("Enter new password: ");

		password = getpass();

		if not password then

			show_message("No password - cancelled");

			return;

		end

		io.write("Retype new password: ");

		if getpass() ~= password then

			if not show_yesno [=[Passwords did not match, try again? [Y/n]]=] then

				return;

			end

		else

			break;

		end

	end

	return password;

end

local prosodyctl_timeout = (config.get("*", "core", "prosodyctl_timeout") or 5) * 2;

-----------------------

local commands = {};

local command = arg[1];

function commands.adduser(arg)

	if not arg[1] or arg[1] == "--help" then

		show_usage([[adduser JID]], [[Create the specified user account in Prosody]]);

		return 1;

	end

	local user, host = arg[1]:match("([^@]+)@(.+)");

	if not user and host then

		show_message [[Failed to understand JID, please supply the JID you want to create]]

		show_usage [[adduser user@host]]

		return 1;

	end

	if not host then

		show_message [[Please specify a JID, including a host. e.g. alice@example.com]];

		return 1;

	end

	if prosodyctl.user_exists{ user = user, host = host } then

		show_message [[That user already exists]];

		return 1;

	end

	if not hosts[host] then

		show_warning("The host '%s' is not listed in the configuration file (or is not enabled).", host)

		show_warning("The user will not be able to log in until this is changed.");

	end

	local password = read_password();

	if not password then return 1; end

	local ok, msg = prosodyctl.adduser { user = user, host = host, password = password };

	if ok then return 0; end

	show_message(error_messages[msg])

	return 1;

end

function commands.passwd(arg)

	if not arg[1] or arg[1] == "--help" then

		show_usage([[passwd JID]], [[Set the password for the specified user account in Prosody]]);

		return 1;

	end

	local user, host = arg[1]:match("([^@]+)@(.+)");

	if not user and host then

		show_message [[Failed to understand JID, please supply the JID you want to set the password for]]

		show_usage [[passwd user@host]]

		return 1;

	end

	if not host then

		show_message [[Please specify a JID, including a host. e.g. alice@example.com]];

		return 1;

	end

	if not prosodyctl.user_exists { user = user, host = host } then

		show_message [[That user does not exist, use prosodyctl adduser to create a new user]]

		return 1;

	end

	local password = read_password();

	if not password then return 1; end

	local ok, msg = prosodyctl.passwd { user = user, host = host, password = password };

	if ok then return 0; end

	show_message(error_messages[msg])

	return 1;

end

function commands.deluser(arg)

	if not arg[1] or arg[1] == "--help" then

		show_usage([[deluser JID]], [[Permanently remove the specified user account from Prosody]]);

		return 1;

	end

	local user, host = arg[1]:match("([^@]+)@(.+)");

	if not user and host then

		show_message [[Failed to understand JID, please supply the JID you want to set the password for]]

		show_usage [[passwd user@host]]

		return 1;

	end

	if not host then

		show_message [[Please specify a JID, including a host. e.g. alice@example.com]];

		return 1;

	end

	if not prosodyctl.user_exists { user = user, host = host } then

		show_message [[That user does not exist on this server]]

		return 1;

	end

	local ok, msg = prosodyctl.passwd { user = user, host = host };

	if ok then return 0; end

	show_message(error_messages[msg])

	return 1;

end

function commands.start(arg)

	if arg[1] == "--help" then

		show_usage([[start]], [[Start Prosody]]);

		return 1;

	end

	local ok, ret = prosodyctl.isrunning();

	if not ok then

		show_message(error_messages[ret]);

		return 1;

	end

	if ret then

		local ok, ret = prosodyctl.getpid();

		if not ok then

			show_message("Couldn't get running Prosody's PID");

			show_message(error_messages[ret]);

			return 1;

		end

		show_message("Prosody is already running with PID %s", ret or "(unknown)");

		return 1;

	end

	local ok, ret = prosodyctl.start();

	if ok then

		if config.get("*", "core", "daemonize") ~= false then

			local i=1;

			while true do

				local ok, running = prosodyctl.isrunning();

				if ok and running then

					break;

				elseif i == 5 then

					show_message("Still waiting...");

				elseif i >= prosodyctl_timeout then

					show_message("Prosody is still not running. Please give it some time or check your log files for errors.");

					return 2;

				end

				socket.sleep(0.5);

				i = i + 1;

			end

			show_message("Started");

		end

		return 0;

	end

	show_message("Failed to start Prosody");

	show_message(error_messages[ret])	

	return 1;	

end

function commands.status(arg)

	if arg[1] == "--help" then

		show_usage([[status]], [[Reports the running status of Prosody]]);

		return 1;

	end

	local ok, ret = prosodyctl.isrunning();

	if not ok then

		show_message(error_messages[ret]);

		return 1;

	end

	if ret then

		local ok, ret = prosodyctl.getpid();

		if not ok then

			show_message("Couldn't get running Prosody's PID");

			show_message(error_messages[ret]);

			return 1;

		end

		show_message("Prosody is running with PID %s", ret or "(unknown)");

		return 0;

	else

		show_message("Prosody is not running");

		if not switched_user and current_uid ~= 0 then

			print("\nNote:")

			print(" You will also see this if prosodyctl is not running under");

			print(" the same user account as Prosody. Try running as root (e.g. ");

			print(" with 'sudo' in front) to gain access to Prosody's real status.");

		end

		return 2

	end

	return 1;

end

function commands.stop(arg)

	if arg[1] == "--help" then

		show_usage([[stop]], [[Stop a running Prosody server]]);