#!/usr/bin/env lua

-- Prosody IM v0.4

-- 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

-- Required to be able to find packages installed with luarocks

pcall(require, "luarocks.require")

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

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

local switched_user, current_uid;

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

if ok and pposix then

	current_uid = pposix.getuid();

	if current_uid == 0 then

		-- We haz root!

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

		local ok, err = pposix.setuid(desired_user);

		if ok then

			-- Yay!

			switched_user = true;

		else

			-- Boo!

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

		end

	end

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";

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

hosts = {};

require "core.hostmanager"

require "core.eventmanager".fire_event("server-starting");

require "util.prosodyctl"

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

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)

	os.execute("stty raw -echo");

	local char = io.read(n or 1);

	os.execute("stty sane");

	return char;

end

local function getpass()

	os.execute("stty -echo");

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

	os.execute("stty sane");

	io.write("\n");

	return pass;

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();

		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 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 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: You will also see this if prosodyctl is not running under the same");

			print("      user account as Prosody. Try running as root (e.g. with 'sudo' in front) to");

			print("      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]]);

		return 1;

	end

	if not prosodyctl.isrunning() then

		show_message("Prosody is not running");

		return 1;

	end

	local ok, ret = prosodyctl.stop();

	if ok then return 0; end

	show_message(error_messages[ret]);

	return 1;

end

-- ejabberdctl compatibility

function commands.register(arg)

	local user, host, password = unpack(arg);

	if (not (user and host)) or arg[1] == "--help" then

		if user ~= "--help" then

			if not user then

				show_message [[No username specified]]

			elseif not host then

				show_message [[Please specify which host you want to register the user on]];

			end

		end

		show_usage("register USER HOST [PASSWORD]", "Register a user on the server, with the given password");

		return 1;

	end

	if not password then

		password = read_password();

		if not password then

			show_message [[Unable to register user with no password]];

			return 1;

		end

	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.unregister(arg)

	local user, host = unpack(arg);

	if (not (user and host)) or arg[1] == "--help" then

		if user ~= "--help" then

			if not user then

				show_message [[No username specified]]

			elseif not host then

				show_message [[Please specify which host you want to unregister the user from]];

			end

		end

		show_usage("unregister USER HOST [PASSWORD]", "Permanently remove a user account from the server");

		return 1;

	end

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

	if ok then return 0; end

	show_message(error_messages[msg])

	return 1;

end

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

if not commands[command] then -- Show help for all commands

	function show_usage(usage, desc)

		print(" "..usage);

		print("    "..desc);

	end

	print("prosodyctl - Manage a Prosody server");

	print("");

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

	print("");