-- 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.

--

module:set_global();

local _G = _G;

local prosody = _G.prosody;

local hosts = prosody.hosts;

local console_listener = { default_port = 5582; default_mode = "*l"; interface = "127.0.0.1" };

local iterators = require "util.iterators";

local keys, values = iterators.keys, iterators.values;

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

local set, array = require "util.set", require "util.array";

local cert_verify_identity = require "util.x509".verify_identity;

local commands = module:shared("commands")

local def_env = module:shared("env");

local default_env_mt = { __index = def_env };

local function redirect_output(_G, session)

	local env = setmetatable({ print = session.print }, { __index = function (t, k) return rawget(_G, k); end });

	env.dofile = function(name)

		local f, err = loadfile(name);

		if not f then return f, err; end

		return setfenv(f, env)();

	end;

	return env;

end

console = {};

function console:new_session(conn)

	local w = function(s) conn:write(s:gsub("\n", "\r\n")); end;

	local session = { conn = conn;

			send = function (t) w(tostring(t)); end;

			print = function (...)

				local t = {};

				for i=1,select("#", ...) do

					t[i] = tostring(select(i, ...));

				end

				w("| "..table.concat(t, "\t").."\n");

			end;

			disconnect = function () conn:close(); end;

			};

	session.env = setmetatable({}, default_env_mt);

	-- Load up environment with helper objects

	for name, t in pairs(def_env) do

		if type(t) == "table" then

			session.env[name] = setmetatable({ session = session }, { __index = t });

		end

	end

	return session;

end

local sessions = {};

function console_listener.onconnect(conn)

	-- Handle new connection

	local session = console:new_session(conn);

	sessions[conn] = session;

	printbanner(session);

	session.send(string.char(0));

end

function console_listener.onincoming(conn, data)

	local session = sessions[conn];

	-- Handle data

	(function(session, data)

		local useglobalenv;

		if data:match("^>") then

			data = data:gsub("^>", "");

			useglobalenv = true;

		elseif data == "\004" then

			commands["bye"](session, data);

			return;

		else

			local command = data:lower();

			command = data:match("^%w+") or data:match("%p");

			if commands[command] then

				commands[command](session, data);

				return;

			end

		end

		session.env._ = data;

		local chunkname = "=console";

		local chunk, err = loadstring("return "..data, chunkname);

		if not chunk then

			chunk, err = loadstring(data, chunkname);

			if not chunk then

				err = err:gsub("^%[string .-%]:%d+: ", "");

				err = err:gsub("^:%d+: ", "");

				err = err:gsub("'<eof>'", "the end of the line");

				session.print("Sorry, I couldn't understand that... "..err);

				return;

			end

		end

		setfenv(chunk, (useglobalenv and redirect_output(_G, session)) or session.env or nil);

		local ranok, taskok, message = pcall(chunk);

		if not (ranok or message or useglobalenv) and commands[data:lower()] then

			commands[data:lower()](session, data);

			return;

		end

		if not ranok then

			session.print("Fatal error while running command, it did not complete");

			session.print("Error: "..taskok);

			return;

		end

		if not message then

			session.print("Result: "..tostring(taskok));

			return;

		elseif (not taskok) and message then

			session.print("Command completed with a problem");

			session.print("Message: "..tostring(message));

			return;

		end

		session.print("OK: "..tostring(message));

	end)(session, data);

	session.send(string.char(0));

end

function console_listener.ondisconnect(conn, err)

	local session = sessions[conn];

	if session then

		session.disconnect();

		sessions[conn] = nil;

	end

end

-- Console commands --

-- These are simple commands, not valid standalone in Lua

function commands.bye(session)

	session.print("See you! :)");

	session.disconnect();

end

commands.quit, commands.exit = commands.bye, commands.bye;

commands["!"] = function (session, data)

	if data:match("^!!") and session.env._ then

		session.print("!> "..session.env._);

		return console_listener.onincoming(session.conn, session.env._);

	end

	local old, new = data:match("^!(.-[^\\])!(.-)!$");

	if old and new then

		local ok, res = pcall(string.gsub, session.env._, old, new);

		if not ok then

			session.print(res)

			return;

		end

		session.print("!> "..res);

		return console_listener.onincoming(session.conn, res);

	end

	session.print("Sorry, not sure what you want");

end

function commands.help(session, data)

	local print = session.print;

	local section = data:match("^help (%w+)");

	if not section then

		print [[Commands are divided into multiple sections. For help on a particular section, ]]

		print [[type: help SECTION (for example, 'help c2s'). Sections are: ]]

		print [[]]

		print [[c2s - Commands to manage local client-to-server sessions]]

		print [[s2s - Commands to manage sessions between this server and others]]

		print [[module - Commands to load/reload/unload modules/plugins]]

		print [[host - Commands to activate, deactivate and list virtual hosts]]

		print [[server - Uptime, version, shutting down, etc.]]

		print [[config - Reloading the configuration, etc.]]

		print [[console - Help regarding the console itself]]

	elseif section == "c2s" then

		print [[c2s:show(jid) - Show all client sessions with the specified JID (or all if no JID given)]]

		print [[c2s:show_insecure() - Show all unencrypted client connections]]

		print [[c2s:show_secure() - Show all encrypted client connections]]

		print [[c2s:close(jid) - Close all sessions for the specified JID]]

	elseif section == "s2s" then

		print [[s2s:show(domain) - Show all s2s connections for the given domain (or all if no domain given)]]

		print [[s2s:close(from, to) - Close a connection from one domain to another]]

	elseif section == "module" then

		print [[module:load(module, host) - Load the specified module on the specified host (or all hosts if none given)]]

		print [[module:reload(module, host) - The same, but unloads and loads the module (saving state if the module supports it)]]

		print [[module:unload(module, host) - The same, but just unloads the module from memory]]

		print [[module:list(host) - List the modules loaded on the specified host]]

	elseif section == "host" then

		print [[host:activate(hostname) - Activates the specified host]]

		print [[host:deactivate(hostname) - Disconnects all clients on this host and deactivates]]

		print [[host:list() - List the currently-activated hosts]]

	elseif section == "server" then

		print [[server:version() - Show the server's version number]]

		print [[server:uptime() - Show how long the server has been running]]

		print [[server:shutdown(reason) - Shut down the server, with an optional reason to be broadcast to all connections]]

	elseif section == "config" then

		print [[config:reload() - Reload the server configuration. Modules may need to be reloaded for changes to take effect.]]

	elseif section == "console" then

		print [[Hey! Welcome to Prosody's admin console.]]

		print [[First thing, if you're ever wondering how to get out, simply type 'quit'.]]

		print [[Secondly, note that we don't support the full telnet protocol yet (it's coming)]]

		print [[so you may have trouble using the arrow keys, etc. depending on your system.]]

		print [[]]

		print [[For now we offer a couple of handy shortcuts:]]

		print [[!! - Repeat the last command]]

		print [[!old!new! - repeat the last command, but with 'old' replaced by 'new']]

		print [[]]

		print [[For those well-versed in Prosody's internals, or taking instruction from those who are,]]

		print [[you can prefix a command with > to escape the console sandbox, and access everything in]]

		print [[the running server. Great fun, but be careful not to break anything :)]]

	end

	print [[]]

end

-- Session environment --

-- Anything in def_env will be accessible within the session as a global variable

def_env.server = {};

function def_env.server:insane_reload()

	prosody.unlock_globals();

	dofile "prosody"

	prosody = _G.prosody;

	return true, "Server reloaded";

end

function def_env.server:version()

	return true, tostring(prosody.version or "unknown");

end

function def_env.server:uptime()

	local t = os.time()-prosody.start_time;

	local seconds = t%60;

	t = (t - seconds)/60;

	local minutes = t%60;

	t = (t - minutes)/60;

	local hours = t%24;

	t = (t - hours)/24;

	local days = t;

	return true, string.format("This server has been running for %d day%s, %d hour%s and %d minute%s (since %s)",

		days, (days ~= 1 and "s") or "", hours, (hours ~= 1 and "s") or "",

		minutes, (minutes ~= 1 and "s") or "", os.date("%c", prosody.start_time));

end

function def_env.server:shutdown(reason)

	prosody.shutdown(reason);

	return true, "Shutdown initiated";

end

def_env.module = {};

local function get_hosts_set(hosts, module)

	if type(hosts) == "table" then

		if hosts[1] then

			return set.new(hosts);

		elseif hosts._items then

			return hosts;

		end

	elseif type(hosts) == "string" then

		return set.new { hosts };

	elseif hosts == nil then

		local mm = require "modulemanager";

		local hosts_set = set.new(array.collect(keys(prosody.hosts)))

			/ function (host) return prosody.hosts[host].type == "local" or module and mm.is_loaded(host, module); end;

		if module and mm.get_module("*", module) then

			hosts_set:add("*");

		end

		return hosts_set;

	end

end

function def_env.module:load(name, hosts, config)

	local mm = require "modulemanager";

	hosts = get_hosts_set(hosts);

	-- Load the module for each host

	for host in hosts do

		if (not mm.is_loaded(host, name)) then

				ok = false;

				self.session.print(err or "Unknown error loading module");

			else

				count = count + 1;

			end

		end

	end

	return ok, (ok and "Module loaded onto "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));	

end

function def_env.module:unload(name, hosts)

	local mm = require "modulemanager";

	hosts = get_hosts_set(hosts, name);

	-- Unload the module for each host

	local ok, err, count = true, nil, 0;

	for host in hosts do

		if mm.is_loaded(host, name) then

			ok, err = mm.unload(host, name);

			if not ok then

				ok = false;

				self.session.print(err or "Unknown error unloading module");

			else

				count = count + 1;

				self.session.print("Unloaded from "..host);

			end

		end

	end

	return ok, (ok and "Module unloaded from "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));

end

function def_env.module:reload(name, hosts)

	local mm = require "modulemanager";

	hosts = array.collect(get_hosts_set(hosts, name)):sort(function (a, b)

		if a == "*" then return true

		elseif b == "*" then return false

		else return a < b; end

	end);

	-- Reload the module for each host

	local ok, err, count = true, nil, 0;

	for _, host in ipairs(hosts) do

		if mm.is_loaded(host, name) then

			ok, err = mm.reload(host, name);

			if not ok then

				ok = false;

				self.session.print(err or "Unknown error reloading module");

			else

				count = count + 1;

				if ok == nil then

					ok = true;

				end

				self.session.print("Reloaded on "..host);

			end

		end

	end

	return ok, (ok and "Module reloaded on "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));

end