-- 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 st, jid = require "util.stanza", require "util.jid";

local hosts = prosody.hosts;

local is_admin = require "core.usermanager".is_admin;

function send_to_online(message, host)

	local sessions;

	if host then

		sessions = { [host] = hosts[host] };

	else

		sessions = hosts;

	end

	local c = 0;

	for hostname, host_session in pairs(sessions) do

		if host_session.sessions then

			message.attr.from = hostname;

			for username in pairs(host_session.sessions) do

				c = c + 1;

				message.attr.to = username.."@"..hostname;

				module:send(message);

			end

		end

	end

	return c;

end

-- Old <message>-based jabberd-style announcement sending

function handle_announcement(event)

	local stanza = event.stanza;

	local node, host, resource = jid.split(stanza.attr.to);

	if resource ~= "announce/online" then

		return; -- Not an announcement

	end

	if not is_admin(stanza.attr.from) then

		-- Not an admin? Not allowed!

		module:log("warn", "Non-admin '%s' tried to send server announcement", stanza.attr.from);

		return;

	end

	module:log("info", "Sending server announcement to all online users");

	local message = st.clone(stanza);

	message.attr.type = "headline";

	message.attr.from = host;

	local c = send_to_online(message, host);

	module:log("info", "Announcement sent to %d online users", c);

	return true;

end

module:hook("message/host", handle_announcement);

-- Ad-hoc command (XEP-0133)

local dataforms_new = require "util.dataforms".new;

local announce_layout = dataforms_new{

	title = "Making an Announcement";

	instructions = "Fill out this form to make an announcement to all\nactive users of this service.";

	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };

	{ name = "subject", type = "text-single", label = "Subject" };

	{ name = "announcement", type = "text-multi", required = true, label = "Announcement" };

};

function announce_handler(_, data, state)

	if state then

		if data.action == "cancel" then

			return { status = "canceled" };

		end

		local fields = announce_layout:data(data.form);

		module:log("info", "Sending server announcement to all online users");

		local message = st.message({type = "headline"}, fields.announcement):up()

			:tag("subject"):text(fields.subject or "Announcement");

		local count = send_to_online(message, data.to);

		module:log("info", "Announcement sent to %d online users", count);

		return { status = "completed", info = ("Announcement sent to %d online users"):format(count) };

	else

		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = announce_layout }, "executing";

	end

end

module:depends "adhoc";

local adhoc_new = module:require "adhoc".new;

local announce_desc = adhoc_new("Send Announcement to Online Users", "http://jabber.org/protocol/admin#announce", announce_handler, "admin");

module:provides("adhoc", announce_desc);