-- Prosody IM

-- Copyright (C) 2008-2010 Matthew Wild

-- Copyright (C) 2008-2010 Waqas Hussain

-- Copyright (C) 2018 Michel Le Bihan

--

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

local st = require "util.stanza"

local jid_split = require "util.jid".split;

local base64 = require"util.encodings".base64;

local sha1 = require"util.hashes".sha1;

local mod_muc = module:depends"muc";

local get_room_from_jid = mod_muc.get_room_from_jid;

local vcards = module:open_store();

module:add_feature("vcard-temp");

local function broadcast_presence(room_jid, to)

	local room = get_room_from_jid(room_jid);

	local room_node = jid_split(room_jid);

	local vcard = st.deserialize(vcards:get(room_node));

	local photo_hash;

	if vcard then

		local photo = vcard:get_child("PHOTO");

		if photo then

			local photo_b64 = photo:get_child_text("BINVAL");

			local photo_raw = photo_b64 and base64.decode(photo_b64);

			photo_hash = sha1(photo_raw, true);

		end

	end

	local presence_vcard = st.presence({to = to, from = room_jid})

		:tag("x", { xmlns = "vcard-temp:x:update" })

			:tag("photo"):text(photo_hash):up();

	if to == nil then

		room:broadcast_message(presence_vcard);

	else

		module:send(presence_vcard);

	end

end

local function handle_vcard(event)

	local session, stanza = event.origin, event.stanza;

	local room_jid = stanza.attr.to;

	local room_node = jid_split(room_jid);

	local room = get_room_from_jid(room_jid);

	local from = stanza.attr.from;

	local from_affiliation = room:get_affiliation(from);

	if stanza.attr.type == "get" then

		local vCard;

		vCard = st.deserialize(vcards:get(room_node));

		if vCard then

			session.send(st.reply(stanza):add_child(vCard)); -- send vCard!

		else

			session.send(st.error_reply(stanza, "cancel", "item-not-found"));

		end

	else

		if from_affiliation == "owner" then

			if vcards:set(room_node, st.preserialize(stanza.tags[1])) then

				session.send(st.reply(stanza):tag("vCard", { xmlns = "vcard-temp" }));

				broadcast_presence(room_jid, nil)

			else

				-- TODO unable to write file, file may be locked, etc, what's the correct error?

				session.send(st.error_reply(stanza, "wait", "internal-server-error"));

			end

		else

			session.send(st.error_reply(stanza, "auth", "forbidden"));

		end

	end

	return true;

end

module:hook("iq/bare/vcard-temp:vCard", handle_vcard);

module:hook("iq/host/vcard-temp:vCard", handle_vcard);

module:hook("muc-disco#info", function(event)

	event.reply:tag("feature", { var = "vcard-temp" }):up();

	broadcast_presence(event.room.jid, event.reply.attr.to);

end);