-- mod_profile

local st = require"util.stanza";

local jid_split, jid_bare = import("util.jid", "split", "bare");

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

local vcard = require"util.vcard";

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

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

local t_insert, t_remove = table.insert, table.remove;

local pep_plus;

if module:get_host_type() == "local" and module:get_option_boolean("vcard_to_pep", true) then

	pep_plus = module:depends"pep_plus";

end

local loaded_pep_for = module:shared"loaded-pep-for";

local storage = module:open_store();

local legacy_storage = module:open_store("vcard");

local function get_item(vcard, name)

	local item;

	for i=1, #vcard do

		item=vcard[i];

		if item.name == name then

			return item, i;

		end

	end

end

local magic_mime = {

	["\137PNG\r\n\026\n"] = "image/png";

	["\255\216"] = "image/jpeg";

	["GIF87a"] = "image/gif";

	["GIF89a"] = "image/gif";

	["<?xml"] = "image/svg+xml";

}

local function identify(data)

	for magic, mime in pairs(magic_mime) do

		if data:sub(1, #magic) == magic then

			return mime;

		end

	end

	return "application/octet-stream";

end

local function update_pep(username, data)

	local pep = pep_plus.get_pep_service(username.."@"..module.host);

	local photo, p = get_item(data, "PHOTO");

	if vcard.to_vcard4 then

		if p then t_remove(data, p); end

		pep:purge("urn:xmpp:vcard4", true);

		pep:publish("urn:xmpp:vcard4", true, "current", st.stanza("item", {id="current"})

			:add_child(vcard.to_vcard4(data)));

		if p then t_insert(data, p, photo); end

	end

	local nickname = get_item(data, "NICKNAME");

	if nickname and nickname[1] then

		pep:purge("http://jabber.org/protocol/nick", true);

		pep:publish("http://jabber.org/protocol/nick", true, "current", st.stanza("item", {id="current"})

			:tag("nick", { xmlns="http://jabber.org/protocol/nick" }):text(nickname[1]));

	end

	if photo and photo[1] then

		local photo_raw = base64.decode(photo[1]);

		local photo_hash = sha1(photo_raw, true);

		pep:purge("urn:xmpp:avatar:metadata", true);

		pep:purge("urn:xmpp:avatar:data", true);

		pep:publish("urn:xmpp:avatar:metadata", true, "current", st.stanza("item", {id="current"})

			:tag("metadata", { xmlns="urn:xmpp:avatar:metadata" })

				:tag("info", {

					bytes = tostring(#photo_raw),

					id = photo_hash,

					type = identify(photo_raw),

				}));

		pep:publish("urn:xmpp:avatar:data", true, photo_hash, st.stanza("item", {id=photo_hash})

			:tag("data", { xmlns="urn:xmpp:avatar:data" }):text(photo[1]));

	end

end

-- The "temporary" vCard XEP-0054 part

module:add_feature("vcard-temp");

local function handle_get(event)

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

	local username = origin.username;

	local to = stanza.attr.to;

	if to then username = jid_split(to); end

	local data = storage:get(username);

	if not data then

		data = legacy_storage:get(username);

		data = data and st.deserialize(data);

		if data then

			return origin.send(st.reply(stanza):add_child(data));

		end

	end

	if not data then

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

	end

	return origin.send(st.reply(stanza):add_child(vcard.to_xep54(data)));

end

local function handle_set(event)

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

	local data = vcard.from_xep54(stanza.tags[1]);

	local username = origin.username;

	local to = stanza.attr.to;

	if to then

		if not is_admin(jid_bare(stanza.attr.from), module.host) then

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

		end

		username = jid_split(to);

	end

	local ok, err = storage:set(username, data);

	if not ok then

		return origin.send(st.error_reply(stanza, "cancel", "internal-server-error", err));

	end

	if pep_plus and username then

		update_pep(username, data);

		loaded_pep_for[username] = true;

	end

	return origin.send(st.reply(stanza));

end

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

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

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

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

module:hook("presence/initial", function (event)

	local username = event.origin.username

	if not loaded_pep_for[username] then

		if data then

			update_pep(username, data);

		end

		loaded_pep_for[username] = true;

	end

end);

-- The vCard4 part

if vcard.to_vcard4 then

	module:add_feature("urn:ietf:params:xml:ns:vcard-4.0");

	module:hook("iq-get/bare/urn:ietf:params:xml:ns:vcard-4.0:vcard", function(event)

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

		local username = jid_split(stanza.attr.to) or origin.username;

		local data = storage:get(username);

		if not data then

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

		end

		return origin.send(st.reply(stanza):add_child(vcard.to_vcard4(data)));

	end);

	if vcard.from_vcard4 then

		module:hook("iq-set/self/urn:ietf:params:xml:ns:vcard-4.0:vcard", function(event)

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

			local ok, err = storage:set(origin.username, vcard.from_vcard4(stanza.tags[1]));

			if not ok then

				return origin.send(st.error_reply(stanza, "cancel", "internal-server-error", err));

			end

			return origin.send(st.reply(stanza));

		end);

	else

		module:hook("iq-set/self/urn:ietf:params:xml:ns:vcard-4.0:vcard", function(event)

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

			return origin.send(st.error_reply(stanza, "cancel", "feature-not-implemented"));

		end);

	end

end