local st = require "util.stanza"

local send = require "core.sessionmanager".send_to_session

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

local datamanager = require "util.datamanager"

add_iq_handler("c2s", "jabber:iq:private",

	function (session, stanza)

		local type = stanza.attr.type;

		local query = stanza.tags[1];

		if (type == "get" or type == "set") and query.name == "query" then

			local node, host = jid_split(stanza.attr.to);

			if not(node or host) or (node == session.username and host == session.host) then

				node, host = session.username, session.host;

				if #query.tags == 1 then

					local tag = query.tags[1];

					local key = tag.name..":"..tag.attr.xmlns;

					local data = datamanager.load(node, host, "private");

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

						if data and data[key] then

							send(session, st.reply(stanza):tag("query", {xmlns = "jabber:iq:private"}):add_child(st.deserialize(data[key])));

						else

							send(session, st.reply(stanza):add_child(stanza.tags[1]));

						end

					else -- set

						if not data then data = {}; end;

						if #tag == 0 then

							data[key] = nil;

						else

							data[key] = st.preserialize(tag);

						end

						-- TODO delete datastore if empty

						if datamanager.store(node, host, "private", data) then

							send(session, st.reply(stanza));

						else

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

						end

					end

				else

					send(session, st.error_reply(stanza, "modify", "bad-format"));

				end

			else

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

			end

		end

	end);