-- XEP-0313: Message Archive Management for Prosody

--

-- This file is MIT/X11 licensed.

local xmlns_mam     = "urn:xmpp:mam:tmp";

local xmlns_delay   = "urn:xmpp:delay";

local xmlns_forward = "urn:xmpp:forward:0";

local st = require "util.stanza";

local rsm = module:require "mod_mam/rsm";

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

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

local tostring = tostring;

local time_now = os.time;

local m_min = math.min;

local timestamp, timestamp_parse = require "util.datetime".datetime, require "util.datetime".parse;

local default_max_items, max_max_items = 20, module:get_option_number("max_archive_query_results", 50);

local rooms = hosts[module.host].modules.muc.rooms;

-- Handle archive queries

module:hook("iq-get/bare/"..xmlns_mam..":query", function(event)

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

	local room = jid_split(stanza.attr.to);

	local query = stanza.tags[1];

	local room_obj = rooms[room];

	if not room_obj then

		return -- FIXME not found

	end

	local from = jid_bare(stanza.attr.from);

	-- Banned or not a member of a members-only room?

	if room_obj._affiliations[from] == "outcast"

		or room_obj._data.members_only and not room_obj._affiliations[from] then

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

	end

	local qid = query.attr.queryid;

	-- Search query parameters

	local qstart = query:get_child_text("start");

	local qend = query:get_child_text("end");

	if qstart or qend then -- Validate timestamps

		local vstart, vend = (qstart and timestamp_parse(qstart)), (qend and timestamp_parse(qend))

		if (qstart and not vstart) or (qend and not vend) then

			origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid timestamp"))

			return true

		end

		qstart, qend = vstart, vend;

	end

	-- Load all the data!

				:tag("forwarded", { xmlns = xmlns_forward })

					:tag("delay", { xmlns = xmlns_delay, stamp = timestamp(when) }):up();

		end

	end

	-- That's all folks!

	module:log("debug", "Archive query %s completed", tostring(qid));

end);

-- Handle messages

local function message_handler(event)

	local orig_type = stanza.attr.type or "normal";

	local orig_to = stanza.attr.to;

	local orig_from = stanza.attr.from;

	-- Only store groupchat messages

	if not (orig_type == "groupchat" and (stanza:get_child("body") or stanza:get_child("subject"))) then

		return;

	end

	local room = jid_split(orig_to);

	local nick = room_obj._jid_nick[orig_from];

	stanza.attr.from = nick;

	-- And stash it

end

module:hook("message/bare", message_handler, 2);

module:add_feature(xmlns_mam);