Changeset

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_mam_muc/mod_mam_muc.lua	Mon Sep 17 20:14:51 2012 +0200
@@ -0,0 +1,211 @@
+-- XEP-0313: Message Archive Management for Prosody
+-- Copyright (C) 2011-2012 Kim Alvefur
+--
+-- 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 jid_prep = require "util.jid".prep;
+local host = module.host;
+
+local dm_list_load = require "util.datamanager".list_load;
+local dm_list_append = require "util.datamanager".list_append;
+
+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 uuid = require "util.uuid".generate;
+local default_max_items, max_max_items = 20, module:get_option_number("max_archive_query_results", 50);
+--local rooms_to_archive = module:get_option_set("rooms_to_archive",{});
+-- TODO Should be possible to enforce it too
+
+local archive_store = "archive2";
+
+-- Handle archive queries
+module:hook("iq/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 = hosts[module.host].modules.muc.rooms[jid_bare(stanza.attr.to)];
+	if not room_obj then
+		return -- FIXME not found
+	end
+	local from = jid_bare(stanza.attr.from);
+
+	if room_obj._affiliations[from] == "outcast"
+		or room_obj._data.members_only and not room_obj._affiliations[from] then
+		return -- FIXME unauth
+	end
+
+	if stanza.attr.type == "get" then
+		local qid = query.attr.queryid;
+
+		-- Search query parameters
+		local qwith = query:get_child_text("with");
+		local qstart = query:get_child_text("start");
+		local qend = query:get_child_text("end");
+		local qset = rsm.get(query);
+		module:log("debug", "Archive query, id %s with %s from %s until %s)",
+			tostring(qid), qwith or "anyone", qstart or "the dawn of time", qend or "now");
+
+		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
+
+		local qres;
+		if qwith then -- Validate the 'with' jid
+			local pwith = qwith and jid_prep(qwith);
+			if pwith and not qwith then -- it failed prepping
+				origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid JID"))
+				return true
+			end
+			local _, _, resource = jid_split(qwith);
+			qwith = jid_bare(pwith);
+			qres = resource;
+		end
+
+		-- Load all the data!
+		local data, err = dm_list_load(room, module.host, archive_store);
+		if not data then
+			if (not err) then
+				module:log("debug", "The archive was empty.");
+				origin.send(st.reply(stanza));
+			else
+				origin.send(st.error_reply(stanza, "cancel", "internal-server-error", "Error loading archive: "..tostring(err)));
+			end
+			return true
+		end
+
+		-- RSM stuff
+		local qmax = m_min(qset and qset.max or default_max_items, max_max_items);
+		local qset_matches = not (qset and qset.after);
+		local first, last, index;
+		local n = 0;
+		local start = qset and qset.index or 1;
+
+		module:log("debug", "Loaded %d items, about to filter", #data);
+		for i=start,#data do
+			local item = data[i];
+			local when, nick = item.when, item.resource;
+			local id = item.id;
+			--module:log("debug", "id is %s", id);
+
+			-- RSM pre-send-checking
+			if qset then
+				if qset.before == id then
+					module:log("debug", "End of matching range found");
+					qset_matches = false;
+					break;
+				end
+			end
+
+			--module:log("debug", "message with %s at %s", with, when or "???");
+			-- Apply query filter
+			if (not qres or (qres == nick))
+					and (not qstart or when >= qstart)
+					and (not qend or when <= qend)
+					and (not qset or qset_matches) then
+				local fwd_st = st.message{ to = stanza.attr.from }
+					:tag("result", { xmlns = xmlns_mam, queryid = qid, id = id }):up()
+					:tag("forwarded", { xmlns = xmlns_forward })
+						:tag("delay", { xmlns = xmlns_delay, stamp = timestamp(when) }):up();
+				local orig_stanza = st.deserialize(item.stanza);
+				orig_stanza.attr.xmlns = "jabber:client";
+				fwd_st:add_child(orig_stanza);
+				origin.send(fwd_st);
+				if not first then
+					index = i;
+					first = id;
+				end
+				last = id;
+				n = n + 1;
+			elseif (qend and when > qend) then
+				module:log("debug", "We have passed into messages more recent than requested");
+				break -- We have passed into messages more recent than requested
+			end
+
+			-- RSM post-send-checking
+			if qset then
+				if qset.after == id then
+					module:log("debug", "Start of matching range found");
+					qset_matches = true;
+				end
+			end
+			if n >= qmax then
+				module:log("debug", "Max number of items matched");
+				break
+			end
+		end
+		-- That's all folks!
+		module:log("debug", "Archive query %s completed", tostring(qid));
+
+		local reply = st.reply(stanza);
+		if last then
+			-- This is a bit redundant, isn't it?
+			reply:query(xmlns_mam):add_child(rsm.generate{first = first, last = last, count = n});
+		end
+		origin.send(reply);
+		return true
+	end
+end);
+
+-- Handle messages
+local function message_handler(event)
+	local origin, stanza = event.origin, event.stanza;
+	local orig_type = stanza.attr.type or "normal";
+	local orig_to = stanza.attr.to;
+	local orig_from = stanza.attr.from;
+
+	-- Still needed?
+	if not orig_from then
+		orig_from = origin.full_jid;
+	end
+
+	-- 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 room_obj = hosts[host].modules.muc.rooms[orig_to]
+	if not room_obj then return end
+
+	local id = uuid();
+	local when = time_now();
+	local stanza = st.clone(stanza); -- Private copy
+	--stanza.attr.to = nil;
+	local nick = room_obj._jid_nick[orig_from];
+	if not nick then return end
+	stanza.attr.from = nick;
+	local _, _, nick = jid_split(nick);
+	-- And stash it
+	local ok, err = dm_list_append(room, host, archive_store, {
+		-- WARNING This format may change.
+		id = id,
+		when = when,
+		resource = nick,
+		stanza = st.preserialize(stanza)
+	});
+	--[[ This was dropped from the spec
+	if ok then 
+		stanza:tag("archived", { xmlns = xmlns_mam, by = host, id = id }):up();
+	end
+	--]]
+end
+
+module:hook("message/bare", message_handler, 2);
+
+module:add_feature(xmlns_mam);