1 local jid = require "util.jid";

     2 local st = require "util.stanza";

     3 local datetime = require "util.datetime";

     4 

     5 local notify_unaffiliated_users = module:get_option("muc_rmn_notify_unaffiliated_users", false)

     6 

     7 local muc_affiliation_store = module:open_store("config", "map");

     8 

     9 local rmn_xmlns = "urn:xmpp:rmn:0";

    10 local reference_xmlns = "urn:xmpp:reference:0";

    11 local forwarded_xmlns = "urn:xmpp:forward:0";

    12 local deplay_xmlns = "urn:xmpp:delay";

    13 

    14 

    15 -- Returns a set of rooms the user is affiliated to

    16 local function get_user_rooms(user_bare_jid)

    17 	return muc_affiliation_store:get_all(user_bare_jid);

    18 end

    19 

    20 local function is_eligible(user_bare_jid, room)

    21 	if notify_unaffiliated_users then return true; end

    22 

    23 	local user_rooms, err = get_user_rooms(user_bare_jid);

    24 	if not user_rooms then

    25 		if err then

    26 			return false, err;

    27 		end

    28 		return false;

    29 	end

    30 

    31 	local room_node = jid.node(room.jid)

    32 	if user_rooms[room_node] then

    33 		return true;

    34 	end

    35 

    36 	return false

    37 end

    38 

    39 -- Send a single notification for a room, updating data structures as needed

    40 local function send_single_notification(user_bare_jid, room_jid, mention_stanza)

    41 	local notification = st.message({ to = user_bare_jid, from = module.host })

    42 		:tag("mentions", { xmlns = rmn_xmlns })

    43 		:tag("forwarded", {xmlns = forwarded_xmlns})

    44 		:tag("delay", {xmlns = deplay_xmlns, stamp = datetime.datetime()}):up()

    45 		:add_child(mention_stanza)

    46 		:reset();

    47 	module:log("debug", "Sending mention notification from %s to %s", room_jid, user_bare_jid);

    48 	return module:send(notification);

    49 end

    50 

    51 local function notify_mentioned_users(room, client_mentions, mention_stanza)

    52 	module:log("debug", "NOTIFYING FOR %s", room.jid)

    53 	for user_bare_jid in pairs(client_mentions) do

    54 		if is_eligible(user_bare_jid, room) then

    55 			send_single_notification(user_bare_jid, room.jid, mention_stanza);

    56 		end

    57 	end

    58 end

    59 

    60 local function get_mentions(stanza)

    61 	local has_mentions = false

    62 	local client_mentions = {}

    63 

    64 	for element in stanza:childtags("reference", reference_xmlns) do

    65 		if element.attr.type == "mention" then

    66 			local user_bare_jid = element.attr.uri:match("^xmpp:(.+)$");

    67 			if user_bare_jid then

    68 				client_mentions[user_bare_jid] = user_bare_jid;

    69 				has_mentions = true

    70 			end

    71 		end

    72 	end

    73 

    74 	return has_mentions, client_mentions

    75 end

    76 

    77 module:hook("muc-broadcast-message", function (event)

    78 	local room, stanza = event.room, event.stanza;

    79 	local body = stanza:get_child_text("body")

    80 	if not body or #body < 1 then return; end

    81 	local correction = stanza:get_child("replace", "urn:xmpp:message-correct:0");

    82 	if correction then return; end -- Do not notify on message corrections

    83 

    84 	local has_mentions, client_mentions = get_mentions(stanza)

    85 	if not has_mentions then return; end

    86 

    87 	-- Notify any users that need to be notified

    88 	notify_mentioned_users(room, client_mentions, stanza);

    89 end, -1);