Diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_cloud_notify/mod_cloud_notify.lua	Mon Aug 24 23:17:36 2015 +0200
@@ -0,0 +1,100 @@
+-- XEP-0357: Push (aka: My mobile OS vendor won't let me have persistent TCP connections)
+-- Copyright (C) 2015 Kim Alvefur
+--
+-- This file is MIT/X11 licensed.
+
+local st = require"util.stanza";
+local jid = require"util.jid";
+local dataform = require"util.dataforms".new;
+
+local xmlns_push = "urn:xmpp:push:0";
+
+module:add_feature(xmlns_push);
+
+local push_enabled = module:shared("push-enabled-users");
+
+module:hook("iq-set/self/"..xmlns_push..":enable", function (event)
+	local origin, stanza = event.origin, event.stanza;
+	local push_jid, push_node = stanza.tags[1].attr.jid, stanza.tags[1].attr.node;
+	if not push_jid or not push_node then
+		origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing jid or node"));
+		return true;
+	end
+	local publish_options = stanza.tags[1].tags[1];
+	if publish_options and ( publish_options.name ~= "x" or publish_options.attr.xmlns ~= "jabber:x:data" ) then
+		origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid publish options"));
+		return true;
+	end
+	local user_push_services = push_enabled[origin.username];
+	if not user_push_services then
+		user_push_services = {};
+	end
+	user_push_services[push_jid .. "<" .. push_node] = {
+		jid = push_jid;
+		node = push_node;
+		count = 0;
+		options = publish_options;
+	};
+	origin.send(st.reply(stanza));
+	return true;
+end);
+
+module:hook("iq-set/self/"..xmlns_push..":disable", function (event)
+	local origin, stanza = event.origin, event.stanza;
+	local push_jid, push_node = stanza.tags[1].attr.jid, stanza.tags[1].attr.node;
+	if not push_jid or not push_node then
+		origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing jid or node"));
+		return true;
+	end
+	local user_push_services = push_enabled[origin.username];
+	if user_push_services then
+		user_push_services[push_jid .. "<" .. push_node] = nil;
+	end
+	origin.send(st.reply(stanza));
+	return true;
+end);
+
+local push_form = dataform {
+	{ name = "FORM_TYPE"; type = "hidden"; value = "urn:xmpp:push:summary"; };
+	{ name = "message-count"; type = "text-single"; };
+	{ name = "pending-subscription-count"; type = "text-single"; };
+	{ name = "last-message-sender"; type = "jid-single"; };
+	{ name = "last-message-body"; type = "text-single"; };
+};
+
+module:hook("message/offline/handle", function(event)
+	local origin, stanza = event.origin, event.stanza;
+	local to = stanza.attr.to;
+	local node = to and jid.split(to) or origin.username;
+	local user_push_services = push_enabled[node];
+	if not user_push_services then return end
+
+	for _, push_info in pairs(user_push_services) do
+		push_info.count = push_info.count + 1;
+		local push_jid, push_node = push_info.jid, push_info.node;
+		local push_publish = st.iq({ to = push_jid, from = module.host, type = "set", id = "push" })
+			:tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
+				:tag("publish", { node = push_node });
+		push_publish:add_child(push_form:form({
+			["message-count"] = tostring(push_info.count);
+			["last-message-sender"] = stanza.attr.from;
+			["last-message-body"] = stanza:get_child_text("body");
+		}));
+		push_publish:up(); -- / publish
+		if push_info.options then
+			push_publish:tag("publish-options"):add_child(push_info.options);
+		end
+		module:send(push_publish);
+	end
+end, 1);
+
+module:hook("message/offline/broadcast", function(event)
+	local user_push_services = push_enabled[event.origin.username];
+	if not user_push_services then return end
+
+	for _, push_info in pairs(user_push_services) do
+		if push_info then
+			push_info.count = 0;
+		end
+	end
+end, 1);