mod_pep: Revert 045209b41b3a, caused a regression

Adding in all presence based subscriptions in the broadcaster caused
resend_last_item() to unintentionally send out more notifications than
it should have.

plugins/mod_pep.lua

@@ -90,6 +90,21 @@ local function nodestore(username)
 		return data, err;
 	end
 	function store:set(node, data)
+		if data then
+			-- Save the data without subscriptions
+			local subscribers = {};
+			for jid, sub in pairs(data.subscribers) do
+				if type(sub) ~= "table" or not sub.presence then
+					subscribers[jid] = sub;
+				end
+			end
+			data = {
+				name = data.name;
+				config = data.config;
+				affiliations = data.affiliations;
+				subscribers = subscribers;
+			};
+		end
 		return node_config:set(username, node, data);
 	end
 	function store:users()
@@ -136,23 +151,7 @@ local function get_broadcaster(username)
 			end
 			message:add_child(item);
 		end
-
-		local broadcast_to = {};
 		for jid in pairs(jids) do
-			broadcast_to[jid] = true;
-		end
-
-		local service_recipients = recipients[username];
-		if service_recipients then
-			local service = services[username];
-			for recipient, nodes in pairs(service_recipients) do
-				if nodes:contains(node) and service:may(node, recipient, "subscribe") then
-					broadcast_to[recipient] = true;
-				end
-			end
-		end
-
-		for jid in pairs(broadcast_to) do
 			module:log("debug", "Sending notification to %s from %s: %s", jid, user_bare, tostring(item));
 			message.attr.to = jid;
 			module:send(message);
@@ -161,6 +160,20 @@ local function get_broadcaster(username)
 	return simple_broadcast;
 end
 
+local function on_node_creation(event)
+	local service = event.service;
+	local node = event.node;
+	local username = service.config.pep_username;
+
+	local service_recipients = recipients[username];
+	if not service_recipients then return; end
+
+	for recipient, nodes in pairs(service_recipients) do
+		if nodes:contains(node) then
+			service:add_subscription(node, recipient, recipient, { presence = true });
+		end
+	end
+end
 
 function get_pep_service(username)
 	module:log("debug", "get_pep_service(%q)", username);
@@ -220,6 +233,10 @@ function get_pep_service(username)
 	return service;
 end
 
+module:hook("item-added/pep-service", function (event)
+	local service = event.item.service;
+	module:hook_object_event(service.events, "node-created", on_node_creation);
+end);
 
 function handle_pubsub_iq(event)
 	local origin, stanza = event.origin, event.stanza;
@@ -286,9 +303,12 @@ local function update_subscriptions(recipient, service_name, nodes)
 	end
 
 	local service = get_pep_service(service_name);
+	for node in current - nodes do
+		service:remove_subscription(node, recipient, recipient);
+	end
 
 	for node in nodes - current do
-		if service:may(node, recipient, "subscribe") then
+		if service:add_subscription(node, recipient, recipient, { presence = true }) then
 			resend_last_item(recipient, node, service);
 		end
 	end