From 4196cca0e08cb9c3404f8b10db51714d1abc0286 Mon Sep 17 00:00:00 2001
From: Florian Zeitz <florob@babelmonkeys.de>
Date: Fri, 25 Jan 2013 01:32:14 +0100
Subject: mod_pubsub, util.pubsub: Don't send purge notifications in an
 <items/> element

---
 plugins/mod_pubsub.lua | 21 +++++++++++----------
 util/pubsub.lua        | 27 ++++++++++++++++++---------
 2 files changed, 29 insertions(+), 19 deletions(-)

diff --git a/plugins/mod_pubsub.lua b/plugins/mod_pubsub.lua
index c840c7c2..56fabaec 100644
--- a/plugins/mod_pubsub.lua
+++ b/plugins/mod_pubsub.lua
@@ -6,6 +6,7 @@ local uuid_generate = require "util.uuid".generate;
 local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
 local xmlns_pubsub_errors = "http://jabber.org/protocol/pubsub#errors";
 local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";
+local xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner";
 
 local autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
 local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
@@ -201,15 +202,12 @@ end
 function handlers.set_purge(origin, stanza, purge)
 	local node, notify = purge.attr.node, purge.attr.notify;
 	notify = (notify == "1") or (notify == "true");
-	local reply, notifier;
+	local reply;
 	if not node then
 		origin.send(st.error_reply(stanza, "modify", "bad-request"));
 		return true;
 	end
-	if notify then
-		notifier = st.stanza("purge");
-	end
-	local ok, ret = service:purge(node, stanza.attr.from, notifier);
+	local ok, ret = service:purge(node, stanza.attr.from, notify);
 	if ok then
 		reply = st.reply(stanza);
 	else
@@ -218,12 +216,14 @@ function handlers.set_purge(origin, stanza, purge)
 	return origin.send(reply);
 end
 
-function simple_broadcast(node, jids, item)
-	item = st.clone(item);
-	item.attr.xmlns = nil; -- Clear the pubsub namespace
+function simple_broadcast(kind, node, jids, item)
+	if item then
+		item = st.clone(item);
+		item.attr.xmlns = nil; -- Clear the pubsub namespace
+	end
 	local message = st.message({ from = module.host, type = "headline" })
 		:tag("event", { xmlns = xmlns_pubsub_event })
-			:tag("items", { node = node })
+			:tag(kind, { node = node })
 				:add_child(item);
 	for jid in pairs(jids) do
 		module:log("debug", "Sending notification to %s", jid);
@@ -232,7 +232,8 @@ function simple_broadcast(node, jids, item)
 	end
 end
 
-module:hook("iq/host/http://jabber.org/protocol/pubsub:pubsub", handle_pubsub_iq);
+module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
+module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
 
 local disco_info;
 
diff --git a/util/pubsub.lua b/util/pubsub.lua
index 17795cf1..c77140b9 100644
--- a/util/pubsub.lua
+++ b/util/pubsub.lua
@@ -245,7 +245,7 @@ function service:publish(node, actor, id, item)
 	end
 	node_obj.data[id] = item;
 	self.events.fire_event("item-published", { node = node, actor = actor, id = id, item = item });
-	self.config.broadcaster(node, node_obj.subscribers, item);
+	self.config.broadcaster("items", node, node_obj.subscribers, item);
 	return true;
 end
 
@@ -259,19 +259,28 @@ function service:retract(node, actor, id, retract)
 	if (not node_obj) or (not node_obj.data[id]) then
 		return false, "item-not-found";
 	end
-	if id then
-		node_obj.data[id] = nil;
-	else
-		node_obj.data = {}; -- Purge
-	end
+	node_obj.data[id] = nil;
 	if retract then
-		self.config.broadcaster(node, node_obj.subscribers, retract);
+		self.config.broadcaster("items", node, node_obj.subscribers, retract);
 	end
 	return true
 end
 
-function service:purge(node, actor, purge)
-	return self:retract(node, actor, nil, purge);
+function service:purge(node, actor, notify)
+	-- Access checking
+	if not self:may(node, actor, "retract") then
+		return false, "forbidden";
+	end
+	--
+	local node_obj = self.nodes[node];
+	if not node_obj then
+		return false, "item-not-found";
+	end
+	node_obj.data = {}; -- Purge
+	if notify then
+		self.config.broadcaster("purge", node, node_obj.subscribers);
+	end
+	return true
 end
 
 function service:get_items(node, actor, id)
-- 
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