mod_pubsub: Split out handlers into a module library

1 files changed, 251 insertions, 0 deletions

diff --git a/plugins/mod_pubsub/mod_pubsub.lua b/plugins/mod_pubsub/mod_pubsub.lua
new file mode 100644
index 00000000..ad20c6a7
--- /dev/null
+++ b/plugins/mod_pubsub/mod_pubsub.lua
@@ -0,0 +1,251 @@
+local pubsub = require "util.pubsub";
+local st = require "util.stanza";
+local jid_bare = require "util.jid".bare;
+local usermanager = require "core.usermanager";
+
+local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
+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);
+local pubsub_disco_name = module:get_option("name");
+if type(pubsub_disco_name) ~= "string" then pubsub_disco_name = "Prosody PubSub Service"; end
+
+local service;
+
+local lib_pubsub = module:require "pubsub";
+local handlers = lib_pubsub.handlers;
+local pubsub_error_reply = lib_pubsub.pubsub_error_reply;
+
+function handle_pubsub_iq(event)
+	local origin, stanza = event.origin, event.stanza;
+	local pubsub = stanza.tags[1];
+	local action = pubsub.tags[1];
+	if not action then
+		return origin.send(st.error_reply(stanza, "cancel", "bad-request"));
+	end
+	local handler = handlers[stanza.attr.type.."_"..action.name];
+	if handler then
+		handler(origin, stanza, action, service);
+		return true;
+	end
+end
+
+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(kind, { node = node })
+				:add_child(item);
+	for jid in pairs(jids) do
+		module:log("debug", "Sending notification to %s", jid);
+		message.attr.to = jid;
+		module:send(message);
+	end
+end
+
+module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
+module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
+
+local disco_info;
+
+local feature_map = {
+	create = { "create-nodes", "instant-nodes", "item-ids" };
+	retract = { "delete-items", "retract-items" };
+	purge = { "purge-nodes" };
+	publish = { "publish", autocreate_on_publish and "auto-create" };
+	delete = { "delete-nodes" };
+	get_items = { "retrieve-items" };
+	add_subscription = { "subscribe" };
+	get_subscriptions = { "retrieve-subscriptions" };
+};
+
+local function add_disco_features_from_service(disco, service)
+	for method, features in pairs(feature_map) do
+		if service[method] then
+			for _, feature in ipairs(features) do
+				if feature then
+					disco:tag("feature", { var = xmlns_pubsub.."#"..feature }):up();
+				end
+			end
+		end
+	end
+	for affiliation in pairs(service.config.capabilities) do
+		if affiliation ~= "none" and affiliation ~= "owner" then
+			disco:tag("feature", { var = xmlns_pubsub.."#"..affiliation.."-affiliation" }):up();
+		end
+	end
+end
+
+local function build_disco_info(service)
+	local disco_info = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" })
+		:tag("identity", { category = "pubsub", type = "service", name = pubsub_disco_name }):up()
+		:tag("feature", { var = "http://jabber.org/protocol/pubsub" }):up();
+	add_disco_features_from_service(disco_info, service);
+	return disco_info;
+end
+
+module:hook("iq-get/host/http://jabber.org/protocol/disco#info:query", function (event)
+	local origin, stanza = event.origin, event.stanza;
+	local node = stanza.tags[1].attr.node;
+	if not node then
+		return origin.send(st.reply(stanza):add_child(disco_info));
+	else
+		local ok, ret = service:get_nodes(stanza.attr.from);
+		if ok and not ret[node] then
+			ok, ret = false, "item-not-found";
+		end
+		if not ok then
+			return origin.send(pubsub_error_reply(stanza, ret));
+		end
+		local reply = st.reply(stanza)
+			:tag("query", { xmlns = "http://jabber.org/protocol/disco#info", node = node })
+				:tag("identity", { category = "pubsub", type = "leaf" });
+		return origin.send(reply);
+	end
+end);
+
+local function handle_disco_items_on_node(event)
+	local stanza, origin = event.stanza, event.origin;
+	local query = stanza.tags[1];
+	local node = query.attr.node;
+	local ok, ret = service:get_items(node, stanza.attr.from);
+	if not ok then
+		return origin.send(pubsub_error_reply(stanza, ret));
+	end
+
+	local reply = st.reply(stanza)
+		:tag("query", { xmlns = "http://jabber.org/protocol/disco#items", node = node });
+
+	for id, item in pairs(ret) do
+		reply:tag("item", { jid = module.host, name = id }):up();
+	end
+
+	return origin.send(reply);
+end
+
+
+module:hook("iq-get/host/http://jabber.org/protocol/disco#items:query", function (event)
+	if event.stanza.tags[1].attr.node then
+		return handle_disco_items_on_node(event);
+	end
+	local ok, ret = service:get_nodes(event.stanza.attr.from);
+	if not ok then
+		event.origin.send(pubsub_error_reply(event.stanza, ret));
+	else
+		local reply = st.reply(event.stanza)
+			:tag("query", { xmlns = "http://jabber.org/protocol/disco#items" });
+		for node, node_obj in pairs(ret) do
+			reply:tag("item", { jid = module.host, node = node, name = node_obj.config.name }):up();
+		end
+		event.origin.send(reply);
+	end
+	return true;
+end);
+
+local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
+local function get_affiliation(jid)
+	local bare_jid = jid_bare(jid);
+	if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
+		return admin_aff;
+	end
+end
+
+function set_service(new_service)
+	service = new_service;
+	module.environment.service = service;
+	disco_info = build_disco_info(service);
+end
+
+function module.save()
+	return { service = service };
+end
+
+function module.restore(data)
+	set_service(data.service);
+end
+
+set_service(pubsub.new({
+	capabilities = {
+		none = {
+			create = false;
+			publish = false;
+			retract = false;
+			get_nodes = true;
+
+			subscribe = true;
+			unsubscribe = true;
+			get_subscription = true;
+			get_subscriptions = true;
+			get_items = true;
+
+			subscribe_other = false;
+			unsubscribe_other = false;
+			get_subscription_other = false;
+			get_subscriptions_other = false;
+
+			be_subscribed = true;
+			be_unsubscribed = true;
+
+			set_affiliation = false;
+		};
+		publisher = {
+			create = false;
+			publish = true;
+			retract = true;
+			get_nodes = true;
+
+			subscribe = true;
+			unsubscribe = true;
+			get_subscription = true;
+			get_subscriptions = true;
+			get_items = true;
+
+			subscribe_other = false;
+			unsubscribe_other = false;
+			get_subscription_other = false;
+			get_subscriptions_other = false;
+
+			be_subscribed = true;
+			be_unsubscribed = true;
+
+			set_affiliation = false;
+		};
+		owner = {
+			create = true;
+			publish = true;
+			retract = true;
+			delete = true;
+			get_nodes = true;
+
+			subscribe = true;
+			unsubscribe = true;
+			get_subscription = true;
+			get_subscriptions = true;
+			get_items = true;
+
+
+			subscribe_other = true;
+			unsubscribe_other = true;
+			get_subscription_other = true;
+			get_subscriptions_other = true;
+
+			be_subscribed = true;
+			be_unsubscribed = true;
+
+			set_affiliation = true;
+		};
+	};
+
+	autocreate_on_publish = autocreate_on_publish;
+	autocreate_on_subscribe = autocreate_on_subscribe;
+
+	broadcaster = simple_broadcast;
+	get_affiliation = get_affiliation;
+
+	normalize_jid = jid_bare;
+}));