util.pubsub: Separate data from node configuration

1 files changed, 26 insertions, 7 deletions

diff --git a/util/pubsub.lua b/util/pubsub.lua
index a68b256c..fc67cb1f 100644
--- a/util/pubsub.lua
+++ b/util/pubsub.lua
@@ -1,4 +1,5 @@
 local events = require "util.events";
+local t_remove = table.remove;
 
 module("pubsub", package.seeall);
 
@@ -18,6 +19,7 @@ function new(config)
 		affiliations = {};
 		subscriptions = {};
 		nodes = {};
+		data = {};
 		events = events.new();
 	}, service_mt);
 end
@@ -212,17 +214,19 @@ function service:create(node, actor)
 		return false, "conflict";
 	end
 
+	self.data[node] = {};
 	self.nodes[node] = {
 		name = node;
 		subscribers = {};
 		config = {};
-		data = {};
 		affiliations = {};
 	};
+	setmetatable(self.nodes[node], { __index = { data = self.data[node] } }); -- COMPAT
 	self.events.fire_event("node-created", { node = node, actor = actor });
 	local ok, err = self:set_affiliation(node, true, actor, "owner");
 	if not ok then
 		self.nodes[node] = nil;
+		self.data[node] = nil;
 	end
 	return ok, err;
 end
@@ -238,11 +242,23 @@ function service:delete(node, actor)
 		return false, "item-not-found";
 	end
 	self.nodes[node] = nil;
+	self.data[node] = nil;
 	self.events.fire_event("node-deleted", { node = node, actor = actor });
 	self.config.broadcaster("delete", node, node_obj.subscribers);
 	return true;
 end
 
+local function remove_item_by_id(data, id)
+	if not data[id] then return end
+	data[id] = nil;
+	for i, _id in ipairs(data) do
+		if id == _id then
+			t_remove(data, i);
+			return i;
+		end
+	end
+end
+
 function service:publish(node, actor, id, item)
 	-- Access checking
 	if not self:may(node, actor, "publish") then
@@ -260,7 +276,10 @@ function service:publish(node, actor, id, item)
 		end
 		node_obj = self.nodes[node];
 	end
-	node_obj.data[id] = item;
+	local node_data = self.data[node];
+	remove_item_by_id(node_data, id);
+	node_data[#self.data[node] + 1] = id;
+	node_data[id] = item;
 	self.events.fire_event("item-published", { node = node, actor = actor, id = id, item = item });
 	self.config.broadcaster("items", node, node_obj.subscribers, item);
 	return true;
@@ -273,11 +292,11 @@ function service:retract(node, actor, id, retract)
 	end
 	--
 	local node_obj = self.nodes[node];
-	if (not node_obj) or (not node_obj.data[id]) then
+	if (not node_obj) or (not self.data[node][id]) then
 		return false, "item-not-found";
 	end
 	self.events.fire_event("item-retracted", { node = node, actor = actor, id = id });
-	node_obj.data[id] = nil;
+	remove_item_by_id(self.data[node], id);
 	if retract then
 		self.config.broadcaster("items", node, node_obj.subscribers, retract);
 	end
@@ -294,7 +313,7 @@ function service:purge(node, actor, notify)
 	if not node_obj then
 		return false, "item-not-found";
 	end
-	node_obj.data = {}; -- Purge
+	self.data[node] = {}; -- Purge
 	self.events.fire_event("node-purged", { node = node, actor = actor });
 	if notify then
 		self.config.broadcaster("purge", node, node_obj.subscribers);
@@ -313,9 +332,9 @@ function service:get_items(node, actor, id)
 		return false, "item-not-found";
 	end
 	if id then -- Restrict results to a single specific item
-		return true, { [id] = node_obj.data[id] };
+		return true, { id, [id] = self.data[node][id] };
 	else
-		return true, node_obj.data;
+		return true, self.data[node];
 	end
 end