diff options
Diffstat (limited to 'util/pubsub.lua')
| -rw-r--r-- | util/pubsub.lua | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/util/pubsub.lua b/util/pubsub.lua index 424a48c6..2f8525b6 100644 --- a/util/pubsub.lua +++ b/util/pubsub.lua @@ -12,6 +12,7 @@ local default_config = { __index = { capabilities = {}; } }; local default_node_config = { __index = { + ["pubsub#max_items"] = "20"; } }; function new(config) @@ -262,6 +263,14 @@ local function remove_item_by_id(data, id) end end +local function trim_items(data, max) + max = tonumber(max); + if not max or #data <= max then return end + repeat + data[t_remove(data, 1)] = nil; + until #data <= max +end + function service:publish(node, actor, id, item) -- Access checking if not self:may(node, actor, "publish") then @@ -283,6 +292,7 @@ function service:publish(node, actor, id, item) remove_item_by_id(node_data, id); node_data[#node_data + 1] = id; node_data[id] = item; + trim_items(node_data, node_obj.config["pubsub#max_items"]); 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; @@ -427,6 +437,7 @@ function service:set_node_config(node, actor, new_config) for k,v in pairs(new_config) do node_obj.config[k] = v; end + trim_items(self.data[node], node_obj.config["pubsub#max_items"]); return true; end |