2 local ipairs, pairs, setmetatable, type =
3 ipairs, pairs, setmetatable, type;
7 local pubsub_node_mt = { __index = _M };
9 function new_node(name)
10 return setmetatable({ name = name, subscribers = {} }, pubsub_node_mt);
13 function set_subscribers(node, subscribers_list, list_type)
14 local subscribers = node.subscribers;
16 if list_type == "array" then
17 for _, jid in ipairs(subscribers_list) do
18 if not subscribers[jid] then
19 node:add_subscriber(jid);
22 elseif (not list_type) or list_type == "set" then
23 for jid in pairs(subscribers_list) do
24 if type(jid) == "string" then
25 node:add_subscriber(jid);
31 function get_subscribers(node)
32 return node.subscribers;
35 function publish(node, item, dispatcher, data)
36 local subscribers = node.subscribers;
37 for i = 1,#subscribers do
38 item.attr.to = subscribers[i];
39 dispatcher(data, item);
43 function add_subscriber(node, jid)
44 local subscribers = node.subscribers;
45 if not subscribers[jid] then
46 local space = #subscribers;
47 subscribers[space] = jid;
48 subscribers[jid] = space;
52 function remove_subscriber(node, subscriber)
53 local subscribers = node.subscribers;
54 if subscribers[jid] then
55 subscribers[subscribers[jid]] = nil;
56 subscribers[jid] = nil;