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module("pubsub", package.seeall);
local service = {};
local service_mt = { __index = service };
function new(cb)
return setmetatable({ cb = cb or {}, nodes = {} }, service_mt);
end
function service:add_subscription(node, actor, jid)
local node_obj = self.nodes[node];
if not node_obj then
return false, "item-not-found";
end
node_obj.subscribers[jid] = true;
return true;
end
function service:remove_subscription(node, actor, jid)
local node_obj = self.nodes[node];
if not node_obj then
return false, "item-not-found";
end
if not node_obj.subscribers[jid] then
return false, "not-subscribed";
end
node_obj.subscribers[jid] = nil;
return true;
end
function service:get_subscription(node, actor, jid)
local node_obj = self.nodes[node];
if node_obj then
return node_obj.subscribers[jid];
end
end
function service:create(node, actor)
if not self.nodes[node] then
self.nodes[node] = { name = node, subscribers = {}, config = {}, data = {} };
return true;
end
return false, "conflict";
end
function service:publish(node, actor, id, item)
local node_obj = self.nodes[node];
if not node_obj then
node_obj = { name = node, subscribers = {}, config = {}, data = {} };
self.nodes[node] = node_obj;
end
node_obj.data[id] = item;
self.cb.broadcaster(node, node_obj.subscribers, item);
return true;
end
function service:retract(node, actor, id, retract)
local node_obj = self.nodes[node];
if (not node_obj) or (not node_obj.data[id]) then
return false, "item-not-found";
end
node_obj.data[id] = nil;
if retract then
self.cb.broadcaster(node, node_obj.subscribers, retract);
end
return true
end
function service:get(node, actor, id)
local node_obj = self.nodes[node];
if node_obj then
if id then
return { node_obj.data[id] };
else
return node_obj.data;
end
end
end
return _M;
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