local events = require "util.events";
+local t_remove = table.remove;
module("pubsub", package.seeall);
affiliations = {};
subscriptions = {};
nodes = {};
+ data = {};
events = events.new();
}, service_mt);
end
function service:may(node, actor, action)
if actor == true then return true; end
-
+
local node_obj = self.nodes[node];
local node_aff = node_obj and node_obj.affiliations[actor];
local service_aff = self.affiliations[actor]
or self.config.get_affiliation(actor, node, action)
or "none";
-
+
-- Check if node allows/forbids it
local node_capabilities = node_obj and node_obj.capabilities;
if node_capabilities then
end
end
end
-
+
-- Check service-wide capabilities instead
local service_capabilities = self.config.capabilities;
local caps = service_capabilities[node_aff or service_aff];
return can;
end
end
-
+
return false;
end
if self.nodes[node] then
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
+function service:delete(node, actor)
+ -- Access checking
+ if not self:may(node, actor, "delete") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if not node_obj then
+ 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
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(node, node_obj.subscribers, item);
+ self.config.broadcaster("items", node, node_obj.subscribers, item);
return true;
end
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
- node_obj.data[id] = nil;
+ self.events.fire_event("item-retracted", { node = node, actor = actor, id = id });
+ remove_item_by_id(self.data[node], id);
if retract then
- self.config.broadcaster(node, node_obj.subscribers, retract);
+ self.config.broadcaster("items", node, node_obj.subscribers, retract);
+ end
+ return true
+end
+
+function service:purge(node, actor, notify)
+ -- Access checking
+ if not self:may(node, actor, "retract") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if not node_obj then
+ return false, "item-not-found";
+ end
+ 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);
end
return true
end
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
if node then -- Return only subscriptions to this node
if subscribed_nodes[node] then
ret[#ret+1] = {
- node = subscribed_node;
+ node = node;
jid = jid;
subscription = node_obj.subscribers[jid];
};