+ node_obj.affiliations[jid] = affiliation;
+ local _, jid_sub = self:get_subscription(node, nil, jid);
+ if not jid_sub and not self:may(node, jid, "be_unsubscribed") then
+ local ok, err = self:add_subscription(node, nil, jid);
+ if not ok then
+ return ok, err;
+ end
+ elseif jid_sub and not self:may(node, jid, "be_subscribed") then
+ local ok, err = self:add_subscription(node, nil, jid);
+ if not ok then
+ return ok, err;
+ end
+ end
+ return true;
+end
+
+function service:add_subscription(node, actor, jid, options)
+ -- Access checking
+ local cap;
+ if jid == actor or self.config.jids_equal(actor, jid) then
+ cap = "subscribe";
+ else
+ cap = "subscribe_other";
+ end
+ if not self:may(node, actor, cap) then
+ return false, "forbidden";
+ end
+ if not self:may(node, jid, "be_subscribed") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if not node_obj then
+ if not self.config.autocreate_on_subscribe then
+ return false, "item-not-found";
+ else
+ local ok, err = self:create(node, actor);
+ if not ok then
+ return ok, err;
+ end
+ end
+ end
+ node_obj.subscribers[jid] = options or true;