+ function readableBy(Profile $other=null)
+ {
+ // If it's not a private stream, it's readable by anyone
+ if (!$this->isPrivateStream()) {
+ return true;
+ }
+
+ // If it's a private stream, $other must be a subscriber to $this
+ return is_null($other) ? false : $other->isSubscribed($this);
+ }
+
+ function requiresSubscriptionApproval(Profile $other=null)
+ {
+ if (!$this->isLocal()) {
+ // We don't know for remote users, and we'll always be able to send
+ // the request. Whether it'll work immediately or require moderation
+ // can be determined in another function.
+ return false;
+ }
+
+ // Assume that profiles _we_ subscribe to are permitted. Could be made configurable.
+ if (!is_null($other) && $this->isSubscribed($other)) {
+ return false;
+ }
+
+ // If the local user either has a private stream (implies the following)
+ // or user has a moderation policy for new subscriptions, return true.
+ return $this->getUser()->private_stream || $this->getUser()->subscribe_policy === User::SUBSCRIBE_POLICY_MODERATE;
+ }
+