Method prepareBroadcastableMessage

server/topic.go:253–282

prepareBroadcastableMessage sets the topic field in `msg` depending on the uid and subscription type.

(msg *ServerComMessage, uid types.Uid, isChanSub bool)

// prepareBroadcastableMessage sets the topic field in `msg` depending on the uid and subscription type.
func (t *Topic) prepareBroadcastableMessage(msg *ServerComMessage, uid types.Uid, isChanSub bool) {
	// We are only interested in broadcastable messages.
	if msg.Data == nil && msg.Pres == nil && msg.Info == nil {
		return
	}

	if (t.cat == types.TopicCatP2P && !uid.IsZero()) || (t.cat == types.TopicCatGrp && t.isChan) {
		// For p2p topics topic name is dependent on receiver.
		// Channel topics may be presented as grpXXX or chnXXX.
		var topicName string
		if isChanSub {
			topicName = types.GrpToChn(t.xoriginal)
		} else {
			topicName = t.original(uid)
		}
		switch {
		case msg.Data != nil:
			msg.Data.Topic = topicName
		case msg.Pres != nil:
			msg.Pres.Topic = topicName
		case msg.Info != nil:
			msg.Info.Topic = topicName
		}
	}

	// Send channel messages anonymously.
	if isChanSub && msg.Data != nil {
		msg.Data.From = ""
	}
}

// computePerUserAcsUnion computes want and given permissions unions over all topic's subscribers.
func (t *Topic) computePerUserAcsUnion() {