Method presSubsOffline

server/pres.go:432–475

Publish to topic subscribers's sessions currently offline in the topic, on their 'me' Group and P2P. Case E: topic came online, "on" Case F: topic went offline, "off" Case G: topic updated 'public', "upd", who Case H: topic deleted, "gone" Case K.3: user altered WANT, "acs" to admins Case L.4: Admin

(what string, params *presParams,
	filterSource *presFilters, filterTarget *presFilters, skipSid string, offlineOnly bool)

// Case T: message sent, "msg" to all with 'R'
// Case W.1: messages hard-deleted, "del" to all with 'R'
func (t *Topic) presSubsOffline(what string, params *presParams,
	filterSource *presFilters, filterTarget *presFilters, skipSid string, offlineOnly bool) {
	var skipTopic string
	if offlineOnly {
		skipTopic = t.name
	}

	for uid, pud := range t.perUser {
		if pud.deleted || !presOfflineFilter(pud.modeGiven&pud.modeWant, what, filterSource) {
			continue
		}

		user := uid.UserId()
		actor := params.actor
		target := params.target
		if actor == user {
			actor = ""
		}

		if target == user {
			target = ""
		}

		globals.hub.routeSrv <- &ServerComMessage{
			Pres: &MsgServerPres{
				Topic:       "me",
				What:        what,
				Src:         t.original(uid),
				Acs:         params.packAcs(),
				AcsActor:    actor,
				AcsTarget:   target,
				SeqId:       params.seqID,
				DelId:       params.delID,
				FilterIn:    int(filterTarget.filterIn),
				FilterOut:   int(filterTarget.filterOut),
				SingleUser:  filterTarget.singleUser,
				ExcludeUser: filterTarget.excludeUser,
				SkipTopic:   skipTopic,
			},
			RcptTo:  user,
			SkipSid: skipSid,
		}
	}
}

// Publish {info what=read|recv|kp} to topic subscribers's sessions currently offline in the topic,
// on subscriber's 'me'. Group and P2P.