Function extractTopics

reader.go:1585–1603

extractTopics returns the unique list of topics represented by the set of provided members.

(members []GroupMember)

// extractTopics returns the unique list of topics represented by the set of
// provided members.
func extractTopics(members []GroupMember) []string {
	visited := map[string]struct{}{}
	var topics []string

	for _, member := range members {
		for _, topic := range member.Topics {
			if _, seen := visited[topic]; seen {
				continue
			}

			topics = append(topics, topic)
			visited[topic] = struct{}{}
		}
	}

	sort.Strings(topics)

	return topics
}

type humanOffset int64