+void
+_notmuch_thread_add_tag (notmuch_thread_t *thread, const char *tag)
+{
+ g_hash_table_insert (thread->tags, xstrdup (tag), NULL);
+}
+
+void
+_notmuch_thread_set_subject (notmuch_thread_t *thread, const char *subject)
+{
+ thread->subject = talloc_strdup (thread, subject);
+}
+
+const char *
+notmuch_thread_get_subject (notmuch_thread_t *thread)
+{
+ return thread->subject;
+}
+
+notmuch_tags_t *
+notmuch_thread_get_tags (notmuch_thread_t *thread)
+{
+ notmuch_tags_t *tags;
+ GList *keys, *l;
+
+ tags = _notmuch_tags_create (thread);
+ if (unlikely (tags == NULL))
+ return NULL;
+
+ keys = g_hash_table_get_keys (thread->tags);
+
+ for (l = keys; l; l = l->next)
+ _notmuch_tags_add_tag (tags, (char *) l->data);
+
+ g_list_free (keys);
+
+ _notmuch_tags_prepare_iterator (tags);
+
+ return tags;
+}
+