+static void
+_thread_add_author (notmuch_thread_t *thread,
+ const char *author)
+{
+ if (author == NULL)
+ return;
+
+ if (g_hash_table_lookup_extended (thread->authors_hash,
+ author, NULL, NULL))
+ return;
+
+ g_hash_table_insert (thread->authors_hash, xstrdup (author), NULL);
+
+ if (thread->authors)
+ thread->authors = talloc_asprintf (thread, "%s, %s",
+ thread->authors,
+ author);
+ else
+ thread->authors = talloc_strdup (thread, author);
+}
+
+/*
+ * move authors of matched messages in the thread to
+ * the front of the authors list, but keep them in
+ * existing order within their group
+ */
+static void
+_thread_move_matched_author (notmuch_thread_t *thread,
+ const char *author)
+{
+ char *authors_copy;
+ char *current_author;
+ char *last_pipe,*next_pipe;
+ int idx,nm_start,author_len,authors_len;
+
+ if (thread->authors == NULL || author == NULL)
+ return;
+ if (thread->nonmatched_authors == NULL)
+ thread->nonmatched_authors = thread->authors;
+ author_len = strlen(author);
+ authors_len = strlen(thread->authors);
+ if (author_len == authors_len) {
+ /* just one author */
+ thread->nonmatched_authors += author_len;
+ return;
+ }
+ current_author = strcasestr(thread->authors, author);
+ if (current_author == NULL)
+ return;
+ /* how far inside the nonmatched authors is our author? */
+ idx = current_author - thread->nonmatched_authors;
+ if (idx < 0) {
+ /* already among matched authors */
+ return;
+ }
+ /* are there any authors in the list after our author? */
+ if (thread->nonmatched_authors + author_len < thread->authors + authors_len) {
+ /* we have to make changes, so let's get a temp copy */
+ authors_copy = talloc_strdup(thread,thread->authors);
+ /* nm_start is the offset into where the non-matched authors start */
+ nm_start = thread->nonmatched_authors - thread->authors;
+ /* copy this author and add the "| " - the if clause above tells us there's more */
+ strncpy(thread->nonmatched_authors,author,author_len);
+ strncpy(thread->nonmatched_authors+author_len,"| ",2);
+ thread->nonmatched_authors += author_len+2;
+ if (idx > 0) {
+ /* we are actually moving authors around, not just changing the separator
+ * first copy the authors that came BEFORE our author */
+ strncpy(thread->nonmatched_authors, authors_copy+nm_start, idx-2);
+ /* finally, if there are authors AFTER our author, copy those */
+ if(author_len+nm_start+idx < authors_len) {
+ strncpy(thread->nonmatched_authors + idx - 2,", ",2);
+ strncpy(thread->nonmatched_authors + idx, authors_copy+nm_start + idx + author_len + 2,
+ authors_len - (nm_start + idx + author_len + 2));
+ }
+ }
+ /* finally let's make sure there's just one '|' in the authors string */
+ last_pipe = strchr(thread->authors,'|');
+ while (last_pipe) {
+ next_pipe = strchr(last_pipe+1,'|');
+ if (next_pipe)
+ *last_pipe = ',';
+ last_pipe = next_pipe;
+ }
+ } else {
+ thread->nonmatched_authors += author_len;
+ /* so now all authors are matched - let's remove the '|' */
+ last_pipe = strchr(thread->authors,'|');
+ if (last_pipe)
+ *last_pipe = ',';
+ }
+ return;
+}
+
+/* Add 'message' as a message that belongs to 'thread'.
+ *
+ * The 'thread' will talloc_steal the 'message' and hold onto a
+ * reference to it.
+ */
+static void
+_thread_add_message (notmuch_thread_t *thread,
+ notmuch_message_t *message)
+{
+ notmuch_tags_t *tags;
+ const char *tag;
+ InternetAddressList *list = NULL;
+ InternetAddress *address;
+ const char *from, *author;
+
+ _notmuch_message_list_add_message (thread->message_list,
+ talloc_steal (thread, message));
+ thread->total_messages++;
+
+ g_hash_table_insert (thread->message_hash,
+ xstrdup (notmuch_message_get_message_id (message)),
+ message);
+
+ from = notmuch_message_get_header (message, "from");
+ if (from)
+ list = internet_address_list_parse_string (from);
+
+ if (list) {
+ address = internet_address_list_get_address (list, 0);
+ if (address) {
+ author = internet_address_get_name (address);
+ if (author == NULL) {
+ InternetAddressMailbox *mailbox;
+ mailbox = INTERNET_ADDRESS_MAILBOX (address);
+ author = internet_address_mailbox_get_addr (mailbox);
+ }
+ _thread_add_author (thread, author);
+ notmuch_message_set_author (message, author);
+ }
+ g_object_unref (G_OBJECT (list));
+ }
+
+ if (! thread->subject) {
+ const char *subject;
+ subject = notmuch_message_get_header (message, "subject");
+ thread->subject = talloc_strdup (thread, subject ? subject : "");
+ }
+
+ for (tags = notmuch_message_get_tags (message);
+ notmuch_tags_valid (tags);
+ notmuch_tags_move_to_next (tags))
+ {
+ tag = notmuch_tags_get (tags);
+ g_hash_table_insert (thread->tags, xstrdup (tag), NULL);
+ }
+}
+
+static void
+_thread_set_subject_from_message (notmuch_thread_t *thread,
+ notmuch_message_t *message)
+{
+ const char *subject;
+ const char *cleaned_subject;
+
+ subject = notmuch_message_get_header (message, "subject");
+ if (! subject)
+ return;
+
+ if ((strncasecmp (subject, "Re: ", 4) == 0) ||
+ (strncasecmp (subject, "Aw: ", 4) == 0) ||
+ (strncasecmp (subject, "Vs: ", 4) == 0) ||
+ (strncasecmp (subject, "Sv: ", 4) == 0)) {
+
+ cleaned_subject = talloc_strndup (thread,
+ subject + 4,
+ strlen(subject) - 4);
+ } else {
+ cleaned_subject = talloc_strdup (thread, subject);
+ }
+
+ if (thread->subject)
+ talloc_free (thread->subject);
+
+ thread->subject = talloc_strdup (thread, cleaned_subject);
+}
+
+static void
+_thread_add_matched_message (notmuch_thread_t *thread,
+ notmuch_message_t *message,
+ notmuch_sort_t sort)
+{
+ time_t date;
+ notmuch_message_t *hashed_message;
+
+ date = notmuch_message_get_date (message);
+
+ if (date < thread->oldest || ! thread->matched_messages)
+ thread->oldest = date;
+
+ if (date > thread->newest || ! thread->matched_messages)
+ thread->newest = date;
+
+ thread->matched_messages++;
+
+ if (g_hash_table_lookup_extended (thread->message_hash,
+ notmuch_message_get_message_id (message), NULL,
+ (void **) &hashed_message)) {
+ notmuch_message_set_flag (hashed_message,
+ NOTMUCH_MESSAGE_FLAG_MATCH, 1);
+ }
+ _thread_move_matched_author (thread,notmuch_message_get_author(hashed_message));
+
+ if ((sort == NOTMUCH_SORT_OLDEST_FIRST && date <= thread->newest) ||
+ (sort != NOTMUCH_SORT_OLDEST_FIRST && date == thread->newest))
+ {
+ _thread_set_subject_from_message (thread, message);
+ }
+}
+
+static void
+_resolve_thread_relationships (unused (notmuch_thread_t *thread))
+{
+ notmuch_message_node_t **prev, *node;
+ notmuch_message_t *message, *parent;
+ const char *in_reply_to;
+
+ prev = &thread->message_list->head;
+ while ((node = *prev)) {
+ message = node->message;
+ in_reply_to = _notmuch_message_get_in_reply_to (message);
+ if (in_reply_to && strlen (in_reply_to) &&
+ g_hash_table_lookup_extended (thread->message_hash,
+ in_reply_to, NULL,
+ (void **) &parent))
+ {
+ *prev = node->next;
+ if (thread->message_list->tail == &node->next)
+ thread->message_list->tail = prev;
+ node->next = NULL;
+ _notmuch_message_add_reply (parent, node);
+ } else {
+ prev = &((*prev)->next);
+ }
+ }
+
+ /* XXX: After scanning through the entire list looking for parents
+ * via "In-Reply-To", we should do a second pass that looks at the
+ * list of messages IDs in the "References" header instead. (And
+ * for this the parent would be the "deepest" message of all the
+ * messages found in the "References" list.)
+ *
+ * Doing this will allow messages and sub-threads to be positioned
+ * correctly in the thread even when an intermediate message is
+ * missing from the thread.
+ */
+}
+
+/* Create a new notmuch_thread_t object for the given thread ID,
+ * treating any messages matching 'query_string' as "matched".