lib: add notmuch_thread_get_total_files

This is relatively inexpensive in terms of run time and implementation
cost as we are already traversing the list of messages in a thread.

2 files changed, 21 insertions, 0 deletions

diff --git a/lib/notmuch.h b/lib/notmuch.h
index f5018497..4c03a893 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -1097,6 +1097,18 @@ int
 notmuch_thread_get_total_messages (notmuch_thread_t *thread);
 
 /**
+ * Get the total number of files in 'thread'.
+ *
+ * This sums notmuch_message_count_files over all messages in the
+ * thread
+ * @returns Non-negative integer
+ * @since libnotmuch 5.0 (notmuch 0.25)
+ */
+
+int
+notmuch_thread_get_total_files (notmuch_thread_t *thread);
+
+/**
  * Get a notmuch_messages_t iterator for the top-level messages in
  * 'thread' in oldest-first order.
  *
diff --git a/lib/thread.cc b/lib/thread.cc
index 1a1ecfa5..e17ef63e 100644
--- a/lib/thread.cc
+++ b/lib/thread.cc
@@ -44,6 +44,7 @@ struct _notmuch_thread {
 
     GHashTable *message_hash;
     int total_messages;
+    int total_files;
     int matched_messages;
     time_t oldest;
     time_t newest;
@@ -266,6 +267,7 @@ _thread_add_message (notmuch_thread_t *thread,
     _notmuch_message_list_add_message (thread->message_list,
 				       talloc_steal (thread, message));
     thread->total_messages++;
+    thread->total_files += notmuch_message_count_files (message);
 
     g_hash_table_insert (thread->message_hash,
 			 xstrdup (notmuch_message_get_message_id (message)),
@@ -495,6 +497,7 @@ _notmuch_thread_create (void *ctx,
 						  free, NULL);
 
     thread->total_messages = 0;
+    thread->total_files = 0;
     thread->matched_messages = 0;
     thread->oldest = 0;
     thread->newest = 0;
@@ -567,6 +570,12 @@ notmuch_thread_get_total_messages (notmuch_thread_t *thread)
 }
 
 int
+notmuch_thread_get_total_files (notmuch_thread_t *thread)
+{
+    return thread->total_files;
+}
+
+int
 notmuch_thread_get_matched_messages (notmuch_thread_t *thread)
 {
     return thread->matched_messages;