Add 'notmuch count' command to show the count of matching messages
[notmuch] / lib / query.cc
index 86167352381e5ed22dd3177e1ce32d98c2b2559d..686d75f9657cf4e142a1983c41e0ab29ee3ff960 100644 (file)
@@ -279,3 +279,55 @@ notmuch_threads_destroy (notmuch_threads_t *threads)
 {
     talloc_free (threads);
 }
+
+unsigned
+notmuch_query_count_messages (notmuch_query_t *query)
+{
+    notmuch_database_t *notmuch = query->notmuch;
+    const char *query_string = query->query_string;
+    Xapian::doccount count;
+
+    try {
+       Xapian::Enquire enquire (*notmuch->xapian_db);
+       Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
+                                                  _find_prefix ("type"),
+                                                  "mail"));
+       Xapian::Query string_query, final_query;
+       Xapian::MSet mset;
+       unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
+                             Xapian::QueryParser::FLAG_PHRASE |
+                             Xapian::QueryParser::FLAG_LOVEHATE |
+                             Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE |
+                             Xapian::QueryParser::FLAG_WILDCARD |
+                             Xapian::QueryParser::FLAG_PURE_NOT);
+
+       if (strcmp (query_string, "") == 0) {
+           final_query = mail_query;
+       } else {
+           string_query = notmuch->query_parser->
+               parse_query (query_string, flags);
+           final_query = Xapian::Query (Xapian::Query::OP_AND,
+                                        mail_query, string_query);
+       }
+
+       enquire.set_weighting_scheme(Xapian::BoolWeight());
+       enquire.set_docid_order(Xapian::Enquire::ASCENDING);
+
+#if DEBUG_QUERY
+       fprintf (stderr, "Final query is:\n%s\n", final_query.get_description().c_str());
+#endif
+
+       enquire.set_query (final_query);
+
+       mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount ());
+
+       count = mset.get_matches_estimated();
+
+    } catch (const Xapian::Error &error) {
+       fprintf (stderr, "A Xapian exception occurred: %s\n",
+                error.get_msg().c_str());
+       fprintf (stderr, "Query string was: %s\n", query->query_string);
+    }
+
+    return count;
+}