[PATCH 08/10] lib: add _notmuch_message_remove_indexed_terms

[David Bremner]

Testing will be provided via use in notmuch_message_reindex
---
 lib/message.cc        | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/notmuch-private.h |  2 ++
 2 files changed, 56 insertions(+)

diff --git a/lib/message.cc b/lib/message.cc
index 5291e846..313660da 100644
--- a/lib/message.cc
+++ b/lib/message.cc
@@ -599,6 +599,59 @@ _notmuch_message_remove_terms (notmuch_message_t *message, const char *prefix)
     }
 }
 
+
+/* Remove all terms generated by indexing, i.e. not tags or
+ * properties, along with any automatic tags*/
+notmuch_private_status_t
+_notmuch_message_remove_indexed_terms (notmuch_message_t *message)
+{
+    Xapian::TermIterator i;
+
+    const std::string
+	id_prefix = _find_prefix ("id"),
+	property_prefix = _find_prefix ("property"),
+	tag_prefix = _find_prefix ("tag"),
+	type_prefix = _find_prefix ("type");
+
+    for (i = message->doc.termlist_begin ();
+	 i != message->doc.termlist_end (); i++) {
+
+	const std::string term = *i;
+
+	if (term.compare (0, type_prefix.size (), type_prefix) == 0)
+	    continue;
+
+	if (term.compare (0, id_prefix.size (), id_prefix) == 0)
+	    continue;
+
+	if (term.compare (0, property_prefix.size (), property_prefix) == 0)
+	    continue;
+
+	if (term.compare (0, tag_prefix.size (), tag_prefix) == 0 &&
+	    term.compare (1, strlen("encrypted"), "encrypted") != 0 &&
+	    term.compare (1, strlen("signed"), "signed") != 0 &&
+	    term.compare (1, strlen("attachment"), "attachment") != 0)
+	    continue;
+
+	try {
+	    message->doc.remove_term ((*i));
+	    message->modified = TRUE;
+	} catch (const Xapian::InvalidArgumentError) {
+	    /* Ignore failure to remove non-existent term. */
+	} catch (const Xapian::Error &error) {
+	    notmuch_database_t *notmuch = message->notmuch;
+
+	    if (!notmuch->exception_reported) {
+		_notmuch_database_log(_notmuch_message_database (message), "A Xapian exception occurred creating message: %s\n",
+				      error.get_msg().c_str());
+		notmuch->exception_reported = TRUE;
+	    }
+	    return NOTMUCH_PRIVATE_STATUS_XAPIAN_EXCEPTION;
+	}
+    }
+    return NOTMUCH_PRIVATE_STATUS_SUCCESS;
+}
+
 /* Return true if p points at "new" or "cur". */
 static bool is_maildir (const char *p)
 {
@@ -646,6 +699,7 @@ _notmuch_message_add_folder_terms (notmuch_message_t *message,
 
     talloc_free (folder);
 
+    message->modified = TRUE;
     return NOTMUCH_STATUS_SUCCESS;
 }
 
diff --git a/lib/notmuch-private.h b/lib/notmuch-private.h
index 69179177..ebfba35d 100644
--- a/lib/notmuch-private.h
+++ b/lib/notmuch-private.h
@@ -534,6 +534,8 @@ _notmuch_message_add_reply (notmuch_message_t *message,
 notmuch_database_t *
 _notmuch_message_database (notmuch_message_t *message);
 
+void
+_notmuch_message_remove_unprefixed_terms (notmuch_message_t *message);
 /* sha1.c */
 
 char *
-- 
2.11.0