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lib: Refactor _notmuch_database_link_message

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This moves the code to retrieve and clear the metadata thread ID out
of _notmuch_database_link_message into its own function.  This will
simplify future changes.
This commit is contained in:
Austin Clements 2014-10-06 17:17:08 -06:00 committed by David Bremner
parent 54ec8a0fd8
commit 46b1b035a5
1 changed files with 43 additions and 26 deletions
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69
lib/database.cc
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@ -1958,6 +1958,37 @@ _notmuch_database_link_message_to_children (notmuch_database_t *notmuch,
return ret;
}
/* Fetch and clear the stored thread_id for message, or NULL if none. */
static char *
_consume_metadata_thread_id (void *ctx, notmuch_database_t *notmuch,
notmuch_message_t *message)
{
const char *message_id;
string stored_id;
char *metadata_key;
message_id = notmuch_message_get_message_id (message);
metadata_key = _get_metadata_thread_id_key (ctx, message_id);
/* Check if we have already seen related messages to this one.
* If we have then use the thread_id that we stored at that time.
*/
stored_id = notmuch->xapian_db->get_metadata (metadata_key);
if (stored_id.empty ()) {
return NULL;
} else {
Xapian::WritableDatabase *db;
db = static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db);
/* Clear the metadata for this message ID. We don't need it
* anymore. */
db->set_metadata (metadata_key, "");
return talloc_strdup (ctx, stored_id.c_str ());
}
}
/* Given a (mostly empty) 'message' and its corresponding
* 'message_file' link it to existing threads in the database.
*
@ -1988,42 +2019,25 @@ _notmuch_database_link_message (notmuch_database_t *notmuch,
notmuch_message_t *message,
notmuch_message_file_t *message_file)
{
void *local = talloc_new (NULL);
notmuch_status_t status;
const char *message_id, *thread_id = NULL;
char *metadata_key;
string stored_id;
const char *thread_id;
message_id = notmuch_message_get_message_id (message);
metadata_key = _get_metadata_thread_id_key (message, message_id);
/* Check if we have already seen related messages to this one.
* If we have then use the thread_id that we stored at that time.
*/
stored_id = notmuch->xapian_db->get_metadata (metadata_key);
if (! stored_id.empty()) {
Xapian::WritableDatabase *db;
db = static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db);
/* Clear the metadata for this message ID. We don't need it
* anymore. */
db->set_metadata (metadata_key, "");
thread_id = stored_id.c_str();
_notmuch_message_add_term (message, "thread", thread_id);
}
talloc_free (metadata_key);
/* Check if the message already had a thread ID */
thread_id = _consume_metadata_thread_id (local, notmuch, message);
if (thread_id)
_notmuch_message_add_term (message, "thread", thread_id);
status = _notmuch_database_link_message_to_parents (notmuch, message,
message_file,
&thread_id);
if (status)
return status;
goto DONE;
status = _notmuch_database_link_message_to_children (notmuch, message,
&thread_id);
if (status)
return status;
goto DONE;
/* If not part of any existing thread, generate a new thread ID. */
if (thread_id == NULL) {
@ -2032,7 +2046,10 @@ _notmuch_database_link_message (notmuch_database_t *notmuch,
_notmuch_message_add_term (message, "thread", thread_id);
}
return NOTMUCH_STATUS_SUCCESS;
DONE:
talloc_free (local);
return status;
}
notmuch_status_t