X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=database.cc;h=415040bc7000c4f9cb195e25cb9119d72c15a29d;hp=15d159ffd13494d6f672491a04b3e3868630238c;hb=edd37e68a96ada9187976dd0421b3f545fffbf78;hpb=9fc4a365d6cf478563caa012862c58a9b3945f76

diff --git a/database.cc b/database.cc
index 15d159ff..415040bc 100644
--- a/database.cc
+++ b/database.cc
@@ -43,7 +43,7 @@ notmuch_status_to_string (notmuch_status_t status)
     case NOTMUCH_STATUS_NULL_POINTER:
 	return "Erroneous NULL pointer";
     case NOTMUCH_STATUS_TAG_TOO_LONG:
-	return "Tag value is too long";
+	return "Tag value is too long (exceeds NOTMUCH_TAG_MAX)";
     default:
     case NOTMUCH_STATUS_LAST_STATUS:
 	return "Unknown error status value";
@@ -92,10 +92,49 @@ find_doc_ids (notmuch_database_t *notmuch,
     free (term);
 }
 
-Xapian::Document
-find_message_by_docid (Xapian::Database *db, Xapian::docid docid)
+static notmuch_private_status_t
+find_unique_doc_id (notmuch_database_t *notmuch,
+		    const char *prefix_name,
+		    const char *value,
+		    unsigned int *doc_id)
 {
-    return db->get_document (docid);
+    Xapian::PostingIterator i, end;
+
+    find_doc_ids (notmuch, prefix_name, value, &i, &end);
+
+    if (i == end) {
+	*doc_id = 0;
+	return NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND;
+    } else {
+	*doc_id = *i;
+	return NOTMUCH_PRIVATE_STATUS_SUCCESS;
+    }
+}
+
+static Xapian::Document
+find_document_for_doc_id (notmuch_database_t *notmuch, unsigned doc_id)
+{
+    return notmuch->xapian_db->get_document (doc_id);
+}
+
+static notmuch_private_status_t
+find_unique_document (notmuch_database_t *notmuch,
+		      const char *prefix_name,
+		      const char *value,
+		      Xapian::Document *document,
+		      unsigned int *doc_id)
+{
+    notmuch_private_status_t status;
+
+    status = find_unique_doc_id (notmuch, prefix_name, value, doc_id);
+
+    if (status) {
+	*document = Xapian::Document ();
+	return status;
+    }
+
+    *document = find_document_for_doc_id (notmuch, *doc_id);
+    return NOTMUCH_PRIVATE_STATUS_SUCCESS;
 }
 
 static void
@@ -125,14 +164,15 @@ notmuch_message_t *
 notmuch_database_find_message (notmuch_database_t *notmuch,
 			       const char *message_id)
 {
-    Xapian::PostingIterator i, end;
+    notmuch_private_status_t status;
+    unsigned int doc_id;
 
-    find_doc_ids (notmuch, "msgid", message_id, &i, &end);
+    status = find_unique_doc_id (notmuch, "msgid", message_id, &doc_id);
 
-    if (i == end)
+    if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND)
 	return NULL;
 
-    return _notmuch_message_create (notmuch, notmuch, *i);
+    return _notmuch_message_create (notmuch, notmuch, doc_id);
 }
 
 /* Return one or more thread_ids, (as a GPtrArray of strings), for the
@@ -147,7 +187,6 @@ find_thread_ids (notmuch_database_t *notmuch,
 		 GPtrArray *parents,
 		 const char *message_id)
 {
-    Xapian::WritableDatabase *db = notmuch->xapian_db;
     Xapian::PostingIterator child, children_end;
     Xapian::Document doc;
     GHashTable *thread_ids;
@@ -161,7 +200,7 @@ find_thread_ids (notmuch_database_t *notmuch,
 
     find_doc_ids (notmuch, "ref", message_id, &child, &children_end);
     for ( ; child != children_end; child++) {
-	doc = find_message_by_docid (db, *child);
+	doc = find_document_for_doc_id (notmuch, *child);
 	insert_thread_id (thread_ids, doc);
     }
 
@@ -445,6 +484,101 @@ notmuch_database_get_path (notmuch_database_t *notmuch)
     return notmuch->path;
 }
 
+notmuch_private_status_t
+find_timestamp_document (notmuch_database_t *notmuch, const char *db_key,
+			 Xapian::Document *doc, unsigned int *doc_id)
+{
+    return find_unique_document (notmuch, "timestamp", db_key, doc, doc_id);
+}
+
+/* We allow the user to use arbitrarily long keys for timestamps,
+ * (they're for filesystem paths after all, which have no limit we
+ * know about). But we have a term-length limit. So if we exceed that,
+ * we'll use the SHA-1 of the user's key as the actual key for
+ * constructing a database term.
+ *
+ * Caution: This function returns a newly allocated string which the
+ * caller should free() when finished.
+ */
+static char *
+timestamp_db_key (const char *key)
+{
+    if (strlen (key) + 1 > NOTMUCH_TERM_MAX) {
+	return notmuch_sha1_of_string (key);
+    } else {
+	return strdup (key);
+    }
+}
+
+notmuch_status_t
+notmuch_database_set_timestamp (notmuch_database_t *notmuch,
+				const char *key, time_t timestamp)
+{
+    Xapian::Document doc;
+    unsigned int doc_id;
+    notmuch_private_status_t status;
+    notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
+    char *db_key = NULL;
+
+    db_key = timestamp_db_key (key);
+
+    try {
+	status = find_timestamp_document (notmuch, db_key, &doc, &doc_id);
+
+	doc.add_value (0, Xapian::sortable_serialise (timestamp));
+
+	if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
+	    char *term = talloc_asprintf (NULL, "%s%s",
+					  _find_prefix ("timestamp"), db_key);
+	    doc.add_term (term);
+	    talloc_free (term);
+
+	    notmuch->xapian_db->add_document (doc);
+	} else {
+	    notmuch->xapian_db->replace_document (doc_id, doc);
+	}
+
+    } catch (Xapian::Error &error) {
+	fprintf (stderr, "A Xapian exception occurred: %s.\n",
+		 error.get_msg().c_str());
+	ret = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+    }
+
+    if (db_key)
+	free (db_key);
+
+    return ret;
+}
+
+time_t
+notmuch_database_get_timestamp (notmuch_database_t *notmuch, const char *key)
+{
+    Xapian::Document doc;
+    unsigned int doc_id;
+    notmuch_private_status_t status;
+    char *db_key = NULL;
+    time_t ret = 0;
+
+    db_key = timestamp_db_key (key);
+
+    try {
+	status = find_timestamp_document (notmuch, db_key, &doc, &doc_id);
+
+	if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND)
+	    goto DONE;
+
+	ret =  Xapian::sortable_unserialise (doc.get_value (0));
+    } catch (Xapian::Error &error) {
+	goto DONE;
+    }
+
+  DONE:
+    if (db_key)
+	free (db_key);
+
+    return ret;
+}
+
 notmuch_status_t
 notmuch_database_add_message (notmuch_database_t *notmuch,
 			      const char *filename)