Make metadata cache versioned

resources/metadb/001.sql

@@ -21,7 +21,8 @@ CREATE TABLE item (
  mtime INTEGER,
  playcount INTEGER DEFAULT 0,
  lastplay INTEGER,
- parent INTEGER
+ parent INTEGER,
+ metadataversion INTEGER
  );
 
 CREATE INDEX item_url_idx ON item(url);

src/metadata.c

@@ -1,3 +1,21 @@
+/*
+ * Showtime mediacenter
+ * Copyright (C) 2007-2011 Andreas Öman
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http:https://www.gnu.org/licenses/>.
+ */
+
 #include <stdio.h>
 
 #include "prop/prop.h"
@@ -11,6 +29,8 @@
 #include "metadata.h"
 #include "fileaccess/fileaccess.h"
 
+#define METADATA_VERSION_STR "1"
+
 // If not set to true by metadb_init() no metadb actions will occur
 static int metadb_valid;
 static char *meta_db_path;
@@ -496,9 +516,9 @@ db_item_create(sqlite3 *db, const char *url, int contenttype, time_t mtime,
 
  rc = sqlite3_prepare_v2(db, 
  "INSERT INTO item "
- "(url, contenttype, mtime, parent) "
+ "(url, contenttype, mtime, parent, metadataversion) "
  "VALUES "
- "(?1, ?2, ?3, ?4)",
+ "(?1, ?2, ?3, ?4, " METADATA_VERSION_STR ")",
  -1, &stmt, NULL);
 
  if(rc != SQLITE_OK)
@@ -848,7 +868,9 @@ metadb_metadata_write(void *db, const char *url, time_t mtime,
 
  rc = sqlite3_prepare_v2(db, 
  "UPDATE item "
- "SET contenttype=?1, mtime=?2 "
+ "SET contenttype=?1, "
+ "mtime=?2, "
+ "metadataversion=" METADATA_VERSION_STR " "
  "WHERE id=?3",
  -1, &stmt, NULL);
 
@@ -1032,7 +1054,9 @@ metadb_metadata_get(void *db, const char *url, time_t mtime)
 
  rc = sqlite3_prepare_v2(db, 
  "SELECT id,contenttype from item "
- "where url=?1 and mtime=?2",
+ "where url=?1 AND "
+ "mtime=?2 AND "
+ "metadataversion=" METADATA_VERSION_STR,
  -1, &sel, NULL);
  if(rc != SQLITE_OK) {
  rollback(db);