Upgrade database for new Vienna Developer URL

Closes ViennaRSS#1251.
After moving to GitHub pages our RSS feed URL changed.
The only way to really redirect is through changing the URL in the DB.

Vienna/Sources/Database/Database.m

@@ -62,7 +62,7 @@ + (NSString *)databasePath;
 
 // The current database version number
 const NSInteger MA_Min_Supported_DB_Version = 12;
-const NSInteger MA_Current_DB_Version = 19;
+const NSInteger MA_Current_DB_Version = 20;
 
 @implementation Database
 

Vienna/Sources/Database/VNADatabaseMigration.m

@@ -127,6 +127,22 @@ + (void)migrateDatabase:(FMDatabase *)db fromVersion:(NSInteger)fromVersion {
  db.userVersion = (uint32_t)19;
  NSLog(@"Updated database schema to version 19.");
  }
+ case 20: {
+ // Upgrade to rev 20.
+ // Update the Vienna Developer's blog RSS URL after moved to github pages
+
+ FMResultSet *results = [db executeQuery:@"SELECT folder_id FROM rss_folders WHERE feed_url LIKE ?", @"%%www.vienna-rss.com/?feed=rss2%%"];
+
+ if([results next]) {
+ int viennaFolderId = [results intForColumn:@"folder_id"];
+ [db executeUpdate:@"UPDATE rss_folders SET feed_url=? WHERE folder_id=?",
+ @"https://www.vienna-rss.com/feed.xml",
+ @(viennaFolderId)];
+ }
+ [results close];
+ db.userVersion = (uint32_t)20;
+ NSLog(@"Updated database schema to version 20.");
+ }
  }
 
 }