Player data to Database (#5475)

* Player data to Database

Add player data into databases (SQLite3 & PG only)

PostgreSQL & SQLite: better POO Design for databases

Add --migrate-players argument to server + deprecation warning

* Remove players directory if empty

1 files changed, 46 insertions, 0 deletions

diff --git a/src/database-files.h b/src/database-files.h
new file mode 100644
index 000000000..d23069c2a
--- /dev/null
+++ b/src/database-files.h
@@ -0,0 +1,46 @@
+/*
+Minetest
+Copyright (C) 2017 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef DATABASE_FILES_HEADER
+#define DATABASE_FILES_HEADER
+
+// !!! WARNING !!!
+// This backend is intended to be used on Minetest 0.4.16 only for the transition backend for
+// player files
+
+#include "database.h"
+
+class PlayerDatabaseFiles : public PlayerDatabase
+{
+public:
+	PlayerDatabaseFiles(const std::string &savedir) : m_savedir(savedir) {}
+	virtual ~PlayerDatabaseFiles() {}
+
+	void savePlayer(RemotePlayer *player);
+	bool loadPlayer(RemotePlayer *player, PlayerSAO *sao);
+	bool removePlayer(const std::string &name);
+	void listPlayers(std::vector<std::string> &res);
+
+private:
+	void serialize(std::ostringstream &os, RemotePlayer *player);
+
+	std::string m_savedir;
+};
+
+#endif