Add ModMetadata API (#5131)

* mod can create a ModMetadata object where store its values and retrieve it.
* Modmetadata object can only be fetched at mod loading
* Save when modified using same time as map interval or at server stop
* add helper function to get mod storage path
* ModMetadata has exactly same calls than all every other Metadata

1 files changed, 8 insertions, 1 deletions

diff --git a/src/server.h b/src/server.h
index 8f553ce38..3eee67b78 100644
--- a/src/server.h
+++ b/src/server.h
@@ -299,7 +299,8 @@ public:
 	const ModSpec* getModSpec(const std::string &modname) const;
 	void getModNames(std::vector<std::string> &modlist);
 	std::string getBuiltinLuaPath();
-	inline std::string getWorldPath() const { return m_path_world; }
+	inline const std::string &getWorldPath() const { return m_path_world; }
+	std::string getModStoragePath() const;
 
 	inline bool isSingleplayer()
 			{ return m_simple_singleplayer_mode; }
@@ -360,6 +361,9 @@ public:
 	void SendInventory(PlayerSAO* playerSAO);
 	void SendMovePlayer(u16 peer_id);
 
+	bool registerModStorage(ModMetadata *storage);
+	void unregisterModStorage(const std::string &name);
+
 	// Bind address
 	Address m_bind_addr;
 
@@ -650,6 +654,9 @@ private:
 	// value = "" (visible to all players) or player name
 	std::map<std::string, std::string> m_detached_inventories_player;
 
+	UNORDERED_MAP<std::string, ModMetadata *> m_mod_storages;
+	float m_mod_storage_save_timer;
+
 	DISABLE_CLASS_COPY(Server);
 };