From cb155021b1c6160906a8ea32ab1c1419ca2aaa0b Mon Sep 17 00:00:00 2001
From: Lars Mueller <appgurulars@gmx.de>
Date: Mon, 16 Aug 2021 18:21:49 +0200
Subject: [PATCH] Add modlib.minetest.playerdata

---
 minetest.lua      |  3 ++-
 minetest/misc.lua | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/minetest.lua b/minetest.lua
index d388697..3837afd 100644
--- a/minetest.lua
+++ b/minetest.lua
@@ -23,7 +23,8 @@ for filename, comps in pairs{
 		"decode_base64",
 		"objects_inside_radius",
 		"objects_inside_area",
-		"nodename_matcher"
+		"nodename_matcher",
+		"playerdata",
 	},
 	liquid = {
 		"liquid_level_max",
diff --git a/minetest/misc.lua b/minetest/misc.lua
index f752da2..1cc0ec7 100644
--- a/minetest/misc.lua
+++ b/minetest/misc.lua
@@ -215,3 +215,25 @@ function nodename_matcher(node_or_groupname)
 		end
 	end
 end
+
+do
+	local default_create, default_free = function() return {} end, modlib.func.no_op
+	local metatable = {__index = function(self, player)
+		if type(player) == "userdata" then
+			return self[player:get_player_name()]
+		end
+	end}
+	function playerdata(create, free)
+		create = create or default_create
+		free = free or default_free
+		local data = {}
+		minetest.register_on_joinplayer(function(player)
+			data[player:get_player_name()] = create(player)
+		end)
+		minetest.register_on_leaveplayer(function(player)
+			data[player:get_player_name()] = free(player)
+		end)
+		setmetatable(data, metatable)
+		return data
+	end
+end