From cfe63bf7cbc2ff90faf95a8edbaa09c608dcf6dd Mon Sep 17 00:00:00 2001
From: Elias Fleckenstein <eliasfleckenstein@web.de>
Date: Fri, 19 Feb 2021 10:46:56 +0100
Subject: [PATCH] Add grouplist API

---
 mods/elidragon_grouplist/init.lua | 28 ++++++++++++++++++++++++++++
 mods/elidragon_grouplist/mod.conf |  4 ++++
 2 files changed, 32 insertions(+)
 create mode 100644 mods/elidragon_grouplist/init.lua
 create mode 100644 mods/elidragon_grouplist/mod.conf

diff --git a/mods/elidragon_grouplist/init.lua b/mods/elidragon_grouplist/init.lua
new file mode 100644
index 0000000..26d9dd3
--- /dev/null
+++ b/mods/elidragon_grouplist/init.lua
@@ -0,0 +1,28 @@
+local grouplist = {}
+grouplist.lists = {}
+
+function grouplist.register(group)
+	local list = {}
+	grouplists.lists[group] = list
+	return list
+end
+
+function grouplist.get(group)
+	return grouplist.lists[group] or {}
+end
+
+function grouplist.insert(item, group)
+	table.insert(grouplist.get(group), item)
+end
+
+minetest.register_on_mods_loaded(function()
+	for nodename, nodedef in pairs(minetest.registered_items) do
+		for group, list in pairs(grouplist.lists) do
+			if nodedef.groups[group] and nodedef.groups[group] > 0 then
+				table.insert(list, nodename)
+			end
+		end
+	end
+end)
+
+elidragon.grouplist = grouplist
diff --git a/mods/elidragon_grouplist/mod.conf b/mods/elidragon_grouplist/mod.conf
new file mode 100644
index 0000000..cba148c
--- /dev/null
+++ b/mods/elidragon_grouplist/mod.conf
@@ -0,0 +1,4 @@
+name = elidragon_grouplist
+author = Fleckenstein
+description = An API to easily store all items belonging to an itemgroup in a list
+depends = elidragon
-- 
2.44.0