From d3850ca205b24a501203c20f4a6a5f2a25abed32 Mon Sep 17 00:00:00 2001
From: Buckaroo Banzai <39065740+BuckarooBanzay@users.noreply.github.com>
Date: Sun, 28 Jun 2020 20:57:34 +0200
Subject: [PATCH] Register drawers with mvps_stopper when available (#50)

Co-authored-by: BuckarooBanzay <BuckarooBanzay@users.noreply.github.com>
---
 .luacheckrc |  3 ++-
 lua/api.lua | 13 +++++++++++++
 mod.conf    |  2 +-
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/.luacheckrc b/.luacheckrc
index 31175a1..a89bc33 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -24,5 +24,6 @@ read_globals = {
 	"pipeworks",
 	"screwdriver",
 	"intllib",
-	"digilines"
+	"digilines",
+	"mesecon"
 }
diff --git a/lua/api.lua b/lua/api.lua
index ea1e150..c93f7ca 100755
--- a/lua/api.lua
+++ b/lua/api.lua
@@ -318,6 +318,8 @@ function drawers.register_drawer(name, def)
 		def.after_dig_node = pipeworks.after_dig
 	end
 
+	local has_mesecons_mvps = minetest.get_modpath("mesecons_mvps")
+
 	if drawers.enable_1x1 then
 		-- normal drawer 1x1 = 1
 		local def1 = table.copy(def)
@@ -329,6 +331,11 @@ function drawers.register_drawer(name, def)
 		def1.groups.drawer = 1
 		core.register_node(name .. "1", def1)
 		core.register_alias(name, name .. "1") -- 1x1 drawer is the default one
+		if has_mesecons_mvps then
+			-- don't let drawers be moved by pistons, visual glitches and
+			-- possible duplication bugs occur otherwise
+			mesecon.register_mvps_stopper(name .. "1")
+		end
 	end
 
 	if drawers.enable_1x2 then
@@ -341,6 +348,9 @@ function drawers.register_drawer(name, def)
 		def2.tiles4 = nil
 		def2.groups.drawer = 2
 		core.register_node(name .. "2", def2)
+		if has_mesecons_mvps then
+			mesecon.register_mvps_stopper(name .. "2")
+		end
 	end
 
 	if drawers.enable_2x2 then
@@ -353,6 +363,9 @@ function drawers.register_drawer(name, def)
 		def4.tiles4 = nil
 		def4.groups.drawer = 4
 		core.register_node(name .. "4", def4)
+		if has_mesecons_mvps then
+			mesecon.register_mvps_stopper(name .. "4")
+		end
 	end
 
 	if (not def.no_craft) and def.material then
diff --git a/mod.conf b/mod.conf
index fd27d74..ca346f9 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,2 +1,2 @@
 name = drawers
-optional_depends = default, mcl_core, screwdriver, pipeworks, intllib, moreores, digilines
+optional_depends = default, mcl_core, screwdriver, pipeworks, intllib, moreores, digilines, mesecons_mvps