From cf717ce73f37415fd975844efd15a46da339e3f8 Mon Sep 17 00:00:00 2001
From: Vanessa Ezekowitz <vanessaezekowitz@gmail.com>
Date: Fri, 7 Jun 2013 14:11:42 -0400
Subject: [PATCH] Fixed missing check for ownership/node protection in lights
 made lights check for buildable_to instead of just air

---
 lighting.lua | 59 ++++++++++++++++++++++++++++++++--------------------
 1 file changed, 36 insertions(+), 23 deletions(-)

diff --git a/lighting.lua b/lighting.lua
index cb833476..9a090699 100644
--- a/lighting.lua
+++ b/lighting.lua
@@ -14,36 +14,49 @@ local dirs1 = { 20, 23, 22, 21 }
 local dirs2 = { 9, 18, 7, 12 }
 
 function homedecor_rotate_and_place(itemstack, placer, pointed_thing)
+	if not homedecor_node_is_owned(pointed_thing.under, placer) 
+	   and not homedecor_node_is_owned(pointed_thing.above, placer) then
+		local node = minetest.env:get_node(pointed_thing.under)
+		if not minetest.registered_nodes[node.name] or not minetest.registered_nodes[node.name].on_rightclick then
 
-	local node = minetest.env:get_node(pointed_thing.under)
-	if not minetest.registered_nodes[node.name] or not minetest.registered_nodes[node.name].on_rightclick then
+			local above = pointed_thing.above
+			local under = pointed_thing.under
+			local pitch = placer:get_look_pitch()
+			local pname = minetest.env:get_node(under).name
+			local node = minetest.env:get_node(above)
+			local fdir = minetest.dir_to_facedir(placer:get_look_dir())
+			local wield_name = itemstack:get_name()
 
-		local above = pointed_thing.above
-		local under = pointed_thing.under
-		local pitch = placer:get_look_pitch()
-		local node = minetest.env:get_node(above)
-		local fdir = minetest.dir_to_facedir(placer:get_look_dir())
-		local wield_name = itemstack:get_name()
+			if not minetest.registered_nodes[pname]
+			    or not minetest.registered_nodes[pname].on_rightclick then
 
-		if node.name ~= "air" then return end
+				local iswall = (above.x ~= under.x) or (above.z ~= under.z)
+				local isceiling = (above.x == under.x) and (above.z == under.z) and (pitch > 0)
+				local pos1 = above
 
-		local iswall = (above.x ~= under.x) or (above.z ~= under.z)
-		local isceiling = (above.x == under.x) and (above.z == under.z) and (pitch > 0)
+				if minetest.registered_nodes[pname]["buildable_to"] then
+					pos1 = under
+					iswall = false
+				end
 
-		if iswall then 
-			minetest.env:add_node(above, {name = wield_name, param2 = dirs2[fdir+1] }) -- place wall variant
-		elseif isceiling then
-			minetest.env:add_node(above, {name = wield_name, param2 = 20 }) -- place upside down variant
+				if not minetest.registered_nodes[minetest.env:get_node(pos1).name]["buildable_to"] then return end
+
+				if iswall then 
+					minetest.env:add_node(pos1, {name = wield_name, param2 = dirs2[fdir+1] }) -- place wall variant
+				elseif isceiling then
+					minetest.env:add_node(pos1, {name = wield_name, param2 = 20 }) -- place upside down variant
+				else
+					minetest.env:add_node(pos1, {name = wield_name, param2 = 0 }) -- place right side up
+				end
+
+				if not homedecor_expect_infinite_stacks then
+					itemstack:take_item()
+					return itemstack
+				end
+			end
 		else
-			minetest.env:add_node(above, {name = wield_name, param2 = 0 }) -- place right side up
+			minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack)
 		end
-
-		if not homedecor_expect_infinite_stacks then
-			itemstack:take_item()
-			return itemstack
-		end
-	else
-		minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack)
 	end
 end