Definitively block placing shelves/totes inside shelves.

docs/longterm.txt

@@ -56,6 +56,14 @@ NEW CONTENT
 ------------------------------------------------------------------------
 USABILITY
 
+- Update README.
+	- Add "gameplay basics"
+		- Crafting in-world
+		- Pummeling
+		- Sensitivity to which node face
+		- Check inventory screen for hints
+	- Installation guide?
+
 - Hint system updates.
 	- Need a "witness" system for spontaneous in-world processes,
 	  such as tree growth or lode cooling.  Credit players within
@@ -66,7 +74,6 @@ USABILITY
 
 - Social features
 	- Randomize player appearance/colors.
-	- Players show damage on texture?
 	- Players show wielditem on texture or floating ent?
 
 ------------------------------------------------------------------------

docs/roadmap.txt

@@ -3,16 +3,9 @@ ROADMAP (SHORT-TERM)
 ------------------------------------------------------------------------
 
 - Fix bug allowing totes to be placed into shelves.
-- Update README.
-	- Add "gameplay basics"
-		- Crafting in-world
-		- Pummeling
-		- Sensitivity to which node face
-		- Check inventory screen for hints
-	- Installation guide?
 - Digital logic + lighting via optics.
-	- Mirrors
-		- Change light angle
+	- Mirrors or Lenses
+		- Change light angle?
 		- Focus sunlight?
 	- Prism Node
 		- 1 face (back) is VCC face, must be fed light to do anything.

mods/nc_api/util_stack.lua

@@ -16,6 +16,13 @@ function nodecore.stack_set(pos, stack)
 end
 
 function nodecore.stack_add(pos, stack)
+	local node = minetest.get_node(pos)
+	local def = minetest.registered_items[node.name]
+	if def and def.stack_allow then
+		local ret = def.stack_allow(pos, node, stack, def)
+		if ret == false then return stack end
+		if ret and ret ~= true then return ret end
+	end
 	return nodecore.node_inv(pos):add_item("solo", ItemStack(stack))
 end
 

mods/nc_tote/init.lua

@@ -111,6 +111,7 @@ minetest.register_node(modname .. ":handle", {
 		},
 		groups = {
 			snappy = 1,
+			container = 1,
 			fire_fuel = 5
 		},
 		after_dig_node = totedug,

mods/nc_woodwork/shelf.lua

@@ -30,6 +30,7 @@ minetest.register_node(modname .. ":shelf", {
 			flammable = 2,
 			fire_fuel = 3,
 			eject_inv_on_burn = 1,
+			container = 1,
 			totable = 1
 		},
 		paramtype = "light",
@@ -57,6 +58,9 @@ minetest.register_node(modname .. ":shelf", {
 			if nodecore.stack_giveto(pos, digger) then
 				return minetest.node_dig(pos, node, digger, ...)
 			end
+		end,
+		stack_allow = function(pos, node, stack, def)
+			if def and def.groups and def.groups.container then return false end
 		end
 	})