Clean and improve sponge

- Solves #268

mods/sponge/init.lua

@@ -9,13 +9,13 @@ minetest.register_node("sponge:sponge", {
 	buildable_to = false,
 	stack_max = 99,
 	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=3,flammable=3},
-	   	on_place = function(itemstack, placer, pointed_thing)
+	after_place_node = function(pos, placer, itemstack, pointed_thing)
 		local pn = placer:get_player_name()
 		if pointed_thing.type ~= "node" then
-			return itemstack
+			return
 		end
 		if minetest.is_protected(pointed_thing.above, pn) then
-			return itemstack
+			return
 		end
 		local change = false
 		local on_water = false
@@ -65,16 +65,11 @@ minetest.register_node("sponge:sponge", {
 				end
 			end
 		end
+		if change then
+			minetest.add_node(pointed_thing.above, {name = "sponge:sponge_wet"})
+		end
 		p = {x=pos.x, y=pos.y, z=pos.z}
 		n = minetest.get_node(p)
-			if change == true then
-				minetest.add_node(pointed_thing.above, {name = "sponge:sponge_wet"})
-			else
-				minetest.add_node(pointed_thing.above, {name = "sponge:sponge"})
-			end
-		itemstack:take_item()
-		return itemstack
-
 	end
 })
 
@@ -97,10 +92,10 @@ minetest.register_craft({
 })
 
 minetest.register_craft({
-output = "sponge:sponge",
-recipe = {
-{"", "dye:black", ""},
-{"dye:yellow", "wool:white", "dye:yellow"},
-{"", "farming:wheat", ""},
-},
+	output = "sponge:sponge",
+	recipe = {
+		{"", "dye:black", ""},
+		{"dye:yellow", "wool:white", "dye:yellow"},
+		{"", "farming:wheat", ""},
+	},
 })