Add tubelib compatibility

depends.txt

@@ -1,4 +1,6 @@
 default
 currency?
 bitchange?
-wrench?
+wrench?
+pipeworks?
+tubelib?

init.lua

@@ -23,6 +23,7 @@ else
 	dofile(modpath .. "/shop_functions.lua")
 	dofile(modpath .. "/shop.lua")
 end
+dofile(modpath .. "/pipes.lua")
 
 if has_currency then
 	local new_groups = table.copy(minetest.registered_nodes["currency:shop"].groups)

mod.conf

@@ -1,3 +1,4 @@
 name = exchange_shop
+description = An improved currency-compatible exchange shop
 depends = default
-optional_depends = currency, bitchange, wrench
+optional_depends = currency, bitchange, wrench, pipeworks, tubelib

pipes.lua

@@ -0,0 +1,38 @@
+if minetest.get_modpath("pipeworks") then
+	minetest.override_item(exchange_shop.shopname, {
+		groups = {choppy=2, oddly_breakable_by_hand=2,
+			tubedevice=1, tubedevice_receiver=1},
+		tube = {
+			insert_object = function(pos, node, stack, direction)
+				local meta = minetest.get_meta(pos)
+				local inv = meta:get_inventory()
+				return inv:add_item("stock", stack)
+			end,
+			can_insert = function(pos, node, stack, direction)
+				local meta = minetest.get_meta(pos)
+				local inv = meta:get_inventory()
+				return inv:room_for_item("stock", stack)
+			end,
+			input_inventory = "custm",
+			connect_sides = {left=1, right=1, back=1, top=1, bottom=1}
+		}
+	})
+end
+
+if minetest.get_modpath("tubelib") then
+	tubelib.register_node(exchange_shop.shopname, {}, {
+		on_pull_item = function(pos, side)
+			local meta = minetest.get_meta(pos)
+			return tubelib.get_item(meta, "custm")
+		end,
+		on_push_item = function(pos, side, item)
+			local meta = minetest.get_meta(pos)
+			return tubelib.put_item(meta, "stock", item)
+		end,
+		on_unpull_item = function(pos, side, item)
+			local meta = minetest.get_meta(pos)
+			return tubelib.put_item(meta, "stock", item)
+		end,
+	})
+
+end

shop.lua

@@ -165,22 +165,7 @@ minetest.register_node(exchange_shop.shopname, {
 		"shop_side.png", "shop_front.png"
 	},
 	paramtype2 = "facedir",
-	groups = {choppy=2, oddly_breakable_by_hand=2, 
+	groups = {choppy=2, oddly_breakable_by_hand=2},
-		tubedevice=1, tubedevice_receiver=1},
-	tube = {
-		insert_object = function(pos, node, stack, direction)
-			local meta = minetest.get_meta(pos)
-			local inv = meta:get_inventory()
-			return inv:add_item("stock", stack)
-		end,
-		can_insert = function(pos, node, stack, direction)
-			local meta = minetest.get_meta(pos)
-			local inv = meta:get_inventory()
-			return inv:room_for_item("stock", stack)
-		end,
-		input_inventory = "custm",
-		connect_sides = {left=1, right=1, back=1, top=1, bottom=1}
-	},
 	sounds = default.node_sound_wood_defaults(),
 	after_place_node = function(pos, placer)
 		local meta = minetest.get_meta(pos)