added pump and finished pipe

mods/pipe/init.lua

@@ -1,8 +1,8 @@
 local pipe_form = "size[8,6]"
 local pipe_form = pipe_form..default.gui_colors
 local pipe_form = pipe_form..default.gui_bg
-local pipe_form = pipe_form.."list[current_name;main;2,0.3;4,1;]" 
-local pipe_form = pipe_form..default.itemslot_bg(2,0.3,4,1)
+local pipe_form = pipe_form.."list[current_name;main;3,0.3;2,1;]" 
+local pipe_form = pipe_form..default.itemslot_bg(3,0.3,2,1)
 local pipe_form = pipe_form.."list[current_player;main;0,1.85;8,1;]" 
 local pipe_form = pipe_form..default.itemslot_bg(0,1.85,8,1)
 local pipe_form = pipe_form.."list[current_player;main;0,3.08;8,3;8]" 
@@ -26,13 +26,12 @@ minetest.register_node("pipe:pipe", {
 		meta:set_string("formspec", pipe_form)
 		meta:set_string("infotext", "Pipe")
 		local inv = meta:get_inventory()
-		inv:set_size("main", 4)
+		inv:set_size("main", 2)
 	end,
 })
 
 minetest.register_abm({
 	nodenames = {"pipe:pipe"},
-	neighbors = {"pipe:pipe"},
 	interval = 1.0,
 	chance = 1,
 	action = function(pos, node, active_object_count, active_object_count_wider)
@@ -44,8 +43,66 @@ minetest.register_abm({
 		local next_inv = next_meta:get_inventory()
 		
 		if next_inv:room_for_item("main", inv:get_list("main")[1]) and not inv:get_list("main")[1]:is_empty() then
-			next_inv:add_item(inv:get_list("main")[1])
-			inv:remove_item("main", 1)
+			next_inv:add_item("main", inv:get_list("main")[1])
+			inv:remove_item("main", inv:get_list("main")[1])
+		end
+		if next_inv:room_for_item("main", inv:get_list("main")[2]) and not inv:get_list("main")[2]:is_empty() then
+			next_inv:add_item("main", inv:get_list("main")[2])
+			inv:remove_item("main", inv:get_list("main")[2])
+		end	
+	end,
+})
+
+minetest.register_node("pipe:pump", {
+	description = "Pump",
+	tiles = {"pipe_pump_top.png", "pipe_pump_top.png", "pipe_pump_side_alt.png", "pipe_pump_side.png", "pipe_pump_front.png", "pipe_pump_front.png"},
+	groups = {choppy = 3},
+	paramtype = "light",
+	paramtype2 = "facedir",
+	drawtype = "nodebox",
+	node_box = {
+		type = "fixed",
+		fixed = {
+				{-0.5, -0.5, -0.5, 0.5, 0, 0.5},
+			},
+	},
+})
+
+minetest.register_abm({
+	nodenames = {"pipe:pump"},
+	interval = 1.0,
+	chance = 1,
+	action = function(pos, node, active_object_count, active_object_count_wider)
+		local meta = minetest.get_meta(pos)
+	
+		local next_dir = vector.multiply(minetest.facedir_to_dir(minetest.get_node({x = pos.x, y= pos.y, z=pos.z}).param2), -1)
+		local dir = minetest.facedir_to_dir(minetest.get_node({x = pos.x, y= pos.y, z=pos.z}).param2)
+
+		local last_pos = vector.add(pos, dir)
+		local next_pos = vector.add(pos, next_dir)
+
+		local next_meta = minetest.get_meta(next_pos)
+		local last_meta = minetest.get_meta(last_pos)
+
+		local last_inv = last_meta:get_inventory()
+		local next_inv = next_meta:get_inventory()
+	
+		local item_pos = 1
+
+		if not last_inv:get_list("main") then
+			return 
+		end
+		
+		for k,v in pairs(last_inv:get_list("main")) do
+			if not v:is_empty() then
+				item_pos = k
+			end
+		end
+
+		
+		if next_inv:room_for_item("main", last_inv:get_list("main")[item_pos]) and not last_inv:get_list("main")[item_pos]:is_empty() then
+			next_inv:add_item("main", last_inv:get_list("main")[item_pos])
+			last_inv:remove_item("main", last_inv:get_list("main")[item_pos])
 		end	
 	end,
 })