From 20cde75edbf1bd48369e8404eabce33aa65d76dc Mon Sep 17 00:00:00 2001
From: Samuel Sieb <samuel@sieb.net>
Date: Fri, 18 Mar 2016 15:10:52 -0700
Subject: [PATCH] Paint cans now have a limited number of uses

---
 paint.lua | 87 +++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 72 insertions(+), 15 deletions(-)

diff --git a/paint.lua b/paint.lua
index e941ba1..6baaeba 100644
--- a/paint.lua
+++ b/paint.lua
@@ -1,10 +1,21 @@
-local USES = 3
+local BRUSH_USES = 3
+local CAN_USES = 100
 
-function check_paint(name)
+function check_paintcan(pos, node)
+	local name = string.sub(node.name, 10)
 	if string.sub(name, 1, 6) ~= "paint_" then
 		return
 	end
 	local color = string.sub(name, 7)
+	local meta = minetest.get_meta(pos)
+	local uses = meta:get_int("myfences:uses") - 1
+	meta:set_int("myfences:uses", uses)
+	local info = meta:get_string("infotext")
+	info = string.gsub(info, "%(.*%)", "("..uses.." uses)")
+	meta:set_string("infotext", info)
+	if uses <= 0 then
+		minetest.dig_node(pos)
+	end
 	return ItemStack("myfences:brush_"..color)
 end
 
@@ -35,7 +46,7 @@ function paint_node(pos, node, col, itemstack)
 		if nname == name then
 			minetest.set_node(pos,{name = "myfences:"..name.."_"..col, param2 = node.param2})
 			if not minetest.setting_getbool("creative_mode") then
-				local wear = itemstack:get_wear() + 65535 / USES
+				local wear = itemstack:get_wear() + 65535 / BRUSH_USES
 				if wear < 65535 then
 					itemstack:set_wear(wear)
 				else
@@ -56,12 +67,10 @@ minetest.register_tool("myfences:brush", {
 		end
 		local pos = pointed_thing.under
 		local node = minetest.get_node(pos)
-		local name = node.name
-		if string.sub(name, 1, 9) ~= "myfences:" then
+		if string.sub(node.name, 1, 9) ~= "myfences:" then
 			return
 		end
-		name = string.sub(name, 10)
-		return check_paint(name)
+		return check_paintcan(pos, node)
 	end
 })
 
@@ -78,12 +87,10 @@ for _, entry in ipairs(myfences.colors) do
 			end
 			local pos = pointed_thing.under
 			local node = minetest.get_node(pos)
-			local name = node.name
-			if string.sub(name, 1, 9) ~= "myfences:" then
+			if string.sub(node.name, 1, 9) ~= "myfences:" then
 				return
 			end
-			name = string.sub(name, 10)
-			local ret = check_paint(name)
+			local ret = check_paintcan(pos, node)
 			if ret then
 				return ret
 			end
@@ -99,22 +106,72 @@ minetest.register_node("myfences:paint_"..col, {
 	mesh = "myfences_can.obj",
 	tiles = {"myfences_paint_"..col..".png"},
 	stack_max = 1,
-	groups = {oddly_breakable_by_hand = 3,dig_immediate = 3},
+	drop = "",
+	groups = {oddly_breakable_by_hand = 3, dig_immediate = 3, not_in_creative_inventory = 1},
 	selection_box = {
 		type = "fixed",
 		fixed = {
 			{-0.25, -0.5, -0.25, 0.25, 0., 0.25}, 
 		}
 	},
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		if not digger then
+			return
+		end
+		local inv = digger:get_inventory()
+		if not inv then
+			return
+		end
+		local itemstack = ItemStack("myfences:paintcan_"..col)
+		local uses = tonumber(oldmetadata.fields["myfences:uses"])
+		if uses <= 0 then
+			return
+		end
+		itemstack:set_wear((CAN_USES - uses) * (65535 / CAN_USES))
+		if inv:room_for_item("main", itemstack) then
+			inv:add_item("main", itemstack)
+		else
+			minetest.add_item(pos, itemstack)
+		end
+	end
 })
 
-minetest.register_craft({
-		output = "myfences:paint_"..col,
+	minetest.register_tool("myfences:paintcan_"..col, {
+		description = desc.." Paint",
+		inventory_image = "myfences_paint_can_"..col..".png",
+		on_place = function(itemstack, user, pointed_thing)
+			local pname = "myfences:paint_"..col
+			local paint = ItemStack(pname)
+			paint = minetest.item_place_node(paint, user, pointed_thing)
+			if not paint or (paint:get_count() > 0) then
+				return
+			end
+			local pos = pointed_thing.under
+			local node = minetest.get_node(pos)
+			local meta = minetest.get_meta(pos)
+			if node.name ~= pname or (meta:get_int("myfences:uses") > 0) then
+				pos = pointed_thing.above
+				node = minetest.get_node(pos)
+				meta = minetest.get_meta(pos)
+				if node.name ~= pname or (meta:get_int("myfences:uses") > 0) then
+					return
+				end
+			end
+			local uses = math.floor(CAN_USES - itemstack:get_wear() / (65535 / CAN_USES))
+			meta:set_int("myfences:uses", uses)
+			meta:set_string("infotext", desc.." Paint ("..uses.." uses)")
+			itemstack:take_item()
+			return itemstack
+		end
+	})
+
+	minetest.register_craft({
+		output = "myfences:paintcan_"..col,
 		recipe = {
 			{"bucket:bucket_water","dye:"..col}
 		},
 		replacements = {{"bucket:bucket_water","bucket:bucket_empty"}},
-})
+	})
 end
 
 minetest.register_craftitem("myfences:paint_brush_bristles",{