Move duplicate recipe from books to default.register_craft_metadata_copy()

This allows mods to easily implement the same behaviour, e.g. for letters.

diff --git a/game_api.txt b/game_api.txt
index c6d07908f42774c175657d8679e985692f80dea1..52c64f4c1b8762a0b7e12f04d5d9218feba9f3b4 100644 (file)
--- a/game_api.txt
+++ b/game_api.txt
@@ -1055,3 +1055,11 @@ for the wielded skeleton key.
 
 if `nil` is returned, it is assumed that the wielder did not have
 permissions to create a key for this node, and no key is created.
+
+`default.register_craft_metadata_copy(ingredient, result)`
+----------------------------------------------------------
+
+This function registers a shapeless recipe that takes `ingredient`
+and `result` as input and outputs `result`.
+
+The metadata of the input `result` is copied to the output `result`.

diff --git a/mods/default/craftitems.lua b/mods/default/craftitems.lua
index 1c93eb23335f67c097d2ab4c5f5c854dee109613..045f745aacb2e9158eed3aa925547997c725997e 100644 (file)
--- a/mods/default/craftitems.lua
+++ b/mods/default/craftitems.lua
@@ -145,29 +145,6 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
        player:set_wielded_item(stack)
 end)
 
-minetest.register_on_craft(function(itemstack, player, old_craft_grid, craft_inv)
-       if itemstack:get_name() ~= "default:book_written" then
-               return
-       end
-
-       local original
-       local index
-       for i = 1, player:get_inventory():get_size("craft") do
-               if old_craft_grid[i]:get_name() == "default:book_written" then
-                       original = old_craft_grid[i]
-                       index = i
-               end
-       end
-       if not original then
-               return
-       end
-       local copymeta = original:get_meta():to_table()
-       -- copy of the book held by player's mouse cursor
-       itemstack:get_meta():from_table(copymeta)
-       -- put the book with metadata back in the craft grid
-       craft_inv:set_stack("craft", index, original)
-end)
-
 minetest.register_craftitem("default:skeleton_key", {
        description = S("Skeleton Key"),
        inventory_image = "default_key_skeleton.png",
@@ -361,11 +338,7 @@ minetest.register_craft({
        }
 })
 
-minetest.register_craft({
-       type = "shapeless",
-       output = "default:book_written",
-       recipe = {"default:book", "default:book_written"}
-})
+default.register_craft_metadata_copy("default:book", "default:book_written")
 
 minetest.register_craft({
        output = "default:bronze_ingot 9",

diff --git a/mods/default/functions.lua b/mods/default/functions.lua
index 91f8bb3912b6693ba52b9148cf5b2a6327aaaef1..450984d0d81e21a32556afb1e8372ae3efaeaf15 100644 (file)
--- a/mods/default/functions.lua
+++ b/mods/default/functions.lua
@@ -581,6 +581,40 @@ minetest.register_abm({
        end
 })
 
+--
+-- Register a craft to copy the metadata of items
+--
+
+function default.register_craft_metadata_copy(ingredient, result)
+       minetest.register_craft({
+               type = "shapeless",
+               output = result,
+               recipe = {ingredient, result}
+       })
+
+       minetest.register_on_craft(function(itemstack, player, old_craft_grid, craft_inv)
+               if itemstack:get_name() ~= result then
+                       return
+               end
+
+               local original
+               local index
+               for i = 1, #old_craft_grid do
+                       if old_craft_grid[i]:get_name() == result then
+                               original = old_craft_grid[i]
+                               index = i
+                       end
+               end
+               if not original then
+                       return
+               end
+               local copymeta = original:get_meta():to_table()
+               itemstack:get_meta():from_table(copymeta)
+               -- put the book with metadata back in the craft grid
+               craft_inv:set_stack("craft", index, original)
+       end)
+end
+
 
 --
 -- NOTICE: This method is not an official part of the API yet.