added recipe_data() and crafting_remaining_item() - for convenient crafting scripts.

build.gradle

@@ -11,6 +11,7 @@ version = project.minecraft_version+'-'+project.mod_version
 group = project.maven_group
 
 minecraft {
+	accessWidener "src/main/resources/carpet.accesswidener"
 }
 
 dependencies {

docs/scarpet/Full.md

@@ -2940,6 +2940,50 @@ item_category('ender_pearl') => misc
 item_category('stone') => building_blocks
 </pre>
 
+### `recipe_data(item, type?)`, `recipe_data(recipe, type?)`
+
+returns all recipes matching either an `item`, or represent actual `recipe` name. In vanilla datapack, for all items
+that have one recipe available, the recipe name is the same as the item name but if an item has multiple recipes, its
+direct name can be different.
+
+Recipe type can take one of the following options:
+ * `'crafting'` - default, crafting table recipe
+ * `'smelting'` - furnace recipe
+ * `'blasting'` - blast furnace recipe
+ * `'smoking'` - smoker recipe
+ * `'campfire_cooking'` - campfire recipe
+ * `'stonecutting'` - stonecutter recipe
+ 
+ The return value is a list of available recipes (even if there is only one recipe available). Each recipe contains of
+ an item triple of the crafting result, list of ingredients, each containing a list of possible variants of the
+ ingredients in this slot, as item triples, or `null` if its a shaped recipe and a given slot in the patterns is left
+ empty, and recipe specification as another list. Possible recipe specs is:
+  * `['shaped', width, height]` - shaped crafting. `width` and `height` can be 1, 2 or 3.
+  * `['shapeless']` - shapeless crafting
+  * `['smelting', duration, xp]` - smelting/cooking recipes
+  * `['cutting']` - stonecutter recipe
+  * `['special']` - special crafting recipe, typically not present in the crafting menu
+  * `['custom']` - other recipe types
+  
+Note that ingredients are specified as tripes, with count and nbt information. Currently all recipes require always one
+of the ingredients, and for some recipes, even if the nbt data for the ingredient is specified (e.g. `dispenser`), it
+can accept items of any tags.
+
+Also note that some recipes leave some products in the crafting window, and these can be determined using
+ `crafting_remaining_item()` function 
+  
+ Examples:
+ <pre>
+ recipe_data('iron_ingot_from_nuggets')
+ recipe_data('iron_ingot')
+ recipe_data('glass', 'smelting')
+ </pre>
+
+### `crafting_remaining_item(item)`
+
+returns `null` if the item has no remaining item in the crafting window when used as a crafting ingredient, or an
+item name that serves as a replacement after crafting is done. Currently it can only be buckets and glass bottles.
+
 ### `inventory_size(inventory)`
 
 Returns the size of the inventory for the entity or block in question. Returns null if the block or entity don't 
@@ -3055,6 +3099,8 @@ __on_player_right_clicks_block(player, item_tuple, hand, block, face, hitvec)  /
 __on_player_interacts_with_block(player, hand, block, face, hitvec)  //right click on a block resulted in activation of said block
 __on_player_places_block(player, item_tuple, hand, block) // player have just placed the block.
 __on_player_interacts_with_entity(player, entity, hand)
+__on_player_chooses_recipe(player, recipe, full_stack)
+__on_player_switches_slot(player, from, to)
 __on_player_attacks_entity(player, entity)
 __on_player_takes_damage(player, amount, source, source_entity)
 __on_player_deals_damage(player, amount, entity)

docs/scarpet/api/Events.md

@@ -32,6 +32,8 @@ __on_player_right_clicks_block(player, item_tuple, hand, block, face, hitvec)  /
 __on_player_interacts_with_block(player, hand, block, face, hitvec)  //right click on a block resulted in activation of said block
 __on_player_places_block(player, item_tuple, hand, block) // player have just placed the block.
 __on_player_interacts_with_entity(player, entity, hand)
+__on_player_chooses_recipe(player, recipe, full_stack)
+__on_player_switches_slot(player, from, to)
 __on_player_attacks_entity(player, entity)
 __on_player_takes_damage(player, amount, source, source_entity)
 __on_player_deals_damage(player, amount, entity)

docs/scarpet/resources/editors/idea/2.txt

@@ -12,6 +12,7 @@ blocks_daylight
 blocks_movement
 brightness
 chunk_tickets
+crafting_remaining_item
 create_marker
 current_dimension
 day_time
@@ -67,6 +68,7 @@ power
 property
 query
 random_tick
+recipe_data
 rect
 reload_chunk
 remove_all_markers

docs/scarpet/resources/editors/idea/4.txt

@@ -6,6 +6,7 @@ __on_player_attacks_entity
 __on_player_breaks_block
 __on_player_clicks_block
 __on_player_changes_dimension
+__on_player_chooses_recipe
 __on_player_deploys_elytra
 __on_player_drops_item
 __on_player_drops_stack
@@ -21,6 +22,7 @@ __on_player_starts_sneaking
 __on_player_starts_sprinting
 __on_player_stops_sneaking
 __on_player_stops_sprinting
+__on_player_switches_slot
 __on_player_uses_item
 __on_player_wakes_up
 __on_statistic

docs/scarpet/resources/editors/npp/scarpet.xml

@@ -62,7 +62,9 @@
 
                 player spawn entity_id entity_list entity_area entity_selector query modify entity_event
 
-                stack_limit item_category inventory_size inventory_has_items inventory_get inventory_set inventory_find inventory_remove drop_item
+                stack_limit item_category recipe_data crafting_remaining_item
+
+                inventory_size inventory_has_items inventory_get inventory_set inventory_find inventory_remove drop_item
 
                 scan volume neighbours rect diamond
 
@@ -87,6 +89,7 @@
                 __on_player_breaks_block
                 __on_player_clicks_block
                 __on_player_changes_dimension
+                __on_player_chooses_recipe
                 __on_player_deploys_elytra
                 __on_player_drops_item
                 __on_player_drops_stack
@@ -102,6 +105,7 @@
                 __on_player_starts_sprinting
                 __on_player_stops_sneaking
                 __on_player_stops_sprinting
+                __on_player_switches_slot
                 __on_player_uses_item
                 __on_player_wakes_up
                 __on_statistic

src/main/java/carpet/fakes/IngredientInterface.java

@@ -0,0 +1,11 @@
+package carpet.fakes;
+
+import net.minecraft.item.ItemStack;
+
+import java.util.Collection;
+import java.util.List;
+
+public interface IngredientInterface
+{
+    List<Collection<ItemStack>> getRecipeStacks();
+}

src/main/java/carpet/fakes/RecipeManagerInterface.java

@@ -0,0 +1,12 @@
+package carpet.fakes;
+
+import net.minecraft.recipe.Recipe;
+import net.minecraft.recipe.RecipeType;
+import net.minecraft.util.Identifier;
+
+import java.util.List;
+
+public interface RecipeManagerInterface
+{
+    List<Recipe<?>> getAllMatching(RecipeType type, Identifier output);
+}

src/main/java/carpet/mixins/Ingredient_scarpetMixin.java

@@ -0,0 +1,26 @@
+package carpet.mixins;
+
+import carpet.fakes.IngredientInterface;
+import net.minecraft.item.ItemStack;
+import net.minecraft.recipe.Ingredient;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Mixin(Ingredient.class)
+public class Ingredient_scarpetMixin implements IngredientInterface
+{
+    @Shadow @Final private Ingredient.Entry[] entries;
+
+    @Override
+    public List<Collection<ItemStack>> getRecipeStacks()
+    {
+        List<Collection<ItemStack>> res = Arrays.stream(entries).map(Ingredient.Entry::getStacks).collect(Collectors.toList());
+        return res;
+    }
+}

src/main/java/carpet/mixins/RecipeManager_scarpetMixin.java

@@ -0,0 +1,32 @@
+package carpet.mixins;
+
+import carpet.fakes.RecipeManagerInterface;
+import com.google.common.collect.Lists;
+import net.minecraft.recipe.Recipe;
+import net.minecraft.recipe.RecipeManager;
+import net.minecraft.recipe.RecipeType;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.registry.Registry;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+@Mixin(RecipeManager.class)
+public class RecipeManager_scarpetMixin implements RecipeManagerInterface
+{
+
+    @Shadow private Map<RecipeType<?>, Map<Identifier, Recipe<?>>> recipes;
+
+    @Override
+    public List<Recipe<?>> getAllMatching(RecipeType type, Identifier output)
+    {
+        Map<Identifier, Recipe<?>> typeRecipes = recipes.get(type);
+        if (typeRecipes.containsKey(output)) return Collections.singletonList(typeRecipes.get(output));
+        return Lists.newArrayList(typeRecipes.values().stream().filter(
+                r -> Registry.ITEM.getId(r.getOutput().getItem()).equals(output)).collect(Collectors.toList()));
+    }
+}

src/main/java/carpet/script/CarpetExpression.java

@@ -2,8 +2,10 @@ package carpet.script;
 
 import carpet.CarpetServer;
 import carpet.fakes.ChunkTicketManagerInterface;
+import carpet.fakes.IngredientInterface;
 import carpet.fakes.MinecraftServerInterface;
 import carpet.fakes.BiomeArrayInterface;
+import carpet.fakes.RecipeManagerInterface;
 import carpet.fakes.ServerChunkManagerInterface;
 import carpet.fakes.StatTypeInterface;
 import carpet.fakes.ThreadedAnvilChunkStorageInterface;
@@ -80,6 +82,13 @@ import net.minecraft.nbt.StringTag;
 import net.minecraft.nbt.Tag;
 import net.minecraft.particle.ParticleEffect;
 import net.minecraft.predicate.entity.EntityPredicates;
+import net.minecraft.recipe.AbstractCookingRecipe;
+import net.minecraft.recipe.CuttingRecipe;
+import net.minecraft.recipe.Recipe;
+import net.minecraft.recipe.RecipeType;
+import net.minecraft.recipe.ShapedRecipe;
+import net.minecraft.recipe.ShapelessRecipe;
+import net.minecraft.recipe.SpecialCraftingRecipe;
 import net.minecraft.scoreboard.Scoreboard;
 import net.minecraft.scoreboard.ScoreboardCriterion;
 import net.minecraft.scoreboard.ScoreboardObjective;
@@ -131,6 +140,7 @@ import org.apache.commons.lang3.tuple.Pair;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashMap;
@@ -1471,6 +1481,121 @@ public class CarpetExpression
             return (_c, _t) -> res;
         });
 
+        this.expr.addLazyFunction("recipe_data", -1, (c, t, lv) ->
+        {
+            CarpetContext cc = (CarpetContext)c;
+            if (lv.size() < 1) throw new InternalExpressionException("'recipe_data' requires at least one argument");
+            String recipeName = lv.get(0).evalValue(c).getString();
+            RecipeType type = RecipeType.CRAFTING;
+            if (lv.size() > 1)
+            {
+                String recipeType = lv.get(1).evalValue(c).getString();
+                try
+                {
+                    type = Registry.RECIPE_TYPE.get(new Identifier(recipeType));
+                }
+                catch (InvalidIdentifierException ignored)
+                {
+                    throw new InternalExpressionException("Unknown crafting category: " + recipeType);
+                }
+            }
+            List<Recipe<?>> recipes;
+            try
+            {
+                recipes = ((RecipeManagerInterface) cc.s.getMinecraftServer().getRecipeManager()).getAllMatching(type, new Identifier(recipeName));
+            }
+            catch (InvalidIdentifierException ignored)
+            {
+                return LazyValue.NULL;
+            }
+            if (recipes.isEmpty())
+                return LazyValue.NULL;
+            List<Value> recipesOutput = new ArrayList<>();
+            for (Recipe<?> recipe: recipes)
+            {
+                ItemStack result = recipe.getOutput();
+                List<Value> ingredientValue = new ArrayList<>();
+                CarpetSettings.LOG.error("input size: "+recipe.getPreviewInputs().size());
+                recipe.getPreviewInputs().forEach(
+                        ingredient ->
+                        {
+                            // I am flattening ingredient lists per slot.
+                            // consider recipe_data('wooden_sword','crafting') and ('iron_nugget', 'blasting') and notice difference
+                            // in depths of lists.
+                            List<Collection<ItemStack>> stacks = ((IngredientInterface) (Object) ingredient).getRecipeStacks();
+                            if (stacks.isEmpty())
+                            {
+                                ingredientValue.add(Value.NULL);
+                            }
+                            else
+                            {
+                                List<Value> alternatives = new ArrayList<>();
+                                stacks.forEach(col -> col.stream().map(ListValue::fromItemStack).forEach(alternatives::add));
+                                ingredientValue.add(ListValue.wrap(alternatives));
+                            }
+                        }
+                );
+                Value recipeSpec;
+                if (recipe instanceof ShapedRecipe)
+                {
+                    recipeSpec = ListValue.of(
+                            new StringValue("shaped"),
+                            new NumericValue(((ShapedRecipe) recipe).getWidth()),
+                            new NumericValue(((ShapedRecipe) recipe).getHeight())
+                    );
+                }
+                else if (recipe instanceof ShapelessRecipe)
+                {
+                    recipeSpec = ListValue.of(new StringValue("shapeless"));
+                }
+                else if (recipe instanceof AbstractCookingRecipe)
+                {
+                    recipeSpec = ListValue.of(
+                            new StringValue("smelting"),
+                            new NumericValue(((AbstractCookingRecipe) recipe).getCookTime()),
+                            new NumericValue(((AbstractCookingRecipe) recipe).getExperience())
+                    );
+                }
+                else if (recipe instanceof CuttingRecipe)
+                {
+                    recipeSpec = ListValue.of(new StringValue("cutting"));
+                }
+                else if (recipe instanceof SpecialCraftingRecipe)
+                {
+                    recipeSpec = ListValue.of(new StringValue("special"));
+                }
+                else
+                {
+                    recipeSpec = ListValue.of(new StringValue("custom"));
+                }
+
+                recipesOutput.add(ListValue.of(ListValue.fromItemStack(result), ListValue.wrap(ingredientValue), recipeSpec));
+            }
+            Value ret = ListValue.wrap(recipesOutput);
+            return (_c, _t) -> ret;
+        });
+
+        this.expr.addLazyFunction("crafting_remaining_item", 1, (c, t, lv) ->
+        {
+            String itemStr = lv.get(0).evalValue(c).getString();
+            Item item;
+            try
+            {
+                Identifier id = new Identifier(itemStr);
+                item = Registry.ITEM.get(id);
+                if (item == Items.AIR && !id.getPath().equalsIgnoreCase("air"))
+                    throw new InvalidIdentifierException("boo");
+            }
+            catch (InvalidIdentifierException ignored)
+            {
+                throw new InternalExpressionException("Incorrect item: "+itemStr);
+            }
+            if (!item.hasRecipeRemainder()) return LazyValue.NULL;
+            Value ret = new StringValue(NBTSerializableValue.nameFromRegistryId(Registry.ITEM.getId(item.getRecipeRemainder())));
+            return (_c, _t ) -> ret;
+        });
+
+
         this.expr.addLazyFunction("inventory_size", -1, (c, t, lv) ->
         {
             CarpetContext cc = (CarpetContext) c;

src/main/resources/carpet.accesswidener

@@ -0,0 +1,2 @@
+accessWidener	v1  named
+Accessible class net/minecraft/recipe/Ingredient$Entry

src/main/resources/carpet.mixins.json

@@ -157,6 +157,9 @@
     "ServerWorld_scarpetEventMixin",
     "HungerManagerMixin_scarpetEventsMixin",
 
+    "RecipeManager_scarpetMixin",
+    "Ingredient_scarpetMixin",
+
     "PistonBlock_movableTEMixin",
     "PistonBlockEntity_movableTEMixin",
     "World_movableTEMixin",

src/main/resources/fabric.mod.json

@@ -24,6 +24,7 @@
   "mixins": [
     "carpet.mixins.json"
   ],
+  "accessWidener" : "carpet.accesswidener",
 
   "depends": {
     "minecraft": "1.15.x",