1 files changed, 56 insertions, 0 deletions
diff --git a/src/main/java/io/github/moulberry/repo/NEURecipeCache.java b/src/main/java/io/github/moulberry/repo/NEURecipeCache.java
new file mode 100644
index 0000000..50e0481
--- /dev/null
+++ b/src/main/java/io/github/moulberry/repo/NEURecipeCache.java
@@ -0,0 +1,56 @@
+package io.github.moulberry.repo;
+
+import io.github.moulberry.repo.data.NEUIngredient;
+import io.github.moulberry.repo.data.NEUItem;
+import io.github.moulberry.repo.data.NEURecipe;
+import lombok.Getter;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public class NEURecipeCache implements IReloadable {
+
+    private NEURecipeCache() {
+    }
+
+    /**
+     * Create a recipe cache.
+     *
+     * @param repository the repository for which to create a recipe cache
+     *
+     * @return an unitialized repository cache, that can be initialized by calling {@link NEURepository#reload()}, or by
+     * manually {{@link #reload}ing it.}
+     */
+    public static NEURecipeCache forRepo(NEURepository repository) {
+        NEURecipeCache neuRecipeCache = new NEURecipeCache();
+        repository.registerReloadListener(neuRecipeCache);
+        return neuRecipeCache;
+    }
+
+
+    @Getter
+    Map<String, Set<NEURecipe>> recipes = new HashMap<>();
+    @Getter
+    Map<String, Set<NEURecipe>> usages = new HashMap<>();
+
+
+    @Override
+    public void reload(NEURepository repository) throws NEURepositoryException {
+        Map<String, Set<NEURecipe>> recipes = new HashMap<>();
+        Map<String, Set<NEURecipe>> usages = new HashMap<>();
+        for (NEUItem item : repository.getItems().getItems().values()) {
+            for (NEURecipe recipe : item.getRecipes()) {
+                for (NEUIngredient input : recipe.getAllInputs()) {
+                    usages.computeIfAbsent(input.getItemId(), ignored -> new HashSet<>()).add(recipe);
+                }
+                for (NEUIngredient output : recipe.getAllOutputs()) {
+                    recipes.computeIfAbsent(output.getItemId(), ignored -> new HashSet<>()).add(recipe);
+                }
+            }
+        }
+        this.recipes = recipes;
+        this.usages = usages;
+    }
+}