1 files changed, 58 insertions, 0 deletions
diff --git a/api/src/main/java/me/shedaniel/rei/server/DumpHandler.java b/api/src/main/java/me/shedaniel/rei/server/DumpHandler.java
new file mode 100644
index 000000000..9db906ee3
--- /dev/null
+++ b/api/src/main/java/me/shedaniel/rei/server/DumpHandler.java
@@ -0,0 +1,58 @@
+/*
+ * This file is licensed under the MIT License, part of Roughly Enough Items.
+ * Copyright (c) 2018, 2019, 2020 shedaniel
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package me.shedaniel.rei.server;
+
+import net.minecraft.world.inventory.AbstractContainerMenu;
+import net.minecraft.world.item.ItemStack;
+
+import java.util.List;
+
+@FunctionalInterface
+public interface DumpHandler<T extends AbstractContainerMenu> {
+    boolean dump(ContainerContext<T> context, ItemStack stackToInsert);
+    
+    static StackAccessor getOccupiedSlotWithRoomForStack(ItemStack stack, List<StackAccessor> inventoryStacks) {
+        for (StackAccessor inventoryStack : inventoryStacks) {
+            if (canStackAddMore(inventoryStack.getItemStack(), stack)) {
+                return inventoryStack;
+            }
+        }
+        
+        return null;
+    }
+    
+    static StackAccessor getEmptySlot(List<StackAccessor> inventoryStacks) {
+        for (StackAccessor inventoryStack : inventoryStacks) {
+            if (inventoryStack.getItemStack().isEmpty()) {
+                return inventoryStack;
+            }
+        }
+        
+        return null;
+    }
+    
+    static boolean canStackAddMore(ItemStack existingStack, ItemStack stack) {
+        return !existingStack.isEmpty() && ItemStack.isSameIgnoreDurability(existingStack, stack) && existingStack.isStackable() && existingStack.getCount() + stack.getCount() <= existingStack.getMaxStackSize();
+    }
+}