Adds item and charging info to Locker WAILA panel (#2245)

* Adds item and charging info to Locker WAILA panel

* Refactor Locker WAILA tip entries to happen more on client side

1 files changed, 31 insertions, 0 deletions

diff --git a/src/main/java/gregtech/api/util/GT_ModHandler.java b/src/main/java/gregtech/api/util/GT_ModHandler.java
index 68f1bd9b97..5201cc6876 100644
--- a/src/main/java/gregtech/api/util/GT_ModHandler.java
+++ b/src/main/java/gregtech/api/util/GT_ModHandler.java
@@ -22,6 +22,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Objects;
+import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
 
@@ -63,6 +64,7 @@ import gregtech.api.enums.ToolDictNames;
 import gregtech.api.interfaces.IDamagableItem;
 import gregtech.api.interfaces.IItemContainer;
 import gregtech.api.interfaces.internal.IGT_CraftingRecipe;
+import gregtech.api.items.GT_MetaBase_Item;
 import gregtech.api.objects.GT_HashSet;
 import gregtech.api.objects.GT_ItemStack;
 import gregtech.api.objects.ItemData;
@@ -2328,6 +2330,35 @@ public class GT_ModHandler {
     }
 
     /**
+     * Returns the current charge and maximum charge of an ItemStack.
+     *
+     * @param aStack Any ItemStack.
+     * @return Optional.empty() if the stack is null or not an electric item, or an Optional containing a payload of an
+     *         array containing [ current_charge, maximum_charge ] on success.
+     */
+    public static Optional<Long[]> getElectricItemCharge(ItemStack aStack) {
+        if (aStack == null || !isElectricItem(aStack)) {
+            return Optional.empty();
+        }
+
+        final Item item = aStack.getItem();
+
+        if (item instanceof final GT_MetaBase_Item metaBaseItem) {
+            final Long[] stats = metaBaseItem.getElectricStats(aStack);
+            if (stats != null && stats.length > 0) {
+                return Optional.of(new Long[] { metaBaseItem.getRealCharge(aStack), stats[0] });
+            }
+
+        } else if (item instanceof final IElectricItem ic2ElectricItem) {
+            return Optional.of(
+                new Long[] { (long) ic2.api.item.ElectricItem.manager.getCharge(aStack),
+                    (long) ic2ElectricItem.getMaxCharge(aStack) });
+        }
+
+        return Optional.empty();
+    }
+
+    /**
      * Allow item to be inserted into ic2 toolbox
      */
     public static void registerBoxableItemToToolBox(ItemStack aStack) {