Super Tank Fluid Locking Fix (#1332)

* fix bugs

* spotless

* add null check

3 files changed, 12 insertions, 0 deletions

diff --git a/src/main/java/gregtech/api/gui/GT_Container.java b/src/main/java/gregtech/api/gui/GT_Container.java
index 083634f030..5d9dde3535 100644
--- a/src/main/java/gregtech/api/gui/GT_Container.java
+++ b/src/main/java/gregtech/api/gui/GT_Container.java
@@ -670,6 +670,7 @@ public class GT_Container extends Container {
             }
             replaceCursorItemStack(aPlayer, tFilledContainer);
         }
+        aFluidAccess.verifyFluidStack();
         return tFilledContainer;
     }
 
diff --git a/src/main/java/gregtech/api/gui/GT_Container_BasicTank.java b/src/main/java/gregtech/api/gui/GT_Container_BasicTank.java
index 6e4f5b8920..8d8d018cdc 100644
--- a/src/main/java/gregtech/api/gui/GT_Container_BasicTank.java
+++ b/src/main/java/gregtech/api/gui/GT_Container_BasicTank.java
@@ -119,6 +119,8 @@ public class GT_Container_BasicTank extends GT_ContainerMetaTile_Machine {
         public void set(FluidStack stack) {
             if (mIsFillableStack) mTank.setFillableStack(stack);
             else mTank.setDrainableStack(stack);
+            if (mTank instanceof GT_MetaTileEntity_DigitalTankBase)
+                ((GT_MetaTileEntity_DigitalTankBase) mTank).onEmptyingContainerWhenEmpty();
         }
 
         @Override
@@ -142,5 +144,10 @@ public class GT_Container_BasicTank extends GT_ContainerMetaTile_Machine {
         static BasicTankFluidAccess from(GT_MetaTileEntity_BasicTank aTank, boolean aIsFillableStack) {
             return new BasicTankFluidAccess(aTank, aIsFillableStack);
         }
+
+        @Override
+        public void verifyFluidStack() {
+            if (!(mTank instanceof GT_MetaTileEntity_DigitalTankBase) && get() != null && get().amount <= 0) set(null);
+        }
     }
 }
diff --git a/src/main/java/gregtech/api/interfaces/IFluidAccess.java b/src/main/java/gregtech/api/interfaces/IFluidAccess.java
index 01b6fb6d0b..8fa9b3a3fa 100644
--- a/src/main/java/gregtech/api/interfaces/IFluidAccess.java
+++ b/src/main/java/gregtech/api/interfaces/IFluidAccess.java
@@ -19,4 +19,8 @@ public interface IFluidAccess {
             get().amount = Math.min(get().amount + amount, getRealCapacity());
         }
     }
+
+    default void verifyFluidStack() {
+        if (get() != null && get().amount <= 0) set(null);
+    }
 }