feat: add infinite source/sink capability to creative tanks

src/main/java/com/gregtechceu/gtceu/api/transfer/fluid/InfiniteFluidTransferProxy.java

@@ -0,0 +1,39 @@
+package com.gregtechceu.gtceu.api.transfer.fluid;
+
+import com.lowdragmc.lowdraglib.side.fluid.FluidStack;
+import com.lowdragmc.lowdraglib.side.fluid.IFluidTransfer;
+import net.minecraft.MethodsReturnNonnullByDefault;
+import org.jetbrains.annotations.NotNull;
+
+import javax.annotation.ParametersAreNonnullByDefault;
+
+@MethodsReturnNonnullByDefault
+@ParametersAreNonnullByDefault
+public class InfiniteFluidTransferProxy extends FluidTransferDelegate {
+    private final boolean infiniteSource;
+    private final boolean infiniteSink;
+
+    public InfiniteFluidTransferProxy(IFluidTransfer delegate, boolean infiniteSource, boolean infiniteSink) {
+        super(delegate);
+
+        this.infiniteSource = infiniteSource;
+        this.infiniteSink = infiniteSink;
+    }
+
+    @Override
+    public long fill(int tank, FluidStack resource, boolean simulate, boolean notifyChanges) {
+        if (infiniteSink)
+            return resource.getAmount();
+
+        return super.fill(tank, resource, simulate, notifyChanges);
+    }
+
+    @NotNull
+    @Override
+    public FluidStack drain(int tank, FluidStack resource, boolean simulate, boolean notifyChanges) {
+        if (infiniteSource)
+            return resource.copy();
+
+        return super.drain(tank, resource, simulate, notifyChanges);
+    }
+}

src/main/java/com/gregtechceu/gtceu/common/machine/storage/CreativeTankMachine.java

@@ -5,7 +5,9 @@
 import com.gregtechceu.gtceu.api.gui.GuiTextures;
 import com.gregtechceu.gtceu.api.machine.IMachineBlockEntity;
 import com.gregtechceu.gtceu.api.machine.MetaMachine;
+import com.gregtechceu.gtceu.api.machine.trait.ICapabilityTrait;
 import com.gregtechceu.gtceu.api.machine.trait.NotifiableFluidTank;
+import com.gregtechceu.gtceu.api.transfer.fluid.InfiniteFluidTransferProxy;
 import com.lowdragmc.lowdraglib.gui.texture.GuiTextureGroup;
 import com.lowdragmc.lowdraglib.gui.texture.ResourceBorderTexture;
 import com.lowdragmc.lowdraglib.gui.texture.TextTexture;
@@ -16,6 +18,10 @@
 import com.lowdragmc.lowdraglib.syncdata.annotation.DropSaved;
 import com.lowdragmc.lowdraglib.syncdata.annotation.Persisted;
 import com.lowdragmc.lowdraglib.syncdata.field.ManagedFieldHolder;
+import net.minecraft.core.Direction;
+import net.minecraftforge.fluids.capability.IFluidHandler;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 public class CreativeTankMachine extends QuantumTankMachine {
     public static final ManagedFieldHolder MANAGED_FIELD_HOLDER = new ManagedFieldHolder(CreativeTankMachine.class, QuantumTankMachine.MANAGED_FIELD_HOLDER);
@@ -25,11 +31,22 @@ public class CreativeTankMachine extends QuantumTankMachine {
     @Persisted @DropSaved
     private int ticksPerCycle = 1;
 
+    private final InfiniteFluidTransferProxy capabilityTransferProxy;
+
     public CreativeTankMachine(IMachineBlockEntity holder) {
         super(holder, GTValues.MAX, -1);
+
+        capabilityTransferProxy = new InfiniteFluidTransferProxy(cache, true, true);
     }
 
+    @Nullable
+    @Override
+    public IFluidTransfer getFluidTransferCap(@Nullable Direction side, boolean useCoverCapability) {
+        if (side == null || (useCoverCapability && coverContainer.hasCover(side)))
+            return super.getFluidTransferCap(side, useCoverCapability);
 
+        return capabilityTransferProxy;
+    }
 
     protected NotifiableFluidTank createCacheFluidHandler(Object... args) {
         return new NotifiableFluidTank(this, 1, 1000, IO.BOTH, IO.NONE);