Add Drag-And-Drop support for digital tank (#1333)

* Add Drag-And-Drop support for digital tank

* lockedFluidName is null in old save

1 files changed, 29 insertions, 0 deletions

diff --git a/src/main/java/gregtech/api/interfaces/metatileentity/IFluidLockable.java b/src/main/java/gregtech/api/interfaces/metatileentity/IFluidLockable.java
new file mode 100644
index 0000000000..688a85b521
--- /dev/null
+++ b/src/main/java/gregtech/api/interfaces/metatileentity/IFluidLockable.java
@@ -0,0 +1,29 @@
+package gregtech.api.interfaces.metatileentity;
+
+import net.minecraftforge.fluids.Fluid;
+
+/**
+ * Implement this interface if your MetaTileEntity supports fluid lock mechanism.
+ */
+@SuppressWarnings({"BooleanMethodIsAlwaysInverted", "unused"})
+public interface IFluidLockable {
+
+    /**
+     * Use {@link Fluid#getName()} instead of {@link Fluid#getUnlocalizedName()} for fluid name
+     */
+    void setLockedFluidName(String name);
+
+    String getLockedFluidName();
+
+    /**
+     * Set fluid lock state.
+     * Would be useful when you don't necessarily want to change mode when locked fluid is changed.
+     */
+    void lockFluid(boolean lock);
+
+    boolean isFluidLocked();
+
+    boolean allowChangingLockedFluid(String name);
+
+    default void onFluidLockPacketReceived(String name) {}
+}