2 files changed, 20 insertions, 10 deletions
diff --git a/src/main/java/gregtech/common/covers/GT_Cover_ControlsWork.java b/src/main/java/gregtech/common/covers/GT_Cover_ControlsWork.java
index e90751e390..270a221a08 100644
--- a/src/main/java/gregtech/common/covers/GT_Cover_ControlsWork.java
+++ b/src/main/java/gregtech/common/covers/GT_Cover_ControlsWork.java
@@ -5,6 +5,7 @@ import com.gtnewhorizons.modularui.common.widget.TextWidget;
 import gregtech.api.gui.modularui.GT_CoverUIBuildContext;
 import gregtech.api.gui.modularui.GT_UITextures;
 import gregtech.api.interfaces.ITexture;
+import gregtech.api.interfaces.covers.IControlsWorkCover;
 import gregtech.api.interfaces.tileentity.ICoverable;
 import gregtech.api.interfaces.tileentity.IMachineProgress;
 import gregtech.api.util.GT_CoverBehavior;
@@ -16,7 +17,7 @@ import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.ItemStack;
 import net.minecraftforge.fluids.Fluid;
 
-public class GT_Cover_ControlsWork extends GT_CoverBehavior {
+public class GT_Cover_ControlsWork extends GT_CoverBehavior implements IControlsWorkCover {
 
     /**
      * @deprecated use {@link #GT_Cover_ControlsWork(ITexture coverTexture)} instead
@@ -79,17 +80,11 @@ public class GT_Cover_ControlsWork extends GT_CoverBehavior {
 
     /**
      * Make sure there is only one GT_Cover_ControlsWork on the aTileEntity
+     * TODO this is a migration thing. Remove this after 2.3.0 is released.
      * @return true if the cover is the first (side) one
      **/
     private boolean makeSureOnlyOne(byte aSide, ICoverable aTileEntity) {
-        for (byte i = 0; i < 6; i++) {
-            if (aTileEntity.getCoverBehaviorAtSideNew(i) instanceof GT_Cover_ControlsWork && i < aSide) {
-                aTileEntity.dropCover(aSide, aSide, true);
-                aTileEntity.markDirty();
-                return false;
-            }
-        }
-        return true;
+        return IControlsWorkCover.makeSureOnlyOne(aSide, aTileEntity);
     }
 
     @Override
@@ -174,7 +169,7 @@ public class GT_Cover_ControlsWork extends GT_CoverBehavior {
     public boolean isCoverPlaceable(byte aSide, ItemStack aStack, ICoverable aTileEntity) {
         if (!super.isCoverPlaceable(aSide, aStack, aTileEntity)) return false;
         for (byte i = 0; i < 6; i++) {
-            if (aTileEntity.getCoverBehaviorAtSideNew(i) instanceof GT_Cover_ControlsWork) {
+            if (aTileEntity.getCoverBehaviorAtSideNew(i) instanceof IControlsWorkCover) {
                 return false;
             }
         }
diff --git a/src/main/java/gregtech/common/covers/GT_Cover_RedstoneTransmitterExternal.java b/src/main/java/gregtech/common/covers/GT_Cover_RedstoneTransmitterExternal.java
index a8af72530e..92445fa038 100644
--- a/src/main/java/gregtech/common/covers/GT_Cover_RedstoneTransmitterExternal.java
+++ b/src/main/java/gregtech/common/covers/GT_Cover_RedstoneTransmitterExternal.java
@@ -2,8 +2,10 @@ package gregtech.common.covers;
 
 import gregtech.api.GregTech_API;
 import gregtech.api.interfaces.ITexture;
+import gregtech.api.interfaces.covers.IControlsWorkCover;
 import gregtech.api.interfaces.tileentity.ICoverable;
 import gregtech.api.util.ISerializableObject;
+import net.minecraft.item.ItemStack;
 
 public class GT_Cover_RedstoneTransmitterExternal extends GT_Cover_RedstoneWirelessBase {
 
@@ -22,6 +24,8 @@ public class GT_Cover_RedstoneTransmitterExternal extends GT_Cover_RedstoneWirel
     @Override
     public int doCoverThings(
             byte aSide, byte aInputRedstone, int aCoverID, int aCoverVariable, ICoverable aTileEntity, long aTimer) {
+        // TODO remove next line after 2.3.0
+        if (!IControlsWorkCover.makeSureOnlyOne(aSide, aTileEntity)) return aCoverVariable;
         GregTech_API.sWirelessRedstone.put(aCoverVariable, aInputRedstone);
         return aCoverVariable;
     }
@@ -45,4 +49,15 @@ public class GT_Cover_RedstoneTransmitterExternal extends GT_Cover_RedstoneWirel
     public int getTickRate(byte aSide, int aCoverID, int aCoverVariable, ICoverable aTileEntity) {
         return 1;
     }
+
+    @Override
+    public boolean isCoverPlaceable(byte aSide, ItemStack aStack, ICoverable aTileEntity) {
+        if (!super.isCoverPlaceable(aSide, aStack, aTileEntity)) return false;
+        for (byte i = 0; i < 6; i++) {
+            if (aTileEntity.getCoverBehaviorAtSideNew(i) instanceof IControlsWorkCover) {
+                return false;
+            }
+        }
+        return true;
+    }
 }