cables are fully cabling now

src/main/kotlin/org/neoflock/neocomputers/block/CableBlock.kt

@@ -165,6 +165,10 @@ class CableBlock() : DeviceBlock(Properties.of()), EntityBlock {
         if (stack.item is DyeItem) {
             val dyeitem = stack.item as DyeItem
             level.setBlockAndUpdate(pos, state.setValue(COLOR, dyeitem.dyeColor))
+            val ent = level.getBlockEntity(pos)
+            if(ent is CableEntity) {
+                ent.connectionsAreDirty = true
+            }
             return ItemInteractionResult.SUCCESS
         }
         return ItemInteractionResult.PASS_TO_DEFAULT_BLOCK_INTERACTION

src/main/kotlin/org/neoflock/neocomputers/block/DeviceBlock.kt

@@ -22,6 +22,7 @@ import net.minecraft.world.level.block.entity.BlockEntityTicker
 import net.minecraft.world.level.block.entity.BlockEntityType
 import net.minecraft.world.level.block.state.BlockState
 import net.minecraft.world.phys.BlockHitResult
+import org.neoflock.neocomputers.NeoComputers
 import org.neoflock.neocomputers.network.DeviceNode
 import org.neoflock.neocomputers.network.Networking
 import org.neoflock.neocomputers.network.NodeSynchronizer
@@ -35,6 +36,7 @@ abstract class SingleDeviceBlockEntity(type: BlockEntityType<*>, pos: BlockPos,
 
 abstract class DeviceBlockEntity(type: BlockEntityType<*>, pos: BlockPos, state: BlockState): BlockEntity(type, pos, state) {
     val connetionsInDir = MutableList<DeviceNode?>(Direction.entries.size) { null }
+    val nodesInDir = MutableList<DeviceNode?>(Direction.entries.size) { null }
     var alreadySetup = false
     var receivedServerState = false
     var connectionsAreDirty = true
@@ -77,11 +79,22 @@ abstract class DeviceBlockEntity(type: BlockEntityType<*>, pos: BlockPos, state:
 
     open fun handleConnectionsFor(direction: Direction) {
         // refuse connections on no node to reduce CPU load
-        val node = getNodeFromSide(direction) ?: return
+        val node = getNodeFromSide(direction)
+        val oldNode = nodesInDir[direction.ordinal]
+        nodesInDir[direction.ordinal] = node
         val old = connetionsInDir[direction.ordinal]
         val now = getCurrentlyConnectedNodeIn(direction)
+        if(node == null) {
+            if(old != null) oldNode?.disconnectFrom(old)
+            if(now != null) oldNode?.disconnectFrom(now)
+            return
+        }
+        if(oldNode != null && oldNode.address != node.address) {
+            if(old != null) oldNode.disconnectFrom(old)
+            if(now != null) oldNode.disconnectFrom(now)
+        }
 
-        if(old?.address != now?.address) {
+        if(old?.address != now?.address || oldNode == null) {
             if(old != null) node.disconnectFrom(old)
             if(now != null) node.connectTo(now)
         }

src/main/kotlin/org/neoflock/neocomputers/network/DeviceNode.kt

@@ -209,16 +209,18 @@ open class DeviceNode(_address: UUID? = null) {
     }
 
     fun directConnectTo(other: DeviceNode) {
-        if(other == this) return;
-        if(other in connections) return;
-        connections.add(other);
-        this.onConnect(other);
+        if(other == this) return
+        if(other in connections) return
+        connections.add(other)
+        this.onConnect(other)
+        invalidateReachableCache()
     }
 
     fun directDisconnectFrom(other: DeviceNode) {
-        if(other !in connections) return;
-        connections.remove(other);
-        this.onDisconnect(other);
+        if(other !in connections) return
+        connections.remove(other)
+        this.onDisconnect(other)
+        invalidateReachableCache()
     }
 
     // Network synchronization with the NodeSynchronizer