Change Terminal to cache inventories instead of items directly

src/main/kotlin/net/shadowfacts/phycon/network/DeviceBlock.kt

@@ -0,0 +1,19 @@
+package net.shadowfacts.phycon.network
+
+import net.minecraft.block.BlockState
+import net.minecraft.entity.player.PlayerEntity
+import net.minecraft.util.math.BlockPos
+import net.minecraft.world.World
+import net.shadowfacts.phycon.block.BlockWithEntity
+
+/**
+ * @author shadowfacts
+ */
+abstract class DeviceBlock<T: DeviceBlockEntity>(settings: Settings): BlockWithEntity<T>(settings) {
+
+	override fun onBreak(world: World, pos: BlockPos, state: BlockState, player: PlayerEntity) {
+		super.onBreak(world, pos, state, player)
+		getBlockEntity(world, pos)!!.onBreak()
+	}
+
+}

src/main/kotlin/net/shadowfacts/phycon/network/DeviceBlockEntity.kt

@@ -7,6 +7,7 @@ import net.minecraft.util.Tickable
 import net.shadowfacts.phycon.api.PacketSink
 import net.shadowfacts.phycon.api.packet.Packet
 import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.network.packet.DeviceRemovedPacket
 import java.lang.ref.WeakReference
 import java.util.*
 
@@ -84,4 +85,8 @@ abstract class DeviceBlockEntity(type: BlockEntityType<*>): BlockEntity(type), T
 		macAddress = MACAddress(tag.getLong("MACAddress"))
 	}
 
+	fun onBreak() {
+		enqueueToAll(DeviceRemovedPacket(this))
+	}
+
 }

src/main/kotlin/net/shadowfacts/phycon/network/block/terminal/TerminalBlockEntity.kt

@@ -1,36 +1,55 @@
 package net.shadowfacts.phycon.network.block.terminal
 
 import alexiil.mc.lib.attributes.item.ItemStackCollections
+import it.unimi.dsi.fastutil.objects.Object2IntMap
 import net.minecraft.item.ItemStack
 import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.api.util.MACAddress
 import net.shadowfacts.phycon.init.PhyBlockEntities
 import net.shadowfacts.phycon.network.DeviceBlockEntity
+import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlockEntity
+import net.shadowfacts.phycon.network.packet.DeviceRemovedPacket
 import net.shadowfacts.phycon.network.packet.ReadAllPacket
 import net.shadowfacts.phycon.network.packet.RequestReadAllPacket
+import java.util.*
 
 /**
  * @author shadowfacts
  */
 class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL) {
 
-	private var cachedItems = ItemStackCollections.intMap()
+	private val inventoryCache = mutableMapOf<MACAddress, Map<ItemStack, Int>>()
 
 	override fun handlePacket(packet: Packet) {
 		when (packet) {
 			is ReadAllPacket -> handleReadAll(packet)
+			is DeviceRemovedPacket -> handleDeviceRemoved(packet)
 		}
 	}
 
-	fun handleReadAll(packet: ReadAllPacket) {
-		packet.items.forEach { (stack, amount) ->
-			cachedItems.mergeInt(stack, amount) { a, b -> a + b }
+	private fun handleReadAll(packet: ReadAllPacket) {
+		inventoryCache[packet.source] = packet.items
+
+		println("new items: ${computeNetItems()}")
+	}
+
+	private fun handleDeviceRemoved(packet: DeviceRemovedPacket) {
+		inventoryCache.remove(packet.source)
+	}
+
+	fun computeNetItems(): Map<ItemStack, Int> {
+		val net = ItemStackCollections.intMap()
+		for (map in inventoryCache.values) {
+			for ((stack, amount) in map) {
+				net.mergeInt(stack, amount) { a, b -> a + b }
+			}
 		}
-		println("new cached items: $cachedItems")
+		return net
 	}
 
 	fun onActivate() {
 		if (!world!!.isClient) {
-			cachedItems.clear()
+			inventoryCache.clear()
 			enqueueToSingle(RequestReadAllPacket(macAddress))
 		}
 	}

src/main/kotlin/net/shadowfacts/phycon/network/packet/DeviceRemovedPacket.kt

@@ -0,0 +1,11 @@
+package net.shadowfacts.phycon.network.packet
+
+import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.network.DeviceBlockEntity
+
+/**
+ * @author shadowfacts
+ */
+class DeviceRemovedPacket(source: MACAddress, destination: MACAddress = MACAddress.BROADCAST): BasePacket(source, destination) {
+	constructor(device: DeviceBlockEntity): this(device.macAddress)
+}