Terminal: Define separate mode for buffer inventory slots

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

@@ -14,13 +14,11 @@ import java.util.*
 /**
  * @author shadowfacts
  */
-abstract class DeviceBlockEntity(type: BlockEntityType<*>): BlockEntity(type), Tickable, PacketSink {
+abstract class DeviceBlockEntity(type: BlockEntityType<*>): BlockEntity(type), PacketSink {
 
 	var macAddress = MACAddress.random()
 		protected set
 
-	private val sendQueue = LinkedList<Pair<Packet, WeakReference<PacketSink>>>()
-
 	override fun getMACAddress(): MACAddress {
 		return macAddress
 	}
@@ -33,7 +31,7 @@ abstract class DeviceBlockEntity(type: BlockEntityType<*>): BlockEntity(type), T
 
 	protected abstract fun handlePacket(packet: Packet)
 
-	fun acceptsPacket(packet: Packet): Boolean {
+	protected open fun acceptsPacket(packet: Packet): Boolean {
 		return when (packet.destination.type) {
 			MACAddress.Type.BROADCAST -> true
 			MACAddress.Type.UNICAST -> macAddress == packet.destination
@@ -45,33 +43,28 @@ abstract class DeviceBlockEntity(type: BlockEntityType<*>): BlockEntity(type), T
 		return false
 	}
 
-	fun enqueue(packet: Packet, destination: PacketSink) {
-		sendQueue.add(packet to WeakReference(destination))
+	fun send(packet: Packet, destination: PacketSink) {
+		destination.handle(packet)
 	}
 
 	// todo: better name for this
-	fun enqueueToSingle(packet: Packet) {
+	fun sendToSingle(packet: Packet) {
 		val destinations = NetworkUtil.findDestinations(world!!, pos)
 		if (destinations.size != 1) {
 			// todo: handle this better
 			println("Can't send packet, multiple destinations available: $destinations")
 			return
 		}
-		enqueue(packet, destinations.first())
+		send(packet, destinations.first())
 	}
 
-	fun enqueueToAll(packet: Packet) {
-		enqueueToAll(packet, NetworkUtil.findDestinations(world!!, pos))
+	fun sendToAll(packet: Packet) {
+		sendToAll(packet, NetworkUtil.findDestinations(world!!, pos))
 	}
 
-	fun enqueueToAll(packet: Packet, destinations: Iterable<PacketSink>) {
-		sendQueue.addAll(destinations.map { packet to WeakReference(it) })
-	}
-
-	override fun tick() {
-		if (sendQueue.isNotEmpty()) {
-			val (packet, destination) = sendQueue.pop()
-			destination.get()?.handle(packet)
+	fun sendToAll(packet: Packet, destinations: Iterable<PacketSink>) {
+		destinations.forEach {
+			it.handle(packet)
 		}
 	}
 
@@ -86,7 +79,7 @@ abstract class DeviceBlockEntity(type: BlockEntityType<*>): BlockEntity(type), T
 	}
 
 	fun onBreak() {
-		enqueueToAll(DeviceRemovedPacket(this))
+		sendToAll(DeviceRemovedPacket(this))
 	}
 
 }

src/main/kotlin/net/shadowfacts/phycon/network/block/netinterface/InterfaceBlockEntity.kt

@@ -43,21 +43,21 @@ class InterfaceBlockEntity: DeviceBlockEntity(PhyBlockEntities.INTERFACE) {
 
 	private fun handleRequestInventory(packet: RequestInventoryPacket) {
 		getInventory()?.also { inv ->
-			enqueueToSingle(ReadInventoryPacket(inv, macAddress, packet.source))
+			sendToSingle(ReadInventoryPacket(inv, macAddress, packet.source))
 		}
 	}
 
 	private fun handleLocateStack(packet: LocateStackPacket) {
 		getInventory()?.also { inv ->
 			val amount = inv.getAmount(packet.stack)
-			enqueueToSingle(StackLocationPacket(packet.stack, amount, this, macAddress, packet.source))
+			sendToSingle(StackLocationPacket(packet.stack, amount, this, macAddress, packet.source))
 		}
 	}
 
 	private fun handleExtractStack(packet: ExtractStackPacket) {
 		getInventory()?.also { inv ->
 			val extracted = inv.extract(packet.stack, packet.amount)
-			enqueueToSingle(ItemStackPacket(extracted, macAddress, packet.source))
+			sendToSingle(ItemStackPacket(extracted, macAddress, packet.source))
 		}
 	}
 

src/main/kotlin/net/shadowfacts/phycon/network/block/netswitch/SwitchBlockEntity.kt

@@ -1,5 +1,7 @@
 package net.shadowfacts.phycon.network.block.netswitch
 
+import net.minecraft.entity.ItemEntity
+import net.minecraft.util.Tickable
 import net.minecraft.util.math.Direction
 import net.shadowfacts.phycon.api.PacketSink
 import net.shadowfacts.phycon.api.packet.Packet
@@ -7,30 +9,44 @@ import net.shadowfacts.phycon.api.util.MACAddress
 import net.shadowfacts.phycon.init.PhyBlockEntities
 import net.shadowfacts.phycon.network.DeviceBlockEntity
 import net.shadowfacts.phycon.network.NetworkUtil
+import net.shadowfacts.phycon.network.packet.ItemStackPacket
 import java.lang.RuntimeException
-import javax.print.attribute.standard.Destination
 
 /**
  * @author shadowfacts
  */
-class SwitchBlockEntity: DeviceBlockEntity(PhyBlockEntities.SWITCH) {
+class SwitchBlockEntity: DeviceBlockEntity(PhyBlockEntities.SWITCH), Tickable {
 
-	private val macTable = mutableMapOf<MACAddress, Direction>()
-
-	override fun handlePacket(packet: Packet) {
-		throw RuntimeException("Unreachable")
+	companion object {
+		var SWITCHING_CAPACITY = 256
 	}
 
-	override fun handle(packet: Packet) {
+	private val macTable = mutableMapOf<MACAddress, Direction>()
+	private var packetsHandledThisTick = 0
+
+	override fun acceptsPacket(packet: Packet) = true
+
+	override fun handlePacket(packet: Packet) {
+		if (packetsHandledThisTick >= SWITCHING_CAPACITY) {
+			if (packet is ItemStackPacket) {
+				// todo: calculate entity spawn point by finding non-obstructed location
+				val entity = ItemEntity(world!!, pos.x.toDouble(), pos.y + 1.0, pos.z.toDouble(), packet.stack)
+				world!!.spawnEntity(entity)
+			}
+			return
+		}
+
+		packetsHandledThisTick++
+
 		if (packet.destination == MACAddress.BROADCAST) {
 			val allDestinations = NetworkUtil.findDestinations(world!!, pos).filter { it.macAddress != packet.source }
-			enqueueToAll(packet, allDestinations)
+			sendToAll(packet, allDestinations)
 		} else {
 			val direction = macTable[packet.destination]
 			if (direction != null) {
 				val dest = findDestination(direction)
 				if (dest != null && packet.destination == dest.macAddress) {
-					enqueue(packet, dest)
+					send(packet, dest)
 					return
 				}
 			}
@@ -53,10 +69,14 @@ class SwitchBlockEntity: DeviceBlockEntity(PhyBlockEntities.SWITCH) {
 			val dest = findDestination(dir)
 			if (dest != null && packet.destination == dest.macAddress) {
 				macTable[packet.destination] = dir
-				enqueue(packet, dest)
+				send(packet, dest)
 				break
 			}
 		}
 	}
 
+	override fun tick() {
+		packetsHandledThisTick = 0
+	}
+
 }

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

@@ -13,6 +13,7 @@ import net.minecraft.inventory.InventoryListener
 import net.minecraft.item.ItemStack
 import net.minecraft.nbt.CompoundTag
 import net.minecraft.nbt.ListTag
+import net.minecraft.util.Tickable
 import net.shadowfacts.phycon.api.packet.Packet
 import net.shadowfacts.phycon.api.util.MACAddress
 import net.shadowfacts.phycon.init.PhyBlockEntities
@@ -20,6 +21,7 @@ import net.shadowfacts.phycon.network.DeviceBlockEntity
 import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlockEntity
 import net.shadowfacts.phycon.network.packet.*
 import net.shadowfacts.phycon.util.fromTag
+import net.shadowfacts.phycon.util.insert
 import net.shadowfacts.phycon.util.toTag
 import java.util.*
 import kotlin.math.min
@@ -27,14 +29,14 @@ import kotlin.math.min
 /**
  * @author shadowfacts
  */
-class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), InventoryListener, BlockEntityClientSerializable {
+class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), InventoryListener, BlockEntityClientSerializable, Tickable {
 
 	companion object {
 		val LOCATE_REQUEST_TIMEOUT = 40 // ticks
 	}
 
 	private val inventoryCache = mutableMapOf<MACAddress, GroupedItemInv>()
-	val internalBuffer = BasicInventory(18)
+	val internalBuffer = TerminalBufferInventory(18)
 
 	private val pendingRequests = LinkedList<StackLocateRequest>()
 
@@ -82,16 +84,12 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 	}
 
 	private fun handleItemStack(packet: ItemStackPacket) {
-		// todo: handle merging stacks into the buffer better?
-		for (i in 0 until internalBuffer.invSize) {
-			if (internalBuffer.getInvStack(i).isEmpty) {
-				internalBuffer.setInvStack(i, packet.stack)
-				return
-			}
+		val remaining = internalBuffer.insertFromNetwork(packet.stack)
+		if (!remaining.isEmpty) {
+			// todo: calculate entity spawn point by finding non-obstructed location
+			val entity = ItemEntity(world!!, pos.x.toDouble(), pos.y + 1.0, pos.z.toDouble(), remaining)
+			world!!.spawnEntity(entity)
 		}
-		// todo: calculate entity spawn point by finding non-obstructed location
-		val entity = ItemEntity(world!!, pos.x.toDouble(), pos.y + 1.0, pos.z.toDouble(), packet.stack)
-		world!!.spawnEntity(entity)
 	}
 
 	private fun updateNetItems() {
@@ -119,8 +117,6 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 	}
 
 	override fun tick() {
-		super.tick()
-
 		if (observers > 0 && (++counter % 20) == 0) {
 			if (world!!.isClient) {
 				println(cachedNetItems)
@@ -137,7 +133,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 			sync()
 
 			inventoryCache.clear()
-			enqueueToSingle(RequestInventoryPacket(macAddress))
+			sendToSingle(RequestInventoryPacket(macAddress))
 			ContainerProviderRegistry.INSTANCE.openContainer(TerminalContainer.ID, player) { buf ->
 				buf.writeBlockPos(pos)
 			}
@@ -147,7 +143,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 
 	fun requestItem(stack: ItemStack, amount: Int = stack.count) {
 		pendingRequests.add(StackLocateRequest(stack, amount, counter))
-		enqueueToSingle(LocateStackPacket(stack, macAddress))
+		sendToSingle(LocateStackPacket(stack, macAddress))
 	}
 
 	private fun stackLocateRequestCompleted(request: StackLocateRequest) {
@@ -158,12 +154,12 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 			val (sourceAmount, sourceInterface) = sortedResults.removeAt(0)
 			val amountToRequest = min(sourceAmount, request.amount - amountRequested)
 			amountRequested += amountToRequest
-			enqueueToSingle(ExtractStackPacket(request.stack, amountToRequest, macAddress, sourceInterface.macAddress))
+			sendToSingle(ExtractStackPacket(request.stack, amountToRequest, macAddress, sourceInterface.macAddress))
 		}
 	}
 
 	override fun onInvChange(inv: Inventory) {
-		if (inv == internalBuffer && !world!!.isClient) {
+		if (inv == internalBuffer && world != null && !world!!.isClient) {
 			markDirty()
 			sync()
 		}

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

@@ -0,0 +1,59 @@
+package net.shadowfacts.phycon.network.block.terminal
+
+import alexiil.mc.lib.attributes.item.ItemStackUtil
+import net.minecraft.inventory.BasicInventory
+import net.minecraft.item.ItemStack
+import kotlin.math.min
+
+/**
+ * @author shadowfacts
+ */
+class TerminalBufferInventory(size: Int): BasicInventory(size) {
+
+	enum class Mode {
+		TO_NETWORK, FROM_NETWORK, UNASSIGNED
+	}
+
+	private val modes = Array(size) { Mode.UNASSIGNED }
+
+	fun insertFromNetwork(stack: ItemStack): ItemStack {
+		var remaining = stack.copy()
+		for (slot in 0 until invSize) {
+			if (modes[slot] == Mode.TO_NETWORK) continue
+
+			remaining = insertFromNetwork(stack, slot)
+
+			if (remaining.isEmpty) {
+				break
+			}
+		}
+		return remaining
+	}
+
+	private fun insertFromNetwork(stack: ItemStack, slot: Int): ItemStack {
+		val mode = modes[slot]
+		if (mode == Mode.TO_NETWORK) return stack
+		val current = getInvStack(slot)
+		if (current.isEmpty) {
+			setInvStack(slot, stack)
+			modes[slot] = Mode.FROM_NETWORK
+			return ItemStack.EMPTY
+		} else if (ItemStackUtil.areEqualIgnoreAmounts(stack, current)) {
+			val toTransfer = min(current.maxCount - current.count, stack.count)
+			current.count += toTransfer
+			stack.count -= toTransfer
+			modes[slot] = Mode.FROM_NETWORK
+			return stack
+		} else {
+			return stack
+		}
+	}
+
+	override fun setInvStack(slot: Int, stack: ItemStack) {
+		if (stack.isEmpty) {
+			modes[slot] = Mode.UNASSIGNED
+		}
+		super.setInvStack(slot, stack)
+	}
+
+}

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

@@ -8,7 +8,8 @@ import net.minecraft.entity.player.PlayerInventory
 import net.minecraft.item.ItemStack
 import net.minecraft.util.Identifier
 import net.shadowfacts.phycon.PhysicalConnectivity
-import kotlin.math.max
+import kotlin.math.ceil
+import kotlin.math.min
 
 /**
  * @author shadowfacts
@@ -57,16 +58,25 @@ class TerminalContainer(syncId: Int, playerInv: PlayerInventory, val terminal: T
 	}
 
 	override fun onSlotClick(slotId: Int, clickData: Int, actionType: SlotActionType, player: PlayerEntity): ItemStack {
-		if (actionType == SlotActionType.QUICK_MOVE) {
-			if (slotId < 54) {
-				// the slot clicked was one of the network stacks
-				val slot = slotList[slotId]
+		if (slotId in 0 until 54) {
+			// the slot clicked was one of the network stacks
+			if (actionType == SlotActionType.QUICK_MOVE) {
 				val stack = slotList[slotId].stack
 				if (!stack.isEmpty && !player.world.isClient) {
-					terminal.requestItem(stack, max(stack.count, stack.maxCount))
+					terminal.requestItem(stack, min(stack.count, stack.maxCount))
+				}
+			} else if (actionType == SlotActionType.PICKUP && clickData == 1) {
+				if (clickData == 1) {
+					// right click, request half stack
+					val stack = slotList[slotId].stack
+					if (!stack.isEmpty && !player.world.isClient) {
+						terminal.requestItem(stack, ceil(min(stack.count, stack.maxCount) / 2f).toInt())
+					}
+				} else {
+					// todo: left click, show amount dialog
 				}
-				return ItemStack.EMPTY
 			}
+			return ItemStack.EMPTY
 		}
 		return super.onSlotClick(slotId, clickData, actionType, player)
 	}

src/main/kotlin/net/shadowfacts/phycon/util/BasicInventoryExtensions.kt

@@ -1,10 +1,12 @@
 package net.shadowfacts.phycon.util
 
+import alexiil.mc.lib.attributes.item.ItemStackUtil
 import net.minecraft.inventory.BasicInventory
 import net.minecraft.item.ItemStack
 import net.minecraft.nbt.CompoundTag
 import net.minecraft.nbt.ListTag
 import java.lang.RuntimeException
+import kotlin.math.min
 
 /**
  * @author shadowfacts
@@ -32,3 +34,30 @@ fun BasicInventory.fromTag(list: ListTag) {
 		setInvStack(slot, stack)
 	}
 }
+
+fun BasicInventory.insert(stack: ItemStack, slot: Int): ItemStack {
+	@Suppress("NAME_SHADOWING") val stack = stack.copy()
+	val current = getInvStack(slot)
+	if (current.isEmpty) {
+		setInvStack(slot, stack)
+		return ItemStack.EMPTY
+	} else if (ItemStackUtil.areEqualIgnoreAmounts(stack, current)) {
+		val toTransfer = min(current.maxCount - current.count, stack.count)
+		current.count += toTransfer
+		stack.count -= toTransfer
+		return stack
+	} else {
+		return stack
+	}
+}
+
+fun BasicInventory.insert(stack: ItemStack): ItemStack {
+	var remaining = stack
+	for (slot in 0 until invSize) {
+		remaining = insert(stack, slot)
+		if (remaining.isEmpty) {
+			break
+		}
+	}
+	return remaining
+}