[WIP] Components

src/main/java/chylex/hee/game/entity/living/EntityMobAngryEnderman.kt

@@ -76,8 +76,8 @@ class EntityMobAngryEnderman(type: EntityType<EntityMobAngryEnderman>, world: Wo
 	}
 	
 	override fun updateAITasks() {
-		teleportHandler.update()
-		waterHandler.update()
+		teleportHandler.tickServer()
+		waterHandler.tickServer()
 		
 		val currentTarget = attackTarget
 		

src/main/java/chylex/hee/game/entity/living/EntityMobEnderman.kt

@@ -26,6 +26,10 @@ import chylex.hee.game.mechanics.causatum.events.CausatumEventEndermanKill
 import chylex.hee.game.world.playServer
 import chylex.hee.init.ModEntities
 import chylex.hee.init.ModSounds
+import chylex.hee.system.component.EntityComponents
+import chylex.hee.system.component.general.deserializeFrom
+import chylex.hee.system.component.general.serializeTo
+import chylex.hee.system.component.general.tick
 import chylex.hee.system.facades.Resource
 import chylex.hee.system.forge.SubscribeAllEvents
 import chylex.hee.system.forge.SubscribeEvent
@@ -76,8 +80,6 @@ class EntityMobEnderman(type: EntityType<EntityMobEnderman>, world: World) : Ent
 	
 	@SubscribeAllEvents(modid = HEE.ID)
 	companion object {
-		private const val TELEPORT_HANDLER_TAG = "Teleport"
-		private const val WATER_HANDLER_TAG = "Water"
 		private const val CAN_PICK_UP_BLOCKS_TAG = "CanPickUpBlocks"
 		private const val HELD_BLOCK_TIMER_TAG = "HeldBlockTimer"
 		private const val HELD_BLOCK_DESPAWNS_TAG = "HeldBlockDespawns"
@@ -202,8 +204,9 @@ class EntityMobEnderman(type: EntityType<EntityMobEnderman>, world: World) : Ent
 	
 	// Instance
 	
+	private lateinit var components: EntityComponents
+	
 	private lateinit var teleportHandler: EndermanTeleportHandler
-	private lateinit var waterHandler: EndermanWaterHandler
 	private lateinit var blockHandler: EndermanBlockHandler
 	
 	private lateinit var aiAttackTarget: AIToggle
@@ -227,6 +230,13 @@ class EntityMobEnderman(type: EntityType<EntityMobEnderman>, world: World) : Ent
 	
 	// Initialization
 	
+	override fun registerData() {
+		super.registerData()
+		
+		components = EntityComponents()
+		components.attach(EndermanWaterHandler(this, takeDamageAfterWetTicks = 80))
+	}
+	
 	override fun registerAttributes() {
 		super.registerAttributes()
 		
@@ -238,8 +248,7 @@ class EntityMobEnderman(type: EntityType<EntityMobEnderman>, world: World) : Ent
 	}
 	
 	override fun registerGoals() {
-		teleportHandler = EndermanTeleportHandler(this)
-		waterHandler = EndermanWaterHandler(this, takeDamageAfterWetTicks = 80)
+		teleportHandler = EndermanTeleportHandler(this).also(components::attach)
 		blockHandler = EndermanBlockHandler(this)
 		
 		aiWatchTargetInShock = AIWatchTargetInShock(this, maxDistance = 72.0)
@@ -265,10 +274,9 @@ class EntityMobEnderman(type: EntityType<EntityMobEnderman>, world: World) : Ent
 	override fun livingTick() {
 		super.livingTick()
 		
-		if (!world.isRemote) {
-			teleportHandler.update()
-			waterHandler.update()
+		components.tick(this)
 		
+		if (!world.isRemote) {
 			if (heldBlockTimer > 0 && --heldBlockTimer == 0.toShort()) {
 				if (heldBlockDespawns || !blockHandler.tryPlaceBlock(allowPlayerProximity = false)) {
 					teleportHandler.teleportOutOfWorld(force = rand.nextBoolean())
@@ -536,8 +544,7 @@ class EntityMobEnderman(type: EntityType<EntityMobEnderman>, world: World) : Ent
 	override fun writeAdditional(nbt: TagCompound) = nbt.heeTag.use {
 		super.writeAdditional(nbt)
 		
-		put(TELEPORT_HANDLER_TAG, teleportHandler.serializeNBT())
-		put(WATER_HANDLER_TAG, waterHandler.serializeNBT())
+		components.serializeTo(this)
 		
 		putBoolean(CAN_PICK_UP_BLOCKS_TAG, aiPickUpBlocks.enabled)
 		putShort(HELD_BLOCK_TIMER_TAG, heldBlockTimer)
@@ -547,8 +554,7 @@ class EntityMobEnderman(type: EntityType<EntityMobEnderman>, world: World) : Ent
 	override fun readAdditional(nbt: TagCompound) = nbt.heeTag.use {
 		super.readAdditional(nbt)
 		
-		teleportHandler.deserializeNBT(getCompound(TELEPORT_HANDLER_TAG))
-		waterHandler.deserializeNBT(getCompound(WATER_HANDLER_TAG))
+		components.deserializeFrom(this)
 		
 		aiPickUpBlocks.enabled = getBoolean(CAN_PICK_UP_BLOCKS_TAG)
 		heldBlockTimer = getShort(HELD_BLOCK_TIMER_TAG)

src/main/java/chylex/hee/game/entity/living/behavior/EndermanTeleportHandler.kt

@@ -29,6 +29,8 @@ import chylex.hee.network.client.PacketClientFX
 import chylex.hee.network.fx.FxEntityData
 import chylex.hee.network.fx.FxEntityHandler
 import chylex.hee.system.color.IntColor.Companion.RGB
+import chylex.hee.system.component.general.SerializableComponent
+import chylex.hee.system.component.general.TickableComponent
 import chylex.hee.system.math.Vec
 import chylex.hee.system.math.Vec3
 import chylex.hee.system.math.addY
@@ -53,13 +55,12 @@ import net.minecraft.util.SoundCategory
 import net.minecraft.util.math.AxisAlignedBB
 import net.minecraft.util.math.BlockPos
 import net.minecraft.util.math.Vec3d
-import net.minecraftforge.common.util.INBTSerializable
 import java.util.Random
 import java.util.UUID
 import kotlin.math.min
 import kotlin.math.sqrt
 
-class EndermanTeleportHandler(private val enderman: EntityMobAbstractEnderman) : INBTSerializable<TagCompound> {
+class EndermanTeleportHandler(private val enderman: EntityMobAbstractEnderman) : TickableComponent, SerializableComponent {
 	companion object {
 		private const val DEFAULT_RESTORE_Y = -256.0
 		
@@ -117,6 +118,9 @@ class EndermanTeleportHandler(private val enderman: EntityMobAbstractEnderman) :
 		}
 	}
 	
+	override val serializationKey
+		get() = "Teleport"
+	
 	val preventDespawn
 		get() = tpDelayTicks > 0
 	
@@ -133,7 +137,7 @@ class EndermanTeleportHandler(private val enderman: EntityMobAbstractEnderman) :
 	
 	private var lastDodged: UUID? = null
 	
-	fun update() {
+	override fun tickServer() {
 		if (tpCooldown > 0) {
 			--tpCooldown
 		}

src/main/java/chylex/hee/game/entity/living/behavior/EndermanWaterHandler.kt

@@ -4,15 +4,16 @@ import chylex.hee.game.entity.OPERATION_MUL_INCR_INDIVIDUAL
 import chylex.hee.game.entity.living.EntityMobAbstractEnderman
 import chylex.hee.game.entity.tryApplyModifier
 import chylex.hee.game.entity.tryRemoveModifier
+import chylex.hee.system.component.general.SerializableComponent
+import chylex.hee.system.component.general.TickableComponent
 import chylex.hee.system.random.nextInt
 import chylex.hee.system.serialization.TagCompound
 import chylex.hee.system.serialization.use
 import net.minecraft.entity.SharedMonsterAttributes.ATTACK_DAMAGE
 import net.minecraft.entity.ai.attributes.AttributeModifier
 import net.minecraft.util.DamageSource
-import net.minecraftforge.common.util.INBTSerializable
 
-class EndermanWaterHandler(private val enderman: EntityMobAbstractEnderman, private val takeDamageAfterWetTicks: Int) : INBTSerializable<TagCompound> {
+class EndermanWaterHandler(private val enderman: EntityMobAbstractEnderman, private val takeDamageAfterWetTicks: Int) : TickableComponent, SerializableComponent {
 	private companion object {
 		private val DEBUFF_WEAKNESS = AttributeModifier("Water weakness", -0.5, OPERATION_MUL_INCR_INDIVIDUAL)
 		
@@ -20,10 +21,13 @@ class EndermanWaterHandler(private val enderman: EntityMobAbstractEnderman, priv
 		private const val DEBUFF_TICKS_TAG = "DebuffTicks"
 	}
 	
+	override val serializationKey
+		get() = "Water"
+	
 	private var wetCounter = 0
 	private var debuffTicks = 0
 	
-	fun update() {
+	override fun tickServer() {
 		val isWet = enderman.isWet
 		
 		if (isWet) {

src/main/java/chylex/hee/game/item/ItemAbstractEnergyUser.kt

@@ -3,6 +3,7 @@ package chylex.hee.game.item
 import chylex.hee.game.block.entity.TileEntityEnergyCluster
 import chylex.hee.game.inventory.heeTag
 import chylex.hee.game.inventory.heeTagOrNull
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.mechanics.energy.IEnergyQuantity
 import chylex.hee.game.mechanics.energy.IEnergyQuantity.Units
 import chylex.hee.game.particle.ParticleEnergyTransferToPlayer
@@ -36,11 +37,11 @@ import chylex.hee.system.serialization.use
 import chylex.hee.system.serialization.writePos
 import net.minecraft.client.util.ITooltipFlag
 import net.minecraft.entity.Entity
-import net.minecraft.item.Item
 import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
 import net.minecraft.network.PacketBuffer
 import net.minecraft.util.ActionResultType
+import net.minecraft.util.math.BlockPos
 import net.minecraft.util.math.MathHelper
 import net.minecraft.util.text.ITextComponent
 import net.minecraft.util.text.TranslationTextComponent
@@ -50,7 +51,7 @@ import java.util.Random
 import kotlin.math.max
 import kotlin.math.pow
 
-abstract class ItemAbstractEnergyUser(properties: Properties) : Item(properties) {
+abstract class ItemAbstractEnergyUser(properties: Properties) : ItemWithComponents(properties), UseOnBlockComponent {
 	companion object {
 		private const val ENERGY_LEVEL_TAG = "EnergyLevel"
 		
@@ -100,6 +101,8 @@ abstract class ItemAbstractEnergyUser(properties: Properties) : Item(properties)
 	init {
 		@Suppress("DEPRECATION")
 		require(maxStackSize == 1) { "energy item must have a maximum stack size of 1" }
+		
+		components.attach(this)
 	}
 	
 	protected abstract fun getEnergyCapacity(stack: ItemStack): Units
@@ -163,15 +166,11 @@ abstract class ItemAbstractEnergyUser(properties: Properties) : Item(properties)
 	
 	// Energy charging
 	
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
-		
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType? {
 		val tile = pos.getTile<TileEntityEnergyCluster>(world)
-		val stack = player.getHeldItem(context.hand)
+		val stack = player.getHeldItem(ctx.hand)
 		
-		if (tile == null || !player.canPlayerEdit(pos, context.face, stack)) {
+		if (tile == null || !player.canPlayerEdit(pos, ctx.face, stack)) {
 			return FAIL
 		}
 		else if (world.isRemote) {

src/main/java/chylex/hee/game/item/ItemAbstractInfusable.kt

@@ -13,7 +13,7 @@ import net.minecraft.util.text.StringTextComponent
 import net.minecraft.util.text.TranslationTextComponent
 import net.minecraft.world.World
 
-abstract class ItemAbstractInfusable(properties: Properties) : Item(properties), IInfusableItem {
+abstract class ItemAbstractInfusable(properties: Properties) : ItemWithComponents(properties), IInfusableItem {
 	companion object {
 		fun onCanApplyInfusion(item: Item, infusion: Infusion): Boolean {
 			return infusion.targetItems.contains(item)

src/main/java/chylex/hee/game/item/ItemCompost.kt

@@ -1,6 +1,7 @@
 package chylex.hee.game.item
 
 import chylex.hee.game.inventory.size
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.world.BlockEditor
 import chylex.hee.init.ModItems
 import chylex.hee.network.client.PacketClientFX
@@ -15,7 +16,6 @@ import chylex.hee.system.migration.ItemBoneMeal
 import net.minecraft.block.DispenserBlock.FACING
 import net.minecraft.dispenser.IBlockSource
 import net.minecraft.dispenser.OptionalDispenseBehavior
-import net.minecraft.item.Item
 import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
 import net.minecraft.util.ActionResultType
@@ -25,7 +25,7 @@ import net.minecraft.world.server.ServerWorld
 import net.minecraftforge.common.util.FakePlayerFactory
 import java.util.Random
 
-class ItemCompost(properties: Properties) : Item(properties) {
+class ItemCompost(properties: Properties) : ItemWithComponents(properties) {
 	companion object {
 		private const val BONE_MEAL_EQUIVALENT = 2
 		
@@ -61,6 +61,24 @@ class ItemCompost(properties: Properties) : Item(properties) {
 	}
 	
 	init {
+		components.attach(object : UseOnBlockComponent {
+			override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType {
+				if (!BlockEditor.canEdit(pos, player, item)) {
+					return FAIL
+				}
+				else if (world.isRemote) {
+					return SUCCESS
+				}
+				
+				if (applyCompost(world, pos, player)) {
+					item.shrink(1)
+					return SUCCESS
+				}
+				
+				return PASS
+			}
+		})
+		
 		BlockDispenser.registerDispenseBehavior(this, object : OptionalDispenseBehavior() {
 			override fun dispenseStack(source: IBlockSource, stack: ItemStack): ItemStack {
 				val world = source.world
@@ -77,26 +95,4 @@ class ItemCompost(properties: Properties) : Item(properties) {
 			}
 		})
 	}
-	
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
-		
-		val heldItem = player.getHeldItem(context.hand)
-		
-		if (!BlockEditor.canEdit(pos, player, heldItem)) {
-			return FAIL
-		}
-		else if (world.isRemote) {
-			return SUCCESS
-		}
-		
-		if (applyCompost(world, pos, player)) {
-			heldItem.shrink(1)
-			return SUCCESS
-		}
-		
-		return PASS
-	}
 }

src/main/java/chylex/hee/game/item/ItemEndPowder.kt

@@ -2,27 +2,27 @@ package chylex.hee.game.item
 
 import chylex.hee.game.block.IBlockDeathFlowerDecaying
 import chylex.hee.game.entity.item.EntityItemCauldronTrigger
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.world.BlockEditor
 import chylex.hee.game.world.getBlock
 import chylex.hee.system.migration.ActionResult.FAIL
 import chylex.hee.system.migration.ActionResult.PASS
 import chylex.hee.system.migration.ActionResult.SUCCESS
+import chylex.hee.system.migration.EntityPlayer
 import net.minecraft.entity.Entity
-import net.minecraft.item.Item
 import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
 import net.minecraft.util.ActionResultType
+import net.minecraft.util.math.BlockPos
 import net.minecraft.world.World
 
-class ItemEndPowder(properties: Properties) : Item(properties) {
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
+class ItemEndPowder(properties: Properties) : ItemWithComponents(properties), UseOnBlockComponent {
+	init {
+		components.attach(this)
+	}
 	
-		val heldItem = player.getHeldItem(context.hand)
-		
-		if (!BlockEditor.canEdit(pos, player, heldItem)) {
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType? {
+		if (!BlockEditor.canEdit(pos, player, item)) {
 			return FAIL
 		}
 		
@@ -33,7 +33,7 @@ class ItemEndPowder(properties: Properties) : Item(properties) {
 				block.healDeathFlower(world, pos)
 			}
 			
-			heldItem.shrink(1)
+			item.shrink(1)
 			return SUCCESS
 		}
 		

src/main/java/chylex/hee/game/item/ItemEnergyOracle.kt

@@ -28,7 +28,6 @@ import chylex.hee.system.math.angleBetween
 import chylex.hee.system.math.floorToInt
 import chylex.hee.system.math.over
 import chylex.hee.system.math.toDegrees
-import chylex.hee.system.migration.ActionResult.FAIL
 import chylex.hee.system.migration.ActionResult.SUCCESS
 import chylex.hee.system.migration.EntityLivingBase
 import chylex.hee.system.migration.EntityPlayer
@@ -150,17 +149,13 @@ class ItemEnergyOracle(properties: Properties) : ItemAbstractEnergyUser(properti
 		return ItemAbstractInfusable.onCanApplyInfusion(this, infusion)
 	}
 	
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
-		
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType? {
 		if (player.isSneaking && pos.getTile<TileEntityEnergyCluster>(world) != null) {
 			if (world.isRemote) {
 				return SUCCESS
 			}
 			
-			val heldItem = player.getHeldItem(context.hand)
+			val heldItem = player.getHeldItem(ctx.hand)
 			val entry = pos.toLong()
 			
 			with(heldItem.heeTag) {
@@ -176,7 +171,7 @@ class ItemEnergyOracle(properties: Properties) : ItemAbstractEnergyUser(properti
 			return SUCCESS
 		}
 		
-		return super.onItemUse(context)
+		return super.useOnBlock(world, pos, player, item, ctx)
 	}
 	
 	override fun inventoryTick(stack: ItemStack, world: World, entity: Entity, itemSlot: Int, isSelected: Boolean) {

src/main/java/chylex/hee/game/item/ItemEnergyReceptacle.kt

@@ -4,6 +4,7 @@ import chylex.hee.client.color.NO_TINT
 import chylex.hee.game.block.entity.TileEntityEnergyCluster
 import chylex.hee.game.inventory.heeTag
 import chylex.hee.game.inventory.heeTagOrNull
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.item.infusion.Infusion.SAFETY
 import chylex.hee.game.item.infusion.Infusion.STABILITY
 import chylex.hee.game.item.infusion.InfusionList
@@ -27,10 +28,10 @@ import chylex.hee.system.forge.Side
 import chylex.hee.system.forge.Sided
 import chylex.hee.system.migration.ActionResult.FAIL
 import chylex.hee.system.migration.ActionResult.SUCCESS
+import chylex.hee.system.migration.EntityPlayer
 import chylex.hee.system.serialization.TagCompound
 import chylex.hee.system.serialization.getIntegerOrNull
 import chylex.hee.system.serialization.hasKey
-import chylex.hee.system.serialization.use
 import net.minecraft.client.renderer.color.IItemColor
 import net.minecraft.client.util.ITooltipFlag
 import net.minecraft.entity.Entity
@@ -43,7 +44,7 @@ import net.minecraft.util.text.TranslationTextComponent
 import net.minecraft.world.World
 import kotlin.math.pow
 
-class ItemEnergyReceptacle(properties: Properties) : ItemAbstractInfusable(properties) {
+class ItemEnergyReceptacle(properties: Properties) : ItemAbstractInfusable(properties), UseOnBlockComponent {
 	private companion object {
 		private const val CLUSTER_SNAPSHOT_TAG = "Cluster"
 		private const val UPDATE_TIME_TAG = "UpdateTime"
@@ -105,18 +106,14 @@ class ItemEnergyReceptacle(properties: Properties) : ItemAbstractInfusable(prope
 		}
 		
 		// POLISH tweak animation
+		
+		components.attach(this)
 	}
 	
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
-		
-		val stack = player.getHeldItem(context.hand)
-		
-		stack.heeTag.use {
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType? {
+		with(item.heeTag) {
 			if (hasKey(CLUSTER_SNAPSHOT_TAG)) {
-				val finalPos = BlockEditor.place(ModBlocks.ENERGY_CLUSTER, player, stack, context)
+				val finalPos = BlockEditor.place(ModBlocks.ENERGY_CLUSTER, player, item, ctx)
 				
 				if (world.isRemote) {
 					return SUCCESS
@@ -126,7 +123,7 @@ class ItemEnergyReceptacle(properties: Properties) : ItemAbstractInfusable(prope
 					finalPos.getTile<TileEntityEnergyCluster>(world)?.let {
 						it.loadClusterSnapshot(ClusterSnapshot(getCompound(CLUSTER_SNAPSHOT_TAG)), inactive = false)
 						
-						if (shouldLoseHealth(it, this, InfusionTag.getList(stack))) {
+						if (shouldLoseHealth(it, this, InfusionTag.getList(item))) {
 							it.deteriorateHealth()
 						}
 					}
@@ -141,7 +138,7 @@ class ItemEnergyReceptacle(properties: Properties) : ItemAbstractInfusable(prope
 					return SUCCESS
 				}
 			}
-			else if (BlockEditor.canEdit(pos, player, stack)) {
+			else if (BlockEditor.canEdit(pos, player, item)) {
 				if (world.isRemote) {
 					return SUCCESS
 				}

src/main/java/chylex/hee/game/item/ItemFlintAndInfernium.kt

@@ -6,6 +6,7 @@ import chylex.hee.game.entity.heeTag
 import chylex.hee.game.entity.heeTagOrNull
 import chylex.hee.game.entity.posVec
 import chylex.hee.game.inventory.doDamage
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.world.BlockEditor
 import chylex.hee.game.world.FLAG_NONE
 import chylex.hee.game.world.getBlock
@@ -14,7 +15,6 @@ import chylex.hee.game.world.playServer
 import chylex.hee.game.world.removeBlock
 import chylex.hee.game.world.setBlock
 import chylex.hee.init.ModBlocks
-import chylex.hee.system.compatibility.MinecraftForgeEventBus
 import chylex.hee.system.forge.EventPriority
 import chylex.hee.system.forge.SubscribeAllEvents
 import chylex.hee.system.forge.SubscribeEvent
@@ -26,7 +26,6 @@ import chylex.hee.system.migration.EntityPlayer
 import chylex.hee.system.migration.Sounds
 import chylex.hee.system.random.nextFloat
 import net.minecraft.block.Blocks
-import net.minecraft.item.Item
 import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
 import net.minecraft.util.ActionResultType
@@ -36,7 +35,7 @@ import net.minecraft.util.math.BlockPos
 import net.minecraft.world.World
 import net.minecraftforge.event.world.ExplosionEvent
 
-class ItemFlintAndInfernium(properties: Properties) : Item(properties) {
+class ItemFlintAndInfernium(properties: Properties) : ItemWithComponents(properties), UseOnBlockComponent {
 	@SubscribeAllEvents(modid = HEE.ID)
 	companion object {
 		private const val CREEPER_INFERNIUM_TAG = "Infernium"
@@ -55,7 +54,7 @@ class ItemFlintAndInfernium(properties: Properties) : Item(properties) {
 	}
 	
 	init {
-		MinecraftForgeEventBus.register(this)
+		components.attach(this)
 	}
 	
 	fun igniteTNT(world: World, pos: BlockPos, player: EntityPlayer?, ignoreTrap: Boolean) {
@@ -67,14 +66,8 @@ class ItemFlintAndInfernium(properties: Properties) : Item(properties) {
 		pos.removeBlock(world)
 	}
 	
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
-		
-		val heldItem = player.getHeldItem(context.hand)
-		
-		if (!BlockEditor.canEdit(pos, player, heldItem)) {
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType? {
+		if (!BlockEditor.canEdit(pos, player, item)) {
 			return FAIL
 		}
 		
@@ -85,11 +78,11 @@ class ItemFlintAndInfernium(properties: Properties) : Item(properties) {
 				igniteTNT(world, pos, player, ignoreTrap = false)
 			}
 			else {
-				BlockEditor.place(ModBlocks.ETERNAL_FIRE, player, heldItem, context) ?: return FAIL
+				BlockEditor.place(ModBlocks.ETERNAL_FIRE, player, item, ctx) ?: return FAIL
 			}
 			
 			Sounds.ITEM_FLINTANDSTEEL_USE.playServer(world, pos, SoundCategory.BLOCKS, volume = 1.1F, pitch = world.rand.nextFloat(0.4F, 0.5F))
-			heldItem.doDamage(1, player, context.hand)
+			item.doDamage(1, player, ctx.hand)
 		}
 		
 		return SUCCESS

src/main/java/chylex/hee/game/item/ItemPortalToken.kt

@@ -9,6 +9,7 @@ import chylex.hee.game.entity.item.EntityTokenHolder
 import chylex.hee.game.entity.selectExistingEntities
 import chylex.hee.game.inventory.heeTag
 import chylex.hee.game.inventory.heeTagOrNull
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.mechanics.portal.DimensionTeleporter
 import chylex.hee.game.mechanics.portal.EntityPortalContact
 import chylex.hee.game.world.BlockEditor
@@ -34,7 +35,6 @@ import chylex.hee.system.serialization.putEnum
 import net.minecraft.client.renderer.color.IItemColor
 import net.minecraft.client.util.ITooltipFlag
 import net.minecraft.entity.Entity
-import net.minecraft.item.Item
 import net.minecraft.item.ItemGroup
 import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
@@ -43,13 +43,14 @@ import net.minecraft.util.ActionResultType
 import net.minecraft.util.Hand
 import net.minecraft.util.NonNullList
 import net.minecraft.util.math.AxisAlignedBB
+import net.minecraft.util.math.BlockPos
 import net.minecraft.util.text.ITextComponent
 import net.minecraft.util.text.StringTextComponent
 import net.minecraft.util.text.TranslationTextComponent
 import net.minecraft.world.World
 import net.minecraft.world.dimension.DimensionType
 
-class ItemPortalToken(properties: Properties) : Item(properties) {
+class ItemPortalToken(properties: Properties) : ItemWithComponents(properties), UseOnBlockComponent {
 	companion object {
 		private const val TYPE_TAG = "Type"
 		private const val TERRITORY_TYPE_TAG = "Territory"
@@ -72,6 +73,8 @@ class ItemPortalToken(properties: Properties) : Item(properties) {
 	}
 	
 	init {
+		components.attach(this)
+		
 		addPropertyOverride(Resource.Custom("token_type")) { stack, _, _ ->
 			getTokenType(stack).propertyValue + (if (stack.heeTagOrNull.hasKey(IS_CORRUPTED_TAG)) 0.5F else 0F)
 		}
@@ -178,10 +181,7 @@ class ItemPortalToken(properties: Properties) : Item(properties) {
 		return ActionResult(SUCCESS, heldItem)
 	}
 	
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType {
 		if (!player.isCreative || player.isSneaking) {
 			return PASS
 		}
@@ -190,16 +190,14 @@ class ItemPortalToken(properties: Properties) : Item(properties) {
 			return SUCCESS
 		}
 		
-		val targetPos = context.pos.up()
+		val targetPos = pos.up()
+		val territoryType = getTerritoryType(item)
 		
-		val heldItem = player.getHeldItem(context.hand)
-		val territoryType = getTerritoryType(heldItem)
-		
-		if (territoryType == null || context.face != UP || !BlockEditor.canEdit(targetPos, player, heldItem) || world.selectExistingEntities.inBox<EntityTokenHolder>(AxisAlignedBB(targetPos)).any()) {
+		if (territoryType == null || ctx.face != UP || !BlockEditor.canEdit(targetPos, player, item) || world.selectExistingEntities.inBox<EntityTokenHolder>(AxisAlignedBB(targetPos)).any()) {
 			return FAIL
 		}
 		
-		world.addEntity(EntityTokenHolder(world, targetPos, getTokenType(heldItem), territoryType))
+		world.addEntity(EntityTokenHolder(world, targetPos, getTokenType(item), territoryType))
 		return SUCCESS
 	}
 	

src/main/java/chylex/hee/game/item/ItemPuzzleMedallion.kt

@@ -1,6 +1,7 @@
 package chylex.hee.game.item
 
 import chylex.hee.game.block.entity.TileEntityMinersBurialAltar
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.world.BlockEditor
 import chylex.hee.game.world.getTile
 import chylex.hee.game.world.playUniversal
@@ -8,20 +9,19 @@ import chylex.hee.init.ModSounds
 import chylex.hee.system.migration.ActionResult.FAIL
 import chylex.hee.system.migration.ActionResult.PASS
 import chylex.hee.system.migration.ActionResult.SUCCESS
-import net.minecraft.item.Item
+import chylex.hee.system.migration.EntityPlayer
+import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
 import net.minecraft.util.ActionResultType
 import net.minecraft.util.SoundCategory
+import net.minecraft.util.math.BlockPos
+import net.minecraft.world.World
 
-class ItemPuzzleMedallion(properties: Properties) : Item(properties) {
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
-		
-		val heldItem = player.getHeldItem(context.hand)
-		
-		if (!BlockEditor.canEdit(pos, player, heldItem)) {
+class ItemPuzzleMedallion(properties: Properties) : ItemWithComponents(properties) {
+	init {
+		components.attach(object : UseOnBlockComponent {
+			override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType {
+				if (!BlockEditor.canEdit(pos, player, item)) {
 					return FAIL
 				}
 				
@@ -29,7 +29,7 @@ class ItemPuzzleMedallion(properties: Properties) : Item(properties) {
 				
 				if (tile != null && !tile.hasMedallion) {
 					tile.hasMedallion = true
-			heldItem.shrink(1)
+					item.shrink(1)
 					
 					ModSounds.ITEM_PUZZLE_MEDALLION_INSERT.playUniversal(player, pos, SoundCategory.BLOCKS, volume = 2F, pitch = 0.8F)
 					return SUCCESS
@@ -37,4 +37,6 @@ class ItemPuzzleMedallion(properties: Properties) : Item(properties) {
 				
 				return PASS
 			}
+		})
+	}
 }

src/main/java/chylex/hee/game/item/ItemRevitalizationSubstance.kt

@@ -3,6 +3,7 @@ package chylex.hee.game.item
 import chylex.hee.client.model.ModelHelper
 import chylex.hee.game.block.entity.TileEntityEnergyCluster
 import chylex.hee.game.entity.item.EntityItemRevitalizationSubstance
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.mechanics.energy.IClusterHealth.HealthOverride.REVITALIZING
 import chylex.hee.game.particle.ParticleSmokeCustom
 import chylex.hee.game.particle.spawner.ParticleSpawnerCustom
@@ -26,7 +27,6 @@ import chylex.hee.system.serialization.readPos
 import chylex.hee.system.serialization.use
 import chylex.hee.system.serialization.writePos
 import net.minecraft.entity.Entity
-import net.minecraft.item.Item
 import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
 import net.minecraft.network.PacketBuffer
@@ -37,7 +37,7 @@ import net.minecraft.util.math.BlockPos
 import net.minecraft.world.World
 import java.util.Random
 
-class ItemRevitalizationSubstance(properties: Properties) : Item(properties) {
+class ItemRevitalizationSubstance(properties: Properties) : ItemWithComponents(properties), UseOnBlockComponent {
 	companion object {
 		private val PARTICLE_FAIL = ParticleSpawnerCustom(
 			type = ParticleSmokeCustom,
@@ -70,11 +70,11 @@ class ItemRevitalizationSubstance(properties: Properties) : Item(properties) {
 		}
 	}
 	
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
+	init {
+		components.attach(this)
+	}
 	
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType? {
 		if (world.isRemote) {
 			return FAIL // disable animation
 		}
@@ -83,11 +83,11 @@ class ItemRevitalizationSubstance(properties: Properties) : Item(properties) {
 		
 		if (cluster.currentHealth != REVITALIZING) {
 			if (cluster.addRevitalizationSubstance()) {
-				player.getHeldItem(context.hand).shrink(1)
+				player.getHeldItem(ctx.hand).shrink(1)
 				ModSounds.ITEM_REVITALIZATION_SUBSTANCE_USE_SUCCESS.playServer(world, pos, SoundCategory.BLOCKS, volume = 0.5F)
 			}
 			else {
-				PacketClientFX(FX_FAIL, FxUseData(pos, player, context.hand)).sendToAllAround(player, 24.0)
+				PacketClientFX(FX_FAIL, FxUseData(pos, player, ctx.hand)).sendToAllAround(player, 24.0)
 			}
 		}
 		

src/main/java/chylex/hee/game/item/ItemTableCore.kt

@@ -2,33 +2,33 @@ package chylex.hee.game.item
 
 import chylex.hee.game.block.BlockAbstractTableTile
 import chylex.hee.game.block.BlockTableBase
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.world.BlockEditor
 import chylex.hee.game.world.breakBlock
 import chylex.hee.game.world.getBlock
 import chylex.hee.game.world.setBlock
 import chylex.hee.system.forge.Side
 import chylex.hee.system.forge.Sided
+import chylex.hee.system.migration.EntityPlayer
 import net.minecraft.client.util.ITooltipFlag
-import net.minecraft.item.Item
 import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
 import net.minecraft.util.ActionResultType
 import net.minecraft.util.ActionResultType.FAIL
 import net.minecraft.util.ActionResultType.PASS
 import net.minecraft.util.ActionResultType.SUCCESS
+import net.minecraft.util.math.BlockPos
 import net.minecraft.util.text.ITextComponent
 import net.minecraft.util.text.TranslationTextComponent
 import net.minecraft.world.World
 
-class ItemTableCore(private val tableBlocks: Array<BlockAbstractTableTile<*>>, properties: Properties) : Item(properties) {
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
+class ItemTableCore(private val tableBlocks: Array<BlockAbstractTableTile<*>>, properties: Properties) : ItemWithComponents(properties), UseOnBlockComponent {
+	init {
+		components.attach(this)
+	}
 	
-		val heldItem = player.getHeldItem(context.hand)
-		
-		if (!BlockEditor.canEdit(pos, player, heldItem)) {
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType {
+		if (!BlockEditor.canEdit(pos, player, item)) {
 			return FAIL
 		}
 		
@@ -42,7 +42,7 @@ class ItemTableCore(private val tableBlocks: Array<BlockAbstractTableTile<*>>, p
 				pos.setBlock(world, table)
 			}
 			
-			heldItem.shrink(1)
+			item.shrink(1)
 			return SUCCESS
 		}
 		

src/main/java/chylex/hee/game/item/ItemTableLink.kt

@@ -12,6 +12,7 @@ import chylex.hee.game.item.ItemTableLink.Companion.SoundType.LINK_FAIL
 import chylex.hee.game.item.ItemTableLink.Companion.SoundType.LINK_OUTPUT
 import chylex.hee.game.item.ItemTableLink.Companion.SoundType.LINK_RESTART
 import chylex.hee.game.item.ItemTableLink.Companion.SoundType.LINK_SUCCESS
+import chylex.hee.game.item.components.UseOnBlockComponent
 import chylex.hee.game.world.getBlock
 import chylex.hee.game.world.getTile
 import chylex.hee.game.world.playClient
@@ -26,6 +27,7 @@ import chylex.hee.system.forge.Sided
 import chylex.hee.system.migration.ActionResult.FAIL
 import chylex.hee.system.migration.ActionResult.SUCCESS
 import chylex.hee.system.migration.EntityItem
+import chylex.hee.system.migration.EntityPlayer
 import chylex.hee.system.random.nextFloat
 import chylex.hee.system.serialization.getPos
 import chylex.hee.system.serialization.hasKey
@@ -34,7 +36,6 @@ import chylex.hee.system.serialization.readPos
 import chylex.hee.system.serialization.use
 import chylex.hee.system.serialization.writePos
 import net.minecraft.entity.Entity
-import net.minecraft.item.Item
 import net.minecraft.item.ItemStack
 import net.minecraft.item.ItemUseContext
 import net.minecraft.network.PacketBuffer
@@ -44,7 +45,7 @@ import net.minecraft.util.math.BlockPos
 import net.minecraft.world.World
 import java.util.Random
 
-class ItemTableLink(properties: Properties) : Item(properties) {
+class ItemTableLink(properties: Properties) : ItemWithComponents(properties), UseOnBlockComponent {
 	companion object {
 		private const val POS_TAG = "StoredPos"
 		private const val TIME_TAG = "StoredTime"
@@ -106,11 +107,11 @@ class ItemTableLink(properties: Properties) : Item(properties) {
 		}
 	}
 	
-	override fun onItemUse(context: ItemUseContext): ActionResultType {
-		val player = context.player ?: return FAIL
-		val world = context.world
-		val pos = context.pos
+	init {
+		components.attach(this)
+	}
 	
+	override fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType? {
 		if (!player.isSneaking || !isValidTarget(world, pos)) {
 			val pedestal = pos.getTile<TileEntityTablePedestal>(world)
 			
@@ -131,7 +132,7 @@ class ItemTableLink(properties: Properties) : Item(properties) {
 			return SUCCESS
 		}
 		
-		val heldItem = player.getHeldItem(context.hand)
+		val heldItem = player.getHeldItem(ctx.hand)
 		var newStoredPos = pos
 		var soundType = LINK_RESTART
 		

src/system/src/main/java/chylex/hee/game/item/ItemWithComponents.kt

@@ -0,0 +1,18 @@
+package chylex.hee.game.item
+
+import chylex.hee.game.item.components.UseOnBlockComponent
+import chylex.hee.system.component.EntityComponents
+import net.minecraft.item.Item
+import net.minecraft.item.ItemUseContext
+import net.minecraft.util.ActionResultType
+import net.minecraft.util.ActionResultType.FAIL
+import net.minecraft.util.ActionResultType.PASS
+
+open class ItemWithComponents(properties: Properties) : Item(properties) {
+	val components = EntityComponents()
+	
+	final override fun onItemUse(context: ItemUseContext): ActionResultType {
+		val player = context.player ?: return FAIL
+		return components.handle<UseOnBlockComponent, ActionResultType> { useOnBlock(context.world, context.pos, player, context.item, context) } ?: PASS
+	}
+}

src/system/src/main/java/chylex/hee/game/item/components/UseOnBlockComponent.kt

@@ -0,0 +1,12 @@
+package chylex.hee.game.item.components
+
+import chylex.hee.system.migration.EntityPlayer
+import net.minecraft.item.ItemStack
+import net.minecraft.item.ItemUseContext
+import net.minecraft.util.ActionResultType
+import net.minecraft.util.math.BlockPos
+import net.minecraft.world.World
+
+interface UseOnBlockComponent { // TODO use as objects instead of inheriting the interface on Item
+	fun useOnBlock(world: World, pos: BlockPos, player: EntityPlayer, item: ItemStack, ctx: ItemUseContext): ActionResultType?
+}

src/system/src/main/java/chylex/hee/system/component/AbstractAwareComponent.kt

@@ -0,0 +1,8 @@
+package chylex.hee.system.component
+
+abstract class AbstractAwareComponent {
+	var entityComponents: EntityComponents? = null
+	
+	open fun onComponentAttached() {}
+	open fun onComponentDetached() {}
+}

src/system/src/main/java/chylex/hee/system/component/EntityComponents.kt

@@ -0,0 +1,56 @@
+package chylex.hee.system.component
+
+class EntityComponents {
+	private val mutableComponents = mutableListOf<Any>()
+	
+	val components: List<Any>
+		get() = mutableComponents
+	
+	fun attach(component: Any) {
+		require(!mutableComponents.contains(component)) { "[EntityComponents] component must not be registered twice" }
+		mutableComponents.add(component)
+		
+		if (component is AbstractAwareComponent) {
+			require(component.entityComponents === null) { "[EntityComponents] component must not be registered in two entities" }
+			component.entityComponents = this
+			component.onComponentAttached()
+		}
+	}
+	
+	fun detach(component: Any) {
+		if (!mutableComponents.remove(component)) {
+			return
+		}
+		
+		if (component is AbstractAwareComponent) {
+			require(component.entityComponents === this) { "[EntityComponents] component was not registered correctly" }
+			component.onComponentDetached()
+			component.entityComponents = null
+		}
+	}
+	
+	inline fun <reified T> on(f: T.() -> Unit) {
+		for(component in components) {
+			if (component is T) {
+				f(component)
+			}
+		}
+	}
+	
+	inline fun <reified T, U> handle(f: T.() -> U?): U? {
+		for(component in components) {
+			if (component is T) {
+				val result = f(component)
+				if (result != null) {
+					return result
+				}
+			}
+		}
+		
+		return null
+	}
+	
+	inline fun <reified T> list(): List<T> {
+		return components.filterIsInstance<T>()
+	}
+}

src/system/src/main/java/chylex/hee/system/component/general/SerializableComponent.kt

@@ -0,0 +1,20 @@
+package chylex.hee.system.component.general
+
+import chylex.hee.system.component.EntityComponents
+import chylex.hee.system.serialization.TagCompound
+import net.minecraftforge.common.util.INBTSerializable
+
+interface SerializableComponent : INBTSerializable<TagCompound> {
+	val serializationKey: String
+}
+
+fun EntityComponents.serializeTo(tag: TagCompound) {
+	this.on<SerializableComponent> {
+		require(!tag.contains(serializationKey)) { "[SerializableComponent] cannot serialize duplicate key: $serializationKey" }
+		tag.put(serializationKey, serializeNBT())
+	}
+}
+
+fun EntityComponents.deserializeFrom(tag: TagCompound) {
+	this.on<SerializableComponent> { deserializeNBT(tag.getCompound(serializationKey)) }
+}

src/system/src/main/java/chylex/hee/system/component/general/TickableComponent.kt

@@ -0,0 +1,19 @@
+package chylex.hee.system.component.general
+
+import chylex.hee.system.component.EntityComponents
+import net.minecraft.entity.Entity
+
+interface TickableComponent {
+	@JvmDefault fun tickClient() {}
+	@JvmDefault fun tickServer() {}
+}
+
+@JvmName("tickEntity")
+fun <T : Entity> EntityComponents.tick(entity: T) {
+	if (entity.world.isRemote) {
+		this.on(TickableComponent::tickClient)
+	}
+	else {
+		this.on(TickableComponent::tickServer)
+	}
+}