feat: Implement Vein Miner component with configurable multi-block breaking, compatible material groups, tool categories, and visual highlighting.

src/main/kotlin/net/hareworks/hcu/items/App.kt

@@ -11,6 +11,7 @@ import net.hareworks.hcu.items.content.items.GrapplingItem
 import net.hareworks.hcu.items.content.components.GliderComponent
 import net.hareworks.hcu.items.content.components.DoubleJumpComponent
 import net.hareworks.hcu.items.content.components.BlinkComponent
+import net.hareworks.hcu.items.content.components.VeinMinerComponent
 
 import org.bukkit.permissions.PermissionDefault
 import org.bukkit.plugin.java.JavaPlugin
@@ -43,6 +44,7 @@ public class App : JavaPlugin() {
 		ComponentRegistry.register(GliderComponent(this))
 		ComponentRegistry.register(DoubleJumpComponent(this))
 		ComponentRegistry.register(BlinkComponent(this))
+		ComponentRegistry.register(VeinMinerComponent(this))
 
 	}
 }

src/main/kotlin/net/hareworks/hcu/items/api/component/CustomComponent.kt

@@ -28,4 +28,5 @@ interface CustomComponent {
     fun onPlayerMove(event: org.bukkit.event.player.PlayerMoveEvent) {}
     fun onToggleSneak(player: org.bukkit.entity.Player, item: org.bukkit.inventory.ItemStack, event: org.bukkit.event.player.PlayerToggleSneakEvent) {}
     fun onToggleGlide(player: org.bukkit.entity.Player, item: org.bukkit.inventory.ItemStack, event: org.bukkit.event.entity.EntityToggleGlideEvent) {}
+    fun onBlockBreak(event: org.bukkit.event.block.BlockBreakEvent) {}
 }

src/main/kotlin/net/hareworks/hcu/items/config/Config.kt

@@ -11,6 +11,13 @@ object Config {
     var doubleJumpPowerVertical: Double = 0.5
     var doubleJumpPowerForward: Double = 0.3
     
+    // Vein Miner
+    data class ToolCategory(val toolPattern: String, val allowedBlockPatterns: List<String>)
+    var veinMinerMaxBlocks: Int = 64
+    var veinMinerActivationMode: String = "SNEAK" // "SNEAK", "ALWAYS", "STAND"
+    val veinMinerCompatibleMaterials: MutableMap<org.bukkit.Material, Set<org.bukkit.Material>> = mutableMapOf()
+    val veinMinerToolCategories: MutableList<ToolCategory> = mutableListOf()
+
     fun load(plugin: JavaPlugin) {
         plugin.reloadConfig()
         val config = plugin.config
@@ -23,6 +30,12 @@ object Config {
         doubleJumpPowerVertical = config.getDouble("components.double_jump.power.vertical", 0.5)
         doubleJumpPowerForward = config.getDouble("components.double_jump.power.forward", 0.3)
         
+        // Vein Miner
+        veinMinerMaxBlocks = config.getInt("components.vein_miner.max_blocks", 64)
+        veinMinerActivationMode = config.getString("components.vein_miner.activation_mode", "SNEAK") ?: "SNEAK"
+        loadCompatibleGroups(config)
+        loadToolCategories(config)
+        
         // Save back to ensure defaults are written if missing
         saveDefaults(plugin, config)
     }
@@ -33,7 +46,45 @@ object Config {
         config.addDefault("components.double_jump.power.vertical", 0.5)
         config.addDefault("components.double_jump.power.forward", 0.3)
         
+        config.addDefault("components.vein_miner.max_blocks", 64)
+        // Groups default is complex to add here, relying on config.yml resource or existing file
+        
+        // Tool categories default is handled by config.yml resource
+        
         config.options().copyDefaults(true)
         plugin.saveConfig()
     }
+
+    private fun loadCompatibleGroups(config: FileConfiguration) {
+        veinMinerCompatibleMaterials.clear()
+        val groups = config.getList("components.vein_miner.compatible_groups") as? List<*> ?: return
+        
+        for (groupObj in groups) {
+            val group = groupObj as? List<*> ?: continue
+            val materials = group.mapNotNull { 
+                val name = (it as? String) ?: return@mapNotNull null
+                try {
+                    org.bukkit.Material.valueOf(name.uppercase().removePrefix("MINECRAFT:"))
+                } catch (e: IllegalArgumentException) {
+                    null 
+                }
+            }.toSet()
+            
+            for (mat in materials) {
+                val existing = veinMinerCompatibleMaterials.getOrDefault(mat, emptySet())
+                veinMinerCompatibleMaterials[mat] = existing + materials
+            }
+        }
+    }
+
+    private fun loadToolCategories(config: FileConfiguration) {
+        veinMinerToolCategories.clear()
+        val list = config.getMapList("components.vein_miner.tool_categories")
+        
+        for (map in list) {
+            val toolPattern = map["tool_pattern"] as? String ?: continue
+            val allowedBlocks = (map["allowed_blocks"] as? List<*>)?.filterIsInstance<String>() ?: continue
+            veinMinerToolCategories.add(ToolCategory(toolPattern, allowedBlocks))
+        }
+    }
 }

src/main/kotlin/net/hareworks/hcu/items/content/components/VeinMinerComponent.kt

@@ -0,0 +1,311 @@
+package net.hareworks.hcu.items.content.components
+
+import net.hareworks.hcu.items.api.component.EquippableComponent
+import net.hareworks.hcu.items.api.Tier
+import net.hareworks.hcu.items.config.Config
+import org.bukkit.Material
+import org.bukkit.NamespacedKey
+import org.bukkit.block.Block
+import org.bukkit.entity.Player
+import org.bukkit.event.block.BlockBreakEvent
+import org.bukkit.inventory.ItemStack
+import org.bukkit.persistence.PersistentDataType
+import org.bukkit.plugin.java.JavaPlugin
+import org.bukkit.inventory.meta.Damageable
+import org.bukkit.enchantments.Enchantment
+import org.bukkit.entity.ExperienceOrb
+import org.bukkit.entity.BlockDisplay
+import org.bukkit.entity.Display
+import org.bukkit.util.Transformation
+import org.joml.Vector3f
+import org.bukkit.Color
+import org.bukkit.Bukkit
+import java.util.LinkedList
+import java.util.Queue
+import java.util.Random
+import java.util.UUID
+
+class VeinMinerComponent(private val plugin: JavaPlugin) : EquippableComponent {
+
+    override val key: NamespacedKey = NamespacedKey(plugin, "vein_miner")
+    override val displayName: String = "Vein Miner"
+    override val maxTier: Int = 1
+    override val minTier: Int = 1
+
+    private val activeHighlights = mutableMapOf<UUID, HighlightSession>()
+
+    data class HighlightSession(
+        val centerBlock: Block,
+        val entities: List<BlockDisplay>,
+        val lastUpdate: Long
+    )
+
+    override fun apply(item: ItemStack, tier: Tier?) {
+        val meta = item.itemMeta ?: return
+        meta.persistentDataContainer.set(key, PersistentDataType.BYTE, 1.toByte())
+        item.itemMeta = meta
+    }
+
+    override fun has(item: ItemStack): Boolean {
+        if (item.type.isAir) return false
+        return item.itemMeta?.persistentDataContainer?.has(key, PersistentDataType.BYTE) == true
+    }
+    
+    override fun remove(item: ItemStack) {
+        val meta = item.itemMeta ?: return
+        meta.persistentDataContainer.remove(key)
+        item.itemMeta = meta
+    }
+
+    override fun onTick(player: Player, item: ItemStack) {
+        // ハイライト条件チェック (Sneakしながら)
+        if (!player.isSneaking) {
+            clearHighlight(player)
+            return
+        }
+        
+        // ターゲットブロック取得
+        val targetBlock = player.getTargetBlockExact(5)
+        if (targetBlock == null || targetBlock.type == Material.AIR) {
+            clearHighlight(player)
+            return
+        }
+
+        // 既存ハイライトの更新不要チェック
+        val session = activeHighlights[player.uniqueId]
+        if (session != null && session.centerBlock == targetBlock) {
+             return 
+        }
+
+        // ハイライト再生成
+        clearHighlight(player)
+
+        // 破壊対象計算
+        val blocksToBreak = calculateBreakList(player, targetBlock, item)
+        if (blocksToBreak.isEmpty()) return
+        
+        // ハイライトエンティティ生成
+        val entities = mutableListOf<BlockDisplay>()
+        
+        // クライアントのパフォーマンスを考慮し、最大ハイライト数を制限しても良いが、
+        // ユーザー要望通り全てハイライトする
+        for (block in blocksToBreak) {
+            val loc = block.location.add(0.5, 0.5, 0.5)
+            try {
+                // BlockDisplay生成
+                val display = block.world.spawn(loc, BlockDisplay::class.java) { e -> 
+                    e.block = block.blockData
+                    // 少し大きくして元のブロックを覆う
+                    e.transformation = Transformation(
+                        Vector3f(0f, 0f, 0f),
+                        org.joml.AxisAngle4f(0f, 0f, 0f, 0f),
+                        Vector3f(1.01f, 1.01f, 1.01f), 
+                        org.joml.AxisAngle4f(0f, 0f, 0f, 0f)
+                    )
+                    e.isGlowing = true
+                    e.glowColorOverride = Color.AQUA // 鮮やかな色
+                    e.brightness = Display.Brightness(15, 15) // 最大輝度
+                    e.isVisibleByDefault = false
+                }
+                player.showEntity(plugin, display)
+                entities.add(display)
+            } catch (e: Exception) {
+                // 1.19.4未満などのケース
+            }
+        }
+        
+        activeHighlights[player.uniqueId] = HighlightSession(targetBlock, entities, System.currentTimeMillis())
+    }
+    
+    // アイテム持ち替えやスニーク解除時にも消えるように
+    override fun onUnequip(player: Player, item: ItemStack) {
+        clearHighlight(player)
+    }
+
+    private fun clearHighlight(player: Player) {
+        val session = activeHighlights.remove(player.uniqueId) ?: return
+        for (e in session.entities) {
+            e.remove()
+        }
+    }
+
+    override fun onBlockBreak(event: BlockBreakEvent) {
+        if (event.isCancelled) return
+        val player = event.player
+        val block = event.block
+        val item = player.inventory.itemInMainHand
+
+        // 発動条件チェック
+        if (!shouldActivate(player)) return
+
+        // 破壊対象リスト
+        val blocksToBreak = calculateBreakList(player, block, item)
+        
+        // 単一破壊（連鎖なし）なら何もしない（通常のイベントに任せる）
+        if (blocksToBreak.size <= 1) return
+
+        // ハイライト消去
+        clearHighlight(player)
+        
+        val dropLocation = block.location.add(0.5, 0.5, 0.5)
+        val hasSilkTouch = item.containsEnchantment(Enchantment.SILK_TOUCH)
+
+        var soundPlayed = false
+
+        for (target in blocksToBreak) {
+            if (target == block) continue // 起点ブロックはイベントフローで破壊される
+            
+            // 保護プラグインチェック (擬似イベント)
+            val checkEvent = BlockBreakEvent(target, player)
+            Bukkit.getPluginManager().callEvent(checkEvent)
+            if (checkEvent.isCancelled) continue
+
+            // 演出 (最初の1回だけ、または確率で)
+            if (!soundPlayed) {
+                target.world.playSound(target.location, target.blockSoundGroup.breakSound, 1f, 1f)
+                target.world.spawnParticle(org.bukkit.Particle.BLOCK, target.location.add(0.5,0.5,0.5), 10, 0.3, 0.3, 0.3, target.blockData)
+                soundPlayed = true
+            }
+
+            // ドロップ処理
+            val drops = target.getDrops(item)
+            for (drop in drops) {
+                target.world.dropItem(dropLocation, drop)
+            }
+            
+            // 経験値
+            if (!hasSilkTouch) {
+                val xp = getExpFromBlock(target.type)
+                if (xp > 0) {
+                     val orb = target.world.spawn(dropLocation, ExperienceOrb::class.java)
+                     orb.experience = xp
+                }
+            }
+            
+            // ブロック消去
+            target.type = Material.AIR
+            
+            // 耐久消費
+            damageItem(player, item)
+        }
+    }
+
+    private fun shouldActivate(player: Player): Boolean {
+        return when (Config.veinMinerActivationMode) {
+            "SNEAK" -> player.isSneaking
+            "STAND" -> !player.isSneaking
+            "ALWAYS" -> true
+            else -> player.isSneaking
+        }
+    }
+
+    private fun calculateBreakList(player: Player, startBlock: Block, item: ItemStack): Set<Block> {
+        val visited = mutableSetOf<Block>()
+        
+        // ターゲット適正チェック
+        if (!isValidTarget(startBlock, item)) return emptySet()
+        
+        // 互換ブロックタイプ抽出
+        val startType = startBlock.type
+        val targetMaterials = Config.veinMinerCompatibleMaterials[startType] ?: setOf()
+        val efficientTargets = if (targetMaterials.isNotEmpty()) targetMaterials else setOf(startType)
+
+        val queue: Queue<Block> = LinkedList()
+        visited.add(startBlock)
+        queue.add(startBlock)
+        
+        val max = Config.veinMinerMaxBlocks
+        // 見つかったブロックの実リスト
+        val foundBlocks = mutableSetOf<Block>()
+        foundBlocks.add(startBlock)
+        
+        while (queue.isNotEmpty() && foundBlocks.size < max) {
+            val current = queue.poll()
+            
+            // 隣接チェック
+             for (x in -1..1) {
+                for (y in -1..1) {
+                    for (z in -1..1) {
+                        if (x == 0 && y == 0 && z == 0) continue
+                        val neighbor = current.getRelative(x, y, z)
+                        
+                        if (visited.contains(neighbor)) continue
+                        
+                        if (efficientTargets.contains(neighbor.type)) {
+                            visited.add(neighbor)
+                            
+                            // まだ破壊できるならQueueに追加
+                            if (foundBlocks.size < max) {
+                                foundBlocks.add(neighbor)
+                                queue.add(neighbor)
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        
+        return foundBlocks
+    }
+    
+    private fun isValidTarget(block: Block, item: ItemStack): Boolean {
+         if (block.getDrops(item).isEmpty()) return false
+         
+         val itemName = item.type.key.toString()
+         val blockName = block.type.key.toString()
+         
+         var isAllowed = false
+         for (category in Config.veinMinerToolCategories) {
+            if (itemName.contains(category.toolPattern)) {
+                for (pattern in category.allowedBlockPatterns) {
+                     if (blockName.contains(pattern)) {
+                         isAllowed = true
+                         break
+                     }
+                }
+            }
+            if (isAllowed) break
+         }
+         return isAllowed
+    }
+    
+    private fun damageItem(player: Player, item: ItemStack) {
+        val meta = item.itemMeta as? Damageable ?: return
+        val unbreakingLevel = item.getEnchantmentLevel(Enchantment.UNBREAKING)
+
+        if (unbreakingLevel > 0) {
+            val random = Random()
+            if (random.nextInt(unbreakingLevel + 1) > 0) {
+                return 
+            }
+        }
+
+        val maxDamage = item.type.maxDurability
+        if (maxDamage > 0) {
+             val newDamage = meta.damage + 1
+             if (newDamage >= maxDamage) {
+                 item.amount = 0
+                 player.world.playSound(player.location, org.bukkit.Sound.ENTITY_ITEM_BREAK, 1f, 1f)
+             } else {
+                 meta.damage = newDamage
+                 item.itemMeta = meta
+             }
+        }
+    }
+
+    private fun getExpFromBlock(type: Material): Int {
+        val random = Random()
+        return when (type) {
+            Material.COAL_ORE, Material.DEEPSLATE_COAL_ORE -> random.nextInt(3)
+            Material.DIAMOND_ORE, Material.DEEPSLATE_DIAMOND_ORE -> random.nextInt(5) + 3
+            Material.EMERALD_ORE, Material.DEEPSLATE_EMERALD_ORE -> random.nextInt(5) + 3
+            Material.LAPIS_ORE, Material.DEEPSLATE_LAPIS_ORE -> random.nextInt(4) + 2
+            Material.NETHER_QUARTZ_ORE -> random.nextInt(4) + 2
+            Material.REDSTONE_ORE, Material.DEEPSLATE_REDSTONE_ORE -> random.nextInt(5) + 1
+            Material.NETHER_GOLD_ORE -> random.nextInt(2)
+            Material.SCULK -> 1
+            Material.SPAWNER -> random.nextInt(29) + 15
+            else -> 0
+        }
+    }
+}

src/main/kotlin/net/hareworks/hcu/items/listeners/EventListener.kt

@@ -121,6 +121,15 @@ class EventListener(private val plugin: Plugin) : Listener {
         }
     }
 
+    @EventHandler
+    fun onBlockBreak(event: org.bukkit.event.block.BlockBreakEvent) {
+        val player = event.player
+        val item = player.inventory.itemInMainHand
+        
+        // Dispatch to components on the main hand item
+        dispatchToComponents(item) { it.onBlockBreak(event) }
+    }
+
     private fun tickComponents() {
         for (player in plugin.server.onlinePlayers) {
             val items = getEquipmentItems(player)

src/main/resources/config.yml

@@ -6,3 +6,45 @@ components:
     power:
       vertical: 0.5
       forward: 0.3
+  vein_miner:
+    max_blocks: 64
+    activation_mode: "SNEAK" # SNEAK, ALWAYS, STAND
+    compatible_groups:
+      - [ "minecraft:diamond_ore", "minecraft:deepslate_diamond_ore" ]
+      - [ "minecraft:iron_ore", "minecraft:deepslate_iron_ore" ]
+      - [ "minecraft:gold_ore", "minecraft:deepslate_gold_ore" ]
+      - [ "minecraft:copper_ore", "minecraft:deepslate_copper_ore" ]
+      - [ "minecraft:coal_ore", "minecraft:deepslate_coal_ore" ]
+      - [ "minecraft:redstone_ore", "minecraft:deepslate_redstone_ore" ]
+      - [ "minecraft:lapis_ore", "minecraft:deepslate_lapis_ore" ]
+      - [ "minecraft:emerald_ore", "minecraft:deepslate_emerald_ore" ]
+    tool_categories:
+      - tool_pattern: "_pickaxe"
+        allowed_blocks:
+          - "_ore"
+          - "minecraft:ancient_debris"
+          - "minecraft:amethyst_block"
+          - "minecraft:budding_amethyst"
+          - "minecraft:obsidian"
+      - tool_pattern: "_axe"
+        allowed_blocks:
+          - "_log"
+          - "_stem"
+          - "_hyphae"
+          - "minecraft:mangrove_roots"
+          - "minecraft:bamboo_block"
+      - tool_pattern: "_shovel"
+        allowed_blocks:
+          - "minecraft:clay"
+          - "minecraft:gravel"
+          - "minecraft:soul_sand"
+          - "minecraft:soul_soil"
+          - "minecraft:mud"
+          - "minecraft:snow"
+      - tool_pattern: "_hoe"
+        allowed_blocks:
+          - "_leaves"
+          - "minecraft:nether_wart_block"
+          - "minecraft:shroomlight"
+          - "minecraft:hay_block"
+