rockslug.kts combat script

Author: lare96

src/main/kotlin/game/game/combat/npcHooks/rockslug.kts

@@ -0,0 +1,70 @@
+package game.combat.npcHooks
+
+import api.combat.npc.NpcCombatHandler.combat
+import io.luna.game.action.impl.LockedAction
+import io.luna.game.model.mob.Player
+import io.luna.game.model.mob.block.Animation
+import io.luna.game.model.mob.block.Animation.AnimationPriority
+import io.luna.game.model.mob.block.Graphic
+import io.luna.game.model.mob.combat.damage.CombatDamageRequest
+
+/**
+ * The lowest health a rockslug can be reduced to through normal damage.
+ */
+val HITPOINTS_THRESHOLD = 5
+
+/**
+ * The bag of salt item id.
+ */
+val BAG_OF_SALT = 4161
+
+/**
+ * The animation played when a player uses salt on a weakened rockslug.
+ */
+val SALT_ANIMATION = Animation(1574)
+
+/**
+ * The graphic displayed when salt is used on a weakened rockslug.
+ */
+val SALT_GRAPHIC = Graphic(327, 0, 0)
+
+/*
+ * Handles rockslug finishing behaviour.
+ *
+ * When an incoming hit would reduce a rockslug to or below the finishing threshold, the normal damage is cancelled and
+ * the slug is left at 1 hitpoint. If the attacker is a player carrying a bag of salt, the player performs the
+ * salting sequence and the slug is killed shortly after.
+ *
+ * If the player does not have salt, they will always hit 0.
+ */
+combat(1622, 1623) {
+    defend {
+        val damageAmount = damage?.rawAmount ?: 0
+        if (other is Player && npc.health - damageAmount <= HITPOINTS_THRESHOLD) {
+
+            if (other.inventory.remove(BAG_OF_SALT)) {
+                damage = null
+                npc.combat.isDisabled = true
+                npc.walking.isLocked = true
+                npc.health = 1
+                other.combat.target = null
+                other.submitAction(object : LockedAction(other, false, 1) {
+                    override fun run(): Boolean {
+                        if (executions == 0) {
+                            other.animation(SALT_ANIMATION)
+                            npc.graphic(SALT_GRAPHIC)
+                            other.sendMessage("You pour some salt on the Rockslug.")
+                            npc.animation(Animation(npc.combatDef().deathAnimation, AnimationPriority.HIGH))
+                        } else if (executions == 1) {
+                            npc.health = 0
+                            return true
+                        }
+                        return false
+                    }
+                })
+            } else {
+                damage = CombatDamageRequest.zero(other, npc).resolve()
+            }
+        }
+    }
+}