Update abattr callsites in battler-tags

Also removed stat drop ability application from cancelling ME stat boost effects

src/data/abilities/ability.ts

@@ -1402,6 +1402,12 @@ export class PostDefendMoveDisableAbAttr extends PostDefendAbAttr {
 
 export class PostStatStageChangeAbAttr extends AbAttr {
   private declare readonly _: never;
+
+  override canApply(_params: Closed<PostStatStageChangeAbAttrParams>) {
+    return true;
+  }
+
+  override apply(_params: Closed<PostStatStageChangeAbAttrParams>) {}
 }
 
 export interface PostStatStageChangeAbAttrParams extends AbAttrBaseParams {
@@ -3415,9 +3421,12 @@ export interface PreStatStageChangeAbAttrParams extends AbAttrBaseParams {
   stat: BattleStat;
   /** The amount of stages to change by (negative if the stat is being decreased) */
   stages: number;
-  /** The source of the stat stage drop */
+  /** The source of the stat stage drop. May be omitted if the source of the stat drop is the user itself.
-  source: Pokemon;
+   *
-  // Note: `cancelled` already exists in `AbAttrBaseParams`, though we redefine it here to change its tsdoc
+   * @remarks
+   * Currently, only used by {@linkcode ReflectStatStageChangeAbAttr} in order to reflect the stat stage change
+   */
+  source?: Pokemon;
   /** Holder that will be set to true if the stat stage change should be cancelled due to the ability */
   cancelled: BooleanHolder;
 }
@@ -3440,10 +3449,17 @@ export class ReflectStatStageChangeAbAttr extends PreStatStageChangeAbAttr {
   /** {@linkcode BattleStat} to reflect */
   private reflectedStat?: BattleStat;
 
+  override canApply({ source, cancelled }: PreStatStageChangeAbAttrParams): boolean {
+    return !!source && !cancelled.value;
+  }
+
   /**
    * Apply the {@linkcode ReflectStatStageChangeAbAttr} to an interaction
    */
   override apply({ source, cancelled, stat, simulated, stages }: PreStatStageChangeAbAttrParams): void {
+    if (!source) {
+      return;
+    }
     this.reflectedStat = stat;
     if (!simulated) {
       globalScene.phaseManager.unshiftNew(

src/data/arena-tag.ts

@@ -946,7 +946,7 @@ class StealthRockTag extends ArenaTrapTag {
 
   override activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
     const cancelled = new BooleanHolder(false);
-    applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
+    applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon, cancelled });
     if (cancelled.value) {
       return false;
     }
@@ -1003,7 +1003,12 @@ class StickyWebTag extends ArenaTrapTag {
   override activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
     if (pokemon.isGrounded()) {
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs("ProtectStatAbAttr", pokemon, cancelled);
+      applyAbAttrs("ProtectStatAbAttr", {
+        pokemon,
+        cancelled,
+        stat: Stat.SPD,
+        stages: -1,
+      });
 
       if (simulated) {
         return !cancelled.value;
@@ -1416,7 +1421,9 @@ export class SuppressAbilitiesTag extends ArenaTag {
 
       for (const fieldPokemon of globalScene.getField(true)) {
         if (fieldPokemon && fieldPokemon.id !== pokemon.id) {
-          [true, false].forEach(passive => applyOnLoseAbAttrs(fieldPokemon, passive));
+          // TODO: investigate whether we can just remove the foreach and call `applyAbAttrs` directly, providing
+          // the appropriate attributes (preLEaveField and IllusionBreak)
+          [true, false].forEach(passive => applyOnLoseAbAttrs({ pokemon: fieldPokemon, passive }));
         }
       }
     }

src/data/battler-tags.ts

@@ -621,7 +621,7 @@ export class FlinchedTag extends BattlerTag {
           pokemonNameWithAffix: getPokemonNameWithAffix(pokemon),
         }),
       );
-      applyAbAttrs("FlinchEffectAbAttr", pokemon, null);
+      applyAbAttrs("FlinchEffectAbAttr", { pokemon });
       return true;
     }
 
@@ -916,7 +916,7 @@ export class SeedTag extends BattlerTag {
       const source = pokemon.getOpponents().find(o => o.getBattlerIndex() === this.sourceIndex);
       if (source) {
         const cancelled = new BooleanHolder(false);
-        applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
+        applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon, cancelled });
 
         if (!cancelled.value) {
           globalScene.phaseManager.unshiftNew(
@@ -1006,7 +1006,7 @@ export class PowderTag extends BattlerTag {
     globalScene.phaseManager.unshiftNew("CommonAnimPhase", idx, idx, CommonAnim.POWDER);
 
     const cancelDamage = new BooleanHolder(false);
-    applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelDamage);
+    applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon, cancelled: cancelDamage });
     if (!cancelDamage.value) {
       pokemon.damageAndUpdate(Math.floor(pokemon.getMaxHp() / 4), { result: HitResult.INDIRECT });
     }
@@ -1056,7 +1056,7 @@ export class NightmareTag extends BattlerTag {
       phaseManager.unshiftNew("CommonAnimPhase", pokemon.getBattlerIndex(), undefined, CommonAnim.CURSE); // TODO: Update animation type
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon, cancelled });
 
       if (!cancelled.value) {
         pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 4), { result: HitResult.INDIRECT });
@@ -1409,7 +1409,7 @@ export abstract class DamagingTrapTag extends TrappedTag {
       phaseManager.unshiftNew("CommonAnimPhase", pokemon.getBattlerIndex(), undefined, this.commonAnim);
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon, cancelled });
 
       if (!cancelled.value) {
         pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 8), { result: HitResult.INDIRECT });
@@ -1642,7 +1642,7 @@ export class ContactDamageProtectedTag extends ContactProtectedTag {
    */
   override onContact(attacker: Pokemon, user: Pokemon): void {
     const cancelled = new BooleanHolder(false);
-    applyAbAttrs("BlockNonDirectDamageAbAttr", user, cancelled);
+    applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon: user, cancelled });
     if (!cancelled.value) {
       attacker.damageAndUpdate(toDmgValue(attacker.getMaxHp() * (1 / this.damageRatio)), {
         result: HitResult.INDIRECT,
@@ -2243,7 +2243,7 @@ export class SaltCuredTag extends BattlerTag {
       );
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon, cancelled });
 
       if (!cancelled.value) {
         const pokemonSteelOrWater = pokemon.isOfType(PokemonType.STEEL) || pokemon.isOfType(PokemonType.WATER);
@@ -2297,7 +2297,7 @@ export class CursedTag extends BattlerTag {
       );
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon, cancelled });
 
       if (!cancelled.value) {
         pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 4), { result: HitResult.INDIRECT });
@@ -2632,7 +2632,7 @@ export class GulpMissileTag extends BattlerTag {
       }
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs("BlockNonDirectDamageAbAttr", attacker, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon: attacker, cancelled });
 
       if (!cancelled.value) {
         attacker.damageAndUpdate(Math.max(1, Math.floor(attacker.getMaxHp() / 4)), { result: HitResult.INDIRECT });
@@ -3021,14 +3021,7 @@ export class MysteryEncounterPostSummonTag extends BattlerTag {
     const ret = super.lapse(pokemon, lapseType);
 
     if (lapseType === BattlerTagLapseType.CUSTOM) {
-      const cancelled = new BooleanHolder(false);
+      pokemon.mysteryEncounterBattleEffects?.(pokemon);
-      applyAbAttrs("ProtectStatAbAttr", pokemon, cancelled);
-      applyAbAttrs("ConditionalUserFieldProtectStatAbAttr", pokemon, cancelled, false, pokemon);
-      if (!cancelled.value) {
-        if (pokemon.mysteryEncounterBattleEffects) {
-          pokemon.mysteryEncounterBattleEffects(pokemon);
-        }
-      }
     }
 
     return ret;

src/phases/new-biome-encounter-phase.ts

@@ -14,7 +14,7 @@ export class NewBiomeEncounterPhase extends NextEncounterPhase {
       if (pokemon) {
         pokemon.resetBattleAndWaveData();
         if (pokemon.isOnField()) {
-          applyAbAttrs("PostBiomeChangeAbAttr", pokemon, null);
+          applyAbAttrs("PostBiomeChangeAbAttr", { pokemon });
         }
       }
     }

src/phases/obtain-status-effect-phase.ts

@@ -8,7 +8,7 @@ import type Pokemon from "#app/field/pokemon";
 import { getPokemonNameWithAffix } from "#app/messages";
 import { PokemonPhase } from "./pokemon-phase";
 import { SpeciesFormChangeStatusEffectTrigger } from "#app/data/pokemon-forms/form-change-triggers";
-import { applyPostSetStatusAbAttrs } from "#app/data/abilities/apply-ab-attrs";
+import { applyAbAttrs } from "#app/data/abilities/apply-ab-attrs";
 import { isNullOrUndefined } from "#app/utils/common";
 
 export class ObtainStatusEffectPhase extends PokemonPhase {
@@ -53,7 +53,11 @@ export class ObtainStatusEffectPhase extends PokemonPhase {
             globalScene.triggerPokemonFormChange(pokemon, SpeciesFormChangeStatusEffectTrigger, true);
             // If mold breaker etc was used to set this status, it shouldn't apply to abilities activated afterwards
             globalScene.arena.setIgnoreAbilities(false);
-            applyPostSetStatusAbAttrs("PostSetStatusAbAttr", pokemon, this.statusEffect, this.sourcePokemon);
+            applyAbAttrs("PostSetStatusAbAttr", {
+              pokemon,
+              effect: this.statusEffect,
+              sourcePokemon: this.sourcePokemon ?? undefined,
+            });
           }
           this.end();
         });

src/phases/post-summon-activate-ability-phase.ts

@@ -1,4 +1,4 @@
-import { applyPostSummonAbAttrs } from "#app/data/abilities/apply-ab-attrs";
+import { applyAbAttrs } from "#app/data/abilities/apply-ab-attrs";
 import { PostSummonPhase } from "#app/phases/post-summon-phase";
 import type { BattlerIndex } from "#enums/battler-index";
 
@@ -16,7 +16,8 @@ export class PostSummonActivateAbilityPhase extends PostSummonPhase {
   }
 
   start() {
-    applyPostSummonAbAttrs("PostSummonAbAttr", this.getPokemon(), this.passive, false);
+    // TODO: Check with Dean on whether or not passive must be provided to `this.passive`
+    applyAbAttrs("PostSummonAbAttr", { pokemon: this.getPokemon(), passive: this.passive });
 
     this.end();
   }

src/phases/post-summon-phase.ts

@@ -28,7 +28,7 @@ export class PostSummonPhase extends PokemonPhase {
 
     const field = pokemon.isPlayer() ? globalScene.getPlayerField() : globalScene.getEnemyField();
     for (const p of field) {
-      applyAbAttrs("CommanderAbAttr", p, null, false);
+      applyAbAttrs("CommanderAbAttr", { pokemon: p });
     }
 
     this.end();

src/phases/post-turn-status-effect-phase.ts

@@ -1,6 +1,6 @@
 import { globalScene } from "#app/global-scene";
 import type { BattlerIndex } from "#enums/battler-index";
-import { applyAbAttrs, applyPostDamageAbAttrs } from "#app/data/abilities/apply-ab-attrs";
+import { applyAbAttrs } from "#app/data/abilities/apply-ab-attrs";
 import { CommonBattleAnim } from "#app/data/battle-anims";
 import { CommonAnim } from "#enums/move-anims-common";
 import { getStatusEffectActivationText } from "#app/data/status-effect";
@@ -22,8 +22,8 @@ export class PostTurnStatusEffectPhase extends PokemonPhase {
     if (pokemon?.isActive(true) && pokemon.status && pokemon.status.isPostTurn() && !pokemon.switchOutStatus) {
       pokemon.status.incrementTurn();
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", { pokemon, cancelled });
-      applyAbAttrs("BlockStatusDamageAbAttr", pokemon, cancelled);
+      applyAbAttrs("BlockStatusDamageAbAttr", { pokemon, cancelled });
 
       if (!cancelled.value) {
         globalScene.phaseManager.queueMessage(
@@ -39,14 +39,14 @@ export class PostTurnStatusEffectPhase extends PokemonPhase {
             break;
           case StatusEffect.BURN:
             damage.value = Math.max(pokemon.getMaxHp() >> 4, 1);
-            applyAbAttrs("ReduceBurnDamageAbAttr", pokemon, null, false, damage);
+            applyAbAttrs("ReduceBurnDamageAbAttr", { pokemon, burnDamage: damage });
             break;
         }
         if (damage.value) {
           // Set preventEndure flag to avoid pokemon surviving thanks to focus band, sturdy, endure ...
           globalScene.damageNumberHandler.add(this.getPokemon(), pokemon.damage(damage.value, false, true));
           pokemon.updateInfo();
-          applyPostDamageAbAttrs("PostDamageAbAttr", pokemon, damage.value, pokemon.hasPassive(), false, []);
+          applyAbAttrs("PostDamageAbAttr", { pokemon, damage: damage.value });
         }
         new CommonBattleAnim(CommonAnim.POISON + (pokemon.status.effect - 1), pokemon).play(false, () => this.end());
       } else {

src/phases/quiet-form-change-phase.ts

@@ -181,9 +181,10 @@ export class QuietFormChangePhase extends BattlePhase {
       }
     }
     if (this.formChange.trigger instanceof SpeciesFormChangeTeraTrigger) {
-      applyAbAttrs("PostTeraFormChangeStatChangeAbAttr", this.pokemon, null);
+      const params = { pokemon: this.pokemon };
-      applyAbAttrs("ClearWeatherAbAttr", this.pokemon, null);
+      applyAbAttrs("PostTeraFormChangeStatChangeAbAttr", params);
-      applyAbAttrs("ClearTerrainAbAttr", this.pokemon, null);
+      applyAbAttrs("ClearWeatherAbAttr", params);
+      applyAbAttrs("ClearTerrainAbAttr", params);
     }
 
     super.end();

src/phases/stat-stage-change-phase.ts

@@ -1,10 +1,6 @@
 import { globalScene } from "#app/global-scene";
 import type { BattlerIndex } from "#enums/battler-index";
-import {
+import { applyAbAttrs } from "#app/data/abilities/apply-ab-attrs";
-  applyAbAttrs,
-  applyPostStatStageChangeAbAttrs,
-  applyPreStatStageChangeAbAttrs,
-} from "#app/data/abilities/apply-ab-attrs";
 import { MistTag } from "#app/data/arena-tag";
 import { ArenaTagSide } from "#enums/arena-tag-side";
 import type { ArenaTag } from "#app/data/arena-tag";
@@ -18,6 +14,10 @@ import { PokemonPhase } from "./pokemon-phase";
 import { Stat, type BattleStat, getStatKey, getStatStageChangeDescriptionKey } from "#enums/stat";
 import { OctolockTag } from "#app/data/battler-tags";
 import { ArenaTagType } from "#app/enums/arena-tag-type";
+import type {
+  ConditionalUserFieldProtectStatAbAttrParams,
+  PreStatStageChangeAbAttrParams,
+} from "#app/@types/ability-types";
 
 export type StatStageChangeCallback = (
   target: Pokemon | null,
@@ -126,7 +126,7 @@ export class StatStageChangePhase extends PokemonPhase {
     const stages = new NumberHolder(this.stages);
 
     if (!this.ignoreAbilities) {
-      applyAbAttrs("StatStageChangeMultiplierAbAttr", pokemon, null, false, stages);
+      applyAbAttrs("StatStageChangeMultiplierAbAttr", { pokemon, numStages: stages });
     }
 
     let simulate = false;
@@ -146,42 +146,38 @@ export class StatStageChangePhase extends PokemonPhase {
       }
 
       if (!cancelled.value && !this.selfTarget && stages.value < 0) {
-        applyPreStatStageChangeAbAttrs("ProtectStatAbAttr", pokemon, stat, cancelled, simulate);
+        const abAttrParams: PreStatStageChangeAbAttrParams & ConditionalUserFieldProtectStatAbAttrParams = {
-        applyPreStatStageChangeAbAttrs(
-          "ConditionalUserFieldProtectStatAbAttr",
           pokemon,
           stat,
           cancelled,
-          simulate,
+          simulated: simulate,
-          pokemon,
+          target: pokemon,
-        );
+          stages: this.stages,
+        };
+        applyAbAttrs("ProtectStatAbAttr", abAttrParams);
+        applyAbAttrs("ConditionalUserFieldProtectStatAbAttr", abAttrParams);
+        // TODO: Consider skipping this call if `cancelled` is false.
         const ally = pokemon.getAlly();
         if (!isNullOrUndefined(ally)) {
-          applyPreStatStageChangeAbAttrs(
+          applyAbAttrs("ConditionalUserFieldProtectStatAbAttr", { ...abAttrParams, pokemon: ally });
-            "ConditionalUserFieldProtectStatAbAttr",
-            ally,
-            stat,
-            cancelled,
-            simulate,
-            pokemon,
-          );
         }
 
         /** Potential stat reflection due to Mirror Armor, does not apply to Octolock end of turn effect */
         if (
           opponentPokemon !== undefined &&
+          // TODO: investigate whether this is stoping mirror armor from applying to non-octolock
+          // reasons for stat drops if the user has the Octolock tag
           !pokemon.findTag(t => t instanceof OctolockTag) &&
           !this.comingFromMirrorArmorUser
         ) {
-          applyPreStatStageChangeAbAttrs(
+          applyAbAttrs("ReflectStatStageChangeAbAttr", {
-            "ReflectStatStageChangeAbAttr",
             pokemon,
             stat,
             cancelled,
-            simulate,
+            simulated: simulate,
-            opponentPokemon,
+            source: opponentPokemon,
-            this.stages,
+            stages: this.stages,
-          );
+          });
         }
       }
 
@@ -222,17 +218,16 @@ export class StatStageChangePhase extends PokemonPhase {
 
       if (stages.value > 0 && this.canBeCopied) {
         for (const opponent of pokemon.getOpponents()) {
-          applyAbAttrs("StatStageChangeCopyAbAttr", opponent, null, false, this.stats, stages.value);
+          applyAbAttrs("StatStageChangeCopyAbAttr", { pokemon: opponent, stats: this.stats, numStages: stages.value });
         }
       }
 
-      applyPostStatStageChangeAbAttrs(
+      applyAbAttrs("PostStatStageChangeAbAttr", {
-        "PostStatStageChangeAbAttr",
         pokemon,
-        filteredStats,
+        stats: filteredStats,
-        this.stages,
+        stages: this.stages,
-        this.selfTarget,
+        selfTarget: this.selfTarget,
-      );
+      });
 
       // Look for any other stat change phases; if this is the last one, do White Herb check
       const existingPhase = globalScene.phaseManager.findPhase(