add` CanLearnMoveRequirement`

src/data/mystery-encounters/mystery-encounter-requirements.ts

@@ -31,8 +31,8 @@ export abstract class EncounterSceneRequirement implements EncounterRequirement
 }
 
 export abstract class EncounterPokemonRequirement implements EncounterRequirement {
-  protected minNumberOfPokemon: number;
+  public minNumberOfPokemon: number;
-  protected invertQuery: boolean;
+  public invertQuery: boolean;
 
   abstract meetsRequirement(scene: BattleScene): boolean;
 

src/data/mystery-encounters/requirements/can-learn-move-requirement.ts

@@ -0,0 +1,113 @@
+import BattleScene from "#app/battle-scene.js";
+import { Moves } from "#app/enums/moves.js";
+import { PlayerPokemon } from "#app/field/pokemon.js";
+import { isNullOrUndefined } from "#app/utils.js";
+import { EncounterPokemonRequirement } from "../mystery-encounter-requirements";
+
+/**
+ * {@linkcode CanLearnMoveRequirement} options
+ */
+interface Options {
+  excludeLevelMoves?: boolean;
+  excludeTmMoves?: boolean;
+  excludeEggMoves?: boolean;
+  includeFainted?: boolean;
+  minNumberOfPokemon?: number;
+  invertQuery?: boolean;
+}
+
+/**
+ * Requires that a pokemon can learn a specific move/moveset.
+ */
+export class CanLearnMoveRequirement extends EncounterPokemonRequirement {
+  private readonly requiredMoves: Moves[];
+  private readonly excludeLevelMoves?: boolean;
+  private readonly excludeTmMoves?: boolean;
+  private readonly excludeEggMoves?: boolean;
+  private readonly includeFainted?: boolean;
+
+  constructor(requiredMoves: Moves | Moves[], options: Options = {}) {
+    super();
+    this.requiredMoves = Array.isArray(requiredMoves)
+      ? requiredMoves
+      : [requiredMoves];
+
+    const {
+      excludeLevelMoves,
+      excludeTmMoves,
+      excludeEggMoves,
+      includeFainted,
+      minNumberOfPokemon,
+      invertQuery,
+    } = options;
+
+    this.excludeLevelMoves = excludeLevelMoves ?? false;
+    this.excludeTmMoves = excludeTmMoves ?? false;
+    this.excludeEggMoves = excludeEggMoves ?? false;
+    this.includeFainted = includeFainted ?? false;
+    this.minNumberOfPokemon = minNumberOfPokemon ?? 1;
+    this.invertQuery = invertQuery;
+  }
+
+  override meetsRequirement(scene: BattleScene): boolean {
+    const partyPokemon = scene
+      .getParty()
+      .filter((pkm) =>
+        this.includeFainted ? pkm.isAllowed() : pkm.isAllowedInBattle()
+      );
+
+    if (isNullOrUndefined(partyPokemon) || this?.requiredMoves?.length < 0) {
+      return false;
+    }
+
+    return this.queryParty(partyPokemon).length >= this.minNumberOfPokemon;
+  }
+
+  override queryParty(partyPokemon: PlayerPokemon[]): PlayerPokemon[] {
+    if (!this.invertQuery) {
+      return partyPokemon.filter((pokemon) =>
+        // every required move should be included
+        this.requiredMoves.every((requiredMove) =>
+          this.getAllPokemonMoves(pokemon).includes(requiredMove)
+        )
+      );
+    } else {
+      return partyPokemon.filter(
+        (pokemon) =>
+          // none of the "required" moves should be included
+          !this.requiredMoves.some((requiredMove) =>
+            this.getAllPokemonMoves(pokemon).includes(requiredMove)
+          )
+      );
+    }
+  }
+
+  override getDialogueToken(
+    _scene: BattleScene,
+    _pokemon?: PlayerPokemon
+  ): [string, string] {
+    return ["requiredMoves", this.requiredMoves.join(", ")];
+  }
+
+  private getPokemonLevelMoves(pkm: PlayerPokemon): Moves[] {
+    return pkm.getLevelMoves().map(([_level, move]) => move);
+  }
+
+  private getAllPokemonMoves(pkm: PlayerPokemon): Moves[] {
+    const allPokemonMoves: Moves[] = [];
+
+    if (!this.excludeLevelMoves) {
+      allPokemonMoves.push(...this.getPokemonLevelMoves(pkm));
+    }
+
+    if (this.excludeTmMoves) {
+      allPokemonMoves.push(...pkm.compatibleTms);
+    }
+
+    if (this.excludeEggMoves) {
+      allPokemonMoves.push(...pkm.getEggMoves());
+    }
+
+    return allPokemonMoves;
+  }
+}