feat: port scenario action effects

packages/logic/src/scenario/scenarioEffect.ts

@@ -0,0 +1,31 @@
+export const SCENARIO_EFFECT_KEYS = [
+    'event_UnlimitedDefenceThresholdChange',
+    'event_StrongAttacker',
+    'event_MoreEffect',
+] as const;
+
+export type ScenarioEffectKey = (typeof SCENARIO_EFFECT_KEYS)[number];
+
+const DEFENCE_TRAIN_PENALTY_WAIVER_EFFECTS = new Set<ScenarioEffectKey>([
+    'event_UnlimitedDefenceThresholdChange',
+    'event_StrongAttacker',
+    'event_MoreEffect',
+]);
+
+export const isScenarioEffectKey = (value: string): value is ScenarioEffectKey =>
+    SCENARIO_EFFECT_KEYS.includes(value as ScenarioEffectKey);
+
+export const normalizeScenarioEffect = (value: unknown): ScenarioEffectKey | null => {
+    if (value === undefined || value === null || value === '' || value === 'None') {
+        return null;
+    }
+    if (typeof value === 'string' && isScenarioEffectKey(value)) {
+        return value;
+    }
+    throw new Error(`Unknown scenario effect: ${String(value)}`);
+};
+
+export const isDefenceTrainPenaltyWaivedByScenarioEffect = (value: string | null | undefined): boolean => {
+    const effect = normalizeScenarioEffect(value);
+    return effect !== null && DEFENCE_TRAIN_PENALTY_WAIVER_EFFECTS.has(effect);
+};