일목균형표 수정

frontend/src/utils/virtualTargetStrategy.ts

@@ -0,0 +1,55 @@
+import type { VirtualTargetItem } from './virtualTradingStorage';
+
+/** 종목 전략 셀렉트 — 기본(전역) 전략 옵션 값 */
+export const VIRTUAL_DEFAULT_STRATEGY_VALUE = '__default__';
+
+/** 종목에 전략이 지정되지 않았으면 전역(기본) 전략 ID */
+export function resolveVirtualTargetStrategyId(
+  target: Pick<VirtualTargetItem, 'strategyId'>,
+  globalStrategyId: number | null,
+): number | null {
+  if (target.strategyId != null) return target.strategyId;
+  return globalStrategyId;
+}
+
+export function usesDefaultStrategy(target: Pick<VirtualTargetItem, 'strategyId'>): boolean {
+  return target.strategyId == null;
+}
+
+export function targetStrategySelectValue(target: Pick<VirtualTargetItem, 'strategyId'>): string {
+  return target.strategyId != null ? String(target.strategyId) : VIRTUAL_DEFAULT_STRATEGY_VALUE;
+}
+
+export function parseTargetStrategySelectValue(value: string): number | null {
+  if (!value || value === VIRTUAL_DEFAULT_STRATEGY_VALUE) return null;
+  const n = Number(value);
+  return Number.isFinite(n) ? n : null;
+}
+
+export function defaultStrategyOptionLabel(
+  globalStrategyId: number | null,
+  strategies: Array<{ id?: number; name?: string }>,
+): string {
+  if (globalStrategyId == null) return '기본 전략 (미설정)';
+  const name = strategies.find(s => s.id === globalStrategyId)?.name;
+  return name ? `기본 전략 (${name})` : '기본 전략';
+}
+
+/**
+ * 예전에 전역 전략 ID가 종목에 복사 저장된 항목 → null(기본 전략 따름)로 정규화
+ */
+export function coalesceTargetsToDefaultStrategy(
+  targets: VirtualTargetItem[],
+  globalStrategyId: number | null,
+): VirtualTargetItem[] {
+  if (globalStrategyId == null) return targets;
+  let changed = false;
+  const next = targets.map(t => {
+    if (t.strategyId != null && t.strategyId === globalStrategyId) {
+      changed = true;
+      return { ...t, strategyId: null };
+    }
+    return t;
+  });
+  return changed ? next : targets;
+}