전략편집기 템플릿 저장 기능 추가

frontend/src/utils/strategyTemplateStorage.ts

@@ -0,0 +1,66 @@
+/** 전략편집기 — 사용자 저장 템플릿 (DB ui_preferences) */
+import type { LogicNode } from './strategyTypes';
+import type { EditorConditionState } from './strategyConditionSerde';
+import { getUiPreferences, patchUiPreferences } from './uiPreferencesDb';
+
+export type UserStrategyTemplate = {
+  id: string;
+  label: string;
+  description?: string;
+  signal: 'buy' | 'sell';
+  editorState: EditorConditionState;
+  orphans: LogicNode[];
+  createdAt: number;
+};
+
+function cloneJson<T>(value: T): T {
+  return JSON.parse(JSON.stringify(value)) as T;
+}
+
+export function createUserTemplateId(): string {
+  return `tmpl-${Date.now()}-${Math.random().toString(36).slice(2, 9)}`;
+}
+
+function parseStored(raw: unknown): UserStrategyTemplate[] {
+  if (!Array.isArray(raw)) return [];
+  return raw.filter(
+    (t): t is UserStrategyTemplate =>
+      t != null
+      && typeof t === 'object'
+      && typeof (t as UserStrategyTemplate).id === 'string'
+      && typeof (t as UserStrategyTemplate).label === 'string'
+      && ((t as UserStrategyTemplate).signal === 'buy' || (t as UserStrategyTemplate).signal === 'sell')
+      && typeof (t as UserStrategyTemplate).editorState === 'object'
+      && Array.isArray((t as UserStrategyTemplate).orphans),
+  );
+}
+
+export function loadUserStrategyTemplates(): UserStrategyTemplate[] {
+  const raw = getUiPreferences().strategyEditor?.userTemplates;
+  return parseStored(raw);
+}
+
+export function saveUserStrategyTemplates(templates: UserStrategyTemplate[]): void {
+  patchUiPreferences({ strategyEditor: { userTemplates: templates } });
+}
+
+export function addUserStrategyTemplate(
+  input: Omit<UserStrategyTemplate, 'id' | 'createdAt'>,
+): UserStrategyTemplate {
+  const next: UserStrategyTemplate = {
+    ...input,
+    id: createUserTemplateId(),
+    editorState: cloneJson(input.editorState),
+    orphans: cloneJson(input.orphans),
+    createdAt: Date.now(),
+  };
+  const templates = [...loadUserStrategyTemplates(), next];
+  saveUserStrategyTemplates(templates);
+  return next;
+}
+
+export function deleteUserStrategyTemplate(id: string): UserStrategyTemplate[] {
+  const templates = loadUserStrategyTemplates().filter(t => t.id !== id);
+  saveUserStrategyTemplates(templates);
+  return templates;
+}