Function getIndexedDBState

src/importer/storage.ts:8–43

(
  sheetDefinitions: SheetDefinition[],
  customKey?: string | null
)

const STORE_NAME = 'state';

export async function getIndexedDBState(
  sheetDefinitions: SheetDefinition[],
  customKey?: string | null
): Promise<ImporterState | null> {
  return new Promise((resolve, reject) => {
    const key = stateKey(sheetDefinitions, customKey);
    const request = indexedDB.open(DB_NAME, DB_VERSION);
    request.onerror = () => reject(request.error);
    request.onsuccess = () => {
      const db = request.result;
      const transaction = db.transaction(STORE_NAME, 'readonly');
      const store = transaction.objectStore(STORE_NAME);
      const getRequest = store.get(key);
      getRequest.onerror = () => resolve(null);
      getRequest.onsuccess = () => {
        try {
          const result = getRequest.result;
          result.sheetDefinitions = sheetDefinitions;
          resolve(result);
        } catch (error) {
          resolve(null);
        }
      };
    };

    request.onupgradeneeded = (event) => {
      const db = (event.target as IDBOpenDBRequest).result;
      if (db.objectStoreNames.contains(STORE_NAME)) {
        db.deleteObjectStore(STORE_NAME);
      }

      // Create fresh store
      db.createObjectStore(STORE_NAME);
    };
  });
}

export async function setIndexedDBState(
  state: ImporterState,