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default class LocalSaveEncryptionKeyError extends Error {\n constructor(message: string, options?: ErrorOptions) {\n super(message, options);\n this.name = 'LocalSaveEncryptionKeyError';\n }\n}\n","export default class LocalSaveError extends Error {\n constructor(message: string, options?: ErrorOptions) {\n super(message, options);\n this.name = 'LocalSaveError';\n }\n}\n","export default class Logger {\n constructor() {\n throw new Error('This class cannot be instantiated.');\n }\n static log(message: string, ...args: unknown[]) {\n console.log(`[LocalSave | LOG] ${message}\\n`, ...args);\n }\n static warn(message: string, ...args: unknown[]) {\n console.warn(`[LocalSave | WARN] ${message}\\n`, ...args);\n }\n static error(message: string, ...args: unknown[]) {\n console.error(`[LocalSave | ERROR] ${message}\\n`, ...args);\n }\n static info(message: string, ...args: unknown[]) {\n console.info(`[LocalSave | INFO] ${message}\\n`, ...args);\n }\n static debug(message: string, ...args: unknown[]) {\n console.debug(`[LocalSave | DEBUG] ${message}\\n`, ...args);\n }\n}\n","/**\n * Validates the encryption key.\n * This function checks if the provided key is a string and has a length.\n *\n * @param key - The encryption key to validate.\n * @returns `true` if the key is defined.\n */\nexport function isEncryptionKeyDefined(key: string | undefined | null): key is string {\n return typeof key === 'string' && key.length > 0;\n}\n\n/**\n * Validates the encryption key.\n *\n * This function checks if the provided key has no whitespace and a valid length.\n * The valid lengths for the encryption key are 16, 24, or 32 characters.\n *\n * @param key - The encryption key to validate.\n * @returns `true` if the key has no whitespace and a valid length, otherwise `false`.\n */\nexport function isValidEncryptionKey(key: string): boolean {\n return key.length > 0 && !/\\s/.test(key) && [16, 24, 32].includes(key.length);\n}\n\n/**\n * Converts an ArrayBuffer to a Base64 encoded string.\n *\n * @internal\n *\n * @param buffer - The ArrayBuffer to convert.\n *\n * @returns The Base64 encoded string representation of the ArrayBuffer.\n */\nexport function arrayBufferToBase64(buffer: ArrayBuffer): string {\n let binary = '';\n const bytes = new Uint8Array(buffer);\n const len = bytes.byteLength;\n for (let i = 0; i < len; i++) {\n binary += String.fromCharCode(bytes[i]);\n }\n return window.btoa(binary);\n}\n\n/**\n * Converts a base64 encoded string to an ArrayBuffer.\n *\n * @internal\n *\n * @param base64 - The base64 encoded string to convert.\n *\n * @returns The resulting ArrayBuffer.\n */\nexport function base64ToArrayBuffer(base64: string): ArrayBuffer {\n const binary_string = window.atob(base64);\n const len = binary_string.length;\n const bytes = new Uint8Array(len);\n for (let i = 0; i < len; i++) {\n bytes[i] = binary_string.charCodeAt(i);\n }\n return bytes.buffer;\n}\n","import type { DBItem, DBItemEncryptedBase64, EncryptionKey } from '@local-save/types';\nimport LocalSaveEncryptionKeyError from '@local-save/utils/errors/LocalSaveEncryptionKeyError';\nimport LocalSaveError from '@local-save/utils/errors/LocalSaveError';\nimport Logger from '@local-save/utils/logger';\nimport {\n arrayBufferToBase64,\n base64ToArrayBuffer,\n isEncryptionKeyDefined,\n isValidEncryptionKey,\n} from '@local-save/utils/utils';\n\ninterface LocalSaveCryptoConfig {\n getEncryptionKey: () => EncryptionKey | undefined;\n isLoggingEnabled: () => boolean;\n}\n\n/**\n * Handles AES-GCM encryption/decryption concerns for LocalSave.\n *\n * - Lazily initializes text encoder/decoder.\n * - Caches imported CryptoKey while the source key string remains unchanged.\n * - Preserves LocalSave error behavior for key validation and decrypt failures.\n */\nexport class LocalSaveCrypto {\n private textEncoder?: TextEncoder;\n private textDecoder?: TextDecoder;\n private cachedCryptoKeyPromise?: Promise;\n private cachedCryptoKeySource?: EncryptionKey;\n\n private readonly getEncryptionKey: () => EncryptionKey | undefined;\n private readonly isLoggingEnabled: () => boolean;\n\n /**\n * Creates a crypto helper bound to runtime callbacks from LocalSave.\n *\n * @param config Runtime callbacks for key retrieval and logging state.\n */\n constructor(config: LocalSaveCryptoConfig) {\n this.getEncryptionKey = config.getEncryptionKey;\n this.isLoggingEnabled = config.isLoggingEnabled;\n }\n\n /**\n * Returns a lazily initialized TextEncoder instance.\n *\n * @internal\n * @returns {TextEncoder} A reusable TextEncoder instance for UTF-8 encoding.\n */\n private getTextEncoder(): TextEncoder {\n if (!this.textEncoder) {\n this.textEncoder = new TextEncoder();\n }\n return this.textEncoder;\n }\n\n /**\n * Returns a lazily initialized TextDecoder instance.\n *\n * @internal\n * @returns {TextDecoder} A reusable TextDecoder instance for UTF-8 decoding.\n */\n private getTextDecoder(): TextDecoder {\n if (!this.textDecoder) {\n this.textDecoder = new TextDecoder();\n }\n return this.textDecoder;\n }\n\n /**\n * Retrieves the encryption key as an imported CryptoKey object.\n *\n * @internal\n * @returns {Promise} A promise that resolves to a CryptoKey object.\n *\n * @throws {LocalSaveEncryptionKeyError} If the encryption key is not configured.\n * @throws {LocalSaveEncryptionKeyError} If the encryption key contains whitespace or has invalid length.\n */\n private async getEncryptKey(): Promise {\n const sourceKey = this.getEncryptionKey();\n if (!isEncryptionKeyDefined(sourceKey)) {\n throw new LocalSaveEncryptionKeyError(`Encryption key is not configured`);\n }\n if (!isValidEncryptionKey(sourceKey)) {\n throw new LocalSaveEncryptionKeyError(\n 'Encryption key should not contain spaces and should be of length 16, 24, or 32 characters',\n );\n }\n if (this.cachedCryptoKeyPromise && this.cachedCryptoKeySource === sourceKey) {\n return this.cachedCryptoKeyPromise;\n }\n\n const keyBytes = this.getTextEncoder().encode(sourceKey);\n const importPromise = crypto.subtle\n .importKey('raw', keyBytes, { name: 'AES-GCM' }, false, ['encrypt', 'decrypt'])\n .then((key) => {\n if (this.isLoggingEnabled()) {\n Logger.debug(`Encryption key retrieved successfully`, {\n keyLength: sourceKey.length,\n keyBytesLength: keyBytes.length,\n });\n }\n return key;\n })\n .catch((error) => {\n if (this.cachedCryptoKeyPromise === importPromise) {\n this.cachedCryptoKeyPromise = undefined;\n this.cachedCryptoKeySource = undefined;\n }\n throw error;\n });\n\n this.cachedCryptoKeySource = sourceKey;\n this.cachedCryptoKeyPromise = importPromise;\n\n return importPromise;\n }\n\n /**\n * Encrypts the provided data using AES-GCM.\n *\n * - Generates a random 12-byte IV for each encryption.\n * - Returns a base64 payload containing IV + ciphertext bytes.\n *\n * @param data The record to encrypt.\n * @returns {Promise} A promise that resolves to encrypted base64 payload.\n *\n * @throws {LocalSaveEncryptionKeyError} If encryption key is not configured.\n * @throws {LocalSaveError} If encryption fails.\n */\n async encryptData(data: DBItem): Promise {\n try {\n if (!isEncryptionKeyDefined(this.getEncryptionKey())) {\n throw new LocalSaveEncryptionKeyError(`Encryption key is not configured`);\n }\n const iv = window.crypto.getRandomValues(new Uint8Array(12));\n const generatedKey = await this.getEncryptKey();\n const dataBuffer = this.getTextEncoder().encode(JSON.stringify(data));\n const encryptedData = await window.crypto.subtle.encrypt(\n {\n name: 'AES-GCM',\n iv: iv,\n },\n generatedKey,\n dataBuffer,\n );\n const ivUint8 = new Uint8Array(iv);\n const encryptedDataUint8 = new Uint8Array(encryptedData);\n const concatenatedArray = new Uint8Array(ivUint8.byteLength + encryptedDataUint8.byteLength);\n concatenatedArray.set(ivUint8, 0);\n concatenatedArray.set(encryptedDataUint8, ivUint8.byteLength);\n const base64Data = arrayBufferToBase64(concatenatedArray.buffer);\n if (this.isLoggingEnabled()) {\n Logger.debug(`Data encrypted successfully`, {\n base64DataLength: base64Data.length,\n });\n }\n return base64Data;\n } catch (error) {\n if (this.isLoggingEnabled()) {\n Logger.error(`Data encryption failed`, error);\n }\n throw error;\n }\n }\n\n /**\n * Decrypts a base64 payload produced by LocalSave encryption format.\n *\n * @param encryptedBase64Data Data payload encoded as base64 string.\n * @returns {Promise} A promise that resolves to the decrypted DBItem object.\n *\n * @throws {LocalSaveEncryptionKeyError} If encryption key is not configured.\n * @throws {LocalSaveError} If decryption fails.\n */\n async decryptData(encryptedBase64Data: string): Promise {\n try {\n if (!isEncryptionKeyDefined(this.getEncryptionKey())) {\n throw new LocalSaveEncryptionKeyError(`Encryption key is not configured`);\n }\n const arrayBuffer = base64ToArrayBuffer(encryptedBase64Data);\n const iv = new Uint8Array(arrayBuffer, 0, 12);\n const generatedKey = await this.getEncryptKey();\n const encryptedData = new Uint8Array(arrayBuffer, 12);\n const decryptedBufferData = await window.crypto.subtle.decrypt(\n {\n name: 'AES-GCM',\n iv,\n },\n generatedKey,\n encryptedData,\n );\n const decryptedData = JSON.parse(this.getTextDecoder().decode(decryptedBufferData)) as DBItem;\n if (this.isLoggingEnabled()) {\n Logger.debug(`Data decrypted successfully`, {\n timestamp: decryptedData.timestamp,\n });\n }\n return decryptedData;\n } catch (error) {\n if (this.isLoggingEnabled()) {\n Logger.error(`Data decryption failed`, error);\n }\n throw new LocalSaveError(`Data decryption failed`, {\n cause: error instanceof Error ? error : undefined,\n });\n }\n }\n}\n","import type LocalSaveError from '@local-save/utils/errors/LocalSaveError';\n\n/**\n * Wraps an IndexedDB request with transaction completion tracking.\n * Ensures the promise resolves/rejects only after the transaction settles.\n *\n * @param options Request and transaction handlers to track.\n * @param options.request IndexedDB request being tracked.\n * @param options.transaction IndexedDB transaction containing the request.\n * @param options.onRequestError Maps request-level errors to LocalSaveError.\n * @param options.onRequestError.error Request error payload.\n * @param options.onTransactionError Maps transaction-level errors to LocalSaveError.\n * @param options.onTransactionError.error Transaction error payload.\n * @param options.onTransactionAbort Maps transaction aborts to LocalSaveError.\n * @param options.onTransactionAbort.error Transaction abort error payload.\n * @param options.onTransactionComplete Optional callback executed after successful transaction completion.\n *\n * @returns {Promise} A promise that resolves to `true` when the transaction completes successfully.\n *\n * @throws {LocalSaveError} Rejects when request, transaction error, or transaction abort handlers map failures.\n */\nexport function wrapRequestWithTransaction({\n request,\n transaction,\n onRequestError,\n onTransactionError,\n onTransactionAbort,\n onTransactionComplete,\n}: {\n request: IDBRequest;\n transaction: IDBTransaction;\n onRequestError: (error: DOMException | null) => LocalSaveError;\n onTransactionError: (error: DOMException | null) => LocalSaveError;\n onTransactionAbort: (error: DOMException | null) => LocalSaveError;\n onTransactionComplete?: () => void;\n}): Promise {\n return new Promise((resolve, reject) => {\n let settled = false;\n let requestError: LocalSaveError | undefined;\n\n const settleResolve = () => {\n if (settled) return;\n settled = true;\n resolve(true);\n };\n\n const settleReject = (error: LocalSaveError) => {\n if (settled) return;\n settled = true;\n reject(error);\n };\n\n request.addEventListener(\n 'error',\n () => {\n requestError = onRequestError(request.error);\n },\n { once: true },\n );\n\n transaction.addEventListener(\n 'complete',\n () => {\n if (settled) return;\n if (requestError) {\n settleReject(requestError);\n return;\n }\n onTransactionComplete?.();\n settleResolve();\n },\n { once: true },\n );\n\n transaction.addEventListener(\n 'error',\n () => {\n if (settled) return;\n settleReject(requestError ?? onTransactionError(transaction.error));\n },\n { once: true },\n );\n\n transaction.addEventListener(\n 'abort',\n () => {\n if (settled) return;\n settleReject(requestError ?? onTransactionAbort(transaction.error));\n },\n { once: true },\n );\n });\n}\n","export default class LocalSaveConfigError extends Error {\n constructor(message: string, options?: ErrorOptions) {\n super(message, options);\n this.name = 'LocalSaveConfigError';\n }\n}\n","import { LocalSaveCrypto } from '@local-save/internal/crypto';\nimport { wrapRequestWithTransaction } from '@local-save/internal/transactions';\nimport type {\n Category,\n Config,\n DBItem,\n DBItemEncryptedBase64,\n DBName,\n EncryptionKey,\n PositiveNumber,\n} from '@local-save/types';\nimport LocalSaveConfigError from '@local-save/utils/errors/LocalSaveConfigError';\nimport LocalSaveError from '@local-save/utils/errors/LocalSaveError';\nimport Logger from '@local-save/utils/logger';\nimport { isValidEncryptionKey } from '@local-save/utils/utils';\n\n/**\n * LocalSave provides a small IndexedDB-backed key-value API with optional AES-GCM encryption,\n * category-based separation, and utility operations like key listing, expiration, and teardown.\n */\nclass LocalSave {\n dbName: DBName = 'LocalSave';\n encryptionKey?: EncryptionKey;\n private crypto: LocalSaveCrypto;\n categories: Category[] = ['userData'];\n expiryThreshold: PositiveNumber = 30 * 24 * 60 * 60 * 1000;\n blockedTimeoutThreshold: PositiveNumber = 10 * 1000;\n clearOnDecryptError: boolean = true;\n printLogs: boolean = false;\n\n /**\n * Creates a LocalSave instance and applies configuration defaults.\n *\n * - Persists constructor options into instance fields used by all operations.\n * - Validates encryption key format when provided.\n * - Validates numeric thresholds to fail fast for invalid runtime behavior.\n *\n * @param config Optional runtime configuration object.\n * @param config.dbName Optional IndexedDB database name override.\n * @param config.encryptionKey Optional AES-GCM key (no whitespace, length 16, 24, or 32).\n * @param config.categories Optional list of object store categories to use.\n * @param config.expiryThreshold Optional default expiration window in milliseconds.\n * @param config.blockedTimeoutThreshold Optional timeout in milliseconds for blocked open/delete requests.\n * @param config.clearOnDecryptError Optional flag to clear a category when decrypt fails.\n * @param config.printLogs Optional flag to enable debug/error logging.\n *\n * @throws {LocalSaveConfigError} If encryption key contains whitespace or its length is invalid.\n * @throws {LocalSaveConfigError} If expiryThreshold is not a positive finite number.\n * @throws {LocalSaveConfigError} If blockedTimeoutThreshold is not a positive finite number.\n */\n constructor(config?: Config) {\n this.dbName = config?.dbName ?? this.dbName;\n this.encryptionKey = config?.encryptionKey;\n this.categories = config?.categories ?? this.categories;\n this.clearOnDecryptError = config?.clearOnDecryptError ?? this.clearOnDecryptError;\n this.expiryThreshold = config?.expiryThreshold ?? this.expiryThreshold;\n this.blockedTimeoutThreshold = config?.blockedTimeoutThreshold ?? this.blockedTimeoutThreshold;\n this.printLogs = config?.printLogs ?? this.printLogs;\n this.crypto = new LocalSaveCrypto({\n getEncryptionKey: () => this.encryptionKey,\n isLoggingEnabled: () => this.printLogs,\n });\n\n if (config?.encryptionKey !== undefined && !isValidEncryptionKey(config.encryptionKey)) {\n throw new LocalSaveConfigError(\n 'Encryption key should not contain spaces and should be of length 16, 24, or 32 characters',\n );\n } else if (\n typeof this.expiryThreshold !== 'number' ||\n !Number.isFinite(this.expiryThreshold) ||\n this.expiryThreshold <= 0\n ) {\n throw new LocalSaveConfigError('expiryThreshold should be a positive number');\n } else if (\n typeof this.blockedTimeoutThreshold !== 'number' ||\n !Number.isFinite(this.blockedTimeoutThreshold) ||\n this.blockedTimeoutThreshold <= 0\n ) {\n throw new LocalSaveConfigError('blockedTimeoutThreshold should be a positive number');\n }\n }\n\n /**\n * Opens a connection to the IndexedDB database.\n * It handles the database versioning and ensures that the required object stores are created if they do not exist.\n *\n * @internal\n *\n * @param version - The version of the database to open. Optional.\n *\n * @returns {Promise} A promise that resolves to the opened IDBDatabase instance.\n */\n private openDB(version?: number): Promise {\n return new Promise((resolve, reject) => {\n const openRequest = indexedDB.open(this.dbName, version);\n let settled = false;\n let blockedTimeout: ReturnType | undefined;\n\n const settleResolve = (db: IDBDatabase) => {\n if (settled) {\n db.close();\n return;\n }\n settled = true;\n if (blockedTimeout) {\n clearTimeout(blockedTimeout);\n }\n resolve(db);\n };\n\n const settleReject = (error: LocalSaveError) => {\n if (settled) return;\n settled = true;\n if (blockedTimeout) {\n clearTimeout(blockedTimeout);\n }\n reject(error);\n };\n\n openRequest.onupgradeneeded = () => {\n const db = openRequest.result;\n if (this.printLogs) {\n Logger.debug(`Database upgrade triggered`, {\n dbName: this.dbName,\n version: db.version,\n });\n }\n for (const category of this.categories) {\n if (!db.objectStoreNames.contains(category)) {\n if (this.printLogs) {\n Logger.debug(`Creating object store`, {\n category,\n });\n }\n db.createObjectStore(category);\n }\n }\n };\n openRequest.onsuccess = () => {\n const db = openRequest.result;\n db.onversionchange = () => {\n if (this.printLogs) {\n Logger.warn(`Closing stale database connection on version change [dbName:${this.dbName}]`);\n }\n db.close();\n };\n if (this.printLogs) {\n Logger.debug(`Database opened successfully`, {\n dbName: this.dbName,\n version: db.version,\n });\n }\n settleResolve(db);\n };\n openRequest.onerror = () => {\n if (this.printLogs) {\n Logger.error(`LocalSaveError opening database [dbName:${this.dbName}]`, openRequest.error);\n }\n settleReject(new LocalSaveError(openRequest.error?.message ?? 'Error opening database'));\n };\n openRequest.onblocked = () => {\n if (this.printLogs) {\n Logger.warn(\n `Opening database is currently blocked by an existing open connection. Waiting for ${this.blockedTimeoutThreshold} ms before timing out [dbName:${this.dbName}]`,\n );\n }\n if (blockedTimeout || settled) return;\n blockedTimeout = setTimeout(() => {\n settleReject(\n new LocalSaveError(\n `Opening database timed out after ${this.blockedTimeoutThreshold} ms because it is blocked by open connections`,\n ),\n );\n }, this.blockedTimeoutThreshold);\n };\n });\n }\n\n /**\n * Lists all object stores currently available in the configured database.\n *\n * @internal\n *\n * @returns {Promise} A promise that resolves to an array of object store names.\n */\n private async listStores(): Promise {\n const db = await this.openDB();\n try {\n const stores = Array.from(db.objectStoreNames);\n if (this.printLogs) {\n Logger.debug(`Object stores listed successfully`, {\n stores,\n });\n }\n return stores;\n } finally {\n db.close();\n }\n }\n\n /**\n * Retrieves an object store from the IndexedDB database.\n * It handles the transaction mode and ensures that the requested object store is returned.\n *\n * If the object store does not exist in the database and the category is valid, it will create a new version of the database with the object store.\n *\n * @internal\n *\n * @param category - The name of the object store to retrieve.\n * @param mode - The mode for the transaction (default is \"readonly\").\n *\n * @returns {Promise} A promise that resolves to the requested object store.\n *\n * @throws {LocalSaveError} Will throw an error if the object store does not exist in the database and the category is invalid\n */\n private async getStore(category: Category, mode: IDBTransactionMode = 'readonly'): Promise {\n let db = await this.openDB();\n if (!db.objectStoreNames.contains(category) && this.categories.includes(category)) {\n if (this.printLogs) {\n Logger.debug(\n `Requested object store not found in current database version.\\nTriggering database upgrade to create object store.`,\n {\n category,\n dbName: this.dbName,\n version: db.version,\n },\n );\n }\n const currVersion = db.version;\n db.close();\n db = await this.openDB(currVersion + 1);\n } else if (!db.objectStoreNames.contains(category)) {\n const dbVersion = db.version;\n db.close();\n throw new LocalSaveError(\n `Requested object store not found in current database version [category:${category} / dbName:${this.dbName} / version:${dbVersion}].`,\n );\n }\n let transaction: IDBTransaction;\n try {\n transaction = db.transaction(category, mode);\n } catch (error) {\n db.close();\n throw new LocalSaveError(error instanceof Error ? error.message : 'Error creating transaction');\n }\n transaction.oncomplete = () => {\n db.close();\n };\n transaction.onerror = () => {\n db.close();\n };\n transaction.onabort = () => {\n db.close();\n };\n const store = transaction.objectStore(category);\n if (this.printLogs) {\n Logger.debug(`Object store retrieved from database`, {\n category,\n mode,\n dbName: this.dbName,\n version: db.version,\n });\n }\n return store;\n }\n\n /**\n * Encrypts a DBItem using the configured encryption key.\n * Delegates to the extracted crypto helper.\n *\n * @internal\n *\n * @param data The item payload to encrypt.\n *\n * @returns {Promise} A promise that resolves to a base64 payload containing IV + ciphertext.\n *\n * @throws {LocalSaveEncryptionKeyError} If the encryption key is not configured or invalid.\n * @throws {LocalSaveError} If encryption fails.\n */\n private async encryptData(data: DBItem): Promise {\n return this.crypto.encryptData(data);\n }\n\n /**\n * Decrypts data using the configured encryption key.\n *\n * @param encryptedBase64Data The data to decrypt, as a string.\n * @returns {Promise} A promise that resolves to the decrypted data object.\n *\n * @throws {LocalSaveError} If decryption fails.\n */\n async decryptData(encryptedBase64Data: string): Promise {\n return this.crypto.decryptData(encryptedBase64Data);\n }\n\n /**\n * Stores data in the specified category with the given item key.\n * If encryption key is configured, the data is encrypted first before being stored.\n *\n * @param category The category under which the data should be stored.\n * @param itemKey The key to identify the stored data.\n * @param data The data to be stored.\n *\n * @returns {Promise} A promise that resolves to `true` if the operation was successful.\n *\n * @throws {LocalSaveError} Will reject the promise if an error occurs during the saving process.\n */\n async set(category: Category, itemKey: string, data: unknown): Promise {\n if (this.printLogs) {\n Logger.debug(`set() called to store data with following props`, {\n category,\n itemKey,\n });\n }\n let payload: DBItem | DBItemEncryptedBase64 = {\n timestamp: Date.now(),\n data,\n };\n try {\n if (this.encryptionKey) {\n payload = await this.encryptData(payload);\n }\n const store = await this.getStore(category, 'readwrite');\n return wrapRequestWithTransaction({\n request: store.put(payload, itemKey),\n transaction: store.transaction,\n onRequestError: (error) => {\n if (this.printLogs) {\n Logger.error(`LocalSaveError storing data [category:${category} / key:${itemKey}]`, error);\n }\n return new LocalSaveError(error?.message ?? 'Error storing data', {\n cause: error ?? undefined,\n });\n },\n onTransactionError: (error) => {\n if (this.printLogs) {\n Logger.error(\n `LocalSaveError during transaction commit while storing data [category:${category} / key:${itemKey}]`,\n error,\n );\n }\n return new LocalSaveError(error?.message ?? 'Error committing storage transaction', {\n cause: error ?? undefined,\n });\n },\n onTransactionAbort: (error: DOMException | null) => {\n if (this.printLogs) {\n Logger.warn(\n `Transaction aborted while storing data [category:${category} / key:${itemKey}]`,\n error,\n );\n }\n return new LocalSaveError(error?.message ?? 'Transaction aborted while storing data', {\n cause: error ?? undefined,\n });\n },\n onTransactionComplete: () => {\n if (this.printLogs) {\n Logger.debug(`Data stored successfully`, {\n category,\n itemKey,\n });\n }\n },\n });\n } catch (error) {\n if (this.printLogs) {\n Logger.error(`Data storing failed`, error);\n }\n throw error;\n }\n }\n\n /**\n * Retrieves an item from the specified category in the IndexedDB.\n * If the item is not found, the promise resolves to 'null'.\n * If an encryption key is configured, the data is decrypted before being returned.\n *\n * @param category The category from which to retrieve the item.\n * @param itemKey The key of the item to retrieve.\n *\n * @returns {Promise} A promise that resolves to the retrieved item or null if not found.\n *\n * @throws {LocalSaveError} Will reject the promise if an error occurs while decrypting the data. Depending on the 'clearOnDecryptError' configuration, all data for the category can be cleared.\n * @throws {LocalSaveError} Will reject the promise if an error occurs during the retrieval process.\n */\n async get(category: Category, itemKey: string): Promise {\n if (this.printLogs) {\n Logger.debug(`get() called to retrieve data with following props`, {\n category,\n itemKey,\n });\n }\n const store = await this.getStore(category);\n return new Promise((resolve, reject) => {\n const getRequest = store.get(itemKey);\n getRequest.onsuccess = async () => {\n let result = getRequest.result as DBItemEncryptedBase64 | DBItem | null;\n if (!result) {\n if (this.printLogs) {\n Logger.debug(`No data was found`, {\n category,\n itemKey,\n });\n }\n return resolve(null);\n }\n if (typeof result === 'string') {\n try {\n result = await this.decryptData(result);\n } catch (error) {\n if (this.printLogs) {\n Logger.error(`Failed to get data`, error);\n }\n if (this.clearOnDecryptError) {\n if (this.printLogs) {\n Logger.error(`Triggering clear for all data for category since decryption failed`);\n }\n try {\n await this.clear(category);\n } catch (clearError) {\n if (this.printLogs) {\n Logger.error(`Failed to clear data after decryption failure`, clearError);\n }\n return reject(\n new LocalSaveError('Data decryption failed and category clearing failed', {\n cause: clearError instanceof Error ? clearError : undefined,\n }),\n );\n }\n }\n return reject(\n new LocalSaveError(error instanceof Error ? error.message : 'Failed to decrypt data'),\n );\n }\n }\n if (this.printLogs) {\n Logger.debug(`Data retrieved successfully`, {\n category,\n itemKey,\n timestamp: result.timestamp,\n });\n }\n return resolve(result);\n };\n getRequest.onerror = () => {\n return reject(new LocalSaveError(getRequest.error?.message ?? 'Error getting data'));\n };\n });\n }\n\n /**\n * Lists all categories (object stores) currently available in the database.\n *\n * @returns {Promise} A promise that resolves to an array of category names.\n */\n async listCategories(): Promise {\n if (this.printLogs) {\n Logger.debug(`listCategories() called to list all categories`);\n }\n return this.listStores();\n }\n\n /**\n * Lists all item keys stored under the specified category.\n *\n * @param category The category from which item keys should be listed.\n *\n * @returns {Promise} A promise that resolves to an array of item keys.\n *\n * @throws {LocalSaveError} Will reject the promise if an error occurs while listing keys.\n */\n async listKeys(category: Category): Promise {\n if (this.printLogs) {\n Logger.debug(`listKeys() called to list all keys for category`, {\n category,\n });\n }\n const store = await this.getStore(category);\n return new Promise((resolve, reject) => {\n const keysRequest = store.getAllKeys();\n keysRequest.onsuccess = () => {\n const keys = keysRequest.result as string[];\n if (this.printLogs) {\n Logger.debug(`Keys listed successfully for category`, {\n category,\n keys,\n });\n }\n resolve(keys);\n };\n keysRequest.onerror = () => {\n if (this.printLogs) {\n Logger.error(`Error listing keys for category [category:${category}]`, keysRequest.error);\n }\n reject(new LocalSaveError(keysRequest.error?.message ?? 'Error listing keys'));\n };\n });\n }\n\n /**\n * Removes an entry from the specified category and the specific itemKey in the IndexedDB store.\n *\n * @param category The category from which the item should be removed.\n * @param itemKey The key of the item to be removed.\n *\n * @returns {Promise} A promise that resolves to `true` if the operation was successful.\n *\n * @throws {LocalSaveError} Will reject the promise if an error occurs during the removal process.\n */\n async remove(category: Category, itemKey: string): Promise {\n if (this.printLogs) {\n Logger.debug(`remove() called to remove data with following props`, {\n category,\n itemKey,\n });\n }\n const store = await this.getStore(category, 'readwrite');\n return wrapRequestWithTransaction({\n request: store.delete(itemKey),\n transaction: store.transaction,\n onRequestError: (error: DOMException | null) => {\n if (this.printLogs) {\n Logger.error(`Failed to remove data from [category:${category} / key:${itemKey}]`, error);\n }\n return new LocalSaveError(error?.message ?? 'Error removing data', {\n cause: error ?? undefined,\n });\n },\n onTransactionError: (error: DOMException | null) => {\n if (this.printLogs) {\n Logger.error(\n `LocalSaveError during transaction commit while removing data [category:${category} / key:${itemKey}]`,\n error,\n );\n }\n return new LocalSaveError(error?.message ?? 'Error committing removal transaction', {\n cause: error ?? undefined,\n });\n },\n onTransactionAbort: (error: DOMException | null) => {\n if (this.printLogs) {\n Logger.warn(\n `Transaction aborted while removing data [category:${category} / key:${itemKey}]`,\n error,\n );\n }\n return new LocalSaveError(error?.message ?? 'Transaction aborted while removing data', {\n cause: error ?? undefined,\n });\n },\n onTransactionComplete: () => {\n if (this.printLogs) {\n Logger.debug(`Data removed successfully`, {\n category,\n itemKey,\n });\n }\n },\n });\n }\n\n /**\n * Clears all entries in the specified category.\n *\n * @param category - The category to clear.\n *\n * @returns {Promise} A promise that resolves to `true` if the operation was successful.\n *\n * @throws {LocalSaveError} Will reject the promise if an error occurs during the clearing process.\n */\n async clear(category: Category): Promise {\n if (this.printLogs) {\n Logger.debug(`clear() called to store all data under '${category}' category`);\n }\n const store = await this.getStore(category, 'readwrite');\n return wrapRequestWithTransaction({\n request: store.clear(),\n transaction: store.transaction,\n onRequestError: (error) => {\n if (this.printLogs) {\n Logger.error(\n `LocalSaveError clearing data [category:${category} / dbName:${this.dbName} / version:${store.transaction.db.version}]`,\n error,\n );\n }\n return new LocalSaveError(error?.message ?? 'Error clearing data', {\n cause: error ?? undefined,\n });\n },\n onTransactionError: (error) => {\n if (this.printLogs) {\n Logger.error(\n `LocalSaveError during transaction commit while clearing data [category:${category} / dbName:${this.dbName} / version:${store.transaction.db.version}]`,\n error,\n );\n }\n return new LocalSaveError(error?.message ?? 'Error committing clear transaction', {\n cause: error ?? undefined,\n });\n },\n onTransactionAbort: (error: DOMException | null) => {\n if (this.printLogs) {\n Logger.warn(`Transaction aborted while clearing data [category:${category}]`, error);\n }\n return new LocalSaveError(error?.message ?? 'Transaction aborted while clearing data', {\n cause: error ?? undefined,\n });\n },\n onTransactionComplete: () => {\n if (this.printLogs) {\n Logger.debug(`Data cleared successfully`, {\n category,\n dbName: this.dbName,\n version: store.transaction.db.version,\n });\n }\n },\n });\n }\n\n /**\n * Expires data older than the specified threshold in milliseconds.\n *\n * For each category, this method performs a readonly cursor scan to identify candidate\n * records, decrypts encrypted entries to inspect their timestamps, and then deletes the\n * expired keys in a separate readwrite transaction.\n *\n * If decryption fails during expiration and `clearOnDecryptError` is enabled, the category\n * is cleared before the error is rethrown.\n *\n * @param {number} [thresholdMs=this.expiryThreshold] The threshold in milliseconds to use for expiring data.\n * Defaults to expiryThreshold from config if not provided.\n *\n * @returns {Promise} A promise that resolves to `true` if the operation was successful.\n *\n * @throws {LocalSaveError} - Throws an error if there is an issue scanning entries, decrypting data, or removing expired items.\n */\n async expire(thresholdMs: number = this.expiryThreshold): Promise {\n if (this.printLogs) {\n Logger.debug(`expire() called to expire data older than ${thresholdMs} ms`);\n }\n if (typeof thresholdMs !== 'number' || !Number.isFinite(thresholdMs) || thresholdMs <= 0) {\n throw new LocalSaveError('thresholdMs should be a positive number');\n }\n const checkDate = Date.now() - thresholdMs;\n for (const category of this.categories) {\n const store = await this.getStore(category);\n try {\n const keysToDelete: string[] = [];\n let scannedCount = 0;\n\n await new Promise((resolve, reject) => {\n const cursorRequest = store.openCursor();\n let settled = false;\n let scanFinished = false;\n let pendingDecryptions = 0;\n let decryptionError: LocalSaveError | undefined;\n\n const settleReject = (error: LocalSaveError) => {\n if (settled) return;\n settled = true;\n reject(error);\n };\n\n const maybeResolve = () => {\n if (settled) return;\n if (decryptionError) {\n settleReject(decryptionError);\n return;\n }\n if (scanFinished && pendingDecryptions === 0) {\n settled = true;\n resolve();\n }\n };\n\n cursorRequest.onsuccess = () => {\n if (settled || decryptionError) return;\n const cursor = cursorRequest.result;\n if (!cursor) {\n scanFinished = true;\n if (this.printLogs) {\n Logger.debug(`Entries scanned successfully for expiring data`, {\n category,\n entryCount: scannedCount,\n });\n }\n maybeResolve();\n return;\n }\n\n scannedCount += 1;\n if (typeof cursor.key === 'string') {\n const key = cursor.key;\n const value = cursor.value as DBItemEncryptedBase64 | DBItem;\n\n if (typeof value === 'string') {\n pendingDecryptions += 1;\n void this.decryptData(value)\n .then((item) => {\n if (item.timestamp < checkDate) {\n keysToDelete.push(key);\n }\n })\n .catch((error) => {\n if (this.printLogs) {\n Logger.error(`Failed to decrypt data while expiring`, error);\n }\n if (this.clearOnDecryptError) {\n if (this.printLogs) {\n Logger.error(\n `Triggering clear for all data for category since decryption failed during expire`,\n );\n }\n void this.clear(category);\n }\n if (!decryptionError) {\n decryptionError = new LocalSaveError(\n error instanceof Error ? error.message : 'Failed to decrypt data',\n );\n try {\n store.transaction.abort();\n } catch {\n // Ignore abort errors if the transaction is already finished.\n }\n }\n })\n .finally(() => {\n pendingDecryptions -= 1;\n maybeResolve();\n });\n } else if (value.timestamp < checkDate) {\n keysToDelete.push(key);\n }\n }\n\n if (!decryptionError) {\n cursor.continue();\n }\n };\n\n cursorRequest.onerror = () => {\n if (this.printLogs) {\n Logger.error(\n `LocalSaveError scanning entries for expiring data [category:${category}]`,\n cursorRequest.error,\n );\n }\n settleReject(new LocalSaveError(cursorRequest.error?.message ?? 'Error scanning entries'));\n };\n });\n\n if (keysToDelete.length === 0) {\n continue;\n }\n\n const writeStore = await this.getStore(category, 'readwrite');\n await new Promise((resolve, reject) => {\n let settled = false;\n\n const settleReject = (error: LocalSaveError) => {\n if (settled) return;\n settled = true;\n reject(error);\n };\n\n const settleTx = writeStore.transaction;\n\n settleTx.addEventListener('complete', () => {\n if (settled) return;\n settled = true;\n if (this.printLogs) {\n Logger.debug(`Expired data removed successfully`, {\n category,\n removedCount: keysToDelete.length,\n });\n }\n resolve();\n });\n\n settleTx.addEventListener('error', () => {\n if (this.printLogs) {\n Logger.error(\n `LocalSaveError during transaction commit while removing expired data [category:${category}]`,\n settleTx.error,\n );\n }\n settleReject(\n new LocalSaveError(settleTx.error?.message ?? 'Error committing removal transaction'),\n );\n });\n\n settleTx.addEventListener('abort', () => {\n if (this.printLogs) {\n Logger.warn(`Transaction aborted while removing expired data [category:${category}]`);\n }\n settleReject(new LocalSaveError('Transaction aborted while removing expired data'));\n });\n\n for (const key of keysToDelete) {\n const deleteRequest = writeStore.delete(key);\n deleteRequest.onerror = () => {\n if (this.printLogs) {\n Logger.error(\n `LocalSaveError removing expired data [category:${category} / key:${key}]`,\n deleteRequest.error,\n );\n }\n };\n }\n });\n } catch (error) {\n if (this.printLogs) {\n Logger.error(`Expiring data older than '${thresholdMs}' ms failed`, error);\n }\n throw error;\n }\n }\n return true;\n }\n\n /**\n * Asynchronously destroys the database by deleting it from IndexedDB.\n *\n * @returns {Promise} A promise that resolves to `true` if the operation was successful.\n *\n * @throws {LocalSaveError} Will reject the promise if an error occurs during the deletion process.\n */\n async destroy(): Promise {\n if (this.printLogs) {\n Logger.debug(`destroy() called to wipe all data under all categories`);\n }\n return new Promise((resolve, reject) => {\n const deleteRequest = indexedDB.deleteDatabase(this.dbName);\n let settled = false;\n let blockedTimeout: ReturnType | undefined;\n\n const settleResolve = () => {\n if (settled) return;\n settled = true;\n if (blockedTimeout) {\n clearTimeout(blockedTimeout);\n }\n resolve(true);\n };\n\n const settleReject = (error: LocalSaveError) => {\n if (settled) return;\n settled = true;\n if (blockedTimeout) {\n clearTimeout(blockedTimeout);\n }\n reject(error);\n };\n\n deleteRequest.onsuccess = () => {\n if (this.printLogs) {\n Logger.debug(`Database deleted successfully`, {\n dbName: this.dbName,\n });\n }\n settleResolve();\n };\n deleteRequest.onerror = () => {\n if (this.printLogs) {\n Logger.error(`Error deleting database [dbName:${this.dbName}]`);\n }\n settleReject(new LocalSaveError(deleteRequest.error?.message ?? 'Error deleting database'));\n };\n deleteRequest.onblocked = () => {\n if (this.printLogs) {\n Logger.warn(\n `Deleting database is currently blocked by an open connection. Waiting for ${this.blockedTimeoutThreshold} ms before timing out [dbName:${this.dbName}]`,\n );\n }\n if (blockedTimeout || settled) return;\n blockedTimeout = setTimeout(() => {\n settleReject(\n new LocalSaveError(\n `Deleting database timed out after ${this.blockedTimeoutThreshold} ms because it is blocked by open connections`,\n ),\n );\n }, this.blockedTimeoutThreshold);\n };\n });\n }\n}\nexport type { Category, Config, DBItem, DBItemEncryptedBase64, DBName, EncryptionKey, PositiveNumber };\nexport default LocalSave;\n"]}