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* Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n * @format\n * @flow\n * @jsdoc\n */\n\n'use strict';\n\nimport RCTAsyncStorage from './RCTAsyncStorage';\n\nif (!RCTAsyncStorage) {\n throw new Error(`[@RNC/AsyncStorage]: NativeModule: AsyncStorage is null.\n\nTo fix this issue try these steps:\n\n • Run \\`react-native link @react-native-community/async-storage\\` in the project root.\n\n • Rebuild and restart the app.\n\n • Run the packager with \\`--reset-cache\\` flag.\n\n • If you are using CocoaPods on iOS, run \\`pod install\\` in the \\`ios\\` directory and then rebuild and re-run the app.\n\n • If this happens while testing with Jest, check out docs how to integrate AsyncStorage with it: https://react-native-community.github.io/async-storage/docs/advanced/jest\n\nIf none of these fix the issue, please open an issue on the Github repository: https://github.com/react-native-community/react-native-async-storage/issues \n`);\n}\n\ntype ReadOnlyArrayString = $ReadOnlyArray<string>;\n\ntype MultiGetCallbackFunction = (\n errors: ?$ReadOnlyArray<Error>,\n result: ?$ReadOnlyArray<ReadOnlyArrayString>,\n) => void;\n\ntype MultiRequest = {|\n keys: $ReadOnlyArray<string>,\n callback: ?MultiGetCallbackFunction,\n keyIndex: number,\n resolve: ?(result?: Promise<?$ReadOnlyArray<ReadOnlyArrayString>>) => void,\n reject: ?(error?: any) => void,\n|};\n\nfunction checkValidInput(usedKey: string, value: any) {\n const isValuePassed = arguments.length > 1;\n\n if (typeof usedKey !== 'string') {\n console.warn(\n `[AsyncStorage] Using ${typeof usedKey} type for key is not supported. This can lead to unexpected behavior/errors. Use string instead.\\nKey passed: ${usedKey}\\n`,\n );\n }\n\n if (isValuePassed && typeof value !== 'string') {\n if (value == null) {\n throw new Error(\n `[AsyncStorage] Passing null/undefined as value is not supported. If you want to remove value, Use .remove method instead.\\nPassed value: ${value}\\nPassed key: ${usedKey}\\n`,\n );\n } else {\n console.warn(\n `[AsyncStorage] The value for key \"${usedKey}\" is not a string. This can lead to unexpected behavior/errors. Consider stringifying it.\\nPassed value: ${value}\\nPassed key: ${usedKey}\\n`,\n );\n }\n }\n}\n\n/**\n * `AsyncStorage` is a simple, unencrypted, asynchronous, persistent, key-value\n * storage system that is global to the app. It should be used instead of\n * LocalStorage.\n *\n * See http://reactnative.dev/docs/asyncstorage.html\n */\nconst AsyncStorage = {\n _getRequests: ([]: Array<MultiRequest>),\n _getKeys: ([]: Array<string>),\n _immediate: (null: ?number),\n\n /**\n * Fetches an item for a `key` and invokes a callback upon completion.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#getitem\n */\n getItem: function(\n key: string,\n callback?: ?(error: ?Error, result: string | null) => void,\n ): Promise<string | null> {\n return new Promise((resolve, reject) => {\n checkValidInput(key);\n RCTAsyncStorage.multiGet([key], function(errors, result) {\n // Unpack result to get value from [[key,value]]\n const value = result && result[0] && result[0][1] ? result[0][1] : null;\n const errs = convertErrors(errors);\n callback && callback(errs && errs[0], value);\n if (errs) {\n reject(errs[0]);\n } else {\n resolve(value);\n }\n });\n });\n },\n\n /**\n * Sets the value for a `key` and invokes a callback upon completion.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#setitem\n */\n setItem: function(\n key: string,\n value: string,\n callback?: ?(error: ?Error) => void,\n ): Promise<null> {\n return new Promise((resolve, reject) => {\n checkValidInput(key, value);\n RCTAsyncStorage.multiSet([[key, value]], function(errors) {\n const errs = convertErrors(errors);\n callback && callback(errs && errs[0]);\n if (errs) {\n reject(errs[0]);\n } else {\n resolve(null);\n }\n });\n });\n },\n\n /**\n * Removes an item for a `key` and invokes a callback upon completion.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#removeitem\n */\n removeItem: function(\n key: string,\n callback?: ?(error: ?Error) => void,\n ): Promise<null> {\n return new Promise((resolve, reject) => {\n checkValidInput(key);\n RCTAsyncStorage.multiRemove([key], function(errors) {\n const errs = convertErrors(errors);\n callback && callback(errs && errs[0]);\n if (errs) {\n reject(errs[0]);\n } else {\n resolve(null);\n }\n });\n });\n },\n\n /**\n * Merges an existing `key` value with an input value, assuming both values\n * are stringified JSON.\n *\n * **NOTE:** This is not supported by all native implementations.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#mergeitem\n */\n mergeItem: function(\n key: string,\n value: string,\n callback?: ?(error: ?Error) => void,\n ): Promise<null> {\n return new Promise((resolve, reject) => {\n checkValidInput(key, value);\n RCTAsyncStorage.multiMerge([[key, value]], function(errors) {\n const errs = convertErrors(errors);\n callback && callback(errs && errs[0]);\n if (errs) {\n reject(errs[0]);\n } else {\n resolve(null);\n }\n });\n });\n },\n\n /**\n * Erases *all* `AsyncStorage` for all clients, libraries, etc. You probably\n * don't want to call this; use `removeItem` or `multiRemove` to clear only\n * your app's keys.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#clear\n */\n clear: function(callback?: ?(error: ?Error) => void): Promise<null> {\n return new Promise((resolve, reject) => {\n RCTAsyncStorage.clear(function(error) {\n const err = convertError(error);\n callback && callback(err);\n if (err) {\n reject(err);\n } else {\n resolve(null);\n }\n });\n });\n },\n\n /**\n * Gets *all* keys known to your app; for all callers, libraries, etc.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#getallkeys\n */\n getAllKeys: function(\n callback?: ?(error: ?Error, keys: ?ReadOnlyArrayString) => void,\n ): Promise<ReadOnlyArrayString> {\n return new Promise((resolve, reject) => {\n RCTAsyncStorage.getAllKeys(function(error, keys) {\n const err = convertError(error);\n callback && callback(err, keys);\n if (err) {\n reject(err);\n } else {\n resolve(keys);\n }\n });\n });\n },\n\n /**\n * The following batched functions are useful for executing a lot of\n * operations at once, allowing for native optimizations and provide the\n * convenience of a single callback after all operations are complete.\n *\n * These functions return arrays of errors, potentially one for every key.\n * For key-specific errors, the Error object will have a key property to\n * indicate which key caused the error.\n */\n\n /**\n * Flushes any pending requests using a single batch call to get the data.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#flushgetrequests\n * */\n flushGetRequests: function(): void {\n const getRequests = this._getRequests;\n const getKeys = this._getKeys;\n\n this._getRequests = [];\n this._getKeys = [];\n\n RCTAsyncStorage.multiGet(getKeys, function(errors, result) {\n // Even though the runtime complexity of this is theoretically worse vs if we used a map,\n // it's much, much faster in practice for the data sets we deal with (we avoid\n // allocating result pair arrays). This was heavily benchmarked.\n //\n // Is there a way to avoid using the map but fix the bug in this breaking test?\n // https://github.com/facebook/react-native/commit/8dd8ad76579d7feef34c014d387bf02065692264\n const map = {};\n result &&\n result.forEach(([key, value]) => {\n map[key] = value;\n return value;\n });\n const reqLength = getRequests.length;\n for (let i = 0; i < reqLength; i++) {\n const request = getRequests[i];\n const requestKeys = request.keys;\n const requestResult = requestKeys.map(key => [key, map[key]]);\n request.callback && request.callback(null, requestResult);\n request.resolve && request.resolve(requestResult);\n }\n });\n },\n\n /**\n * This allows you to batch the fetching of items given an array of `key`\n * inputs. Your callback will be invoked with an array of corresponding\n * key-value pairs found.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#multiget\n */\n multiGet: function(\n keys: Array<string>,\n callback?: ?MultiGetCallbackFunction,\n ): Promise<?$ReadOnlyArray<ReadOnlyArrayString>> {\n if (!this._immediate) {\n this._immediate = setImmediate(() => {\n this._immediate = null;\n this.flushGetRequests();\n });\n }\n\n const getRequest: MultiRequest = {\n keys: keys,\n callback: callback,\n // do we need this?\n keyIndex: this._getKeys.length,\n resolve: null,\n reject: null,\n };\n\n const promiseResult = new Promise((resolve, reject) => {\n getRequest.resolve = resolve;\n getRequest.reject = reject;\n });\n\n this._getRequests.push(getRequest);\n // avoid fetching duplicates\n keys.forEach(key => {\n if (this._getKeys.indexOf(key) === -1) {\n this._getKeys.push(key);\n }\n });\n\n return promiseResult;\n },\n\n /**\n * Use this as a batch operation for storing multiple key-value pairs. When\n * the operation completes you'll get a single callback with any errors.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#multiset\n */\n multiSet: function(\n keyValuePairs: Array<Array<string>>,\n callback?: ?(errors: ?$ReadOnlyArray<?Error>) => void,\n ): Promise<null> {\n return new Promise((resolve, reject) => {\n keyValuePairs.forEach(([key, value]) => {\n checkValidInput(key, value);\n });\n\n RCTAsyncStorage.multiSet(keyValuePairs, function(errors) {\n const error = convertErrors(errors);\n callback && callback(error);\n if (error) {\n reject(error);\n } else {\n resolve(null);\n }\n });\n });\n },\n\n /**\n * Call this to batch the deletion of all keys in the `keys` array.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#multiremove\n */\n multiRemove: function(\n keys: Array<string>,\n callback?: ?(errors: ?$ReadOnlyArray<?Error>) => void,\n ): Promise<null> {\n return new Promise((resolve, reject) => {\n keys.forEach(key => checkValidInput(key));\n\n RCTAsyncStorage.multiRemove(keys, function(errors) {\n const error = convertErrors(errors);\n callback && callback(error);\n if (error) {\n reject(error);\n } else {\n resolve(null);\n }\n });\n });\n },\n\n /**\n * Batch operation to merge in existing and new values for a given set of\n * keys. This assumes that the values are stringified JSON.\n *\n * **NOTE**: This is not supported by all native implementations.\n *\n * See http://reactnative.dev/docs/asyncstorage.html#multimerge\n */\n multiMerge: function(\n keyValuePairs: Array<Array<string>>,\n callback?: ?(errors: ?$ReadOnlyArray<?Error>) => void,\n ): Promise<null> {\n return new Promise((resolve, reject) => {\n RCTAsyncStorage.multiMerge(keyValuePairs, function(errors) {\n const error = convertErrors(errors);\n callback && callback(error);\n if (error) {\n reject(error);\n } else {\n resolve(null);\n }\n });\n });\n },\n};\n\n// Not all native implementations support merge.\nif (!RCTAsyncStorage.multiMerge) {\n delete AsyncStorage.mergeItem;\n delete AsyncStorage.multiMerge;\n}\n\nfunction convertErrors(errs): ?$ReadOnlyArray<?Error> {\n if (!errs || (Array.isArray(errs) && errs.length === 0)) {\n return null;\n }\n return (Array.isArray(errs) ? errs : [errs]).map(e => convertError(e));\n}\n\nfunction convertError(error): ?Error {\n if (!error) {\n return null;\n }\n const out = new Error(error.message);\n // $FlowFixMe: adding custom properties to error.\n out.key = error.key;\n return out;\n}\n\nexport default AsyncStorage;\n"]} |