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May 21, 2019 16:57
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A Storage class for the MongoDB Stitch React Native SDK
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| /** | |
| * Copyright 2018-present MongoDB, Inc. | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| */ | |
| import AsyncStorage from '@react-native-community/async-storage'; | |
| const stitchPrefixKey = "__stitch.client"; | |
| /** | |
| * @hidden | |
| * A wrapper over React Native's AsyncStorage that allows synchronous | |
| * reads and writes to and from a cache. | |
| */ | |
| export default class RNCommunityAsyncStorage { | |
| cachedStorage = {}; | |
| constructor(suiteName) {} | |
| /** | |
| * Refreshes the cached storage by loading all keys and values from the | |
| * asynchronous storage abstraction. | |
| */ | |
| refreshCache() { | |
| return AsyncStorage.getAllKeys() | |
| .then(keys => AsyncStorage.multiGet(keys)) | |
| .then(values => { | |
| this.cachedStorage = {}; | |
| values.forEach(element => { | |
| const key = element[0]; | |
| const value = element[1]; | |
| this.cachedStorage[key] = value; | |
| }); | |
| }) | |
| } | |
| /** | |
| * Gets a stored value from the cache. | |
| * @param key | |
| */ | |
| get(key) { | |
| return this.cachedStorage[this.getKey(key)]; | |
| } | |
| /** | |
| * Saves a value to the cache, and saves the value to async storage. Does not | |
| * block, and completion of the async save is neither checked nor guaranteed. | |
| */ | |
| set(key, value) { | |
| this.cachedStorage[this.getKey(key)] = value; | |
| AsyncStorage.setItem(this.getKey(key), value); | |
| } | |
| /** | |
| * Deletes a value from the cache, and removes the value from async storage. | |
| * Does not block, and completion of the async removal is neither checked nor | |
| * guaranteed. | |
| */ | |
| remove(key) { | |
| delete this.cachedStorage[this.getKey(key)]; | |
| AsyncStorage.removeItem(this.getKey(key)); | |
| } | |
| getKey(forKey) { | |
| return `${stitchPrefixKey}.${this.suiteName}.${forKey}`; | |
| } | |
| } |
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