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metamask-extension/app/scripts/lib/local-store.js
Mark Stacey 3732c5f71e
Add JSDoc ESLint rules (#12112)
ESLint rules have been added to enforce our JSDoc conventions. These
rules were introduced by updating `@metamask/eslint-config` to v9.

Some of the rules have been disabled because the effort to fix all lint
errors was too high. It might be easiest to enable these rules one
directory at a time, or one rule at a time.

Most of the changes in this PR were a result of running
`yarn lint:fix`. There were a handful of manual changes that seemed
obvious and simple to make. Anything beyond that and the rule was left
disabled.
2022-01-07 12:27:33 -03:30

95 lines
2.0 KiB
JavaScript

import extension from 'extensionizer';
import log from 'loglevel';
import { checkForError } from './util';
/**
* A wrapper around the extension's storage local API
*/
export default class ExtensionStore {
constructor() {
this.isSupported = Boolean(extension.storage.local);
if (!this.isSupported) {
log.error('Storage local API not available.');
}
}
/**
* Returns all of the keys currently saved
*
* @returns {Promise<*>}
*/
async get() {
if (!this.isSupported) {
return undefined;
}
const result = await this._get();
// extension.storage.local always returns an obj
// if the object is empty, treat it as undefined
if (isEmpty(result)) {
return undefined;
}
return result;
}
/**
* Sets the key in local state
*
* @param {Object} state - The state to set
* @returns {Promise<void>}
*/
async set(state) {
return this._set(state);
}
/**
* Returns all of the keys currently saved
*
* @private
* @returns {Object} the key-value map from local storage
*/
_get() {
const { local } = extension.storage;
return new Promise((resolve, reject) => {
local.get(null, (/** @type {any} */ result) => {
const err = checkForError();
if (err) {
reject(err);
} else {
resolve(result);
}
});
});
}
/**
* Sets the key in local state
*
* @param {Object} obj - The key to set
* @returns {Promise<void>}
* @private
*/
_set(obj) {
const { local } = extension.storage;
return new Promise((resolve, reject) => {
local.set(obj, () => {
const err = checkForError();
if (err) {
reject(err);
} else {
resolve();
}
});
});
}
}
/**
* Returns whether or not the given object contains no keys
*
* @param {Object} obj - The object to check
* @returns {boolean}
*/
function isEmpty(obj) {
return Object.keys(obj).length === 0;
}