electron/lib/renderer/extensions/storage.js

88 lines
1.9 KiB
JavaScript

const getStorage = (storageType) => {
const data = window.localStorage.getItem(`__chrome.storage.${storageType}__`)
if (data != null) {
return JSON.parse(data)
} else {
return {}
}
}
const setStorage = (storageType, storage) => {
const json = JSON.stringify(storage)
window.localStorage.setItem(`__chrome.storage.${storageType}__`, json)
}
const scheduleCallback = (items, callback) => {
setTimeout(function () {
callback(items)
})
}
const getStorageManager = (storageType) => {
return {
get (keys, callback) {
const storage = getStorage(storageType)
if (keys == null) return scheduleCallback(storage, callback)
let defaults = {}
switch (typeof keys) {
case 'string':
keys = [keys]
break
case 'object':
if (!Array.isArray(keys)) {
defaults = keys
keys = Object.keys(keys)
}
break
}
if (keys.length === 0) return scheduleCallback({}, callback)
let items = {}
keys.forEach(function (key) {
var value = storage[key]
if (value == null) value = defaults[key]
items[key] = value
})
scheduleCallback(items, callback)
},
set (items, callback) {
const storage = getStorage(storageType)
Object.keys(items).forEach(function (name) {
storage[name] = items[name]
})
setStorage(storageType, storage)
setTimeout(callback)
},
remove (keys, callback) {
const storage = getStorage(storageType)
if (!Array.isArray(keys)) {
keys = [keys]
}
keys.forEach(function (key) {
delete storage[key]
})
setStorage(storageType, storage)
setTimeout(callback)
},
clear (callback) {
setStorage(storageType, {})
setTimeout(callback)
}
}
}
module.exports = {
sync: getStorageManager('sync'),
local: getStorageManager('local')
}