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import { target } from './env'
// If we can, we use the browser extension API to store data
// it's async though, so we synchronize changes from an intermediate
// storageData object
const useStorage = typeof target.chrome !== 'undefined' && typeof target.chrome.storage !== 'undefined'
let storageData = null
export function initStorage(): Promise<void> {
return new Promise((resolve) => {
if (useStorage) {
target.chrome.storage.local.get(null, (result) => {
storageData = result
resolve()
})
}
else {
storageData = {}
resolve()
}
})
}
export function getStorage(key: string, defaultValue: any = null) {
checkStorage()
if (useStorage) {
return getDefaultValue(storageData[key], defaultValue)
}
else {
try {
return getDefaultValue(JSON.parse(localStorage.getItem(key)), defaultValue)
}
catch (e) {}
}
}
export function setStorage(key: string, val: any) {
checkStorage()
if (useStorage) {
storageData[key] = val
target.chrome.storage.local.set({ [key]: val })
}
else {
try {
localStorage.setItem(key, JSON.stringify(val))
}
catch (e) {}
}
}
export function removeStorage(key: string) {
checkStorage()
if (useStorage) {
delete storageData[key]
target.chrome.storage.local.remove([key])
}
else {
try {
localStorage.removeItem(key)
}
catch (e) {}
}
}
export function clearStorage() {
checkStorage()
if (useStorage) {
storageData = {}
target.chrome.storage.local.clear()
}
else {
try {
localStorage.clear()
}
catch (e) {}
}
}
function checkStorage() {
if (!storageData) {
throw new Error('Storage wasn\'t initialized with \'init()\'')
}
}
function getDefaultValue(value, defaultValue) {
if (value == null) {
return defaultValue
}
return value
}
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