102 lines
3.0 KiB
JavaScript
102 lines
3.0 KiB
JavaScript
import { DB_VERSION_CURRENT } from './constants'
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import { addKnownInstance, deleteKnownInstance } from './knownInstances'
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import { migrations } from './migrations'
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import { clearAllCaches } from './cache'
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import lifecycle from 'page-lifecycle/dist/lifecycle.mjs'
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const openReqs = {}
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const databaseCache = {}
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function createDatabase (instanceName) {
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return new Promise((resolve, reject) => {
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let req = indexedDB.open(instanceName, DB_VERSION_CURRENT.version)
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openReqs[instanceName] = req
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req.onerror = reject
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req.onblocked = () => {
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console.error('idb blocked')
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}
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req.onupgradeneeded = (e) => {
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let db = req.result
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let tx = e.currentTarget.transaction
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let migrationsToDo = migrations.filter(({ version }) => e.oldVersion < version)
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function doNextMigration () {
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if (!migrationsToDo.length) {
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return
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}
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let { migration } = migrationsToDo.shift()
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migration(db, tx, doNextMigration)
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}
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doNextMigration()
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}
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req.onsuccess = () => resolve(req.result)
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})
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}
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export async function getDatabase (instanceName) {
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if (!instanceName) {
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throw new Error('instanceName is undefined in getDatabase()')
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}
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if (!databaseCache[instanceName]) {
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databaseCache[instanceName] = await createDatabase(instanceName)
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await addKnownInstance(instanceName)
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}
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return databaseCache[instanceName]
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}
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export async function dbPromise (db, storeName, readOnlyOrReadWrite, cb) {
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return new Promise((resolve, reject) => {
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const tx = db.transaction(storeName, readOnlyOrReadWrite)
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let store = typeof storeName === 'string'
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? tx.objectStore(storeName)
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: storeName.map(name => tx.objectStore(name))
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let res
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cb(store, (result) => {
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res = result
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})
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tx.oncomplete = () => resolve(res)
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tx.onerror = () => reject(tx.error)
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})
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}
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export function deleteDatabase (instanceName) {
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return new Promise((resolve, reject) => {
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// close any open requests
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let openReq = openReqs[instanceName]
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if (openReq && openReq.result) {
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openReq.result.close()
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}
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delete openReqs[instanceName]
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delete databaseCache[instanceName]
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let req = indexedDB.deleteDatabase(instanceName)
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req.onsuccess = () => resolve()
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req.onerror = () => reject(req.error)
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req.onblocked = () => console.error(`database ${instanceName} blocked`)
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}).then(() => deleteKnownInstance(instanceName))
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.then(() => clearAllCaches(instanceName))
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}
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export function closeDatabase (instanceName) {
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// close any open requests
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let openReq = openReqs[instanceName]
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if (openReq && openReq.result) {
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openReq.result.close()
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}
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delete openReqs[instanceName]
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delete databaseCache[instanceName]
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clearAllCaches(instanceName)
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}
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if (process.browser) {
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lifecycle.addEventListener('statechange', event => {
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if (event.newState === 'frozen') { // page is frozen, close IDB connections
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Object.keys(openReqs).forEach(instanceName => {
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closeDatabase(instanceName)
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console.log('closed instance DBs')
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})
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}
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})
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}
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