28 lines
779 B
JavaScript
28 lines
779 B
JavaScript
import { addKnownDb } from './knownDbs'
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import { openReqs, databaseCache } from './cache'
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export const META_STORE = 'meta'
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export function getMetaDatabase(instanceName) {
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const dbName = `${instanceName}_${META_STORE}`
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if (databaseCache[dbName]) {
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return Promise.resolve(databaseCache[dbName])
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}
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addKnownDb(instanceName, 'meta', dbName)
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databaseCache[dbName] = new Promise((resolve, reject) => {
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let req = indexedDB.open(dbName, 1)
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openReqs[dbName] = req
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req.onerror = reject
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req.onblocked = () => {
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console.log('idb blocked')
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}
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req.onupgradeneeded = () => {
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let db = req.result;
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db.createObjectStore(META_STORE, {keyPath: 'key'})
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}
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req.onsuccess = () => resolve(req.result)
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})
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return databaseCache[dbName]
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} |