pinafore/routes/_utils/database/shared.js

40 lines
1.1 KiB
JavaScript

import keyval from "idb-keyval"
const databaseCache = {}
export const OBJECT_STORE = 'statuses'
export function createDbName(instanceName, timeline) {
return `${OBJECT_STORE}_${instanceName}_${timeline}`
}
export function getDatabase(instanceName, timeline) {
const key = `${instanceName}_${timeline}`
if (databaseCache[key]) {
return Promise.resolve(databaseCache[key])
}
let dbName = createDbName(instanceName, timeline)
keyval.get('known_dbs').then(knownDbs => {
knownDbs = knownDbs || {}
knownDbs[dbName] = [instanceName, timeline]
keyval.set('known_dbs', knownDbs)
})
databaseCache[key] = new Promise((resolve, reject) => {
let req = indexedDB.open(dbName, 1)
req.onerror = reject
req.onblocked = () => {
console.log('idb blocked')
}
req.onupgradeneeded = () => {
let db = req.result;
let oStore = db.createObjectStore(OBJECT_STORE, {
keyPath: 'id'
})
oStore.createIndex('pinafore_id_as_negative_big_int', 'pinafore_id_as_negative_big_int')
}
req.onsuccess = () => resolve(req.result)
})
return databaseCache[key]
}