pinafore/routes/_database/databaseLifecycle.js

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import {
META_STORE,
STATUS_TIMELINES_STORE,
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STATUSES_STORE,
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ACCOUNTS_STORE,
RELATIONSHIPS_STORE,
NOTIFICATIONS_STORE,
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NOTIFICATION_TIMELINES_STORE,
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PINNED_STATUSES_STORE,
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TIMESTAMP,
REBLOG_ID,
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THREADS_STORE,
STATUS_ID
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} from './constants'
import forEach from 'lodash/forEach'
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const openReqs = {}
const databaseCache = {}
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const DB_VERSION = 9
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export 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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if (databaseCache[instanceName]) {
return Promise.resolve(databaseCache[instanceName])
}
databaseCache[instanceName] = new Promise((resolve, reject) => {
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let req = indexedDB.open(instanceName, DB_VERSION)
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openReqs[instanceName] = req
req.onerror = reject
req.onblocked = () => {
console.log('idb blocked')
}
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req.onupgradeneeded = (e) => {
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let db = req.result
function createObjectStore (name, init, indexes) {
let store = init
? db.createObjectStore(name, init)
: db.createObjectStore(name)
if (indexes) {
forEach(indexes, (indexValue, indexKey) => {
store.createIndex(indexKey, indexValue)
})
}
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}
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if (e.oldVersion < DB_VERSION) {
createObjectStore(STATUSES_STORE, {keyPath: 'id'}, {
[TIMESTAMP]: TIMESTAMP,
[REBLOG_ID]: REBLOG_ID
})
createObjectStore(STATUS_TIMELINES_STORE, null, {
'statusId': ''
})
createObjectStore(NOTIFICATIONS_STORE, {keyPath: 'id'}, {
[TIMESTAMP]: TIMESTAMP,
[STATUS_ID]: STATUS_ID
})
createObjectStore(NOTIFICATION_TIMELINES_STORE, null, {
'notificationId': ''
})
createObjectStore(ACCOUNTS_STORE, {keyPath: 'id'}, {
[TIMESTAMP]: TIMESTAMP
})
createObjectStore(RELATIONSHIPS_STORE, {keyPath: 'id'}, {
[TIMESTAMP]: TIMESTAMP
})
createObjectStore(THREADS_STORE, null, {
'statusId': ''
})
createObjectStore(PINNED_STATUSES_STORE, null, {
'statusId': ''
})
createObjectStore(META_STORE)
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}
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}
req.onsuccess = () => resolve(req.result)
})
return databaseCache[instanceName]
}
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export async function dbPromise (db, storeName, readOnlyOrReadWrite, cb) {
return new Promise((resolve, reject) => {
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const tx = db.transaction(storeName, readOnlyOrReadWrite)
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let store = typeof storeName === 'string'
? tx.objectStore(storeName)
: storeName.map(name => tx.objectStore(name))
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let res
cb(store, (result) => {
res = result
})
tx.oncomplete = () => resolve(res)
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tx.onerror = () => reject(tx.error)
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})
}
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export function deleteDatabase (instanceName) {
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return new Promise((resolve, reject) => {
// close any open requests
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let openReq = openReqs[instanceName]
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if (openReq && openReq.result) {
openReq.result.close()
}
delete openReqs[instanceName]
delete databaseCache[instanceName]
let req = indexedDB.deleteDatabase(instanceName)
req.onsuccess = () => resolve()
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req.onerror = () => reject(req.error)
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})
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}