pinafore/routes/_utils/database/databaseCore.js

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import {
toReversePaddedBigInt
} from './utils'
import {
getDatabase,
dbPromise,
deleteDatabase,
} from './databaseLifecycle'
import {
META_STORE,
TIMELINE_STORE,
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STATUSES_STORE, ACCOUNTS_STORE
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} from './constants'
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import QuickLRU from 'quick-lru'
const statusesCache = new QuickLRU({maxSize: 100})
if (process.browser && process.env.NODE_ENV !== 'production') {
window.cacheStats = {
cache: statusesCache,
cacheHits: 0,
cacheMisses: 0
}
}
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export async function getTimeline(instanceName, timeline, maxId = null, limit = 20) {
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const db = await getDatabase(instanceName, timeline)
return await dbPromise(db, [TIMELINE_STORE, STATUSES_STORE], 'readonly', (stores, callback) => {
let [ timelineStore, statusesStore ] = stores
let negBigInt = maxId && toReversePaddedBigInt(maxId)
let start = negBigInt ? (timeline + '\u0000' + negBigInt) : (timeline + '\u0000')
let end = timeline + '\u0000\uffff'
let query = IDBKeyRange.bound(start, end, false, false)
timelineStore.getAll(query, limit).onsuccess = e => {
let timelineResults = e.target.result
let res = new Array(timelineResults.length)
timelineResults.forEach((timelineResult, i) => {
statusesStore.get(timelineResult.statusId).onsuccess = e => {
res[i] = e.target.result
}
})
callback(res)
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}
})
}
export async function insertStatuses(instanceName, timeline, statuses) {
for (let status of statuses) {
statusesCache.set(status.id, status)
}
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const db = await getDatabase(instanceName, timeline)
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await dbPromise(db, [TIMELINE_STORE, STATUSES_STORE, ACCOUNTS_STORE], 'readwrite', (stores) => {
let [ timelineStore, statusesStore, accountsStore ] = stores
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for (let status of statuses) {
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statusesStore.put(status)
// reverse chronological order, prefixed by timeline
timelineStore.put({
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id: (timeline + '\u0000' + toReversePaddedBigInt(status.id)),
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statusId: status.id
})
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accountsStore.put(status.account)
if (status.reblog) {
accountsStore.put(status.reblog.account)
}
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}
})
}
export async function getInstanceVerifyCredentials(instanceName) {
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const db = await getDatabase(instanceName)
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return await dbPromise(db, META_STORE, 'readonly', (store, callback) => {
store.get('verifyCredentials').onsuccess = (e) => {
callback(e.target.result && e.target.result.value)
}
})
}
export async function setInstanceVerifyCredentials(instanceName, verifyCredentials) {
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const db = await getDatabase(instanceName)
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return await dbPromise(db, META_STORE, 'readwrite', (store) => {
store.put({
key: 'verifyCredentials',
value: verifyCredentials
})
})
}
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export async function getAccount(instanceName, accountId) {
const db = await getDatabase(instanceName)
return await dbPromise(db, ACCOUNTS_STORE, 'readonly', (store, callback) => {
store.get(accountId).onsuccess = (e) => {
callback(e.target.result && e.target.result)
}
})
}
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export async function clearDatabaseForInstance(instanceName) {
await deleteDatabase(instanceName)
}
export async function getStatus(instanceName, statusId) {
if (statusesCache.has(statusId)) {
if (process.browser && process.env.NODE_ENV !== 'production') {
window.cacheStats.cacheHits++
}
return statusesCache.get(statusId)
}
const db = await getDatabase(instanceName)
let result = await dbPromise(db, STATUSES_STORE, 'readonly', (store, callback) => {
store.get(statusId).onsuccess = (e) => {
callback(e.target.result && e.target.result)
}
})
statusesCache.set(statusId, result)
if (process.browser && process.env.NODE_ENV !== 'production') {
window.cacheStats.cacheMisses++
}
return result
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}