pinafore/routes/_database/timelines.js

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2018-02-09 06:04:10 +00:00
import { toReversePaddedBigInt } from './utils'
import { dbPromise, getDatabase } from './databaseLifecycle'
import { accountsCache, notificationsCache, setInCache, statusesCache } from './cache'
import {
ACCOUNTS_STORE, NOTIFICATION_TIMELINES_STORE, NOTIFICATIONS_STORE, STATUS_TIMELINES_STORE,
STATUSES_STORE
} from './constants'
import { getGenericEntityWithId } from './helpers'
function createKeyRange(timeline, maxId) {
let negBigInt = maxId && toReversePaddedBigInt(maxId)
let start = negBigInt ? (timeline + '\u0000' + negBigInt) : (timeline + '\u0000')
let end = timeline + '\u0000\uffff'
return IDBKeyRange.bound(start, end, false, false)
}
async function getNotificationTimeline(instanceName, timeline, maxId, limit) {
let storeNames = [NOTIFICATION_TIMELINES_STORE, NOTIFICATIONS_STORE]
const db = await getDatabase(instanceName)
return await dbPromise(db, storeNames, 'readonly', (stores, callback) => {
let [ timelineStore, notificationsStore ] = stores
let keyRange = createKeyRange(timeline, maxId)
timelineStore.getAll(keyRange, limit).onsuccess = e => {
let timelineResults = e.target.result
let res = new Array(timelineResults.length)
timelineResults.forEach((timelineResult, i) => {
notificationsStore.get(timelineResult.notificationId).onsuccess = e => {
res[i] = e.target.result
}
})
callback(res)
}
})
}
async function getStatusTimeline(instanceName, timeline, maxId, limit) {
let storeNames = [STATUS_TIMELINES_STORE, STATUSES_STORE]
const db = await getDatabase(instanceName)
return await dbPromise(db, storeNames, 'readonly', (stores, callback) => {
let [ timelineStore, statusesStore ] = stores
let keyRange = createKeyRange(timeline, maxId)
timelineStore.getAll(keyRange, 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)
}
})
}
export async function getTimeline(instanceName, timeline, maxId = null, limit = 20) {
return timeline === 'notifications' ?
await getNotificationTimeline(instanceName, timeline, maxId, limit) :
await getStatusTimeline(instanceName, timeline, maxId, limit)
}
function createTimelineId(timeline, id) {
// reverse chronological order, prefixed by timeline
return timeline + '\u0000' + toReversePaddedBigInt(id)
}
async function insertTimelineNotifications(instanceName, timeline, notifications) {
let storeNames = [NOTIFICATION_TIMELINES_STORE, NOTIFICATIONS_STORE, ACCOUNTS_STORE]
for (let notification of notifications) {
setInCache(notificationsCache, instanceName, notification.id, notification)
setInCache(accountsCache, instanceName, notification.account.id, notification.account)
}
const db = await getDatabase(instanceName)
await dbPromise(db, storeNames, 'readwrite', (stores) => {
let [ timelineStore, notificationsStore, accountsStore ] = stores
for (let notification of notifications) {
notificationsStore.put(notification)
timelineStore.put({
id: createTimelineId(timeline, notification.id),
notificationId: notification.id
})
accountsStore.put(notification.account)
}
})
}
async function insertTimelineStatuses(instanceName, timeline, statuses) {
let storeNames = [STATUS_TIMELINES_STORE, STATUSES_STORE, ACCOUNTS_STORE]
for (let status of statuses) {
setInCache(statusesCache, instanceName, status.id, status)
setInCache(accountsCache, instanceName, status.account.id, status.account)
if (status.reblog) {
setInCache(accountsCache, instanceName, status.reblog.account.id, status.reblog.account)
}
}
const db = await getDatabase(instanceName)
await dbPromise(db, storeNames, 'readwrite', (stores) => {
let [ timelineStore, statusesStore, accountsStore ] = stores
for (let status of statuses) {
statusesStore.put(status)
timelineStore.put({
id: createTimelineId(timeline, status.id),
statusId: status.id
})
accountsStore.put(status.account)
if (status.reblog) {
accountsStore.put(status.reblog.account)
}
}
})
}
export async function insertTimelineItems(instanceName, timeline, timelineItems) {
return timeline === 'notifications' ?
await insertTimelineNotifications(instanceName, timeline, timelineItems) :
await insertTimelineStatuses(instanceName, timeline, timelineItems)
}
export async function getStatus(instanceName, statusId) {
return await getGenericEntityWithId(STATUSES_STORE, statusesCache, instanceName, statusId)
}
export async function getNotification(instanceName, notificationId) {
return await getGenericEntityWithId(NOTIFICATIONS_STORE, notificationsCache, instanceName, notificationId)
}