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refactor: use timeline item summaries instead of ids (#1072) 

As described in https://github.com/nolanlawson/pinafore/issues/369#issuecomment-467211908 this is the first step toward fixing #369
This commit is contained in:
Nolan Lawson 2019-03-03 13:24:55 -08:00 committed by GitHub
parent b14f818e81
commit 7e5f58b969
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GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 134 additions and 95 deletions
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56
src/routes/_actions/addStatusOrNotification.js
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@ -1,15 +1,15 @@
import { mark, stop } from '../_utils/marks'
import { store } from '../_store/store'
import uniqBy from 'lodash-es/uniqBy'
import uniq from 'lodash-es/uniq'
import isEqual from 'lodash-es/isEqual'
import { database } from '../_database/database'
import { concat } from '../_utils/arrays'
import { concat, indexWhere } from '../_utils/arrays'
import { scheduleIdleTask } from '../_utils/scheduleIdleTask'
import { timelineItemToSummary } from '../_utils/timelineItemToSummary'
function getExistingItemIdsSet (instanceName, timelineName) {
let timelineItemIds = store.getForTimeline(instanceName, timelineName, 'timelineItemIds') || []
return new Set(timelineItemIds)
let timelineItemSummaries = store.getForTimeline(instanceName, timelineName, 'timelineItemSummaries') || []
return new Set(timelineItemSummaries.map(_ => _.id))
}
function removeDuplicates (instanceName, timelineName, updates) {
@ -27,28 +27,37 @@ async function insertUpdatesIntoTimeline (instanceName, timelineName, updates) {
await database.insertTimelineItems(instanceName, timelineName, updates)
let itemIdsToAdd = store.getForTimeline(instanceName, timelineName, 'itemIdsToAdd') || []
let newItemIdsToAdd = uniq(concat(itemIdsToAdd, updates.map(_ => _.id)))
if (!isEqual(itemIdsToAdd, newItemIdsToAdd)) {
console.log('adding ', (newItemIdsToAdd.length - itemIdsToAdd.length),
'items to itemIdsToAdd for timeline', timelineName)
store.setForTimeline(instanceName, timelineName, { itemIdsToAdd: newItemIdsToAdd })
let itemSummariesToAdd = store.getForTimeline(instanceName, timelineName, 'timelineItemSummariesToAdd') || []
console.log('itemSummariesToAdd', JSON.parse(JSON.stringify(itemSummariesToAdd)))
console.log('updates.map(timelineItemToSummary)', JSON.parse(JSON.stringify(updates.map(timelineItemToSummary))))
console.log('concat(itemSummariesToAdd, updates.map(timelineItemToSummary))',
JSON.parse(JSON.stringify(concat(itemSummariesToAdd, updates.map(timelineItemToSummary)))))
let newItemSummariesToAdd = uniqBy(
concat(itemSummariesToAdd, updates.map(timelineItemToSummary)),
_ => _.id
)
if (!isEqual(itemSummariesToAdd, newItemSummariesToAdd)) {
console.log('adding ', (newItemSummariesToAdd.length - itemSummariesToAdd.length),
'items to timelineItemSummariesToAdd for timeline', timelineName)
store.setForTimeline(instanceName, timelineName, { timelineItemSummariesToAdd: newItemSummariesToAdd })
}
}
function isValidStatusForThread (thread, timelineName, itemIdsToAdd) {
function isValidStatusForThread (thread, timelineName, itemSummariesToAdd) {
let itemSummariesToAddIdSet = new Set(itemSummariesToAdd.map(_ => _.id))
let threadIdSet = new Set(thread.map(_ => _.id))
let focusedStatusId = timelineName.split('/')[1] // e.g. "status/123456"
let focusedStatusIdx = thread.indexOf(focusedStatusId)
let focusedStatusIdx = indexWhere(thread, _ => _.id === focusedStatusId)
return status => {
let repliedToStatusIdx = thread.indexOf(status.in_reply_to_id)
let repliedToStatusIdx = indexWhere(thread, _ => _.id === status.in_reply_to_id)
return (
// A reply to an ancestor status is not valid for this thread, but for the focused status
// itself or any of its descendents, it is valid.
repliedToStatusIdx >= focusedStatusIdx &&
// Not a duplicate
!thread.includes(status.id) &&
!threadIdSet.has(status.id) &&
// Not already about to be added
!itemIdsToAdd.includes(status.id)
!itemSummariesToAddIdSet.has(status.id)
)
}
}
@ -63,16 +72,19 @@ async function insertUpdatesIntoThreads (instanceName, updates) {
for (let timelineName of timelineNames) {
let thread = threads[timelineName]
let itemIdsToAdd = store.getForTimeline(instanceName, timelineName, 'itemIdsToAdd') || []
let validUpdates = updates.filter(isValidStatusForThread(thread, timelineName, itemIdsToAdd))
let itemSummariesToAdd = store.getForTimeline(instanceName, timelineName, 'timelineItemSummariesToAdd') || []
let validUpdates = updates.filter(isValidStatusForThread(thread, timelineName, itemSummariesToAdd))
if (!validUpdates.length) {
continue
}
let newItemIdsToAdd = uniq(concat(itemIdsToAdd, validUpdates.map(_ => _.id)))
if (!isEqual(itemIdsToAdd, newItemIdsToAdd)) {
console.log('adding ', (newItemIdsToAdd.length - itemIdsToAdd.length),
'items to itemIdsToAdd for thread', timelineName)
store.setForTimeline(instanceName, timelineName, { itemIdsToAdd: newItemIdsToAdd })
let newItemSummariesToAdd = uniqBy(
concat(itemSummariesToAdd, validUpdates.map(timelineItemToSummary)),
_ => _.id
)
if (!isEqual(itemSummariesToAdd, newItemSummariesToAdd)) {
console.log('adding ', (newItemSummariesToAdd.length - itemSummariesToAdd.length),
'items to timelineItemSummariesToAdd for thread', timelineName)
store.setForTimeline(instanceName, timelineName, { timelineItemSummariesToAdd: newItemSummariesToAdd })
}
}
}

11
src/routes/_actions/deleteStatuses.js
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@ -5,20 +5,21 @@ import { database } from '../_database/database'
import { scheduleIdleTask } from '../_utils/scheduleIdleTask'
function filterItemIdsFromTimelines (instanceName, timelineFilter, idFilter) {
let keys = ['timelineItemIds', 'itemIdsToAdd']
let keys = ['timelineItemSummaries', 'timelineItemSummariesToAdd']
let summaryFilter = _ => idFilter(_.id)
keys.forEach(key => {
let timelineData = store.getAllTimelineData(instanceName, key)
Object.keys(timelineData).forEach(timelineName => {
let ids = timelineData[timelineName]
let summaries = timelineData[timelineName]
if (!timelineFilter(timelineName)) {
return
}
let filteredIds = ids.filter(idFilter)
if (!isEqual(ids, filteredIds)) {
let filteredSummaries = summaries.filter(summaryFilter)
if (!isEqual(summaries, filteredSummaries)) {
console.log('deleting an item from timelineName', timelineName, 'for key', key)
store.setForTimeline(instanceName, timelineName, {
[key]: filteredIds
[key]: filteredSummaries
})
}
})

58
src/routes/_actions/timeline.js
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@ -3,12 +3,13 @@ import { getTimeline } from '../_api/timelines'
import { toast } from '../_components/toast/toast'
import { mark, stop } from '../_utils/marks'
import { concat, mergeArrays } from '../_utils/arrays'
import { byItemIds } from '../_utils/sorting'
import { compareTimelineItemSummaries } from '../_utils/sorting'
import isEqual from 'lodash-es/isEqual'
import { database } from '../_database/database'
import { getStatus, getStatusContext } from '../_api/statuses'
import { emit } from '../_utils/eventBus'
import { TIMELINE_BATCH_SIZE } from '../_static/timelines'
import { timelineItemToSummary } from '../_utils/timelineItemToSummary'
async function storeFreshTimelineItemsInDatabase (instanceName, timelineName, items) {
await database.insertTimelineItems(instanceName, timelineName, items)
@ -59,23 +60,23 @@ async function fetchTimelineItems (instanceName, accessToken, timelineName, last
async function addTimelineItems (instanceName, timelineName, items, stale) {
console.log('addTimelineItems, length:', items.length)
mark('addTimelineItems')
let newIds = items.map(item => item.id)
addTimelineItemIds(instanceName, timelineName, newIds, stale)
stop('addTimelineItems')
mark('addTimelineItemSummaries')
let newSummaries = items.map(timelineItemToSummary)
addTimelineItemSummaries(instanceName, timelineName, newSummaries, stale)
stop('addTimelineItemSummaries')
}
export async function addTimelineItemIds (instanceName, timelineName, newIds, newStale) {
let oldIds = store.getForTimeline(instanceName, timelineName, 'timelineItemIds')
let oldStale = store.getForTimeline(instanceName, timelineName, 'timelineItemIdsAreStale')
export async function addTimelineItemSummaries (instanceName, timelineName, newSummaries, newStale) {
let oldSummaries = store.getForTimeline(instanceName, timelineName, 'timelineItemSummaries') || []
let oldStale = store.getForTimeline(instanceName, timelineName, 'timelineItemSummariesAreStale')
let mergedIds = mergeArrays(oldIds || [], newIds)
let mergedSummaries = mergeArrays(oldSummaries, newSummaries, compareTimelineItemSummaries)
if (!isEqual(oldIds, mergedIds)) {
store.setForTimeline(instanceName, timelineName, { timelineItemIds: mergedIds })
if (!isEqual(oldSummaries, mergedSummaries)) {
store.setForTimeline(instanceName, timelineName, { timelineItemSummaries: mergedSummaries })
}
if (oldStale !== newStale) {
store.setForTimeline(instanceName, timelineName, { timelineItemIdsAreStale: newStale })
store.setForTimeline(instanceName, timelineName, { timelineItemSummariesAreStale: newStale })
}
}
@ -96,17 +97,17 @@ async function fetchTimelineItemsAndPossiblyFallBack () {
export async function setupTimeline () {
mark('setupTimeline')
// If we don't have any item ids, or if the current item ids are stale
// If we don't have any item summaries, or if the current item summaries are stale
// (i.e. via offline mode), then we need to re-fetch
// Also do this if it's a thread, because threads change pretty frequently and
// we don't have a good way to update them.
let {
timelineItemIds,
timelineItemIdsAreStale,
timelineItemSummaries,
timelineItemSummariesAreStale,
currentTimeline
} = store.get()
if (!timelineItemIds ||
timelineItemIdsAreStale ||
if (!timelineItemSummaries ||
timelineItemSummariesAreStale ||
currentTimeline.startsWith('status/')) {
await fetchTimelineItemsAndPossiblyFallBack()
}
@ -123,11 +124,11 @@ export async function fetchTimelineItemsOnScrollToBottom (instanceName, timeline
export async function showMoreItemsForTimeline (instanceName, timelineName) {
mark('showMoreItemsForTimeline')
let itemIdsToAdd = store.getForTimeline(instanceName, timelineName, 'itemIdsToAdd')
itemIdsToAdd = itemIdsToAdd.sort(byItemIds).reverse()
addTimelineItemIds(instanceName, timelineName, itemIdsToAdd, false)
let itemSummariesToAdd = store.getForTimeline(instanceName, timelineName, 'timelineItemSummariesToAdd')
itemSummariesToAdd = itemSummariesToAdd.sort(compareTimelineItemSummaries).reverse()
addTimelineItemSummaries(instanceName, timelineName, itemSummariesToAdd, false)
store.setForTimeline(instanceName, timelineName, {
itemIdsToAdd: [],
timelineItemSummariesToAdd: [],
shouldShowHeader: false,
showHeader: false
})
@ -144,17 +145,18 @@ export async function showMoreItemsForCurrentTimeline () {
export async function showMoreItemsForThread (instanceName, timelineName) {
mark('showMoreItemsForThread')
let itemIdsToAdd = store.getForTimeline(instanceName, timelineName, 'itemIdsToAdd')
let timelineItemIds = store.getForTimeline(instanceName, timelineName, 'timelineItemIds')
let itemSummariesToAdd = store.getForTimeline(instanceName, timelineName, 'timelineItemSummariesToAdd')
let timelineItemSummaries = store.getForTimeline(instanceName, timelineName, 'timelineItemSummaries')
let timelineItemIds = new Set(timelineItemSummaries.map(_ => _.id))
// TODO: update database and do the thread merge correctly
for (let itemIdToAdd of itemIdsToAdd) {
if (!timelineItemIds.includes(itemIdToAdd)) {
timelineItemIds.push(itemIdToAdd)
for (let itemSummaryToAdd of itemSummariesToAdd) {
if (!timelineItemIds.has(itemSummaryToAdd.id)) {
timelineItemSummaries.push(itemSummaryToAdd)
}
}
store.setForTimeline(instanceName, timelineName, {
itemIdsToAdd: [],
timelineItemIds: timelineItemIds
timelineItemSummariesToAdd: [],
timelineItemSummaries: timelineItemSummaries
})
stop('showMoreItemsForThread')
}

24
src/routes/_components/timeline/Timeline.html
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@ -1,11 +1,4 @@
<h1 class="sr-only">{label}</h1>
<!-- for debugging
<div style="padding:5px;position:fixed;left:0;top:0;z-index:999999999;font-size:0.9em;width: 75vw;background:rgba(0, 0, 0, 0.8);color:white;pointer-events:none;">
<p>$timelineItemIds: {JSON.stringify(($timelineItemIds || []).map(_ => '...' + _.slice(-6)), null, ' ')}</p>
<p>$itemIdsToAdd: {JSON.stringify(($itemIdsToAdd || []).map(_ => '...' + _.slice(-6)), null, ' ')}</p>
<p>$runningUpdate: {$runningUpdate}</p>
</div>
-->
<div class="timeline"
role="feed"
on:focusWithCapture="saveFocus(event)"
@ -18,7 +11,7 @@
component={result.listItemComponent}
realm="{$currentInstance + '/' + timeline}"
{makeProps}
items={$timelineItemIds}
items={itemIds}
showFooter={true}
footerComponent={LoadingFooter}
showHeader={$showHeader}
@ -130,10 +123,19 @@
// Scroll to the first item if this is a "status in own thread" timeline.
// Don't scroll to the first item because it obscures the "back" button.
scrollToItem: ({ timelineType, timelineValue, $firstTimelineItemId }) => (
timelineType === 'status' && $firstTimelineItemId &&
timelineValue !== $firstTimelineItemId && timelineValue
timelineType === 'status' &&
$firstTimelineItemId &&
timelineValue !== $firstTimelineItemId &&
timelineValue
),
itemIds: ({ $timelineItemSummaries }) => (
// TODO: filter
$timelineItemSummaries && $timelineItemSummaries.map(_ => _.id)
),
itemIdsToAdd: ({ $timelineItemSummariesToAdd }) => (
// TODO: filter
$timelineItemSummariesToAdd && $timelineItemSummariesToAdd.map(_ => _.id)
),
itemIdsToAdd: ({ $itemIdsToAdd }) => $itemIdsToAdd,
headerProps: ({ itemIdsToAdd }) => {
return {
count: itemIdsToAdd ? itemIdsToAdd.length : 0,

21
src/routes/_store/computations/timelineComputations.js
View File

@ -1,4 +1,5 @@
import { get } from '../../_utils/lodash-lite'
import { getFirstIdFromItemSummaries, getLastIdFromItemSummaries } from '../../_utils/getIdFromItemSummaries'
function computeForTimeline (store, key, defaultValue) {
store.compute(key,
@ -10,24 +11,24 @@ function computeForTimeline (store, key, defaultValue) {
}
export function timelineComputations (store) {
computeForTimeline(store, 'timelineItemIds', null)
computeForTimeline(store, 'timelineItemSummaries', null)
computeForTimeline(store, 'timelineItemSummariesToAdd', null)
computeForTimeline(store, 'runningUpdate', false)
computeForTimeline(store, 'lastFocusedElementId', null)
computeForTimeline(store, 'ignoreBlurEvents', false)
computeForTimeline(store, 'itemIdsToAdd', null)
computeForTimeline(store, 'showHeader', false)
computeForTimeline(store, 'shouldShowHeader', false)
computeForTimeline(store, 'timelineItemIdsAreStale', false)
computeForTimeline(store, 'timelineItemSummariesAreStale', false)
store.compute('firstTimelineItemId', ['timelineItemIds'], (timelineItemIds) => {
return timelineItemIds && timelineItemIds[0]
})
store.compute('lastTimelineItemId', ['timelineItemIds'], (timelineItemIds) => {
return timelineItemIds && timelineItemIds[timelineItemIds.length - 1]
})
store.compute('firstTimelineItemId', ['timelineItemSummaries'], (timelineItemSummaries) => (
getFirstIdFromItemSummaries(timelineItemSummaries)
))
store.compute('lastTimelineItemId', ['timelineItemSummaries'], (timelineItemSummaries) => (
getLastIdFromItemSummaries(timelineItemSummaries)
))
store.compute('numberOfNotifications',
[`timelineData_itemIdsToAdd`, 'currentInstance'],
[`timelineData_timelineItemSummariesToAdd`, 'currentInstance'],
(root, currentInstance) => (
(root && root[currentInstance] && root[currentInstance].notifications &&
root[currentInstance].notifications.length) || 0

2
src/routes/_store/mixins/timelineMixins.js
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@ -31,7 +31,7 @@ export function timelineMixins (Store) {
}
Store.prototype.getThreads = function (instanceName) {
let instanceData = this.getAllTimelineData(instanceName, 'timelineItemIds')
let instanceData = this.getAllTimelineData(instanceName, 'timelineItemSummaries')
return pickBy(instanceData, (value, key) => {
return key.startsWith('status/')

13
src/routes/_store/observers/instanceObservers.js
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@ -9,6 +9,7 @@ import { TIMELINE_BATCH_SIZE } from '../../_static/timelines'
import { scheduleIdleTask } from '../../_utils/scheduleIdleTask'
import { mark, stop } from '../../_utils/marks'
import { store } from '../store'
import { getFirstIdFromItemSummaries } from '../../_utils/getIdFromItemSummaries'
// stream to watch for home timeline updates and notifications
let currentInstanceStream
@ -56,12 +57,12 @@ async function refreshInstanceData (instanceName) {
}
function stream (store, instanceName, currentInstanceInfo) {
let homeTimelineItemIds = store.getForTimeline(instanceName,
'home', 'timelineItemIds')
let firstHomeTimelineItemId = homeTimelineItemIds && homeTimelineItemIds[0]
let notificationItemIds = store.getForTimeline(instanceName,
'notifications', 'timelineItemIds')
let firstNotificationTimelineItemId = notificationItemIds && notificationItemIds[0]
let homeTimelineItemSummaries = store.getForTimeline(instanceName,
'home', 'timelineItemSummaries')
let firstHomeTimelineItemId = getFirstIdFromItemSummaries(homeTimelineItemSummaries)
let notificationItemSummaries = store.getForTimeline(instanceName,
'notifications', 'timelineItemSummaries')
let firstNotificationTimelineItemId = getFirstIdFromItemSummaries(notificationItemSummaries)
let { accessToken } = store.get()
let streamingApi = currentInstanceInfo.urls.streaming_api

7
src/routes/_store/observers/timelineObservers.js
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@ -4,6 +4,7 @@ import { getTimeline } from '../../_api/timelines'
import { addStatusesOrNotifications } from '../../_actions/addStatusOrNotification'
import { TIMELINE_BATCH_SIZE } from '../../_static/timelines'
import { store } from '../store'
import { getFirstIdFromItemSummaries } from '../../_utils/getIdFromItemSummaries'
export function timelineObservers () {
// stream to watch for local/federated/etc. updates. home and notification
@ -58,9 +59,9 @@ export function timelineObservers () {
return
}
let timelineItemIds = store.getForTimeline(currentInstance,
currentTimeline, 'timelineItemIds')
let firstTimelineItemId = timelineItemIds && timelineItemIds[0]
let timelineItemSummaries = store.getForTimeline(currentInstance,
currentTimeline, 'timelineItemSummaries')
let firstTimelineItemId = getFirstIdFromItemSummaries(timelineItemSummaries)
let onOpenStream = async () => {
if (!firstTimelineItemId || !currentTimelineIsUnchanged()) {

10
src/routes/_utils/arrays.js
View File

@ -1,6 +1,5 @@
// Merge two arrays, assuming both input arrays have the same order
// and items are comparable
export function mergeArrays (leftArray, rightArray) {
// Merge two arrays, using the given comparator
export function mergeArrays (leftArray, rightArray, comparator) {
let leftIndex = 0
let rightIndex = 0
let merged = []
@ -17,11 +16,12 @@ export function mergeArrays (leftArray, rightArray) {
}
let left = leftArray[leftIndex]
let right = rightArray[rightIndex]
if (right === left) {
let comparison = comparator(right, left)
if (comparison === 0) {
merged.push(left)
rightIndex++
leftIndex++
} else if (parseInt(right, 10) > parseInt(left, 10)) {
} else if (comparison > 0) {
merged.push(right)
rightIndex++
} else {

11
src/routes/_utils/getIdFromItemSummaries.js Normal file
View File

@ -0,0 +1,11 @@
export function getFirstIdFromItemSummaries (itemSummaries) {
return itemSummaries &&
itemSummaries[0] &&
itemSummaries[0].id
}
export function getLastIdFromItemSummaries (itemSummaries) {
return itemSummaries &&
itemSummaries[itemSummaries.length - 1] &&
itemSummaries[itemSummaries.length - 1].id
}

8
src/routes/_utils/sorting.js
View File

@ -17,8 +17,8 @@ export function toReversePaddedBigInt (id) {
return res
}
export function byItemIds (a, b) {
let aPadded = toPaddedBigInt(a)
let bPadded = toPaddedBigInt(b)
return aPadded < bPadded ? -1 : aPadded === bPadded ? 0 : 1
export function compareTimelineItemSummaries (left, right) {
let leftPadded = toPaddedBigInt(left.id)
let rightPadded = toPaddedBigInt(right.id)
return leftPadded < rightPadded ? -1 : leftPadded === rightPadded ? 0 : 1
}

8
src/routes/_utils/timelineItemToSummary.js Normal file
View File

@ -0,0 +1,8 @@
export function timelineItemToSummary (item) {
return {
id: item.id,
replyId: (item.in_reply_to_id) || void 0,
reblogId: (item.reblog && item.reblog.id) || void 0,
type: item.type || void 0
}
}