pinafore/routes/_actions/timeline.js

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import { store } from '../_store/store'
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import { getTimeline } from '../_api/timelines'
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import { toast } from '../_utils/toast'
import { mark, stop } from '../_utils/marks'
import { concat, mergeArrays } from '../_utils/arrays'
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import { byItemIds } 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'
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const FETCH_LIMIT = 20
async function storeFreshTimelineItemsInDatabase (instanceName, timelineName, items) {
await database.insertTimelineItems(instanceName, timelineName, items)
if (timelineName.startsWith('status/')) {
// For status threads, we want to be sure to update the favorite/reblog counts even if
// this is a stale "view" of the status. See 119-status-counts-update.js for
// an example of why we need this.
items.forEach(item => {
emit('statusUpdated', item)
})
}
}
async function fetchTimelineItemsFromNetwork (instanceName, accessToken, timelineName, lastTimelineItemId) {
if (timelineName.startsWith('status/')) { // special case - this is a list of descendents and ancestors
let statusId = timelineName.split('/').slice(-1)[0]
let statusRequest = getStatus(instanceName, accessToken, statusId)
let contextRequest = getStatusContext(instanceName, accessToken, statusId)
let [ status, context ] = await Promise.all([statusRequest, contextRequest])
return concat(context.ancestors, status, context.descendants)
} else { // normal timeline
return getTimeline(instanceName, accessToken, timelineName, lastTimelineItemId, FETCH_LIMIT)
}
}
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async function fetchTimelineItems (instanceName, accessToken, timelineName, lastTimelineItemId, online) {
mark('fetchTimelineItems')
let items
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let stale = false
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if (!online) {
items = await database.getTimeline(instanceName, timelineName, lastTimelineItemId, FETCH_LIMIT)
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stale = true
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} else {
try {
items = await fetchTimelineItemsFromNetwork(instanceName, accessToken, timelineName, lastTimelineItemId)
/* no await */ storeFreshTimelineItemsInDatabase(instanceName, timelineName, items)
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} catch (e) {
console.error(e)
toast.say('Internet request failed. Showing offline content.')
items = await database.getTimeline(instanceName, timelineName, lastTimelineItemId, FETCH_LIMIT)
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stale = true
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}
}
stop('fetchTimelineItems')
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return { items, stale }
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}
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async function addTimelineItems (instanceName, timelineName, items, stale) {
console.log('addTimelineItems, length:', items.length)
mark('addTimelineItems')
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let newIds = items.map(item => item.id)
addTimelineItemIds(instanceName, timelineName, newIds, stale)
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stop('addTimelineItems')
}
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export async function addTimelineItemIds (instanceName, timelineName, newIds, newStale) {
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let oldIds = store.getForTimeline(instanceName, timelineName, 'timelineItemIds')
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let oldStale = store.getForTimeline(instanceName, timelineName, 'timelineItemIdsAreStale')
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let mergedIds = mergeArrays(oldIds || [], newIds)
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if (!isEqual(oldIds, mergedIds)) {
store.setForTimeline(instanceName, timelineName, { timelineItemIds: mergedIds })
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}
if (oldStale !== newStale) {
store.setForTimeline(instanceName, timelineName, { timelineItemIdsAreStale: newStale })
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}
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}
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async function fetchTimelineItemsAndPossiblyFallBack () {
mark('fetchTimelineItemsAndPossiblyFallBack')
let {
currentTimeline,
currentInstance,
accessToken,
lastTimelineItemId,
online
} = store.get()
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let { items, stale } = await fetchTimelineItems(currentInstance, accessToken, currentTimeline, lastTimelineItemId, online)
addTimelineItems(currentInstance, currentTimeline, items, stale)
stop('fetchTimelineItemsAndPossiblyFallBack')
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}
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export async function setupTimeline () {
mark('setupTimeline')
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// If we don't have any item ids, or if the current item ids 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,
currentTimeline
} = store.get()
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if (!timelineItemIds ||
timelineItemIdsAreStale ||
currentTimeline.startsWith('status/')) {
await fetchTimelineItemsAndPossiblyFallBack()
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}
stop('setupTimeline')
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}
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export async function fetchTimelineItemsOnScrollToBottom (instanceName, timelineName) {
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store.setForTimeline(instanceName, timelineName, { runningUpdate: true })
await fetchTimelineItemsAndPossiblyFallBack()
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store.setForTimeline(instanceName, timelineName, { runningUpdate: false })
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}
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export async function showMoreItemsForTimeline (instanceName, timelineName) {
mark('showMoreItemsForTimeline')
let itemIdsToAdd = store.getForTimeline(instanceName, timelineName, 'itemIdsToAdd')
itemIdsToAdd = itemIdsToAdd.sort(byItemIds).reverse()
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addTimelineItemIds(instanceName, timelineName, itemIdsToAdd, false)
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store.setForTimeline(instanceName, timelineName, {
itemIdsToAdd: [],
shouldShowHeader: false,
showHeader: false
})
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stop('showMoreItemsForTimeline')
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}
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export async function showMoreItemsForCurrentTimeline () {
let { currentInstance, currentTimeline } = store.get()
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return showMoreItemsForTimeline(
currentInstance,
currentTimeline
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)
}
export async function showMoreItemsForThread (instanceName, timelineName) {
mark('showMoreItemsForThread')
let itemIdsToAdd = store.getForTimeline(instanceName, timelineName, 'itemIdsToAdd')
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let timelineItemIds = store.getForTimeline(instanceName, timelineName, 'timelineItemIds')
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// TODO: update database and do the thread merge correctly
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timelineItemIds = timelineItemIds.concat(itemIdsToAdd)
store.setForTimeline(instanceName, timelineName, {
itemIdsToAdd: [],
timelineItemIds: timelineItemIds
})
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stop('showMoreItemsForThread')
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}