pinafore/routes/_actions/timeline.js
2018-08-31 09:12:48 -07:00

161 lines
6.2 KiB
JavaScript

import { store } from '../_store/store'
import { getTimeline } from '../_api/timelines'
import { toast } from '../_utils/toast'
import { mark, stop } from '../_utils/marks'
import { concat, mergeArrays } from '../_utils/arrays'
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'
import { TIMELINE_BATCH_SIZE } from '../_static/timelines'
const SCROLL_TO_BOTTOM_DELAY = 2000
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, null, TIMELINE_BATCH_SIZE)
}
}
async function fetchTimelineItems (instanceName, accessToken, timelineName, lastTimelineItemId, online) {
mark('fetchTimelineItems')
let items
let stale = false
if (!online) {
items = await database.getTimeline(instanceName, timelineName, lastTimelineItemId, TIMELINE_BATCH_SIZE)
stale = true
} else {
try {
console.log('fetchTimelineItemsFromNetwork')
items = await fetchTimelineItemsFromNetwork(instanceName, accessToken, timelineName, lastTimelineItemId)
/* no await */ storeFreshTimelineItemsInDatabase(instanceName, timelineName, items)
} catch (e) {
console.error(e)
toast.say('Internet request failed. Showing offline content.')
items = await database.getTimeline(instanceName, timelineName, lastTimelineItemId, TIMELINE_BATCH_SIZE)
stale = true
}
}
stop('fetchTimelineItems')
return { items, stale }
}
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')
}
export async function addTimelineItemIds (instanceName, timelineName, newIds, newStale) {
let oldIds = store.getForTimeline(instanceName, timelineName, 'timelineItemIds')
let oldStale = store.getForTimeline(instanceName, timelineName, 'timelineItemIdsAreStale')
let mergedIds = mergeArrays(oldIds || [], newIds)
if (!isEqual(oldIds, mergedIds)) {
store.setForTimeline(instanceName, timelineName, { timelineItemIds: mergedIds })
}
if (oldStale !== newStale) {
store.setForTimeline(instanceName, timelineName, { timelineItemIdsAreStale: newStale })
}
}
async function fetchTimelineItemsAndPossiblyFallBack () {
mark('fetchTimelineItemsAndPossiblyFallBack')
let {
currentTimeline,
currentInstance,
accessToken,
lastTimelineItemId,
online
} = store.get()
let { items, stale } = await fetchTimelineItems(currentInstance, accessToken, currentTimeline, lastTimelineItemId, online)
addTimelineItems(currentInstance, currentTimeline, items, stale)
stop('fetchTimelineItemsAndPossiblyFallBack')
}
export async function setupTimeline () {
mark('setupTimeline')
// 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()
if (!timelineItemIds ||
timelineItemIdsAreStale ||
currentTimeline.startsWith('status/')) {
await fetchTimelineItemsAndPossiblyFallBack()
}
stop('setupTimeline')
}
export async function fetchTimelineItemsOnScrollToBottom (instanceName, timelineName) {
console.log('setting runningUpdate: true')
store.setForTimeline(instanceName, timelineName, { runningUpdate: true })
await fetchTimelineItemsAndPossiblyFallBack()
setTimeout(() => {
console.log('setting runningUpdate: false')
store.setForTimeline(instanceName, timelineName, { runningUpdate: false })
}, SCROLL_TO_BOTTOM_DELAY) // delay to avoid spamming network calls on scroll to bottom
}
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)
store.setForTimeline(instanceName, timelineName, {
itemIdsToAdd: [],
shouldShowHeader: false,
showHeader: false
})
stop('showMoreItemsForTimeline')
}
export async function showMoreItemsForCurrentTimeline () {
let { currentInstance, currentTimeline } = store.get()
return showMoreItemsForTimeline(
currentInstance,
currentTimeline
)
}
export async function showMoreItemsForThread (instanceName, timelineName) {
mark('showMoreItemsForThread')
let itemIdsToAdd = store.getForTimeline(instanceName, timelineName, 'itemIdsToAdd')
let timelineItemIds = store.getForTimeline(instanceName, timelineName, 'timelineItemIds')
// TODO: update database and do the thread merge correctly
timelineItemIds = timelineItemIds.concat(itemIdsToAdd)
store.setForTimeline(instanceName, timelineName, {
itemIdsToAdd: [],
timelineItemIds: timelineItemIds
})
stop('showMoreItemsForThread')
}