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 { insertTimelineItems as insertTimelineItemsInDatabase } from '../_database/timelines/insertion' import { getTimeline as getTimelineFromDatabase } from '../_database/timelines/pagination' import { getStatus, getStatusContext } from '../_api/statuses' import { emit } from '../_utils/eventBus' const FETCH_LIMIT = 20 async function storeFreshTimelineItemsInDatabase (instanceName, timelineName, items) { await insertTimelineItemsInDatabase(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) } } async function fetchTimelineItems (instanceName, accessToken, timelineName, lastTimelineItemId, online) { mark('fetchTimelineItems') let items let stale = false if (!online) { items = await getTimelineFromDatabase(instanceName, timelineName, lastTimelineItemId, FETCH_LIMIT) stale = true } else { try { 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 getTimelineFromDatabase(instanceName, timelineName, lastTimelineItemId, FETCH_LIMIT) 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) { store.setForTimeline(instanceName, timelineName, { runningUpdate: true }) await fetchTimelineItemsAndPossiblyFallBack() store.setForTimeline(instanceName, timelineName, { runningUpdate: false }) } 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') }