pinafore/routes/_store/observers/instanceObservers.js

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import { updateInstanceInfo, updateVerifyCredentialsForInstance } from '../../_actions/instances'
import { updateLists } from '../../_actions/lists'
import { createStream } from '../../_actions/streaming'
import { updateCustomEmojiForInstance } from '../../_actions/emoji'
import { addStatusesOrNotifications } from '../../_actions/addStatusOrNotification'
import { getTimeline } from '../../_api/timelines'
export function instanceObservers (store) {
// stream to watch for home timeline updates and notifications
let currentInstanceStream
store.observe('currentInstance', async (currentInstance) => {
if (!process.browser) {
return
}
if (currentInstanceStream) {
currentInstanceStream.close()
currentInstanceStream = null
if (process.env.NODE_ENV !== 'production') {
window.currentInstanceStream = null
}
}
if (!currentInstance) {
return
}
updateVerifyCredentialsForInstance(currentInstance)
updateInstanceInfo(currentInstance)
updateCustomEmojiForInstance(currentInstance)
updateLists()
await updateInstanceInfo(currentInstance)
let currentInstanceIsUnchanged = () => {
return store.get('currentInstance') === currentInstance
}
if (!currentInstanceIsUnchanged()) {
return
}
let instanceInfo = store.get('currentInstanceInfo')
if (!instanceInfo) {
return
}
let homeTimelineItemIds = store.getForTimeline(currentInstance,
'home', 'timelineItemIds')
let firstHomeTimelineItemId = homeTimelineItemIds && homeTimelineItemIds[0]
let notificationItemIds = store.getForTimeline(currentInstance,
'notifications', 'timelineItemIds')
let firstNotificationTimelineItemId = notificationItemIds && notificationItemIds[0]
let onOpenStream = async () => {
if (!currentInstanceIsUnchanged()) {
return
}
// fill in the "streaming gap" i.e. fetch the most recent 20 items so that there isn't
// a big gap in the timeline if you haven't looked at it in awhile
async function fillGap (timelineName, firstTimelineItemId) {
if (!firstTimelineItemId) {
return
}
let newTimelineItems = await getTimeline(currentInstance, accessToken,
timelineName, null, firstTimelineItemId)
if (newTimelineItems.length) {
addStatusesOrNotifications(currentInstance, timelineName, newTimelineItems)
}
}
await Promise.all([
fillGap('home', firstHomeTimelineItemId),
fillGap('notifications', firstNotificationTimelineItemId)
])
}
let accessToken = store.get('accessToken')
let streamingApi = instanceInfo.urls.streaming_api
currentInstanceStream = createStream(streamingApi,
currentInstance, accessToken, 'home', onOpenStream)
if (process.env.NODE_ENV !== 'production') {
window.currentInstanceStream = currentInstanceStream
}
})
}