pinafore/routes/_components/Timeline.html

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<:Window bind:online />
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<div class="timeline" role="feed" aria-label="{{label}}" on:initialized>
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<VirtualList component="{{StatusListItem}}"
:makeProps
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items="{{statusIds}}"
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on:scrollToBottom="onScrollToBottom()"
shown="{{initialized}}"
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footerComponent="{{LoadingFooter}}"
showFooter="{{initialized && runningUpdate}}"
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storeKey="{{timeline}}"
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/>
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</div>
<style>
.timeline {
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min-height: 60vh;
}
</style>
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<script>
import { store } from '../_utils/store'
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import { getTimeline } from '../_utils/mastodon/timelines'
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import StatusListItem from './StatusListItem.html'
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import LoadingFooter from './LoadingFooter.html'
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import VirtualList from './VirtualList.html'
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import { splice, push } from 'svelte-extras'
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import { mergeStatuses } from '../_utils/statuses'
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import { mark, stop } from '../_utils/marks'
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import { timelines } from '../_static/timelines'
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import { toast } from '../_utils/toast'
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import { database } from '../_utils/database/database'
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const cachedTimelines = {}
if (process.browser && process.env.NODE_ENV !== 'production') {
window.cachedTimelines = cachedTimelines
}
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const FETCH_LIMIT = 20
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export default {
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async oncreate() {
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let timeline = this.get('timeline')
let cachedStatusIds = cachedTimelines[timeline]
if (cachedStatusIds) {
this.set({statusIds: cachedStatusIds})
} else {
this.addStatuses(await this.fetchStatusesAndPossiblyFallBack())
}
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// TODO: this is just a guess. allVisibleItemsHaveHeight should be more accurate
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requestAnimationFrame(() => {
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requestAnimationFrame(() => {
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this.set({initialized: true})
this.fire('initialized')
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})
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})
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},
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ondestroy() {
cachedTimelines[this.get('timeline')] = this.get('statusIds')
},
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data: () => ({
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StatusListItem: StatusListItem,
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LoadingFooter: LoadingFooter,
statusIds: [],
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runningUpdate: false,
initialized: false
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}),
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computed: {
makeProps: ($currentInstance) => (statusId) => database.getStatus($currentInstance, statusId),
lastStatusId: (statusIds) => statusIds.length && statusIds[statusIds.length - 1],
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label: (timeline, $currentInstance) => {
if (timelines[timeline]) {
`${timelines[timeline].label} timeline for ${$currentInstance}`
} else if (timeline.startsWith('tag/')) {
let tag = timeline.split('/').slice(-1)[0]
return `#${tag} timeline for ${$currentInstance}`
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} else if (timeline.startsWith('account/')) {
let account = timeline.split('/').slice(-1)[0]
return `Account #${account} on ${$currentInstance}`
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}
}
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},
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store: () => store,
components: {
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VirtualList
},
methods: {
splice: splice,
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push: push,
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async onScrollToBottom() {
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if (!this.get('initialized')) {
return
}
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if (this.get('runningUpdate')) {
return
}
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mark('onScrollToBottom')
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this.set({ runningUpdate: true })
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let newStatuses = await this.fetchStatusesAndPossiblyFallBack()
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this.set({ runningUpdate: false })
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this.addStatuses(newStatuses)
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stop('onScrollToBottom')
},
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addStatuses(newStatuses) {
if (process.env.NODE_ENV !== 'production') {
console.log('addStatuses()')
}
let instanceName = this.store.get('instanceName')
let timeline = this.get('timeline')
/* no await */ database.insertStatuses(instanceName, timeline, newStatuses)
let statusIds = this.get('statusIds')
if (!statusIds) {
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return
}
let newStatusIds = newStatuses.map(status => status.id)
let merged = mergeStatuses(statusIds, newStatusIds)
this.set({ statusIds: merged })
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},
async fetchStatusesAndPossiblyFallBack() {
let online = this.get('online')
let instanceName = this.store.get('currentInstance')
let instanceData = this.store.get('currentInstanceData')
let timeline = this.get('timeline')
let lastStatusId = this.get('lastStatusId')
let statuses
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if (!online) {
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statuses = await database.getTimeline(instanceName, timeline, lastStatusId, FETCH_LIMIT)
} else {
try {
statuses = await getTimeline(instanceName, instanceData.access_token, timeline, lastStatusId, FETCH_LIMIT)
/* no await */ database.insertStatuses(instanceName, timeline, statuses)
} catch (e) {
console.error(e)
toast.say('Internet request failed. Showing offline content.')
statuses = await database.getTimeline(instanceName, timeline, lastStatusId, FETCH_LIMIT)
}
}
return statuses
}
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}
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}
</script>