pinafore/routes/_components/Timeline.html
2018-01-20 13:01:33 -08:00

108 lines
3.6 KiB
HTML

<:Window bind:online />
<div class="timeline" role="feed" aria-label="{{label}}" on:initialized >
<VirtualList component="{{StatusListItem}}"
items="{{keyedStatuses}}"
on:scrollToBottom="onScrollToBottom()" />
</div>
<style>
.timeline {
min-height: 60vh;
}
</style>
<script>
import { store } from '../_utils/store'
import { getTimeline } from '../_utils/mastodon/timelines'
import StatusListItem from './StatusListItem.html'
import VirtualList from './VirtualList.html'
import { splice, push } from 'svelte-extras'
import worker from 'workerize-loader!../_utils/database/database'
import { mergeStatuses } from '../_utils/statuses'
import { mark, stop } from '../_utils/marks'
import { timelines } from '../_static/timelines'
import { toast } from '../_utils/toast'
const database = worker()
const FETCH_LIMIT = 20
export default {
async oncreate() {
let instanceName = this.store.get('currentInstance')
let instanceData = this.store.get('currentInstanceData')
let online = this.get('online')
let timeline = this.get('timeline')
let statuses = await this.fetchStatusesAndPossiblyFallBack()
this.addStatuses(statuses)
this.set({initialized: true})
this.fire('initialized')
},
data: () => ({
StatusListItem: StatusListItem,
statuses: [],
runningUpdate: false,
initialized: false
}),
computed: {
keyedStatuses: (statuses) => statuses.map(status => ({
props: status,
key: status.id
})),
lastStatusId: (statuses) => statuses.length && statuses[statuses.length - 1].id,
label: (timeline, $currentInstance) => `${timelines[timeline].label} timeline for ${$currentInstance}`
},
store: () => store,
components: {
VirtualList
},
methods: {
splice: splice,
push: push,
async onScrollToBottom() {
if (!this.get('initialized')) {
return
}
if (this.get('runningUpdate')) {
return
}
mark('onScrollToBottom')
this.set({ runningUpdate: true })
let newStatuses = await this.fetchStatusesAndPossiblyFallBack()
this.addStatuses(newStatuses)
this.set({ runningUpdate: false })
stop('onScrollToBottom')
},
addStatuses(newStatuses) {
if (process.env.NODE_ENV !== 'production') {
console.log('addStatuses()')
}
let statuses = this.get('statuses')
if (!statuses) {
return
}
let merged = mergeStatuses(statuses, newStatuses)
this.set({ statuses: merged })
},
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
if (!online) {
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
}
}
}
</script>