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import {makeAutoObservable} from 'mobx'
import {bsky} from '@adxp/mock-api'
import {RootStoreModel} from './root-store'
export class FeedViewItemModel implements bsky.FeedView.FeedItem {
_reactKey: string = ''
uri: string = ''
author: bsky.FeedView.User = {did: '', name: '', displayName: ''}
repostedBy?: bsky.FeedView.User
record: Record<string, unknown> = {}
embed?:
| bsky.FeedView.RecordEmbed
| bsky.FeedView.ExternalEmbed
| bsky.FeedView.UnknownEmbed
replyCount: number = 0
repostCount: number = 0
likeCount: number = 0
indexedAt: string = ''
constructor(reactKey: string, v: bsky.FeedView.FeedItem) {
makeAutoObservable(this)
this._reactKey = reactKey
Object.assign(this, v)
}
}
export class FeedViewModel implements bsky.FeedView.Response {
isLoading = false
isRefreshing = false
hasLoaded = false
error = ''
params: bsky.FeedView.Params
feed: FeedViewItemModel[] = []
_loadMorePromise: Promise<void> | undefined
constructor(public rootStore: RootStoreModel, params: bsky.FeedView.Params) {
makeAutoObservable(
this,
{
rootStore: false,
params: false,
_loadMorePromise: false,
},
{autoBind: true},
)
this.params = params
}
get hasContent() {
return this.feed.length !== 0
}
get hasError() {
return this.error !== ''
}
get isEmpty() {
return this.hasLoaded && !this.hasContent
}
get loadMoreCursor() {
if (this.hasContent) {
return this.feed[this.feed.length - 1].indexedAt
}
return undefined
}
// public api
// =
async setup() {
if (this._loadMorePromise) {
return this._loadMorePromise
}
if (this.hasContent) {
await this._refresh()
} else {
await this._initialLoad()
}
}
async refresh() {
if (this._loadMorePromise) {
return this._loadMorePromise
}
await this._refresh()
}
async loadMore() {
if (this._loadMorePromise) {
return this._loadMorePromise
}
this._loadMorePromise = this._loadMore()
await this._loadMorePromise
this._loadMorePromise = undefined
}
// state transitions
// =
private _xLoading(isRefreshing = false) {
this.isLoading = true
this.isRefreshing = isRefreshing
this.error = ''
}
private _xIdle(err: string = '') {
this.isLoading = false
this.isRefreshing = false
this.hasLoaded = true
this.error = err
}
// loader functions
// =
private async _initialLoad() {
this._xLoading()
await new Promise(r => setTimeout(r, 1e3)) // DEBUG
try {
const res = (await this.rootStore.api.mainPds.view(
'blueskyweb.xyz:FeedView',
this.params,
)) as bsky.FeedView.Response
this._replaceAll(res)
this._xIdle()
} catch (e: any) {
this._xIdle(`Failed to load feed: ${e.toString()}`)
}
}
private async _loadMore() {
this._xLoading()
await new Promise(r => setTimeout(r, 1e3)) // DEBUG
try {
const params = Object.assign({}, this.params, {
before: this.loadMoreCursor,
})
const res = (await this.rootStore.api.mainPds.view(
'blueskyweb.xyz:FeedView',
params,
)) as bsky.FeedView.Response
this._appendAll(res)
this._xIdle()
} catch (e: any) {
this._xIdle(`Failed to load feed: ${e.toString()}`)
}
}
private async _refresh() {
this._xLoading(true)
// TODO: refetch and update items
await new Promise(r => setTimeout(r, 1e3)) // DEBUG
this._xIdle()
}
private _replaceAll(res: bsky.FeedView.Response) {
this.feed.length = 0
let counter = 0
for (const item of res.feed) {
this._append(counter++, item)
}
}
private _appendAll(res: bsky.FeedView.Response) {
let counter = this.feed.length
for (const item of res.feed) {
this._append(counter++, item)
}
}
private _append(keyId: number, item: bsky.FeedView.FeedItem) {
// TODO: validate .record
this.feed.push(new FeedViewItemModel(`item-${keyId}`, item))
}
}
|
