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import {makeAutoObservable, runInAction} from 'mobx'
import {AtUri} from '../../third-party/uri'
import {AppBskyFeedGetRepostedBy as GetRepostedBy} from '@atproto/api'
import {RootStoreModel} from './root-store'
const PAGE_SIZE = 30
export type RepostedByItem = GetRepostedBy.RepostedBy
export class RepostedByViewModel {
// state
isLoading = false
isRefreshing = false
hasLoaded = false
error = ''
resolvedUri = ''
params: GetRepostedBy.QueryParams
hasMore = true
loadMoreCursor?: string
private _loadMorePromise: Promise<void> | undefined
// data
uri: string = ''
repostedBy: RepostedByItem[] = []
constructor(
public rootStore: RootStoreModel,
params: GetRepostedBy.QueryParams,
) {
makeAutoObservable(
this,
{
rootStore: false,
params: false,
},
{autoBind: true},
)
this.params = params
}
get hasContent() {
return this.uri !== ''
}
get hasError() {
return this.error !== ''
}
get isEmpty() {
return this.hasLoaded && !this.hasContent
}
// public api
// =
async refresh() {
return this.loadMore(true)
}
async loadMore(isRefreshing = false) {
if (this._loadMorePromise) {
return this._loadMorePromise
}
if (!this.resolvedUri) {
await this._resolveUri()
}
this._loadMorePromise = this._loadMore(isRefreshing)
await this._loadMorePromise
this._loadMorePromise = undefined
}
// state transitions
// =
private _xLoading(isRefreshing = false) {
this.isLoading = true
this.isRefreshing = isRefreshing
this.error = ''
}
private _xIdle(err?: any) {
this.isLoading = false
this.isRefreshing = false
this.hasLoaded = true
this.error = err ? err.toString() : ''
if (err) {
this.rootStore.log.error('Failed to fetch reposted by view', err)
}
}
// loader functions
// =
private async _resolveUri() {
const urip = new AtUri(this.params.uri)
if (!urip.host.startsWith('did:')) {
try {
urip.host = await this.rootStore.resolveName(urip.host)
} catch (e: any) {
this.error = e.toString()
}
}
runInAction(() => {
this.resolvedUri = urip.toString()
})
}
private async _loadMore(isRefreshing = false) {
this._xLoading(isRefreshing)
try {
const params = Object.assign({}, this.params, {
uri: this.resolvedUri,
limit: PAGE_SIZE,
before: this.loadMoreCursor,
})
if (this.isRefreshing) {
this.repostedBy = []
}
const res = await this.rootStore.api.app.bsky.feed.getRepostedBy(params)
await this._appendAll(res)
this._xIdle()
} catch (e: any) {
this._xIdle(e)
}
}
private _appendAll(res: GetRepostedBy.Response) {
this.loadMoreCursor = res.data.cursor
this.hasMore = !!this.loadMoreCursor
this.repostedBy = this.repostedBy.concat(res.data.repostedBy)
}
}
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