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import {makeAutoObservable, runInAction} from 'mobx'
import {bsky, AdxUri} from '@adxp/mock-api'
import _omit from 'lodash.omit'
import {RootStoreModel} from './root-store'
function* reactKeyGenerator(): Generator<string> {
let counter = 0
while (true) {
yield `item-${counter++}`
}
}
export class PostThreadViewPostModel implements bsky.PostThreadView.Post {
// ui state
_reactKey: string = ''
_depth = 0
_isHighlightedPost = false
// data
uri: string = ''
author: bsky.PostThreadView.User = {did: '', name: '', displayName: ''}
record: Record<string, unknown> = {}
embed?:
| bsky.PostThreadView.RecordEmbed
| bsky.PostThreadView.ExternalEmbed
| bsky.PostThreadView.UnknownEmbed
parent?: PostThreadViewPostModel
replyCount: number = 0
replies?: PostThreadViewPostModel[]
repostCount: number = 0
likeCount: number = 0
indexedAt: string = ''
constructor(reactKey: string, v?: bsky.PostThreadView.Post) {
makeAutoObservable(this)
this._reactKey = reactKey
if (v) {
Object.assign(this, _omit(v, 'parent', 'replies')) // copy everything but the replies and the parent
}
}
assignTreeModels(keyGen: Generator<string>, v: bsky.PostThreadView.Post) {
// parents
if (v.parent) {
// TODO: validate .record
const parentModel = new PostThreadViewPostModel(
keyGen.next().value,
v.parent,
)
parentModel._depth = this._depth - 1
if (v.parent.parent) {
parentModel.assignTreeModels(keyGen, v.parent)
}
this.parent = parentModel
}
// replies
if (v.replies) {
const replies = []
for (const item of v.replies) {
// TODO: validate .record
const itemModel = new PostThreadViewPostModel(keyGen.next().value, item)
itemModel._depth = this._depth + 1
if (item.replies) {
itemModel.assignTreeModels(keyGen, item)
}
replies.push(itemModel)
}
this.replies = replies
}
}
}
const UNLOADED_THREAD = new PostThreadViewPostModel('')
export class PostThreadViewModel implements bsky.PostThreadView.Response {
isLoading = false
isRefreshing = false
hasLoaded = false
error = ''
resolvedUri = ''
params: bsky.PostThreadView.Params
thread: PostThreadViewPostModel = UNLOADED_THREAD
constructor(
public rootStore: RootStoreModel,
params: bsky.PostThreadView.Params,
) {
makeAutoObservable(
this,
{
rootStore: false,
params: false,
},
{autoBind: true},
)
this.params = params
}
get hasContent() {
return this.thread !== UNLOADED_THREAD
}
get hasError() {
return this.error !== ''
}
// public api
// =
async setup() {
if (!this.resolvedUri) {
await this._resolveUri()
}
if (this.hasContent) {
await this._refresh()
} else {
await this._initialLoad()
}
}
async refresh() {
await this._refresh()
}
// 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 _resolveUri() {
const urip = new AdxUri(this.params.uri)
if (!urip.host.startsWith('did:')) {
urip.host = await this.rootStore.resolveName(urip.host)
}
runInAction(() => {
this.resolvedUri = urip.toString()
})
}
private async _initialLoad() {
this._xLoading()
try {
const res = (await this.rootStore.api.mainPds.view(
'blueskyweb.xyz:PostThreadView',
Object.assign({}, this.params, {uri: this.resolvedUri}),
)) as bsky.PostThreadView.Response
this._replaceAll(res)
this._xIdle()
} catch (e: any) {
this._xIdle(`Failed to load thread: ${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.PostThreadView.Response) {
// TODO: validate .record
const keyGen = reactKeyGenerator()
const thread = new PostThreadViewPostModel(keyGen.next().value, res.thread)
thread._isHighlightedPost = true
thread.assignTreeModels(keyGen, res.thread)
this.thread = thread
}
}
|
