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import {makeAutoObservable} from 'mobx'
import {RootStoreModel} from '../root-store'
import {ProfileViewModel} from '../profile-view'
import {FeedModel} from '../feed-view'
export enum Sections {
Posts = 'Posts',
PostsWithReplies = 'Posts & replies',
}
const USER_SELECTOR_ITEMS = [Sections.Posts, Sections.PostsWithReplies]
export interface ProfileUiParams {
user: string
}
export class ProfileUiModel {
static LOADING_ITEM = {_reactKey: '__loading__'}
static END_ITEM = {_reactKey: '__end__'}
static EMPTY_ITEM = {_reactKey: '__empty__'}
// data
profile: ProfileViewModel
feed: FeedModel
// ui state
selectedViewIndex = 0
constructor(
public rootStore: RootStoreModel,
public params: ProfileUiParams,
) {
makeAutoObservable(
this,
{
rootStore: false,
params: false,
},
{autoBind: true},
)
this.profile = new ProfileViewModel(rootStore, {actor: params.user})
this.feed = new FeedModel(rootStore, 'author', {
actor: params.user,
limit: 10,
})
}
get currentView(): FeedModel {
if (
this.selectedView === Sections.Posts ||
this.selectedView === Sections.PostsWithReplies
) {
return this.feed
}
throw new Error(`Invalid selector value: ${this.selectedViewIndex}`)
}
get isInitialLoading() {
const view = this.currentView
return view.isLoading && !view.isRefreshing && !view.hasContent
}
get isRefreshing() {
return this.profile.isRefreshing || this.currentView.isRefreshing
}
get selectorItems() {
return USER_SELECTOR_ITEMS
}
get selectedView() {
return this.selectorItems[this.selectedViewIndex]
}
get uiItems() {
let arr: any[] = []
if (this.isInitialLoading) {
arr = arr.concat([ProfileUiModel.LOADING_ITEM])
} else if (this.currentView.hasError) {
arr = arr.concat([
{
_reactKey: '__error__',
error: this.currentView.error,
},
])
} else {
if (
this.selectedView === Sections.Posts ||
this.selectedView === Sections.PostsWithReplies
) {
if (this.feed.hasContent) {
if (this.selectedView === Sections.Posts) {
arr = this.feed.nonReplyFeed
} else {
arr = this.feed.slices.slice()
}
if (!this.feed.hasMore) {
arr = arr.concat([ProfileUiModel.END_ITEM])
}
} else if (this.feed.isEmpty) {
arr = arr.concat([ProfileUiModel.EMPTY_ITEM])
}
} else {
arr = arr.concat([ProfileUiModel.EMPTY_ITEM])
}
}
return arr
}
get showLoadingMoreFooter() {
if (
this.selectedView === Sections.Posts ||
this.selectedView === Sections.PostsWithReplies
) {
return this.feed.hasContent && this.feed.hasMore && this.feed.isLoading
}
return false
}
// public api
// =
setSelectedViewIndex(index: number) {
this.selectedViewIndex = index
}
async setup() {
await Promise.all([
this.profile
.setup()
.catch(err => this.rootStore.log.error('Failed to fetch profile', err)),
this.feed
.setup()
.catch(err => this.rootStore.log.error('Failed to fetch feed', err)),
])
}
async update() {
const view = this.currentView
if (view instanceof FeedModel) {
await view.update()
}
}
async refresh() {
await Promise.all([this.profile.refresh(), this.currentView.refresh()])
}
async loadMore() {
if (
!this.currentView.isLoading &&
!this.currentView.hasError &&
!this.currentView.isEmpty
) {
await this.currentView.loadMore()
}
}
}
|
