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import { forkJoin, Observable } from 'rxjs'
import { map, switchMap } from 'rxjs/operators'
import { Injectable } from '@angular/core'
import { ServerService } from '@app/core'
import { CustomMarkupService } from '@app/shared/shared-custom-markup'
import { AboutHTML, InstanceService } from '@app/shared/shared-instance'
import { About, ServerStats } from '@shared/models/server'
export type ResolverData = {
serverStats: ServerStats
about: About
languages: string[]
categories: string[]
aboutHTML: AboutHTML
descriptionElement: HTMLDivElement
}
@Injectable()
export class AboutInstanceResolver {
constructor (
private instanceService: InstanceService,
private customMarkupService: CustomMarkupService,
private serverService: ServerService
) {}
resolve (): Observable<ResolverData> {
return forkJoin([
this.buildInstanceAboutObservable(),
this.buildInstanceStatsObservable()
]).pipe(
map(([
[ about, languages, categories, aboutHTML, { rootElement } ],
serverStats
]) => {
return {
serverStats,
about,
languages,
categories,
aboutHTML,
descriptionElement: rootElement
}
})
)
}
private buildInstanceAboutObservable () {
return this.instanceService.getAbout()
.pipe(
switchMap(about => {
return forkJoin([
Promise.resolve(about),
this.instanceService.buildTranslatedLanguages(about),
this.instanceService.buildTranslatedCategories(about),
this.instanceService.buildHtml(about),
this.customMarkupService.buildElement(about.instance.description)
])
})
)
}
private buildInstanceStatsObservable () {
return this.serverService.getServerStats()
}
}
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