3 files changed, 96 insertions, 0 deletions

diff --git a/client/src/app/shared/overview/index.ts b/client/src/app/shared/overview/index.ts
new file mode 100644
index 000000000..2f7e41298
--- /dev/null
+++ b/client/src/app/shared/overview/index.ts
@@ -0,0 +1 @@
+export * from './overview.service'
diff --git a/client/src/app/shared/overview/overview.service.ts b/client/src/app/shared/overview/overview.service.ts
new file mode 100644
index 000000000..4a4714af6
--- /dev/null
+++ b/client/src/app/shared/overview/overview.service.ts
@@ -0,0 +1,76 @@
+import { catchError, map, switchMap, tap } from 'rxjs/operators'
+import { HttpClient } from '@angular/common/http'
+import { Injectable } from '@angular/core'
+import { forkJoin, Observable, of } from 'rxjs'
+import { VideosOverview as VideosOverviewServer, peertubeTranslate } from '../../../../../shared/models'
+import { environment } from '../../../environments/environment'
+import { RestExtractor } from '../rest/rest-extractor.service'
+import { RestService } from '../rest/rest.service'
+import { VideosOverview } from '@app/shared/overview/videos-overview.model'
+import { VideoService } from '@app/shared/video/video.service'
+import { ServerService } from '@app/core'
+import { immutableAssign } from '@app/shared/misc/utils'
+
+@Injectable()
+export class OverviewService {
+  static BASE_OVERVIEW_URL = environment.apiUrl + '/api/v1/overviews/'
+
+  constructor (
+    private authHttp: HttpClient,
+    private restExtractor: RestExtractor,
+    private restService: RestService,
+    private videosService: VideoService,
+    private serverService: ServerService
+  ) {}
+
+  getVideosOverview (): Observable<VideosOverview> {
+    return this.authHttp
+               .get<VideosOverviewServer>(OverviewService.BASE_OVERVIEW_URL + 'videos')
+               .pipe(
+                 switchMap(serverVideosOverview => this.updateVideosOverview(serverVideosOverview)),
+                 catchError(err => this.restExtractor.handleError(err))
+               )
+  }
+
+  private updateVideosOverview (serverVideosOverview: VideosOverviewServer): Observable<VideosOverview> {
+    const observables: Observable<any>[] = []
+    const videosOverviewResult: VideosOverview = {
+      tags: [],
+      categories: [],
+      channels: []
+    }
+
+    // Build videos objects
+    for (const key of Object.keys(serverVideosOverview)) {
+      for (const object of serverVideosOverview[ key ]) {
+        observables.push(
+          of(object.videos)
+            .pipe(
+              switchMap(videos => this.videosService.extractVideos({ total: 0, data: videos })),
+              map(result => result.videos),
+              tap(videos => {
+                videosOverviewResult[key].push(immutableAssign(object, { videos }))
+              })
+            )
+        )
+      }
+    }
+
+    return forkJoin(observables)
+      .pipe(
+        // Translate categories
+        switchMap(() => {
+          return this.serverService.localeObservable
+              .pipe(
+                tap(translations => {
+                  for (const c of videosOverviewResult.categories) {
+                    c.category.label = peertubeTranslate(c.category.label, translations)
+                  }
+                })
+              )
+        }),
+        map(() => videosOverviewResult)
+      )
+  }
+
+}
diff --git a/client/src/app/shared/overview/videos-overview.model.ts b/client/src/app/shared/overview/videos-overview.model.ts
new file mode 100644
index 000000000..cf02bdb3d
--- /dev/null
+++ b/client/src/app/shared/overview/videos-overview.model.ts
@@ -0,0 +1,19 @@
+import { VideoChannelAttribute, VideoConstant, VideosOverview as VideosOverviewServer } from '../../../../../shared/models'
+import { Video } from '@app/shared/video/video.model'
+
+export class VideosOverview implements VideosOverviewServer {
+  channels: {
+    channel: VideoChannelAttribute
+    videos: Video[]
+  }[]
+
+  categories: {
+    category: VideoConstant<number>
+    videos: Video[]
+  }[]
+
+  tags: {
+    tag: string
+    videos: Video[]
+  }[]
+}