Add auto scroll to videos list

5 files changed, 61 insertions, 22 deletions

diff --git a/client/src/app/videos/video-list/shared/abstract-video-list.html b/client/src/app/videos/video-list/shared/abstract-video-list.html
index ab5530e68..69e16319e 100644
--- a/client/src/app/videos/video-list/shared/abstract-video-list.html
+++ b/client/src/app/videos/video-list/shared/abstract-video-list.html
@@ -2,15 +2,17 @@
   {{ titlePage }}
 </div>
 
-<div class="videos-miniatures">
+<div
+  class="videos-miniatures"
+  infiniteScroll
+  [infiniteScrollUpDistance]="1.5"
+  [infiniteScrollDistance]="0.5"
+  (scrolled)="onNearOfBottom()"
+  (scrolledUp)="onNearOfTop()"
+>
   <my-video-miniature
     class="ng-animate"
     *ngFor="let video of videos" [video]="video" [user]="user" [currentSort]="sort"
   >
   </my-video-miniature>
 </div>
-
-<pagination *ngIf="pagination.totalItems !== null && pagination.totalItems !== 0"
-  [totalItems]="pagination.totalItems" [itemsPerPage]="pagination.itemsPerPage" [maxSize]="6" [boundaryLinks]="true" [rotate]="false"
-  [(ngModel)]="pagination.currentPage" (pageChanged)="onPageChanged($event)"
-></pagination>
diff --git a/client/src/app/videos/video-list/shared/abstract-video-list.ts b/client/src/app/videos/video-list/shared/abstract-video-list.ts
index 262ea4e21..44cdc1d9f 100644
--- a/client/src/app/videos/video-list/shared/abstract-video-list.ts
+++ b/client/src/app/videos/video-list/shared/abstract-video-list.ts
@@ -19,44 +19,77 @@ export abstract class AbstractVideoList implements OnInit, OnDestroy {
   protected notificationsService: NotificationsService
   protected router: Router
   protected route: ActivatedRoute
-
   protected subActivatedRoute: Subscription
 
+  protected abstract currentRoute: string
+
   abstract titlePage: string
+  private loadedPages: { [ id: number ]: boolean } = {}
+
   abstract getVideosObservable (): Observable<{ videos: Video[], totalVideos: number}>
 
   ngOnInit () {
     // Subscribe to route changes
-    this.subActivatedRoute = this.route.params.subscribe(routeParams => {
-      this.loadRouteParams(routeParams)
-
-      this.getVideos()
-    })
+    const routeParams = this.route.snapshot.params
+    this.loadRouteParams(routeParams)
+    this.loadMoreVideos('after')
   }
 
   ngOnDestroy () {
     this.subActivatedRoute.unsubscribe()
   }
 
-  getVideos () {
-    this.videos = []
+  onNearOfTop () {
+    if (this.pagination.currentPage > 1) {
+      this.previousPage()
+    }
+  }
+
+  onNearOfBottom () {
+    if (this.hasMoreVideos()) {
+      this.nextPage()
+    }
+  }
+
+  loadMoreVideos (where: 'before' | 'after') {
+    if (this.loadedPages[this.pagination.currentPage] === true) return
 
     const observable = this.getVideosObservable()
 
     observable.subscribe(
       ({ videos, totalVideos }) => {
-        this.videos = videos
+        this.loadedPages[this.pagination.currentPage] = true
         this.pagination.totalItems = totalVideos
+
+        if (where === 'before') {
+          this.videos = videos.concat(this.videos)
+        } else {
+          this.videos = this.videos.concat(videos)
+        }
       },
       error => this.notificationsService.error('Error', error.text)
     )
   }
 
-  onPageChanged (event: { page: number }) {
-    // Be sure the current page is set
-    this.pagination.currentPage = event.page
+  protected hasMoreVideos () {
+    if (!this.pagination.totalItems) return true
+
+    const maxPage = this.pagination.totalItems/this.pagination.itemsPerPage
+    return maxPage > this.pagination.currentPage
+  }
+
+  protected previousPage () {
+    this.pagination.currentPage--
+
+    this.setNewRouteParams()
+    this.loadMoreVideos('before')
+  }
+
+  protected nextPage () {
+    this.pagination.currentPage++
 
-    this.navigateToNewParams()
+    this.setNewRouteParams()
+    this.loadMoreVideos('after')
   }
 
   protected buildRouteParams () {
@@ -79,8 +112,8 @@ export abstract class AbstractVideoList implements OnInit, OnDestroy {
     }
   }
 
-  protected navigateToNewParams () {
+  protected setNewRouteParams () {
     const routeParams = this.buildRouteParams()
-    this.router.navigate([ '/videos/list', routeParams ])
+    this.router.navigate([ this.currentRoute, routeParams ])
   }
 }
diff --git a/client/src/app/videos/video-list/video-recently-added.component.ts b/client/src/app/videos/video-list/video-recently-added.component.ts
index dbba264df..9bf69bd78 100644
--- a/client/src/app/videos/video-list/video-recently-added.component.ts
+++ b/client/src/app/videos/video-list/video-recently-added.component.ts
@@ -11,6 +11,7 @@ import { AbstractVideoList } from './shared'
 })
 export class VideoRecentlyAddedComponent extends AbstractVideoList implements OnInit, OnDestroy {
   titlePage = 'Recently added'
+  currentRoute = '/videos/recently-added'
 
   constructor (protected router: Router,
                protected route: ActivatedRoute,
diff --git a/client/src/app/videos/video-list/video-trending.component.ts b/client/src/app/videos/video-list/video-trending.component.ts
index b97966c12..a1df68711 100644
--- a/client/src/app/videos/video-list/video-trending.component.ts
+++ b/client/src/app/videos/video-list/video-trending.component.ts
@@ -11,6 +11,7 @@ import { AbstractVideoList } from './shared'
 })
 export class VideoTrendingComponent extends AbstractVideoList implements OnInit, OnDestroy {
   titlePage = 'Trending'
+  currentRoute = '/videos/trending'
 
   constructor (protected router: Router,
                protected route: ActivatedRoute,
diff --git a/client/src/app/videos/videos.module.ts b/client/src/app/videos/videos.module.ts
index 93193000c..f3981d275 100644
--- a/client/src/app/videos/videos.module.ts
+++ b/client/src/app/videos/videos.module.ts
@@ -1,4 +1,5 @@
 import { NgModule } from '@angular/core'
+import { InfiniteScrollModule } from 'ngx-infinite-scroll'
 import { SharedModule } from '../shared'
 import { VideoService } from './shared'
 import { MyVideosComponent, VideoMiniatureComponent } from './video-list'
@@ -10,7 +11,8 @@ import { VideosComponent } from './videos.component'
 @NgModule({
   imports: [
     VideosRoutingModule,
-    SharedModule
+    SharedModule,
+    InfiniteScrollModule
   ],
 
   declarations: [