Fetch things in bulk for the homepage

14 files changed, 213 insertions, 52 deletions

diff --git a/client/src/app/core/rest/rest.service.ts b/client/src/app/core/rest/rest.service.ts
index 1696e6709..98e45ffc0 100644
--- a/client/src/app/core/rest/rest.service.ts
+++ b/client/src/app/core/rest/rest.service.ts
@@ -44,13 +44,21 @@ export class RestService {
     return newParams
   }
 
+  addArrayParams (params: HttpParams, name: string, values: (string | number)[]) {
+    for (const v of values) {
+      params = params.append(name, v)
+    }
+
+    return params
+  }
+
   addObjectParams (params: HttpParams, object: { [ name: string ]: any }) {
     for (const name of Object.keys(object)) {
       const value = object[name]
       if (value === undefined || value === null) continue
 
       if (Array.isArray(value)) {
-        for (const v of value) params = params.append(name, v)
+        params = this.addArrayParams(params, name, value)
       } else {
         params = params.append(name, value)
       }
diff --git a/client/src/app/helpers/index.ts b/client/src/app/helpers/index.ts
index cc61255ba..beff749ec 100644
--- a/client/src/app/helpers/index.ts
+++ b/client/src/app/helpers/index.ts
@@ -1,5 +1,6 @@
 export * from './locales'
 export * from './constants'
 export * from './i18n-utils'
+export * from './rxjs'
 export * from './utils'
 export * from './zone'
diff --git a/client/src/app/helpers/rxjs.ts b/client/src/app/helpers/rxjs.ts
new file mode 100644
index 000000000..eb051f868
--- /dev/null
+++ b/client/src/app/helpers/rxjs.ts
@@ -0,0 +1,29 @@
+import { uniq } from 'lodash-es'
+import { asyncScheduler, Observable } from 'rxjs'
+import { bufferTime, distinctUntilChanged, filter, map, observeOn, share, switchMap } from 'rxjs/operators'
+import { NgZone } from '@angular/core'
+import { enterZone, leaveZone } from './zone'
+
+function buildBulkObservable <T extends number | string, R> (options: {
+  ngZone: NgZone
+  notifierObservable: Observable<T>
+  time: number
+  bulkGet: (params: T[]) => Observable<R>
+}) {
+  const { ngZone, notifierObservable, time, bulkGet } = options
+
+  return notifierObservable.pipe(
+    distinctUntilChanged(),
+    // We leave Angular zone so Protractor does not get stuck
+    bufferTime(time, leaveZone(ngZone, asyncScheduler)),
+    filter(params => params.length !== 0),
+    map(params => uniq(params)),
+    observeOn(enterZone(ngZone, asyncScheduler)),
+    switchMap(params => bulkGet(params)),
+    share()
+  )
+}
+
+export {
+  buildBulkObservable
+}
diff --git a/client/src/app/shared/shared-custom-markup/custom-markup.service.ts b/client/src/app/shared/shared-custom-markup/custom-markup.service.ts
index 231e52d0a..089728a51 100644
--- a/client/src/app/shared/shared-custom-markup/custom-markup.service.ts
+++ b/client/src/app/shared/shared-custom-markup/custom-markup.service.ts
@@ -65,15 +65,15 @@ export class CustomMarkupService {
 
     for (const selector of Object.keys(this.htmlBuilders)) {
       rootElement.querySelectorAll(selector)
-      .forEach((e: HTMLElement) => {
-        try {
-          const element = this.execHTMLBuilder(selector, e)
-          // Insert as first child
-          e.insertBefore(element, e.firstChild)
-        } catch (err) {
-          console.error('Cannot inject component %s.', selector, err)
-        }
-      })
+        .forEach((e: HTMLElement) => {
+          try {
+            const element = this.execHTMLBuilder(selector, e)
+            // Insert as first child
+            e.insertBefore(element, e.firstChild)
+          } catch (err) {
+            console.error('Cannot inject component %s.', selector, err)
+          }
+        })
     }
 
     const loadedPromises: Promise<boolean>[] = []
diff --git a/client/src/app/shared/shared-custom-markup/peertube-custom-tags/channel-miniature-markup.component.ts b/client/src/app/shared/shared-custom-markup/peertube-custom-tags/channel-miniature-markup.component.ts
index 7043a7ec9..bb099deae 100644
--- a/client/src/app/shared/shared-custom-markup/peertube-custom-tags/channel-miniature-markup.component.ts
+++ b/client/src/app/shared/shared-custom-markup/peertube-custom-tags/channel-miniature-markup.component.ts
@@ -2,8 +2,9 @@ import { from } from 'rxjs'
 import { finalize, map, switchMap, tap } from 'rxjs/operators'
 import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core'
 import { MarkdownService, Notifier, UserService } from '@app/core'
+import { FindInBulkService } from '@app/shared/shared-search'
 import { Video, VideoSortField } from '@shared/models/videos'
-import { VideoChannel, VideoChannelService, VideoService } from '../../shared-main'
+import { VideoChannel, VideoService } from '../../shared-main'
 import { CustomMarkupComponent } from './shared'
 
 /*
@@ -29,14 +30,14 @@ export class ChannelMiniatureMarkupComponent implements CustomMarkupComponent, O
 
   constructor (
     private markdown: MarkdownService,
-    private channelService: VideoChannelService,
+    private findInBulk: FindInBulkService,
     private videoService: VideoService,
     private userService: UserService,
     private notifier: Notifier
   ) { }
 
   ngOnInit () {
-    this.channelService.getVideoChannel(this.name)
+    this.findInBulk.getChannel(this.name)
       .pipe(
         tap(channel => this.channel = channel),
         switchMap(() => from(this.markdown.textMarkdownToHTML(this.channel.description))),
diff --git a/client/src/app/shared/shared-custom-markup/peertube-custom-tags/playlist-miniature-markup.component.ts b/client/src/app/shared/shared-custom-markup/peertube-custom-tags/playlist-miniature-markup.component.ts
index ff8cc01db..97d31c4a7 100644
--- a/client/src/app/shared/shared-custom-markup/peertube-custom-tags/playlist-miniature-markup.component.ts
+++ b/client/src/app/shared/shared-custom-markup/peertube-custom-tags/playlist-miniature-markup.component.ts
@@ -1,8 +1,9 @@
 import { finalize } from 'rxjs/operators'
 import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core'
 import { Notifier } from '@app/core'
+import { FindInBulkService } from '@app/shared/shared-search'
 import { MiniatureDisplayOptions } from '../../shared-video-miniature'
-import { VideoPlaylist, VideoPlaylistService } from '../../shared-video-playlist'
+import { VideoPlaylist } from '../../shared-video-playlist'
 import { CustomMarkupComponent } from './shared'
 
 /*
@@ -33,12 +34,12 @@ export class PlaylistMiniatureMarkupComponent implements CustomMarkupComponent,
   }
 
   constructor (
-    private playlistService: VideoPlaylistService,
+    private findInBulkService: FindInBulkService,
     private notifier: Notifier
   ) { }
 
   ngOnInit () {
-    this.playlistService.getVideoPlaylist(this.uuid)
+    this.findInBulkService.getPlaylist(this.uuid)
       .pipe(finalize(() => this.loaded.emit(true)))
       .subscribe(
         playlist => this.playlist = playlist,
diff --git a/client/src/app/shared/shared-custom-markup/peertube-custom-tags/video-miniature-markup.component.ts b/client/src/app/shared/shared-custom-markup/peertube-custom-tags/video-miniature-markup.component.ts
index 47518abfd..ba61aaf51 100644
--- a/client/src/app/shared/shared-custom-markup/peertube-custom-tags/video-miniature-markup.component.ts
+++ b/client/src/app/shared/shared-custom-markup/peertube-custom-tags/video-miniature-markup.component.ts
@@ -4,6 +4,7 @@ import { AuthService, Notifier } from '@app/core'
 import { Video, VideoService } from '../../shared-main'
 import { MiniatureDisplayOptions } from '../../shared-video-miniature'
 import { CustomMarkupComponent } from './shared'
+import { FindInBulkService } from '@app/shared/shared-search'
 
 /*
  * Markup component that creates a video miniature only
@@ -35,7 +36,7 @@ export class VideoMiniatureMarkupComponent implements CustomMarkupComponent, OnI
 
   constructor (
     private auth: AuthService,
-    private videoService: VideoService,
+    private findInBulk: FindInBulkService,
     private notifier: Notifier
   ) { }
 
@@ -50,7 +51,7 @@ export class VideoMiniatureMarkupComponent implements CustomMarkupComponent, OnI
       }
     }
 
-    this.videoService.getVideo({ videoId: this.uuid })
+    this.findInBulk.getVideo(this.uuid)
       .pipe(finalize(() => this.loaded.emit(true)))
       .subscribe(
         video => this.video = video,
diff --git a/client/src/app/shared/shared-custom-markup/shared-custom-markup.module.ts b/client/src/app/shared/shared-custom-markup/shared-custom-markup.module.ts
index dccd64709..27e976d13 100644
--- a/client/src/app/shared/shared-custom-markup/shared-custom-markup.module.ts
+++ b/client/src/app/shared/shared-custom-markup/shared-custom-markup.module.ts
@@ -3,6 +3,7 @@ import { NgModule } from '@angular/core'
 import { SharedActorImageModule } from '../shared-actor-image/shared-actor-image.module'
 import { SharedGlobalIconModule } from '../shared-icons'
 import { SharedMainModule } from '../shared-main'
+import { SharedSearchModule } from '../shared-search'
 import { SharedVideoMiniatureModule } from '../shared-video-miniature'
 import { SharedVideoPlaylistModule } from '../shared-video-playlist'
 import { CustomMarkupContainerComponent } from './custom-markup-container.component'
@@ -26,7 +27,8 @@ import {
     SharedGlobalIconModule,
     SharedVideoMiniatureModule,
     SharedVideoPlaylistModule,
-    SharedActorImageModule
+    SharedActorImageModule,
+    SharedSearchModule
   ],
 
   declarations: [
diff --git a/client/src/app/shared/shared-search/find-in-bulk.service.ts b/client/src/app/shared/shared-search/find-in-bulk.service.ts
new file mode 100644
index 000000000..0383d8648
--- /dev/null
+++ b/client/src/app/shared/shared-search/find-in-bulk.service.ts
@@ -0,0 +1,118 @@
+import * as debug from 'debug'
+import { Observable, Subject } from 'rxjs'
+import { map } from 'rxjs/operators'
+import { Injectable, NgZone } from '@angular/core'
+import { buildBulkObservable } from '@app/helpers'
+import { ResultList } from '@shared/models/common'
+import { Video, VideoChannel } from '../shared-main'
+import { VideoPlaylist } from '../shared-video-playlist'
+import { SearchService } from './search.service'
+
+const logger = debug('peertube:search:FindInBulkService')
+
+type BulkObservables <P extends number | string, R> = {
+  notifier: Subject<P>
+  result: Observable<R>
+}
+
+@Injectable()
+export class FindInBulkService {
+
+  private getVideoInBulk: BulkObservables<string, ResultList<Video>>
+  private getChannelInBulk: BulkObservables<string, ResultList<VideoChannel>>
+  private getPlaylistInBulk: BulkObservables<string, ResultList<VideoPlaylist>>
+
+  constructor (
+    private searchService: SearchService,
+    private ngZone: NgZone
+  ) {
+    this.getVideoInBulk = this.buildBulkObservableObject(this.getVideosInBulk.bind(this))
+    this.getChannelInBulk = this.buildBulkObservableObject(this.getChannelsInBulk.bind(this))
+    this.getPlaylistInBulk = this.buildBulkObservableObject(this.getPlaylistsInBulk.bind(this))
+  }
+
+  getVideo (uuid: string): Observable<Video> {
+    logger('Schedule video fetch for uuid %s.', uuid)
+
+    return this.getData({
+      observableObject: this.getVideoInBulk,
+      finder: v => v.uuid === uuid,
+      param: uuid
+    })
+  }
+
+  getChannel (handle: string): Observable<VideoChannel> {
+    logger('Schedule channel fetch for handle %s.', handle)
+
+    return this.getData({
+      observableObject: this.getChannelInBulk,
+      finder: c => c.nameWithHost === handle || c.nameWithHostForced === handle,
+      param: handle
+    })
+  }
+
+  getPlaylist (uuid: string): Observable<VideoPlaylist> {
+    logger('Schedule playlist fetch for uuid %s.', uuid)
+
+    return this.getData({
+      observableObject: this.getPlaylistInBulk,
+      finder: p => p.uuid === uuid,
+      param: uuid
+    })
+  }
+
+  private getData <P extends number | string, R> (options: {
+    observableObject: BulkObservables<P, ResultList<R>>
+    param: P
+    finder: (d: R) => boolean
+  }) {
+    const { observableObject, param, finder } = options
+
+    return new Observable<R>(obs => {
+      observableObject.result
+        .pipe(
+          map(({ data }) => data),
+          map(data => data.find(finder))
+        )
+        .subscribe(result => {
+          obs.next(result)
+          obs.complete()
+        })
+
+      observableObject.notifier.next(param)
+    })
+  }
+
+  private getVideosInBulk (uuids: string[]) {
+    logger('Fetching videos %s.', uuids.join(', '))
+
+    return this.searchService.searchVideos({ uuids })
+  }
+
+  private getChannelsInBulk (handles: string[]) {
+    logger('Fetching channels %s.', handles.join(', '))
+
+    return this.searchService.searchVideoChannels({ handles })
+  }
+
+  private getPlaylistsInBulk (uuids: string[]) {
+    logger('Fetching playlists %s.', uuids.join(', '))
+
+    return this.searchService.searchVideoPlaylists({ uuids })
+  }
+
+  private buildBulkObservableObject <T extends number | string, R> (bulkGet: (params: T[]) => Observable<R>) {
+    const notifier = new Subject<T>()
+
+    return {
+      notifier,
+
+      result: buildBulkObservable({
+        time: 500,
+        bulkGet,
+        ngZone: this.ngZone,
+        notifierObservable: notifier.asObservable()
+      })
+    }
+  }
+}
diff --git a/client/src/app/shared/shared-search/index.ts b/client/src/app/shared/shared-search/index.ts
index f687f6767..0235893c4 100644
--- a/client/src/app/shared/shared-search/index.ts
+++ b/client/src/app/shared/shared-search/index.ts
@@ -1,3 +1,4 @@
 export * from './advanced-search.model'
+export * from './find-in-bulk.service'
 export * from './search.service'
 export * from './shared-search.module'
diff --git a/client/src/app/shared/shared-search/search.service.ts b/client/src/app/shared/shared-search/search.service.ts
index a1603da98..fdfab0e0e 100644
--- a/client/src/app/shared/shared-search/search.service.ts
+++ b/client/src/app/shared/shared-search/search.service.ts
@@ -32,11 +32,12 @@ export class SearchService {
   }
 
   searchVideos (parameters: {
-    search: string
+    search?: string
     componentPagination?: ComponentPaginationLight
     advancedSearch?: AdvancedSearch
+    uuids?: string[]
   }): Observable<ResultList<Video>> {
-    const { search, componentPagination, advancedSearch } = parameters
+    const { search, uuids, componentPagination, advancedSearch } = parameters
 
     const url = SearchService.BASE_SEARCH_URL + 'videos'
     let pagination: RestPagination
@@ -49,6 +50,7 @@ export class SearchService {
     params = this.restService.addRestGetParams(params, pagination)
 
     if (search) params = params.append('search', search)
+    if (uuids) params = this.restService.addArrayParams(params, 'uuids', uuids)
 
     if (advancedSearch) {
       const advancedSearchObject = advancedSearch.toVideosAPIObject()
@@ -64,11 +66,12 @@ export class SearchService {
   }
 
   searchVideoChannels (parameters: {
-    search: string
+    search?: string
     advancedSearch?: AdvancedSearch
     componentPagination?: ComponentPaginationLight
+    handles?: string[]
   }): Observable<ResultList<VideoChannel>> {
-    const { search, advancedSearch, componentPagination } = parameters
+    const { search, advancedSearch, componentPagination, handles } = parameters
 
     const url = SearchService.BASE_SEARCH_URL + 'video-channels'
 
@@ -81,6 +84,7 @@ export class SearchService {
     params = this.restService.addRestGetParams(params, pagination)
 
     if (search) params = params.append('search', search)
+    if (handles) params = this.restService.addArrayParams(params, 'handles', handles)
 
     if (advancedSearch) {
       const advancedSearchObject = advancedSearch.toChannelAPIObject()
@@ -96,11 +100,12 @@ export class SearchService {
   }
 
   searchVideoPlaylists (parameters: {
-    search: string
+    search?: string
     advancedSearch?: AdvancedSearch
     componentPagination?: ComponentPaginationLight
+    uuids?: string[]
   }): Observable<ResultList<VideoPlaylist>> {
-    const { search, advancedSearch, componentPagination } = parameters
+    const { search, advancedSearch, componentPagination, uuids } = parameters
 
     const url = SearchService.BASE_SEARCH_URL + 'video-playlists'
 
@@ -113,6 +118,7 @@ export class SearchService {
     params = this.restService.addRestGetParams(params, pagination)
 
     if (search) params = params.append('search', search)
+    if (uuids) params = this.restService.addArrayParams(params, 'uuids', uuids)
 
     if (advancedSearch) {
       const advancedSearchObject = advancedSearch.toPlaylistAPIObject()
diff --git a/client/src/app/shared/shared-search/shared-search.module.ts b/client/src/app/shared/shared-search/shared-search.module.ts
index be4ef5e3f..8b5492400 100644
--- a/client/src/app/shared/shared-search/shared-search.module.ts
+++ b/client/src/app/shared/shared-search/shared-search.module.ts
@@ -1,6 +1,7 @@
 import { NgModule } from '@angular/core'
 import { SharedMainModule } from '../shared-main'
 import { SharedVideoPlaylistModule } from '../shared-video-playlist'
+import { FindInBulkService } from './find-in-bulk.service'
 import { SearchService } from './search.service'
 
 @NgModule({
@@ -16,6 +17,7 @@ import { SearchService } from './search.service'
   ],
 
   providers: [
+    FindInBulkService,
     SearchService
   ]
 })
diff --git a/client/src/app/shared/shared-user-subscription/user-subscription.service.ts b/client/src/app/shared/shared-user-subscription/user-subscription.service.ts
index eb1fdf91c..bb44660d2 100644
--- a/client/src/app/shared/shared-user-subscription/user-subscription.service.ts
+++ b/client/src/app/shared/shared-user-subscription/user-subscription.service.ts
@@ -1,11 +1,10 @@
 import * as debug from 'debug'
-import { uniq } from 'lodash-es'
-import { asyncScheduler, merge, Observable, of, ReplaySubject, Subject } from 'rxjs'
-import { bufferTime, catchError, filter, map, observeOn, share, switchMap, tap } from 'rxjs/operators'
+import { merge, Observable, of, ReplaySubject, Subject } from 'rxjs'
+import { catchError, filter, map, switchMap, tap } from 'rxjs/operators'
 import { HttpClient, HttpParams } from '@angular/common/http'
 import { Injectable, NgZone } from '@angular/core'
 import { ComponentPaginationLight, RestExtractor, RestService } from '@app/core'
-import { enterZone, leaveZone } from '@app/helpers'
+import { buildBulkObservable } from '@app/helpers'
 import { Video, VideoChannel, VideoChannelService, VideoService } from '@app/shared/shared-main'
 import { ResultList, VideoChannel as VideoChannelServer, VideoSortField } from '@shared/models'
 import { environment } from '../../../environments/environment'
@@ -35,15 +34,12 @@ export class UserSubscriptionService {
     private ngZone: NgZone
   ) {
     this.existsObservable = merge(
-      this.existsSubject.pipe(
-        // We leave Angular zone so Protractor does not get stuck
-        bufferTime(500, leaveZone(this.ngZone, asyncScheduler)),
-        filter(uris => uris.length !== 0),
-        map(uris => uniq(uris)),
-        observeOn(enterZone(this.ngZone, asyncScheduler)),
-        switchMap(uris => this.doSubscriptionsExist(uris)),
-        share()
-      ),
+      buildBulkObservable({
+        time: 500,
+        ngZone: this.ngZone,
+        notifierObservable: this.existsSubject,
+        bulkGet: this.doSubscriptionsExist.bind(this)
+      }),
 
       this.myAccountSubscriptionCacheSubject
     )
diff --git a/client/src/app/shared/shared-video-playlist/video-playlist.service.ts b/client/src/app/shared/shared-video-playlist/video-playlist.service.ts
index 1b87e0b2a..a3f1393ff 100644
--- a/client/src/app/shared/shared-video-playlist/video-playlist.service.ts
+++ b/client/src/app/shared/shared-video-playlist/video-playlist.service.ts
@@ -1,11 +1,10 @@
 import * as debug from 'debug'
-import { uniq } from 'lodash-es'
-import { asyncScheduler, merge, Observable, of, ReplaySubject, Subject } from 'rxjs'
-import { bufferTime, catchError, filter, map, observeOn, share, switchMap, tap, distinctUntilChanged } from 'rxjs/operators'
+import { merge, Observable, of, ReplaySubject, Subject } from 'rxjs'
+import { catchError, filter, map, share, switchMap, tap } from 'rxjs/operators'
 import { HttpClient, HttpParams } from '@angular/common/http'
 import { Injectable, NgZone } from '@angular/core'
 import { AuthUser, ComponentPaginationLight, RestExtractor, RestService, ServerService } from '@app/core'
-import { enterZone, leaveZone, objectToFormData } from '@app/helpers'
+import { buildBulkObservable, objectToFormData } from '@app/helpers'
 import { Account, AccountService, VideoChannel, VideoChannelService } from '@app/shared/shared-main'
 import {
   ResultList,
@@ -52,16 +51,12 @@ export class VideoPlaylistService {
     private ngZone: NgZone
   ) {
     this.videoExistsInPlaylistObservable = merge(
-      this.videoExistsInPlaylistNotifier.pipe(
-        distinctUntilChanged(),
-        // We leave Angular zone so Protractor does not get stuck
-        bufferTime(500, leaveZone(this.ngZone, asyncScheduler)),
-        filter(videoIds => videoIds.length !== 0),
-        map(videoIds => uniq(videoIds)),
-        observeOn(enterZone(this.ngZone, asyncScheduler)),
-        switchMap(videoIds => this.doVideosExistInPlaylist(videoIds)),
-        share()
-      ),
+      buildBulkObservable({
+        time: 500,
+        ngZone: this.ngZone,
+        bulkGet: this.doVideosExistInPlaylist.bind(this),
+        notifierObservable: this.videoExistsInPlaylistNotifier
+      }),
 
       this.videoExistsInPlaylistCacheSubject
     )