Support video views/viewers stats in server

 * Add "currentTime" and "event" body params to view endpoint
 * Merge watching and view endpoints
 * Introduce WatchAction AP activity
 * Add tables to store viewer information of local videos
 * Add endpoints to fetch video views/viewers stats of local videos
 * Refactor views/viewers handlers
 * Support "views" and "viewers" counters for both VOD and live videos

6 files changed, 107 insertions, 37 deletions

diff --git a/shared/server-commands/server/server.ts b/shared/server-commands/server/server.ts
index 2bf31b5a4..0ad818a11 100644
--- a/shared/server-commands/server/server.ts
+++ b/shared/server-commands/server/server.ts
@@ -25,10 +25,12 @@ import {
   PlaylistsCommand,
   ServicesCommand,
   StreamingPlaylistsCommand,
+  VideosCommand,
   VideoStudioCommand,
-  VideosCommand
+  ViewsCommand
 } from '../videos'
 import { CommentsCommand } from '../videos/comments-command'
+import { VideoStatsCommand } from '../videos/video-stats-command'
 import { ConfigCommand } from './config-command'
 import { ContactFormCommand } from './contact-form-command'
 import { DebugCommand } from './debug-command'
@@ -127,6 +129,8 @@ export class PeerTubeServer {
   objectStorage?: ObjectStorageCommand
   videoStudio?: VideoStudioCommand
   videos?: VideosCommand
+  videoStats?: VideoStatsCommand
+  views?: ViewsCommand
 
   constructor (options: { serverNumber: number } | { url: string }) {
     if ((options as any).url) {
@@ -397,5 +401,7 @@ export class PeerTubeServer {
     this.videos = new VideosCommand(this)
     this.objectStorage = new ObjectStorageCommand(this)
     this.videoStudio = new VideoStudioCommand(this)
+    this.videoStats = new VideoStatsCommand(this)
+    this.views = new ViewsCommand(this)
   }
 }
diff --git a/shared/server-commands/videos/history-command.ts b/shared/server-commands/videos/history-command.ts
index e9dc63462..d27afcff2 100644
--- a/shared/server-commands/videos/history-command.ts
+++ b/shared/server-commands/videos/history-command.ts
@@ -3,25 +3,6 @@ import { AbstractCommand, OverrideCommandOptions } from '../shared'
 
 export class HistoryCommand extends AbstractCommand {
 
-  watchVideo (options: OverrideCommandOptions & {
-    videoId: number | string
-    currentTime: number
-  }) {
-    const { videoId, currentTime } = options
-
-    const path = '/api/v1/videos/' + videoId + '/watching'
-    const fields = { currentTime }
-
-    return this.putBodyRequest({
-      ...options,
-
-      path,
-      fields,
-      implicitToken: true,
-      defaultExpectedStatus: HttpStatusCode.NO_CONTENT_204
-    })
-  }
-
   list (options: OverrideCommandOptions & {
     search?: string
   } = {}) {
diff --git a/shared/server-commands/videos/index.ts b/shared/server-commands/videos/index.ts
index c9ef6134d..b861731fb 100644
--- a/shared/server-commands/videos/index.ts
+++ b/shared/server-commands/videos/index.ts
@@ -13,4 +13,5 @@ export * from './services-command'
 export * from './streaming-playlists-command'
 export * from './comments-command'
 export * from './video-studio-command'
+export * from './views-command'
 export * from './videos-command'
diff --git a/shared/server-commands/videos/video-stats-command.ts b/shared/server-commands/videos/video-stats-command.ts
new file mode 100644
index 000000000..90f7ffeaf
--- /dev/null
+++ b/shared/server-commands/videos/video-stats-command.ts
@@ -0,0 +1,48 @@
+import { HttpStatusCode, VideoStatsOverall, VideoStatsRetention, VideoStatsTimeserie, VideoStatsTimeserieMetric } from '@shared/models'
+import { AbstractCommand, OverrideCommandOptions } from '../shared'
+
+export class VideoStatsCommand extends AbstractCommand {
+
+  getOverallStats (options: OverrideCommandOptions & {
+    videoId: number | string
+  }) {
+    const path = '/api/v1/videos/' + options.videoId + '/stats/overall'
+
+    return this.getRequestBody<VideoStatsOverall>({
+      ...options,
+      path,
+
+      implicitToken: true,
+      defaultExpectedStatus: HttpStatusCode.OK_200
+    })
+  }
+
+  getTimeserieStats (options: OverrideCommandOptions & {
+    videoId: number | string
+    metric: VideoStatsTimeserieMetric
+  }) {
+    const path = '/api/v1/videos/' + options.videoId + '/stats/timeseries/' + options.metric
+
+    return this.getRequestBody<VideoStatsTimeserie>({
+      ...options,
+      path,
+
+      implicitToken: true,
+      defaultExpectedStatus: HttpStatusCode.OK_200
+    })
+  }
+
+  getRetentionStats (options: OverrideCommandOptions & {
+    videoId: number | string
+  }) {
+    const path = '/api/v1/videos/' + options.videoId + '/stats/retention'
+
+    return this.getRequestBody<VideoStatsRetention>({
+      ...options,
+      path,
+
+      implicitToken: true,
+      defaultExpectedStatus: HttpStatusCode.OK_200
+    })
+  }
+}
diff --git a/shared/server-commands/videos/videos-command.ts b/shared/server-commands/videos/videos-command.ts
index 21753ddc4..2ac426f76 100644
--- a/shared/server-commands/videos/videos-command.ts
+++ b/shared/server-commands/videos/videos-command.ts
@@ -107,23 +107,6 @@ export class VideosCommand extends AbstractCommand {
 
   // ---------------------------------------------------------------------------
 
-  view (options: OverrideCommandOptions & {
-    id: number | string
-    xForwardedFor?: string
-  }) {
-    const { id, xForwardedFor } = options
-    const path = '/api/v1/videos/' + id + '/views'
-
-    return this.postBodyRequest({
-      ...options,
-
-      path,
-      xForwardedFor,
-      implicitToken: false,
-      defaultExpectedStatus: HttpStatusCode.NO_CONTENT_204
-    })
-  }
-
   rate (options: OverrideCommandOptions & {
     id: number | string
     rating: UserVideoRateType
diff --git a/shared/server-commands/videos/views-command.ts b/shared/server-commands/videos/views-command.ts
new file mode 100644
index 000000000..01113f798
--- /dev/null
+++ b/shared/server-commands/videos/views-command.ts
@@ -0,0 +1,51 @@
+/* eslint-disable @typescript-eslint/no-unused-expressions,@typescript-eslint/no-floating-promises */
+import { HttpStatusCode, VideoViewEvent } from '@shared/models'
+import { AbstractCommand, OverrideCommandOptions } from '../shared'
+
+export class ViewsCommand extends AbstractCommand {
+
+  view (options: OverrideCommandOptions & {
+    id: number | string
+    currentTime?: number
+    viewEvent?: VideoViewEvent
+    xForwardedFor?: string
+  }) {
+    const { id, xForwardedFor, viewEvent, currentTime } = options
+    const path = '/api/v1/videos/' + id + '/views'
+
+    return this.postBodyRequest({
+      ...options,
+
+      path,
+      xForwardedFor,
+      fields: {
+        currentTime: currentTime ?? 1,
+        viewEvent
+      },
+      implicitToken: false,
+      defaultExpectedStatus: HttpStatusCode.NO_CONTENT_204
+    })
+  }
+
+  async simulateView (options: OverrideCommandOptions & {
+    id: number | string
+    xForwardedFor?: string
+  }) {
+    await this.view({ ...options, currentTime: 0 })
+    await this.view({ ...options, currentTime: 5 })
+  }
+
+  async simulateViewer (options: OverrideCommandOptions & {
+    id: number | string
+    currentTimes: number[]
+    xForwardedFor?: string
+  }) {
+    let viewEvent: VideoViewEvent = 'seek'
+
+    for (const currentTime of options.currentTimes) {
+      await this.view({ ...options, currentTime, viewEvent })
+
+      viewEvent = undefined
+    }
+  }
+}