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

1 files changed, 60 insertions, 0 deletions

diff --git a/server/lib/views/shared/video-views.ts b/server/lib/views/shared/video-views.ts
new file mode 100644
index 000000000..19250f993
--- /dev/null
+++ b/server/lib/views/shared/video-views.ts
@@ -0,0 +1,60 @@
+import { logger, loggerTagsFactory } from '@server/helpers/logger'
+import { MVideo } from '@server/types/models'
+import { Redis } from '../../redis'
+
+const lTags = loggerTagsFactory('views')
+
+export class VideoViews {
+
+  async addLocalView (options: {
+    video: MVideo
+    ip: string
+    watchTime: number
+  }) {
+    const { video, ip, watchTime } = options
+
+    logger.debug('Adding local view to video %s.', video.uuid, { watchTime, ...lTags(video.uuid) })
+
+    if (!this.hasEnoughWatchTime(video, watchTime)) return false
+
+    const viewExists = await Redis.Instance.doesVideoIPViewExist(ip, video.uuid)
+    if (viewExists) return false
+
+    await Redis.Instance.setIPVideoView(ip, video.uuid)
+
+    await this.addView(video)
+
+    return true
+  }
+
+  async addRemoteView (options: {
+    video: MVideo
+  }) {
+    const { video } = options
+
+    logger.debug('Adding remote view to video %s.', video.uuid, { ...lTags(video.uuid) })
+
+    await this.addView(video)
+
+    return true
+  }
+
+  private async addView (video: MVideo) {
+    const promises: Promise<any>[] = []
+
+    if (video.isOwned()) {
+      promises.push(Redis.Instance.addLocalVideoView(video.id))
+    }
+
+    promises.push(Redis.Instance.addVideoViewStats(video.id))
+
+    await Promise.all(promises)
+  }
+
+  private hasEnoughWatchTime (video: MVideo, watchTime: number) {
+    if (video.isLive || video.duration >= 30) return watchTime >= 30
+
+    // Check more than 50% of the video is watched
+    return video.duration / watchTime < 2
+  }
+}