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

8 files changed, 43 insertions, 2 deletions

diff --git a/shared/models/videos/index.ts b/shared/models/videos/index.ts
index 705e8d0ff..05497bda1 100644
--- a/shared/models/videos/index.ts
+++ b/shared/models/videos/index.ts
@@ -9,6 +9,7 @@ export * from './file'
 export * from './import'
 export * from './playlist'
 export * from './rate'
+export * from './stats'
 export * from './transcoding'
 
 export * from './nsfw-policy.type'
@@ -32,5 +33,6 @@ export * from './video-streaming-playlist.model'
 export * from './video-streaming-playlist.type'
 
 export * from './video-update.model'
+export * from './video-view.model'
 export * from './video.model'
 export * from './video-create-result.model'
diff --git a/shared/models/videos/stats/index.ts b/shared/models/videos/stats/index.ts
new file mode 100644
index 000000000..d1e9c167c
--- /dev/null
+++ b/shared/models/videos/stats/index.ts
@@ -0,0 +1,4 @@
+export * from './video-stats-overall.model'
+export * from './video-stats-retention.model'
+export * from './video-stats-timeserie.model'
+export * from './video-stats-timeserie-metric.type'
diff --git a/shared/models/videos/stats/video-stats-overall.model.ts b/shared/models/videos/stats/video-stats-overall.model.ts
new file mode 100644
index 000000000..f2a0470ef
--- /dev/null
+++ b/shared/models/videos/stats/video-stats-overall.model.ts
@@ -0,0 +1,17 @@
+export interface VideoStatsOverall {
+  averageWatchTime: number
+  totalWatchTime: number
+
+  viewersPeak: number
+  viewersPeakDate: string
+
+  views: number
+  likes: number
+  dislikes: number
+  comments: number
+
+  countries: {
+    isoCode: string
+    viewers: number
+  }[]
+}
diff --git a/shared/models/videos/stats/video-stats-retention.model.ts b/shared/models/videos/stats/video-stats-retention.model.ts
new file mode 100644
index 000000000..e494888ed
--- /dev/null
+++ b/shared/models/videos/stats/video-stats-retention.model.ts
@@ -0,0 +1,6 @@
+export interface VideoStatsRetention {
+  data: {
+    second: number
+    retentionPercent: number
+  }[]
+}
diff --git a/shared/models/videos/stats/video-stats-timeserie-metric.type.ts b/shared/models/videos/stats/video-stats-timeserie-metric.type.ts
new file mode 100644
index 000000000..fc268d083
--- /dev/null
+++ b/shared/models/videos/stats/video-stats-timeserie-metric.type.ts
@@ -0,0 +1 @@
+export type VideoStatsTimeserieMetric = 'viewers' | 'aggregateWatchTime'
diff --git a/shared/models/videos/stats/video-stats-timeserie.model.ts b/shared/models/videos/stats/video-stats-timeserie.model.ts
new file mode 100644
index 000000000..d95e34f1d
--- /dev/null
+++ b/shared/models/videos/stats/video-stats-timeserie.model.ts
@@ -0,0 +1,6 @@
+export interface VideoStatsTimeserie {
+  data: {
+    date: string
+    value: number
+  }[]
+}
diff --git a/shared/models/videos/video-view.model.ts b/shared/models/videos/video-view.model.ts
new file mode 100644
index 000000000..f61211104
--- /dev/null
+++ b/shared/models/videos/video-view.model.ts
@@ -0,0 +1,6 @@
+export type VideoViewEvent = 'seek'
+
+export interface VideoView {
+  currentTime: number
+  viewEvent?: VideoViewEvent
+}
diff --git a/shared/models/videos/video.model.ts b/shared/models/videos/video.model.ts
index f98eed012..d9765dbd6 100644
--- a/shared/models/videos/video.model.ts
+++ b/shared/models/videos/video.model.ts
@@ -39,8 +39,7 @@ export interface Video {
   url: string
 
   views: number
-  // If live
-  viewers?: number
+  viewers: number
 
   likes: number
   dislikes: number