add channel and playlist stats to server stats endpoint (#3747)

* add channel and playlist stats to nodeinfo

* add tests for active video channels stats

* fix tests for active channel stats

server/models/video/video-channel.ts

@@ -1,4 +1,4 @@
-import { FindOptions, Includeable, literal, Op, ScopeOptions } from 'sequelize'
+import { FindOptions, Includeable, literal, Op, QueryTypes, ScopeOptions } from 'sequelize'
 import {
   AllowNull,
   BeforeDestroy,
@@ -338,6 +338,47 @@ export class VideoChannelModel extends Model {
     return VideoChannelModel.count(query)
   }
 
+  static async getStats () {
+
+    function getActiveVideoChannels (days: number) {
+      const options = {
+        type: QueryTypes.SELECT as QueryTypes.SELECT,
+        raw: true
+      }
+
+      const query = `
+SELECT          COUNT(DISTINCT("VideoChannelModel"."id")) AS "count"
+FROM            "videoChannel"                            AS "VideoChannelModel"
+INNER JOIN      "video"                                   AS "Videos"
+ON              "VideoChannelModel"."id" = "Videos"."channelId"
+AND             ("Videos"."publishedAt" > Now() - interval '${days}d')
+INNER JOIN      "account" AS "Account"
+ON              "VideoChannelModel"."accountId" = "Account"."id"
+INNER JOIN      "actor" AS "Account->Actor"
+ON              "Account"."actorId" = "Account->Actor"."id"
+AND             "Account->Actor"."serverId" IS NULL
+LEFT OUTER JOIN "server" AS "Account->Actor->Server"
+ON              "Account->Actor"."serverId" = "Account->Actor->Server"."id"`
+
+      return VideoChannelModel.sequelize.query<{ count: string }>(query, options)
+                              .then(r => parseInt(r[0].count, 10))
+    }
+
+    const totalLocalVideoChannels = await VideoChannelModel.count()
+    const totalLocalDailyActiveVideoChannels = await getActiveVideoChannels(1)
+    const totalLocalWeeklyActiveVideoChannels = await getActiveVideoChannels(7)
+    const totalLocalMonthlyActiveVideoChannels = await getActiveVideoChannels(30)
+    const totalHalfYearActiveVideoChannels = await getActiveVideoChannels(180)
+
+    return {
+      totalLocalVideoChannels,
+      totalLocalDailyActiveVideoChannels,
+      totalLocalWeeklyActiveVideoChannels,
+      totalLocalMonthlyActiveVideoChannels,
+      totalHalfYearActiveVideoChannels
+    }
+  }
+
   static listForApi (parameters: {
     actorId: number
     start: number

server/models/video/video-playlist.ts

@@ -54,6 +54,7 @@ import { buildServerIdsFollowedBy, buildWhereIdOrUUID, getPlaylistSort, isOutdat
 import { ThumbnailModel } from './thumbnail'
 import { ScopeNames as VideoChannelScopeNames, VideoChannelModel } from './video-channel'
 import { VideoPlaylistElementModel } from './video-playlist-element'
+import { ActorModel } from '../activitypub/actor'
 
 enum ScopeNames {
   AVAILABLE_FOR_LIST = 'AVAILABLE_FOR_LIST',
@@ -65,7 +66,7 @@ enum ScopeNames {
 }
 
 type AvailableForListOptions = {
-  followerActorId: number
+  followerActorId?: number
   type?: VideoPlaylistType
   accountId?: number
   videoChannelId?: number
@@ -134,20 +135,26 @@ type AvailableForListOptions = {
         privacy: VideoPlaylistPrivacy.PUBLIC
       })
 
-      // Only list local playlists OR playlists that are on an instance followed by actorId
-      const inQueryInstanceFollow = buildServerIdsFollowedBy(options.followerActorId)
+      // Only list local playlists
+      const whereActorOr: WhereOptions[] = [
+        {
+          serverId: null
+        }
+      ]
+
+      // … OR playlists that are on an instance followed by actorId
+      if (options.followerActorId) {
+        const inQueryInstanceFollow = buildServerIdsFollowedBy(options.followerActorId)
+
+        whereActorOr.push({
+          serverId: {
+            [Op.in]: literal(inQueryInstanceFollow)
+          }
+        })
+      }
 
       whereActor = {
-        [Op.or]: [
-          {
-            serverId: null
-          },
-          {
-            serverId: {
-              [Op.in]: literal(inQueryInstanceFollow)
-            }
-          }
-        ]
+        [Op.or]: whereActorOr
       }
     }
 
@@ -495,6 +502,33 @@ export class VideoPlaylistModel extends Model {
     return '/video-playlists/embed/' + this.uuid
   }
 
+  static async getStats () {
+    const totalLocalPlaylists = await VideoPlaylistModel.count({
+      include: [
+        {
+          model: AccountModel,
+          required: true,
+          include: [
+            {
+              model: ActorModel,
+              required: true,
+              where: {
+                serverId: null
+              }
+            }
+          ]
+        }
+      ],
+      where: {
+        privacy: VideoPlaylistPrivacy.PUBLIC
+      }
+    })
+
+    return {
+      totalLocalPlaylists
+    }
+  }
+
   setAsRefreshed () {
     this.changed('updatedAt', true)