11 files changed, 244 insertions, 132 deletions

diff --git a/config/default.yaml b/config/default.yaml
index af29a4379..ecb809c6a 100644
--- a/config/default.yaml
+++ b/config/default.yaml
@@ -74,6 +74,9 @@ redundancy:
 #    -
 #      size: '10GB'
 #      strategy: 'most-views' # Cache videos that have the most views
+#    -
+#      size: '10GB'
+#      strategy: 'trending' # Cache trending videos
 
 cache:
   previews:
diff --git a/config/production.yaml.example b/config/production.yaml.example
index ddd43093f..48d69e987 100644
--- a/config/production.yaml.example
+++ b/config/production.yaml.example
@@ -75,6 +75,9 @@ redundancy:
 #    -
 #      size: '10GB'
 #      strategy: 'most-views' # Cache videos that have the most views
+#    -
+#      size: '10GB'
+#      strategy: 'trending' # Cache trending videos
 
 ###############################################################################
 #
diff --git a/config/test.yaml b/config/test.yaml
index 0f280eabd..73bc5da98 100644
--- a/config/test.yaml
+++ b/config/test.yaml
@@ -26,6 +26,9 @@ redundancy:
     -
       size: '100KB'
       strategy: 'most-views'
+    -
+      size: '100KB'
+      strategy: 'trending'
 
 cache:
   previews:
diff --git a/scripts/clean/server/test.sh b/scripts/clean/server/test.sh
index 3b8fe39ed..5f9a88a2e 100755
--- a/scripts/clean/server/test.sh
+++ b/scripts/clean/server/test.sh
@@ -6,9 +6,8 @@ for i in $(seq 1 6); do
   dbname="peertube_test$i"
 
   dropdb --if-exists "$dbname"
-  rm -rf "./test$i"
-  rm -f "./config/local-test.json"
-  rm -f "./config/local-test-$i.json"
+  rm -rf "./test$i" "./config/local-test.json" "./config/local-test-$i.json"
+
   createdb -O peertube "$dbname"
   psql -c "CREATE EXTENSION pg_trgm;" "$dbname"
   psql -c "CREATE EXTENSION unaccent;" "$dbname"
diff --git a/server/initializers/checker.ts b/server/initializers/checker.ts
index 6a2badd35..6048151a3 100644
--- a/server/initializers/checker.ts
+++ b/server/initializers/checker.ts
@@ -41,7 +41,7 @@ function checkConfig () {
   const redundancyVideos = config.get<VideosRedundancy[]>('redundancy.videos')
   if (isArray(redundancyVideos)) {
     for (const r of redundancyVideos) {
-      if ([ 'most-views' ].indexOf(r.strategy) === -1) {
+      if ([ 'most-views', 'trending' ].indexOf(r.strategy) === -1) {
         return 'Redundancy video entries should have "most-views" strategy instead of ' + r.strategy
       }
     }
diff --git a/server/lib/schedulers/videos-redundancy-scheduler.ts b/server/lib/schedulers/videos-redundancy-scheduler.ts
index ee9ba1766..c1e619249 100644
--- a/server/lib/schedulers/videos-redundancy-scheduler.ts
+++ b/server/lib/schedulers/videos-redundancy-scheduler.ts
@@ -75,6 +75,8 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
 
   private findVideoToDuplicate (strategy: VideoRedundancyStrategy) {
     if (strategy === 'most-views') return VideoRedundancyModel.findMostViewToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
+
+    if (strategy === 'trending') return VideoRedundancyModel.findTrendingToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
   }
 
   private async createVideoRedundancy (strategy: VideoRedundancyStrategy, filesToDuplicate: VideoFileModel[]) {
diff --git a/server/models/redundancy/video-redundancy.ts b/server/models/redundancy/video-redundancy.ts
index 48ec77206..b13ade0f4 100644
--- a/server/models/redundancy/video-redundancy.ts
+++ b/server/models/redundancy/video-redundancy.ts
@@ -14,11 +14,10 @@ import {
   UpdatedAt
 } from 'sequelize-typescript'
 import { ActorModel } from '../activitypub/actor'
-import { throwIfNotValid } from '../utils'
+import { getVideoSort, throwIfNotValid } from '../utils'
 import { isActivityPubUrlValid, isUrlValid } from '../../helpers/custom-validators/activitypub/misc'
-import { CONSTRAINTS_FIELDS, VIDEO_EXT_MIMETYPE } from '../../initializers'
+import { CONFIG, CONSTRAINTS_FIELDS, VIDEO_EXT_MIMETYPE } from '../../initializers'
 import { VideoFileModel } from '../video/video-file'
-import { isDateValid } from '../../helpers/custom-validators/misc'
 import { getServerActor } from '../../helpers/utils'
 import { VideoModel } from '../video/video'
 import { VideoRedundancyStrategy } from '../../../shared/models/redundancy'
@@ -145,50 +144,51 @@ export class VideoRedundancyModel extends Model<VideoRedundancyModel> {
     return VideoRedundancyModel.findOne(query)
   }
 
+  static getVideoSample (rows: { id: number }[]) {
+    const ids = rows.map(r => r.id)
+    const id = sample(ids)
+
+    return VideoModel.loadWithFile(id, undefined, !isTestInstance())
+  }
+
   static async findMostViewToDuplicate (randomizedFactor: number) {
     // On VideoModel!
     const query = {
+      attributes: [ 'id', 'views' ],
       logging: !isTestInstance(),
       limit: randomizedFactor,
-      order: [ [ 'views', 'DESC' ] ],
+      order: getVideoSort('-views'),
       include: [
-        {
-          model: VideoFileModel.unscoped(),
-          required: true,
-          where: {
-            id: {
-              [ Sequelize.Op.notIn ]: await VideoRedundancyModel.buildExcludeIn()
-            }
-          }
-        },
-        {
-          attributes: [],
-          model: VideoChannelModel.unscoped(),
-          required: true,
-          include: [
-            {
-              attributes: [],
-              model: ActorModel.unscoped(),
-              required: true,
-              include: [
-                {
-                  attributes: [],
-                  model: ServerModel.unscoped(),
-                  required: true,
-                  where: {
-                    redundancyAllowed: true
-                  }
-                }
-              ]
-            }
-          ]
-        }
+        await VideoRedundancyModel.buildVideoFileForDuplication(),
+        VideoRedundancyModel.buildServerRedundancyInclude()
+      ]
+    }
+
+    const rows = await VideoModel.unscoped().findAll(query)
+
+    return VideoRedundancyModel.getVideoSample(rows as { id: number }[])
+  }
+
+  static async findTrendingToDuplicate (randomizedFactor: number) {
+    // On VideoModel!
+    const query = {
+      attributes: [ 'id', 'views' ],
+      subQuery: false,
+      logging: !isTestInstance(),
+      group: 'VideoModel.id',
+      limit: randomizedFactor,
+      order: getVideoSort('-trending'),
+      include: [
+        await VideoRedundancyModel.buildVideoFileForDuplication(),
+        VideoRedundancyModel.buildServerRedundancyInclude(),
+
+        VideoModel.buildTrendingQuery(CONFIG.TRENDING.VIDEOS.INTERVAL_DAYS)
       ]
     }
 
     const rows = await VideoModel.unscoped().findAll(query)
 
-    return sample(rows)
+    return VideoRedundancyModel.getVideoSample(rows as { id: number }[])
   }
 
   static async getVideoFiles (strategy: VideoRedundancyStrategy) {
@@ -211,7 +211,7 @@ export class VideoRedundancyModel extends Model<VideoRedundancyModel> {
       logging: !isTestInstance(),
       where: {
         expiresOn: {
-          [Sequelize.Op.lt]: new Date()
+          [ Sequelize.Op.lt ]: new Date()
         }
       }
     }
@@ -237,13 +237,50 @@ export class VideoRedundancyModel extends Model<VideoRedundancyModel> {
     }
   }
 
-  private static async buildExcludeIn () {
+  // Don't include video files we already duplicated
+  private static async buildVideoFileForDuplication () {
     const actor = await getServerActor()
 
-    return Sequelize.literal(
+    const notIn = Sequelize.literal(
       '(' +
         `SELECT "videoFileId" FROM "videoRedundancy" WHERE "actorId" = ${actor.id} AND "expiresOn" >= NOW()` +
       ')'
     )
+
+    return {
+      attributes: [],
+      model: VideoFileModel.unscoped(),
+      required: true,
+      where: {
+        id: {
+          [ Sequelize.Op.notIn ]: notIn
+        }
+      }
+    }
+  }
+
+  private static buildServerRedundancyInclude () {
+    return {
+      attributes: [],
+      model: VideoChannelModel.unscoped(),
+      required: true,
+      include: [
+        {
+          attributes: [],
+          model: ActorModel.unscoped(),
+          required: true,
+          include: [
+            {
+              attributes: [],
+              model: ServerModel.unscoped(),
+              required: true,
+              where: {
+                redundancyAllowed: true
+              }
+            }
+          ]
+        }
+      ]
+    }
   }
 }
diff --git a/server/models/video/video.ts b/server/models/video/video.ts
index 27c631dcd..ef8be7c86 100644
--- a/server/models/video/video.ts
+++ b/server/models/video/video.ts
@@ -387,16 +387,7 @@ type AvailableForListIDsOptions = {
     }
 
     if (options.trendingDays) {
-      query.include.push({
-        attributes: [],
-        model: VideoViewModel,
-        required: false,
-        where: {
-          startDate: {
-            [ Sequelize.Op.gte ]: new Date(new Date().getTime() - (24 * 3600 * 1000) * options.trendingDays)
-          }
-        }
-      })
+      query.include.push(VideoModel.buildTrendingQuery(options.trendingDays))
 
       query.subQuery = false
     }
@@ -1071,9 +1062,12 @@ export class VideoModel extends Model<VideoModel> {
   }
 
   static load (id: number, t?: Sequelize.Transaction) {
-    const options = t ? { transaction: t } : undefined
+    return VideoModel.findById(id, { transaction: t })
+  }
 
-    return VideoModel.findById(id, options)
+  static loadWithFile (id: number, t?: Sequelize.Transaction, logging?: boolean) {
+    return VideoModel.scope(ScopeNames.WITH_FILES)
+                     .findById(id, { transaction: t, logging })
   }
 
   static loadByUrlAndPopulateAccount (url: string, t?: Sequelize.Transaction) {
@@ -1191,6 +1185,20 @@ export class VideoModel extends Model<VideoModel> {
                      .then(rows => rows.map(r => r[ field ]))
   }
 
+  static buildTrendingQuery (trendingDays: number) {
+    return {
+      attributes: [],
+      subQuery: false,
+      model: VideoViewModel,
+      required: false,
+      where: {
+        startDate: {
+          [ Sequelize.Op.gte ]: new Date(new Date().getTime() - (24 * 3600 * 1000) * trendingDays)
+        }
+      }
+    }
+  }
+
   private static buildActorWhereWithFilter (filter?: VideoFilter) {
     if (filter && filter === 'local') {
       return {
diff --git a/server/tests/api/server/redundancy.ts b/server/tests/api/server/redundancy.ts
index c0ec75a45..211570d2f 100644
--- a/server/tests/api/server/redundancy.ts
+++ b/server/tests/api/server/redundancy.ts
@@ -22,9 +22,14 @@ import { updateRedundancy } from '../../utils/server/redundancy'
 import { ActorFollow } from '../../../../shared/models/actors'
 import { readdir } from 'fs-extra'
 import { join } from 'path'
+import { VideoRedundancyStrategy } from '../../../../shared/models/redundancy'
 
 const expect = chai.expect
 
+let servers: ServerInfo[] = []
+let video1Server2UUID: string
+let video2Server2UUID: string
+
 function checkMagnetWebseeds (file: { magnetUri: string, resolution: { id: number } }, baseWebseeds: string[]) {
   const parsed = magnetUtil.decode(file.magnetUri)
 
@@ -34,107 +39,159 @@ function checkMagnetWebseeds (file: { magnetUri: string, resolution: { id: numbe
   }
 }
 
-describe('Test videos redundancy', function () {
-  let servers: ServerInfo[] = []
-  let video1Server2UUID: string
-  let video2Server2UUID: string
+async function runServers (strategy: VideoRedundancyStrategy) {
+  const config = {
+    redundancy: {
+      videos: [
+        {
+          strategy: strategy,
+          size: '100KB'
+        }
+      ]
+    }
+  }
+  servers = await flushAndRunMultipleServers(3, config)
 
-  before(async function () {
-    this.timeout(120000)
+  // Get the access tokens
+  await setAccessTokensToServers(servers)
 
-    servers = await flushAndRunMultipleServers(3)
+  {
+    const res = await uploadVideo(servers[ 1 ].url, servers[ 1 ].accessToken, { name: 'video 1 server 2' })
+    video1Server2UUID = res.body.video.uuid
 
-    // Get the access tokens
-    await setAccessTokensToServers(servers)
+    await viewVideo(servers[ 1 ].url, video1Server2UUID)
+  }
 
-    {
-      const res = await uploadVideo(servers[ 1 ].url, servers[ 1 ].accessToken, { name: 'video 1 server 2' })
-      video1Server2UUID = res.body.video.uuid
+  {
+    const res = await uploadVideo(servers[ 1 ].url, servers[ 1 ].accessToken, { name: 'video 2 server 2' })
+    video2Server2UUID = res.body.video.uuid
+  }
 
-      await viewVideo(servers[1].url, video1Server2UUID)
-    }
+  await waitJobs(servers)
 
-    {
-      const res = await uploadVideo(servers[ 1 ].url, servers[ 1 ].accessToken, { name: 'video 2 server 2' })
-      video2Server2UUID = res.body.video.uuid
-    }
+  // Server 1 and server 2 follow each other
+  await doubleFollow(servers[ 0 ], servers[ 1 ])
+  // Server 1 and server 3 follow each other
+  await doubleFollow(servers[ 0 ], servers[ 2 ])
+  // Server 2 and server 3 follow each other
+  await doubleFollow(servers[ 1 ], servers[ 2 ])
+
+  await waitJobs(servers)
+}
 
-    await waitJobs(servers)
+async function check1WebSeed () {
+  const webseeds = [
+    'http://localhost:9002/static/webseed/' + video1Server2UUID
+  ]
 
-    // Server 1 and server 2 follow each other
-    await doubleFollow(servers[0], servers[1])
-    // Server 1 and server 3 follow each other
-    await doubleFollow(servers[0], servers[2])
-    // Server 2 and server 3 follow each other
-    await doubleFollow(servers[1], servers[2])
+  for (const server of servers) {
+    const res = await getVideo(server.url, video1Server2UUID)
 
-    await waitJobs(servers)
-  })
+    const video: VideoDetails = res.body
+    video.files.forEach(f => checkMagnetWebseeds(f, webseeds))
+  }
+}
+
+async function enableRedundancy () {
+  await updateRedundancy(servers[ 0 ].url, servers[ 0 ].accessToken, servers[ 1 ].host, true)
+
+  const res = await getFollowingListPaginationAndSort(servers[ 0 ].url, 0, 5, '-createdAt')
+  const follows: ActorFollow[] = res.body.data
+  const server2 = follows.find(f => f.following.host === 'localhost:9002')
+  const server3 = follows.find(f => f.following.host === 'localhost:9003')
+
+  expect(server3).to.not.be.undefined
+  expect(server3.following.hostRedundancyAllowed).to.be.false
+
+  expect(server2).to.not.be.undefined
+  expect(server2.following.hostRedundancyAllowed).to.be.true
+}
 
-  it('Should have 1 webseed on the first video', async function () {
-    const webseeds = [
-      'http://localhost:9002/static/webseed/' + video1Server2UUID
-    ]
+async function check2Webseeds () {
+  await waitJobs(servers)
+  await wait(15000)
+  await waitJobs(servers)
 
-    for (const server of servers) {
-      const res = await getVideo(server.url, video1Server2UUID)
+  const webseeds = [
+    'http://localhost:9001/static/webseed/' + video1Server2UUID,
+    'http://localhost:9002/static/webseed/' + video1Server2UUID
+  ]
 
-      const video: VideoDetails = res.body
-      video.files.forEach(f => checkMagnetWebseeds(f, webseeds))
+  for (const server of servers) {
+    const res = await getVideo(server.url, video1Server2UUID)
+
+    const video: VideoDetails = res.body
+
+    for (const file of video.files) {
+      checkMagnetWebseeds(file, webseeds)
     }
-  })
+  }
 
-  it('Should enable redundancy on server 1', async function () {
-    await updateRedundancy(servers[0].url, servers[0].accessToken, servers[1].host, true)
+  const files = await readdir(join(root(), 'test1', 'videos'))
+  expect(files).to.have.lengthOf(4)
 
-    const res = await getFollowingListPaginationAndSort(servers[0].url, 0, 5, '-createdAt')
-    const follows: ActorFollow[] = res.body.data
-    const server2 = follows.find(f => f.following.host === 'localhost:9002')
-    const server3 = follows.find(f => f.following.host === 'localhost:9003')
+  for (const resolution of [ 240, 360, 480, 720 ]) {
+    expect(files.find(f => f === `${video1Server2UUID}-${resolution}.mp4`)).to.not.be.undefined
+  }
+}
 
-    expect(server3).to.not.be.undefined
-    expect(server3.following.hostRedundancyAllowed).to.be.false
+async function cleanServers () {
+  killallServers(servers)
+}
 
-    expect(server2).to.not.be.undefined
-    expect(server2.following.hostRedundancyAllowed).to.be.true
-  })
+describe('Test videos redundancy', function () {
 
-  it('Should have 2 webseed on the first video', async function () {
-    this.timeout(40000)
+  describe('With most-views strategy', function () {
 
-    await waitJobs(servers)
-    await wait(15000)
-    await waitJobs(servers)
+    before(function () {
+      this.timeout(120000)
 
-    const webseeds = [
-      'http://localhost:9001/static/webseed/' + video1Server2UUID,
-      'http://localhost:9002/static/webseed/' + video1Server2UUID
-    ]
+      return runServers('most-views')
+    })
 
-    for (const server of servers) {
-      const res = await getVideo(server.url, video1Server2UUID)
+    it('Should have 1 webseed on the first video', function () {
+      return check1WebSeed()
+    })
 
-      const video: VideoDetails = res.body
+    it('Should enable redundancy on server 1', async function () {
+      return enableRedundancy()
+    })
 
-      for (const file of video.files) {
-        checkMagnetWebseeds(file, webseeds)
-      }
-    }
+    it('Should have 2 webseed on the first video', async function () {
+      this.timeout(40000)
 
-    const files = await readdir(join(root(), 'test1', 'videos'))
-    expect(files).to.have.lengthOf(4)
+      return check2Webseeds()
+    })
 
-    for (const resolution of [ 240, 360, 480, 720 ]) {
-      expect(files.find(f => f === `${video1Server2UUID}-${resolution}.mp4`)).to.not.be.undefined
-    }
+    after(function () {
+      return cleanServers()
+    })
   })
 
-  after(async function () {
-    killallServers(servers)
+  describe('With trending strategy', function () {
 
-    // Keep the logs if the test failed
-    if (this['ok']) {
-      await flushTests()
-    }
+    before(function () {
+      this.timeout(120000)
+
+      return runServers('trending')
+    })
+
+    it('Should have 1 webseed on the first video', function () {
+      return check1WebSeed()
+    })
+
+    it('Should enable redundancy on server 1', async function () {
+      return enableRedundancy()
+    })
+
+    it('Should have 2 webseed on the first video', async function () {
+      this.timeout(40000)
+
+      return check2Webseeds()
+    })
+
+    after(function () {
+      return cleanServers()
+    })
   })
 })
diff --git a/server/tests/utils/server/servers.ts b/server/tests/utils/server/servers.ts
index 1372c03c3..e95be4a16 100644
--- a/server/tests/utils/server/servers.ts
+++ b/server/tests/utils/server/servers.ts
@@ -35,7 +35,7 @@ interface ServerInfo {
   }
 }
 
-function flushAndRunMultipleServers (totalServers) {
+function flushAndRunMultipleServers (totalServers: number, configOverride?: Object) {
   let apps = []
   let i = 0
 
@@ -53,7 +53,7 @@ function flushAndRunMultipleServers (totalServers) {
         for (let j = 1; j <= totalServers; j++) {
           // For the virtual buffer
           setTimeout(() => {
-            runServer(j).then(app => anotherServerDone(j, app))
+            runServer(j, configOverride).then(app => anotherServerDone(j, app))
           }, 1000 * (j - 1))
         }
       })
diff --git a/shared/models/redundancy/videos-redundancy.model.ts b/shared/models/redundancy/videos-redundancy.model.ts
index eb84964e0..85982e5b3 100644
--- a/shared/models/redundancy/videos-redundancy.model.ts
+++ b/shared/models/redundancy/videos-redundancy.model.ts
@@ -1,4 +1,4 @@
-export type VideoRedundancyStrategy = 'most-views'
+export type VideoRedundancyStrategy = 'most-views' | 'trending'
 
 export interface VideosRedundancy {
   strategy: VideoRedundancyStrategy