6 files changed, 277 insertions, 20 deletions

diff --git a/server/controllers/api/videos/stats.ts b/server/controllers/api/videos/stats.ts
index 5f8513e9e..71452d9f0 100644
--- a/server/controllers/api/videos/stats.ts
+++ b/server/controllers/api/videos/stats.ts
@@ -1,6 +1,6 @@
 import express from 'express'
 import { LocalVideoViewerModel } from '@server/models/view/local-video-viewer'
-import { VideoStatsTimeserieMetric } from '@shared/models'
+import { VideoStatsTimeserieMetric, VideoStatsTimeserieQuery } from '@shared/models'
 import {
   asyncMiddleware,
   authenticate,
@@ -57,10 +57,23 @@ async function getTimeserieStats (req: express.Request, res: express.Response) {
   const video = res.locals.videoAll
   const metric = req.params.metric as VideoStatsTimeserieMetric
 
+  const query = req.query as VideoStatsTimeserieQuery
+
   const stats = await LocalVideoViewerModel.getTimeserieStats({
     video,
-    metric
+    metric,
+    startDate: query.startDate ?? buildOneMonthAgo().toISOString(),
+    endDate: query.endDate ?? new Date().toISOString()
   })
 
   return res.json(stats)
 }
+
+function buildOneMonthAgo () {
+  const monthAgo = new Date()
+  monthAgo.setHours(0, 0, 0, 0)
+
+  monthAgo.setDate(monthAgo.getDate() - 29)
+
+  return monthAgo
+}
diff --git a/server/lib/timeserie.ts b/server/lib/timeserie.ts
new file mode 100644
index 000000000..d8f700a2f
--- /dev/null
+++ b/server/lib/timeserie.ts
@@ -0,0 +1,55 @@
+import { logger } from '@server/helpers/logger'
+import { VideoStatsTimeserieGroupInterval } from '@shared/models'
+
+function buildGroupByAndBoundaries (startDateString: string, endDateString: string) {
+  const startDate = new Date(startDateString)
+  const endDate = new Date(endDateString)
+
+  const groupByMatrix: { [ id in VideoStatsTimeserieGroupInterval ]: string } = {
+    one_day: '1 day',
+    one_hour: '1 hour',
+    ten_minutes: '10 minutes',
+    one_minute: '1 minute'
+  }
+  const groupInterval = buildGroupInterval(startDate, endDate)
+
+  logger.debug('Found "%s" group interval.', groupInterval, { startDate, endDate })
+
+  // Remove parts of the date we don't need
+  if (groupInterval === 'one_day') {
+    startDate.setHours(0, 0, 0, 0)
+  } else if (groupInterval === 'one_hour') {
+    startDate.setMinutes(0, 0, 0)
+  } else {
+    startDate.setSeconds(0, 0)
+  }
+
+  return {
+    groupInterval,
+    sqlInterval: groupByMatrix[groupInterval],
+    startDate,
+    endDate
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  buildGroupByAndBoundaries
+}
+
+// ---------------------------------------------------------------------------
+
+function buildGroupInterval (startDate: Date, endDate: Date): VideoStatsTimeserieGroupInterval {
+  const aDay = 86400
+  const anHour = 3600
+  const aMinute = 60
+
+  const diffSeconds = (endDate.getTime() - startDate.getTime()) / 1000
+
+  if (diffSeconds >= 6 * aDay) return 'one_day'
+  if (diffSeconds >= 6 * anHour) return 'one_hour'
+  if (diffSeconds >= 60 * aMinute) return 'ten_minutes'
+
+  return 'one_minute'
+}
diff --git a/server/middlewares/validators/videos/video-stats.ts b/server/middlewares/validators/videos/video-stats.ts
index 358b6b473..12509abde 100644
--- a/server/middlewares/validators/videos/video-stats.ts
+++ b/server/middlewares/validators/videos/video-stats.ts
@@ -1,7 +1,9 @@
 import express from 'express'
-import { param } from 'express-validator'
+import { param, query } from 'express-validator'
+import { isDateValid } from '@server/helpers/custom-validators/misc'
 import { isValidStatTimeserieMetric } from '@server/helpers/custom-validators/video-stats'
-import { HttpStatusCode, UserRight } from '@shared/models'
+import { STATS_TIMESERIE } from '@server/initializers/constants'
+import { HttpStatusCode, UserRight, VideoStatsTimeserieQuery } from '@shared/models'
 import { logger } from '../../../helpers/logger'
 import { areValidationErrors, checkUserCanManageVideo, doesVideoExist, isValidVideoIdParam } from '../shared'
 
@@ -45,12 +47,40 @@ const videoTimeserieStatsValidator = [
     .custom(isValidStatTimeserieMetric)
     .withMessage('Should have a valid timeserie metric'),
 
+  query('startDate')
+    .optional()
+    .custom(isDateValid)
+    .withMessage('Should have a valid start date'),
+
+  query('endDate')
+    .optional()
+    .custom(isDateValid)
+    .withMessage('Should have a valid end date'),
+
   async (req: express.Request, res: express.Response, next: express.NextFunction) => {
     logger.debug('Checking videoTimeserieStatsValidator parameters', { parameters: req.body })
 
     if (areValidationErrors(req, res)) return
     if (!await commonStatsCheck(req, res)) return
 
+    const query: VideoStatsTimeserieQuery = req.query
+    if (
+      (query.startDate && !query.endDate) ||
+      (!query.startDate && query.endDate)
+    ) {
+      return res.fail({
+        status: HttpStatusCode.BAD_REQUEST_400,
+        message: 'Both start date and end date should be defined if one of them is specified'
+      })
+    }
+
+    if (query.startDate && getIntervalByDays(query.startDate, query.endDate) > STATS_TIMESERIE.MAX_DAYS) {
+      return res.fail({
+        status: HttpStatusCode.BAD_REQUEST_400,
+        message: 'Star date and end date interval is too big'
+      })
+    }
+
     return next()
   }
 ]
@@ -71,3 +101,10 @@ async function commonStatsCheck (req: express.Request, res: express.Response) {
 
   return true
 }
+
+function getIntervalByDays (startDateString: string, endDateString: string) {
+  const startDate = new Date(startDateString)
+  const endDate = new Date(endDateString)
+
+  return (endDate.getTime() - startDate.getTime()) / 1000 / 86400
+}
diff --git a/server/models/view/local-video-viewer.ts b/server/models/view/local-video-viewer.ts
index 1491acb9e..ad2ad35ca 100644
--- a/server/models/view/local-video-viewer.ts
+++ b/server/models/view/local-video-viewer.ts
@@ -1,7 +1,7 @@
 import { QueryTypes } from 'sequelize'
 import { AllowNull, BelongsTo, Column, CreatedAt, DataType, Default, ForeignKey, HasMany, IsUUID, Model, Table } from 'sequelize-typescript'
-import { STATS_TIMESERIE } from '@server/initializers/constants'
 import { getActivityStreamDuration } from '@server/lib/activitypub/activity'
+import { buildGroupByAndBoundaries } from '@server/lib/timeserie'
 import { MLocalVideoViewer, MLocalVideoViewerWithWatchSections, MVideo } from '@server/types/models'
 import { VideoStatsOverall, VideoStatsRetention, VideoStatsTimeserie, VideoStatsTimeserieMetric, WatchActionObject } from '@shared/models'
 import { AttributesOnly } from '@shared/typescript-utils'
@@ -216,33 +216,48 @@ export class LocalVideoViewerModel extends Model<Partial<AttributesOnly<LocalVid
   static async getTimeserieStats (options: {
     video: MVideo
     metric: VideoStatsTimeserieMetric
+    startDate: string
+    endDate: string
   }): Promise<VideoStatsTimeserie> {
     const { video, metric } = options
 
+    const { groupInterval, sqlInterval, startDate, endDate } = buildGroupByAndBoundaries(options.startDate, options.endDate)
+
     const selectMetrics: { [ id in VideoStatsTimeserieMetric ]: string } = {
       viewers: 'COUNT("localVideoViewer"."id")',
       aggregateWatchTime: 'SUM("localVideoViewer"."watchTime")'
     }
 
-    const query = `WITH days AS ( ` +
-       `SELECT (current_date::timestamp - (serie || ' days')::interval)::timestamptz AS day
-        FROM generate_series(0, ${STATS_TIMESERIE.MAX_DAYS - 1}) serie` +
-      `) ` +
-      `SELECT days.day AS date, COALESCE(${selectMetrics[metric]}, 0) AS value ` +
-      `FROM days ` +
-      `LEFT JOIN "localVideoViewer" ON "localVideoViewer"."videoId" = :videoId ` +
-        `AND date_trunc('day', "localVideoViewer"."startDate") = date_trunc('day', days.day) ` +
-      `GROUP BY day ` +
-      `ORDER BY day `
+    const query = `WITH "intervals" AS (
+      SELECT
+        "time" AS "startDate", "time" + :sqlInterval::interval as "endDate"
+      FROM
+        generate_series(:startDate::timestamptz, :endDate::timestamptz, :sqlInterval::interval) serie("time")
+    )
+    SELECT "intervals"."startDate" as "date", COALESCE(${selectMetrics[metric]}, 0) AS value
+    FROM
+      intervals
+      LEFT JOIN "localVideoViewer" ON "localVideoViewer"."videoId" = :videoId
+        AND "localVideoViewer"."startDate" >= "intervals"."startDate" AND "localVideoViewer"."startDate" <= "intervals"."endDate"
+    GROUP BY
+      "intervals"."startDate"
+    ORDER BY
+      "intervals"."startDate"`
 
     const queryOptions = {
       type: QueryTypes.SELECT as QueryTypes.SELECT,
-      replacements: { videoId: video.id }
+      replacements: {
+        startDate,
+        endDate,
+        sqlInterval,
+        videoId: video.id
+      }
     }
 
     const rows = await LocalVideoViewerModel.sequelize.query<any>(query, queryOptions)
 
     return {
+      groupInterval,
       data: rows.map(r => ({
         date: r.date,
         value: parseInt(r.value)
diff --git a/server/tests/api/check-params/views.ts b/server/tests/api/check-params/views.ts
index ca4752345..3dba2a42e 100644
--- a/server/tests/api/check-params/views.ts
+++ b/server/tests/api/check-params/views.ts
@@ -112,6 +112,54 @@ describe('Test videos views', function () {
       await servers[0].videoStats.getTimeserieStats({ videoId, metric: 'hello' as any, expectedStatus: HttpStatusCode.BAD_REQUEST_400 })
     })
 
+    it('Should fail with an invalid start date', async function () {
+      await servers[0].videoStats.getTimeserieStats({
+        videoId,
+        metric: 'viewers',
+        startDate: 'fake' as any,
+        endDate: new Date(),
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400
+      })
+    })
+
+    it('Should fail with an invalid end date', async function () {
+      await servers[0].videoStats.getTimeserieStats({
+        videoId,
+        metric: 'viewers',
+        startDate: new Date(),
+        endDate: 'fake' as any,
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400
+      })
+    })
+
+    it('Should fail if start date is specified but not end date', async function () {
+      await servers[0].videoStats.getTimeserieStats({
+        videoId,
+        metric: 'viewers',
+        startDate: new Date(),
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400
+      })
+    })
+
+    it('Should fail if end date is specified but not start date', async function () {
+      await servers[0].videoStats.getTimeserieStats({
+        videoId,
+        metric: 'viewers',
+        endDate: new Date(),
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400
+      })
+    })
+
+    it('Should fail with a too big interval', async function () {
+      await servers[0].videoStats.getTimeserieStats({
+        videoId,
+        metric: 'viewers',
+        startDate: new Date('2021-04-07T08:31:57.126Z'),
+        endDate: new Date(),
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400
+      })
+    })
+
     it('Should succeed with the correct parameters', async function () {
       await servers[0].videoStats.getTimeserieStats({ videoId, metric: 'viewers' })
     })
diff --git a/server/tests/api/views/video-views-timeserie-stats.ts b/server/tests/api/views/video-views-timeserie-stats.ts
index 858edeff7..4db76fe89 100644
--- a/server/tests/api/views/video-views-timeserie-stats.ts
+++ b/server/tests/api/views/video-views-timeserie-stats.ts
@@ -47,21 +47,31 @@ describe('Test views timeserie stats', function () {
     let liveVideoId: string
     let command: FfmpegCommand
 
-    function expectTimeserieData (result: VideoStatsTimeserie, lastValue: number) {
+    function expectTodayLastValue (result: VideoStatsTimeserie, lastValue: number) {
       const { data } = result
-      expect(data).to.have.lengthOf(30)
 
       const last = data[data.length - 1]
-
       const today = new Date().getDate()
       expect(new Date(last.date).getDate()).to.equal(today)
-      expect(last.value).to.equal(lastValue)
+    }
+
+    function expectTimeserieData (result: VideoStatsTimeserie, lastValue: number) {
+      const { data } = result
+      expect(data).to.have.lengthOf(30)
+
+      expectTodayLastValue(result, lastValue)
 
       for (let i = 0; i < data.length - 2; i++) {
         expect(data[i].value).to.equal(0)
       }
     }
 
+    function expectInterval (result: VideoStatsTimeserie, intervalMs: number) {
+      const first = result.data[0]
+      const second = result.data[1]
+      expect(new Date(second.date).getTime() - new Date(first.date).getTime()).to.equal(intervalMs)
+    }
+
     before(async function () {
       this.timeout(120000);
 
@@ -98,6 +108,85 @@ describe('Test views timeserie stats', function () {
       }
     })
 
+    it('Should use a custom start/end date', async function () {
+      const now = new Date()
+      const tenDaysAgo = new Date()
+      tenDaysAgo.setDate(tenDaysAgo.getDate() - 9)
+
+      const result = await servers[0].videoStats.getTimeserieStats({
+        videoId: vodVideoId,
+        metric: 'aggregateWatchTime',
+        startDate: tenDaysAgo,
+        endDate: now
+      })
+
+      expect(result.groupInterval).to.equal('one_day')
+      expect(result.data).to.have.lengthOf(10)
+
+      const first = result.data[0]
+      expect(new Date(first.date).toLocaleDateString()).to.equal(tenDaysAgo.toLocaleDateString())
+
+      expectInterval(result, 24 * 3600 * 1000)
+      expectTodayLastValue(result, 9)
+    })
+
+    it('Should automatically group by hours', async function () {
+      const now = new Date()
+      const twoDaysAgo = new Date()
+      twoDaysAgo.setDate(twoDaysAgo.getDate() - 1)
+
+      const result = await servers[0].videoStats.getTimeserieStats({
+        videoId: vodVideoId,
+        metric: 'aggregateWatchTime',
+        startDate: twoDaysAgo,
+        endDate: now
+      })
+
+      expect(result.groupInterval).to.equal('one_hour')
+      expect(result.data).to.have.length.above(24).and.below(50)
+
+      expectInterval(result, 3600 * 1000)
+      expectTodayLastValue(result, 9)
+    })
+
+    it('Should automatically group by ten minutes', async function () {
+      const now = new Date()
+      const twoHoursAgo = new Date()
+      twoHoursAgo.setHours(twoHoursAgo.getHours() - 1)
+
+      const result = await servers[0].videoStats.getTimeserieStats({
+        videoId: vodVideoId,
+        metric: 'aggregateWatchTime',
+        startDate: twoHoursAgo,
+        endDate: now
+      })
+
+      expect(result.groupInterval).to.equal('ten_minutes')
+      expect(result.data).to.have.length.above(6).and.below(18)
+
+      expectInterval(result, 60 * 10 * 1000)
+      expectTodayLastValue(result, 9)
+    })
+
+    it('Should automatically group by one minute', async function () {
+      const now = new Date()
+      const thirtyAgo = new Date()
+      thirtyAgo.setMinutes(thirtyAgo.getMinutes() - 30)
+
+      const result = await servers[0].videoStats.getTimeserieStats({
+        videoId: vodVideoId,
+        metric: 'aggregateWatchTime',
+        startDate: thirtyAgo,
+        endDate: now
+      })
+
+      expect(result.groupInterval).to.equal('one_minute')
+      expect(result.data).to.have.length.above(20).and.below(40)
+
+      expectInterval(result, 60 * 1000)
+      expectTodayLastValue(result, 9)
+    })
+
     after(async function () {
       await stopFfmpeg(command)
     })