PeerTube/server/models/view/local-video-viewer.ts

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import { QueryTypes } from 'sequelize'
import { AllowNull, BelongsTo, Column, CreatedAt, DataType, Default, ForeignKey, HasMany, IsUUID, Model, Table } from 'sequelize-typescript'
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'
import { VideoModel } from '../video/video'
import { LocalVideoViewerWatchSectionModel } from './local-video-viewer-watch-section'
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/**
*
* Aggregate viewers of local videos only to display statistics to video owners
* A viewer is a user that watched one or multiple sections of a specific video inside a time window
*
*/
@Table({
tableName: 'localVideoViewer',
updatedAt: false,
indexes: [
{
fields: [ 'videoId' ]
}
]
})
export class LocalVideoViewerModel extends Model<Partial<AttributesOnly<LocalVideoViewerModel>>> {
@CreatedAt
createdAt: Date
@AllowNull(false)
@Column(DataType.DATE)
startDate: Date
@AllowNull(false)
@Column(DataType.DATE)
endDate: Date
@AllowNull(false)
@Column
watchTime: number
@AllowNull(true)
@Column
country: string
@AllowNull(false)
@Default(DataType.UUIDV4)
@IsUUID(4)
@Column(DataType.UUID)
uuid: string
@AllowNull(false)
@Column
url: string
@ForeignKey(() => VideoModel)
@Column
videoId: number
@BelongsTo(() => VideoModel, {
foreignKey: {
allowNull: false
},
onDelete: 'CASCADE'
})
Video: VideoModel
@HasMany(() => LocalVideoViewerWatchSectionModel, {
foreignKey: {
allowNull: false
},
onDelete: 'cascade'
})
WatchSections: LocalVideoViewerWatchSectionModel[]
static loadByUrl (url: string): Promise<MLocalVideoViewer> {
return this.findOne({
where: {
url
}
})
}
static loadFullById (id: number): Promise<MLocalVideoViewerWithWatchSections> {
return this.findOne({
include: [
{
model: VideoModel.unscoped(),
required: true
},
{
model: LocalVideoViewerWatchSectionModel.unscoped(),
required: true
}
],
where: {
id
}
})
}
static async getOverallStats (options: {
video: MVideo
startDate?: string
endDate?: string
}): Promise<VideoStatsOverall> {
const { video, startDate, endDate } = options
const queryOptions = {
type: QueryTypes.SELECT as QueryTypes.SELECT,
replacements: { videoId: video.id } as any
}
let dateWhere = ''
if (startDate) {
dateWhere += ' AND "localVideoViewer"."startDate" >= :startDate'
queryOptions.replacements.startDate = startDate
}
if (endDate) {
dateWhere += ' AND "localVideoViewer"."endDate" <= :endDate'
queryOptions.replacements.endDate = endDate
}
const watchTimeQuery = `SELECT ` +
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`COUNT("localVideoViewer"."id") AS "totalViewers", ` +
`SUM("localVideoViewer"."watchTime") AS "totalWatchTime", ` +
`AVG("localVideoViewer"."watchTime") AS "averageWatchTime" ` +
`FROM "localVideoViewer" ` +
`INNER JOIN "video" ON "video"."id" = "localVideoViewer"."videoId" ` +
`WHERE "videoId" = :videoId ${dateWhere}`
const watchTimePromise = LocalVideoViewerModel.sequelize.query<any>(watchTimeQuery, queryOptions)
const watchPeakQuery = `WITH "watchPeakValues" AS (
SELECT "startDate" AS "dateBreakpoint", 1 AS "inc"
FROM "localVideoViewer"
WHERE "videoId" = :videoId ${dateWhere}
UNION ALL
SELECT "endDate" AS "dateBreakpoint", -1 AS "inc"
FROM "localVideoViewer"
WHERE "videoId" = :videoId ${dateWhere}
)
SELECT "dateBreakpoint", "concurrent"
FROM (
SELECT "dateBreakpoint", SUM(SUM("inc")) OVER (ORDER BY "dateBreakpoint") AS "concurrent"
FROM "watchPeakValues"
GROUP BY "dateBreakpoint"
) tmp
ORDER BY "concurrent" DESC
FETCH FIRST 1 ROW ONLY`
const watchPeakPromise = LocalVideoViewerModel.sequelize.query<any>(watchPeakQuery, queryOptions)
const countriesQuery = `SELECT country, COUNT(country) as viewers ` +
`FROM "localVideoViewer" ` +
`WHERE "videoId" = :videoId AND country IS NOT NULL ${dateWhere} ` +
`GROUP BY country ` +
`ORDER BY viewers DESC`
const countriesPromise = LocalVideoViewerModel.sequelize.query<any>(countriesQuery, queryOptions)
const [ rowsWatchTime, rowsWatchPeak, rowsCountries ] = await Promise.all([
watchTimePromise,
watchPeakPromise,
countriesPromise
])
const viewersPeak = rowsWatchPeak.length !== 0
? parseInt(rowsWatchPeak[0].concurrent) || 0
: 0
return {
totalWatchTime: rowsWatchTime.length !== 0
? Math.round(rowsWatchTime[0].totalWatchTime) || 0
: 0,
averageWatchTime: rowsWatchTime.length !== 0
? Math.round(rowsWatchTime[0].averageWatchTime) || 0
: 0,
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totalViewers: rowsWatchTime.length !== 0
? Math.round(rowsWatchTime[0].totalViewers) || 0
: 0,
viewersPeak,
viewersPeakDate: rowsWatchPeak.length !== 0 && viewersPeak !== 0
? rowsWatchPeak[0].dateBreakpoint || null
: null,
countries: rowsCountries.map(r => ({
isoCode: r.country,
viewers: r.viewers
}))
}
}
static async getRetentionStats (video: MVideo): Promise<VideoStatsRetention> {
const step = Math.max(Math.round(video.duration / 100), 1)
const query = `WITH "total" AS (SELECT COUNT(*) AS viewers FROM "localVideoViewer" WHERE "videoId" = :videoId) ` +
`SELECT serie AS "second", ` +
`(COUNT("localVideoViewer".id)::float / (SELECT GREATEST("total"."viewers", 1) FROM "total")) AS "retention" ` +
`FROM generate_series(0, ${video.duration}, ${step}) serie ` +
`LEFT JOIN "localVideoViewer" ON "localVideoViewer"."videoId" = :videoId ` +
`AND EXISTS (` +
`SELECT 1 FROM "localVideoViewerWatchSection" ` +
`WHERE "localVideoViewer"."id" = "localVideoViewerWatchSection"."localVideoViewerId" ` +
`AND serie >= "localVideoViewerWatchSection"."watchStart" ` +
`AND serie <= "localVideoViewerWatchSection"."watchEnd"` +
`)` +
`GROUP BY serie ` +
`ORDER BY serie ASC`
const queryOptions = {
type: QueryTypes.SELECT as QueryTypes.SELECT,
replacements: { videoId: video.id }
}
const rows = await LocalVideoViewerModel.sequelize.query<any>(query, queryOptions)
return {
data: rows.map(r => ({
second: r.second,
retentionPercent: parseFloat(r.retention) * 100
}))
}
}
static async getTimeserieStats (options: {
video: MVideo
metric: VideoStatsTimeserieMetric
startDate: string
endDate: string
}): Promise<VideoStatsTimeserie> {
const { video, metric } = options
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const { groupInterval, startDate, endDate } = buildGroupByAndBoundaries(options.startDate, options.endDate)
const selectMetrics: { [ id in VideoStatsTimeserieMetric ]: string } = {
viewers: 'COUNT("localVideoViewer"."id")',
aggregateWatchTime: 'SUM("localVideoViewer"."watchTime")'
}
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const intervalWhere: { [ id in VideoStatsTimeserieMetric ]: string } = {
// Viewer is still in the interval. Overlap algorithm
viewers: '"localVideoViewer"."startDate" <= "intervals"."endDate" ' +
'AND "localVideoViewer"."endDate" >= "intervals"."startDate"',
// We do an aggregation, so only sum things once. Arbitrary we use the end date for that purpose
aggregateWatchTime: '"localVideoViewer"."endDate" >= "intervals"."startDate" ' +
'AND "localVideoViewer"."endDate" <= "intervals"."endDate"'
}
const query = `WITH "intervals" AS (
SELECT
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"time" AS "startDate", "time" + :groupInterval::interval as "endDate"
FROM
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generate_series(:startDate::timestamptz, :endDate::timestamptz, :groupInterval::interval) serie("time")
)
SELECT "intervals"."startDate" as "date", COALESCE(${selectMetrics[metric]}, 0) AS value
FROM
intervals
LEFT JOIN "localVideoViewer" ON "localVideoViewer"."videoId" = :videoId
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AND ${intervalWhere[metric]}
GROUP BY
"intervals"."startDate"
ORDER BY
"intervals"."startDate"`
const queryOptions = {
type: QueryTypes.SELECT as QueryTypes.SELECT,
replacements: {
startDate,
endDate,
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groupInterval,
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)
}))
}
}
toActivityPubObject (this: MLocalVideoViewerWithWatchSections): WatchActionObject {
const location = this.country
? {
location: {
addressCountry: this.country
}
}
: {}
return {
id: this.url,
type: 'WatchAction',
duration: getActivityStreamDuration(this.watchTime),
startTime: this.startDate.toISOString(),
endTime: this.endDate.toISOString(),
object: this.Video.url,
uuid: this.uuid,
actionStatus: 'CompletedActionStatus',
watchSections: this.WatchSections.map(w => ({
startTimestamp: w.watchStart,
endTimestamp: w.watchEnd
})),
...location
}
}
}