import { Transaction } from 'sequelize/types' import { isTestInstance } from '@server/helpers/core-utils' import { GeoIP } from '@server/helpers/geo-ip' import { logger, loggerTagsFactory } from '@server/helpers/logger' import { MAX_LOCAL_VIEWER_WATCH_SECTIONS, VIEW_LIFETIME } from '@server/initializers/constants' import { sequelizeTypescript } from '@server/initializers/database' import { sendCreateWatchAction } from '@server/lib/activitypub/send' import { getLocalVideoViewerActivityPubUrl } from '@server/lib/activitypub/url' import { Redis } from '@server/lib/redis' import { VideoModel } from '@server/models/video/video' import { LocalVideoViewerModel } from '@server/models/view/local-video-viewer' import { LocalVideoViewerWatchSectionModel } from '@server/models/view/local-video-viewer-watch-section' import { MVideo } from '@server/types/models' import { VideoViewEvent } from '@shared/models' const lTags = loggerTagsFactory('views') type LocalViewerStats = { firstUpdated: number // Date.getTime() lastUpdated: number // Date.getTime() watchSections: { start: number end: number }[] watchTime: number country: string videoId: number } export class VideoViewerStats { private processingViewersStats = false constructor () { setInterval(() => this.processViewerStats(), VIEW_LIFETIME.VIEWER_STATS) } // --------------------------------------------------------------------------- async addLocalViewer (options: { video: MVideo currentTime: number ip: string viewEvent?: VideoViewEvent }) { const { video, ip, viewEvent, currentTime } = options logger.debug('Adding local viewer to video stats %s.', video.uuid, { currentTime, viewEvent, ...lTags(video.uuid) }) return this.updateLocalViewerStats({ video, viewEvent, currentTime, ip }) } // --------------------------------------------------------------------------- async getWatchTime (videoId: number, ip: string) { const stats: LocalViewerStats = await Redis.Instance.getLocalVideoViewer({ ip, videoId }) return stats?.watchTime || 0 } // --------------------------------------------------------------------------- private async updateLocalViewerStats (options: { video: MVideo ip: string currentTime: number viewEvent?: VideoViewEvent }) { const { video, ip, viewEvent, currentTime } = options const nowMs = new Date().getTime() let stats: LocalViewerStats = await Redis.Instance.getLocalVideoViewer({ ip, videoId: video.id }) if (stats && stats.watchSections.length >= MAX_LOCAL_VIEWER_WATCH_SECTIONS) { logger.warn('Too much watch section to store for a viewer, skipping this one', { currentTime, viewEvent, ...lTags(video.uuid) }) return } if (!stats) { const country = await GeoIP.Instance.safeCountryISOLookup(ip) stats = { firstUpdated: nowMs, lastUpdated: nowMs, watchSections: [], watchTime: 0, country, videoId: video.id } } stats.lastUpdated = nowMs if (viewEvent === 'seek' || stats.watchSections.length === 0) { stats.watchSections.push({ start: currentTime, end: currentTime }) } else { const lastSection = stats.watchSections[stats.watchSections.length - 1] lastSection.end = currentTime } stats.watchTime = this.buildWatchTimeFromSections(stats.watchSections) logger.debug('Set local video viewer stats for video %s.', video.uuid, { stats, ...lTags(video.uuid) }) await Redis.Instance.setLocalVideoViewer(ip, video.id, stats) } async processViewerStats () { if (this.processingViewersStats) return this.processingViewersStats = true if (!isTestInstance()) logger.info('Processing viewer statistics.', lTags()) const now = new Date().getTime() try { const allKeys = await Redis.Instance.listLocalVideoViewerKeys() for (const key of allKeys) { const stats: LocalViewerStats = await Redis.Instance.getLocalVideoViewer({ key }) // Process expired stats if (stats.lastUpdated > now - VIEW_LIFETIME.VIEWER_STATS) { continue } try { await sequelizeTypescript.transaction(async t => { const video = await VideoModel.load(stats.videoId, t) if (!video) return const statsModel = await this.saveViewerStats(video, stats, t) if (video.remote) { await sendCreateWatchAction(statsModel, t) } }) await Redis.Instance.deleteLocalVideoViewersKeys(key) } catch (err) { logger.error('Cannot process viewer stats for Redis key %s.', key, { err, ...lTags() }) } } } catch (err) { logger.error('Error in video save viewers stats scheduler.', { err, ...lTags() }) } this.processingViewersStats = false } private async saveViewerStats (video: MVideo, stats: LocalViewerStats, transaction: Transaction) { const statsModel = new LocalVideoViewerModel({ startDate: new Date(stats.firstUpdated), endDate: new Date(stats.lastUpdated), watchTime: stats.watchTime, country: stats.country, videoId: video.id }) statsModel.url = getLocalVideoViewerActivityPubUrl(statsModel) statsModel.Video = video as VideoModel await statsModel.save({ transaction }) statsModel.WatchSections = await LocalVideoViewerWatchSectionModel.bulkCreateSections({ localVideoViewerId: statsModel.id, watchSections: stats.watchSections, transaction }) return statsModel } private buildWatchTimeFromSections (sections: { start: number, end: number }[]) { return sections.reduce((p, current) => p + (current.end - current.start), 0) } }