Migrate server to ESM

Sorry for the very big commit that may lead to git log issues and merge
conflicts, but it's a major step forward:

 * Server can be faster at startup because imports() are async and we can
   easily lazy import big modules
 * Angular doesn't seem to support ES import (with .js extension), so we
   had to correctly organize peertube into a monorepo:
    * Use yarn workspace feature
    * Use typescript reference projects for dependencies
    * Shared projects have been moved into "packages", each one is now a
      node module (with a dedicated package.json/tsconfig.json)
    * server/tools have been moved into apps/ and is now a dedicated app
      bundled and published on NPM so users don't have to build peertube
      cli tools manually
    * server/tests have been moved into packages/ so we don't compile
      them every time we want to run the server
 * Use isolatedModule option:
   * Had to move from const enum to const
     (https://www.typescriptlang.org/docs/handbook/enums.html#objects-vs-enums)
   * Had to explictely specify "type" imports when used in decorators
 * Prefer tsx (that uses esbuild under the hood) instead of ts-node to
   load typescript files (tests with mocha or scripts):
     * To reduce test complexity as esbuild doesn't support decorator
       metadata, we only test server files that do not import server
       models
     * We still build tests files into js files for a faster CI
 * Remove unmaintained peertube CLI import script
 * Removed some barrels to speed up execution (less imports)

1 files changed, 0 insertions, 196 deletions

diff --git a/server/lib/views/shared/video-viewer-stats.ts b/server/lib/views/shared/video-viewer-stats.ts
deleted file mode 100644
index ebd963e59..000000000
--- a/server/lib/views/shared/video-viewer-stats.ts
+++ /dev/null
@@ -1,196 +0,0 @@
-import { Transaction } from 'sequelize/types'
-import { isTestOrDevInstance } 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, MVideoImmutable } 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: MVideoImmutable
-    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: MVideoImmutable
-    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]
-
-      if (lastSection.start > currentTime) {
-        logger.debug('Invalid end watch section %d. Last start record was at %d. Starting a new section.', currentTime, lastSection.start)
-
-        stats.watchSections.push({
-          start: currentTime,
-          end: currentTime
-        })
-      } else {
-        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 (!isTestOrDevInstance()) 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)
-  }
-}