server/lib/request/request-video-event-scheduler.ts

   1 import * as Sequelize from 'sequelize'
   2
   3 import { database as db } from '../../initializers/database'
   4 import { AbstractRequestScheduler } from './abstract-request-scheduler'
   5 import {
   6   REQUESTS_VIDEO_EVENT_LIMIT_PODS,
   7   REQUESTS_VIDEO_EVENT_LIMIT_PER_POD,
   8   REQUEST_VIDEO_EVENT_ENDPOINT
   9 } from '../../initializers'
  10 import { RequestVideoEventType } from '../../../shared'
  11
  12 export type RequestVideoEventSchedulerOptions = {
  13   type: RequestVideoEventType
  14   videoId: string
  15   count?: number
  16   transaction?: Sequelize.Transaction
  17 }
  18
  19 class RequestVideoEventScheduler extends AbstractRequestScheduler {
  20   constructor () {
  21     super()
  22
  23     // We limit the size of the requests
  24     this.limitPods = REQUESTS_VIDEO_EVENT_LIMIT_PODS
  25     this.limitPerPod = REQUESTS_VIDEO_EVENT_LIMIT_PER_POD
  26
  27     this.description = 'video event requests'
  28   }
  29
  30   getRequestModel () {
  31     return db.RequestVideoEvent
  32   }
  33
  34   getRequestToPodModel () {
  35     return db.RequestVideoEvent
  36   }
  37
  38   buildRequestObjects (eventsToProcess: { [ toPodId: number ]: any }[]) {
  39     const requestsToMakeGrouped = {}
  40
  41     /* Example:
  42         {
  43           pod1: {
  44             video1: { views: 4, likes: 5 },
  45             video2: { likes: 5 }
  46           }
  47         }
  48     */
  49     const eventsPerVideoPerPod = {}
  50
  51     // We group video events per video and per pod
  52     // We add the counts of the same event types
  53     Object.keys(eventsToProcess).forEach(toPodId => {
  54       eventsToProcess[toPodId].forEach(eventToProcess => {
  55         if (!eventsPerVideoPerPod[toPodId]) eventsPerVideoPerPod[toPodId] = {}
  56
  57         if (!requestsToMakeGrouped[toPodId]) {
  58           requestsToMakeGrouped[toPodId] = {
  59             toPod: eventToProcess.pod,
  60             endpoint: REQUEST_VIDEO_EVENT_ENDPOINT,
  61             ids: [], // request ids, to delete them from the DB in the future
  62             datas: [] // requests data
  63           }
  64         }
  65         requestsToMakeGrouped[toPodId].ids.push(eventToProcess.id)
  66
  67         const eventsPerVideo = eventsPerVideoPerPod[toPodId]
  68         const remoteId = eventToProcess.video.remoteId
  69         if (!eventsPerVideo[remoteId]) eventsPerVideo[remoteId] = {}
  70
  71         const events = eventsPerVideo[remoteId]
  72         if (!events[eventToProcess.type]) events[eventToProcess.type] = 0
  73
  74         events[eventToProcess.type] += eventToProcess.count
  75       })
  76     })
  77
  78     // Now we build our requests array per pod
  79     Object.keys(eventsPerVideoPerPod).forEach(toPodId => {
  80       const eventsForPod = eventsPerVideoPerPod[toPodId]
  81
  82       Object.keys(eventsForPod).forEach(remoteId => {
  83         const eventsForVideo = eventsForPod[remoteId]
  84
  85         Object.keys(eventsForVideo).forEach(eventType => {
  86           requestsToMakeGrouped[toPodId].datas.push({
  87             data: {
  88               remoteId,
  89               eventType,
  90               count: eventsForVideo[eventType]
  91             }
  92           })
  93         })
  94       })
  95     })
  96
  97     return requestsToMakeGrouped
  98   }
  99
 100   createRequest ({ type, videoId, count, transaction }: RequestVideoEventSchedulerOptions, callback: (err: Error) => void) {
 101     if (count === undefined) count = 1
 102
 103     const dbRequestOptions: Sequelize.CreateOptions = {}
 104     if (transaction) dbRequestOptions.transaction = transaction
 105
 106     const createQuery = {
 107       type,
 108       count,
 109       videoId
 110     }
 111
 112     return db.RequestVideoEvent.create(createQuery, dbRequestOptions).asCallback(callback)
 113   }
 114 }
 115
 116 // ---------------------------------------------------------------------------
 117
 118 export {
 119   RequestVideoEventScheduler
 120 }