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 { RequestsVideoEventGrouped } from '../../models'
  11 import { RequestVideoEventType } from '../../../shared'
  12
  13 export type RequestVideoEventSchedulerOptions = {
  14   type: RequestVideoEventType
  15   videoId: string
  16   count?: number
  17   transaction?: Sequelize.Transaction
  18 }
  19
  20 class RequestVideoEventScheduler extends AbstractRequestScheduler<RequestsVideoEventGrouped> {
  21   constructor () {
  22     super()
  23
  24     // We limit the size of the requests
  25     this.limitPods = REQUESTS_VIDEO_EVENT_LIMIT_PODS
  26     this.limitPerPod = REQUESTS_VIDEO_EVENT_LIMIT_PER_POD
  27
  28     this.description = 'video event requests'
  29   }
  30
  31   getRequestModel () {
  32     return db.RequestVideoEvent
  33   }
  34
  35   getRequestToPodModel () {
  36     return db.RequestVideoEvent
  37   }
  38
  39   buildRequestObjects (eventRequests: RequestsVideoEventGrouped) {
  40     const requestsToMakeGrouped = {}
  41
  42     /* Example:
  43         {
  44           pod1: {
  45             video1: { views: 4, likes: 5 },
  46             video2: { likes: 5 }
  47           }
  48         }
  49     */
  50     const eventsPerVideoPerPod = {}
  51
  52     // We group video events per video and per pod
  53     // We add the counts of the same event types
  54     Object.keys(eventRequests).forEach(toPodId => {
  55       eventRequests[toPodId].forEach(eventToProcess => {
  56         if (!eventsPerVideoPerPod[toPodId]) eventsPerVideoPerPod[toPodId] = {}
  57
  58         if (!requestsToMakeGrouped[toPodId]) {
  59           requestsToMakeGrouped[toPodId] = {
  60             toPod: eventToProcess.pod,
  61             endpoint: REQUEST_VIDEO_EVENT_ENDPOINT,
  62             ids: [], // request ids, to delete them from the DB in the future
  63             datas: [] // requests data
  64           }
  65         }
  66         requestsToMakeGrouped[toPodId].ids.push(eventToProcess.id)
  67
  68         const eventsPerVideo = eventsPerVideoPerPod[toPodId]
  69         const remoteId = eventToProcess.video.remoteId
  70         if (!eventsPerVideo[remoteId]) eventsPerVideo[remoteId] = {}
  71
  72         const events = eventsPerVideo[remoteId]
  73         if (!events[eventToProcess.type]) events[eventToProcess.type] = 0
  74
  75         events[eventToProcess.type] += eventToProcess.count
  76       })
  77     })
  78
  79     // Now we build our requests array per pod
  80     Object.keys(eventsPerVideoPerPod).forEach(toPodId => {
  81       const eventsForPod = eventsPerVideoPerPod[toPodId]
  82
  83       Object.keys(eventsForPod).forEach(remoteId => {
  84         const eventsForVideo = eventsForPod[remoteId]
  85
  86         Object.keys(eventsForVideo).forEach(eventType => {
  87           requestsToMakeGrouped[toPodId].datas.push({
  88             data: {
  89               remoteId,
  90               eventType,
  91               count: eventsForVideo[eventType]
  92             }
  93           })
  94         })
  95       })
  96     })
  97
  98     return requestsToMakeGrouped
  99   }
 100
 101   createRequest ({ type, videoId, count, transaction }: RequestVideoEventSchedulerOptions) {
 102     if (count === undefined) count = 1
 103
 104     const dbRequestOptions: Sequelize.CreateOptions = {}
 105     if (transaction) dbRequestOptions.transaction = transaction
 106
 107     const createQuery = {
 108       type,
 109       count,
 110       videoId
 111     }
 112
 113     return db.RequestVideoEvent.create(createQuery, dbRequestOptions)
 114   }
 115 }
 116
 117 // ---------------------------------------------------------------------------
 118
 119 export {
 120   RequestVideoEventScheduler
 121 }