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