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'use strict'
const BaseRequestScheduler = require('./base-request-scheduler')
const constants = require('../initializers/constants')
const db = require('../initializers/database')
module.exports = class RequestVideoEventScheduler extends BaseRequestScheduler {
constructor () {
super()
// We limit the size of the requests
this.limitPods = constants.REQUESTS_VIDEO_EVENT_LIMIT_PODS
this.limitPerPod = constants.REQUESTS_VIDEO_EVENT_LIMIT_PER_POD
this.description = 'video event requests'
}
getRequestModel () {
return db.RequestVideoEvent
}
getRequestToPodModel () {
return db.RequestVideoEvent
}
buildRequestObjects (eventsToProcess) {
const requestsToMakeGrouped = {}
/* Example:
{
pod1: {
video1: { views: 4, likes: 5 },
video2: { likes: 5 }
}
}
*/
const eventsPerVideoPerPod = {}
// We group video events per video and per pod
// We add the counts of the same event types
Object.keys(eventsToProcess).forEach(toPodId => {
eventsToProcess[toPodId].forEach(eventToProcess => {
if (!eventsPerVideoPerPod[toPodId]) eventsPerVideoPerPod[toPodId] = {}
if (!requestsToMakeGrouped[toPodId]) {
requestsToMakeGrouped[toPodId] = {
toPod: eventToProcess.pod,
endpoint: constants.REQUEST_ENDPOINTS.EVENT,
ids: [], // request ids, to delete them from the DB in the future
datas: [] // requests data
}
}
requestsToMakeGrouped[toPodId].ids.push(eventToProcess.id)
const eventsPerVideo = eventsPerVideoPerPod[toPodId]
const remoteId = eventToProcess.video.remoteId
if (!eventsPerVideo[remoteId]) eventsPerVideo[remoteId] = {}
const events = eventsPerVideo[remoteId]
if (!events[eventToProcess.type]) events[eventToProcess.type] = 0
events[eventToProcess.type] += eventToProcess.count
})
})
// Now we build our requests array per pod
Object.keys(eventsPerVideoPerPod).forEach(toPodId => {
const eventsForPod = eventsPerVideoPerPod[toPodId]
Object.keys(eventsForPod).forEach(remoteId => {
const eventsForVideo = eventsForPod[remoteId]
Object.keys(eventsForVideo).forEach(eventType => {
requestsToMakeGrouped[toPodId].datas.push({
data: {
remoteId,
eventType,
count: eventsForVideo[eventType]
}
})
})
})
})
return requestsToMakeGrouped
}
// { type, videoId, count?, transaction? }
createRequest (options, callback) {
const type = options.type
const videoId = options.videoId
const transaction = options.transaction
let count = options.count
if (count === undefined) count = 1
const dbRequestOptions = {}
if (transaction) dbRequestOptions.transaction = transaction
const createQuery = {
type,
count,
videoId
}
return db.RequestVideoEvent.create(createQuery, dbRequestOptions).asCallback(callback)
}
}
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