server/lib/activitypub/video-comments.ts

   1 import { VideoCommentObject } from '../../../shared/models/activitypub/objects/video-comment-object'
   2 import { sanitizeAndCheckVideoCommentObject } from '../../helpers/custom-validators/activitypub/video-comments'
   3 import { logger } from '../../helpers/logger'
   4 import { doRequest } from '../../helpers/requests'
   5 import { ACTIVITY_PUB, CRAWL_REQUEST_CONCURRENCY } from '../../initializers/constants'
   6 import { ActorModel } from '../../models/activitypub/actor'
   7 import { VideoModel } from '../../models/video/video'
   8 import { VideoCommentModel } from '../../models/video/video-comment'
   9 import { getOrCreateActorAndServerAndModel } from './actor'
  10 import { getOrCreateVideoAndAccountAndChannel } from './videos'
  11 import * as Bluebird from 'bluebird'
  12 import { checkUrlsSameHost } from '../../helpers/activitypub'
  13
  14 async function videoCommentActivityObjectToDBAttributes (video: VideoModel, actor: ActorModel, comment: VideoCommentObject) {
  15   let originCommentId: number = null
  16   let inReplyToCommentId: number = null
  17
  18   // If this is not a reply to the video (thread), create or get the parent comment
  19   if (video.url !== comment.inReplyTo) {
  20     const { comment: parent } = await addVideoComment(video, comment.inReplyTo)
  21     if (!parent) {
  22       logger.warn('Cannot fetch or get parent comment %s of comment %s.', comment.inReplyTo, comment.id)
  23       return undefined
  24     }
  25
  26     originCommentId = parent.originCommentId || parent.id
  27     inReplyToCommentId = parent.id
  28   }
  29
  30   return {
  31     url: comment.id,
  32     text: comment.content,
  33     videoId: video.id,
  34     accountId: actor.Account.id,
  35     inReplyToCommentId,
  36     originCommentId,
  37     createdAt: new Date(comment.published)
  38   }
  39 }
  40
  41 async function addVideoComments (commentUrls: string[], instance: VideoModel) {
  42   return Bluebird.map(commentUrls, commentUrl => {
  43     return addVideoComment(instance, commentUrl)
  44   }, { concurrency: CRAWL_REQUEST_CONCURRENCY })
  45 }
  46
  47 async function addVideoComment (videoInstance: VideoModel, commentUrl: string) {
  48   logger.info('Fetching remote video comment %s.', commentUrl)
  49
  50   const { body } = await doRequest({
  51     uri: commentUrl,
  52     json: true,
  53     activityPub: true
  54   })
  55
  56   if (sanitizeAndCheckVideoCommentObject(body) === false) {
  57     logger.debug('Remote video comment JSON is not valid.', { body })
  58     return { created: false }
  59   }
  60
  61   const actorUrl = body.attributedTo
  62   if (!actorUrl) return { created: false }
  63
  64   if (checkUrlsSameHost(commentUrl, actorUrl) !== true) {
  65     throw new Error(`Actor url ${actorUrl} has not the same host than the comment url ${commentUrl}`)
  66   }
  67
  68   if (checkUrlsSameHost(body.id, commentUrl) !== true) {
  69     throw new Error(`Comment url ${commentUrl} host is different from the AP object id ${body.id}`)
  70   }
  71
  72   const actor = await getOrCreateActorAndServerAndModel(actorUrl, 'all')
  73   const entry = await videoCommentActivityObjectToDBAttributes(videoInstance, actor, body)
  74   if (!entry) return { created: false }
  75
  76   const [ comment, created ] = await VideoCommentModel.upsert<VideoCommentModel>(entry, { returning: true })
  77   comment.Account = actor.Account
  78   comment.Video = videoInstance
  79
  80   return { comment, created }
  81 }
  82
  83 type ResolveThreadResult = Promise<{ video: VideoModel, parents: VideoCommentModel[] }>
  84 async function resolveThread (url: string, comments: VideoCommentModel[] = []): ResolveThreadResult {
  85    // Already have this comment?
  86   const commentFromDatabase = await VideoCommentModel.loadByUrlAndPopulateReplyAndVideo(url)
  87   if (commentFromDatabase) {
  88     let parentComments = comments.concat([ commentFromDatabase ])
  89
  90     // Speed up things and resolve directly the thread
  91     if (commentFromDatabase.InReplyToVideoComment) {
  92       const data = await VideoCommentModel.listThreadParentComments(commentFromDatabase, undefined, 'DESC')
  93
  94       parentComments = parentComments.concat(data)
  95     }
  96
  97     return resolveThread(commentFromDatabase.Video.url, parentComments)
  98   }
  99
 100   try {
 101     // Maybe it's a reply to a video?
 102     // If yes, it's done: we resolved all the thread
 103     const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: url })
 104
 105     if (comments.length !== 0) {
 106       const firstReply = comments[ comments.length - 1 ]
 107       firstReply.inReplyToCommentId = null
 108       firstReply.originCommentId = null
 109       firstReply.videoId = video.id
 110       comments[comments.length - 1] = await firstReply.save()
 111
 112       for (let i = comments.length - 2; i >= 0; i--) {
 113         const comment = comments[ i ]
 114         comment.originCommentId = firstReply.id
 115         comment.inReplyToCommentId = comments[ i + 1 ].id
 116         comment.videoId = video.id
 117
 118         comments[i] = await comment.save()
 119       }
 120     }
 121
 122     return { video, parents: comments }
 123   } catch (err) {
 124     logger.debug('Cannot get or create account and video and channel for reply %s, fetch comment', url, { err })
 125
 126     if (comments.length > ACTIVITY_PUB.MAX_RECURSION_COMMENTS) {
 127       throw new Error('Recursion limit reached when resolving a thread')
 128     }
 129
 130     const { body } = await doRequest({
 131       uri: url,
 132       json: true,
 133       activityPub: true
 134     })
 135
 136     if (sanitizeAndCheckVideoCommentObject(body) === false) {
 137       throw new Error('Remote video comment JSON is not valid :' + JSON.stringify(body))
 138     }
 139
 140     const actorUrl = body.attributedTo
 141     if (!actorUrl) throw new Error('Miss attributed to in comment')
 142
 143     if (checkUrlsSameHost(url, actorUrl) !== true) {
 144       throw new Error(`Actor url ${actorUrl} has not the same host than the comment url ${url}`)
 145     }
 146
 147     if (checkUrlsSameHost(body.id, url) !== true) {
 148       throw new Error(`Comment url ${url} host is different from the AP object id ${body.id}`)
 149     }
 150
 151     const actor = await getOrCreateActorAndServerAndModel(actorUrl)
 152     const comment = new VideoCommentModel({
 153       url: body.id,
 154       text: body.content,
 155       videoId: null,
 156       accountId: actor.Account.id,
 157       inReplyToCommentId: null,
 158       originCommentId: null,
 159       createdAt: new Date(body.published),
 160       updatedAt: new Date(body.updated)
 161     })
 162
 163     return resolveThread(body.inReplyTo, comments.concat([ comment ]))
 164   }
 165 }
 166
 167 export {
 168   videoCommentActivityObjectToDBAttributes,
 169   addVideoComments,
 170   addVideoComment,
 171   resolveThread
 172 }