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'
   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     updatedAt: new Date(comment.updated)
  39   }
  40 }
  41
  42 async function addVideoComments (commentUrls: string[], instance: VideoModel) {
  43   return Bluebird.map(commentUrls, commentUrl => {
  44     return addVideoComment(instance, commentUrl)
  45   }, { concurrency: CRAWL_REQUEST_CONCURRENCY })
  46 }
  47
  48 async function addVideoComment (videoInstance: VideoModel, commentUrl: string) {
  49   logger.info('Fetching remote video comment %s.', commentUrl)
  50
  51   const { body } = await doRequest({
  52     uri: commentUrl,
  53     json: true,
  54     activityPub: true
  55   })
  56
  57   if (sanitizeAndCheckVideoCommentObject(body) === false) {
  58     logger.debug('Remote video comment JSON is not valid.', { body })
  59     return { created: false }
  60   }
  61
  62   const actorUrl = body.attributedTo
  63   if (!actorUrl) return { created: false }
  64
  65   if (checkUrlsSameHost(commentUrl, actorUrl) !== true) {
  66     throw new Error(`Actor url ${actorUrl} has not the same host than the comment url ${commentUrl}`)
  67   }
  68
  69   if (checkUrlsSameHost(body.id, commentUrl) !== true) {
  70     throw new Error(`Comment url ${commentUrl} host is different from the AP object id ${body.id}`)
  71   }
  72
  73   const actor = await getOrCreateActorAndServerAndModel(actorUrl)
  74   const entry = await videoCommentActivityObjectToDBAttributes(videoInstance, actor, body)
  75   if (!entry) return { created: false }
  76
  77   const [ comment, created ] = await VideoCommentModel.findOrCreate({
  78     where: {
  79       url: body.id
  80     },
  81     defaults: entry
  82   })
  83
  84   return { comment, created }
  85 }
  86
  87 async function resolveThread (url: string, comments: VideoCommentModel[] = []) {
  88    // Already have this comment?
  89   const commentFromDatabase = await VideoCommentModel.loadByUrlAndPopulateReplyAndVideo(url)
  90   if (commentFromDatabase) {
  91     let parentComments = comments.concat([ commentFromDatabase ])
  92
  93     // Speed up things and resolve directly the thread
  94     if (commentFromDatabase.InReplyToVideoComment) {
  95       const data = await VideoCommentModel.listThreadParentComments(commentFromDatabase, undefined, 'DESC')
  96
  97       parentComments = parentComments.concat(data)
  98     }
  99
 100     return resolveThread(commentFromDatabase.Video.url, parentComments)
 101   }
 102
 103   try {
 104     // Maybe it's a reply to a video?
 105     // If yes, it's done: we resolved all the thread
 106     const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: url })
 107
 108     if (comments.length !== 0) {
 109       const firstReply = comments[ comments.length - 1 ]
 110       firstReply.inReplyToCommentId = null
 111       firstReply.originCommentId = null
 112       firstReply.videoId = video.id
 113       comments[comments.length - 1] = await firstReply.save()
 114
 115       for (let i = comments.length - 2; i >= 0; i--) {
 116         const comment = comments[ i ]
 117         comment.originCommentId = firstReply.id
 118         comment.inReplyToCommentId = comments[ i + 1 ].id
 119         comment.videoId = video.id
 120
 121         comments[i] = await comment.save()
 122       }
 123     }
 124
 125     return { video, parents: comments }
 126   } catch (err) {
 127     logger.debug('Cannot get or create account and video and channel for reply %s, fetch comment', url, { err })
 128
 129     if (comments.length > ACTIVITY_PUB.MAX_RECURSION_COMMENTS) {
 130       throw new Error('Recursion limit reached when resolving a thread')
 131     }
 132
 133     const { body } = await doRequest({
 134       uri: url,
 135       json: true,
 136       activityPub: true
 137     })
 138
 139     if (sanitizeAndCheckVideoCommentObject(body) === false) {
 140       throw new Error('Remote video comment JSON is not valid :' + JSON.stringify(body))
 141     }
 142
 143     const actorUrl = body.attributedTo
 144     if (!actorUrl) throw new Error('Miss attributed to in comment')
 145
 146     if (checkUrlsSameHost(url, actorUrl) !== true) {
 147       throw new Error(`Actor url ${actorUrl} has not the same host than the comment url ${url}`)
 148     }
 149
 150     if (checkUrlsSameHost(body.id, url) !== true) {
 151       throw new Error(`Comment url ${url} host is different from the AP object id ${body.id}`)
 152     }
 153
 154     const actor = await getOrCreateActorAndServerAndModel(actorUrl)
 155     const comment = new VideoCommentModel({
 156       url: body.id,
 157       text: body.content,
 158       videoId: null,
 159       accountId: actor.Account.id,
 160       inReplyToCommentId: null,
 161       originCommentId: null,
 162       createdAt: new Date(body.published),
 163       updatedAt: new Date(body.updated)
 164     })
 165
 166     return resolveThread(body.inReplyTo, comments.concat([ comment ]))
 167   }
 168
 169 }
 170
 171 export {
 172   videoCommentActivityObjectToDBAttributes,
 173   addVideoComments,
 174   addVideoComment,
 175   resolveThread
 176 }