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 async function resolveThread (url: string, comments: VideoCommentModel[] = []) {
  84    // Already have this comment?
  85   const commentFromDatabase = await VideoCommentModel.loadByUrlAndPopulateReplyAndVideo(url)
  86   if (commentFromDatabase) {
  87     let parentComments = comments.concat([ commentFromDatabase ])
  88
  89     // Speed up things and resolve directly the thread
  90     if (commentFromDatabase.InReplyToVideoComment) {
  91       const data = await VideoCommentModel.listThreadParentComments(commentFromDatabase, undefined, 'DESC')
  92
  93       parentComments = parentComments.concat(data)
  94     }
  95
  96     return resolveThread(commentFromDatabase.Video.url, parentComments)
  97   }
  98
  99   try {
 100     // Maybe it's a reply to a video?
 101     // If yes, it's done: we resolved all the thread
 102     const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: url })
 103
 104     if (comments.length !== 0) {
 105       const firstReply = comments[ comments.length - 1 ]
 106       firstReply.inReplyToCommentId = null
 107       firstReply.originCommentId = null
 108       firstReply.videoId = video.id
 109       comments[comments.length - 1] = await firstReply.save()
 110
 111       for (let i = comments.length - 2; i >= 0; i--) {
 112         const comment = comments[ i ]
 113         comment.originCommentId = firstReply.id
 114         comment.inReplyToCommentId = comments[ i + 1 ].id
 115         comment.videoId = video.id
 116
 117         comments[i] = await comment.save()
 118       }
 119     }
 120
 121     return { video, parents: comments }
 122   } catch (err) {
 123     logger.debug('Cannot get or create account and video and channel for reply %s, fetch comment', url, { err })
 124
 125     if (comments.length > ACTIVITY_PUB.MAX_RECURSION_COMMENTS) {
 126       throw new Error('Recursion limit reached when resolving a thread')
 127     }
 128
 129     const { body } = await doRequest({
 130       uri: url,
 131       json: true,
 132       activityPub: true
 133     })
 134
 135     if (sanitizeAndCheckVideoCommentObject(body) === false) {
 136       throw new Error('Remote video comment JSON is not valid :' + JSON.stringify(body))
 137     }
 138
 139     const actorUrl = body.attributedTo
 140     if (!actorUrl) throw new Error('Miss attributed to in comment')
 141
 142     if (checkUrlsSameHost(url, actorUrl) !== true) {
 143       throw new Error(`Actor url ${actorUrl} has not the same host than the comment url ${url}`)
 144     }
 145
 146     if (checkUrlsSameHost(body.id, url) !== true) {
 147       throw new Error(`Comment url ${url} host is different from the AP object id ${body.id}`)
 148     }
 149
 150     const actor = await getOrCreateActorAndServerAndModel(actorUrl)
 151     const comment = new VideoCommentModel({
 152       url: body.id,
 153       text: body.content,
 154       videoId: null,
 155       accountId: actor.Account.id,
 156       inReplyToCommentId: null,
 157       originCommentId: null,
 158       createdAt: new Date(body.published),
 159       updatedAt: new Date(body.updated)
 160     })
 161
 162     return resolveThread(body.inReplyTo, comments.concat([ comment ]))
 163   }
 164
 165 }
 166
 167 export {
 168   videoCommentActivityObjectToDBAttributes,
 169   addVideoComments,
 170   addVideoComment,
 171   resolveThread
 172 }