peertube/server/lib/activitypub/send/send-undo.ts

import { Transaction } from 'sequelize'
import {
  ActivityAnnounce,
  ActivityAudience,
  ActivityCreate,
  ActivityFollow,
  ActivityLike,
  ActivityUndo
} from '../../../../shared/models/activitypub'
import { ActorModel } from '../../../models/activitypub/actor'
import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
import { VideoModel } from '../../../models/video/video'
import { getActorFollowActivityPubUrl, getUndoActivityPubUrl, getVideoDislikeActivityPubUrl, getVideoLikeActivityPubUrl } from '../url'
import { broadcastToFollowers, unicastTo } from './utils'
import { audiencify, getActorsInvolvedInVideo, getAudience, getObjectFollowersAudience, getVideoAudience } from '../audience'
import { buildCreateActivity, buildDislikeActivity } from './send-create'
import { buildFollowActivity } from './send-follow'
import { buildLikeActivity } from './send-like'
import { VideoShareModel } from '../../../models/video/video-share'
import { buildAnnounceWithVideoAudience } from './send-announce'
import { logger } from '../../../helpers/logger'
import { VideoRedundancyModel } from '../../../models/redundancy/video-redundancy'

async function sendUndoFollow (actorFollow: ActorFollowModel, t: Transaction) {
  const me = actorFollow.ActorFollower
  const following = actorFollow.ActorFollowing

  // Same server as ours
  if (!following.serverId) return

  logger.info('Creating job to send an unfollow request to %s.', following.url)

  const followUrl = getActorFollowActivityPubUrl(actorFollow)
  const undoUrl = getUndoActivityPubUrl(followUrl)

  const followActivity = buildFollowActivity(followUrl, me, following)
  const undoActivity = undoActivityData(undoUrl, me, followActivity)

  return unicastTo(undoActivity, me, following.inboxUrl)
}

async function sendUndoLike (byActor: ActorModel, video: VideoModel, t: Transaction) {
  logger.info('Creating job to undo a like of video %s.', video.url)

  const likeUrl = getVideoLikeActivityPubUrl(byActor, video)
  const undoUrl = getUndoActivityPubUrl(likeUrl)

  const actorsInvolvedInVideo = await getActorsInvolvedInVideo(video, t)
  const likeActivity = buildLikeActivity(likeUrl, byActor, video)

  // Send to origin
  if (video.isOwned() === false) {
    const audience = getVideoAudience(video, actorsInvolvedInVideo)
    const undoActivity = undoActivityData(undoUrl, byActor, likeActivity, audience)

    return unicastTo(undoActivity, byActor, video.VideoChannel.Account.Actor.sharedInboxUrl)
  }

  const audience = getObjectFollowersAudience(actorsInvolvedInVideo)
  const undoActivity = undoActivityData(undoUrl, byActor, likeActivity, audience)

  const followersException = [ byActor ]
  return broadcastToFollowers(undoActivity, byActor, actorsInvolvedInVideo, t, followersException)
}

async function sendUndoDislike (byActor: ActorModel, video: VideoModel, t: Transaction) {
  logger.info('Creating job to undo a dislike of video %s.', video.url)

  const dislikeUrl = getVideoDislikeActivityPubUrl(byActor, video)
  const undoUrl = getUndoActivityPubUrl(dislikeUrl)

  const actorsInvolvedInVideo = await getActorsInvolvedInVideo(video, t)
  const dislikeActivity = buildDislikeActivity(byActor, video)
  const createDislikeActivity = buildCreateActivity(dislikeUrl, byActor, dislikeActivity)

  if (video.isOwned() === false) {
    const audience = getVideoAudience(video, actorsInvolvedInVideo)
    const undoActivity = undoActivityData(undoUrl, byActor, createDislikeActivity, audience)

    return unicastTo(undoActivity, byActor, video.VideoChannel.Account.Actor.sharedInboxUrl)
  }

  const undoActivity = undoActivityData(undoUrl, byActor, createDislikeActivity)

  const followersException = [ byActor ]
  return broadcastToFollowers(undoActivity, byActor, actorsInvolvedInVideo, t, followersException)
}

async function sendUndoAnnounce (byActor: ActorModel, videoShare: VideoShareModel, video: VideoModel, t: Transaction) {
  logger.info('Creating job to undo announce %s.', videoShare.url)

  const undoUrl = getUndoActivityPubUrl(videoShare.url)

  const { activity: announceActivity, actorsInvolvedInVideo } = await buildAnnounceWithVideoAudience(byActor, videoShare, video, t)
  const undoActivity = undoActivityData(undoUrl, byActor, announceActivity)

  const followersException = [ byActor ]
  return broadcastToFollowers(undoActivity, byActor, actorsInvolvedInVideo, t, followersException)
}

async function sendUndoCacheFile (byActor: ActorModel, redundancyModel: VideoRedundancyModel, t: Transaction) {
  logger.info('Creating job to undo cache file %s.', redundancyModel.url)

  const undoUrl = getUndoActivityPubUrl(redundancyModel.url)

  const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(redundancyModel.VideoFile.Video.id)
  const actorsInvolvedInVideo = await getActorsInvolvedInVideo(video, t)

  const audience = getVideoAudience(video, actorsInvolvedInVideo)
  const createActivity = buildCreateActivity(redundancyModel.url, byActor, redundancyModel.toActivityPubObject())

  const undoActivity = undoActivityData(undoUrl, byActor, createActivity, audience)

  return unicastTo(undoActivity, byActor, video.VideoChannel.Account.Actor.sharedInboxUrl)
}

// ---------------------------------------------------------------------------

export {
  sendUndoFollow,
  sendUndoLike,
  sendUndoDislike,
  sendUndoAnnounce,
  sendUndoCacheFile
}

// ---------------------------------------------------------------------------

function undoActivityData (
  url: string,
  byActor: ActorModel,
  object: ActivityFollow | ActivityLike | ActivityCreate | ActivityAnnounce,
  audience?: ActivityAudience
): ActivityUndo {
  if (!audience) audience = getAudience(byActor)

  return audiencify(
    {
      type: 'Undo' as 'Undo',
      id: url,
      actor: byActor.url,
      object
    },
    audience
  )
}