server/lib/activitypub/videos.ts

   1 import * as magnetUtil from 'magnet-uri'
   2 import { join } from 'path'
   3 import * as request from 'request'
   4 import { ActivityIconObject } from '../../../shared/index'
   5 import { VideoTorrentObject } from '../../../shared/models/activitypub/objects'
   6 import { VideoPrivacy } from '../../../shared/models/videos'
   7 import { isVideoTorrentObjectValid } from '../../helpers/custom-validators/activitypub/videos'
   8 import { isVideoFileInfoHashValid } from '../../helpers/custom-validators/videos'
   9 import { retryTransactionWrapper } from '../../helpers/database-utils'
  10 import { logger } from '../../helpers/logger'
  11 import { doRequest, doRequestAndSaveToFile } from '../../helpers/requests'
  12 import { ACTIVITY_PUB, CONFIG, REMOTE_SCHEME, sequelizeTypescript, STATIC_PATHS, VIDEO_MIMETYPE_EXT } from '../../initializers'
  13 import { ActorModel } from '../../models/activitypub/actor'
  14 import { TagModel } from '../../models/video/tag'
  15 import { VideoModel } from '../../models/video/video'
  16 import { VideoChannelModel } from '../../models/video/video-channel'
  17 import { VideoFileModel } from '../../models/video/video-file'
  18 import { VideoShareModel } from '../../models/video/video-share'
  19 import { getOrCreateActorAndServerAndModel } from './actor'
  20
  21 function fetchRemoteVideoPreview (video: VideoModel, reject: Function) {
  22   const host = video.VideoChannel.Account.Actor.Server.host
  23   const path = join(STATIC_PATHS.PREVIEWS, video.getPreviewName())
  24
  25   // We need to provide a callback, if no we could have an uncaught exception
  26   return request.get(REMOTE_SCHEME.HTTP + '://' + host + path, err => {
  27     if (err) reject(err)
  28   })
  29 }
  30
  31 async function fetchRemoteVideoDescription (video: VideoModel) {
  32   const host = video.VideoChannel.Account.Actor.Server.host
  33   const path = video.getDescriptionPath()
  34   const options = {
  35     uri: REMOTE_SCHEME.HTTP + '://' + host + path,
  36     json: true
  37   }
  38
  39   const { body } = await doRequest(options)
  40   return body.description ? body.description : ''
  41 }
  42
  43 function generateThumbnailFromUrl (video: VideoModel, icon: ActivityIconObject) {
  44   const thumbnailName = video.getThumbnailName()
  45   const thumbnailPath = join(CONFIG.STORAGE.THUMBNAILS_DIR, thumbnailName)
  46
  47   const options = {
  48     method: 'GET',
  49     uri: icon.url
  50   }
  51   return doRequestAndSaveToFile(options, thumbnailPath)
  52 }
  53
  54 async function videoActivityObjectToDBAttributes (videoChannel: VideoChannelModel,
  55                                                   videoObject: VideoTorrentObject,
  56                                                   to: string[] = [],
  57                                                   cc: string[] = []) {
  58   let privacy = VideoPrivacy.PRIVATE
  59   if (to.indexOf(ACTIVITY_PUB.PUBLIC) !== -1) privacy = VideoPrivacy.PUBLIC
  60   else if (cc.indexOf(ACTIVITY_PUB.PUBLIC) !== -1) privacy = VideoPrivacy.UNLISTED
  61
  62   const duration = videoObject.duration.replace(/[^\d]+/, '')
  63   let language = null
  64   if (videoObject.language) {
  65     language = parseInt(videoObject.language.identifier, 10)
  66   }
  67
  68   let category = null
  69   if (videoObject.category) {
  70     category = parseInt(videoObject.category.identifier, 10)
  71   }
  72
  73   let licence = null
  74   if (videoObject.licence) {
  75     licence = parseInt(videoObject.licence.identifier, 10)
  76   }
  77
  78   let description = null
  79   if (videoObject.content) {
  80     description = videoObject.content
  81   }
  82
  83   return {
  84     name: videoObject.name,
  85     uuid: videoObject.uuid,
  86     url: videoObject.id,
  87     category,
  88     licence,
  89     language,
  90     description,
  91     nsfw: videoObject.nsfw,
  92     commentsEnabled: videoObject.commentsEnabled,
  93     channelId: videoChannel.id,
  94     duration: parseInt(duration, 10),
  95     createdAt: new Date(videoObject.published),
  96     // FIXME: updatedAt does not seems to be considered by Sequelize
  97     updatedAt: new Date(videoObject.updated),
  98     views: videoObject.views,
  99     likes: 0,
 100     dislikes: 0,
 101     remote: true,
 102     privacy
 103   }
 104 }
 105
 106 function videoFileActivityUrlToDBAttributes (videoCreated: VideoModel, videoObject: VideoTorrentObject) {
 107   const mimeTypes = Object.keys(VIDEO_MIMETYPE_EXT)
 108   const fileUrls = videoObject.url.filter(u => {
 109     return mimeTypes.indexOf(u.mimeType) !== -1 && u.mimeType.startsWith('video/')
 110   })
 111
 112   if (fileUrls.length === 0) {
 113     throw new Error('Cannot find video files for ' + videoCreated.url)
 114   }
 115
 116   const attributes = []
 117   for (const fileUrl of fileUrls) {
 118     // Fetch associated magnet uri
 119     const magnet = videoObject.url.find(u => {
 120       return u.mimeType === 'application/x-bittorrent;x-scheme-handler/magnet' && u.width === fileUrl.width
 121     })
 122
 123     if (!magnet) throw new Error('Cannot find associated magnet uri for file ' + fileUrl.href)
 124
 125     const parsed = magnetUtil.decode(magnet.href)
 126     if (!parsed || isVideoFileInfoHashValid(parsed.infoHash) === false) throw new Error('Cannot parse magnet URI ' + magnet.href)
 127
 128     const attribute = {
 129       extname: VIDEO_MIMETYPE_EXT[ fileUrl.mimeType ],
 130       infoHash: parsed.infoHash,
 131       resolution: fileUrl.width,
 132       size: fileUrl.size,
 133       videoId: videoCreated.id
 134     }
 135     attributes.push(attribute)
 136   }
 137
 138   return attributes
 139 }
 140
 141 async function getOrCreateVideo (videoObject: VideoTorrentObject, channelActor: ActorModel) {
 142   logger.debug('Adding remote video %s.', videoObject.id)
 143
 144   return sequelizeTypescript.transaction(async t => {
 145     const sequelizeOptions = {
 146       transaction: t
 147     }
 148     const videoFromDatabase = await VideoModel.loadByUUIDOrURLAndPopulateAccount(videoObject.uuid, videoObject.id, t)
 149     if (videoFromDatabase) return videoFromDatabase
 150
 151     const videoData = await videoActivityObjectToDBAttributes(channelActor.VideoChannel, videoObject, videoObject.to, videoObject.cc)
 152     const video = VideoModel.build(videoData)
 153
 154     // Don't block on request
 155     generateThumbnailFromUrl(video, videoObject.icon)
 156       .catch(err => logger.warn('Cannot generate thumbnail of %s.', videoObject.id, err))
 157
 158     const videoCreated = await video.save(sequelizeOptions)
 159
 160     const videoFileAttributes = videoFileActivityUrlToDBAttributes(videoCreated, videoObject)
 161     if (videoFileAttributes.length === 0) {
 162       throw new Error('Cannot find valid files for video %s ' + videoObject.url)
 163     }
 164
 165     const tasks = videoFileAttributes.map(f => VideoFileModel.create(f, { transaction: t }))
 166     await Promise.all(tasks)
 167
 168     const tags = videoObject.tag.map(t => t.name)
 169     const tagInstances = await TagModel.findOrCreateTags(tags, t)
 170     await videoCreated.$set('Tags', tagInstances, sequelizeOptions)
 171
 172     logger.info('Remote video with uuid %s inserted.', videoObject.uuid)
 173
 174     videoCreated.VideoChannel = channelActor.VideoChannel
 175     return videoCreated
 176   })
 177 }
 178
 179 async function getOrCreateAccountAndVideoAndChannel (videoObject: VideoTorrentObject | string, actor?: ActorModel) {
 180   if (typeof videoObject === 'string') {
 181     const videoFromDatabase = await VideoModel.loadByUrlAndPopulateAccount(videoObject)
 182     if (videoFromDatabase) {
 183       return {
 184         video: videoFromDatabase,
 185         actor: videoFromDatabase.VideoChannel.Account.Actor,
 186         channelActor: videoFromDatabase.VideoChannel.Actor
 187       }
 188     }
 189
 190     videoObject = await fetchRemoteVideo(videoObject)
 191     if (!videoObject) throw new Error('Cannot fetch remote video')
 192   }
 193
 194   if (!actor) {
 195     const actorObj = videoObject.attributedTo.find(a => a.type === 'Person')
 196     if (!actorObj) throw new Error('Cannot find associated actor to video ' + videoObject.url)
 197
 198     actor = await getOrCreateActorAndServerAndModel(actorObj.id)
 199   }
 200
 201   const channel = videoObject.attributedTo.find(a => a.type === 'Group')
 202   if (!channel) throw new Error('Cannot find associated video channel to video ' + videoObject.url)
 203
 204   const channelActor = await getOrCreateActorAndServerAndModel(channel.id)
 205
 206   const options = {
 207     arguments: [ videoObject, channelActor ],
 208     errorMessage: 'Cannot insert the remote video with many retries.'
 209   }
 210
 211   const video = await retryTransactionWrapper(getOrCreateVideo, options)
 212
 213   return { actor, channelActor, video }
 214 }
 215
 216 async function addVideoShares (instance: VideoModel, shareUrls: string[]) {
 217   for (const shareUrl of shareUrls) {
 218     // Fetch url
 219     const { body } = await doRequest({
 220       uri: shareUrl,
 221       json: true,
 222       activityPub: true
 223     })
 224     const actorUrl = body.actor
 225     if (!actorUrl) continue
 226
 227     const actor = await getOrCreateActorAndServerAndModel(actorUrl)
 228
 229     const entry = {
 230       actorId: actor.id,
 231       videoId: instance.id
 232     }
 233
 234     await VideoShareModel.findOrCreate({
 235       where: entry,
 236       defaults: entry
 237     })
 238   }
 239 }
 240
 241 export {
 242   getOrCreateAccountAndVideoAndChannel,
 243   fetchRemoteVideoPreview,
 244   fetchRemoteVideoDescription,
 245   generateThumbnailFromUrl,
 246   videoActivityObjectToDBAttributes,
 247   videoFileActivityUrlToDBAttributes,
 248   getOrCreateVideo,
 249   addVideoShares}
 250
 251 // ---------------------------------------------------------------------------
 252
 253 async function fetchRemoteVideo (videoUrl: string): Promise<VideoTorrentObject> {
 254   const options = {
 255     uri: videoUrl,
 256     method: 'GET',
 257     json: true,
 258     activityPub: true
 259   }
 260
 261   logger.info('Fetching remote video %s.', videoUrl)
 262
 263   const { body } = await doRequest(options)
 264
 265   if (isVideoTorrentObjectValid(body) === false) {
 266     logger.debug('Remote video JSON is not valid.', { body })
 267     return undefined
 268   }
 269
 270   return body
 271 }