server/helpers/activitypub.ts

   1 import * as Bluebird from 'bluebird'
   2 import validator from 'validator'
   3 import { ResultList } from '../../shared/models'
   4 import { Activity } from '../../shared/models/activitypub'
   5 import { ACTIVITY_PUB, REMOTE_SCHEME } from '../initializers/constants'
   6 import { signJsonLDObject } from './peertube-crypto'
   7 import { pageToStartAndCount } from './core-utils'
   8 import { URL } from 'url'
   9 import { MActor, MVideoAccountLight } from '../types/models'
  10 import { ContextType } from '@shared/models/activitypub/context'
  11
  12 function getContextData (type: ContextType) {
  13   const context: any[] = [
  14     'https://www.w3.org/ns/activitystreams',
  15     'https://w3id.org/security/v1',
  16     {
  17       RsaSignature2017: 'https://w3id.org/security#RsaSignature2017'
  18     }
  19   ]
  20
  21   if (type !== 'View' && type !== 'Announce') {
  22     const additional = {
  23       pt: 'https://joinpeertube.org/ns#',
  24       sc: 'http://schema.org#'
  25     }
  26
  27     if (type === 'CacheFile') {
  28       Object.assign(additional, {
  29         expires: 'sc:expires',
  30         CacheFile: 'pt:CacheFile'
  31       })
  32     } else {
  33       Object.assign(additional, {
  34         Hashtag: 'as:Hashtag',
  35         uuid: 'sc:identifier',
  36         category: 'sc:category',
  37         licence: 'sc:license',
  38         subtitleLanguage: 'sc:subtitleLanguage',
  39         sensitive: 'as:sensitive',
  40         language: 'sc:inLanguage',
  41
  42         Infohash: 'pt:Infohash',
  43         Playlist: 'pt:Playlist',
  44         PlaylistElement: 'pt:PlaylistElement',
  45
  46         originallyPublishedAt: 'sc:datePublished',
  47         views: {
  48           '@type': 'sc:Number',
  49           '@id': 'pt:views'
  50         },
  51         state: {
  52           '@type': 'sc:Number',
  53           '@id': 'pt:state'
  54         },
  55         size: {
  56           '@type': 'sc:Number',
  57           '@id': 'pt:size'
  58         },
  59         fps: {
  60           '@type': 'sc:Number',
  61           '@id': 'pt:fps'
  62         },
  63         startTimestamp: {
  64           '@type': 'sc:Number',
  65           '@id': 'pt:startTimestamp'
  66         },
  67         stopTimestamp: {
  68           '@type': 'sc:Number',
  69           '@id': 'pt:stopTimestamp'
  70         },
  71         position: {
  72           '@type': 'sc:Number',
  73           '@id': 'pt:position'
  74         },
  75         commentsEnabled: {
  76           '@type': 'sc:Boolean',
  77           '@id': 'pt:commentsEnabled'
  78         },
  79         downloadEnabled: {
  80           '@type': 'sc:Boolean',
  81           '@id': 'pt:downloadEnabled'
  82         },
  83         waitTranscoding: {
  84           '@type': 'sc:Boolean',
  85           '@id': 'pt:waitTranscoding'
  86         },
  87         support: {
  88           '@type': 'sc:Text',
  89           '@id': 'pt:support'
  90         },
  91         likes: {
  92           '@id': 'as:likes',
  93           '@type': '@id'
  94         },
  95         dislikes: {
  96           '@id': 'as:dislikes',
  97           '@type': '@id'
  98         },
  99         playlists: {
 100           '@id': 'pt:playlists',
 101           '@type': '@id'
 102         },
 103         shares: {
 104           '@id': 'as:shares',
 105           '@type': '@id'
 106         },
 107         comments: {
 108           '@id': 'as:comments',
 109           '@type': '@id'
 110         }
 111       })
 112     }
 113
 114     context.push(additional)
 115   }
 116
 117   return {
 118     '@context': context
 119   }
 120 }
 121
 122 function activityPubContextify <T> (data: T, type: ContextType = 'All') {
 123   return Object.assign({}, data, getContextData(type))
 124 }
 125
 126 type ActivityPubCollectionPaginationHandler = (start: number, count: number) => Bluebird<ResultList<any>> | Promise<ResultList<any>>
 127 async function activityPubCollectionPagination (
 128   baseUrl: string,
 129   handler: ActivityPubCollectionPaginationHandler,
 130   page?: any,
 131   size = ACTIVITY_PUB.COLLECTION_ITEMS_PER_PAGE
 132 ) {
 133   if (!page || !validator.isInt(page)) {
 134     // We just display the first page URL, we only need the total items
 135     const result = await handler(0, 1)
 136
 137     return {
 138       id: baseUrl,
 139       type: 'OrderedCollectionPage',
 140       totalItems: result.total,
 141       first: baseUrl + '?page=1'
 142     }
 143   }
 144
 145   const { start, count } = pageToStartAndCount(page, size)
 146   const result = await handler(start, count)
 147
 148   let next: string | undefined
 149   let prev: string | undefined
 150
 151   // Assert page is a number
 152   page = parseInt(page, 10)
 153
 154   // There are more results
 155   if (result.total > page * size) {
 156     next = baseUrl + '?page=' + (page + 1)
 157   }
 158
 159   if (page > 1) {
 160     prev = baseUrl + '?page=' + (page - 1)
 161   }
 162
 163   return {
 164     id: baseUrl + '?page=' + page,
 165     type: 'OrderedCollectionPage',
 166     prev,
 167     next,
 168     partOf: baseUrl,
 169     orderedItems: result.data,
 170     totalItems: result.total
 171   }
 172
 173 }
 174
 175 function buildSignedActivity (byActor: MActor, data: Object, contextType?: ContextType) {
 176   const activity = activityPubContextify(data, contextType)
 177
 178   return signJsonLDObject(byActor, activity) as Promise<Activity>
 179 }
 180
 181 function getAPId (activity: string | { id: string }) {
 182   if (typeof activity === 'string') return activity
 183
 184   return activity.id
 185 }
 186
 187 function checkUrlsSameHost (url1: string, url2: string) {
 188   const idHost = new URL(url1).host
 189   const actorHost = new URL(url2).host
 190
 191   return idHost && actorHost && idHost.toLowerCase() === actorHost.toLowerCase()
 192 }
 193
 194 function buildRemoteVideoBaseUrl (video: MVideoAccountLight, path: string) {
 195   const host = video.VideoChannel.Account.Actor.Server.host
 196
 197   return REMOTE_SCHEME.HTTP + '://' + host + path
 198 }
 199
 200 // ---------------------------------------------------------------------------
 201
 202 export {
 203   checkUrlsSameHost,
 204   getAPId,
 205   activityPubContextify,
 206   activityPubCollectionPagination,
 207   buildSignedActivity,
 208   buildRemoteVideoBaseUrl
 209 }