server/controllers/activitypub/inbox.ts

   1 import * as express from 'express'
   2 import { Activity, ActivityPubCollection, ActivityPubOrderedCollection, ActivityType, RootActivity } from '../../../shared'
   3 import { logger } from '../../helpers'
   4 import { isActivityValid } from '../../helpers/custom-validators/activitypub/activity'
   5 import { processCreateActivity, processUpdateActivity } from '../../lib'
   6 import { processAcceptActivity } from '../../lib/activitypub/process-accept'
   7 import { processAddActivity } from '../../lib/activitypub/process-add'
   8 import { processAnnounceActivity } from '../../lib/activitypub/process-announce'
   9 import { processDeleteActivity } from '../../lib/activitypub/process-delete'
  10 import { processFollowActivity } from '../../lib/activitypub/process-follow'
  11 import { asyncMiddleware, checkSignature, localAccountValidator, signatureValidator } from '../../middlewares'
  12 import { activityPubValidator } from '../../middlewares/validators/activitypub/activity'
  13 import { AccountInstance } from '../../models/account/account-interface'
  14
  15 const processActivity: { [ P in ActivityType ]: (activity: Activity, inboxAccount?: AccountInstance) => Promise<any> } = {
  16   Create: processCreateActivity,
  17   Add: processAddActivity,
  18   Update: processUpdateActivity,
  19   Delete: processDeleteActivity,
  20   Follow: processFollowActivity,
  21   Accept: processAcceptActivity,
  22   Announce: processAnnounceActivity
  23 }
  24
  25 const inboxRouter = express.Router()
  26
  27 inboxRouter.post('/inbox',
  28   signatureValidator,
  29   asyncMiddleware(checkSignature),
  30   activityPubValidator,
  31   asyncMiddleware(inboxController)
  32 )
  33
  34 inboxRouter.post('/account/:name/inbox',
  35   signatureValidator,
  36   asyncMiddleware(checkSignature),
  37   localAccountValidator,
  38   activityPubValidator,
  39   asyncMiddleware(inboxController)
  40 )
  41
  42 // ---------------------------------------------------------------------------
  43
  44 export {
  45   inboxRouter
  46 }
  47
  48 // ---------------------------------------------------------------------------
  49
  50 async function inboxController (req: express.Request, res: express.Response, next: express.NextFunction) {
  51   const rootActivity: RootActivity = req.body
  52   let activities: Activity[] = []
  53
  54   if ([ 'Collection', 'CollectionPage' ].indexOf(rootActivity.type) !== -1) {
  55     activities = (rootActivity as ActivityPubCollection).items
  56   } else if ([ 'OrderedCollection', 'OrderedCollectionPage' ].indexOf(rootActivity.type) !== -1) {
  57     activities = (rootActivity as ActivityPubOrderedCollection).orderedItems
  58   } else {
  59     activities = [ rootActivity as Activity ]
  60   }
  61
  62   // Only keep activities we are able to process
  63   logger.debug('Filtering activities...', { activities })
  64   activities = activities.filter(a => isActivityValid(a))
  65   logger.debug('We keep %d activities.', activities.length, { activities })
  66
  67   await processActivities(activities, res.locals.account)
  68
  69   res.status(204).end()
  70 }
  71
  72 async function processActivities (activities: Activity[], inboxAccount?: AccountInstance) {
  73   for (const activity of activities) {
  74     const activityProcessor = processActivity[activity.type]
  75     if (activityProcessor === undefined) {
  76       logger.warn('Unknown activity type %s.', activity.type, { activityId: activity.id })
  77       continue
  78     }
  79
  80     await activityProcessor(activity, inboxAccount)
  81   }
  82 }