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, processUndoActivity } from '../../lib'
   6 import { processAcceptActivity } from '../../lib/activitypub/process/process-accept'
   7 import { processAddActivity } from '../../lib/activitypub/process/process-add'
   8 import { processAnnounceActivity } from '../../lib/activitypub/process/process-announce'
   9 import { processDeleteActivity } from '../../lib/activitypub/process/process-delete'
  10 import { processFollowActivity } from '../../lib/activitypub/process/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   Undo: processUndoActivity
  24 }
  25
  26 const inboxRouter = express.Router()
  27
  28 inboxRouter.post('/inbox',
  29   signatureValidator,
  30   asyncMiddleware(checkSignature),
  31   activityPubValidator,
  32   asyncMiddleware(inboxController)
  33 )
  34
  35 inboxRouter.post('/account/:name/inbox',
  36   signatureValidator,
  37   asyncMiddleware(checkSignature),
  38   localAccountValidator,
  39   activityPubValidator,
  40   asyncMiddleware(inboxController)
  41 )
  42
  43 // ---------------------------------------------------------------------------
  44
  45 export {
  46   inboxRouter
  47 }
  48
  49 // ---------------------------------------------------------------------------
  50
  51 async function inboxController (req: express.Request, res: express.Response, next: express.NextFunction) {
  52   const rootActivity: RootActivity = req.body
  53   let activities: Activity[] = []
  54
  55   if ([ 'Collection', 'CollectionPage' ].indexOf(rootActivity.type) !== -1) {
  56     activities = (rootActivity as ActivityPubCollection).items
  57   } else if ([ 'OrderedCollection', 'OrderedCollectionPage' ].indexOf(rootActivity.type) !== -1) {
  58     activities = (rootActivity as ActivityPubOrderedCollection).orderedItems
  59   } else {
  60     activities = [ rootActivity as Activity ]
  61   }
  62
  63   // Only keep activities we are able to process
  64   logger.debug('Filtering activities...', { activities })
  65   activities = activities.filter(a => isActivityValid(a))
  66   logger.debug('We keep %d activities.', activities.length, { activities })
  67
  68   await processActivities(activities, res.locals.account)
  69
  70   res.status(204).end()
  71 }
  72
  73 async function processActivities (activities: Activity[], inboxAccount?: AccountInstance) {
  74   for (const activity of activities) {
  75     const activityProcessor = processActivity[activity.type]
  76     if (activityProcessor === undefined) {
  77       logger.warn('Unknown activity type %s.', activity.type, { activityId: activity.id })
  78       continue
  79     }
  80
  81     await activityProcessor(activity, inboxAccount)
  82   }
  83 }