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