server/helpers/custom-validators/activitypub/activity.ts

   1 import * as validator from 'validator'
   2 import { Activity, ActivityType } from '../../../../shared/models/activitypub/activity'
   3 import { isAccountAcceptActivityValid, isAccountDeleteActivityValid, isAccountFollowActivityValid } from './account'
   4 import { isAnnounceValid } from './announce'
   5 import { isActivityPubUrlValid } from './misc'
   6 import { isUndoValid } from './undo'
   7 import { isVideoChannelCreateActivityValid, isVideoChannelDeleteActivityValid, isVideoChannelUpdateActivityValid } from './video-channels'
   8 import {
   9   isVideoFlagValid,
  10   isVideoTorrentAddActivityValid,
  11   isVideoTorrentDeleteActivityValid,
  12   isVideoTorrentUpdateActivityValid
  13 } from './videos'
  14
  15 function isRootActivityValid (activity: any) {
  16   return Array.isArray(activity['@context']) &&
  17     (
  18       (activity.type === 'Collection' || activity.type === 'OrderedCollection') &&
  19       validator.isInt(activity.totalItems, { min: 0 }) &&
  20       Array.isArray(activity.items)
  21     ) ||
  22     (
  23       isActivityPubUrlValid(activity.id) &&
  24       isActivityPubUrlValid(activity.actor)
  25     )
  26 }
  27
  28 const activityCheckers: { [ P in ActivityType ]: (activity: Activity) => boolean } = {
  29   Create: checkCreateActivity,
  30   Add: checkAddActivity,
  31   Update: checkUpdateActivity,
  32   Delete: checkDeleteActivity,
  33   Follow: checkFollowActivity,
  34   Accept: checkAcceptActivity,
  35   Announce: checkAnnounceActivity,
  36   Undo: checkUndoActivity
  37 }
  38
  39 function isActivityValid (activity: any) {
  40   const checker = activityCheckers[activity.type]
  41   // Unknown activity type
  42   if (!checker) return false
  43
  44   return checker(activity)
  45 }
  46
  47 // ---------------------------------------------------------------------------
  48
  49 export {
  50   isRootActivityValid,
  51   isActivityValid
  52 }
  53
  54 // ---------------------------------------------------------------------------
  55
  56 function checkCreateActivity (activity: any) {
  57   return isVideoChannelCreateActivityValid(activity) ||
  58     isVideoFlagValid(activity)
  59 }
  60
  61 function checkAddActivity (activity: any) {
  62   return isVideoTorrentAddActivityValid(activity)
  63 }
  64
  65 function checkUpdateActivity (activity: any) {
  66   return isVideoTorrentUpdateActivityValid(activity) ||
  67     isVideoChannelUpdateActivityValid(activity)
  68 }
  69
  70 function checkDeleteActivity (activity: any) {
  71   return isVideoTorrentDeleteActivityValid(activity) ||
  72     isVideoChannelDeleteActivityValid(activity) ||
  73     isAccountDeleteActivityValid(activity)
  74 }
  75
  76 function checkFollowActivity (activity: any) {
  77   return isAccountFollowActivityValid(activity)
  78 }
  79
  80 function checkAcceptActivity (activity: any) {
  81   return isAccountAcceptActivityValid(activity)
  82 }
  83
  84 function checkAnnounceActivity (activity: any) {
  85   return isAnnounceValid(activity)
  86 }
  87
  88 function checkUndoActivity (activity: any) {
  89   return isUndoValid(activity)
  90 }