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 import { isViewActivityValid } from './view'
  15
  16 function isRootActivityValid (activity: any) {
  17   return Array.isArray(activity['@context']) &&
  18     (
  19       (activity.type === 'Collection' || activity.type === 'OrderedCollection') &&
  20       validator.isInt(activity.totalItems, { min: 0 }) &&
  21       Array.isArray(activity.items)
  22     ) ||
  23     (
  24       isActivityPubUrlValid(activity.id) &&
  25       isActivityPubUrlValid(activity.actor)
  26     )
  27 }
  28
  29 const activityCheckers: { [ P in ActivityType ]: (activity: Activity) => boolean } = {
  30   Create: checkCreateActivity,
  31   Add: checkAddActivity,
  32   Update: checkUpdateActivity,
  33   Delete: checkDeleteActivity,
  34   Follow: checkFollowActivity,
  35   Accept: checkAcceptActivity,
  36   Announce: checkAnnounceActivity,
  37   Undo: checkUndoActivity
  38 }
  39
  40 function isActivityValid (activity: any) {
  41   const checker = activityCheckers[activity.type]
  42   // Unknown activity type
  43   if (!checker) return false
  44
  45   return checker(activity)
  46 }
  47
  48 // ---------------------------------------------------------------------------
  49
  50 export {
  51   isRootActivityValid,
  52   isActivityValid
  53 }
  54
  55 // ---------------------------------------------------------------------------
  56
  57 function checkCreateActivity (activity: any) {
  58   return isVideoChannelCreateActivityValid(activity) ||
  59     isVideoFlagValid(activity) ||
  60     isViewActivityValid(activity)
  61 }
  62
  63 function checkAddActivity (activity: any) {
  64   return isVideoTorrentAddActivityValid(activity)
  65 }
  66
  67 function checkUpdateActivity (activity: any) {
  68   return isVideoTorrentUpdateActivityValid(activity) ||
  69     isVideoChannelUpdateActivityValid(activity)
  70 }
  71
  72 function checkDeleteActivity (activity: any) {
  73   return isVideoTorrentDeleteActivityValid(activity) ||
  74     isVideoChannelDeleteActivityValid(activity) ||
  75     isAccountDeleteActivityValid(activity)
  76 }
  77
  78 function checkFollowActivity (activity: any) {
  79   return isAccountFollowActivityValid(activity)
  80 }
  81
  82 function checkAcceptActivity (activity: any) {
  83   return isAccountAcceptActivityValid(activity)
  84 }
  85
  86 function checkAnnounceActivity (activity: any) {
  87   return isAnnounceValid(activity)
  88 }
  89
  90 function checkUndoActivity (activity: any) {
  91   return isUndoValid(activity)
  92 }