server/middlewares/validators/follows.ts

   1 import * as express from 'express'
   2 import { body, param } from 'express-validator/check'
   3 import { isTestInstance } from '../../helpers/core-utils'
   4 import { isEachUniqueHostValid, isHostValid } from '../../helpers/custom-validators/servers'
   5 import { logger } from '../../helpers/logger'
   6 import { getServerActor } from '../../helpers/utils'
   7 import { SERVER_ACTOR_NAME, WEBSERVER } from '../../initializers'
   8 import { ActorFollowModel } from '../../models/activitypub/actor-follow'
   9 import { areValidationErrors } from './utils'
  10 import { ActorModel } from '../../models/activitypub/actor'
  11 import { loadActorUrlOrGetFromWebfinger } from '../../helpers/webfinger'
  12 import { isValidActorHandle } from '../../helpers/custom-validators/activitypub/actor'
  13
  14 const followValidator = [
  15   body('hosts').custom(isEachUniqueHostValid).withMessage('Should have an array of unique hosts'),
  16
  17   (req: express.Request, res: express.Response, next: express.NextFunction) => {
  18     // Force https if the administrator wants to make friends
  19     if (isTestInstance() === false && WEBSERVER.SCHEME === 'http') {
  20       return res.status(500)
  21         .json({
  22           error: 'Cannot follow on a non HTTPS web server.'
  23         })
  24         .end()
  25     }
  26
  27     logger.debug('Checking follow parameters', { parameters: req.body })
  28
  29     if (areValidationErrors(req, res)) return
  30
  31     return next()
  32   }
  33 ]
  34
  35 const removeFollowingValidator = [
  36   param('host').custom(isHostValid).withMessage('Should have a valid host'),
  37
  38   async (req: express.Request, res: express.Response, next: express.NextFunction) => {
  39     logger.debug('Checking unfollowing parameters', { parameters: req.params })
  40
  41     if (areValidationErrors(req, res)) return
  42
  43     const serverActor = await getServerActor()
  44     const follow = await ActorFollowModel.loadByActorAndTargetNameAndHostForAPI(serverActor.id, SERVER_ACTOR_NAME, req.params.host)
  45
  46     if (!follow) {
  47       return res
  48         .status(404)
  49         .json({
  50           error: `Following ${req.params.host} not found.`
  51         })
  52         .end()
  53     }
  54
  55     res.locals.follow = follow
  56     return next()
  57   }
  58 ]
  59
  60 const getFollowerValidator = [
  61   param('nameWithHost').custom(isValidActorHandle).withMessage('Should have a valid nameWithHost'),
  62
  63   async (req: express.Request, res: express.Response, next: express.NextFunction) => {
  64     logger.debug('Checking get follower parameters', { parameters: req.params })
  65
  66     if (areValidationErrors(req, res)) return
  67
  68     let follow: ActorFollowModel
  69     try {
  70       const actorUrl = await loadActorUrlOrGetFromWebfinger(req.params.nameWithHost)
  71       const actor = await ActorModel.loadByUrl(actorUrl)
  72
  73       const serverActor = await getServerActor()
  74       follow = await ActorFollowModel.loadByActorAndTarget(actor.id, serverActor.id)
  75     } catch (err) {
  76       logger.warn('Cannot get actor from handle.', { handle: req.params.nameWithHost, err })
  77     }
  78
  79     if (!follow) {
  80       return res
  81         .status(404)
  82         .json({
  83           error: `Follower ${req.params.nameWithHost} not found.`
  84         })
  85         .end()
  86     }
  87
  88     res.locals.follow = follow
  89     return next()
  90   }
  91 ]
  92
  93 const acceptOrRejectFollowerValidator = [
  94   (req: express.Request, res: express.Response, next: express.NextFunction) => {
  95     logger.debug('Checking accept/reject follower parameters', { parameters: req.params })
  96
  97     const follow = res.locals.follow
  98     if (follow.state !== 'pending') {
  99       return res.status(400).json({ error: 'Follow is not in pending state.' }).end()
 100     }
 101
 102     return next()
 103   }
 104 ]
 105
 106 // ---------------------------------------------------------------------------
 107
 108 export {
 109   followValidator,
 110   removeFollowingValidator,
 111   getFollowerValidator,
 112   acceptOrRejectFollowerValidator
 113 }