server/helpers/utils.ts

   1 import { Model } from 'sequelize-typescript'
   2 import * as ipaddr from 'ipaddr.js'
   3 const isCidr = require('is-cidr')
   4 import { ResultList } from '../../shared'
   5 import { VideoResolution } from '../../shared/models/videos'
   6 import { CONFIG } from '../initializers'
   7 import { UserModel } from '../models/account/user'
   8 import { ActorModel } from '../models/activitypub/actor'
   9 import { ApplicationModel } from '../models/application/application'
  10 import { pseudoRandomBytesPromise } from './core-utils'
  11 import { logger } from './logger'
  12
  13 async function generateRandomString (size: number) {
  14   const raw = await pseudoRandomBytesPromise(size)
  15
  16   return raw.toString('hex')
  17 }
  18
  19 interface FormattableToJSON {
  20   toFormattedJSON ()
  21 }
  22
  23 function getFormattedObjects<U, T extends FormattableToJSON> (objects: T[], objectsTotal: number) {
  24   const formattedObjects: U[] = []
  25
  26   objects.forEach(object => {
  27     formattedObjects.push(object.toFormattedJSON())
  28   })
  29
  30   const res: ResultList<U> = {
  31     total: objectsTotal,
  32     data: formattedObjects
  33   }
  34
  35   return res
  36 }
  37
  38 async function isSignupAllowed () {
  39   if (CONFIG.SIGNUP.ENABLED === false) {
  40     return false
  41   }
  42
  43   // No limit and signup is enabled
  44   if (CONFIG.SIGNUP.LIMIT === -1) {
  45     return true
  46   }
  47
  48   const totalUsers = await UserModel.countTotal()
  49
  50   return totalUsers < CONFIG.SIGNUP.LIMIT
  51 }
  52
  53 function isSignupAllowedForCurrentIP (ip: string) {
  54   const addr = ipaddr.parse(ip)
  55   let excludeList = [ 'blacklist' ]
  56   let matched: string
  57
  58   // if there is a valid, non-empty whitelist, we exclude all unknown adresses too
  59   if (CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr(cidr)).length > 0) {
  60     excludeList.push('unknown')
  61   }
  62
  63   if (addr.kind() === 'ipv4') {
  64     const addrV4 = ipaddr.IPv4.parse(ip)
  65     const rangeList = {
  66       whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v4(cidr))
  67                                                 .map(cidr => ipaddr.IPv4.parseCIDR(cidr)),
  68       blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v4(cidr))
  69                                                 .map(cidr => ipaddr.IPv4.parseCIDR(cidr))
  70     }
  71     matched = ipaddr.subnetMatch(addrV4, rangeList, 'unknown')
  72   } else if (addr.kind() === 'ipv6') {
  73     const addrV6 = ipaddr.IPv6.parse(ip)
  74     const rangeList = {
  75       whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v6(cidr))
  76                                                 .map(cidr => ipaddr.IPv6.parseCIDR(cidr)),
  77       blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v6(cidr))
  78                                                 .map(cidr => ipaddr.IPv6.parseCIDR(cidr))
  79     }
  80     matched = ipaddr.subnetMatch(addrV6, rangeList, 'unknown')
  81   }
  82
  83   return !excludeList.includes(matched)
  84 }
  85
  86 function computeResolutionsToTranscode (videoFileHeight: number) {
  87   const resolutionsEnabled: number[] = []
  88   const configResolutions = CONFIG.TRANSCODING.RESOLUTIONS
  89
  90   const resolutions = [
  91     VideoResolution.H_240P,
  92     VideoResolution.H_360P,
  93     VideoResolution.H_480P,
  94     VideoResolution.H_720P,
  95     VideoResolution.H_1080P
  96   ]
  97
  98   for (const resolution of resolutions) {
  99     if (configResolutions[resolution + 'p'] === true && videoFileHeight > resolution) {
 100       resolutionsEnabled.push(resolution)
 101     }
 102   }
 103
 104   return resolutionsEnabled
 105 }
 106
 107 function resetSequelizeInstance (instance: Model<any>, savedFields: object) {
 108   Object.keys(savedFields).forEach(key => {
 109     const value = savedFields[key]
 110     instance.set(key, value)
 111   })
 112 }
 113
 114 let serverActor: ActorModel
 115 async function getServerActor () {
 116   if (serverActor === undefined) {
 117     const application = await ApplicationModel.load()
 118     serverActor = application.Account.Actor
 119   }
 120
 121   if (!serverActor) {
 122     logger.error('Cannot load server actor.')
 123     process.exit(0)
 124   }
 125
 126   return Promise.resolve(serverActor)
 127 }
 128
 129 type SortType = { sortModel: any, sortValue: string }
 130
 131 // ---------------------------------------------------------------------------
 132
 133 export {
 134   generateRandomString,
 135   getFormattedObjects,
 136   isSignupAllowed,
 137   isSignupAllowedForCurrentIP,
 138   computeResolutionsToTranscode,
 139   resetSequelizeInstance,
 140   getServerActor,
 141   SortType
 142 }