client/src/app/shared/misc/peertube-local-storage.ts

   1 // Thanks: https://github.com/capaj/localstorage-polyfill
   2
   3 const valuesMap = new Map()
   4
   5 class MemoryStorage {
   6   [key: string]: any
   7   [index: number]: string
   8
   9   getItem (key) {
  10     const stringKey = String(key)
  11     if (valuesMap.has(key)) {
  12       return String(valuesMap.get(stringKey))
  13     }
  14
  15     return null
  16   }
  17
  18   setItem (key, val) {
  19     valuesMap.set(String(key), String(val))
  20   }
  21
  22   removeItem (key) {
  23     valuesMap.delete(key)
  24   }
  25
  26   clear () {
  27     valuesMap.clear()
  28   }
  29
  30   key (i: any) {
  31     if (arguments.length === 0) {
  32       throw new TypeError('Failed to execute "key" on "Storage": 1 argument required, but only 0 present.')
  33     }
  34
  35     const arr = Array.from(valuesMap.keys())
  36     return arr[i]
  37   }
  38
  39   get length () {
  40     return valuesMap.size
  41   }
  42 }
  43
  44 let peertubeLocalStorage: Storage
  45 try {
  46   peertubeLocalStorage = localStorage
  47 } catch (err) {
  48   const instance = new MemoryStorage()
  49
  50   peertubeLocalStorage = new Proxy(instance, {
  51     set: function (obj, prop, value) {
  52       if (MemoryStorage.prototype.hasOwnProperty(prop)) {
  53         instance[prop] = value
  54       } else {
  55         instance.setItem(prop, value)
  56       }
  57       return true
  58     },
  59     get: function (target, name) {
  60       if (MemoryStorage.prototype.hasOwnProperty(name)) {
  61         return instance[name]
  62       }
  63       if (valuesMap.has(name)) {
  64         return instance.getItem(name)
  65       }
  66     }
  67   })
  68 }
  69
  70 export { peertubeLocalStorage }