str2obj.mjs

  1. import cv from './_jsonType.mjs'
  2. import isstr from './isstr.mjs'
  3. import isarr from './isarr.mjs'
  6. /**
  7.  * 字串轉任意資料，可支援內含Uint8Array與Uint16Array數據
  8.  *
  9.  * Unit Test: {@link https://github.com/yuda-lyu/wsemi/blob/master/test/str2obj.test.mjs Github}
  10.  * @memberOf wsemi
  11.  * @param {*} data 輸入任意資料
  12.  * @param {String|Array} [ext='Uint8Array'] 輸入擴充數據種類字串或陣列，預設'Uint8Array'
  13.  * @returns {String} 回傳base64字串
  14.  * @example
  15.  *
  16.  * console.log(str2obj('{"a":"abc","b":12.3,"u8a":"[Uint8Array]::QmFz","u16a":{"0":11,"1":79,"2":6}}'))
  17.  * // => {
  18.  * // =>   a: 'abc',
  19.  * // =>   b: 12.3,
  20.  * // =>   u8a: Uint8Array [ 66, 97, 115 ],
  21.  * // =>   u16a: { '0': 11, '1': 79, '2': 6 }
  22.  * // => }
  23.  *
  24.  * console.log(str2obj('{"a":"abc","b":12.3,"u8a":"[Uint8Array]::QmFz","u16a":"[Uint8Array]::C08G"}', ['Uint8Array', 'Uint16Array']}))
  25.  * // => {
  26.  * // =>   a: 'abc',
  27.  * // =>   b: 12.3,
  28.  * // =>   u8a: Uint8Array [ 66, 97, 115 ],
  29.  * // =>   u16a: Uint8Array [ 11, 79, 6 ]
  30.  * // => }
  31.  *
  32.  */
  33. function str2obj(data, ext = 'Uint8Array') {
  35.     //ext
  36.     if (isstr(ext)) {
  37.         ext = [ext]
  38.     }
  39.     else if (isarr(ext)) {
  40.         //none
  41.     }
  42.     else {
  43.         //ext error
  44.         return {}
  45.     }
  47.     //replacer
  48.     function replacer(k, v) {
  49.         if (ext.indexOf('Uint8Array') >= 0) {
  50.             v = cv.b642u8arr(v)
  51.         }
  52.         if (ext.indexOf('Uint16Array') >= 0) {
  53.             v = cv.b642u16arr(v)
  54.         }
  55.         return v
  56.     }
  58.     let s = {}
  59.     try {
  60.         s = JSON.parse(data, replacer)
  61.     }
  62.     catch (err) {
  63.         s = {}
  64.     }
  66.     return s
  67. }
  70. export default str2obj