Javascript URLSearchParams <-> JS Object converter (multidimensional)

url-params-converter.js

class BrainsUrlParamsConverter {
    /**
     * Convert any object to URLSearchParams
     * @param {Object} object
     * @returns {Object}
     */
    static objectToUrlSearchParams (object) {
      if (typeof object !== 'object' || !object) {
        return
      }

      function append (object, keyParts) {
        for (let key in object) {
          let useKeyParts = keyParts
          if (!useKeyParts) {
            useKeyParts = key
          } else {
            useKeyParts += '[' + key + ']'
          }
          const value = object[key]
          if (typeof value === 'object' && value) {
            append(value, useKeyParts)
          } else if (value !== null) {
            params.append(useKeyParts, value)
          }
        }
      }

      const params = new URLSearchParams()
      append(object)
      return params
    }

    /**
     * Convert URLSearchParams to multidimensional object
     * @param {URLSearchParams} searchParams
     * @returns {Object}
     */
    static urlSearchParamsToObject (searchParams) {
      function append (object, keyParts, value) {
        const firstKey = keyParts.shift()
        if (keyParts.length === 0) {
          object[firstKey] = value
        } else {
          if (typeof object[firstKey] === 'undefined') {
            object[firstKey] = {}
          }
          append(object[firstKey], keyParts, value)
        }
      }

      const data = {}
      for (const searchParam of searchParams.entries()) {
        const keyParts = searchParam[0].replace(/\]\[/g, '\/\/').replace(/]$/, '').replace(/\[/g, '\/\/').split('//')
        append(data, keyParts, searchParam[1])
      }
      return data
    }  
  }