runtime/bridge/normalize.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import { typof, bufferToBase64, base64ToBuffer } from '../shared/utils'

/**
 * Normalize a primitive value.
 * @param  {any}        v
 * @return {primitive}
 */
export function normalizePrimitive (v) {
  const type = typof(v)

  switch (type) {
    case 'Undefined':
    case 'Null':
      return ''

    case 'RegExp':
      return v.toString()
    case 'Date':
      return v.toISOString()

    case 'Number':
    case 'String':
    case 'Boolean':
    case 'Array':
    case 'Object':
      return v

    case 'ArrayBuffer':
      return {
        '@type': 'binary',
        dataType: type,
        base64: bufferToBase64(v)
      }

    case 'Int8Array':
    case 'Uint8Array':
    case 'Uint8ClampedArray':
    case 'Int16Array':
    case 'Uint16Array':
    case 'Int32Array':
    case 'Uint32Array':
    case 'Float32Array':
    case 'Float64Array':
      return {
        '@type': 'binary',
        dataType: type,
        base64: bufferToBase64(v.buffer)
      }

    default:
      return JSON.stringify(v)
  }
}

export function decodePrimitive (data) {
  if (typof(data) === 'Object') {
    // decode base64 into binary
    if (data['@type'] && data['@type'] === 'binary') {
      return base64ToBuffer(data.base64 || '')
    }

    const realData = {}
    for (const key in data) {
      realData[key] = decodePrimitive(data[key])
    }
    return realData
  }
  if (typof(data) === 'Array') {
    return data.map(decodePrimitive)
  }
  return data
}