starcloud-sdk-uniapp/format.js

import { md5 } from 'js-md5'
import crc from 'crc'

// 周数组转换
export function convertWeekdaysToNumber(weekDay) {
  let weekStr = '00000000'

  // eslint-disable-next-line no-restricted-syntax
  for (const day of weekDay) {
    const index = day % 7
    weekStr = weekStr.substring(0, index) + '1' + weekStr.substring(index + 1)
  }

  // 倒序 weekStr
  weekStr = weekStr.split('').reverse().join('')

  return parseInt(weekStr, 2)
}

// 时间戳转二进制
export function timestampToArray(timestamp) {
  const array = new Uint8Array(4)
  array[0] = (timestamp & 0xff000000) >> 24
  array[1] = (timestamp & 0xff0000) >> 16
  array[2] = (timestamp & 0xff00) >> 8
  array[3] = timestamp & 0xff
  return array
}
// 时分字符串转二进制
export function parseTimeToList(timeString) {
  let timeList = [0, 0, 0, 0]

  if (timeString.includes(':')) {
    let timeParts = timeString.split(':')
    timeList[2] = parseInt(timeParts[0], 10)
    timeList[3] = parseInt(timeParts[1], 10)
  }

  return new Uint8Array(timeList)
}

// md5加密
export function md5Encrypt(text, token, key) {
  const length = text.length + 4 + 16
  const md5Array = new Uint8Array(length)

  for (let i = 0; i < text.length; i++) {
    md5Array[i] = text.charCodeAt(i)
  }

  md5Array.set(token, text.length)
  md5Array.set(key, text.length + 4)

  const md5Text = md5(md5Array)
  return new Uint8Array(md5Text.match(/.{1,2}/g).map(byte => parseInt(byte, 16)))
}

// 生成包尾 头部数据+内容数据
export function createPackageEnd(headArray, contentArray) {
  // 拼接头部和内容
  let mergerArray = new Uint8Array(headArray.length + contentArray.length)
  mergerArray.set(headArray)
  mergerArray.set(contentArray, headArray.length)

  // crc加密
  const crcResult = crc.crc16kermit(mergerArray)

  // 拼接crc
  let newArray = new Uint8Array(mergerArray.length + 2)
  newArray.set(mergerArray)
  newArray.set([crcResult / 256, crcResult % 256], mergerArray.length)

  return newArray
}

// 二进制转时间戳
export function arrayToTimestamp(array) {
  const timestamp = (array[0] << 24) | (array[1] << 16) | (array[2] << 8) | array[3]
  return timestamp >>> 0
}

// 二进制转字符串
export function uint8ArrayToString(uint8Array) {
  let str = ''
  for (let i = 0; i < uint8Array.length; i++) {
    if (uint8Array[i] !== 0) {
      str += String.fromCharCode(uint8Array[i])
    }
  }
  return str
}

// 去除特征值尾部0
export function removeTrailingZeros(data) {
  const featureCount = data[0]
  let currentIndex = 1
  for (let i = 0; i < featureCount; i++) {
    const length = data[currentIndex + 1]
    currentIndex += 2 + length
  }
  return data.slice(0, currentIndex)
}


/**
 * 将分钟时间转换为两个字节的数组
 * @param minutes
 * @returns {(number|number)[]}
 */
export function convertTimeToBytes(minutes) {
  return [
    Math.floor(minutes / 256),  // 高字节
    minutes % 256               // 低字节
  ];
}

/**
 * 二进制字符串转换为十进制数字数组
 * 例如 '0111110' 会被转换为 [1, 2, 3, 4, 5]（表示周一到周五）
 * @param weekdayBit
 * @returns {*[]}
 */
export function convertWeekdayBitToArray(weekdayBit) {
  const weekdays = [];
  const bits = weekdayBit.split('');
  bits.forEach((bit, index) => {
    if (bit === '1') {
      weekdays.push(index);
    }
  });
  return weekdays;
}

/**
 * 十进制数字数组转为二进制字符串
 * 例如 将 [1,2,3,4,5] 转换回 '0111110'
 * @param weekdays
 * @returns {string}
 */
export function convertWeekdayArrayToBit(weekdays) {
  const bits = new Array(7).fill('0');
  weekdays.forEach(day => {
    if (day >= 0 && day < 7) {
      bits[day] = '1';
    }
  });
  return bits.join('');
}

/**
 * 用于判断时间戳是否是秒级别的，如果是的话则补充到毫秒级别
 * @param timestamp 时间戳
 * @returns {number|*}
 * @private
 */
export function _convertToMilliseconds(timestamp) {
  if (!timestamp) return timestamp;
  return timestamp.toString().length === 10 ? timestamp * 1000 : timestamp;
}

/**
 * 检查并返回具体哪个参数为空
 * @param {Object} params - 参数对象
 * @param {Array<string>} requiredFields - 必填字段列表
 * @returns {string | null} - 如果有字段为空，则返回错误消息；否则返回null
 */
export function checkRequiredFields(params, requiredFields) {
  for (let field of requiredFields) {
    if (params[field] === undefined || params[field] === null) {
      return `${field} 不能为空`;
    }
  }
  return null;
}