common-utils.js

/**
 * 将对象属性值转为map结构
 * @param {*} obj
 */
export function objToMap (obj) {
  let map = new Map()
  for (let key of Object.keys(obj)) {
    map.set(key, obj[key])
  }
  return map
}

/**
 * 将对象数组拆分为 key-val数组
 * @param {*} obj
 */
export function objToKeyVal (obj) {
  let arr = []
  for (let key of Object.keys(obj)) {
    let obj_ = {}
    obj_['key'] = key
    obj_['val'] = obj[key]
    arr.push(obj_)
  }
  return arr
}

/**
 * 分页
 */
export function pagination (page, pageSize, all) {
  let begin = ((page - 1) * pageSize)
  let end = begin + pageSize
  return all.slice(begin, end)
}

/**
 * 更改排序
 */
export function sortChange (obj, all) {
  let _p = obj.prop
  let isReverse = (obj.order === 'descending')
  all.sort((a, b) => {
    let _a = a[_p]
    let _b = b[_p]
    if (!isNaN(_a)) {
      _a = Number(_a)
      _b = Number(_b)
    }
    if (_a < _b) return isReverse ? 1 : -1
    if (_a > _b) return isReverse ? -1 : 1
    return 0
  })
}


export function download (url, options) {
  let form = $('<form>')
  form.attr('style', 'display:none')
  form.attr('target', '')
  form.attr('method', 'post')
  form.attr('action', url)
  let tokenInput = $('<input>')
  let typeInput = $('<input>')
  tokenInput.attr('type', 'hidden')
  tokenInput.attr('name', 'token')
  tokenInput.attr('value', localStorage.getItem('default_auth_token'))
  typeInput.attr('type', 'hidden')
  typeInput.attr('name', 'options')
  typeInput.attr('value', JSON.stringify(options))
  $('body').append(form)
  form.append(tokenInput)
  form.append(typeInput)
  form.submit()
}

/**
 *
 * @param {yyyy-mm-dd} from
 * @param {yyyy-mm-dd} to
 */
export function calcDays (from, to) {
  return Math.abs((Date.parse(from) - Date.parse(to)) / 1000 / 60 / 60 / 24) + 1
}

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string}
 */
export function parseTime(time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value ] }
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = url.split('?')[1]
  if (!search) {
    return {}
  }
  return JSON.parse(
    '{"' +
      decodeURIComponent(search)
        .replace(/"/g, '\\"')
        .replace(/&/g, '","')
        .replace(/=/g, '":"')
        .replace(/\+/g, ' ') +
      '"}'
  )
}


/**
 * 用星号掩盖
 * @param {*} val
 * @param {number} len
 */
export function asteriskMask(val, len) {
  return String(val).replace(RegExp(`.{${len}}`), '*'.repeat(len))
}

//img byte to base64
`data:image/png;base64,${btoa(String.fromCharCode(...new Uint8Array(response)))}`