backendless-console-sdk/src/utils/total-rows.js

Backendless Console SDK for Node.js and browser

import _omit from 'lodash/omit'

const NON_COUNTS_PARAMS = ['offset', 'pagesize', 'pageSize', 'sortBy', 'sortDirection']
const DEFAULT_CACHE_TTL = 30000

const trimQueryParams = (path, paramsToTrim) => {
  const pathTokens = path.split('?')
  const url = pathTokens[0]
  const params = pathTokens[1] || ''
  const paramsTokens = params.split('&')

  const filteredParams = paramsToTrim && paramsToTrim.length
    ? paramsTokens.filter(param => paramsToTrim.indexOf(param.split('=')[0]) === -1)
    : []

  const filteredQuery = filteredParams.join('&')

  return filteredQuery ? `${url}?${filteredQuery}` : url
}

const getCountPath = path => {
  path = trimQueryParams(path, NON_COUNTS_PARAMS)

  const pathTokens = path.split('?')

  if (pathTokens[0] && pathTokens[0].endsWith('/')) {
    pathTokens[0] = pathTokens[0].slice(0, -1)
  }

  return `${pathTokens[0]}/count${pathTokens[1] ? '?' + pathTokens[1] : ''}`
}

const getDataReqURL = dataReq => {
  let url = dataReq.path

  if (url && url.endsWith('/')) {
    url = url.slice(0, -1)
  }

  return url
}

export default req => ({

  get(path, cacheTags) {
    return req.get(getCountPath(path)).useCache().cacheTags(cacheTags)
  },

  getFor(dataReq, cacheTTL = DEFAULT_CACHE_TTL) {
    const url = getDataReqURL(dataReq)

    return req
      .get(url + '/count')
      .useCache(cacheTTL)
      .cacheTags(...(dataReq.tags || []))
      .query(_omit(dataReq.queryParams, NON_COUNTS_PARAMS))
  },

  getViaPostFor(dataReq, cacheTTL = DEFAULT_CACHE_TTL) {
    const url = getDataReqURL(dataReq)

    return req
      .post(url + '/count', _omit(dataReq.body, NON_COUNTS_PARAMS))
      .useCache(cacheTTL)
      .cacheTags(...(dataReq.tags || []))
  },

  getWithData(dataReq, cacheTTL) {
    return dataReq.then(data => {
      return this.getFor(dataReq, cacheTTL).then(totalRows => ({ data, totalRows }))
    })
  }
})