fireAjaxCounter.js

// @flow
// /* eslint array-callback-return: "error" */
/* eslint block-scoped-var: "error" */
/* eslint no-implied-eval: "error" */
/* eslint comma-style: ["error", "first"] */
/* eslint max-len: ["error", 130] */
/* eslint max-params: ["error", 3] */
/* eslint-env es6 */
/* eslint newline-per-chained-call: ["error", { "ignoreChainWithDepth": 1 }] */
/* eslint operator-linebreak: [2, "before"] */

const lookupCounter = counter => {
  let foundCounter = {'unique': ''}
  const counters = window.optimost.config.optimostData.counters
  try {
    if (counters) {
      const cnt = '' + counter
      ; [foundCounter] = counters.filter(({counterId}) => counterId === cnt)
    }
  } catch (lookupCounterErr) {
    window.optimost.saitama.log('! lookupCounter Error: ', lookupCounterErr)
  }
  return foundCounter
}

const cleanParams = query => query && encodeURIComponent(('' + query)
  .replace(/^[?&]+/, '')
  .replace(/[?&]+$/, '')
)

const buildAttrQueryString = (attrs = {}) => {
  let attrQueryString = ''
  try {
    const keyValStringify = key => `&${cleanParams(key)}=${cleanParams(attrs[key])}`
    const appendQueryString = (qs, attr) => qs + attr
    attrQueryString = Object.keys(attrs)
      .map(keyValStringify)
      .reduce(appendQueryString, '')
  } catch (buildAttrQueryStringErr) {
    window.optimost.saitama.log('! buildAttrQueryString Error: ', buildAttrQueryStringErr)
  }
  return attrQueryString
}

const findstickyCookieName = subjectId => {
  let foundstickyCookieName = ''
  const experimentBySubjectId = exp => exp.subjectId === subjectId
  const getStickyCookieName = (exps, exp) => exp.stickyCookieName

  try {
    const exps = window.optimost.config.optimostData.experiments
    foundstickyCookieName = exps
      .filter(experimentBySubjectId)
      .reduce(getStickyCookieName, '')
  } catch (findstickyCookieNameErr) {
    window.optimost.saitama.log('! findstickyCookieName Error: ', findstickyCookieNameErr)
  }
  return foundstickyCookieName
}

const gumToLiid = cookie => cookie.replace(/gum$/, 'liid')

const getCookieQS = cookieName => {
  let cookieString = ''
  try {
    if (cookieName) {
      const cookieReg = new RegExp(`.*${cookieName}=([^ ;=]+).*`)
      const cookieVal = document.cookie.replace(cookieReg, (_, val) => val)
      cookieString = `${cleanParams(cookieName)}=${cleanParams(cookieVal)}`
    }
  } catch (getCookieQSErr) {
    window.optimost.saitama.log('! getCookieQS Error: ', getCookieQSErr)
  }
  return cookieString
}

const buildLiidCookies = (cntData = {'subjectIds': []}) => {
  let cookiesQS = ''
  const appendQueryString = (qs, cookie) => cookie
    ? `${qs}&${cookie}`
    : qs
  try {
    const subjectIds = cntData.subjectIds
    cookiesQS = subjectIds
      .map(findstickyCookieName)
      .map(gumToLiid)
      .map(getCookieQS)
      .reduce(appendQueryString, '')
  } catch (getCookieQSErr) {
    window.optimost.saitama.log('! getCookieQS Error: ', getCookieQSErr)
  }
  return cookiesQS
}

const fireCounterLikeYouMeanIt = (cnt, attrs = false) => {
  const cacheBuster = (() => {
    let now = new Date()
    let timeStamp = Math.round(now.getTime() / 1000)
    return `?D_ts=${timeStamp}&D_tzo=${now.getTimezoneOffset()}`
  })()

  try {
    const attrsQS = attrs
      ? buildAttrQueryString(attrs)
      : ''
    const cntData = lookupCounter(cnt)
    const liidCookies = buildLiidCookies(cntData)
    const tld = window.optimost.getBaseUrl(true)
    const pathnm = cntData.unique
    const src = tld + pathnm + cacheBuster + attrsQS + liidCookies
    const sanitizedSRC = window.optimost._private.ApiUtils.sanitizeUrl(src)
    window.optimost.saitama.log(' fireAjaxCounter url is: ', sanitizedSRC)
    if (navigator.sendBeacon) {
      navigator.sendBeacon(sanitizedSRC)
      window.optimost.saitama.log(`fireAjaxCounter sendBeacon ${sanitizedSRC} fired`)
    } else {
      window.jQuery.get(
        sanitizedSRC
        , res => window.optimost.saitama.log(`fireAjaxCounter ${sanitizedSRC} pixel fired successfully`))
    }
  } catch (fireAjaxCounterErr) {
    window.optimost.saitama.log('! fireAjaxCounter error: ', fireAjaxCounterErr)
  }
}