overleaf/services/web/frontend/js/directives/eventTracking.js

import _ from 'lodash'
/* eslint-disable
    camelcase,
    max-len,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
// For sending event data to metabase and google analytics
// ---
// by default,
//   event not sent to MB.
//     for MB, add event-tracking-mb='true'
//     by default, event sent to MB via sendMB
//   event not sent to GA.
//     for GA, add event-tracking-ga attribute, where the value is the GA category
// Either GA or MB can use the attribute event-tracking-send-once='true' to
// send event just once
//   MB will use the key and GA will use the action to determine if the event
//   has been sent
// event-tracking-trigger attribute is required to send event

/* eslint-disable
    camelcase,
    max-len,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
// For sending event data to metabase and google analytics
// ---
// by default,
//   event not sent to MB.
//     for MB, add event-tracking-mb='true'
//     by default, event sent to MB via sendMB
//   event not sent to GA.
//     for GA, add event-tracking-ga attribute, where the value is the GA category
// Either GA or MB can use the attribute event-tracking-send-once='true' to
// send event just once
//   MB will use the key and GA will use the action to determine if the event
//   has been sent
// event-tracking-trigger attribute is required to send event

import App from '../base'

const isInViewport = function(element) {
  const elTop = element.offset().top
  const elBtm = elTop + element.outerHeight()

  const viewportTop = $(window).scrollTop()
  const viewportBtm = viewportTop + $(window).height()

  return elBtm > viewportTop && elTop < viewportBtm
}

export default App.directive('eventTracking', eventTracking => ({
  scope: {
    eventTracking: '@',
    eventSegmentation: '=?'
  },
  link(scope, element, attrs) {
    const sendGA = attrs.eventTrackingGa || false
    const sendMB = attrs.eventTrackingMb || false
    const sendMBFunction = attrs.eventTrackingSendOnce ? 'sendMBOnce' : 'sendMB'
    const sendGAFunction = attrs.eventTrackingSendOnce ? 'sendGAOnce' : 'send'
    const segmentation = scope.eventSegmentation || {}
    segmentation.page = window.location.pathname

    const sendEvent = function(scrollEvent) {
      /*
                      @param {boolean}		scrollEvent		Use to unbind scroll event
                  */
      if (sendMB) {
        eventTracking[sendMBFunction](scope.eventTracking, segmentation)
      }
      if (sendGA) {
        eventTracking[sendGAFunction](
          attrs.eventTrackingGa,
          attrs.eventTrackingAction || scope.eventTracking,
          attrs.eventTrackingLabel || ''
        )
      }
      if (scrollEvent) {
        return $(window).unbind('resize scroll')
      }
    }

    if (attrs.eventTrackingTrigger === 'load') {
      return sendEvent()
    } else if (attrs.eventTrackingTrigger === 'click') {
      return element.on('click', e => sendEvent())
    } else if (attrs.eventTrackingTrigger === 'hover') {
      let timer = null
      let timeoutAmt = 500
      if (attrs.eventHoverAmt) {
        timeoutAmt = parseInt(attrs.eventHoverAmt, 10)
      }
      return element
        .on('mouseenter', function() {
          timer = setTimeout(() => sendEvent(), timeoutAmt)
        })
        .on('mouseleave', () => clearTimeout(timer))
    } else if (
      attrs.eventTrackingTrigger === 'scroll' &&
      !eventTracking.eventInCache(scope.eventTracking)
    ) {
      $(window).on(
        'resize scroll',
        _.throttle(() => {
          if (isInViewport(element)) {
            sendEvent(true)
          }
        }, 500)
      )
    }
  }
}))