All files patchAnalytics.js

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import {
  decorateContextWithNeededData,
  getDefaultProperties
} from './segmentWrapper.js'
 
const MPI_PATCH_FIELD = '__mpi_patch'
 
function monkeyPatchAnalyticsTrack() {
  const {track: originalTrack} = window.analytics
  window.analytics.track = (...args) => {
    const [event, properties, contextFromArgs, fn] = args
    const newProperties = {
      ...getDefaultProperties(),
      ...properties
    }
    decorateContextWithNeededData(contextFromArgs).then(context => {
      originalTrack.call(window.analytics, event, newProperties, context, fn)
    })
    return window.analytics
  }
  // add a flag to the patched analytics so we don't patch this twice
  window.analytics[MPI_PATCH_FIELD] = true
}
 
Eif (typeof window !== 'undefined') {
  Eif (!window.analytics) {
    console.warn('Segment Analytics is not loaded so patch is not applied.')
  } else if (!window.analytics[MPI_PATCH_FIELD]) {
    window.analytics.initialized
      ? monkeyPatchAnalyticsTrack()
      : window.analytics.ready(monkeyPatchAnalyticsTrack)
  }
}