@lonelyplanet/dotcom-core/dist/containers/dataLayer/index.js

This package is meant to house some of our more common UI and shared libs across dotcom applications.

"use strict";

var __assign = this && this.__assign || Object.assign || function (t) {
  for (var s, i = 1, n = arguments.length; i < n; i++) {
    s = arguments[i];

    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
  }

  return t;
};

Object.defineProperty(exports, "__esModule", {
  value: true
});

var withSideEffect = require("react-side-effect");

var legacyDataLayerInitPayloadIndex = 0;

exports.reducePropsToState = function (propsList) {
  return propsList.reduce(function (memo, m) {
    return __assign({}, memo, m.data);
  }, {});
};

exports.handleStateChangeOnClient = function (state) {
  if (typeof window !== "undefined" && window.lp && window.lp.analytics && window.lp.analytics.dataLayer) {
    window.lp.analytics.dataLayer[legacyDataLayerInitPayloadIndex] = state;
  }
};

exports.createDataLayerScript = function (state) {
  return "\n  window.lp = window.lp || {};\n  window.lp.analytics = window.lp.analytics || {};\n  window.lp.analytics.dataLayer = window.lp.analytics.dataLayer || [];\n  window.lp.analytics.dataLayer[" + legacyDataLayerInitPayloadIndex + "] = " + JSON.stringify(state) + ";\n  " + (process.env.NODE_ENV !== "production" ? "window.lp.analytics.send = function(options) {\n    console.group(\"GTM\"); console.info(options); console.groupEnd(\"GTM\");\n  }" : "") + "\n  window.dataLayer = window.lp.analytics.dataLayer;\n";
};

var mapStateOnServer = function (state) {
  return exports.createDataLayerScript(state);
};

exports.default = withSideEffect(exports.reducePropsToState, exports.handleStateChangeOnClient, mapStateOnServer)(function () {
  return null;
});