atriusmaps-node-sdk/dist/cjs/src/historyManager.js

This project provides an API to Atrius Personal Wayfinder maps within a Node environment. See the README.md for more information

'use strict';

const initHistoryManager = ({ bus }) => {
  const stepStack = [];
  bus.on(
    "history/register",
    ({ viewId, event, params = {} }) => {
      stepStack.push({ viewId, event, params });
    }
  );
  bus.on("history/stepBack", () => {
    const layersToHide = [];
    const current = stepStack.pop();
    if (!current) {
      return;
    }
    layersToHide.push(current.viewId);
    for (let i = stepStack.length - 1; i >= 0; --i) {
      if (stepStack[i].event === current.event) {
        const same = stepStack.pop();
        layersToHide.push(same.viewId);
      } else {
        break;
      }
    }
    bus.send("layers/hideMultiple", layersToHide);
    const { event, params } = stepStack.pop();
    bus.send(event, params);
  });
  bus.on("history/clean", () => {
    stepStack.length = 0;
  });
};

exports.initHistoryManager = initHistoryManager;