Transform iShare language strings in JSON format to XML format

transform.js

const lang = {
  lang: {
    oli: {
      baseMapsTitle: "Base maps",
      deviceLocation: {
        showLocation: "Show your location",
      },
      fullScreen: {
        tipLabel: "Toggle full-screen",
      },
      gazetteer: {
        noResults: "No results found",
        placeholder: "Search...",
        queryTooShort: "Type ${minQueryLength} or more characters for results",
        selectedOption:
          "${selectedOption} ${index} of ${length} is highlighted",
        resultsDescription: "Result count: ${length}. ${selectedOption}",
        assistiveHint:
          "When autocomplete results are available, use the up and down arrows to review and enter to select. Users of touch devices can explore by touch or with swipe gestures.",
      },
      layerSwitcher: {
        hideButtonTitle: "Collapse legend",
        showButtonTitle: "Show legend",
      },
      historyNavigation: {
        backHtml: "⇐",
        backTitle: "Navigate back",
        forwardHtml: "⇒",
        forwardTitle: "Navigate forward",
      },
      zoom: {
        zoomInTipLabel: "Zoom in",
        zoomOutTipLabel: "Zoom out",
      },
      apps: {
        spotlight: {
          baseMapsTitle: "Base layer",
          gazetteer: {
            placeholder: "Partial address or postcode...",
          },
        },
      },
    },
  },
};

function toPathValues(obj) {
  let pathVals = [];
  let _keys = [];
  function walk(o) {
    for (let k in o) {
      let v = o[k];
      // console.log(k, v);
      _keys.push(k);
      if (v instanceof Object) {
        // console.log('walking...', _keys, v);
        walk(v);
        _keys.pop();
      } else {
        // console.log('leaf', _keys, v);
        pathVals.push({ path: _keys.join("."), value: v });
        _keys.pop();
      }
    }
  }
  walk(obj);
  return pathVals;
}

const pathVals = toPathValues(lang);
// console.log(pathVals);

console.log("<root>");
for (let o of pathVals) {
  // console.log(o);
  console.log(`  <key id="${o.path}">${o.value}</key>`);
}
console.log("</root>");

// <root>
//   <key id="lang.oli.baseMapsTitle">Base maps</key>
//   <key id="lang.oli.deviceLocation.showLocation">Show your location</key>
//   <key id="lang.oli.fullScreen.tipLabel">Toggle full-screen</key>
//   <key id="lang.oli.gazetteer.noResults">No results found</key>
//   <key id="lang.oli.gazetteer.placeholder">Search...</key>
//   <key id="lang.oli.gazetteer.queryTooShort">Type ${minQueryLength} or more characters for results</key>
//   <key id="lang.oli.gazetteer.selectedOption">${selectedOption} ${index} of ${length} is highlighted</key>
//   <key id="lang.oli.gazetteer.resultsDescription">Result count: ${length}. ${selectedOption}</key>
//   <key id="lang.oli.gazetteer.assistiveHint">When autocomplete results are available, use the up and down arrows to review and enter to select. Users of touch devices can explore by touch or with swipe gestures.</key>
//   <key id="lang.oli.layerSwitcher.hideButtonTitle">Collapse legend</key>
//   <key id="lang.oli.layerSwitcher.showButtonTitle">Show legend</key>
//   <key id="lang.oli.historyNavigation.backHtml">&lArr;</key>
//   <key id="lang.oli.historyNavigation.backTitle">Navigate back</key>
//   <key id="lang.oli.historyNavigation.forwardHtml">&rArr;</key>
//   <key id="lang.oli.historyNavigation.forwardTitle">Navigate forward</key>
//   <key id="lang.oli.zoom.zoomInTipLabel">Zoom in</key>
//   <key id="lang.oli.zoom.zoomOutTipLabel">Zoom out</key>
//   <key id="lang.oli.apps.spotlight.baseMapsTitle">Base layer</key>
//   <key id="lang.oli.apps.spotlight.gazetteer.placeholder">Partial address or postcode...</key>
// </root>