import * as fs from "fs";
import * as JSZip from "jszip";

interface Location {
  timestampMs: string;
  latitudeE7: number;
  longitudeE7: number;
  accuracy: number;
}

export async function toKml(takeout: ArrayBuffer | Blob) {
  const zip = await JSZip.loadAsync(takeout);
  const content = await zip
    .folder("Takeout")
    .folder("Location History")
    .file("Location History.json")
    .async("text");
  const { locations } = JSON.parse(content) as {
    locations: Location[];
  };
  return locations;
}

const f = fs.readFileSync("takeout.zip");
toKml(f.buffer.slice(f.byteOffset, f.byteOffset + f.byteLength));