@trailstash/ultra/lib/queryProviders/dsv.js

A web based tool for making MapLibre GL maps with data from sources such as Overpass, GeoJSON, GPX, KML, TCX, etc

import { fetchIfHTTP } from "./util.js";
import csv2geojsonPkg from "csv2geojson";
const { csv2geojson } = csv2geojsonPkg;
import { geoJsonLayers as layers } from "./common.js";

const detect = async (query) => {
  if (query.startsWith("https://") && query.endsWith(".tsv")) {
    return true;
  }
  if (query.startsWith("https://") && query.endsWith(".csv")) {
    return true;
  }
  if (query.startsWith("https://docs.google.com/spreadsheets/")) {
    return true;
  }
};

export default {
  source: async function (query) {
    if (query.startsWith("https://docs.google.com/spreadsheets/")) {
      const u = new URL(query);
      if (
        u.pathname.endsWith("/edit") &&
        u.pathname.startsWith("/spreadsheets/")
      ) {
        const sp = new URLSearchParams(u.search);
        sp.set("tqx", "out:csv");
        query =
          u.origin +
          u.pathname.replace(/edit$/, "gviz/tq") +
          "?" +
          sp.toString();
      }
    }
    query = await fetchIfHTTP(query);
    const data = await new Promise((resolve, reject) =>
      csv2geojson(query, { delimiter: "auto" }, (error, result) =>
        error ? reject(error.message) : resolve(result),
      ),
    );
    return { type: "geojson", data, generateId: true };
  },
  detect,
  layers,
  fitBounds: true,
};