md.html/path-validate.js at main · wmartinmimi/md.html · GitHub

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"use strict";

function getQueryPath() {
  // Gets URL parameters
  let queryString = window.location.search;
  let urlParams = new URLSearchParams(queryString);

  // return ?path, empty otherwise
  return urlParams.get("path") ?? "";
}

// Make sure it points to a markdown file
function isPathMd(path) {
  return path.endsWith(".md") || path.endsWith(".markdown");
}

async function isPathValid() {
  let path = getQueryPath();
  if (path === "") {
    let response = await fetch("/index.md");
    if (response.ok) {
      window.location.replace(window.location.pathname + "?path=/index.md");
      return false;
    } else {
      window.location.replace(window.location.pathname + "?path=/README.md");
      return false;
    }
  }
  if (!isPathMd(path)) {
    // open without saving current url to history
    window.location.replace(path);
    return false;
  }
  return true;
}

// global variable
let run_main;
isPathValid().then(val => {
  run_main = val;
  if (typeof entry !== "undefined" && run_main) {
    entry();
  }
});