find out routes express sues

routes.js

'use strict';

const paths = new Set();
const pathsData = {};
const _ = require('lodash');

function getPath(layer) {
  if (layer.route && layer.route.path) {
    return layer.route.path;
  } else if (layer.path) {
    return layer.path;
  } else if (layer.regexp) {
    return `${layer.regexp}`
  }

  return null;
}

function printStack(stack, prefixes, depth) {
  stack.forEach((layer, idx) => {
    prefixes.index.push(idx);
    prefixes.name.push(layer.name);

    const index = prefixes.index.join(':');
    const name = prefixes.name.join(':');

    let path = getPath(layer);
    prefixes.path.push(path);

    console.log(`${index}:${name}: ${path} ${layer.regexp}`);
    console.log(layer);

    if (path) {
      const fullpath = prefixes.path.join(',');
      if (paths.has(fullpath)) {
        pathsData[fullpath].names.push(name);
      } else {
        pathsData[fullpath] = {
          names: [name],
        };
        paths.add(fullpath);
      }
    }

    const tmp = _.cloneDeep(prefixes);

    if (layer.handle && layer.handle.stack) {
      printStack(layer.handle.stack, tmp, depth + 1);
    }

    if (layer.route && layer.route.stack) {
      printStack(layer.route.stack, tmp, depth + 1);
    }

    prefixes.path.pop();
    prefixes.name.pop();
    prefixes.index.pop();
    console.log(``);
  });
}

function main() {
  var injector = require('./injector')();
  injector.bootstrap(function (app) {
//    console.log(app._router.stack);
    const prefixes = {
      name: [],
      index: [],
      path: [],
    };

    printStack(app._router.stack, prefixes, 0);

    console.log(`Paths: `);
    const value = 1;

    paths.forEach((path) => {
      switch (value) {
        case 1:
          console.log(`${path}`);
          break;

        case 2:
          console.log(`${path}`);
          pathsData[path].names.forEach((name) => {
            console.log(`  ${name}`);
          })
          break;
      }
    });
    process.exit(0);
  });
}

if (require.main === module) {
  main();
}