rekit-portal/middleware/index.js

'use strict';

const path = require('path');
const fs = require('fs');
const url = require('url');
const _ = require('lodash');
const express = require('express');
const bodyParser = require('body-parser');
const Watchpack = require('watchpack');
const prettier = require('prettier');
const rekitCore = require('rekit-core');
const fetchProjectData = require('./api/fetchProjectData');
const getFileContent = require('./api/getFileContent');
const saveFile = require('./api/saveFile');
const runBuild = require('./api/runBuild');
const runTest = require('./api/runTest');

const utils = rekitCore.utils;

// rekitCore.utils.setProjectRoot('/Users/i305656/workspace/rekit');
rekitCore.plugin.loadPlugins(rekitCore);

let lastProjectData = null;
module.exports = function() { // eslint-disable-line
  let io = null;

  const bgProcesses = {};

  const wp = new Watchpack({
    // options:
    aggregateTimeout: 1000,
    // fire "aggregated" event when after a change for 1000ms no additonal change occured
    // aggregated defaults to undefined, which doesn't fire an "aggregated" event

    poll: false,
    // poll: true - use polling with the default interval
    // poll: 10000 - use polling with an interval of 10s
    // poll defaults to undefined, which prefer native watching methods
    // Note: enable polling when watching on a network path

    ignored: /node_modules/,
    // anymatch-compatible definition of files/paths to be ignored
    // see https://github.com/paulmillr/chokidar#path-filtering
  });

  // Watchpack.prototype.watch(string[] files, string[] directories, [number startTime])
  // Watch src files change only
  wp.watch([], [path.join(rekitCore.utils.getProjectRoot(), 'src'), path.join(rekitCore.utils.getProjectRoot(), 'coverage')], Date.now() - 10);
  // starts watching these files and directories
  // calling this again will override the files and directories

  wp.on('aggregated', (changes) => {
    // changes: an array of all changed files
    rekitCore.vio.reset();
    // const newProjectData = fetchProjectData();
    // if (_.isEqual(newProjectData, lastProjectData)) return;
    // lastProjectData = newProjectData;
    if (io) io.emit('fileChanged', changes);
  });

  const rootPath = '/rekit';

  function execCmd(req, res) {
    try {
      const args = req.body;
      rekitCore.handleCommand(args);
      const logs = rekitCore.vio.flush();
      rekitCore.vio.reset();
      res.write(JSON.stringify({
        args,
        logs,
      }));
      res.end();
    } catch (e) {
      res.statusCode = 500;
      res.write(e.toString());
      res.end();
    }
  }

  function setupSocketIo(server) {
    io = require('socket.io')(server);

    io.on('connection', (client) => {
      client.on('disconnect', () => {
        console.log('socket disconnected');
      });
    });
  }

  function reply403(res) {
    res.statusCode = 403;
    res.write('Forbidden: Rekit portal is running on readonly mode.');
    res.end();
  }

  function rekitMiddleware(server, app, args) {
    args = args || {};
    setupSocketIo(server);
    const prjRoot = rekitCore.utils.getProjectRoot();
    app.use('/coverage', express.static(utils.joinPath(prjRoot, 'coverage'), { fallthrough: false }));
    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({ extended: true }));

    return (req, res, next) => {
      const urlObject = url.parse(req.originalUrl);
      const p = urlObject.pathname.replace(rootPath, '');

      try {
        switch (p) {
          case '/api/project-data': {
            lastProjectData = fetchProjectData();
            res.write(JSON.stringify(Object.assign({
              bgProcesses,
            }, lastProjectData)));
            res.end();
            break;
          }
          case '/api/format-code': {
            const content = req.body.content;
            const ext = req.body.ext;
            const options = {
              singleQuote: true,
              trailingComma: 'es5',
              printWidth: 120,
            };
            if (ext === 'less' || ext === 'scss') options.parser = ext;
            try {
              res.write(JSON.stringify({ content: prettier.format(content, options) }));
            } catch (err) {
              res.write(JSON.stringify({ content, error: err }));
            }
            res.end();
            break;
          }
          case '/api/save-file': {
            if (args.readonly) { reply403(res); break; }
            const absPath = utils.joinPath(prjRoot, req.body.file);
            if (!_.startsWith(absPath, prjRoot)) {
              // prevent ../.. in req.query.file
              res.statusCode = 403;
              res.write('Forbidden: not allowed to access file out of the project.');
              res.end();
              break;
            }

            if (!fs.existsSync(absPath)) {
              res.statusCode = 404;
              res.write(JSON.stringify({ error: 'Not found.' }));
              res.end();
            } else {
              try {
                saveFile(absPath, req.body.content);
                res.write(JSON.stringify({ success: true }));
              } catch (err) {
                res.write(JSON.stringify({ error: err }));
              }
              res.end();
            }
            break;
          }
          case '/api/file-content': {
            const absPath = utils.joinPath(prjRoot, req.query.file);
            if (!_.startsWith(absPath, prjRoot)) {
              // prevent ../.. in req.query.file
              res.statusCode = 403;
              res.write('Forbidden: not allowed to access file out of the project.');
              res.end();
              break;
            }

            if (!fs.existsSync(absPath)) {
              res.statusCode = 404;
              res.write(JSON.stringify({ error: 'Not found.' }));
              res.end();
            } else {
              res.write(JSON.stringify({ content: getFileContent(absPath) }));
              res.end();
            }
            break;
          }
          case '/api/exec-cmd':
            if (args.readonly) { reply403(res); break; }
            execCmd(req, res);
            break;
          case '/api/run-build':
            if (args.readonly) { reply403(res); break; }
            if (bgProcesses.runningBuild) {
              res.statusCode = 500;
              res.write(JSON.stringify({ error: 'Build process is running...' }));
              res.end();
            } else {
              bgProcesses.runningBuild = true;
              runBuild(io).then(() => {
                bgProcesses.runningBuild = false;
              }).catch(() => {
                bgProcesses.runningBuild = false;
              });
              res.write('{}');
              res.end();
            }
            break;
          case '/api/run-test':
            if (args.readonly) { reply403(res); break; }
            if (bgProcesses.runningTest) {
              res.statusCode = 500;
              res.write(JSON.stringify({ error: 'Test process is running...' }));
              res.end();
            } else {
              bgProcesses.runningTest = true;
              runTest(io, req.body.testFile || '').then(() => {
                bgProcesses.runningTest = false;
              }).catch(() => {
                bgProcesses.runningTest = false;
              });
              res.write('{}');
              res.end();
            }
            break;
          default: {
            if (/^\/api\//.test(p)) {
              res.statusCode = 404;
              res.write(JSON.stringify({ error: `API not found: ${p}` }));
              res.end();
            } else {
              next();
            }
            break;
          }
        }
      } catch (e) {
        res.statusCode = 500;
        res.write(e.toString());
        res.end();
      }
    };
  }
  return rekitMiddleware;
};