app.js

'use strict';
const { exec } = require('child_process');
const { generateFunctionalities } = require('./features/firebase-crud')
const express = require('express')
const app = express()
const port = 8080;
var AdmZip = require('adm-zip');
const archiver = require('archiver')
const db = require('./config');
const fs = require('fs');
// end routes
app.listen(port, () => {
  console.log(`Example app listening at http://localhost:${port}`)
})

var cors = require('cors');
app.use(cors())


app.get('/generate/:apiId', async (req, res) => {
  let apiId = req.params.apiId;

  try {
    let api = (await db.doc('api/' + req.params.apiId).get()).data().swaggerDoc
    api = JSON.stringify(JSON.parse(api), null, 4);
    await fs.writeFileSync('apiId.json', api);

  } catch (error) {
    console.log('error writing file', error)
    res.json({ success: false, message: 'There was a problem fetching the API document. ' })
  }
  console.log('got api file')

  try {
    //   console.log('step', errorStep)
    await exec(`java -jar openapi-generator-cli.jar generate \
    -i apiId.json \
    -g nodejs-express-server \
    -o tmp/gen`, async (error, stdout, stderr) => {
      // console.log(`stdout: ${stdout}`);
      // console.error(`stderr: ${stderr}`);

      //     errorStep = '1'
      //     console.log('step', errorStep) 

      let e = error;
      let so = stdout;
      let si = stderr;

      // START CODE GEN



      const myPackages = `
    
    {
      "name": "${apiId}",
      "version": "1.0.0",
      "description": "No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)",
      "main": "index.js",
      "scripts": {
        "prestart": "npm install",
        "start": "node index.js"
      },
      "keywords": [
        "openapi-generator",
        "openapi"
      ],
      "license": "Unlicense",
      "private": true,
      "dependencies": {
        "body-parser": "^1.19.0",
        "camelcase": "^5.3.1",
        "cookie-parser": "^1.4.4",
        "cors": "^2.8.5",
        "express": "^4.16.4",
        "express-openapi-validator": "^3.9.1",
        "firebase-admin": "^9.4.1",
        "js-yaml": "^3.3.0",
        "ono": "^5.0.1",
        "openapi-sampler": "^1.0.0-beta.15",
        "swagger-ui-express": "^4.0.2",
        "winston": "^3.2.1"
      },
      "devDependencies": {
        "axios": "^0.19.0",
        "chai": "^4.2.0",
        "chai-as-promised": "^7.1.1",
        "eslint": "^5.16.0",
        "eslint-config-airbnb-base": "^14.0.0",
        "eslint-plugin-import": "^2.17.2",
        "mocha": "^7.1.1"
      },
      "eslintConfig": {
        "env": {
          "node": true
        }
      }
    }
    
    
    `

      // where the magic happens
      await generateFunctionalities(apiId)


      fs.writeFileSync('tmp/gen/package.json', myPackages, 'utf-8');

      // END CODE GEN





      // creating archives
      var zip = new AdmZip();
      zip.addLocalFolder('tmp/gen');
      // or write everything to disk

      zip.writeZip("tmp/output.zip", (e) => {
        if (e) {
          console.error('ADMZIP error', e)

        }
      });

      // let zipFileContents = zip.toBuffer();
      // const fileName = 'generate.zip';
      // const fileType = 'application/zip';
      // // res.writeHead(200, {
      // //   'Content-Disposition': `attachment; filename="${fileName}"`,
      // //   'Content-Type': fileType,
      // // })
      // res.set({
      //   'Content-Type': 'application/zip',
      //   'Content-Disposition': `attachment; filename="${fileName}"`
      // })
      // return res.sendFile(__dirname + '/tmp/output.zip');

      var stat = fs.statSync(__dirname + '/tmp/output.zip');

      res.writeHead(200, {
        'Content-Type': 'application/zip',
        'Content-Length': stat.size
      });

      var readStream = fs.createReadStream(__dirname + '/tmp/output.zip');
      // We replaced all the event handlers with a simple call to readStream.pipe()
      readStream.pipe(res);


    })



  } catch (error) {
    console.error(error)
    res.send({ success: false, message: 'there was an error: ' + + ' ' + error })

  }





});

app.get('/', (req, res) => {

  res.send('API Generator Running....')



});


module.exports = {
  app
};


// /Users/marcusgallegos/api-builder-71719-7bf68aea3f5b.json