leads-api.js

const express = require('express');
const bodyParser = require('body-parser');
const cors = require('cors');

const leads_data = require('./mock-data.json');

const app = express();
app.use(bodyParser.json())
   .use(bodyParser.urlencoded())
   .use(cors())
   .options('*', cors());

console.log(__dirname);

let leads = leads_data;
let PORT = process.env.PORT || 3000;

function introduceChaos(res) {
  if (Math.floor(Math.random() * 20) === 10) {
    res.status(500).json({
      error: 'Unable to process your request: an error has occurred'
    }); // random 500 error

    return true;
  }
}

app.get('/api/leads', (req, res, next) => {
  if (introduceChaos(res)) { return; }

  const leads_without_potential_duplicates = leads
    .map(({ potential_duplicates, ...lead }) => lead);

  return res.status(200).json(leads_without_potential_duplicates);
});

app.put('/api/leads/:lead_id', (req, res, next) => {
  const lead = req.body;

  const [ matching_lead ] = leads.filter(l => l.lead_id === lead.lead_id);
  if (matching_lead) {
    const index = leads.indexOf(matching_lead);
    leads[index] = {
      ...lead,
      potential_duplicates: matching_lead.potential_duplicates
    };

    if (introduceChaos(res)) { return; }
    return res.status(200).json(lead);
  } else {
    if (introduceChaos(res)) { return; }
    return res.status(404).json({ error: `lead_id ${req.params.lead_id} not found`})
  }


});

app.get('/api/leads/:lead_id/potential-duplicates', (req, res, next) => {
  const [ lead ] = leads
    .filter(lead => lead.lead_id === req.params.lead_id);

  if (introduceChaos(res)) { return; }

  if (lead) {
    return res.status(200).json(lead.potential_duplicates);
  } else {
    return res.status(404).json({ error: `lead_id ${req.params.lead_id} not found`});
  }
})

app.listen(PORT, () => {
  console.log(`Autovance Leads API is listening on port ${PORT}`);
});