index.js

"use strict";

const dotenv = require('dotenv');

const contentful = require('contentful');

const fs = require('fs');

const path = require('path');

dotenv.config();
const BASE_URL = 'https://narative.co';
const root = path.dirname('./');
const redirectPath = path.join(root, '_redirects');
const contents = fs.readFileSync(redirectPath, 'utf8');
let newContents = contents; // Create a clinet to talk with Contentful

const client = contentful.createClient({
  space: process.env.CONTENTFUL_SPACE_ID,
  accessToken: process.env.CONTENTFUL_PREVIEW_API_KEY,
  host: 'preview.contentful.com',
  environment: process.env.CONTENTFUL_ENVIRONMENT || 'master',
  dynamic_antries: 'auto'
});

async function createRedirects(event, context) {
  const entries = await client.getEntries({
    include: 10,
    limit: 1000
  });
  const articles = entries.items.filter(entry => entry.sys.contentType.sys.id === 'article');
  const redirects = articles.reduce((curr, next) => {
    const {
      shortUrl,
      slug
    } = next.fields;
    const longUrl = `${BASE_URL}/articles/${slug}`;
    return `/${shortUrl} ${longUrl}\n` + curr;
  }, `/* ${BASE_URL}\n`);
  console.log(redirects);
  fs.writeFileSync(redirectPath, redirects);
}

createRedirects();