index.mjs

import Koa from 'koa'
import _ from 'koa-route'

const app = new Koa()

const db = {
    tobi: { name: 'tobi11', species: 'ferret' },
    loki: { name: 'loki', species: 'ferret' },
    jane: { name: 'jane', species: 'ferret' }
};

const pets = {
    list: (ctx) => {
        const names = Object.keys(db);
        ctx.body = 'pets: ' + names.join(', ');
    },

    show: (ctx, name) => {
        const pet = db[name];
        if (!pet) return ctx.throw('cannot find that pet', 404);
        ctx.body = pet.name + ' is a ' + pet.species;
    }
};

app.use(_.get('/pets', pets.list));
app.use(_.get('/pets/:name', pets.show));

app.listen(3000);
console.log('listening on port 3000');