index.ts

// Register the route to return all the animals
router.get('/animals', async (req: IttyRequest, env: Env) => {
   let animals = await getAllAnimals(env)

   return new Response(JSON.stringify(animals))
})

// Register the route to return an animal by ID
router.get('/animals/:id', async (req: IttyRequest, env: Env) => {
   let animals = await getAllAnimals(env)

   let animal = animals.find(a => a['id'] == Number(req.params?.id))

   return new Response(JSON.stringify(animal))
})

// Register the route to create an animal
router.post('/animals', async (req: IttyRequest, env: Env) => {
   let content = await req.json?.()

   if (content == undefined) {
      return new Response('Please provide a body.')
   }

   //Do not use this in production, use a UUID, using Date.now() for convenience
   content['id'] = Date.now()

   let animal = await addAnimal(content, env)

   return new Response(JSON.stringify(animal))
})