Express Routers

animals.js

const express = require("express");
const {
  getElementById,
  getIndexById,
  updateElement,
  seedElements,
  createElement,
} = require("./utils");

const animalsRouter = express.Router();

let animals = [];
seedElements(animals, "animals");

// Get all animals
animalsRouter.get("/", (req, res, next) => {
  res.send(animals);
});

// Get a single animal
animalsRouter.get("/:id", (req, res, next) => {
  const animal = getElementById(req.params.id, animals);
  if (animal) {
    res.send(animal);
  } else {
    res.status(404).send();
  }
});

// Create an animal
animalsRouter.post("/", (req, res, next) => {
  const receivedAnimal = createElement("animals", req.query);
  if (receivedAnimal) {
    animals.push(receivedAnimal);
    res.status(201).send(receivedAnimal);
  } else {
    res.status(400).send();
  }
});

// Update an animal
animalsRouter.put("/:id", (req, res, next) => {
  const animalIndex = getIndexById(req.params.id, animals);
  if (animalIndex !== -1) {
    updateElement(req.params.id, req.query, animals);
    res.send(animals[animalIndex]);
  } else {
    res.status(404).send();
  }
});

// Delete a single animal
animalsRouter.delete("/:id", (req, res, next) => {
  const animalIndex = getIndexById(req.params.id, animals);
  if (animalIndex !== -1) {
    animals.splice(animalIndex, 1);
    res.status(204).send();
  } else {
    res.status(404).send();
  }
});

module.exports = animalsRouter;

app.js

const express = require("express");
const app = express();

const PORT = process.env.PORT || 4001;
// Use static server to serve the Express Yourself Website
app.use(express.static("public"));

// Import and mount the expressionsRouter
const expressionsRouter = require("./expressions.js");
app.use("/expressions", expressionsRouter);

const animalsRouter = require("./animals.js");
app.use("/animals", animalsRouter);

app.listen(PORT, () => {
  console.log(`Server is listening on ${PORT}`);
});

expressions.js

const express = require("express");

const {
  getElementById,
  getIndexById,
  updateElement,
  seedElements,
  createElement,
} = require("./utils");

let expressions = [];
seedElements(expressions, "expressions");

expressionsRouter = express.Router();

// Get all expressions
expressionsRouter.get("/", (req, res, next) => {
  res.send(expressions);
});

// Get a single expression
expressionsRouter.get("/:id", (req, res, next) => {
  const foundExpression = getElementById(req.params.id, expressions);
  if (foundExpression) {
    res.send(foundExpression);
  } else {
    res.status(404).send();
  }
});

// Update an expression
expressionsRouter.put("/:id", (req, res, next) => {
  const expressionIndex = getIndexById(req.params.id, expressions);
  if (expressionIndex !== -1) {
    updateElement(req.params.id, req.query, expressions);
    res.send(expressions[expressionIndex]);
  } else {
    res.status(404).send();
  }
});

// Create an expression
expressionsRouter.post("/", (req, res, next) => {
  const receivedExpression = createElement("expressions", req.query);
  if (receivedExpression) {
    expressions.push(receivedExpression);
    res.status(201).send(receivedExpression);
  } else {
    res.status(400).send();
  }
});

// Delete an expression
expressionsRouter.delete("/:id", (req, res, next) => {
  const expressionIndex = getIndexById(req.params.id, expressions);
  if (expressionIndex !== -1) {
    expressions.splice(expressionIndex, 1);
    res.status(204).send();
  } else {
    res.status(404).send();
  }
});

module.exports = expressionsRouter;