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const fs = require("fs");
const express = require("express");
function readUsersFromJSONFile(JSON_filename) {
/*
** Return the list of users stored in the JSON file
** JSON_filename: path to the JSON file
*/
const content = fs.readFileSync(JSON_filename, (err) => {
if (err) {
console.error(err);
return;
}
});
return JSON.parse(content).users;
}
function writeUsersToJSONFile(JSON_filename, users) {
/*
** Overwrite the given JSON_filename with the given
** list of users.
** JSON_filename: path to the JSON file
** users : list of users objects
*/
const usersJSON = JSON.stringify({ users: users });
fs.writeFileSync(JSON_filename, usersJSON, (err) => {
if (err) {
console.error(err);
return;
}
});
}
function epiTinderWebServer(host, port, filename) {
const app = express();
app.use(express.json());
const users = readUsersFromJSONFile(filename);
let maxID = 0;
if (users.length > 0) {
maxID = Math.max(...users.map((e) => e.id)) + 1;
}
app.get("/", (req, res) => {
res.status(200).send({ message: "Hello World!" });
});
app.get("/users", (req, res) => {
res.status(200).send(users);
});
app.post("/users", (req, res) => {
const new_user = {
id: maxID++,
name: req.body.name,
age: req.body.age,
description: req.body.description,
};
users.push(new_user);
writeUsersToJSONFile(filename, users);
res.status(201).send(new_user);
});
app.get("/users/:id", (req, res) => {
const u = users.find((e) => e.id == req.params.id);
if (u == undefined) {
res.status(404).send({
message: `No user with id: ${req.params.id} found`,
});
} else {
res.status(200).send(u);
}
});
app.put("/users/:id", (req, res) => {
const u = users.findIndex((e) => e.id == req.params.id);
if (u == -1) {
res.status(404).send({
message: `No user with id: ${req.params.id} found`,
});
} else {
users[u].name = req.body.name;
users[u].age = req.body.age;
users[u].description = req.body.description;
writeUsersToJSONFile(filename, users);
res.status(201).send(users[u]);
}
});
app.delete("/users/:id", (req, res) => {
const u = users.findIndex((e) => e.id == req.params.id);
if (u == -1) {
res.status(404).send({
message: `No user with id: ${req.params.id} found`,
});
} else {
const usr = users[u];
users.splice(u, 1);
writeUsersToJSONFile(filename, users);
res.status(200).send(usr);
}
});
app.get("*", (req, res) => {
res.status(404).send({ message: "Not found" });
});
return app.listen(port, () => {
console.log("Server running at http://" + host + ":" + port + "/");
});
}
module.exports = {
epiTinderWebServer,
};
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