first step

Author: Tronix117

main.js

@@ -0,0 +1,71 @@
+const http = require('http');
+const Party = require('./models/party');
+
+function bodyMiddleware(req, res, next) {
+  if (['GET', 'HEAD', 'DELETE', 'OPTIONS'].includes(req.method)) {
+    return next(req, res);
+  }
+
+  let data = '';
+
+  req.on('data', (chunk) => data += chunk);
+  req.on('end', () => {
+    try {
+      data = JSON.parse(data);
+    } catch {
+      res.statusCode = 400
+      return res.end('JSON body is invalid');
+    }
+
+    req.body = data;
+
+    next(req, res);
+  })
+}
+
+function errorMiddleware(req, res, next) {
+  try {
+    next(req, res);
+  } catch (err) {
+    res.statusCode = 500;
+    res.end(err.message);
+  }
+}
+
+function handleRequest(req, res) {
+  bodyMiddleware(req, res, (req, res) => errorMiddleware(req, res, handleRouting));
+}
+
+function handleRouting(req, res) {
+  if (req.method === 'POST' && req.url === '/party') {
+    Party.currentParty = new Party(req.body.min || 0, req.body.max || 100);
+    res.statusCode = 204;
+  } else if (req.method === 'PUT' && req.url === '/party/current') {
+    if (!Party.currentParty) {
+      throw new Error('No party');
+    }
+
+    const result = Party.currentParty.guess(req.body);
+    if (result === '=') {
+      res.write(`Félicitation, le chiffre était ${Party.currentParty.number}`);
+    } else {
+      res.write(result); // + or -
+    }
+    res.statusCode = 200;
+  } else if (req.method === 'GET' && req.url === '/party/current') {
+    if (!Party.currentParty) {
+      throw new Error('No party');
+    }
+
+    res.statusCode = 200;
+    res.write(Party.currentParty.guesses.join(', '));
+  } else {
+    res.statusCode = 404;
+  }
+
+  res.end();
+}
+
+
+const server = http.createServer(handleRequest);
+server.listen(8085);

models/party.js

@@ -0,0 +1,33 @@
+class Party {
+  number = null;
+  guesses = [];
+  score = null;
+  solved = false;
+  tries = 0;
+
+  static currentParty = null;
+
+  constructor(min, max) {
+    this.number = Math.floor(Math.random() * (max - min) + min);
+  }
+
+  guess(input) {
+    const inputNb = +input;
+    if (isNaN(inputNb)) {
+      throw new Error('Input is not a number')
+    }
+    
+    this.tries++;
+    this.guesses.push(input);
+
+    if (inputNb > this.number) return '-';
+    if (inputNb < this.number) return '+';
+
+    this.solved = true;
+    this.score = this.tries;
+
+    return '=';
+  }
+}
+
+module.exports = Party;