From 8a685c5d66207461a4bbd51f4e18a6350c581825 Mon Sep 17 00:00:00 2001
From: Nazarii-Lesniak <naziksay@gmail.com>
Date: Sun, 22 Mar 2026 13:47:05 +0200
Subject: [PATCH 1/2] solution

---
 src/createServer.js | 43 +++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 41 insertions(+), 2 deletions(-)

diff --git a/src/createServer.js b/src/createServer.js
index 1cf1dda..649ed31 100644
--- a/src/createServer.js
+++ b/src/createServer.js
@@ -1,8 +1,47 @@
 'use strict';
 
+const http = require('http');
+const fs = require('fs');
+const path = require('path');
+
 function createServer() {
-  /* Write your code here */
-  // Return instance of http.Server class
+  return http.createServer((request, response) => {
+    if (request.url === '/add-expense' && request.method === 'POST') {
+      const chunks = [];
+
+      request.on('data', (chunk) => {
+        chunks.push(chunk);
+      });
+
+      request.on('end', () => {
+        try {
+          const parsedData = JSON.parse(Buffer.concat(chunks).toString());
+
+          if (!parsedData.amount || !parsedData.title || !parsedData.date) {
+            response.statusCode = 400;
+            response.end('Invalid data');
+
+            return;
+          }
+
+          const db = path.join(__dirname, '../db/expense.json');
+          const stringifiedData = JSON.stringify(parsedData);
+
+          fs.writeFileSync(db, stringifiedData);
+
+          response.statusCode = 200;
+          response.setHeader('Content-Type', 'application/json');
+          response.end(JSON.stringify(parsedData));
+        } catch {
+          response.statusCode = 400;
+          response.end('Invalid data');
+        }
+      });
+    } else {
+      response.statusCode = 404;
+      response.end('Not Found');
+    }
+  });
 }
 
 module.exports = {

From cd2cbd7b731712e91989299ad6449135b0021790 Mon Sep 17 00:00:00 2001
From: Nazarii-Lesniak <naziksay@gmail.com>
Date: Sun, 22 Mar 2026 16:40:21 +0200
Subject: [PATCH 2/2] changed

---
 src/createServer.js | 61 ++++++++++++++++++++++++++++++++++++++-------
 src/index.html      | 16 ++++++++++++
 2 files changed, 68 insertions(+), 9 deletions(-)
 create mode 100644 src/index.html

diff --git a/src/createServer.js b/src/createServer.js
index 649ed31..d7d3192 100644
--- a/src/createServer.js
+++ b/src/createServer.js
@@ -6,7 +6,22 @@ const path = require('path');
 
 function createServer() {
   return http.createServer((request, response) => {
-    if (request.url === '/add-expense' && request.method === 'POST') {
+    if (request.url === '/' && request.method === 'GET') {
+      const htmlPath = path.resolve(__dirname, 'index.html');
+
+      fs.readFile(htmlPath, 'utf-8', (error, data) => {
+        if (error) {
+          response.statusCode = 500;
+          response.end('Internal Server Error');
+
+          return;
+        }
+
+        response.statusCode = 200;
+        response.setHeader('Content-Type', 'text/html');
+        response.end(data);
+      });
+    } else if (request.url === '/add-expense' && request.method === 'POST') {
       const chunks = [];
 
       request.on('data', (chunk) => {
@@ -15,7 +30,18 @@ function createServer() {
 
       request.on('end', () => {
         try {
-          const parsedData = JSON.parse(Buffer.concat(chunks).toString());
+          const bodyStr = Buffer.concat(chunks).toString();
+          let parsedData;
+
+          const contentType = request.headers['content-type'] || '';
+
+          if (contentType === 'application/json') {
+            parsedData = JSON.parse(bodyStr);
+          } else {
+            const params = new URLSearchParams(bodyStr);
+
+            parsedData = Object.fromEntries(params);
+          }
 
           if (!parsedData.amount || !parsedData.title || !parsedData.date) {
             response.statusCode = 400;
@@ -24,15 +50,32 @@ function createServer() {
             return;
           }
 
-          const db = path.join(__dirname, '../db/expense.json');
-          const stringifiedData = JSON.stringify(parsedData);
+          const dbPath = path.join(__dirname, '../db/expense.json');
+
+          fs.writeFile(dbPath, JSON.stringify(parsedData, null, 2), (error) => {
+            if (error) {
+              response.statusCode = 500;
+              response.end('Internal Server Error');
+
+              return;
+            }
+
+            const accept = request.headers.accept || '';
 
-          fs.writeFileSync(db, stringifiedData);
+            if (accept.includes('text/html')) {
+              response.statusCode = 200;
+              response.setHeader('Content-Type', 'text/html');
 
-          response.statusCode = 200;
-          response.setHeader('Content-Type', 'application/json');
-          response.end(JSON.stringify(parsedData));
-        } catch {
+              response.end(`
+                <pre>${JSON.stringify(parsedData, null, 2)}</pre>
+              `);
+            } else {
+              response.statusCode = 200;
+              response.setHeader('Content-Type', 'application/json');
+              response.end(JSON.stringify(parsedData));
+            }
+          });
+        } catch (error) {
           response.statusCode = 400;
           response.end('Invalid data');
         }
diff --git a/src/index.html b/src/index.html
new file mode 100644
index 0000000..1f6605c
--- /dev/null
+++ b/src/index.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Document</title>
+</head>
+<body>
+  <form method="post" action="/add-expense">
+    <input type="text" name="title" placeholder="Title">
+    <input type="text" name="amount" placeholder="Amount">
+    <input type="text" name="date" placeholder="Date">
+    <button type="submit">Add Expense</button>
+  </form>
+</body>
+</html>