Solution

src/createServer.js

@@ -1,3 +1,71 @@
-// Write code here
-// Also, you can create additional files in the src folder
-// and import (require) them here
+const http = require('http');
+const { convertToCase } = require('./convertToCase/convertToCase.js');
+const SUPPORTED_CASES = ['SNAKE', 'KEBAB', 'CAMEL', 'PASCAL', 'UPPER'];
+
+function createServer() {
+  const server = http.createServer((req, res) => {
+    if (req.method !== 'GET') {
+      res.statusCode = 404;
+      res.setHeader('Content-Type', 'application/json');
+      res.end(JSON.stringify({ error: 'Not Found' }));
+
+      return;
+    }
+
+    const myUrl = new URL(req.url, `http://${req.headers.host}`);
+    const text = decodeURIComponent(myUrl.pathname.slice(1));
+    const toCase = myUrl.searchParams.get('toCase');
+    const errors = [];
+
+    if (!text) {
+      errors.push({
+        message: `Text to convert is required. Correct request is: "/<TEXT_TO_CONVERT>?toCase=<CASE_NAME>".`,
+      });
+    }
+
+    if (!toCase) {
+      res.statusCode = 400;
+      res.statusMessage = 'Bad request';
+      res.setHeader('Content-Type', 'application/json');
+
+      errors.push({
+        message: `"toCase" query param is required. Correct request is: "/<TEXT_TO_CONVERT>?toCase=<CASE_NAME>".`,
+      });
+    } else if (!SUPPORTED_CASES.includes(toCase.toUpperCase())) {
+      errors.push({
+        message:
+          'This case is not supported. Available cases: ' +
+          'SNAKE, KEBAB, CAMEL, PASCAL, UPPER.',
+      });
+    }
+
+    if (errors.length > 0) {
+      res.statusCode = 400;
+      res.statusMessage = 'Bad request';
+      res.setHeader('Content-Type', 'application/json');
+      res.end(JSON.stringify({ errors }));
+
+      return;
+    }
+
+    const toCaseRes = toCase.toUpperCase();
+    const result = convertToCase(text, toCaseRes);
+
+    const response = {
+      originalText: text,
+      targetCase: toCaseRes,
+      ...result,
+    };
+
+    res.statusCode = 200;
+    res.statusMessage = 'OK';
+    res.setHeader('Content-Type', 'application/json');
+    res.end(JSON.stringify(response));
+  });
+
+  return server;
+}
+
+module.exports = {
+  createServer,
+};

src/request.js

@@ -0,0 +1,6 @@
+// const axios = require('axios');
+// const url = 'http://localhost:5700/hello?toCase=upper';
+
+// axios.get(url)
+//   .then(res => console.log(res.data))
+//   .catch(err => console.log(err.message));