Implement case transformer server

.github/workflows/test.yml-template

@@ -0,0 +1,23 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test

package.json

@@ -17,7 +17,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^2.1.3",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",

src/createServer.js

@@ -1,3 +1,63 @@
-// 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');
+
+const createServer = () => {
+  return http.createServer((req, res) => {
+    const [rawText, queryString] = req.url.split('?');
+    const text = rawText.slice(1);
+    const params = new URLSearchParams(queryString);
+    const toCase = params.get('toCase');
+    const supportedCases = ['SNAKE', 'KEBAB', 'CAMEL', 'PASCAL', 'UPPER'];
+    const errors = [];
+
+    if (text === '') {
+      errors.push({
+        message:
+          'Text to convert is required. Correct request is: ' +
+          '"/<TEXT_TO_CONVERT>?toCase=<CASE_NAME>".',
+      });
+    }
+
+    if (toCase === null) {
+      errors.push({
+        message:
+          '"toCase" query param is required. Correct request is: ' +
+          '"/<TEXT_TO_CONVERT>?toCase=<CASE_NAME>".',
+      });
+    }
+
+    if (toCase !== null && !supportedCases.includes(toCase.toUpperCase())) {
+      errors.push({
+        message:
+          'This case is not supported. Available cases: SNAKE, KEBAB, ' +
+          'CAMEL, PASCAL, UPPER.',
+      });
+    }
+
+    if (errors.length > 0) {
+      res.setHeader('Content-Type', 'application/json');
+      res.statusCode = 400;
+      res.statusMessage = 'Bad request';
+      res.end(JSON.stringify({ errors }));
+
+      return;
+    }
+
+    const result = convertToCase(text, toCase);
+
+    res.setHeader('Content-Type', 'application/json');
+    res.statusCode = 200;
+    res.statusMessage = 'OK';
+
+    res.end(
+      JSON.stringify({
+        originalCase: result.originalCase,
+        targetCase: toCase,
+        originalText: text,
+        convertedText: result.convertedText,
+      }),
+    );
+  });
+};
+
+module.exports = { createServer };