Solution

.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

@@ -18,7 +18,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^1.9.12",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",

src/app.js

@@ -1,3 +1,27 @@
 'use strict';
 
 // Write your code here
+const readline = require('node:readline');
+const { generateRandomNumber } = require('../src/modules/generateRandomNumber');
+const {
+  checkIsValidUserInput,
+} = require('../src/modules/checkIsValidUserInput');
+const { getBullsAndCows } = require('../src/modules/getBullsAndCows');
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+const generatedNumber = generateRandomNumber();
+
+rl.question('Enter your number: ', (userInput) => {
+  if (checkIsValidUserInput(userInput)) {
+    // eslint-disable-next-line no-console
+    console.log(getBullsAndCows(userInput, generatedNumber));
+  } else {
+    // eslint-disable-next-line no-console
+    console.log(`Your number is not valid`);
+  }
+  rl.close();
+});

src/modules/checkIsValidUserInput.js

@@ -9,7 +9,15 @@
  * @return {boolean} - True if the user input is valid, false otherwise
  */
 function checkIsValidUserInput(userInput) {
-  /* Write your code here */
+  if (
+    userInput[0] === '0' ||
+    new Set(userInput).size !== 4 ||
+    isNaN(userInput)
+  ) {
+    return false;
+  }
+
+  return true;
 }
 
 module.exports = {

src/modules/generateRandomNumber.js

@@ -7,7 +7,13 @@
  * @return {number} A random 4-digit number
  */
 function generateRandomNumber() {
-  /* Write your code here */
+  const randomNumber = Math.floor(Math.random() * (10000 - 1) + 1);
+
+  if (new Set(randomNumber.toString()).size !== 4) {
+    return generateRandomNumber();
+  } else {
+    return randomNumber;
+  }
 }
 
 module.exports = {

src/modules/getBullsAndCows.js

@@ -13,7 +13,22 @@
  * Example: { bulls: 1, cows: 2 }
  */
 function getBullsAndCows(userInput, numberToGuess) {
-  /* Write your code here */
+  const userInputStr = userInput.toString();
+  const numberToGuessStr = numberToGuess.toString();
+  const result = { bulls: 0, cows: 0 };
+
+  for (let i = 0; i < numberToGuessStr.length; i++) {
+    if (userInputStr[i] === numberToGuessStr[i]) {
+      result.bulls += 1;
+      continue;
+    }
+
+    if (numberToGuessStr.includes(userInputStr[i])) {
+      result.cows += 1;
+    }
+  }
+
+  return result;
 }
 
 module.exports = {