add task 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 +1,22 @@
 'use strict';
 
-// Write your code here
+import readline from 'readline';
+import { generateRandomNumber } from './modules/generateRandomNumber';
+import { checkIsValidUserInput } from './modules/checkIsValidUserInput';
+import { getBullsAndCows } from './modules/getBullsAndCows';
+
+const terminal = readline.createInterface(process.stdin, process.stdout);
+
+const numberToGuess = generateRandomNumber();
+
+terminal.question('Guess the number', (userNumber) => {
+  if (!checkIsValidUserInput(userNumber)) {
+    return;
+  }
+
+  if (userNumber === numberToGuess) {
+    terminal.close();
+  } else {
+    getBullsAndCows(userNumber, numberToGuess);
+  }
+});

src/modules/checkIsValidUserInput.js

@@ -9,7 +9,23 @@
  * @return {boolean} - True if the user input is valid, false otherwise
  */
 function checkIsValidUserInput(userInput) {
-  /* Write your code here */
+  if (userInput.length !== 4) {
+    return false;
+  }
+
+  if (userInput[0] === '0') {
+    return false;
+  }
+
+  const arr = [...userInput];
+
+  for (const num of arr) {
+    if (arr.filter((number) => number === num).length > 1 || isNaN(+num)) {
+      return false;
+    }
+  }
+
+  return true;
 }
 
 module.exports = {

src/modules/generateRandomNumber.js

@@ -7,7 +7,17 @@
  * @return {number} A random 4-digit number
  */
 function generateRandomNumber() {
-  /* Write your code here */
+  const numArr = [Math.floor(Math.random() * 9) + 1];
+
+  while (numArr.length < 4) {
+    const newNum = Math.floor(Math.random() * 9);
+
+    if (!numArr.includes(newNum)) {
+      numArr.push(newNum);
+    }
+  }
+
+  return +numArr.join('');
 }
 
 module.exports = {

src/modules/getBullsAndCows.js

@@ -13,7 +13,23 @@
  * Example: { bulls: 1, cows: 2 }
  */
 function getBullsAndCows(userInput, numberToGuess) {
-  /* Write your code here */
+  const score = {
+    bulls: 0,
+    cows: 0,
+  };
+
+  const userArr = [...String(userInput)];
+  const guessArr = [...String(numberToGuess)];
+
+  for (let i = 0; i < userArr.length; i++) {
+    if (guessArr[i] === userArr[i]) {
+      score.bulls += 1;
+    } else if (guessArr.includes(userArr[i])) {
+      score.cows += 1;
+    }
+  }
+
+  return score;
 }
 
 module.exports = {