add 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",
@@ -27,5 +27,8 @@
   },
   "mateAcademy": {
     "projectType": "javascript"
+  },
+  "dependencies": {
+    "readline": "^1.3.0"
   }
 }

readme.md

@@ -1,6 +1,6 @@
 # The "Bulls & Cows" game
 
-**Read [the guideline](https://github.com/mate-academy/js_task-guideline/blob/master/README.md) before start**
+**Read [the guideline](https://github.com/mate-academy/js_tasknpm-guideline/blob/master/README.md) before start**
 
 Implement `Bulls and cows` game so the user can run and play it using command line.
 

src/app.js

@@ -1,3 +1,39 @@
 'use strict';
 
 // Write your code here
+const readline = require('readline');
+const { checkIsValidUserInput } = require('./modules/checkIsValidUserInput');
+const { generateRandomNumber } = require('./modules/generateRandomNumber');
+const { getBullsAndCows } = require('./modules/getBullsAndCows');
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+const randomNum = generateRandomNumber();
+
+function playGame() {
+  rl.question('Make your guess: ', (answer) => {
+    if (!checkIsValidUserInput(answer)) {
+      // eslint-disable-next-line
+      console.log('Please enter a valid 4 digit number that not starts with 0');
+
+      playGame();
+    } else {
+      const bullsAndCows = getBullsAndCows(answer, randomNum);
+      // eslint-disable-next-line
+      console.log(`Bulls: ${bullsAndCows.bulls}, Cows: ${bullsAndCows.cows}`);
+
+      if (bullsAndCows.bulls === 4) {
+        // eslint-disable-next-line
+        console.log('Congratulations! You guessed the correct number.');
+        rl.close();
+      } else {
+        playGame();
+      }
+    }
+  });
+}
+
+playGame();

src/modules/checkIsValidUserInput.js

@@ -10,6 +10,29 @@
  */
 function checkIsValidUserInput(userInput) {
   /* Write your code here */
+  const numbers = '0123456789';
+
+  if (userInput.length !== 4) {
+    return false;
+  }
+
+  if (userInput[0] === '0') {
+    return false;
+  }
+
+  for (let i = 0; i < userInput.length - 1; i++) {
+    if (!numbers.includes(userInput[i])) {
+      return false;
+    }
+
+    for (let j = i + 1; j < userInput.length; j++) {
+      if (userInput[i] === userInput[j]) {
+        return false;
+      }
+    }
+  }
+
+  return true;
 }
 
 module.exports = {

src/modules/generateRandomNumber.js

@@ -7,9 +7,25 @@
  * @return {number} A random 4-digit number
  */
 function generateRandomNumber() {
-  /* Write your code here */
+  const digits = [];
+
+  digits.push(randomNumber(1, 9));
+
+  while (digits.length < 4) {
+    const nextDigit = randomNumber(0, 9);
+
+    if (!digits.includes(nextDigit)) {
+      digits.push(nextDigit);
+    }
+  }
+
+  return parseInt(digits.join(''), 10);
 }
 
+const randomNumber = (min, max) => {
+  return Math.floor(Math.random() * (max - min + 1)) + min;
+};
+
 module.exports = {
   generateRandomNumber,
 };

src/modules/getBullsAndCows.js

@@ -13,7 +13,25 @@
  * Example: { bulls: 1, cows: 2 }
  */
 function getBullsAndCows(userInput, numberToGuess) {
-  /* Write your code here */
+  const userDigits = userInput.toString().split('');
+  const guessDigits = numberToGuess.toString().split('');
+  const result = {
+    bulls: 0,
+    cows: 0,
+  };
+
+  for (let i = 0; i < userDigits.length; i++) {
+    if (guessDigits.includes(userDigits[i])) {
+      result.cows++;
+    }
+
+    if (userDigits[i] === guessDigits[i]) {
+      result.bulls++;
+      result.cows--;
+    }
+  }
+
+  return result;
 }
 
 module.exports = {