developed

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 +1,15 @@
 'use strict';
 
-// Write your code here
+const { checkIsValidUserInput } = require('./modules/checkIsValidUserInput');
+const { generateRandomNumber } = require('./modules/generateRandomNumber');
+const { getBullsAndCows } = require('./modules/getBullsAndCows');
+
+const numberToGuess = generateRandomNumber();
+const userInput = process.argv.slice(2).join('');
+
+// eslint-disable-next-line no-console
+console.log(userInput);
+
+if (checkIsValidUserInput(userInput)) {
+  getBullsAndCows(userInput, numberToGuess);
+}

src/modules/checkIsValidUserInput.js

@@ -9,7 +9,30 @@
  * @return {boolean} - True if the user input is valid, false otherwise
  */
 function checkIsValidUserInput(userInput) {
-  /* Write your code here */
+  const numbers = userInput.split('');
+  const set = new Set(numbers);
+
+  const isValid = numbers.every((num) => {
+    return !isNaN(+num);
+  });
+
+  if (!isValid) {
+    return false;
+  }
+
+  if (+numbers[0] === 0) {
+    return false;
+  }
+
+  if (set.size < numbers.length) {
+    return false;
+  }
+
+  if (numbers.length !== 4) {
+    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 digits = [];
+
+  while (digits.length < 4) {
+    const randomDigit = Math.floor(Math.random() * 10);
+
+    if (!digits.includes(randomDigit) && randomDigit !== 0) {
+      digits.push(randomDigit);
+    }
+  }
+
+  return parseInt(digits.join(''), 10);
 }
 
 module.exports = {

src/modules/getBullsAndCows.js

@@ -13,7 +13,19 @@
  * Example: { bulls: 1, cows: 2 }
  */
 function getBullsAndCows(userInput, numberToGuess) {
-  /* Write your code here */
+  const result = { bulls: 0, cows: 0 };
+  const userInputSplited = userInput.toString().split('');
+  const numberToGuessSplited = numberToGuess.toString().split('');
+
+  numberToGuessSplited.forEach((num, i) => {
+    if (num === userInputSplited[i]) {
+      result.bulls++;
+    } else if (userInputSplited.includes(num)) {
+      result.cows++;
+    }
+  });
+
+  return result;
 }
 
 module.exports = {