Halyna R.

task-1/leap-year.js

@@ -1,9 +1,17 @@
-import promptSync from 'prompt-sync';
+import promptSync from "prompt-sync";
 const prompt = promptSync();
 
+const input_year = prompt("Enter a year(1-9999):  ");
+const year = Number(input_year);
 
-// Write your code here
-// Guidance:
-// Step 1: prompt the user to enter a year
-// Step 2: convert the user input to a number so we can perform calculations
-// Step 3: Implement the logic
+if (!Number.isInteger(year) || year < 1 || year > 9999) {
+  console.log("Invalid year!");
+} else {
+  const isLeap = year % 400 === 0 || (year % 4 === 0 && year % 100 !== 0);
+
+  if (isLeap) {
+    console.log("Yes, " + year + " is a leap year");
+  } else {
+    console.log("No, " + year + " is not a leap year");
+  }
+}

task-2/login.js

@@ -3,10 +3,37 @@ import { showMessage } from './app.js';
 
 let incorrectAttempts = 0;
 
+function errorMessage(message) {
+  showMessage(message, "error");
+}
+
+function successMessage(message) {
+  showMessage(message, "success");
+}
+
 function onLogin(username, password) {
-  // Write your code here.
-  // Use the variables 'username' and 'password' to access the input values
-  // Use incorrectAttempts to track the number of failed attempts
+    if (incorrectAttempts >= 4) {
+    errorMessage("Login blocked: Too many incorrect attempts", "error");
+    return;
+  }
+
+  // 2) check valid credentials
+  const isValid =
+    (username === "admin" && password === "Hack1234") ||
+    (username === "user" && password === "7654321");
+
+  if (isValid) {
+    successMessage("Logged in successfully");
+  } else {
+    incorrectAttempts += 1;
+
+    // after increment, if now blocked -> show blocked (requirement 3+4)
+    if (incorrectAttempts >= 4) {
+      errorMessage("Login blocked: Too many incorrect attempts", "error");
+    } else {
+      errorMessage("Incorrect credentials", "error");
+    }
+  }
 }
 
 // Do not change the line below

task-3/converter.js

@@ -5,18 +5,19 @@ const prompt = promptSync();
 const EUR_USD_RATE = 1.1643;
 
 // Menu display
-conole.log("Hello and welcome to the currency converter. Please choose: ");
+console.log("Hello and welcome to the currency converter. Please choose: ");//1 bug
 console.log("1: Convert EUR to USD");
 console.log("2: Convert USD to EUR");
-const menuSelection = prompt("Select your option [1 or 2]: ");
+console.log("3: Display the current exchange rate");
+const menuSelection = prompt("Select your option [1, 2 or 3]: ");
 
 console.log("\n");
 
 if (menuSelection === "1") {
   // EUR to USD
   const eurAmountInput = prompt("Enter amount in EUR: ");
   const eurAmountNum = Number(eurAmountInput);
-  if (Number.isNaN(eurAmountNum) || eurAmountNum > 0) {
+  if (Number.isNaN(eurAmountNum) || eurAmountNum < 0) {//2 bug
     console.log("Please enter a valid positive number for the amount.");
   } else {
     const usdAmount = eurAmountNum * EUR_USD_RATE;
@@ -29,8 +30,22 @@ if (menuSelection === "1") {
   if (Number.isNaN(usdAmountNum) || usdAmountNum < 0) {
     console.log("Please enter a valid positive number for the amount.");
   } else {
-    const eurAmount = usdAmountNum / eur_usd_rate;
-    console.log(usdAmountNum.toFixed(2) + ' USD is equal to ' + usdAmountNum.toFixed(2) + ' EUR.');
+    const eurAmount = usdAmountNum / EUR_USD_RATE;//3 bug
+    console.log(usdAmountNum.toFixed(2) + ' USD is equal to ' + eurAmount.toFixed(2) + ' EUR.');
+  }} else if (menuSelection === "3") {
+    console.log(`The current exchange rate is 1 EUR = ${EUR_USD_RATE} USD.`);
+  } else if (menuSelection === "1") {
+  // EUR -> USD
+      const eurAmountInput = prompt("Enter amount in EUR: ");
+      const eurAmountNum = Number(eurAmountInput);
+
+  if (Number.isNaN(eurAmountNum) || eurAmountNum <= 0) {
+    console.log("Please enter a valid positive number for the amount.");
+  } else {
+    const usdAmount = eurAmountNum * EUR_USD_RATE;
+    console.log(
+      `${eurAmountNum.toFixed(2)} EUR is equal to ${usdAmount.toFixed(2)} USD.`
+    );
   }
 } else {
   console.log("Invalid selection. Please choose either 1 or 2.");