feat: add second OOP lab

frontend-cert/js-projects/second-oop/script.js

@@ -0,0 +1,63 @@
+class BankAccount {
+    constructor(balance = 0) {
+      this.balance = balance;
+      this.transactions = [];
+    }
+
+    deposit(amount) {
+      if (amount > 0) {
+        this.transactions.push({ type: 'deposit', amount });
+        this.updateBalance();
+        console.log(`Successfully deposited $${amount}. New balance: $${this.balance}`);
+      } else {
+        console.log('Deposit amount must be greater than zero.');
+      }
+    }
+
+    withdraw(amount) {
+      if (amount > 0 && amount <= this.balance) {
+        this.transactions.push({ type: 'withdraw', amount });
+        this.updateBalance();
+        console.log(`Successfully withdrew $${amount}. New balance: $${this.balance}`);
+      } else {
+        console.log('Insufficient balance or invalid amount.');
+      }
+    }
+
+    checkBalance() {
+      console.log(`Current balance: $${this.balance}`);
+    }
+
+    updateBalance() {
+      this.balance = this.transactions.reduce((acc, transaction) => {
+        return transaction.type === 'deposit' ? acc + transaction.amount : acc - transaction.amount;
+      }, 0);
+    }
+
+    listAllDeposits() {
+      const deposits = this.transactions
+        .filter(transaction => transaction.type === 'deposit')
+        .map(transaction => transaction.amount);
+      console.log('Deposits:', deposits);
+      return deposits;
+    }
+
+    listAllWithdrawals() {
+      const withdrawals = this.transactions
+        .filter(transaction => transaction.type === 'withdraw')
+        .map(transaction => transaction.amount);
+      console.log('Withdrawals:', withdrawals);
+      return withdrawals;
+    }
+}
+
+const myAccount = new BankAccount();
+
+myAccount.deposit(100);
+myAccount.deposit(500);
+myAccount.withdraw(30);
+myAccount.withdraw(100);
+myAccount.checkBalance();
+myAccount.listAllDeposits();
+myAccount.listAllWithdrawals();
+

frontend-cert/js-projects/second-oop/user-stories.md

@@ -0,0 +1,13 @@
+1. You should define a class named `BankAccount` with a `constructor` that has a `balance` parameter. The default parameter value should be set to 0. The constructor should also initialize an empty `transactions` array to store transaction records.
+
+2. You should define a method named `updateBalance`.
+
+3. You should define a method named `deposit` with an `amount` parameter. This method should update `balance` accordingly.
+
+4. You should define a method named `withdraw` with an `amount` parameter. This method should update `balance` accordingly.
+
+5. You should define a method named `checkBalance` that returns the current balance.
+
+6. You should define a method named `listAllDeposits` that returns all deposits.
+
+7. You should define a method named `listAllWithdrawals` that returns all withdrawals.