Fix: lesson17 upload files

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/BankAccount.java

@@ -0,0 +1,132 @@
+package com.codedifferently.lesson17.bank;
+
+import com.codedifferently.lesson17.bank.exceptions.InsufficientFundsException;
+import java.util.Set;
+
+/** Represents a checking account. */
+public class BankAccount {
+
+  private final Set<Customer> owners;
+  private final String accountNumber;
+  private double balance;
+  private boolean isActive;
+
+  /**
+   * Creates a new checking account.
+   *
+   * @param accountNumber The account number.
+   * @param owners The owners of the account.
+   * @param initialBalance The initial balance of the account.
+   */
+  // Constructor
+  public BankAccount(String accountNumber, Set<Customer> owners, double initialBalance) {
+    this.accountNumber = accountNumber;
+    this.owners = owners;
+    this.balance = initialBalance;
+    isActive = true;
+  }
+
+  /**
+   * Gets the account number.
+   *
+   * @return The account number.
+   */
+  public String getAccountNumber() {
+    return accountNumber;
+  }
+
+  /**
+   * Gets the owners of the account.
+   *
+   * @return The owners of the account.
+   */
+  public Set<Customer> getOwners() {
+    return owners;
+  }
+
+  /**
+   * Deposits funds into the account.
+   *
+   * @param amount The amount to deposit.
+   */
+  public void deposit(double amount) throws IllegalStateException {
+    if (isClosed()) {
+      throw new IllegalStateException("Cannot deposit to a closed account");
+    }
+    if (amount <= 0) {
+      throw new IllegalArgumentException("Deposit amount must be positive");
+    }
+    balance += amount;
+  }
+
+  /**
+   * Withdraws funds from the account.
+   *
+   * @param amount
+   * @throws InsufficientFundsException
+   */
+  public void withdraw(double amount) throws InsufficientFundsException {
+    if (isClosed()) {
+      throw new IllegalStateException("Cannot withdraw from a closed account");
+    }
+    if (amount <= 0) {
+      throw new IllegalStateException("Withdrawal amount must be positive");
+    }
+    if (balance < amount) {
+      throw new InsufficientFundsException("Account does not have enough funds for withdrawal");
+    }
+    balance -= amount;
+  }
+
+  /**
+   * Gets the balance of the account.
+   *
+   * @return The balance of the account.
+   */
+  public double getBalance() {
+    return balance;
+  }
+
+  /** Closes the account. */
+  public void closeAccount() throws IllegalStateException {
+    if (balance > 0) {
+      throw new IllegalStateException("Cannot close account with a positive balance");
+    }
+    isActive = false;
+  }
+
+  /**
+   * Checks if the account is closed.
+   *
+   * @return True if the account is closed, otherwise false.
+   */
+  public boolean isClosed() {
+    return !isActive;
+  }
+
+  @Override
+  public int hashCode() {
+    return accountNumber.hashCode();
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (obj instanceof BankAccount other) {
+      return accountNumber.equals(other.accountNumber);
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return "BankAccount{"
+        + "accountNumber='"
+        + accountNumber
+        + '\''
+        + ", balance="
+        + balance
+        + ", isActive="
+        + isActive
+        + '}';
+  }
+}

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/BankAtm.java

@@ -5,19 +5,20 @@
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
+import java.util.stream.Collectors;
 
 /** Represents a bank ATM. */
 public class BankAtm {
 
   private final Map<UUID, Customer> customerById = new HashMap<>();
-  private final Map<String, CheckingAccount> accountByNumber = new HashMap<>();
+  private final Map<String, BankAccount> accountByNumber = new HashMap<>();
 
   /**
-   * Adds a checking account to the bank.
+   * Adds an account to the bank.
    *
    * @param account The account to add.
    */
-  public void addAccount(CheckingAccount account) {
+  public void addAccount(BankAccount account) {
     accountByNumber.put(account.getAccountNumber(), account);
     account
         .getOwners()
@@ -33,9 +34,9 @@ public void addAccount(CheckingAccount account) {
    * @param customerId The ID of the customer.
    * @return The unique set of accounts owned by the customer.
    */
-  public Set<CheckingAccount> findAccountsByCustomerId(UUID customerId) {
+  public Set<BankAccount> findAccountsByCustomerId(UUID customerId) {
     return customerById.containsKey(customerId)
-        ? customerById.get(customerId).getAccounts()
+        ? customerById.get(customerId).getAccounts().stream().collect(Collectors.toSet())
         : Set.of();
   }
 
@@ -46,7 +47,7 @@ public Set<CheckingAccount> findAccountsByCustomerId(UUID customerId) {
    * @param amount The amount to deposit.
    */
   public void depositFunds(String accountNumber, double amount) {
-    CheckingAccount account = getAccountOrThrow(accountNumber);
+    BankAccount account = getAccountOrThrow(accountNumber);
     account.deposit(amount);
   }
 
@@ -56,8 +57,8 @@ public void depositFunds(String accountNumber, double amount) {
    * @param accountNumber The account number.
    * @param check The check to deposit.
    */
-  public void depositFunds(String accountNumber, Check check) {
-    CheckingAccount account = getAccountOrThrow(accountNumber);
+  public void depositFunds(String accountNumber, Check check) throws Exception {
+    BankAccount account = getAccountOrThrow(accountNumber);
     check.depositFunds(account);
   }
 
@@ -67,8 +68,8 @@ public void depositFunds(String accountNumber, Check check) {
    * @param accountNumber
    * @param amount
    */
-  public void withdrawFunds(String accountNumber, double amount) {
-    CheckingAccount account = getAccountOrThrow(accountNumber);
+  public void withdrawFunds(String accountNumber, double amount) throws Exception {
+    BankAccount account = getAccountOrThrow(accountNumber);
     account.withdraw(amount);
   }
 
@@ -78,8 +79,8 @@ public void withdrawFunds(String accountNumber, double amount) {
    * @param accountNumber The account number.
    * @return The account.
    */
-  private CheckingAccount getAccountOrThrow(String accountNumber) {
-    CheckingAccount account = accountByNumber.get(accountNumber);
+  private BankAccount getAccountOrThrow(String accountNumber) {
+    BankAccount account = accountByNumber.get(accountNumber);
     if (account == null || account.isClosed()) {
       throw new AccountNotFoundException("Account not found");
     }

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/BusinessAccount.java

@@ -0,0 +1,34 @@
+package com.codedifferently.lesson17.bank;
+
+import java.util.Set;
+
+import com.codedifferently.lesson17.bank.exceptions.InsufficientFundsException;
+
+public class BusinessAccount extends CheckingAccount {
+
+    /**
+     * Creates a new business account.
+     *
+     * @param accountNumber  The account number.
+     * @param owners         The owners of the account.
+     * @param initialBalance The initial balance of the account.
+     */
+    public BusinessAccount(String accountNumber, Set<Customer> owners, double initialBalance) {
+        super(accountNumber, owners, initialBalance);
+    }
+
+    /**
+     * Withdraws funds from the account.
+     *
+     * @param amount The amount to withdraw.
+     * @throws InsufficientFundsException If there are insufficient funds in the account.
+     */
+    @Override
+    public void withdraw(double amount) throws InsufficientFundsException {
+        if (amount > getBalance()) {
+            throw new InsufficientFundsException("Insufficient funds in the account.");
+        }
+        super.withdraw(amount);
+    }
+
+}

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/BusinessCheckingAccount.java

@@ -0,0 +1,23 @@
+package com.codedifferently.lesson17.bank;
+
+import com.codedifferently.lesson17.bank.exceptions.InvalidBusinessAccountException;
+import java.util.Set;
+
+/**
+ * Creates a business account.
+ *
+ * @param accountNumber The account number.
+ * @param owners The owners of the account.
+ * @param initialBalance The initial balance of the account.
+ */
+public class BusinessCheckingAccount extends CheckingAccount {
+  public BusinessCheckingAccount(
+      String accountNumber, Set<Customer> owners, double initialBalance) {
+    super(accountNumber, owners, initialBalance);
+
+    boolean hasBusinessOwner = owners.stream().anyMatch(customer -> customer.isBusiness());
+    if (!hasBusinessOwner) {
+      throw new InvalidBusinessAccountException("At least one owner must be a business.");
+    }
+  }
+}

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/Check.java

@@ -2,7 +2,6 @@
 
 import com.codedifferently.lesson17.bank.exceptions.CheckVoidedException;
 
-/** Represents a check. */
 public class Check {
 
   private final String checkNumber;
@@ -44,8 +43,9 @@ public void voidCheck() {
    * Deposits the check into an account.
    *
    * @param toAccount The account to deposit the check into.
+   * @throws Exception
    */
-  public void depositFunds(CheckingAccount toAccount) {
+  public void depositFunds(BankAccount toAccount) throws Exception {
     if (isVoided) {
       throw new CheckVoidedException("Check is voided");
     }