Feat: adds the currency convertor and audit log

Author: kksaunders251

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

@@ -0,0 +1,15 @@
+package com.codedifferently.lesson17.bank;
+
+public class AuditLog {
+    private final List<String> entries = new ArrayList<>();
+
+    public void record(String message) {
+        entries.add(LocalDateTime.now() + " - " + message);
+    }
+
+    public List<String> getEntries() {
+        return entries;
+    }
+}
+
+

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

@@ -1,17 +1,30 @@
 package com.codedifferently.lesson17.bank;
 
-import com.codedifferently.lesson17.bank.exceptions.AccountNotFoundException;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
 
+import com.codedifferently.lesson17.bank.exceptions.AccountNotFoundException;
+
 /** 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 AuditLog auditLog();
+  private final CurrencyConverter currencyConverter();
+
+  public BankAtm(AuditLog auditLog, CurrencyConverter currencyConverter){
 
+    this.auditLog() = auditLog;
+    this.currencyConverter() = currencyConverter;
+  }
+  
+
+
+  }
   /**
    * Adds a checking account to the bank.
    *
@@ -85,4 +98,4 @@ private CheckingAccount getAccountOrThrow(String accountNumber) {
     }
     return account;
   }
-}
+

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

@@ -0,0 +1,18 @@
+package com.codedifferently.lesson17.bank;
+
+public class CurrencyConverter {
+    private final Map<Currency, Double> exchangeRates;
+
+    public CurrencyConverter() {
+        exchangeRates = new HashMap<>();
+        exchangeRates.put(Currency.USD, 1.0); 
+        exchangeRates.put(Currency.EUR, 1.1);
+        exchangeRates.put(Currency.GBP, 1.3);
+       
+    }
+
+    public double convert(double amount, Currency from, Currency to) {
+        double usd = amount / exchangeRates.get(from);
+        return usd * exchangeRates.get(to);
+    }
+}