Merge Main onto dev to keep dev up to date

.gitignore

@@ -33,7 +33,8 @@ build/
 !**/src/test/**/build/
 
 ### VS Code ###
-.vscode/
+#.vscode/
+!.vscode/settings.json
 
 ### Mac OS ###
-.DS_Store
+.DS_Store

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "java.configuration.updateBuildConfiguration": "interactive",
+    "java.format.settings.profile": "GoogleStyle",
+    "editor.formatOnSave": true,
+    "editor.defaultFormatter": "redhat.java",
+}

pom.xml

@@ -56,6 +56,15 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <version>3.12.0</version>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <version>3.3.1</version>
+                <configuration>
+                    <configLocation>google_checks.xml</configLocation>
+                    <failsOnError>true</failsOnError>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 

src/main/java/Main.java

@@ -1,2 +1 @@
-public class Main {
-}
+public class Main {}

src/main/java/millions/Exchange.java

@@ -0,0 +1,68 @@
+package millions;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+
+public class Exchange {
+  private String name;
+  private Map<String, Stock> stocks;
+  private int weekNumber;
+  private Random random = new Random();
+
+  public Exchange(String name, List<Stock> stockList) {
+    this.name = name;
+    this.stocks = new HashMap<>();
+    this.weekNumber = 1;
+
+    // Populate the stocks map to get ticker -> stock
+    for (Stock stock : stockList) {
+      this.stocks.put(stock.getSymbol(), stock);
+    }
+  }
+
+  public void buy(Player player, Stock stock, BigDecimal quantity) {
+    Share shareToBuy = new Share(stock, quantity, stock.getSalesPrice());
+    Purchase purchase = new Purchase(shareToBuy, this.weekNumber);
+    purchase.commit(player);
+  }
+
+  public void sell(Player player, Share share) {
+    Sale sale = new Sale(share, weekNumber);
+    sale.commit(player);
+  }
+
+  public Map<String, Stock> getStocks() {
+    return this.stocks;
+  }
+
+  public Stock getStock(String symbol) {
+    return this.stocks.get(symbol);
+  }
+
+  public boolean hasStock(String symbol) {
+    return this.stocks.containsKey(symbol);
+  }
+
+  public List<Stock> findStocks(String searchTerm) {
+    return this.stocks.values().stream()
+        .filter(s -> s.getSymbol().contains(searchTerm) || s.getCompany().contains(searchTerm))
+        .toList();
+  }
+
+  public void advance() {
+    this.weekNumber++;
+    for (Stock stock : this.stocks.values()) {
+      double change = 0.9 + random.nextDouble() * 0.2;
+      stock.addNewSalesPrice(
+          stock
+              .getSalesPrice()
+              .multiply(BigDecimal.valueOf(change))
+              .setScale(2, RoundingMode.HALF_UP));
+      // RoundingMode from AI suggestion
+    }
+  }
+}

src/main/java/millions/Player.java

@@ -0,0 +1,43 @@
+package millions;
+
+import java.math.BigDecimal;
+
+public class Player {
+  private String name;
+  private BigDecimal startingMoney;
+  private BigDecimal money;
+  private Portfolio portfolio;
+  private TransactionArchive transactionArchive;
+
+  public Player(String name, BigDecimal startingMoney) {
+    this.name = name;
+    this.startingMoney = startingMoney;
+    this.money = startingMoney;
+    this.portfolio = new Portfolio();
+    this.transactionArchive = new TransactionArchive();
+  }
+
+  public void addMoney(BigDecimal amount) {
+    this.money = this.money.add(amount);
+  }
+
+  public void withdrawMoney(BigDecimal amount) {
+    this.money = this.money.subtract(amount);
+  }
+
+  public String getName() {
+    return this.name;
+  }
+
+  public BigDecimal getMoney() {
+    return this.money;
+  }
+
+  public Portfolio getPortfolio() {
+    return this.portfolio;
+  }
+
+  public TransactionArchive getTransactionArchive() {
+    return this.transactionArchive;
+  }
+}

src/main/java/temppackage/Portfolio.java → src/main/java/millions/Portfolio.java

@@ -1,22 +1,33 @@
-package temppackage;
+package millions;
 
 import java.util.ArrayList;
 import java.util.List;
 
 public class Portfolio {
   List<Share> shares;
+
   public Portfolio() {
     shares = new ArrayList<>();
   }
+
   public boolean addShare(Share share) {
     return this.shares.add(share);
   }
+
   public boolean removeShare(Share share) {
     return this.shares.remove(share);
   }
+
   public List<Share> getShares() {
     return this.shares;
   }
+
+  public List<Share> getShares(String symbol) {
+    return this.shares.stream()
+        .filter(share -> share.getStock().getSymbol().equals(symbol))
+        .toList();
+  }
+
   public boolean contains(Share share) {
     return this.shares.contains(share);
   }

src/main/java/millions/Purchase.java

@@ -0,0 +1,25 @@
+package millions;
+
+import millions.calculators.PurchaseCalculator;
+
+public class Purchase extends Transaction {
+
+  public Purchase(Share share, int week) {
+    super(share, week, new PurchaseCalculator(share));
+  }
+
+  @Override
+  public void commit(Player player) {
+    if (isCommitted()) {
+      throw new IllegalStateException("Already committed");
+    }
+
+    if (player.getMoney().compareTo(getCalculator().calculateTotal()) < 0) {
+      throw new IllegalStateException("Not enought money");
+    }
+    player.withdrawMoney(getCalculator().calculateTotal());
+    player.getPortfolio().addShare(getShare());
+    player.getTransactionArchive().add(this);
+    setCommitted(true);
+  }
+}

src/main/java/millions/Sale.java

@@ -0,0 +1,25 @@
+package millions;
+
+import millions.calculators.SaleCalculator;
+
+public class Sale extends Transaction {
+
+  public Sale(Share share, int week) {
+    super(share, week, new SaleCalculator(share));
+  }
+
+  @Override
+  public void commit(Player player) {
+    if (isCommitted()) {
+      throw new IllegalStateException("Already committed");
+    }
+
+    if (!player.getPortfolio().contains(getShare())) {
+      throw new IllegalStateException("Does not own the share");
+    }
+    player.addMoney(getCalculator().calculateTotal());
+    player.getPortfolio().removeShare(getShare());
+    player.getTransactionArchive().add(this);
+    setCommitted(true);
+  }
+}

src/main/java/temppackage/Share.java → src/main/java/millions/Share.java

@@ -1,4 +1,4 @@
-package temppackage;
+package millions;
 
 import java.math.BigDecimal;
 
@@ -12,12 +12,15 @@ public Share(Stock stock, BigDecimal quantity, BigDecimal purchasePrice) {
     this.quantity = quantity;
     this.purchasePrice = purchasePrice;
   }
+
   public Stock getStock() {
     return this.stock;
   }
+
   public BigDecimal getQuantity() {
     return this.quantity;
   }
+
   public BigDecimal getPurchasePrice() {
     return this.purchasePrice;
   }

src/main/java/temppackage/Stock.java → src/main/java/millions/Stock.java

@@ -1,4 +1,4 @@
-package temppackage;
+package millions;
 
 import java.math.BigDecimal;
 import java.util.List;
@@ -7,20 +7,25 @@ public class Stock {
   String symbol;
   String company;
   List<BigDecimal> prices;
-  public Stock(String symbol, String company, List<BigDecimal> prices){
+
+  public Stock(String symbol, String company, List<BigDecimal> prices) {
     this.symbol = symbol;
     this.company = company;
     this.prices = prices;
   }
+
   public String getSymbol() {
     return this.symbol;
   }
+
   public String getCompany() {
     return this.company;
   }
-  public BigDecimal getPrice() {
+
+  public BigDecimal getSalesPrice() {
     return this.prices.getLast();
   }
+
   public void addNewSalesPrice(BigDecimal price) {
     this.prices.add(price);
   }

src/main/java/millions/Transaction.java

@@ -0,0 +1,40 @@
+package millions;
+
+import millions.calculators.TransactionCalculator;
+
+public abstract class Transaction {
+
+  private Share share;
+  private int week;
+  private TransactionCalculator transactionCalculator;
+  private boolean committed;
+
+  protected Transaction(Share share, int week, TransactionCalculator transactionCalculator) {
+    this.share = share;
+    this.week = week;
+    this.transactionCalculator = transactionCalculator;
+    this.committed = false;
+  }
+
+  public Share getShare() {
+    return this.share;
+  }
+
+  public int getWeek() {
+    return this.week;
+  }
+
+  public TransactionCalculator getCalculator() {
+    return this.transactionCalculator;
+  }
+
+  public boolean isCommitted() {
+    return this.committed;
+  }
+
+  protected void setCommitted(boolean committed) {
+    this.committed = committed;
+  }
+
+  public abstract void commit(Player player);
+}

src/main/java/millions/TransactionArchive.java

@@ -0,0 +1,48 @@
+package millions;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class TransactionArchive {
+
+  List<Transaction> transactions;
+
+  public TransactionArchive() {
+    this.transactions = new ArrayList<>();
+  }
+
+  public boolean add(Transaction transaction) {
+    if (transactions.contains(transaction)) {
+      return false;
+    }
+    this.transactions.add(transaction);
+    return true;
+  }
+
+  public boolean isEmpty() {
+    return transactions.isEmpty();
+  }
+
+  public List<Transaction> getTransactions(int week) {
+    return transactions.stream().filter(x -> x.getWeek() == week).collect(Collectors.toList());
+  }
+
+  public List<Purchase> getPurchases(int week) {
+    return transactions.stream()
+        .filter(t -> t.getWeek() == week && t instanceof Purchase)
+        .map(t -> (Purchase) t)
+        .collect(Collectors.toList());
+  }
+
+  public List<Sale> getSales(int week) {
+    return transactions.stream()
+        .filter(t -> t.getWeek() == week && t instanceof Sale)
+        .map(t -> (Sale) t)
+        .collect(Collectors.toList());
+  }
+
+  public int countDistinctWeeks() {
+    return (int) transactions.stream().map(Transaction::getWeek).distinct().count();
+  }
+}