Wire buyShares and menu commands, replace factory interfaces with DI

Implement LocalGuessMarketContext.buyShares/loadEvents via a new
TradingOperation and Loader, backed by in-memory repositories. Replace
the ConsoleInputProviderFactory/ConsoleOutputProviderFactory pattern
with picocontainer-injected providers, and drive the menu from a list
of MenuCommand implementations instead of a hardcoded printout.

8 files changed, 116 insertions, 5 deletions

diff --git a/service/src/main/java/market/guess/service/LocalGuessMarketContext.java b/service/src/main/java/market/guess/service/LocalGuessMarketContext.java
index 67e263f..16ee1b8 100644
--- a/service/src/main/java/market/guess/service/LocalGuessMarketContext.java
+++ b/service/src/main/java/market/guess/service/LocalGuessMarketContext.java
@@ -10,19 +10,33 @@ import market.guess.api.LoadResultDTO;
 import market.guess.api.PurchaseReceiptDTO;
 import market.guess.exception.GuessMarketException;
 import market.guess.service.domain.Event;
+import market.guess.service.infrastructure.provider.Loader;
 import market.guess.service.repository.EventRepository;
+import market.guess.service.repository.UserRepository;
 
 public final class LocalGuessMarketContext implements GuessMarketContext {
   private final EventRepository eventRepository;
+  private final UserRepository userRepository;
 
-  public LocalGuessMarketContext(EventRepository eventRepository) {
+  private final TradingOperation tradingOperation;
+
+  private final Loader provider;
+
+  public LocalGuessMarketContext(
+      Loader provider,
+      EventRepository eventRepository,
+      UserRepository userRepository,
+      TradingOperation tradingOperation) {
     super();
+    this.provider = provider;
     this.eventRepository = eventRepository;
+    this.userRepository = userRepository;
+    this.tradingOperation = tradingOperation;
   }
 
   @Override
   public LoadResultDTO loadEvents(Path path) {
-    throw new UnsupportedOperationException("Unimplemented method 'loadEvents'");
+    return provider.load(path);
   }
 
   @Override
@@ -42,15 +56,19 @@ public final class LocalGuessMarketContext implements GuessMarketContext {
 
   @Override
   public PurchaseReceiptDTO buyShares(
-      String userName, String eventKey, String optionKey, long quantity)
+      String userName, String eventKey, String optionKey, int quantity)
       throws GuessMarketException {
-    throw new UnsupportedOperationException("Unimplemented method 'buyShares'");
+    var event = eventRepository.getEvent(eventKey);
+    var option = event.getOption(optionKey);
+    var user = userRepository.getUser(userName);
+    var trade = tradingOperation.buy(event, user, option, quantity);
+    return new PurchaseReceiptDTO();
   }
 
   @Override
   public EventDetailDTO closeEvent(String userName, String eventKey, String winningOptionKey)
       throws GuessMarketException {
-    throw new UnsupportedOperationException("Unimplemented method 'closeEvent'");
+    throw new UnsupportedOperationException("Unimplemented method 'account'");
   }
 
   @Override
diff --git a/service/src/main/java/market/guess/service/TradingOperation.java b/service/src/main/java/market/guess/service/TradingOperation.java
new file mode 100644
index 0000000..c8153c2
--- /dev/null
+++ b/service/src/main/java/market/guess/service/TradingOperation.java
@@ -0,0 +1,13 @@
+package market.guess.service;
+
+import market.guess.service.domain.Event;
+import market.guess.service.domain.Option;
+import market.guess.service.domain.Settlement;
+import market.guess.service.domain.Trade;
+import market.guess.service.domain.User;
+
+public interface TradingOperation {
+  Trade buy(Event event, User user, Option Option, int quantity);
+
+  Settlement settle(Event event, String winningOption);
+}
diff --git a/service/src/main/java/market/guess/service/TradingOperationImpl.java b/service/src/main/java/market/guess/service/TradingOperationImpl.java
new file mode 100644
index 0000000..f6c9aa1
--- /dev/null
+++ b/service/src/main/java/market/guess/service/TradingOperationImpl.java
@@ -0,0 +1,22 @@
+package market.guess.service;
+
+import market.guess.service.domain.Event;
+import market.guess.service.domain.Option;
+import market.guess.service.domain.Settlement;
+import market.guess.service.domain.Trade;
+import market.guess.service.domain.User;
+
+public final class TradingOperationImpl implements TradingOperation {
+
+  @Override
+  public Trade buy(Event event, User user, Option Option, int quantity) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'buy'");
+  }
+
+  @Override
+  public Settlement settle(Event event, String winningOption) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'settle'");
+  }
+}
diff --git a/service/src/main/java/market/guess/service/domain/Event.java b/service/src/main/java/market/guess/service/domain/Event.java
index 2d7ac39..cef0840 100644
--- a/service/src/main/java/market/guess/service/domain/Event.java
+++ b/service/src/main/java/market/guess/service/domain/Event.java
@@ -165,4 +165,11 @@ public final class Event {
         getOptionsNames(),
         account.getBalance().toPlainString());
   }
+
+  public Option getOption(String optionKey) {
+    return options.stream()
+        .filter(option -> option.getKey().equalsIgnoreCase(optionKey))
+        .findFirst()
+        .orElseThrow(() -> new IllegalArgumentException("No such option."));
+  }
 }
diff --git a/service/src/main/java/market/guess/service/domain/Settlement.java b/service/src/main/java/market/guess/service/domain/Settlement.java
new file mode 100644
index 0000000..cfc61f5
--- /dev/null
+++ b/service/src/main/java/market/guess/service/domain/Settlement.java
@@ -0,0 +1,6 @@
+package market.guess.service.domain;
+
+import java.math.BigDecimal;
+
+public record Settlement(
+    String winningOption, BigDecimal commission, BigDecimal paidOutToHolders) {}
diff --git a/service/src/main/java/market/guess/service/infrastructure/provider/XMLLoader.java b/service/src/main/java/market/guess/service/infrastructure/provider/XMLLoader.java
new file mode 100644
index 0000000..443cd87
--- /dev/null
+++ b/service/src/main/java/market/guess/service/infrastructure/provider/XMLLoader.java
@@ -0,0 +1,13 @@
+package market.guess.service.infrastructure.provider;
+
+import java.nio.file.Path;
+import market.guess.api.LoadResultDTO;
+
+public final class XMLLoader implements Loader {
+
+  @Override
+  public LoadResultDTO load(Path path) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'load'");
+  }
+}
diff --git a/service/src/main/java/market/guess/service/repository/InMemoryEventRepository.java b/service/src/main/java/market/guess/service/repository/InMemoryEventRepository.java
new file mode 100644
index 0000000..dad1055
--- /dev/null
+++ b/service/src/main/java/market/guess/service/repository/InMemoryEventRepository.java
@@ -0,0 +1,19 @@
+package market.guess.service.repository;
+
+import java.util.List;
+import market.guess.service.domain.Event;
+
+public final class InMemoryEventRepository implements EventRepository {
+
+  @Override
+  public Event getEvent(String id) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'getEvent'");
+  }
+
+  @Override
+  public List<Event> getAllEvents() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'getAllEvents'");
+  }
+}
diff --git a/service/src/main/java/market/guess/service/repository/InMemoryUserRepository.java b/service/src/main/java/market/guess/service/repository/InMemoryUserRepository.java
new file mode 100644
index 0000000..e71c94c
--- /dev/null
+++ b/service/src/main/java/market/guess/service/repository/InMemoryUserRepository.java
@@ -0,0 +1,13 @@
+package market.guess.service.repository;
+
+
+import market.guess.service.domain.User;
+
+public final class InMemoryUserRepository implements UserRepository {
+
+  @Override
+  public User getUser(String name) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'getUser'");
+  }
+}