Implement in-memory repositories, XML load validation, and menu exit/list commands

- Add generic Repository<T> interface; EventRepository/UserRepository extend it
- Implement InMemoryEventRepository/InMemoryUserRepository backed by ArrayList
- Rename XMLLoader to XMLLoaderV1, add LoadValidator and mapper/v2 package
- Add OrderBookTradingMechanism
- Add User(String, int) convenience constructor
- Add ListEventsMenuCommand and ExitMenuCommand, isExit() on MenuCommand
- Menu now sizes selection range by max command index and exits on isExit()
- LoadFileMenuCommand reports validation issues on failed loads
- Untrack test-data/ and config.properties from .gitignore

6 files changed, 111 insertions, 5 deletions

diff --git a/ui-console/src/main/java/market/guess/ui/console/App.java b/ui-console/src/main/java/market/guess/ui/console/App.java
index 2bff741..34638ac 100644
--- a/ui-console/src/main/java/market/guess/ui/console/App.java
+++ b/ui-console/src/main/java/market/guess/ui/console/App.java
@@ -4,12 +4,15 @@ import market.guess.api.GuessMarketContext;
 import market.guess.service.LocalGuessMarketContext;
 import market.guess.service.TradingOperation;
 import market.guess.service.TradingOperationImpl;
+import market.guess.service.infrastructure.mapper.v1.EventMapperV1;
 import market.guess.service.infrastructure.provider.Loader;
-import market.guess.service.infrastructure.provider.v1.XMLLoader;
+import market.guess.service.infrastructure.provider.v1.XMLLoaderV1;
 import market.guess.service.repository.EventRepository;
 import market.guess.service.repository.InMemoryEventRepository;
 import market.guess.service.repository.InMemoryUserRepository;
 import market.guess.service.repository.UserRepository;
+import market.guess.ui.console.command.ExitMenuCommand;
+import market.guess.ui.console.command.ListEventsMenuCommand;
 import market.guess.ui.console.command.LoadFileMenuCommand;
 import market.guess.ui.console.io.ConsoleInputProvider;
 import market.guess.ui.console.io.ConsoleOutputProvider;
@@ -27,10 +30,13 @@ public class App {
     pico.addComponent(UserRepository.class, InMemoryUserRepository.class);
 
     pico.addComponent(TradingOperation.class, TradingOperationImpl.class);
-    pico.addComponent(Loader.class, XMLLoader.class);
+    pico.addComponent(EventMapperV1.class);
+    pico.addComponent(Loader.class, XMLLoaderV1.class);
     pico.addComponent(GuessMarketContext.class, LocalGuessMarketContext.class);
 
     pico.addComponent(LoadFileMenuCommand.class);
+    pico.addComponent(ListEventsMenuCommand.class);
+    pico.addComponent(ExitMenuCommand.class);
 
     pico.addComponent(InputProvider.class, ConsoleInputProvider.class);
     pico.addComponent(OutputProvider.class, ConsoleOutputProvider.class);
diff --git a/ui-console/src/main/java/market/guess/ui/console/Menu.java b/ui-console/src/main/java/market/guess/ui/console/Menu.java
index 0521e5f..c1762dc 100644
--- a/ui-console/src/main/java/market/guess/ui/console/Menu.java
+++ b/ui-console/src/main/java/market/guess/ui/console/Menu.java
@@ -19,12 +19,12 @@ public final class Menu implements Startable {
 
   @Override
   public void start() {
+    var max = commands.stream().mapToInt(MenuCommand::getIndex).max().orElse(0);
     out.splashScreen();
-
     while (true) {
       printMenu();
 
-      var selection = in.readInt("Choose a command: ", 1, commands.size());
+      var selection = in.readInt("Choose a command: ", 1, max);
       var commandOptional = commands.stream().filter(c -> c.getIndex() == selection).findFirst();
 
       if (commandOptional.isEmpty()) {
@@ -34,6 +34,8 @@ public final class Menu implements Startable {
       var command = commandOptional.get();
 
       command.execute();
+
+      if (command.isExit()) return;
     }
   }
 
@@ -45,7 +47,7 @@ public final class Menu implements Startable {
   private void printMenu() {
     out.newLine();
     for (var command : commands) {
-      out.println("    %d -- %s".formatted(command.getIndex(), command.getName()));
+      out.println("    [%d]->> %s".formatted(command.getIndex(), command.getName()));
     }
   }
 }
diff --git a/ui-console/src/main/java/market/guess/ui/console/command/ExitMenuCommand.java b/ui-console/src/main/java/market/guess/ui/console/command/ExitMenuCommand.java
new file mode 100644
index 0000000..372c686
--- /dev/null
+++ b/ui-console/src/main/java/market/guess/ui/console/command/ExitMenuCommand.java
@@ -0,0 +1,37 @@
+package market.guess.ui.console.command;
+
+import market.guess.ui.console.io.OutputProvider;
+
+public final class ExitMenuCommand implements MenuCommand {
+  private final OutputProvider out;
+
+  public ExitMenuCommand(OutputProvider out) {
+    super();
+    this.out = out;
+  }
+
+  @Override
+  public int getIndex() {
+    return 6;
+  }
+
+  @Override
+  public String getName() {
+    return "Exit";
+  }
+
+  @Override
+  public boolean allowed() {
+    return true;
+  }
+
+  @Override
+  public boolean isExit() {
+    return true;
+  }
+
+  @Override
+  public void execute() {
+    out.println("Goodbye.");
+  }
+}
diff --git a/ui-console/src/main/java/market/guess/ui/console/command/ListEventsMenuCommand.java b/ui-console/src/main/java/market/guess/ui/console/command/ListEventsMenuCommand.java
new file mode 100644
index 0000000..6e6ace9
--- /dev/null
+++ b/ui-console/src/main/java/market/guess/ui/console/command/ListEventsMenuCommand.java
@@ -0,0 +1,51 @@
+package market.guess.ui.console.command;
+
+import market.guess.api.CommissionTiming;
+import market.guess.api.GuessMarketContext;
+import market.guess.ui.console.io.OutputProvider;
+
+public final class ListEventsMenuCommand implements MenuCommand {
+  private final GuessMarketContext context;
+  private final OutputProvider out;
+
+  public ListEventsMenuCommand(GuessMarketContext context, OutputProvider out) {
+    super();
+    this.context = context;
+    this.out = out;
+  }
+
+  @Override
+  public int getIndex() {
+    return 2;
+  }
+
+  @Override
+  public String getName() {
+    return "List events";
+  }
+
+  @Override
+  public boolean allowed() {
+    return !context.listEvents().isEmpty();
+  }
+
+  @Override
+  public void execute() {
+    var events = context.listEvents();
+
+    for (var event : events) {
+      out.newLine();
+      out.println("    %s".formatted(event.name()));
+      out.println("        %s".formatted(event.description()));
+      out.println(
+          "        Commission: %d%% (%s)"
+              .formatted(event.commissionPercent(), timing(event.commissionTiming())));
+      out.println("        Options:    " + String.join(" | ", event.optionNames()));
+      out.println("        Status:     " + event.status());
+    }
+  }
+
+  private static String timing(CommissionTiming timing) {
+    return timing == CommissionTiming.ON_CLOSE ? "charged on close" : "charged on purchase";
+  }
+}
diff --git a/ui-console/src/main/java/market/guess/ui/console/command/LoadFileMenuCommand.java b/ui-console/src/main/java/market/guess/ui/console/command/LoadFileMenuCommand.java
index 5a91fe0..4a56483 100644
--- a/ui-console/src/main/java/market/guess/ui/console/command/LoadFileMenuCommand.java
+++ b/ui-console/src/main/java/market/guess/ui/console/command/LoadFileMenuCommand.java
@@ -40,5 +40,11 @@ public final class LoadFileMenuCommand implements MenuCommand {
       out.println("Loaded %d event(s) from %s.".formatted(result.eventsLoaded(), result.source()));
       return;
     }
+
+    out.println(
+        "The file was not loaded. %d problem(s) were found: ".formatted(result.issues().size()));
+    for (var issue : result.issues()) {
+      out.println("    - %s: %s".formatted(issue.location(), issue.humanizedMessage()));
+    }
   }
 }
diff --git a/ui-console/src/main/java/market/guess/ui/console/command/MenuCommand.java b/ui-console/src/main/java/market/guess/ui/console/command/MenuCommand.java
index 8a28dfe..50acdac 100644
--- a/ui-console/src/main/java/market/guess/ui/console/command/MenuCommand.java
+++ b/ui-console/src/main/java/market/guess/ui/console/command/MenuCommand.java
@@ -8,4 +8,8 @@ public interface MenuCommand {
   boolean allowed();
 
   void execute();
+
+  default boolean isExit() {
+    return false;
+  }
 }