Switch TradingMechanism quantities to int, add yes/no and select prompts

TradingMechanism's q/quantity params move from long/long[] to int/int[]
to match the rest of the domain (Trade.quantity, Option counts, etc.
are already int).

Add InputProcessor.readYesNo and readSelect for upcoming menu commands
that need a confirm prompt or a pick-from-list prompt.

1 files changed, 29 insertions, 0 deletions

diff --git a/ui-console/src/main/java/market/guess/ui/console/io/InputProcessor.java b/ui-console/src/main/java/market/guess/ui/console/io/InputProcessor.java
index 4889c36..fc5422f 100644
--- a/ui-console/src/main/java/market/guess/ui/console/io/InputProcessor.java
+++ b/ui-console/src/main/java/market/guess/ui/console/io/InputProcessor.java
@@ -1,6 +1,8 @@
 package market.guess.ui.console.io;
 
+import java.util.List;
 import java.util.Scanner;
+import java.util.function.Function;
 
 public final class InputProcessor {
   private final Scanner scanner = new Scanner(System.in);
@@ -67,6 +69,33 @@ public final class InputProcessor {
     }
   }
 
+  public boolean readYesNo(String prompt) {
+    while (true) {
+      var raw = readLine("%s [Y/N]: ".formatted(prompt)).toLowerCase();
+
+      switch (raw) {
+        case "y", "yes" -> {
+          return true;
+        }
+        case "n", "no" -> {
+          return false;
+        }
+        default -> IO.println("Please answer y/yes or n/no.");
+      }
+    }
+  }
+
+  public <T> T readSelect(String prompt, List<T> items, Function<T, String> function) {
+
+    for (var i = 0; i < items.size(); i++) {
+      IO.println("   [%d]->> %s".formatted(i + 1, function.apply(items.get(i))));
+    }
+
+    var pick = readInt(prompt, 1, items.size());
+
+    return items.get(pick - 1);
+  }
+
   private String nextLine() {
     return scanner.hasNextLine() ? scanner.nextLine() : null;
   }