Parser

src/main/java/seedu/binbash/Parser.java

@@ -1,2 +1,44 @@
-package seedu.binbash;public class Parser {
+package seedu.binbash;
+
+import java.util.regex.Matcher;
+
+import seedu.binbash.command.Command;
+import seedu.binbash.command.DeleteCommand;
+import seedu.binbash.command.ListCommand;
+
+public class Parser {
+    private final ItemList itemList;
+
+    public Parser(ItemList itemList) {
+        this.itemList = itemList;
+    }
+
+    public Command parseCommand(String userInput) {
+        String[] tokens = userInput.trim().split("\\s+", 2);
+        String commandString = tokens[0].toLowerCase();
+        String arguments = tokens.length > 1 ? tokens[1] : "";
+
+        switch (commandString) {
+            case "delete":
+                return parseDeleteCommand(arguments);
+            case "list":
+                return parseListCommand(arguments);
+            default:
+                return null;
+        }
+    }
+
+    private Command parseDeleteCommand(String arguments) {
+        Matcher matcher = DeleteCommand.COMMAND_FORMAT.matcher(arguments);
+        if (matcher.matches()) {
+            int index = Integer.parseInt(matcher.group("index"));
+            return new DeleteCommand(itemList, index);
+        } else {
+            return null;
+        }
+    }
+
+    private Command parseListCommand(String arguments) {
+        return new ListCommand(itemList);
+    }
 }