Merge pull request #26 from PureUsagi/feature-DeleteCommand

Command and DeleteCommand Feature

src/main/java/seedu/binbash/ItemList.java

@@ -21,6 +21,14 @@ public void addItem(Item item) {
         itemList.add(item);
     }
 
+    public String deleteItem(int index) {
+        Item tempItem = itemList.remove(index - 1);
+
+        String output = "Got it! I've removed the following item:"
+                + String.format("\t%s", tempItem);
+        return output;
+    }
+
     @Override
     public String toString() {
         return itemList.toString();

src/main/java/seedu/binbash/command/Command.java

@@ -0,0 +1,17 @@
+package seedu.binbash.command;
+
+import java.util.regex.Pattern;
+import seedu.binbash.ItemList;
+
+public abstract class Command {
+    public static final String COMMAND_STRING = "command";
+    public static final Pattern COMMAND_FORMAT =
+            Pattern.compile("(?<command>\\S+)(?<arguments>.*)");
+    protected ItemList itemList;
+
+    protected Command(ItemList itemList) {
+        this.itemList = itemList;
+    }
+
+    public abstract String execute();
+}

src/main/java/seedu/binbash/command/DeleteCommand.java

@@ -0,0 +1,21 @@
+package seedu.binbash.command;
+
+import java.util.regex.Pattern;
+import seedu.binbash.ItemList;
+
+public class DeleteCommand extends Command {
+    public static final String COMMAND_STRING = "delete";
+    public static final Pattern COMMAND_FORMAT =
+            Pattern.compile("delete\\s(?<index>\\d+)");
+    protected int index;
+
+    public DeleteCommand(ItemList itemList, int index) {
+        super(itemList);
+
+        this.index = index;
+    }
+
+    public String execute() {
+        return itemList.deleteItem(index);
+    }
+}