[T4A2][T1-04]Dao Han

src/seedu/addressbook/data/tag/Tagging.java

@@ -0,0 +1,35 @@
+package seedu.addressbook.data.tag;
+
+import java.util.ArrayList;
+
+import seedu.addressbook.data.person.Person;
+
+/** Association class to support the following functionality:
+ * When the AddressBook program exits, it should print out a list of all the tags added/deleted during that session.
+ */
+
+public class Tagging {
+	private ArrayList<String> allTheTags = new ArrayList<>();
+	private final String ADD_COMMAND = "add";
+	private final String DELETE_COMMAND = "remove";
+
+	// Record tags added/deleted during that session.
+	public void trackTagging(String command, Person person, Tag tag) {
+		if (command == ADD_COMMAND) {
+			allTheTags.add("+ " + person.getName().toString() + " " + tag.toString());
+		}
+		else if (command == DELETE_COMMAND) {
+			allTheTags.add("- " + person.getName().toString() + " " + tag.toString());
+		}
+	}
+
+	// To print out a list of all the tags added/deleted during the session, when the AddressBook program exits.
+	public String getAllTags(){
+		StringBuilder allActions = new StringBuilder();
+		for(String tag: allTheTags){
+			allActions.append(tag + "\n");
+		}
+		return allActions.toString();
+	}
+
+}