[W8.6b][F11-B2]Lim Hong Cho

src/seedu/addressbook/Main.java

@@ -72,8 +72,9 @@ private void start(String[] launchArgs) {
         }
     }
 
-    /** Prints the Goodbye message and exits. */
+    /** Prints the Tags changes and Goodbye message and exits. */
     private void exit() {
+        addressBook.showTagChanges();
         ui.showGoodbyeMessage();
         System.exit(0);
     }

src/seedu/addressbook/data/AddressBook.java

@@ -12,6 +12,7 @@
 import seedu.addressbook.data.person.UniquePersonList.PersonNotFoundException;
 import seedu.addressbook.data.tag.Tag;
 import seedu.addressbook.data.tag.UniqueTagList;
+import seedu.addressbook.ui.TextUi;
 
 /**
  * Represents the entire address book. Contains the data of the address book.
@@ -24,13 +25,17 @@ public class AddressBook {
 
     private final UniquePersonList allPersons;
     private final UniqueTagList allTags; // can contain tags not attached to any person
+    private Tagging tagging;
+    private TextUi ui;
 
     /**
      * Creates an empty address book.
      */
     public AddressBook() {
         allPersons = new UniquePersonList();
         allTags = new UniqueTagList();
+        tagging = new Tagging();
+        ui = new TextUi();
     }
 
     /**
@@ -121,6 +126,12 @@ public UniqueTagList getAllTags() {
         return new UniqueTagList(allTags);
     }
 
+    public void showTagChanges(){
+        for(String changes : tagging.getTaggingChanges()){
+            ui.showToUser(changes);
+        }
+    }
+
     @Override
     public boolean equals(Object other) {
         return other == this // short circuit if same object

src/seedu/addressbook/data/Tagging.java

@@ -0,0 +1,26 @@
+package seedu.addressbook.data;
+
+import seedu.addressbook.data.person.Person;
+import seedu.addressbook.data.tag.Tag;
+
+import java.util.ArrayList;
+
+public class Tagging {
+
+    private static ArrayList<String> tagsChanges = new ArrayList<String>();
+
+    private final String ADDITION_SYMBOL = "+";
+    private final String DELETION_SYMBOL = "-";
+
+    public void addTags(Person person, Tag tag){
+        tagsChanges.add("ADDITION_SYMBOL" + " " + person.getName() + tag.tagName);
+    }
+
+    public void deleteTags(Person person, Tag tag){
+        tagsChanges.add("DELETION_SYMBOL" + " " + person.getName() + tag.tagName);
+    }
+
+    public ArrayList<String> getTaggingChanges() {
+        return tagsChanges;
+    }
+}