From a048471fe32c11c30d93110c34755032b2940948 Mon Sep 17 00:00:00 2001
From: olimhc <flaringdk@gmail.com>
Date: Thu, 15 Mar 2018 02:51:54 +0800
Subject: [PATCH] Add tagging to capture tagging changes in session

---
 src/seedu/addressbook/Main.java             |  3 ++-
 src/seedu/addressbook/data/AddressBook.java | 11 +++++++++
 src/seedu/addressbook/data/Tagging.java     | 26 +++++++++++++++++++++
 3 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 src/seedu/addressbook/data/Tagging.java

diff --git a/src/seedu/addressbook/Main.java b/src/seedu/addressbook/Main.java
index bc18bed7e..1ace5a992 100644
--- a/src/seedu/addressbook/Main.java
+++ b/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);
     }
diff --git a/src/seedu/addressbook/data/AddressBook.java b/src/seedu/addressbook/data/AddressBook.java
index a99a92f9f..59ff34e16 100644
--- a/src/seedu/addressbook/data/AddressBook.java
+++ b/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.
@@ -24,6 +25,8 @@ 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.
@@ -31,6 +34,8 @@ public class AddressBook {
     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
diff --git a/src/seedu/addressbook/data/Tagging.java b/src/seedu/addressbook/data/Tagging.java
new file mode 100644
index 000000000..554bad77c
--- /dev/null
+++ b/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;
+    }
+}