[W8.6b][W15-A1]Ng Hung Siang

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

@@ -0,0 +1,67 @@
+package seedu.addressbook.data.tag;
+
+import seedu.addressbook.data.person.Person;
+import seedu.addressbook.ui.TextUi;
+
+import java.util.ArrayList;
+
+/**
+ * Represents the association between a person and a tag in the address book.
+ * Is only concerned with modifications of tags, not the initial tags associated with a person on creation.
+ * Class is not implemented by addressbook as tag modification commands are not yet implemented.
+ */
+
+public class Tagging {
+
+    private ArrayList<Person> personList;
+    private ArrayList<Tag> tagList;
+    private ArrayList<String> action;
+    private TextUi ui;
+
+    public Tagging(){
+        personList = new ArrayList<Person>();
+        tagList  = new ArrayList<Tag>();
+        action = new ArrayList<String>();
+        this.ui = new TextUi();
+    }
+
+    /**
+     * Includes the tag modification into the list.
+     * Will be called during execution of tag addition command(not yet implemented).
+     */
+    private void addTag (Person person, Tag tag){
+        personList.add(person);
+        tagList.add(tag);
+        action.add("added");
+    }
+
+    /**
+     * Includes the tag modification into the list.
+     * Will be called during execution of tag deletion command(not yet implemented).
+     */
+    private void removeTag (Person person, Tag tag){
+        personList.add(person);
+        tagList.add(tag);
+        action.add("deleted");
+    }
+
+    /**
+     * Displays history of tag modification during this session.
+     * Will be called when exiting addressbook(not yet implemented).
+     */
+    private void displayModifiedTags(){
+        StringBuilder displayMessage = new StringBuilder();
+        if(personList.size() == 0){
+            displayMessage.append("No tags were modified");
+        }
+        else{
+            for(int i = 0; i < personList.size(); i++){
+                displayMessage.append(personList.get(i).getName());
+                displayMessage.append(action.get(i));
+                displayMessage.append(tagList.get(i).toString());
+                displayMessage.append("\n");
+            }
+        }
+        ui.showToUser(displayMessage.toString().trim());
+    }
+}