[W8.6b][W15-B1] Add Tagging association class

src/seedu/addressbook/Main.java

@@ -55,6 +55,7 @@ private void start(String[] launchArgs) {
             this.ui = new TextUi();
             this.storage = initializeStorage(launchArgs);
             this.addressBook = storage.load();
+            addressBook.init();
             ui.showWelcomeMessage(VERSION, storage.getPath());
 
         } catch (InvalidStorageFilePathException | StorageOperationException e) {
@@ -74,6 +75,7 @@ private void start(String[] launchArgs) {
 
     /** Prints the Goodbye message and exits. */
     private void exit() {
+        ui.showAllTaggings(addressBook.getTaggings());
         ui.showGoodbyeMessage();
         System.exit(0);
     }

src/seedu/addressbook/data/AddressBook.java

@@ -2,6 +2,7 @@
 
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.LinkedList;
 import java.util.Map;
 import java.util.Set;
 
@@ -11,6 +12,7 @@
 import seedu.addressbook.data.person.UniquePersonList.DuplicatePersonException;
 import seedu.addressbook.data.person.UniquePersonList.PersonNotFoundException;
 import seedu.addressbook.data.tag.Tag;
+import seedu.addressbook.data.tag.Tagging;
 import seedu.addressbook.data.tag.UniqueTagList;
 
 /**
@@ -24,6 +26,7 @@ public class AddressBook {
 
     private final UniquePersonList allPersons;
     private final UniqueTagList allTags; // can contain tags not attached to any person
+    private LinkedList<Tagging> taggings;
 
     /**
      * Creates an empty address book.
@@ -33,6 +36,17 @@ public AddressBook() {
         allTags = new UniqueTagList();
     }
 
+    /**
+     * Add the details of an add/remove tag operation to tagging
+     */
+    public void addNewTagging(boolean isAdd, Person person, Tag tag) {
+        taggings.add(new Tagging(isAdd, person, tag));
+    }
+
+    public LinkedList<Tagging> getTaggings() {
+        return taggings;
+    }
+
     /**
      * Constructs an address book with the given data.
      * Also updates the tag list with any missing tags found in any person.
@@ -128,4 +142,11 @@ public boolean equals(Object other) {
                         && this.allPersons.equals(((AddressBook) other).allPersons)
                         && this.allTags.equals(((AddressBook) other).allTags));
     }
+
+    /**
+     * Initiate fields for runtime
+     */
+    public void init() {
+        taggings = new LinkedList<>();
+    }
 }

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

@@ -0,0 +1,29 @@
+package seedu.addressbook.data.tag;
+
+import seedu.addressbook.data.person.Person;
+
+/**
+* Association class that records each activity of adding and removing tag*/
+public class Tagging {
+    Tag tag;
+    Person person;
+    Boolean isAdd;
+
+    public Tagging(Boolean isAdd, Person person, Tag tag) {
+        this.isAdd = isAdd;
+        this.tag = tag;
+        this.person = person;
+    }
+
+    public Tag getTag() {
+        return tag;
+    }
+
+    public boolean isAdd() {
+        return isAdd;
+    }
+
+    public Person getPerson() {
+        return person;
+    }
+}

src/seedu/addressbook/ui/TextUi.java

@@ -9,12 +9,14 @@
 import java.io.InputStream;
 import java.io.PrintStream;
 import java.util.ArrayList;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Optional;
 import java.util.Scanner;
 
 import seedu.addressbook.commands.CommandResult;
 import seedu.addressbook.data.person.ReadOnlyPerson;
+import seedu.addressbook.data.tag.Tagging;
 
 /**
  * Text UI of the application.
@@ -38,6 +40,8 @@ public class TextUi {
 
     /** Format of a comment input line. Comment lines are silently consumed when reading user input. */
     private static final String COMMENT_LINE_FORMAT_REGEX = "#.*";
+    private static final String ADD_TAGGING_BULLET = "+";
+    private static final String REMOVE_TAGGING_BULLET = "-";
 
     private final Scanner in;
     private final PrintStream out;
@@ -169,4 +173,13 @@ private static String getIndexedListItem(int visibleIndex, String listItem) {
         return String.format(MESSAGE_INDEXED_LIST_ITEM, visibleIndex, listItem);
     }
 
+    public void showAllTaggings(LinkedList<Tagging> taggings) {
+        for(Tagging t: taggings) {
+            if(t.isAdd())
+                out.print(ADD_TAGGING_BULLET + " ");
+            else
+                out.print(REMOVE_TAGGING_BULLET + " ");
+            out.println(t.getPerson().getName().toString() + " [" + t.getTag().tagName + " ]");
+        }
+    }
 }