[W8.6b][W09-B2] Kevin Chin

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

@@ -0,0 +1,68 @@
+package seedu.addressbook.data.tag;
+
+import java.util.Objects;
+
+import seedu.addressbook.data.person.Person;
+
+    /**
+     * Represents the adding or deleting of a tag for a specific person that happened during a session
+     */
+    public class Tagging {
+
+        private static final String ADD_TAGGING = "+";
+        private static final String DELETE_TAGGING = "-";
+
+        public enum ActionType {
+            ADD, DELETE;
+        }
+
+        private Person person;
+        private Tag tag;
+        private ActionType actionType;
+
+        public Tagging(Person person, Tag tag, ActionType actionType) {
+            this.person = person;
+            this.tag = tag;
+            this.actionType = actionType;
+        }
+
+        public Person getPerson() {
+            return person;
+        }
+
+        public Tag getTag() {
+            return tag;
+        }
+
+        public ActionType getActionType() {
+            return actionType;
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            return obj == this // short circuit if same object
+                    || obj instanceof Tagging // instanceof handles null
+                    && ((Tagging) obj).getPerson().equals(this.person)
+                    && ((Tagging) obj).getTag().equals(this.tag)
+                    && ((Tagging) obj).getActionType().equals(this.getActionType());
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(person, tag, actionType);
+        }
+
+        @Override
+        public String toString() {
+            String actionType;
+
+            if (this.actionType == ActionType.ADD){
+                actionType = ADD_TAGGING;
+            }else{
+                actionType = DELETE_TAGGING;
+            }
+
+            return actionType + " " + person.getName() + " [" + tag + "]";
+        }
+    }
+