Day.java

import java.util.*;

/*
 * A day, each day contains a list of tasks
 */
public class Day implements Cloneable {

	private ArrayList<String> tasks;
	private Calendar today;

	public Day(Calendar c) {
		today = Calendar.getInstance();
		today.set(c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
		tasks = new ArrayList<>();
	}

	/*
	 * Setters & Getters
	 */
	public Calendar getToday() {
		today.set(Calendar.HOUR_OF_DAY, 0);
		today.set(Calendar.MINUTE, 0);
		today.set(Calendar.SECOND, 0);
		today.set(Calendar.MILLISECOND, 0);
		return today;
	}

	public int getDay() {
		return today.get(Calendar.DAY_OF_MONTH);
	}

	public void setDay(int day) {
		today.set(Calendar.DAY_OF_MONTH, day);
	}

	public String getMonth() {
		int i = today.get(Calendar.MONTH);
		String s = null;
		switch (i) {
		case 0:
			s = "January";
			break;
		case 1:
			s = "February";
			break;
		case 2:
			s = "March";
			break;
		case 3:
			s = "April";
			break;
		case 4:
			s = "May";
			break;
		case 5:
			s = "June";
			break;
		case 6:
			s = "July";
			break;
		case 7:
			s = "August";
			break;
		case 8:
			s = "September";
			break;
		case 9:
			s = "October";
			break;
		case 10:
			s = "November";
			break;
		case 11:
			s = "December";
			break;
		default:
			s = "invalid month";
		}
		return s;
	}

	public int getMonthInt() {
		return today.get(Calendar.MONTH);
	}

	public void setMonth(int month) {
		today.set(Calendar.MONTH, month);
	}

	public int getYear() {
		return today.get(Calendar.YEAR);
	}

	public void setYear(int year) {
		today.set(Calendar.YEAR, year);
	}

	public Iterator<String> getTasks() {
		return new Iterator<String>() {
			public boolean hasNext() {
				return current < tasks.size();
			}

			public String next() {
				return tasks.get(current++);
			}

			public void remove() {
				throw new UnsupportedOperationException();
			}

			private int current = 0;
		};
	}

	public String getDayOfWeek() {
		int i = today.get(Calendar.DAY_OF_WEEK);
		String s = null;
		switch (i) {
		case 1:
			s = "Sunday";
			break;
		case 2:
			s = "Monday";
			break;
		case 3:
			s = "Tuesday";
			break;
		case 4:
			s = "Wednesday";
			break;
		case 5:
			s = "Thursday";
			break;
		case 6:
			s = "Friday";
			break;
		case 7:
			s = "Saturday";
			break;
		default:
			s = "invalid day of the week";
		}
		return s;
	}

	/*
	 * Add, Remove, Edit from tasks arrayList
	 */
	public void addTask(String aTask) {
		tasks.add(aTask);
	}

	public void removeTask(String taskSelected) {
		tasks.remove(taskSelected);
	}

	public void resetTasks() {
		tasks = new ArrayList<>();
	}

	public void editTask(String old, String updated) {
		// traverse arrayList of tasks and find the one that match the selected task
		// replace old task with updated task
		Iterator<String> iterString = getTasks();
		int index = 0;
		while (iterString.hasNext()) {
			String temp = iterString.next();
			if (temp.equals(old))
				tasks.set(index, updated);
			index++;
		}
	}

	/*
	 * @Override clone() method
	 */
	protected Object clone() throws CloneNotSupportedException {
		Day cloned = (Day) super.clone();
		cloned.tasks = new ArrayList<>();
		Iterator<String> iterString = getTasks();
		while (iterString.hasNext()) {
			String temp = iterString.next();
			cloned.tasks.add(temp);
		}

		cloned.today = Calendar.getInstance();
		cloned.today.set(today.get(Calendar.YEAR), today.get(Calendar.MONTH), today.get(Calendar.DAY_OF_MONTH));
		return cloned;
	}
}