import java.io.*;

public class Planner implements Database
{
	private Task [] todo;
	private int numtasks;

	private static final int MAXSIZE = 1000;
	
	public Planner()
	{
		todo = new Task[STARTSIZE];
		numtasks = 0;
	}

	public int size()
	{
		return numtasks;
	}

	public boolean add(Object o)
	{
		if (! (o instanceof Task))
			return false;

		if (numtasks == todo.length && numtasks < MAXSIZE) // make bigger
			{
				int newsize = numtasks * 2;
				if (newsize > MAXSIZE)
					newsize = MAXSIZE;
				Task[] temp = new Task[newsize];
				for (int i=0; i < numtasks; i++)
					temp[i] = todo[i];
				todo = temp;
			}

		try {
			todo[numtasks++] = (Task) o;
			return true;
		}
		catch (ArrayIndexOutOfBoundsException iout)
		{	
			System.err.print(iout + " in add attempt");
			System.err.println("Sorry, no more room in planner");
			numtasks--;
		}
		return false;			
	}

	public void display()
	{
		for (int i=0; i < numtasks; i++)
			System.out.println(todo[i]);	
	}

	public Object find(Object o)
	{
		boolean found = false;
		String s;
		if (! (o instanceof String))
			return null;
		else
			s = (String) o;

		for (int i=0; i < numtasks; i++)
		{	if (todo[i].toString().indexOf(s) >= 0)
			{	return todo[i];
			}
		}
		return null;
	}

	// method not implemented
	public boolean delete(Object o)
	{
		return false;
	}

}