challenges/Week9.java

import java.awt.event.*;

import java.util.ArrayList;
import java.util.Scanner;

import javax.swing.JOptionPane;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

public class Week9 {
    private static ArrayList<Task> tasks;
    private static String filepath;
    private static Week9Gui gui;

    // NOTE: For sorts, the Task class needs something implemented.
    private static void sortByTitle() {
        System.out.println("Sort By Title clicked!");
        // TODO
        gui.update(tasks);
    }

    // NOTE: For sorts, the Task class needs something implemented.
    private static void sortByDueDate() {
        System.out.println("Sort By Due Date clicked!");
        // TODO
        gui.update(tasks);
    }

    // NOTE: For sorts, the Task class needs something implemented.
    private static void filterByComplete() {
        System.out.println("Filter By Complete clicked!");
        // TODO
        gui.update(tasks);
    }
    
    //addBtn Method
    private static void addBtn() {
    	String[] strs = new String[3];
    		strs[0] = JOptionPane.showInputDialog("Please Enter A Title:");
    		strs[1] = JOptionPane.showInputDialog("Please Enter A Discription:");
    		strs[2] = JOptionPane.showInputDialog("Please Enter A Due Date:");

    		
    }

    private void parse(File f) throws IOException {
        // TODO: Need to open the file and get each line.
        // TODO: Parse the format ("TITLE, DESCRIPTION, DUE DATE, COMPLETED"), 
        // TODO: Create a new Task object and add it to the ArrayList.
    	
    }

    // Writes each task to the file after a change.
    private static void saveTasks() {
        System.out.println("writing tasks to " + filepath);
        // TODO: Write each Task stored in the ArrayList to the file.
    }

    ///////////////////////// END OF TODO ////////////////////////////

    // Initialize tasks and GUI, populate with test data (if applicable).
    private void init() {
        filepath = getNotesDirectoryPath();
        initTasks();
        testData();
    }

    // Identify the operating system of the user, and obtain the path to the "tasks" directory.
    private String getNotesDirectoryPath() {
        String os = System.getProperty("os.name").toLowerCase();

        String userHome = System.getProperty("user.home");
        String tasksDir = "tasks";

        if (os.contains("win")) // Windows
            return userHome + "\\" + tasksDir;
        else if (os.contains("mac")) // MacOS
            return userHome + "/Library/Application Support/" + tasksDir;
        else // Linux/other
            return userHome + "/" + tasksDir;
    }

    // Create the tasks file if it does not already exist. Load tasks from the existing file otherwise.
    private void initTasks() {
        File f = new File(filepath);
        tasks = new ArrayList<Task>();

        if(f.isFile()) { 
            System.out.println("loading tasks from " + filepath);
            try {
				parse(f);
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
        } else {
            try {
                f.createNewFile();
                System.out.println(filepath + " has been created.");
            } catch(Exception e) {
                System.out.println(e);
            }
        }
    }

    // Test tasks, not read from a file and are not intended to be saved to a file.
    private void testData() {
        for(int i = 0; i < 10; i++)
            tasks.add(new Task("Title " + i, "Description " + i, "Due Date " + i));
    }

    public static void main(String[] args) {
        new Week9().init();
        ActionListener sortByTitle = new ActionListener() {
            public void actionPerformed(ActionEvent e) { 
                sortByTitle();
            }
        };

        ActionListener sortByDueDate = new ActionListener() {
            public void actionPerformed(ActionEvent e) { 
                sortByDueDate();
            }
        };

        ActionListener filterByCompleted = new ActionListener() {
            public void actionPerformed(ActionEvent e) { 
                filterByComplete();
            }
        };
        
        ActionListener addBtn = new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				addBtn();
			}
		}; 

        gui = new Week9Gui(tasks, sortByTitle, sortByDueDate, filterByCompleted, addBtn);
    }

}