<commit_before>package edu.dynamic.dynamiz.controller;

import edu.dynamic.dynamiz.structure.*;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.joda.time.DateTime;

import edu.dynamic.dynamiz.structure.TaskItem;



/**
 * FileHandler is a class that reads/writes task list to/from the
 * specified file or "todo.txt".
 * This class is meant to be used in the same way as Java Math class: no object instance is required.
 * 
 * Public Methods:
 * static ArrayList<ToDoItem> getListFromFile(String filename)	Gets a list of ToDoItem from the specified filename
 * static void writeListToFile(String[] list, String filename)	//Writes the given list of strings to file.
 * 
 * Private Methods:
 * static EventItem makeEventItem(String data)	Creates an EventItem from the data read from file.
 * static TaskItem makeTaskItem(String data)	Creates a TaskItem from the data read from file.
 * static ToDoItem makeToDoItem(String data)	Creates a ToDoItem form the data read from file.
 * 
 * @author A0110781N
 */
public class DataFileReadWrite {
    /*
     * Defines regular expression format for each TaskItem object
     * represented on each line.
     */
    private static final String FORMAT_DATE = "[0-9]{1,2}/[0-9]{1,2}/[0-9]{1,4} " +
	    					"(([0-9]{1,2}:[0-9]{2})||(--:--))";
    private static final String FORMAT_EVENTITEM = ".+; [0-9]+; .+; "+FORMAT_DATE+"; "+FORMAT_DATE;
    private static final String FORMAT_TASKITEM = ".+; [0-9]+; .+; --/--/---- --:--; "+FORMAT_DATE;
    private static final String FORMAT_TODOITEM = ".+; [0-9]+; .+; --/--/---- --:--; --/--/---- --:--";
    
    //File names for todo list and completed.list
    private static final String FILENAME_COMPLETED = "completed.txt";
    public static final String FILE_DIR = "dynamiz";
    
    //Delimiters for data processing purposes.
    private static final String DATETIME_DELIM = " ";<commit_msg>Removed irrelavant import<commit_after>package edu.dynamic.dynamiz.controller;

import edu.dynamic.dynamiz.structure.*;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.joda.time.DateTime;

import edu.dynamic.dynamiz.structure.TaskItem;



/**
 * FileHandler is a class that reads/writes task list to/from the
 * specified file or "todo.txt".
 * This class is meant to be used in the same way as Java Math class: no object instance is required.
 * 
 * Public Methods:
 * static ArrayList<ToDoItem> getListFromFile(String filename)	Gets a list of ToDoItem from the specified filename
 * static void writeListToFile(String[] list, String filename)	//Writes the given list of strings to file.
 * 
 * Private Methods:
 * static EventItem makeEventItem(String data)	Creates an EventItem from the data read from file.
 * static TaskItem makeTaskItem(String data)	Creates a TaskItem from the data read from file.
 * static ToDoItem makeToDoItem(String data)	Creates a ToDoItem form the data read from file.
 * 
 * @author A0110781N
 */
public class DataFileReadWrite {
    /*
     * Defines regular expression format for each TaskItem object
     * represented on each line.
     */
    private static final String FORMAT_DATE = "[0-9]{1,2}/[0-9]{1,2}/[0-9]{1,4} " +
	    					"(([0-9]{1,2}:[0-9]{2})||(--:--))";
    private static final String FORMAT_EVENTITEM = ".+; [0-9]+; .+; "+FORMAT_DATE+"; "+FORMAT_DATE;
    private static final String FORMAT_TASKITEM = ".+; [0-9]+; .+; --/--/---- --:--; "+FORMAT_DATE;
    private static final String FORMAT_TODOITEM = ".+; [0-9]+; .+; --/--/---- --:--; --/--/---- --:--";
    
    //File names for todo list and completed.list
    private static final String FILENAME_COMPLETED = "completed.txt";
    private static final String FILE_DIR = "dynamiz";
    
    //Delimiters for data processing purposes.
    private static final String DATETIME_DELIM = " ";
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