DataLoader.java

//@author RJ Allen
import java.io.FileReader;
import java.util.ArrayList;
import java.util.UUID;
import java.util.Scanner;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;

public class DataLoader extends DataConstants {

    /**
	 * grabs the projects from the json file
     * @return the project from a json file into a arrayList
     */
    public static ArrayList<Project> GetProjects() {
		ArrayList<Project> project = new ArrayList<Project>();
		
		try {
			
			FileReader reader = new FileReader(PROJECT_FILE_NAME);
			JSONParser parser = new JSONParser();	
			JSONArray projJSON = (JSONArray)new JSONParser().parse(reader);
			
			for(int i=0; i < projJSON.size(); i++) {
				JSONObject projectJSON = (JSONObject)projJSON.get(i);
				UUID id = UUID.fromString((String)projectJSON.get(PROJECT_ID));
				String projectName = (String)projectJSON.get(PROJECT_NAME);
				String projectdes = (String)projectJSON.get(PROJECT_DESCRIPTION);
				String projectAuthor = (String)projectJSON.get(PROJECT_AUTHOR);
				//ArrayList<Task> tasks = ArrayList.fromString((String)projectJSON.get(PROJECT_TASK)); 
				
                // add id when it can
				project.add(new Project(id, projectName, projectdes, projectAuthor));
			}
			
			
			return project;
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		return null;
	}

    /**
	 * grabs the users from the json file
     * @return the users from a json file into a arraylist
     */
    public static ArrayList<User> GetUsers() {
       ArrayList<User> users = new ArrayList<User>();
		
		try {
			FileReader reader = new FileReader(USER_FILE_NAME);
			JSONParser parser = new JSONParser();	
			JSONArray peopleJSON = (JSONArray)new JSONParser().parse(reader);
			
			for(int i=0; i < peopleJSON.size(); i++) {
				JSONObject personJSON = (JSONObject)peopleJSON.get(i);
				UUID id = UUID.fromString((String)personJSON.get(USER_ID));
				String userName = (String)personJSON.get(USER_USER_NAME);
				String firstName = (String)personJSON.get(USER_FIRST_NAME);
				String lastName = (String)personJSON.get(USER_LAST_NAME);
                String password = (String)personJSON.get(USER_PASSWORD);
				String privacy = (String)personJSON.get(USER_PRIVACY);
				int privacyValue = Integer.parseInt(privacy); 
				String email = (String)personJSON.get(USER_EMAIL);
				
                // add id when it can
				users.add(new User(id, userName, password, firstName, lastName, email, privacyValue));
			}
			
			return users;
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		return null;
    }

	/**
	 * grabs the Task from the json file
     * @return the Tasks from a json file into a arraylist
     */
	/*
	 * Note for the future We need to be able
	 *  to give task to projects list and remove taskList
	 * so we can work with any errors
	 */
	public static ArrayList<Task> GetTask() {
		 ArrayList<User> users = new ArrayList<User>();

		ArrayList<Task> tasks = new ArrayList<Task>();
		try {
					FileReader reader = new FileReader(TASK_FILE_NAME);
					JSONParser parser = new JSONParser();	
					JSONArray tkJSON = (JSONArray)new JSONParser().parse(reader);

					for(int i = 0; i < tkJSON.size(); i++) {
						JSONObject taskJSON = (JSONObject)tkJSON.get(i);
						UUID id = UUID.fromString((String)taskJSON.get(TASK_ID));
						String taskName = (String)taskJSON.get(TASK_NAME);
						String taskDes = (String)taskJSON.get(TASK_DESC);
						String taskPrio = (String)taskJSON.get(TASK_PRIO);
						int taskPrioValue = Integer.parseInt(taskPrio);
						//System.out.println(taskPrioValue);
						String taskPrivacy = (String)taskJSON.get(TASK_PRIV);
						int taskPrivacyValue = Integer.parseInt(taskPrivacy);
						String taskCateString = (String)taskJSON.get(TASK_CATE);
						Category taskCategory = Category.valueOf(taskCateString);
						
						JSONArray commentJson = (JSONArray)taskJSON.get(TASK_THREAD);
						//ArrayList<String> taskThread = new ArrayList<String>();
						ArrayList<Comment> comment= new ArrayList<Comment>();
						for(int j = 0; j <  commentJson.size(); j++) {
							JSONObject comJSON = (JSONObject)commentJson.get(j);
							//taskThread.add((String)commentJson.get(j));
							String CommentAuth = (String)comJSON.get(COMMENT_AUTH);
							String CommentText = (String)comJSON.get(COMMENT);
							String ComDate = (String)comJSON.get(COMMENT_DATE);
							comment.add(new Comment(CommentAuth, CommentText, ComDate));
						}
						
						String inProgress = (String)taskJSON.get(TASK_INPROGRESS);
						boolean inProgressBoo = Boolean.parseBoolean(inProgress);
						String color = (String)taskJSON.get(TASK_COLOR);
						
						tasks.add(new Task(id, taskName, taskDes, taskPrioValue, taskCategory, comment, inProgressBoo, taskPrivacyValue, color));
					}


					return tasks;

				}catch (Exception e) {
					e.printStackTrace();
				}
				return null;
	}
}