Letter.java

package carpool.model;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import carpool.common.DateUtility;
import carpool.common.HelperOperator;
import carpool.common.Validator;
import carpool.configurations.CarpoolConfig;
import carpool.configurations.EnumConfig.*;
import carpool.exception.validation.ValidationException;
import carpool.factory.JSONFactory;
import carpool.interfaces.PseudoModel;
import carpool.interfaces.PseudoValidatable;
import carpool.model.representation.SearchRepresentation;



/**
 *  Letter specifictions
 * 1. Create, user send another a letter
 * 2. get all letters(not in frontend api) (get All)
 * 
 * 3. get all letter history given current user and another user, if another user not specified, get all from currentUser , optionally direction(get by userId, optionally intersect targetUserId, optionally interset with direction)
 * 
 * 4. get a single letter detail by its letter Id;  (get by letterId)
 * 5. check the letter
 * 6. delete the letter from history (optional for Alpha-Trinity)
 * */

public class Letter implements PseudoModel, PseudoValidatable, Comparable<Letter>{

	private int letterId;
	private int from_userId;
	private int to_userId;
	private int owner_userId;
	private LetterType type;

	private User from_user;
	private User to_user;

	private String content;
	private Calendar send_time;
	private Calendar check_time;

	private LetterState state;
	private boolean historyDeleted;


	/*****
	 * protected constructor to disallow raw initialization and serialization, but allow easier testing
	 *****/
	protected Letter(){}


	/*****
	 * Constructor for letter sending
	 *****/
	public Letter(int from_userId, int to_userId, LetterType type, String content) {
		super();
		this.letterId = -1;
		this.from_userId = from_userId;
		this.to_userId = to_userId;
		this.type = type;

		this.from_user = null;
		this.to_user = null;

		this.content = content;
		this.send_time = DateUtility.getCurTimeInstance();
		this.check_time = DateUtility.getCurTimeInstance();

		this.state = LetterState.unread;
		this.historyDeleted = false;

	}

	public Letter(int letterId, int from_userId, int to_userId,
			LetterType type, User from_user, User to_user, String content,
			Calendar send_time, Calendar check_time, LetterState state,
			boolean historyDeleted) {
		super();
		this.letterId = letterId;
		this.from_userId = from_userId;
		this.to_userId = to_userId;
		this.type = type;
		this.from_user = from_user;
		this.to_user = to_user;
		this.content = content;
		this.send_time = send_time;
		this.check_time = check_time;
		this.state = state;
		this.historyDeleted = historyDeleted;
	}

	public Letter(int letterId, int from_userId, int to_userId,
			LetterType type, User from_user, User to_user, String content,
			Calendar send_time, Calendar check_time, LetterState state,
			boolean historyDeleted,int ownerId) {
		super();
		this.letterId = letterId;
		this.from_userId = from_userId;
		this.to_userId = to_userId;
		this.type = type;
		this.from_user = from_user;
		this.to_user = to_user;
		this.content = content;
		this.send_time = send_time;
		this.check_time = check_time;
		this.state = state;
		this.historyDeleted = historyDeleted;
		this.owner_userId = ownerId;
	}


	public int getLetterId() {
		return letterId;
	}


	public void setLetterId(int letterId) {
		this.letterId = letterId;
	}


	public int getFrom_userId() {
		return from_userId;
	}


	public void setFrom_userId(int from_userId) {
		this.from_userId = from_userId;
	}


	public int getTo_userId() {
		return to_userId;
	}


	public void setTo_userId(int to_userId) {
		this.to_userId = to_userId;
	}


	public LetterType getType() {
		return type;
	}


	public void setType(LetterType type) {
		this.type = type;
	}


	public User getFrom_user() {
		return from_user;
	}


	public void setFrom_user(User from_user) {
		this.from_user = from_user;
	}


	public User getTo_user() {
		return to_user;
	}


	public void setTo_user(User to_user) {
		this.to_user = to_user;
	}


	public String getContent() {
		return content;
	}


	public void setContent(String content) {
		this.content = content;
	}


	public Calendar getSend_time() {
		return send_time;
	}


	public void setSend_time(Calendar send_time) {
		this.send_time = send_time;
	}


	public Calendar getCheck_time() {
		return check_time;
	}


	public void setCheck_time(Calendar check_time) {
		this.check_time = check_time;
	}


	public LetterState getState() {
		return state;
	}


	public void setState(LetterState state) {
		this.state = state;
	}


	public boolean isHistoryDeleted() {
		return historyDeleted;
	}


	public void setHistoryDeleted(boolean historyDeleted) {
		this.historyDeleted = historyDeleted;
	}

	public void setOwner_id(int userId){
		this.owner_userId = userId;
	}

	public int getOwnder_id(){
		return this.owner_userId;
	}

	@Override
	public JSONObject toJSON(){
		JSONObject jsonUser = new JSONObject();
		try {
			jsonUser.put("letterId", this.getLetterId());
			jsonUser.put("from_userId", this.getFrom_userId());
			jsonUser.put("owner_userId", this.getOwnder_id());
			jsonUser.put("to_userId", this.getTo_userId());
			jsonUser.put("type", this.getType().code);
			jsonUser.put("from_user", this.getFrom_user() == null ? new JSONObject() : this.getFrom_user().toJSON());
			jsonUser.put("to_user", this.getTo_user() == null ? new JSONObject() : this.getTo_user().toJSON());
			jsonUser.put("content", this.getContent());
			jsonUser.put("send_time", DateUtility.castToAPIFormat(this.getSend_time()));
			jsonUser.put("check_time", DateUtility.castToAPIFormat(this.getCheck_time()));
			jsonUser.put("state", this.getState().code);
			jsonUser.put("historyDeleted", this.isHistoryDeleted());

		} catch (JSONException e) {
			e.printStackTrace();
		}

		return jsonUser;
	}


	public boolean equals(Letter anotherLetter) {
		try {
			if(this.from_user==null&&this.to_user!=null){
				return this.letterId == anotherLetter.letterId && this.from_userId == anotherLetter.from_userId && this.to_userId == anotherLetter.to_userId && this.owner_userId == anotherLetter.getOwnder_id() &&
						this.type == anotherLetter.type && anotherLetter.from_user==null &&this.to_user.equals(anotherLetter.to_user) && 
						this.content.equals(anotherLetter.content) && this.state == anotherLetter.state && this.historyDeleted == anotherLetter.historyDeleted &&
						this.send_time.getTime().toString().equals(anotherLetter.send_time.getTime().toString()) &&
						this.check_time.getTime().toString().equals(anotherLetter.check_time.getTime().toString()); 
			}else if(this.from_user!=null&&this.to_user!=null){
				return this.letterId == anotherLetter.letterId && this.from_userId == anotherLetter.from_userId && this.to_userId == anotherLetter.to_userId && this.owner_userId == anotherLetter.getOwnder_id() &&
						this.type == anotherLetter.type &&this.from_user.equals(anotherLetter.from_user) && this.to_user.equals(anotherLetter.to_user) && 
						this.content.equals(anotherLetter.content) && this.state == anotherLetter.state && this.historyDeleted == anotherLetter.historyDeleted &&
						this.send_time.getTime().toString().equals(anotherLetter.send_time.getTime().toString()) &&
						this.check_time.getTime().toString().equals(anotherLetter.check_time.getTime().toString());
			}else if(this.from_user!=null&&this.to_user==null){
				return this.letterId == anotherLetter.letterId && this.from_userId == anotherLetter.from_userId && this.to_userId == anotherLetter.to_userId && this.owner_userId == anotherLetter.getOwnder_id() &&
						this.type == anotherLetter.type && this.from_user.equals(anotherLetter.from_user) && anotherLetter.to_user==null&& 
						this.content.equals(anotherLetter.content) && this.state == anotherLetter.state && this.historyDeleted == anotherLetter.historyDeleted &&
						this.send_time.getTime().toString().equals(anotherLetter.send_time.getTime().toString()) &&
						this.check_time.getTime().toString().equals(anotherLetter.check_time.getTime().toString());
			}else{
				return false;
			}

		} catch (ValidationException e) {
			return false;
		}
	} 



	@Override
	public int compareTo(Letter anotherLetter) {
		return this.getSend_time().compareTo(anotherLetter.getSend_time());
	}


	@Override
	public boolean validate() throws ValidationException{
		// TODO 


		return true;
	}

}