/*
KeyringEditor

Copyright 2004 Markus Griessnig
Vienna University of Technology
Institute of Computer Technology

KeyringEditor is based on:
Java Keyring v0.6
Copyright 2004 Frank Taylor <keyring@lieder.me.uk>

These programs are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
*/

// Entry.java

// 29.10.2004

// 02.11.2004: add variables attribute, uniqueId & recordLength
// 06.11.2004: removed entryId from crypto.decrypt(); added getDate()
// 17.11.2004: added getAll()
// 23.11.2004: toString changed
// 24.11.2004: added setTitleSeparator()
// 01.12.2004: added iv (Keyring database format 5)
// 07.12.2004: using lastIndexOf for toString
// 23.09.2005: added getUniqueId()

// Keyring fields: title, category, account, password, notes, date

/**
 * This class is used to save and manipulate entries.
 */
public class Entry implements Comparable {
	// ----------------------------------------------------------------
	// variables
	// ----------------------------------------------------------------

	/**
	 * Separates levels in an entry title for the tree view
	 */
	private static char SEPARATOR = '/'; // default

	/**
	 * Entry Id
	 */
	protected int entryId;

	/**
	 * Entry Title
	 */
	protected String title;

	/**
	 * Index of category-name
	 */
	protected int category;

	/**
	 * Encrypted data: account, password, notes, date
	 */
	protected byte[] encrypted;

	/**
	 * IV-Vector of encrypted data
	 */
	protected byte[] iv;

	/**
	 * Contains Index of category-name and information about if record is hidden
	 */
	protected int attribute;

	/**
	 * Used by keyring database
	 */
	protected int uniqueId;

	/**
	 * Length of entry record in keyring database
	 */
	protected int recordLength;

	/**
	 * Reference to class Crypto
	 */
	private Crypto crypto; // reference

	// ----------------------------------------------------------------
	// constructor
	// ----------------------------------------------------------------
	/**
	 * Default constructor.
	 */
	public Entry(int entryId, String title, int category, byte[] encrypted, Crypto crypto,
		int attribute, int uniqueId, int recordLength, byte[] iv) {
		this.entryId = entryId;
		this.title = title;
		this.category = category;
		this.encrypted = encrypted;
		this.crypto = crypto;
		this.attribute = attribute;
		this.uniqueId = uniqueId;
		this.recordLength = recordLength;
		this.iv = iv; // null if Keyring database format 4
	}

	// ----------------------------------------------------------------
	// public ---------------------------------------------------------
	// ----------------------------------------------------------------

	/**
	 * This method returns the unique id.
	 *
	 * @return Unique id
	 */
	public int getUniqueId() {
		return uniqueId;
	}

	/**
	 * This method sets the variable SEPARATOR.
	 *
	 * @param sep Entry title separator (Default: '/')
	 */
	public void setTitleSeparator(char sep) {
		SEPARATOR = sep;
	}

	// uncrypted fields

	/**
	 * This method returns the entry id.
	 *
	 * @return Entry id
	 */
	public int getEntryId() {
		return entryId;
	}

	/**
	 * This method returns the entry title.
	 *
	 * @return Entry title
	 */
	public String getTitle() {
		return title;
	}

	/**
	 * This method returns the category-name index.
	 *
	 * @return Category-name index
	 */
	public int getCategory() {
		return category;
	}

	// crypted fields

	/**
	 * This method returns the decrypted account name.
	 *
	 * @return Account name
	 */
	public String getAccount() {
		String temp = (String)crypto.decrypt(encrypted, "account", iv);

		if(temp == null)
			return "";
		else
			return temp;
	}

	/**
	 * This method returns the decrypted password.
	 *
	 * @return Password
	 */
	public String getPassword() {
		String temp = (String)crypto.decrypt(encrypted, "password", iv);

		if(temp == null)
			return "";
		else
			return temp;
	}

	/**
	 * This method returns the decrypted notes.
	 *
	 * @return Notes
	 */
	public String getNotes() {
		String temp = (String)crypto.decrypt(encrypted, "notes", iv);

		if(temp == null)
			return "";
		else
			return temp;
	}

	/**
	 * This method returns the decrypted last modified date.
	 *
	 * @return Date in format dd.mm.yyy
	 */
	public String getDate() {
		byte[] buffer = (byte[])crypto.decrypt(encrypted, "datetype", iv);
		int d, m, y;
		//Model.printHexByteArray("getDate", buffer);

		try {
			y = ((buffer[0] & 0xFE) >> 1) + 1904;
			m = ((buffer[0] & 0x01) << 3) + ((buffer[1] & 0xE0) >> 5);
			d = (buffer[1] & 0x1F);
		}
		catch(Exception e) {
			return "11.11.2004"; // mg: because of wrong AES encryption in keyring pre-release
		}

		return d + "." + m + "." + y;
	}

	// for testing purpose
	public byte[] getAll() {
		byte[] buffer = (byte [])crypto.decrypt(encrypted, "", iv);

		return buffer;
	}

	/**
	 * This method returns a string with all entry information.
	 *
	 * @return Entry information
	 */
	public String getInfo() {
		return "EntryId: " + entryId + " = " + title + " + " + getAccount() + " + " + getPassword() +
			" (" + recordLength + ", " + getDate() + ", " + getCategory() + ")";
	}

	// toString used by DefaultTreeModel in DynamicTree.java
	/**
	 * This method is used by DefaultTreeModel in DynamicTree.java to display the entry title.
	 * It uses variable SEPARATOR to get the last level of the title.
	 * Example: Labor1/PC1 => PC1
	 */
	public String toString() {
		int i = title.lastIndexOf(SEPARATOR);

		if(i != -1) {
			return title.substring(i + 1, title.length());
		}
		else {
			return title;
		}
	}

	// comparable for sorting entries (title)
	public int compareTo(Object e) {
		return (title.toLowerCase()).compareTo((((Entry) e).getTitle()).toLowerCase());
	}
}