accountmanager

import java.io.*;
import java.util.*;

/**
 *
 * @author Zion
 *
 * This class manages all stored accounts
 *
 */
public class AccountManager {

    /**
     * Account file save location
     */
    private static File saveAccountFile = new File(Signlink.findcachedir() + "/accounts.dat");

    /**
     * Stores the accounts
     */
    public static List<AccountData> accounts = new LinkedList<AccountData>();

    /**
     * Gets all the stored accounts in the map
     *
     * @return
     */
    public static List<AccountData> getAccounts() {
        return accounts;
    }

    /**
     * Gets account for specified name
     *
     * @param username
     * @return
     */
    public static AccountData getAccount(String username) {
        for (AccountData account : accounts) {
            if (account.username.equalsIgnoreCase(username)) {
                return account;
            }
        }
        return null;
    }

    /**
     *  Adds the account to the account map
     *
     * @param account
     */
    public static void addAccount(AccountData account) {
        if (!accounts.isEmpty()) {
            for (int size = 0; size < accounts.size(); size++) {
                if (accounts.get(size).username.equalsIgnoreCase(account.username)) {
                    accounts.get(size).uses += 1;
                    saveAccount();
                    return;
                }
            }
        }
        if (account.username == null && account.username.length() <= 0 || account.password == null && account.password.length() <= 0) {
            return;
        }
        accounts.add(account);
        saveAccount();
    }

    /**
     * Clears the account map
     */
    public static void clearAccountList() {
        accounts.clear();
        saveAccount();
    }

    /**
     * Removes a desired account from the <accounts> map
     *
     * @param account
     */
    public static void removeAccount(AccountData account) {
        if (!accounts.contains(account)) {
            return;
        }
        accounts.remove(account);
        saveAccount();
    }

    /**
     * Saves the account
     */
    public static void saveAccount() {
        if (accounts == null || accounts.isEmpty()) {
            return;
        }
        try {
            DataOutputStream output = new DataOutputStream(new FileOutputStream(saveAccountFile));
            output.writeByte(accounts.size());
            for (int index = 0; index < accounts.size(); index++) {
                AccountData account = accounts.get(index);
                output.writeInt(account.rank);
                output.writeInt(account.uses);
                output.writeUTF(account.username);
                output.writeUTF(account.password);
            }
            output.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Loads the account
     */
    public static void loadAccount() {
        if (!saveAccountFile.exists()) {
            return;
        }
        try {
            DataInputStream input = new DataInputStream(new FileInputStream(saveAccountFile));
            int fileSize = input.readByte();
            for (int index = 0; index < fileSize; index++) {
                int rank = input.readInt();
                int uses = input.readInt();
                String username = input.readUTF();
                String password = input.readUTF();
                AccountData account = new AccountData(rank, uses, username, password);
                accounts.add(account);
            }
            input.close();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}