Login.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Shared;
using System.Threading;

namespace Client
{
    public partial class Login : Form
    {
        private IAccessHandler accessHandler;
        private LocalSettings localSettings;
        private RMIClient client;

        public Login()
        {
            this.localSettings = new LocalSettings();
            InitializeComponent();

            this.FormBorderStyle = FormBorderStyle.FixedDialog;

            txtUsername.Text = localSettings.Username;
            txtPassword.Text = localSettings.Password;
            chkRemember.Checked = localSettings.Username != null && localSettings.Username.Length > 0;

            if (txtUsername.Text.Length > 0)
            {
                chkRemember.Visible = false;
                cmdForgetMe.Visible = true;
            }

            pleaseWait.Dock = DockStyle.Fill;
        }

        private void btnLogin_Click(object sender, EventArgs e)
        {
            string user = txtUsername.Text;
            string pass = txtPassword.Text;

            ShowWaitScreen(true);

            if (user.Trim().Length < 1)
            {
                MessageBox.Show("Username is required!", "Try again!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                ShowWaitScreen(false);
                return;
            }
            if (pass.Trim().Length < 1)
            {
                MessageBox.Show("Password is required!", "Try again!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                ShowWaitScreen(false);
                return;
            }

            Thread thread = new Thread(new ThreadStart(delegate() {

                // Create a new connection to the RMI server
                if (!Connect())
                {
                    this.Invoke(new MethodInvoker(delegate() {
                        ShowWaitScreen(false);
                    }));
                    return;
                }

                Messages lm = accessHandler.Login(user, Utils.HashedValue(pass));
                if (lm != Messages.OK)
                {
                    MessageBox.Show("Login Failed!", "Try again!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    this.Invoke(new MethodInvoker(delegate() {
                        txtPassword.Text = "";
                        txtPassword.Focus();
                        ShowWaitScreen(false);
                    }));
                    return;
                }

                if (chkRemember.Checked)
                {
                    this.Invoke(new MethodInvoker(
                    delegate()
                    {
                        localSettings.Username = txtUsername.Text;
                        localSettings.Password = txtPassword.Text;
                    }));
                }

                this.Invoke(new MethodInvoker(delegate()
                {

                    MainWindow mw = new MainWindow(new ReconnectHandler(client, accessHandler));
                    this.Hide();
                    mw.FormClosed += delegate(object s, FormClosedEventArgs ea) { this.Show(); accessHandler = null; client.Stop(); };
                    mw.ShowDialog();

                    ShowWaitScreen(false);
                
                }));
            }));
            thread.Start();
        }
        
        private void btnQuit_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void Login_Shown(object sender, EventArgs e)
        {
            txtUsername.Focus();
        }

        public void ShowWaitScreen(bool toggle)
        {
            if (toggle)
            {
                pleaseWait.Begin();
                this.Refresh();
            }
            else
            {
                pleaseWait.End();
            }
        }

        public bool Connect()
        {
            if (accessHandler != null)
                return true;

            // Create a new connection to the RMI server 
            client = new RMIClient();
            accessHandler = client.Connect();

            if (accessHandler == null)
            {
                MessageBox.Show("SKRAMMEL could not create a connection to the server: "+client.ErrorMessage+"\nPlease check your settings and try again!", "Login Failed!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                // Stop the connection...
                client.Stop();
                return false;
            }
            return true;

        }

        private void cmdCreateUser_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            if (!Connect())
                return;
            Messages lm = Messages.Fail;
            DialogResult result = DialogResult.No;
            PersonInfo newUser = new PersonInfo();
            while (lm != Messages.OK && result != DialogResult.OK)
            {
                UserForm CreateNewUserForm = new UserForm();
                DialogResult dr = CreateNewUserForm.ShowDialog();
                newUser = CreateNewUserForm.PersonInfo;

                if (dr == DialogResult.Cancel)
                    return;

                lm = accessHandler.Register(newUser.username, Utils.HashedValue(newUser.password), newUser.name, newUser.department, newUser.email);
                if (lm != Messages.OK)
                {
                    MessageBox.Show("Username already Exists!", "Try again!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                } else 
                    MessageBox.Show("User was created!", "Success!", MessageBoxButtons.OK, MessageBoxIcon.Information);

                txtPassword.Text = newUser.password;
                txtUsername.Text = newUser.username;
            }
        }

        private void cmdWhatis_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            About about = new About();
            about.ShowDialog();
        }

        private void cmdForgetMe_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            localSettings.Username = "";
            localSettings.Password = "";
            txtUsername.Text = "";
            txtPassword.Text = "";
            cmdForgetMe.Visible = false;
            chkRemember.Visible = true;
            txtUsername.Focus();
        }

        private void btnConfigure_Click(object sender, EventArgs e)
        {
            LoginConfig lc = new LoginConfig(localSettings);
            lc.ShowDialog();
        }

        private void txtPassword_Enter(object sender, EventArgs e)
        {
            txtPassword.SelectAll();
        }

        private void txtUsername_Enter(object sender, EventArgs e)
        {
            txtUsername.SelectAll();
        }
    }
}

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