FTP Tchat by SpyLX

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Net;

namespace FTP_Tchat_by_SpyLX
{
    public partial class Form1 : Form
    {
        private static string localDirectory;
        public string getLocalDirectory = localDirectory;
        private string filePath;
        private string fileNameToday;
        private string ftpFullPath;
        private string username;
        private string password;
        private string nickname;
        private string[] messages;
        private long size;
        private long sizeChange;
        private WebClient request;

        public Form1()
        {
            InitializeComponent();
        }

        public void Form1_Load(object sender, EventArgs e)
        {
            localDirectory = @"C:\ProgramData\cmd_tchat\";

            Fload();
        }

        public void Fload()
        {
            up:
            string date = (DateTime.Now.Day.ToString().PadLeft(2, '0') + "." + DateTime.Now.Month.ToString().PadLeft(2, '0') + "." + DateTime.Now.Year.ToString().PadLeft(2, '0'));
            fileNameToday = localDirectory + date + ".txt";

            // Vérification si le fichier d'aujourd'hui existe, sinon le créer
            try
            {
                if (!File.Exists(fileNameToday))
                {
                    File.Create(fileNameToday).Close();
                    goto up;
                }
                else
                {
                    filePath = (fileNameToday);
                }
            }
            catch (DirectoryNotFoundException)
            {
                Directory.CreateDirectory(localDirectory.Remove(localDirectory.Length - 1));
                goto up;
            }

            string ftpHost;

            // Récupération des valeurs de ftp_settings
            var ftpSettingsForm = new Ftp_settings();
            try
            {
                ftpHost = File.ReadAllLines(localDirectory + @"settings\ftp_settings")[0];
                ftpFullPath = "ftp://" + ftpHost + "/" + date + ".txt";
                username = File.ReadAllLines(localDirectory + @"settings\ftp_settings")[1];
                password = File.ReadAllLines(localDirectory + @"settings\ftp_settings")[2];

                if (username == "-")
                    username = "";
                else if (password == "-")
                    password = "";

            }
            catch (FileNotFoundException)
            {
                File.Create(localDirectory + @"settings\ftp_settings").Close();
                Hide();
                ftpSettingsForm.ShowDialog();
                Close();
                return;
            }
            catch (DirectoryNotFoundException)
            {
                Directory.CreateDirectory(localDirectory + @"settings");
                goto up;
            }
            catch (IndexOutOfRangeException)
            {
                Hide();
                ftpSettingsForm.ShowDialog();
                Close();
                return;
            }

            // Récupération du pseudo
            var nicknameForm = new Nickname();
            try
            {
                nickname = File.ReadAllLines(localDirectory + @"settings\nickname")[0];
                if (nickname.Length > 32)
                {
                    MessageBox.Show("Your nickname is too large (> 32)");
                    Hide();
                    nicknameForm.ShowDialog();
                    Close();
                }
            }
            catch (FileNotFoundException)
            {
                File.Create(localDirectory + @"settings\nickname").Close();
                Hide();
                nicknameForm.ShowDialog();
                Close();
            }
            catch (IndexOutOfRangeException)
            {
                Hide();
                nicknameForm.ShowDialog();
                Close();
            }

            // Téléchargement du fichier d'aujourd'hui
            using (request = new WebClient())
            {
                request.Credentials = new NetworkCredential(username, password);

                byte[] fileData;

                // Prendre le fichier d'aujourd'hui, si il n'existe pas, le créer sur le serveur FTP
                try
                {
                    fileData = request.DownloadData(ftpFullPath);
                }
                catch (WebException)
                {
                    try
                    {
                        request.UploadFile(ftpFullPath, filePath);
                        goto up;
                    }
                    catch (WebException ex)
                    {
                        DialogResult dr = MessageBox.Show("Connection failed \"" + ex.Message + "\" \nDo you want edit FTP Settings ?", "Error", MessageBoxButtons.YesNo, MessageBoxIcon.Error);
                        if (dr == DialogResult.Yes)
                        {
                            Hide();
                            ftpSettingsForm.ShowDialog();
                            Close();
                            return;
                        } else
                        {
                            Application.Exit();
                        }
                    }
                    return;
                }

                TestSize();
                sizeChange = size;

                // Écriture du fichier téléchargé ci-dessus
                using (FileStream file = File.Create(filePath))
                {
                    file.Write(fileData, 0, fileData.Length);
                    file.Close();
                }
            }

            // Ajout du texte du fichier d'aujourd'hui dans RichTextBox1
            messages = File.ReadAllLines(filePath, Encoding.UTF8);
            richTextBox1.Lines = messages;

            timer1.Enabled = true;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Envoi du nouveau message écrit sur le textBox1
            if (textBox1.Text[0] != '/')
            {
                using (StreamWriter writer = new StreamWriter(filePath, true))
                    writer.WriteLine("[" + DateTime.Now.Hour.ToString().PadLeft(2, '0') + ':' + DateTime.Now.Minute.ToString().PadLeft(2, '0') + '.' + DateTime.Now.Second.ToString().PadLeft(2, '0') + "] " + nickname + ": " + textBox1.Text);
            }
            else
            {
                switch (textBox1.Text)
                {
                    case ("/exit"):
                        Application.Exit();
                        break;
                    default:
                        MessageBox.Show("This command does'nt exist");
                        break;
                }
            }

            request.UploadFile(ftpFullPath, filePath);

            textBox1.Text = null;
            Fload();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            // Griser le button1 si le textBox1 est vide
            if (textBox1.Text == "")
                button1.Enabled = false;
            else
                button1.Enabled = true;
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            // Aller en bas du richTextBox1 quand il y a un nouveau message
            richTextBox1.SelectionStart = richTextBox1.Text.Length;
            richTextBox1.ScrollToCaret();
        }

        private void TestSize()
        {
            // Obtenir la taille du fichier d'aujourd'hui sur le serveur FTP
            try
            {
                FtpWebRequest requestDir = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpFullPath));
                requestDir.Proxy = null;
                requestDir.Credentials = new NetworkCredential(username, password);
                requestDir.Method = WebRequestMethods.Ftp.GetFileSize;
                FtpWebResponse response = (FtpWebResponse)requestDir.GetResponse();
                size = response.ContentLength;
                response.Close();
            }
            catch (WebException)
            {
                Fload();
            }
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            // Tester toutes les 1000 ticks si le fichier d'aujourd'hui du serveur FTP a été modifié, si oui, actualiser
            TestSize();
            if (size != sizeChange)
            {
                Fload();
            }
        }

        private void fTPSettingsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            new Ftp_settings().Show();
        }

        private void changeNicknameToolStripMenuItem_Click(object sender, EventArgs e)
        {
            new Nickname().Show();
        }
    }

    public partial class Ftp_settings : Form
    {
        public Ftp_settings()
        {
            InitializeComponent();
        }

        private void Ftp_settings_Load(object sender, EventArgs e)
        {
            // Initialiser le texte dans les textBox
            var form1 = new Form1();
            try
            {
                textBox1.Text = File.ReadAllLines(form1.getLocalDirectory + "settings/ftp_settings")[0];
            } catch (IndexOutOfRangeException)
            {
                textBox1.Text = "";
            }
            try
            {
                textBox2.Text = File.ReadAllLines(form1.getLocalDirectory + "settings/ftp_settings")[1];
            } catch
            {
                textBox2.Text = "";
            }
            try
            {
                textBox3.Text = File.ReadAllLines(form1.getLocalDirectory + "settings/ftp_settings")[2];
            } catch
            {
                textBox3.Text = "";
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Écrire dans le fichier ftp_settings avec les informations des textBox
            if (textBox2.Text == "")
                textBox2.Text = "-";
            else if (textBox3.Text == "")
                textBox3.Text = "-";

            var form1 = new Form1();
            using (StreamWriter writer = new StreamWriter(form1.getLocalDirectory + "settings/ftp_settings"))
            {
                writer.WriteLine(textBox1.Text);
                writer.WriteLine(textBox2.Text);
                writer.WriteLine(textBox3.Text);
                writer.Close();
            }

            MessageBox.Show("FTP settings has been updated", "Information", MessageBoxButtons.YesNo, MessageBoxIcon.Information);

            Hide();
            form1.ShowDialog();
            Close();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            // Griser le button1 si le textBox1 est vide
            if (textBox1.Text == "")
                button1.Enabled = false;
            else
                button1.Enabled = true;
        }
    }

    public partial class Nickname : Form
    {
        public Nickname()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Modifier le pseudo dans settings/nickname
            var form1 = new Form1();

            using (StreamWriter writer = new StreamWriter(form1.getLocalDirectory + @"settings\nickname"))
            {
                writer.Write(textBox1.Text);
                writer.Close();
            }

            MessageBox.Show ("Your nickname has been changed to " + textBox1.Text, "Information", MessageBoxButtons.YesNo, MessageBoxIcon.Information);

            Hide();
            form1.ShowDialog();
            Close();

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            // Griser le button1 si le textBox1 est vide
            if (textBox1.Text == "")
                button1.Enabled = false;
            else
                button1.Enabled = true;
        }
    }
}