Scanbox/ScanBox/Usuario.cs

using ScaBox30.Model;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ScaBox30
{
    public partial class Usuario : Form
    {

        

        public Usuario()
        {
            InitializeComponent();
            InitializeItems();
            InitializeButtons();
            LoadUsers();
        }

        private void LoadUsers()
        {
            CreateUserJson(Globals.auth_json);
            LoadUserJson(Globals.auth_json);

            if (Globals.users.Count > 0)
            {
                foreach (var user in Globals.users)
                {
                    comboUser.Items.Add(user.user);
                }
                comboUser.SelectedIndex = 0;
            }
        }

        private void CreateUserJson(string jsonfile)
        {
            if (!File.Exists(jsonfile))
            {
                List<User> users = new List<User> { };
                users.Add(new User() { user = "admin", password = "admin123" });
                var json = JsonSerializer.Serialize<List<User>>(users);
                File.WriteAllText(jsonfile, json);
                users.Clear();
            }
        }

        private void LoadUserJson(string jsonfile)
        {
            if (File.Exists(jsonfile))
            {
                Globals.users.Clear();
                string jsoncontent = File.ReadAllText(jsonfile);
                Globals.users = JsonSerializer.Deserialize<List<User>>(jsoncontent);
                jsoncontent = "";
            }
        }

        private void buttonOk_Click(object sender, EventArgs e)
        {
            if (Globals.users.Count() > 0)
            {
                var res = Globals.users.Find(u => u.password == textPassword.Text);
                if (res != null) { 
                    Globals.valid_user = true;
                    Globals.users.Clear();
                    this.Close();
                } else
                {
                    textPassword.Text = "";
                    Globals.valid_user = false;
                    Globals.users.Clear();
                    this.Close();
                }
            }
        }

        private void buttonCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (Globals.users.Count() > 0)
            {
                var res = Globals.users.Find(u => u.password == textPassword.Text);
                if (res != null)
                {
                    Globals.valid_user = true;
                    Globals.users.Clear();
                    this.Close();
                }
                else
                {
                    textPassword.Text = "";
                    Globals.valid_user = false;
                    Globals.users.Clear();
                    this.Close();
                }
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void InitializeItems()
        {
            this.FormBorderStyle = FormBorderStyle.None;
            this.Padding = new Padding(Globals.borderSize);//Set border size
            this.btnClose.DialogResult = DialogResult.Cancel;
            this.button1.DialogResult = DialogResult.OK;
            this.labelCaption.Text = this.Text;
            this.panelTitleBar.BackColor = Globals.primaryColor;
            this.panelTitleBar.Padding = new Padding(0, 0, 0, Globals.borderSize);
            this.BackColor = Globals.primaryColor;
        }

        private void InitializeButtons()
        {
            int xCenter = (this.panelButtons.Width - button1.Width) / 2;
            int yCenter = (this.panelButtons.Height - button1.Height) / 2;

            //OK Button
            button1.Visible = true;
            button1.Location = new Point(xCenter - (button1.Width / 2) - 5, yCenter);
            button1.Text = "Ok";
            button1.DialogResult = DialogResult.OK;//Set DialogResult

            //Cancel Button
            button2.Visible = true;
            button2.Location = new Point(xCenter + (button2.Width / 2) + 5, yCenter);
            button2.Text = "Cancel";
            button2.DialogResult = DialogResult.Cancel;//Set DialogResult
            button2.BackColor = Globals.colors.retry_cancell;
        }

        #region -> Drag Form
        [DllImport("user32.DLL", EntryPoint = "SendMessage")]
        private extern static void SendMessage(System.IntPtr hWnd, int wMsg, int wParam, int lParam);
        [DllImport("user32.DLL", EntryPoint = "ReleaseCapture")]
        private extern static void ReleaseCapture();
        private void panelTitleBar_MouseDown(object sender, MouseEventArgs e)
        {
            ReleaseCapture();
            SendMessage(this.Handle, 0x112, 0xf012, 0);
        }
        #endregion
    }
}