AvtoservisVika/AutoServiceVika/Pages/AddEditPage.xaml.cs

using AutoServiceVika.Entites;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace AutoServiceVika.Pages
{
    /// <summary>
    /// Логика взаимодействия для AddEditPage.xaml
    /// </summary>
    public partial class AddEditPage : Page
    {
        private Service _currentService = null;
        private byte[] _mainImageData;

        public AddEditPage()
        {
            InitializeComponent();
        }

        public AddEditPage(Service service)
        {
            InitializeComponent();

            _currentService = service;
            tbName.Text = service.Title;
            tbCost.Text = service.Cost.ToString("N2");
            tbDurationInSecond.Text = (service.DurationInSeconds / 60).ToString();
            tbDiscription.Text = service.Description;
            if (service.Discount > 0)
                tbDiscount.Text = (service.Discount.Value * 100).ToString();
            if (service.Image != null)
                imgImage.Source = (ImageSource) new ImageSourceConverter().ConvertFrom(service.Image);
        }

        private string CheckErrors()
        {
            var errorBuider = new StringBuilder();

            if (string.IsNullOrEmpty(tbName.Text))
                errorBuider.AppendLine("Название услуги обязательно для заполнения;");

            var serviceFromDB = App.context.Service.ToList().FirstOrDefault(p => p.Title.ToLower() == tbName.Text.ToLower());
            if (serviceFromDB != null && serviceFromDB != _currentService)
                errorBuider.AppendLine("Такая услуга уже существует;");

            decimal cost = 0;
            if (decimal.TryParse(tbCost.Text, out cost) == false || cost <= 0)
                errorBuider.AppendLine("Стоимость услуги должно быть положительное число;");

            if (!string.IsNullOrEmpty(tbDiscount.Text))
            {
                int discoutn = 0;
                if (int.TryParse(tbDiscount.Text, out discoutn) == false || discoutn < 0 || discoutn > 100)
                    errorBuider.AppendLine("Размер скидки - целое число в диапазоне от 0 до 100%");
            }

            if (errorBuider.Length > 0)
                errorBuider.Insert(0, "Устраните следующие ошибки: \n");

            return errorBuider.ToString();
        }

        private void btnSelectImage_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "Image |*.png; *.jpg; *.jpeg";
            if (ofd.ShowDialog() == true)
            {
                _mainImageData = File.ReadAllBytes(ofd.FileName);
                imgImage.Source = (ImageSource)new ImageSourceConverter().ConvertFrom(_mainImageData);
            }
        }

        private void btnSave_Click(object sender, RoutedEventArgs e)
        {
            var errorMessage = CheckErrors();
            if (errorMessage.Length > 0)
                MessageBox.Show(errorMessage, "Ошибка", MessageBoxButton.OK, MessageBoxImage.Error);
            else
            {
                if (_currentService == null)
                {
                    var service = new Service
                    {
                        Title = tbName.Text,
                        Cost = decimal.Parse(tbCost.Text),
                        DurationInSeconds = int.Parse(tbDurationInSecond.Text) * 60,
                        Description = tbDiscription.Text,
                        Discount = string.IsNullOrEmpty(tbDiscount.Text) ? 0 : double.Parse(tbDiscount.Text) / 100,
                        Image = _mainImageData
                    };
                    App.context.Service.Add(service);
                    App.context.SaveChanges();
                } else
                {
                    _currentService.Title = tbName.Text;
                    _currentService.Cost = decimal.Parse(tbCost.Text);
                    _currentService.DurationInSeconds = int.Parse(tbDurationInSecond.Text) * 60;
                    _currentService.Description = tbDiscription.Text;
                    _currentService.Discount = string.IsNullOrEmpty(tbDiscount.Text) ? 0 : double.Parse(tbDiscount.Text) / 100;
                    if(_mainImageData != null)
                        _currentService.Image = _mainImageData;
                    App.context.SaveChanges();
                }
                App.MainFrame.GoBack();
            }
        }
    }
}