PIbd-23_Mochalov_D.V._LawFirm/LawFirm/LawFirmFileImplement/Implements/BlankStorage.cs

using LawFirmContracts.BindingModels;
using LawFirmContracts.SearchModels;
using LawFirmContracts.StorageContracts;
using LawFirmContracts.ViewModels;
using LawFirmFileImplement.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace LawFirmFileImplement.Implements
{
    public class BlankStorage : IBlankStorage
    {
        private readonly DataFileSingleton source;

        public BlankStorage()
        {
            source = DataFileSingleton.GetInstance();
        }

        public BlankViewModel? GetElement(BlankSearchModel model)
        {
            if (string.IsNullOrEmpty(model.BlankName) && !model.Id.HasValue)
            {
                return null;
            }
            return source.Blanks
            .FirstOrDefault(x => (!string.IsNullOrEmpty(model.BlankName) && x.BlankName == model.BlankName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }

        public List<BlankViewModel> GetFilteredList(BlankSearchModel model)
        {
            if (string.IsNullOrEmpty(model.BlankName))
            {
                return new();
            }
            return source.Blanks
                .Where(x => x.BlankName.Contains(model.BlankName))
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<BlankViewModel> GetFullList()
        {
            return source.Blanks.Select(x => x.GetViewModel).ToList();
        }

        public BlankViewModel? Insert(BlankBindingModel model)
        {
            model.Id = source.Blanks.Count > 0 ? source.Blanks.Max(x => x.Id) + 1 : 1;
            var newBlank = Blank.Create(model);
            if (newBlank == null)
            {
                return null;
            }
            source.Blanks.Add(newBlank);
            source.SaveBlanks();
            return newBlank.GetViewModel;
        }

        public BlankViewModel? Update(BlankBindingModel model)
        {
            var blank = source.Blanks.FirstOrDefault(x => x.Id == model.Id);
            if (blank == null)
            {
                return null;
            }
            blank.Update(model);
            source.SaveBlanks();
            return blank.GetViewModel;
        }
        public BlankViewModel? Delete(BlankBindingModel model)
        {
            var blank = source.Blanks.FirstOrDefault(x => x.Id == model.Id);
            if (blank == null)
            {
                return null;
            }
            source.Blanks.Remove(blank);
            source.SaveBlanks();
            return blank.GetViewModel;
        }

    }
}