PIbd-23_Leonteva_V._A._LawFirm/LawFirm/LawFirmFileImplement/Implements/BlankStorage.cs

using LawFirmContracts.BindingModels;
using LawFirmContracts.SearchModels;
using LawFirmContracts.StoragesContracts;
using LawFirmContracts.ViewModels;
using LawFirmFileImplement.Models;

namespace LawFirmFileImplement.Implements
{
    public class BlankStorage : IBlankStorage
    {
        private readonly DataFileSingleton source;
        public BlankStorage()
        {
            source = DataFileSingleton.GetInstance();
        }
        public List<BlankViewModel> GetFullList()
        {
            return source.Blanks.Select(x => x.GetViewModel).ToList();
        }
        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 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 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 component = source.Blanks.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            source.SaveBlanks();
            return component.GetViewModel;
        }
        public BlankViewModel? Delete(BlankBindingModel model)
        {
            var element = source.Blanks.FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                source.Blanks.Remove(element);
                source.SaveBlanks();
                return element.GetViewModel;
            }
            return null;
        }
    }
}