ISEbd-21_Zinovev_V.V._FurnitureAssembly/FurnitureAssembly/FurnitureAssemblyFileImplement/Implements/MessageInfoStorage.cs

using FurnitureAssemblyContracts.BindingModels;
using FurnitureAssemblyContracts.SearchModels;
using FurnitureAssemblyContracts.StoragesContracts;
using FurnitureAssemblyContracts.ViewModels;
using FurnitureAssemblyFileImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FurnitureAssemblyFileImplement.Implements
{
    public class MessageInfoStorage : IMessageInfoStorage
    {
        private readonly DataFileSingleton source;

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

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

        public List<MessageInfoViewModel> GetFilteredList(MessageInfoSearchModel model)
        {
            if (!model.ClientId.HasValue)
            {
                return source.Messages
                    .Select(x => GetViewModel(x))
                    .ToList();
            }

            return source.Messages
                .Where(x => x.ClientId == model.ClientId)
                .Select(x => GetViewModel(x))
                .ToList();
        }

        public MessageInfoViewModel? GetElement(MessageInfoSearchModel model)
        {
            if (!model.ClientId.HasValue)
            {
                return null;
            }

            return source.Messages.FirstOrDefault(x => (model.ClientId.HasValue && x.ClientId == model.ClientId))?.GetViewModel;
        }

        public MessageInfoViewModel? Insert(MessageInfoBindingModel model)
        {
            model.MessageId = source.Messages.Count > 0 ? Convert.ToString(source.Messages.Count + 1) : "1";

            var newMessage = MessageInfo.Create(model);

            if (newMessage == null)
            {
                return null;
            }

            source.Messages.Add(newMessage);
            source.SaveOrders();

            return GetViewModel(newMessage);
        }
        private MessageInfoViewModel GetViewModel(MessageInfo message)
        {
            return message.GetViewModel;
        }
    }
}