ISEbd-21_Agliullov.D.A._Confectionery/ConfectionaryListImplement/MessageInfoStorage.cs

using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.SearchModels;
using ConfectioneryContracts.StoragesContract;
using ConfectioneryContracts.ViewModels;
using ConfectioneryListImplement.Models;

namespace ConfectioneryListImplement
{
	public class MessageInfoStorage : IMessageInfoStorage
	{
		private readonly DataListSingleton _source;
		public MessageInfoStorage()
		{
			_source = DataListSingleton.GetInstance();
		}

		public MessageInfoViewModel? GetElement(MessageInfoSearchModel model)
		{
			foreach (var message in _source.Messages)
			{
				if (model.MessageId != null && model.MessageId.Equals(message.MessageId))
					return message.GetViewModel;
			}
			return null;
		}

		public List<MessageInfoViewModel>? GetListOnPage(int page, int pageSize)
		{
			if (page * pageSize >= _source.Messages.Count)
			{
				return null;
			}
			List<MessageInfoViewModel> result = new();
			for (var i = (page - 1) * pageSize; i < page * pageSize; i++)
			{
				result.Add(_source.Messages[i].GetViewModel);
			}
			return result;
		}

		public List<MessageInfoViewModel> GetFilteredList(MessageInfoSearchModel model)
		{
			List<MessageInfoViewModel> result = new();
			foreach (var item in _source.Messages)
			{
				if (item.ClientId.HasValue && item.ClientId == model.ClientId)
				{
					result.Add(item.GetViewModel);
				}
			}
			return result;
		}

		public List<MessageInfoViewModel> GetFullList()
		{
			List<MessageInfoViewModel> result = new();
			foreach (var item in _source.Messages) 
			{
				result.Add(item.GetViewModel);
			}
			return result;
		}

		public MessageInfoViewModel? Insert(MessageInfoBindingModel model)
		{
			var newMessage = MessageInfo.Create(model);
			if (newMessage == null)
			{
				return null;
			}
			_source.Messages.Add(newMessage);
			return newMessage.GetViewModel;
		}
	}
}