Rogashova_E.A._CourseWork_Hospital/HospitalDataBaseImplements/Implements/MedicinesStorage.cs

using HospitalContracts.BindingModels;
using HospitalContracts.SearchModels;
using HospitalContracts.StoragesContracts;
using HospitalContracts.ViewModels;
using HospitalDataBaseImplements.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HospitalDataBaseImplements.Implements
{
    public class MedicinesStorage : IMedicinesStorage
    {
        public List<MedicinesViewModel> GetFullList()
        {
            using var context = new HospitalDatabase();
            return context.Medicines
            .Select(x => x.GetViewModel)
           .ToList();
        }
        public List<MedicinesViewModel> GetFilteredList(MedicinesSearchModel model)
        {
            if (string.IsNullOrEmpty(model.MedicinesName))
            {
                return new();
            }
            using var context = new HospitalDatabase();
            return context.Medicines
            .Where(x => x.MedicinesName.Contains(model.MedicinesName))
           .Select(x => x.GetViewModel)
           .ToList();
        }
        public MedicinesViewModel? GetElement(MedicinesSearchModel model)
        {
            if (string.IsNullOrEmpty(model.MedicinesName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new HospitalDatabase();
            return context.Medicines
            .FirstOrDefault(x =>
            (!string.IsNullOrEmpty(model.MedicinesName) && x.MedicinesName ==
           model.MedicinesName) ||
            (model.Id.HasValue && x.Id == model.Id))
            ?.GetViewModel;
        }
        public MedicinesViewModel? Insert(MedicinesBindingModel model)
        {
            var newMedicine = Medicines.Create(model);
            if (newMedicine == null)
            {
                return null;
            }
            using var context = new HospitalDatabase();
            context.Medicines.Add(newMedicine);
            context.SaveChanges();
            return newMedicine.GetViewModel;
        }
        public MedicinesViewModel? Update(MedicinesBindingModel model)
        {
            using var context = new HospitalDatabase();
            var medicine = context.Medicines.FirstOrDefault(x => x.Id == model.Id);
            if (medicine == null)
            {
                return null;
            }
            medicine.Update(model);
            context.SaveChanges();
            return medicine.GetViewModel;
        }
        public MedicinesViewModel? Delete(MedicinesBindingModel model)
        {
            using var context = new HospitalDatabase();
            var element = context.Medicines.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Medicines.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}