Rogashova_E.A._CourseWork_Hospital/HospitalDataBaseImplements/Implements/SymptomsStorage.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 SymptomsStorage : ISymptomsStorage
    {
        public List<SymptomsViewModel> GetFullList()
        {
            using var context = new HospitalDatabase();
            return context.Symptomses
            .Select(x => x.GetViewModel)
           .ToList();
        }
        public List<SymptomsViewModel> GetFilteredList(SymptomsSearchModel model)
        {
            if (string.IsNullOrEmpty(model.SymptomName))
            {
                return new();
            }
            using var context = new HospitalDatabase();
            return context.Symptomses
            .Where(x => x.SymptomName.Contains(model.SymptomName))
           .Select(x => x.GetViewModel)
           .ToList();
        }
        public SymptomsViewModel? GetElement(SymptomsSearchModel model)
        {
            if (string.IsNullOrEmpty(model.SymptomName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new HospitalDatabase();
            return context.Symptomses
            .FirstOrDefault(x =>
           (!string.IsNullOrEmpty(model.SymptomName) && x.SymptomName ==
           model.SymptomName) ||
            (model.Id.HasValue && x.Id == model.Id))
            ?.GetViewModel;
        }
        public SymptomsViewModel? Insert(SymptomsBindingModel model)
        {
            var newSymptoms = Symptoms.Create(model);
            if (newSymptoms == null)
            {
                return null;
            }
            using var context = new HospitalDatabase();
            context.Symptomses.Add(newSymptoms);
            context.SaveChanges();
            return newSymptoms.GetViewModel;
        }
        public SymptomsViewModel? Update(SymptomsBindingModel model)
        {
            using var context = new HospitalDatabase();
            var symptom = context.Symptomses.FirstOrDefault(x => x.Id == model.Id);
            if (symptom == null)
            {
                return null;
            }
            symptom.Update(model);
            context.SaveChanges();
            return symptom.GetViewModel;
        }
        public SymptomsViewModel? Delete(SymptomsBindingModel model)
        {
            using var context = new HospitalDatabase();
            var element = context.Symptomses.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Symptomses.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}