RestaurantSite_API/ProRestaurant/Repository/Accounts/UserRepository.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Internal;
using ProRestaurant.Classes;
using ProRestaurant.Containers;
using ProRestaurant.DBContexts;
using ProRestaurant.Models.Accounts;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text.RegularExpressions;

namespace ProRestaurant.Repository.Accounts
{
    public class UserRepository : IUserRepository
    {
        private readonly DBContext dBContext;

        public UserRepository(DBContext _DB)
        {
            dBContext = _DB;
        }

        public User GetUser(Func<User, bool> where)
        {
            var user = dBContext.Users.Where(where).FirstOrDefault();
            if (user == null)
            {
                user = new User
                {
                    EmailAddress = "",
                    Password = "",
                    FirstName = "",
                    Surname = "",
                    Cellphone = ""
                };
            }
            return user;
        }

        public IEnumerable<User> GetUsers()
        {
            return dBContext.Users.ToList();
        }

        public void Insert(User user)
        {            
            dBContext.Add(user);
            Save();
        }

        public UserContainer Login(string UserName, string Password)
        {
            UserContainer returnObject = new UserContainer();
            User user;

            string pattern = @"\A(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?)\Z";
            if (Regex.IsMatch(UserName, pattern))
                user = dBContext.Users.Where(u => u.EmailAddress == UserName).FirstOrDefault();
            else
                user = dBContext.Users.Where(u => u.Cellphone == UserName).FirstOrDefault();

            if (user != null)
            {
                if (user.Password == Password)
                {
                    returnObject.user = user;
                    returnObject.ResultString = "Access Granted";
                }
                else
                    returnObject.ResultString = "Password incorrect";
            }
            else
            {
                returnObject.ResultString = "User not found";
            }


            return returnObject;
        }

        public void Remove(User user)
        {
            dBContext.Users.Remove(user);
            Save();
        }

        public void Save()
        {
            dBContext.SaveChanges();
        }

        public void Update(User user)
        {
            dBContext.Entry(user).State = EntityState.Modified;
            Save();
        }
    }
}