Module.PremiumArea/Server/Repository/UserPremiumRepository.cs

using System;
using Microsoft.EntityFrameworkCore;
using System.Linq;
using System.Collections.Generic;
using Oqtane.Modules;
using SZUAbsolventenverein.Module.PremiumArea.Models;

namespace SZUAbsolventenverein.Module.PremiumArea.Repository
{
    public interface IUserPremiumRepository
    {
        UserPremium GetUserPremium(int UserId);
        UserPremium SaveUserPremium(UserPremium UserPremium);
        void AddPremiumEvent(PremiumEvent premiumEvent);
        IEnumerable<PremiumEvent> GetPremiumEvents(int UserId);
    }

    public class UserPremiumRepository : IUserPremiumRepository, ITransientService
    {
        private readonly IDbContextFactory<PremiumAreaContext> _factory;

        public UserPremiumRepository(IDbContextFactory<PremiumAreaContext> factory)
        {
            _factory = factory;
        }

        public UserPremium GetUserPremium(int UserId)
        {
            using var db = _factory.CreateDbContext();
            return db.UserPremium.FirstOrDefault(item => item.UserId == UserId);
        }

        public UserPremium SaveUserPremium(UserPremium UserPremium)
        {
            using var db = _factory.CreateDbContext();
            if (UserPremium.Id > 0)
            {
                 var existing = db.UserPremium.Find(UserPremium.Id);
                 if (existing != null)
                 {
                     existing.UserId = UserPremium.UserId;
                     existing.PremiumUntil = UserPremium.PremiumUntil;
                     existing.ModifiedBy = UserPremium.ModifiedBy ?? "system";
                     existing.ModifiedOn = DateTime.UtcNow;
                     db.SaveChanges();
                 }
            }
            else
            {
                UserPremium.CreatedBy = UserPremium.CreatedBy ?? "system";
                UserPremium.CreatedOn = DateTime.UtcNow;
                UserPremium.ModifiedBy = UserPremium.ModifiedBy ?? "system";
                UserPremium.ModifiedOn = DateTime.UtcNow;
                db.UserPremium.Add(UserPremium);
                db.SaveChanges();
            }
            return UserPremium;
        }

        public void AddPremiumEvent(PremiumEvent premiumEvent)
        {
            using var db = _factory.CreateDbContext();
            premiumEvent.CreatedBy = premiumEvent.CreatedBy ?? "system";
            premiumEvent.CreatedOn = DateTime.UtcNow;
            premiumEvent.ModifiedBy = premiumEvent.ModifiedBy ?? "system";
            premiumEvent.ModifiedOn = DateTime.UtcNow;
            db.PremiumEvent.Add(premiumEvent);
            db.SaveChanges();
        }

        public IEnumerable<PremiumEvent> GetPremiumEvents(int UserId)
        {
            using var db = _factory.CreateDbContext();
            return db.PremiumEvent.Where(item => item.UserId == UserId).OrderByDescending(x => x.CreatedOn).ToList();
        }
    }
}