EmptyMauiApp/MauiApp/Core/Business/UserSessionService.cs

using System.Text.Json;
using MauiApp.Core.Business.Contracts;
using MauiApp.Core.Models;
using MauiApp.Core.Models.Contracts;
using MauiApp.Core.System.LocalStorage.Contracts;

namespace MauiApp.Core.Business;

public class UserSessionService(ILocalStorage localStorage) : IUserSessionService
{
    public IUserSession Session
    {
        get => LoadSession().Result;
        set
        {
            localStorage.Remove(nameof(Session)).Wait();

            if (value != null)
                StoreSession(value).Wait();
        }
    }

    private async Task<IUserSession> LoadSession()
    {
        try
        {
            var jsonSession = await localStorage.GetItemString(nameof(Session));

            if (string.IsNullOrWhiteSpace(jsonSession))
                return null;

            IUserSession session = JsonSerializer.Deserialize<UserSession>(jsonSession);
            return session;
        }
        catch (Exception ex)
        {
            return null;
        }
    }
    private async Task StoreSession(IUserSession session)
    {
        var jsonSesson = JsonSerializer.Serialize(session);
        await localStorage.SetItemString(nameof(Session), jsonSesson);
    }

    public async Task<bool> IsValid()
    {
        return await Task.FromResult(Session is not null);
    }

    public async Task CreateNewSession(string userId, string token, string refreshToken, string email, string profileDb)
    {
        Session = new UserSession()
        {
            UserId = userId,
            AccessToken = token,
            RefreshToken = refreshToken,
            Email = email,
            ProfileDb = profileDb
        };
        await Task.CompletedTask;
    }

    public async Task ClearStoredSession()
    {
        Session = null;
        await Task.CompletedTask;
    }

    public Task RefreshToken(string accessToken, string refreshToken)
    {
        var session = (UserSession) Session;
        session.AccessToken = accessToken;
        session.RefreshToken = refreshToken;
        Session = session;
        return Task.CompletedTask;
    }
}