yavsc/BookAStar/BookAStar/ViewModels/DashboardViewModel.cs

using BookAStar.Helpers;
using BookAStar.Model.Auth.Account;
using System.Collections.ObjectModel;
using System.Linq;
using Xamarin.Forms;
using XLabs.Forms.Mvvm;

namespace BookAStar.ViewModels
{
    internal class DashboardViewModel : ViewModel
    {
        public string UserId
        {
            get
            {
                return User?.Id;
            }
        }

        public bool AllowUseMyPosition
        {
            get
            {
                return MainSettings.AllowGPSUsage;
            }
            set
            {
                MainSettings.AllowGPSUsage = value;
            }
        }

        public bool AllowProBookingOnly
        {
            get
            {
                return MainSettings.AllowProBookingOnly;
            }
            set
            {
                MainSettings.AllowProBookingOnly = value;
            }
        }

        private long queryCount;
        private User user;

        public long QueryCount
        {
            get
            {
                return queryCount;
            }
        }

        public User User
        {
            get { return user; }
            protected set
            {
                SetProperty<User>(ref user, value, "User");
                if (user!=null)
                {
                    user.PropertyChanged += User_PropertyChanged;

                }

                UpdateUserMeta();

            }
        }
        private ImageSource avatar;
        public ImageSource Avatar {  get {
                return avatar;
            } }

        public ObservableCollection<User> Accounts { get; protected set; }
        private string performerStatus;
        public string PerformerStatus
        {
            get
            {
                return performerStatus;
            }
        }

        public string UserName
        {
            get
            {
                return User?.UserName;
            }
        }

        private bool userIsPro = false;

        public DashboardViewModel()
        {
            Accounts = MainSettings.AccountList;
            User = MainSettings.CurrentUser;
            UpdateUserMeta();
        }

        private void UpdateUserMeta ()
        {
            string newStatusString;
            long newQueryCount;
            bool newUserIsPro;
            ImageSource newAvatar;
            if (user==null)
            {
                newQueryCount = 0;
                newUserIsPro = false;
                newStatusString = null;
                newAvatar = null;
            }
            else
            {
                newUserIsPro = User.Roles?.Contains("Performer") ?? false;

                newQueryCount = userIsPro ? DataManager.Current.BookQueries.Count : 0;

                newStatusString = userIsPro ?
                     $"Profile professionel renseigné,\n{newQueryCount} demandes valides en cours" :
                    "Profile professionel non renseigné";
                newAvatar = UserHelpers.Avatar(user.Avatar);
            }
            SetProperty<string>(ref performerStatus, newStatusString, "PerformerStatus");
            SetProperty<long>(ref queryCount, newQueryCount, "QueryCount");
            SetProperty<ImageSource>(ref avatar, newAvatar, "Avatar");
        }

        private void User_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            UpdateUserMeta();
        }
    }
}