ServerSignatureViewModel.cs

using System.Globalization;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using NeuroAccessMaui.Resources.Languages;
using NeuroAccessMaui.Services;
using Waher.Networking.XMPP.Contracts;
 
namespace NeuroAccessMaui.UI.Pages.Signatures.ServerSignature
{
    public partial class ServerSignatureViewModel : BaseViewModel
    {
        private readonly Contract? contract;
 
        public ServerSignatureViewModel(ServerSignatureNavigationArgs? Args)
        {
            if (Args is not null)
                this.contract = Args.Contract;
        }
 
        public override async Task OnInitializeAsync()
        {
            await base.OnInitializeAsync();
 
            this.AssignProperties();
        }
 
        #region Properties
 
        [ObservableProperty]
        private string? provider;
 
        [ObservableProperty]
        private string? timestamp;
 
        [ObservableProperty]
        private string? signature;
 
        #endregion
 
        private void AssignProperties()
        {
            if (this.contract is not null)
            {
                this.Provider = this.contract.Provider;
                this.Timestamp = this.contract.ServerSignature.Timestamp.ToString(CultureInfo.CurrentCulture);
                this.Signature = Convert.ToBase64String(this.contract.ServerSignature.DigitalSignature);
            }
            else
            {
                this.Provider = Constants.NotAvailableValue;
                this.Timestamp = Constants.NotAvailableValue;
                this.Signature = Constants.NotAvailableValue;
            }
        }
 
        [RelayCommand]
        private static async Task Copy(object Item)
        {
            try
            {
                if (Item is string Label)
                    await Clipboard.SetTextAsync(Label);
                else
                    await Clipboard.SetTextAsync(Item?.ToString() ?? string.Empty);
 
                await ServiceRef.UiService.DisplayAlert(
                    ServiceRef.Localizer[nameof(AppResources.SuccessTitle)],
                    ServiceRef.Localizer[nameof(AppResources.TagValueCopiedToClipboard)]);
            }
            catch (Exception ex)
            {
                ServiceRef.LogService.LogException(ex);
                await ServiceRef.UiService.DisplayException(ex);
            }
        }
    }
}