QrXmppViewModel.cs

using CommunityToolkit.Mvvm.ComponentModel;
 
namespace NeuroAccessMaui.UI.Pages
{
    public abstract partial class QrXmppViewModel : XmppViewModel, ILinkableView
    {
        protected QrXmppViewModel()
            : base()
        {
        }
 
        public void GenerateQrCode(string Uri)
        {
            if (this.QrCodeWidth == 0 || this.QrCodeHeight == 0)
            {
                this.QrCodeWidth = Constants.QrCode.DefaultImageWidth;
                this.QrCodeHeight = Constants.QrCode.DefaultImageHeight;
            }
 
            if (this.QrResolutionScale == 0)
                this.QrResolutionScale = Constants.QrCode.DefaultResolutionScale;
 
            byte[] Bin = Services.UI.QR.QrCode.GeneratePng(Uri, this.QrCodeWidth * this.QrResolutionScale, this.QrCodeHeight * this.QrResolutionScale);
            this.QrCode = ImageSource.FromStream(() => new MemoryStream(Bin));
            this.QrCodeBin = Bin;
            this.QrCodeContentType = Constants.MimeTypes.Png;
            this.QrCodeUri = Uri;
            this.HasQrCode = true;
        }
 
        public void RemoveQrCode()
        {
            this.QrCode = null;
            this.QrCodeBin = null;
            this.QrCodeContentType = null;
            this.QrCodeUri = null;
            this.HasQrCode = false;
        }
 
        #region Properties
 
        [ObservableProperty]
        private ImageSource? qrCode;
 
        [ObservableProperty]
        private bool hasQrCode;
 
        [ObservableProperty]
        private string? qrCodeUri;
 
        [ObservableProperty]
        private int qrCodeWidth;
 
        [ObservableProperty]
        private int qrCodeHeight;
 
        [ObservableProperty]
        private int qrResolutionScale;
 
        [ObservableProperty]
        private byte[]? qrCodeBin;
 
        [ObservableProperty]
        private string? qrCodeContentType;
 
 
 
        #endregion
 
        #region ILinkableView
 
        public virtual bool IsLinkable => this.HasQrCode;
 
        public virtual bool EncodeAppLinks => true;
 
        public virtual string? Link => this.QrCodeUri;
 
        public abstract Task<string> Title { get; }
 
        public virtual bool HasMedia => this.HasQrCode;
 
        public virtual byte[]? Media => this.QrCodeBin;
 
        public virtual string? MediaContentType => this.QrCodeContentType;
 
        #endregion
    }
}