NeuroAccessLink.cs

using NeuroAccessMaui.Resources.Languages;
using NeuroAccessMaui.Services;
using Waher.Persistence;
using Waher.Runtime.Inventory;
using Waher.Script;
using Waher.Security.JWT;
 
namespace NeuroAccessMaui.Links
{
    public class NeuroAccessLink : ILinkOpener
    {
        public NeuroAccessLink()
        {
        }
 
        public Grade Supports(Uri Link)
        {
            return Link.Scheme.Equals(Constants.UriSchemes.NeuroAccess, StringComparison.OrdinalIgnoreCase) ? Grade.Ok : Grade.NotAtAll;
        }
 
        public async Task<bool> TryOpenLink(Uri Link, bool ShowErrorIfUnable)
        {
            string? Token = Constants.UriSchemes.RemoveScheme(Link.OriginalString);
            if (string.IsNullOrEmpty(Token))
                return false;
 
            JwtToken? Parsed = await ServiceRef.CryptoService.ParseAndValidateJwtToken(Token);
            if (Parsed is null)
                return false;
 
            if (!Parsed.TryGetClaim("cmd", out object Obj) || Obj is not string Command ||
                !Parsed.TryGetClaim(JwtClaims.ClientId, out Obj) || Obj is not string ClientId ||
                ClientId != ServiceRef.CryptoService.DeviceID ||
                !Parsed.TryGetClaim(JwtClaims.Issuer, out Obj) || Obj is not string Issuer ||
                Issuer != ServiceRef.CryptoService.DeviceID ||
                !Parsed.TryGetClaim(JwtClaims.Subject, out Obj) || Obj is not string Subject ||
                Subject != ServiceRef.XmppService.BareJid)
            {
                return false;
            }
 
            switch (Command)
            {
                case "bes":  // Buy eDaler Successful
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId ||
                        !Parsed.TryGetClaim("amt", out object Amount) ||
                        !Parsed.TryGetClaim("cur", out Obj) || Obj is not string Currency)
                    {
                        return false;
                    }
 
                    decimal AmountDec;
 
                    try
                    {
                        AmountDec = Expression.ToDecimal(Amount);
                    }
                    catch (Exception)
                    {
                        return false;
                    }
 
                    ServiceRef.XmppService.BuyEDalerCompleted(TransactionId, AmountDec, Currency);
                    return true;
 
                case "bef":  // Buy eDaler Failed
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId2)
                        return false;
 
                    ServiceRef.XmppService.BuyEDalerFailed(TransactionId2, ServiceRef.Localizer[nameof(AppResources.PaymentFailed)]);
                    return true;
 
                case "bec":  // Buy eDaler Cancelled
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId3)
                        return false;
 
                    ServiceRef.XmppService.BuyEDalerFailed(TransactionId3, ServiceRef.Localizer[nameof(AppResources.PaymentCancelled)]);
                    return true;
 
                case "ses":  // Sell eDaler Successful
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId4 ||
                        !Parsed.TryGetClaim("amt", out Amount) ||
                        !Parsed.TryGetClaim("cur", out Obj) || Obj is not string Currency4)
                    {
                        return false;
                    }
 
                    try
                    {
                        AmountDec = Expression.ToDecimal(Amount);
                    }
                    catch (Exception)
                    {
                        return false;
                    }
 
                    ServiceRef.XmppService.SellEDalerCompleted(TransactionId4, AmountDec, Currency4);
                    return true;
 
                case "sef":  // Sell eDaler Failed
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId5)
                        return false;
 
                    ServiceRef.XmppService.SellEDalerFailed(TransactionId5, ServiceRef.Localizer[nameof(AppResources.PaymentFailed)]);
                    return true;
 
                case "sec":  // Sell eDaler Cancelled
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId6)
                        return false;
 
                    ServiceRef.XmppService.SellEDalerFailed(TransactionId6, ServiceRef.Localizer[nameof(AppResources.PaymentCancelled)]);
                    return true;
 
                case "beos":  // Buy eDaler Get Options Successful
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId7)
                        return false;
 
                    ServiceRef.XmppService.BuyEDalerGetOptionsCompleted(TransactionId7, []);
                    return true;
 
                case "beof":  // Buy eDaler Get Options Failed
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId8)
                        return false;
 
                    ServiceRef.XmppService.BuyEDalerGetOptionsFailed(TransactionId8, ServiceRef.Localizer[nameof(AppResources.UnableToGetOptions)]);
                    return true;
 
                case "beoc":  // Buy eDaler Get Options Cancelled
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId9)
                        return false;
 
                    ServiceRef.XmppService.BuyEDalerGetOptionsFailed(TransactionId9, ServiceRef.Localizer[nameof(AppResources.GettingOptionsCancelled)]);
                    return true;
 
                case "seos":  // Sell eDaler Get Options Successful
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId10)
                        return false;
 
                    ServiceRef.XmppService.SellEDalerGetOptionsCompleted(TransactionId10, []);
                    return true;
 
                case "seof":  // Sell eDaler Get Options Failed
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId11)
                        return false;
 
                    ServiceRef.XmppService.SellEDalerGetOptionsFailed(TransactionId11, ServiceRef.Localizer[nameof(AppResources.UnableToGetOptions)]);
                    return true;
 
                case "seoc":  // Sell eDaler Get Options Cancelled
                    if (!Parsed.TryGetClaim("tid", out Obj) || Obj is not string TransactionId12)
                        return false;
 
                    ServiceRef.XmppService.SellEDalerGetOptionsFailed(TransactionId12, ServiceRef.Localizer[nameof(AppResources.GettingOptionsCancelled)]);
                    return true;
 
                default:
                    return false;
            }
        }
    }
}