private async Task AddContact()
{
this.ReceiverAdress = this.ReceiverAdress?.Trim();
if (!this.AlreadyClicke &&
IotaHelper.CorrectSeedAdressChecker(this.ReceiverAdress) &&
this.ReceiverAdress?.Length == 81 &&
this.ReceiverAdress != this.user.PublicKeyAddress)
{
this.IsBusy = true;
this.AlreadyClicke = true;
try
{
// get information from receiver adress
var trytes = this.user.TangleMessenger.GetMessages(this.ReceiverAdress);
var contact = IotaHelper.FilterRequestInfos(trytes);
if (contact?.PublicNtruKey != null && contact.ContactAdress != null)
{
// faster than generating adresses
var requestContact = new Contact()
{
ChatAdress = Seed.Random().ToString(),
Name = this.user.Name,
ImageUrl = this.user.ImageUrl,
ContactAdress = this.user.ApprovedAddress,
Request = true,
Rejected = false,
PublicNtruKey = null,
PublicKeyAdress = this.user.PublicKeyAddress
};
// encrypt contact request? too much infos needed here for one message needs to get request adress plus chatadress
await this.user.TangleMessenger.SendJsonMessageAsync(new SentDataWrapper <Contact> {
Data = requestContact, Sender = this.user.Name
}, contact.ContactAdress);
}
}
catch
{
this.DisplayInvalidAdressPrompt();
}
}
else
{
this.DisplayInvalidAdressPrompt();
}
this.IsBusy = false;
this.AlreadyClicke = false;
}
public User GetUser()
{
var storedSeed = new Seed(CrossSecureStorage.Current.GetValue(SeedKey));
var user = new User()
{
Seed = storedSeed,
OwnDataAdress = CrossSecureStorage.Current.GetValue(OwnDataAdressKey),
RequestAddress = CrossSecureStorage.Current.GetValue(RequestAddressKey),
ApprovedAddress = CrossSecureStorage.Current.GetValue(ApprovedAddressKey),
PublicKeyAddress = CrossSecureStorage.Current.GetValue(PublicKeyAddressKey),
TangleMessenger = new TangleMessengerFactory().Create(storedSeed)
};
var ownDataWrappers = user.TangleMessenger.GetMessages(user.OwnDataAdress);
user = IotaHelper.UpdateUserWithTangleInfos(user, ownDataWrappers);
return(user);
}
public ChatViewModel(Contact contact, User user)
{
this.ntruKex = new NtruKex();
this.profileImageUrl = contact.ImageUrl;
this.user = user;
this.contact = contact;
var trytes = this.user.TangleMessenger.GetMessages(this.contact.PublicKeyAdress);
var contactInfos = IotaHelper.FilterRequestInfos(trytes);
contact.PublicNtruKey = contactInfos.PublicNtruKey;
this.Messages = new ObservableCollection <MessageViewModel>();
this.GetMessagesAsync(this.Messages);
this.OutGoingText = null;
this.SendCommand = new Command(async() => { await this.SendMessage(); });
}
