public bool CanExecuteSaveAddedContactCommand()
{
if (string.IsNullOrEmpty(this.AddedContactId))
{
this.CurrentError = "The XDS ID is required.";
return(false);
}
var regex = new Regex("^[A-Za-z0-9]+$");
if (!regex.IsMatch(this.AddedContactId))
{
this.CurrentError = "Use only latin letters and numbers";
return(false);
}
if (this.AddedContactId.Length < 13)
{
this.CurrentError = "This XDS ID is too short!";
return(false);
}
if (this.AddedContactId.Length > 14)
{
this.CurrentError = "This XDS ID is too long!";
return(false);
}
// TODO: Verify Base64 Chars
if (this.contactListManager.Contacts.Count(c => c.ChatId == this.AddedContactId) > 0)
{
this.CurrentError = "This contact already exists.";
return(false);
}
if (this.profileViewModel.ChatId == this.AddedContactId)
{
this.CurrentError = "You cannot add yourself.";
return(false);
}
try
{
ChatId.DecodeChatId(this.AddedContactId);
}
catch (InvalidDataException ae)
{
this.CurrentError = ae.Message;
return(false);
}
this.CurrentError = "Looks good!";
return(true);
}
