private void SendMessage(Models.Message message)
{
//sent messages to the server
string apiUrl = "https://ycandgap.me/api_server2.php";
string apiMethod = "sendMessages";
//Login_Request has two properties:username and password
Login_Request mySendMessage_Request = new Login_Request();
//get the login username from previow login page.
mySendMessage_Request.message = message;
// make http post request
string response = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(mySendMessage_Request) }
});
}
private void PreviousLoginActivity()
{
//Send the login username and password to the server and get response
string apiUrl = "https://ycandgap.me/api_server2.php";
string apiMethod = "loginUser";
//Login_Request has two properties:username and password
Login_Request myLogin_Request = new Login_Request();
myLogin_Request.Username = username.Text;
myLogin_Request.Password = password.Text.GetHashCode();
// make http post request
string response = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(myLogin_Request) }
});
// decode json string to dto object
API_Response r = JsonConvert.DeserializeObject<API_Response>(response);
// check response
if (!r.IsError && r.ResponseData != null)
{
//**if login successfully, go to FriendsList page with the username
ISharedPreferences sharedPref = PreferenceManager.GetDefaultSharedPreferences(this);
ISharedPreferencesEditor editor = sharedPref.Edit();
editor.PutString("RegistrationId", r.ResponseData);
editor.Apply();
var friendsActivity = new Intent(this, typeof(FriendsActivity));
friendsActivity.PutExtra("UserRegisterID", r.ResponseData);
StartActivity(typeof(FriendsActivity));
}
else
{
//if login fails, pop up an alert message. Wrong username or password or a new user
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
dialogBuilder.SetMessage(r.ErrorMessage);
//dialogBuilder.SetPositiveButton("Ok", null);
dialogBuilder.Show();
}
}
public Models.Message[] GetMessages(ISharedPreferences sharedPref, User SelectedFriend, SessionStore sessionStore,
PreKeyStore preKeyStore, SignedPreKeyStore signedPreKeyStore, IdentityKeyStore identityStore, SignalProtocolAddress SelectedFriendAddress)
{
// send the server the user name
// server side does the selection and return the messages and store it in a message array.
//Send the login username and password to the server and get response
string apiUrl = "https://ycandgap.me/api_server2.php";
string apiMethod = "getMessage";
//Login_Request has two properties:username and password
Login_Request myLogin_Request = new Login_Request();
Models.Message recieveMessage = new Models.Message();
//get the login username from previow login page.
recieveMessage.MessageReceiverRegisID = Convert.ToUInt32(sharedPref.GetString("RegistrationId", string.Empty));
recieveMessage.MessageSenderRegisID = SelectedFriend.RegisterationID;
myLogin_Request.message = recieveMessage;
UserID = myLogin_Request.RegistrationID;
// make http post request
string response = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(myLogin_Request) }
});
// decode json string to dto object
API_Response2 r = JsonConvert.DeserializeObject <API_Response2>(response);
// check response
if (r != null)
{
if (!r.IsError && !string.IsNullOrEmpty(r.MessageText))
{
SessionCipher sessionCipher = new SessionCipher(sessionStore, preKeyStore, signedPreKeyStore, identityStore, SelectedFriendAddress);
byte[] decipherMessage;
if (!sessionStore.ContainsSession(SelectedFriendAddress))
{
decipherMessage = sessionCipher.decrypt(new PreKeySignalMessage((JsonConvert.DeserializeObject <byte[]>(r.MessageText))));
}
else
{
decipherMessage = sessionCipher.decrypt(new SignalMessage((JsonConvert.DeserializeObject <byte[]>(r.MessageText))));
}
string checkMessage = Encoding.UTF8.GetString(decipherMessage);
SelectedFriend.SelectedUserMessages.Add(new Models.Message
{
MessageID = r.MessageID,
MessageSenderRegisID = r.MessageSenderRegisID,
MessageReceiverRegisID = r.MessageReceiverRegisID,
MessageText = checkMessage,
MessageTimestamp = r.MessageTimestamp
});
return(SelectedFriend.SelectedUserMessages.ToArray());
}
else
{
//if login fails, pop up an alert message. Wrong username or password or a new user
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
if (!string.IsNullOrEmpty(r.ErrorMessage))
{
dialogBuilder.SetMessage(r.ErrorMessage);
}
else
{
dialogBuilder.SetMessage("No new messages");
}
//dialogBuilder.SetPositiveButton("Ok", null);
dialogBuilder.Show();
return(null);
}
}
else
{
if (!sessionStore.ContainsSession(SelectedFriendAddress))
{
// Instantiate a SessionBuilder for a remote recipientId + deviceId tuple.
SessionBuilder sessionBuilder = new SessionBuilder(sessionStore, preKeyStore, signedPreKeyStore,
identityStore, SelectedFriendAddress);
RetrievedPreKey preKeyPublic = RetrieveSelectedFriendPublicPreKey(SelectedFriend);
IdentityKey SelectedFriendSignedPreKey = new IdentityKey(JsonConvert.DeserializeObject <byte[]>(SelectedFriend.SignedPreKey), 0);
PreKeyBundle retrievedPreKey = new PreKeyBundle(SelectedFriend.RegisterationID, 1, preKeyPublic.PrekeyID, preKeyPublic.PublicPreKey.getPublicKey()
, SelectedFriend.SignedPreKeyID, SelectedFriendSignedPreKey.getPublicKey(), JsonConvert.DeserializeObject <byte[]>(SelectedFriend.SignedPreKeySignature)
, new IdentityKey(JsonConvert.DeserializeObject <byte[]>(SelectedFriend.IdentityKey), 0));
// Build a session with a PreKey retrieved from the server.
sessionBuilder.process(retrievedPreKey);
}
return(null);
}
}
// Retrieve a list of conversations
private User[] GetFriends()
{
// send the server the user name
// server side does the selection and return the other users' names/id and store it in a user array.
//Send the login username and password to the server and get response
string apiUrl = "https://ycandgap.me/api_server2.php";
string apiMethod = "getFriends";
//Login_Request has two properties:username and password
Login_Request myLogin_Request = new Login_Request();
//get the login username from previow login page.
ISharedPreferences sharedPref = PreferenceManager.GetDefaultSharedPreferences(this);
myLogin_Request.RegistrationID = Convert.ToUInt32(sharedPref.GetString("RegistrationId", string.Empty));
// make http post request
string response = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(myLogin_Request) }
});
// decode json string to dto object
API_Response1 r = JsonConvert.DeserializeObject <API_Response1>(response);
// check response
if (r != null)
{
if (!r.IsError)
{
if (r.Array != null)
{
MessagesActivity m = new MessagesActivity();
List <User> friends = new List <User>();
string lastmessage = string.Empty;
//(m.GetMessages(sharedPref) != null) ? m.GetMessages(sharedPref).FirstOrDefault().MessageText : string.Empty;
foreach (Friend friend in r.Array)
{
friends.Add(new User()
{
IdentityKey = friend.IdentityKey,
LastMessage = lastmessage,
RegisterationID = Convert.ToUInt32(friend.RegistrationID),
SignedPreKeyID = Convert.ToUInt32(friend.SignedPreKeyID),
SignedPreKeySignature = friend.SignedPreKeySignature,
SignedPreKey = friend.SignedPreKey,
Username = friend.Username
});
}
return(friends.ToArray());
}
else
{
return(null);
}
}
else
{
//if login fails, pop up an alert message. Wrong username or password or a new user
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
dialogBuilder.SetMessage(r.ErrorMessage);
//dialogBuilder.SetPositiveButton("Ok", null);
dialogBuilder.Show();
return(null);
}
}
else
{
return(null);
}
}
private void RequestRegister(uint registrationId, IdentityKeyPair identityKeyPair, SignedPreKeyRecord signedPreKey, List <PreKeyRecord> preKeys)
{
//Send the login username and password to the server and get response
string apiUrl = "https://ycandgap.me/api_server2.php";
string apiMethod = "registerUser";
// Login_Request has two properties: username and password
Login_Request myLogin_Request = new Login_Request();
myLogin_Request.Username = username.Text;
myLogin_Request.Password = password.Text.GetHashCode();
myLogin_Request.RegistrationID = registrationId;
myLogin_Request.PublicIdentityKey = JsonConvert.SerializeObject(identityKeyPair.getPublicKey().serialize());
myLogin_Request.PublicSignedPreKeyID = signedPreKey.getId();
myLogin_Request.PublicSignedPreKeySignature = JsonConvert.SerializeObject(signedPreKey.getSignature());
myLogin_Request.PublicSignedPreKey = JsonConvert.SerializeObject(signedPreKey.getKeyPair().getPublicKey().serialize());
// Save in local Database
ISharedPreferences sharedprefs = PreferenceManager.GetDefaultSharedPreferences(this);
ISharedPreferencesEditor editor = sharedprefs.Edit();
// Store identityKeyPair somewhere durable and safe.
editor.PutString("IdentityKeyPair", JsonConvert.SerializeObject(identityKeyPair.serialize()));
editor.PutString("SignedPreKey", JsonConvert.SerializeObject(signedPreKey.serialize()));
editor.PutString("Username", username.Text);
editor.PutInt("Password", password.Text.GetHashCode());
// Store registrationId somewhere durable and safe.
editor.PutString("RegistrationId", registrationId.ToString());
editor.Apply();
// make http post request
string response = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(myLogin_Request) }
});
// decode json string to dto object
API_Response r = JsonConvert.DeserializeObject <API_Response>(response);
if (r != null)
{
if (!r.IsError)
{
foreach (PreKeyRecord preKey in preKeys)
{
Prekey_Request preKey_Request = new Prekey_Request();
preKey_Request.PublicSignedPreKeyID = signedPreKey.getId();
preKey_Request.PublicPreKeyID = preKey.getId();
preKey_Request.PublicPreKey = JsonConvert.SerializeObject(preKey.getKeyPair().getPublicKey().serialize());
apiMethod = "storePreKeys";
// make http post request
string preKeyResponse = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(preKey_Request) }
});
// decode json string to dto object
API_Response preKeyR = JsonConvert.DeserializeObject <API_Response>(preKeyResponse);
if (preKeyR == null)
{
break;
}
}
}
}
}