Handle empty matrix ID (regression from 9de1ec1)

fixes #259

include/LoginPage.h

@@ -48,7 +48,7 @@ protected:
 
 public slots:
         // Displays errors produced during the login.
-        void loginError(QString error_message);
+        void loginError(QString msg) { error_label_->setText(msg); }
 
 private slots:
         // Callback for the back button.

src/LoginPage.cc

@@ -152,39 +152,22 @@ LoginPage::LoginPage(QSharedPointer<MatrixClient> client, QWidget *parent)
 }
 
 void
-LoginPage::loginError(QString error)
+LoginPage::onMatrixIdEntered()
 {
-        error_label_->setText(error);
-}
+        error_label_->setText("");
 
-bool
-LoginPage::isMatrixIdValid()
-{
-        auto matrix_id = matrixid_input_->text();
+        User user;
 
         try {
-                parse<User>(matrix_id.toStdString());
-                return true;
+                user = parse<User>(matrixid_input_->text().toStdString());
         } catch (const std::exception &e) {
-                return false;
+                return loginError("You have entered an invalid Matrix ID  e.g @joe:matrix.org");
         }
 
-        return false;
-}
-
-void
-LoginPage::onMatrixIdEntered()
-{
-        error_label_->setText("");
-
-        if (!isMatrixIdValid()) {
-                loginError("You have entered an invalid Matrix ID  e.g @joe:matrix.org");
-                return;
-        } else if (password_input_->text().isEmpty()) {
-                loginError(tr("Empty password"));
-        }
+        if (password_input_->text().isEmpty())
+                return loginError(tr("Empty password"));
 
-        QString homeServer = matrixid_input_->text().split(":").at(1);
+        QString homeServer = QString::fromStdString(user.hostname());
         if (homeServer != inferredServerAddress_) {
                 serverInput_->hide();
                 serverLayout_->removeWidget(errorIcon_);
@@ -251,17 +234,21 @@ LoginPage::onLoginButtonClicked()
 {
         error_label_->setText("");
 
-        if (!isMatrixIdValid()) {
-                loginError("You have entered an invalid Matrix ID  e.g @joe:matrix.org");
-        } else if (password_input_->text().isEmpty()) {
-                loginError("Empty password");
-        } else {
-                QString user     = matrixid_input_->text().split(":").at(0).split("@").at(1);
-                QString password = password_input_->text();
-                client_->setServer(serverInput_->text());
-                client_->login(user, password);
-                emit loggingIn();
+        User user;
+
+        try {
+                user = parse<User>(matrixid_input_->text().toStdString());
+        } catch (const std::exception &e) {
+                return loginError("You have entered an invalid Matrix ID  e.g @joe:matrix.org");
         }
+
+        if (password_input_->text().isEmpty())
+                return loginError(tr("Empty password"));
+
+        client_->setServer(serverInput_->text());
+        client_->login(QString::fromStdString(user.localpart()), password_input_->text());
+
+        emit loggingIn();
 }
 
 void

src/MatrixClient.cc

@@ -123,11 +123,6 @@ MatrixClient::login(const QString &username, const QString &password) noexcept
                 int status_code =
                   reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
 
-                if (reply->error()) {
-                        emit loginError(reply->errorString());
-                        return;
-                }
-
                 if (status_code == 403) {
                         emit loginError(tr("Wrong username or password"));
                         return;
@@ -144,6 +139,11 @@ MatrixClient::login(const QString &username, const QString &password) noexcept
                         return;
                 }
 
+                if (reply->error()) {
+                        emit loginError(reply->errorString());
+                        return;
+                }
+
                 try {
                         mtx::responses::Login login =
                           nlohmann::json::parse(reply->readAll().data());