feat(auth): add support for multiprofile custom accounts

launcher/CMakeLists.txt

@@ -121,6 +121,8 @@ set(NET_SOURCES
     net/Download.h
     net/FileSink.cpp
     net/FileSink.h
+    net/Head.cpp
+    net/Head.h
     net/HttpMetaCache.cpp
     net/HttpMetaCache.h
     net/MetaCacheSink.cpp

launcher/minecraft/auth/custom/steps/CustomAuthStep.cpp

@@ -18,6 +18,8 @@
 
 #include "CustomAuthStep.h"
 
+#include <QInputDialog>
+
 #include "Application.h"
 #include "Logging.h"
 #include "net/NetUtils.h"
@@ -77,7 +79,11 @@ QString CustomAuthStep::requestTemplate()
 {
     "accessToken": "%1",
     "clientToken": "%2",
-    "requestUser": false
+    "requestUser": false,
+    "selectedProfile": {
+        "id": "%3",
+        "name": "%4"
+    }
 }
 )XXX";
     }
@@ -88,7 +94,8 @@ QString CustomAuthStep::fillRequest()
     if (m_action == AuthFlow::Action::Login) {
         return requestTemplate().arg(m_data->accountLogin, m_password, clientID());
     } else {
-        return requestTemplate().arg(m_data->yggdrasilToken.token, m_data->clientID);
+        return requestTemplate().arg(m_data->yggdrasilToken.token, m_data->clientID, m_data->minecraftProfile.id,
+                                     m_data->minecraftProfile.name);
     }
 }
 
@@ -106,9 +113,43 @@ bool CustomAuthStep::parseResponse()
 
     m_data->clientID = jsonResponse["clientToken"].toString();
 
-    auto profile = jsonResponse["selectedProfile"].toObject();
-    m_data->minecraftProfile.id = profile["id"].toString();
-    m_data->minecraftProfile.name = profile["name"].toString();
+    if (!jsonResponse["selectedProfile"].isNull()) {
+        auto profile = jsonResponse["selectedProfile"].toObject();
+        m_data->minecraftProfile.id = profile["id"].toString();
+        m_data->minecraftProfile.name = profile["name"].toString();
+    }
+
+    const QJsonArray profiles = jsonResponse["availableProfiles"].toArray();
+    if (profiles.size() > 1) {
+        const auto profileName = [](const auto& profile) {
+            auto obj = profile.toObject();
+            return obj["name"].toString();
+        };
+
+        QStringList list;
+        std::ranges::transform(profiles, std::back_inserter(list), profileName);
+
+        bool ok = false;
+        QString selectedProfileName =
+            QInputDialog::getItem(nullptr, tr("Select profile"), tr("Select profile for this account"), list, 0, false, &ok);
+
+        if (!ok) {
+            return false;
+        }
+
+        const auto it = std::ranges::find(profiles, selectedProfileName, profileName);
+        if (it != profiles.end()) {
+            auto profileObj = it->toObject();
+            m_data->minecraftProfile = MinecraftProfile{ .id = profileObj["id"].toString(), .name = profileObj["name"].toString() };
+        } else {
+            return false;
+        }
+    }
+
+    if (profiles.size() == 1 && m_data->minecraftProfile.id.isEmpty()) {
+        auto profileObj = profiles.first().toObject();
+        m_data->minecraftProfile = MinecraftProfile{ .id = profileObj["id"].toString(), .name = profileObj["name"].toString() };
+    }
 
     return true;
 }
@@ -121,4 +162,4 @@ void CustomAuthStep::onRequestDone()
         return;
     }
     emit finished(AccountTaskState::STATE_WORKING, tr("Got authorization for %1 account").arg(authType()));
-}
+}

launcher/net/Head.cpp

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Freesm Launcher - Minecraft Launcher
+ *  Copyright (C) 2026 so5iso4ka <[email protected]>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <memory>
+
+#include "ByteArraySink.h"
+
+#include "Head.h"
+
+
+Net::Head::Ptr Net::Head::makeHeaderPairs(QUrl url, Options options)
+{
+    auto dl = makeShared<Head>();
+    dl->m_url = url;
+    dl->setObjectName(QString("HEAD:") + url.toString());
+    dl->m_options = options;
+    dl->m_sink = std::make_unique<ByteArraySink>(std::make_shared<QByteArray>());
+    return dl;
+}
+
+QNetworkReply* Net::Head::getReply(QNetworkRequest& request)
+{
+    return m_network->head(request);
+}

launcher/net/Head.h

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Freesm Launcher - Minecraft Launcher
+ *  Copyright (C) 2026 so5iso4ka <[email protected]>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "net/NetRequest.h"
+
+namespace Net {
+class Head : public NetRequest {
+    Q_OBJECT
+   public:
+    using Ptr = shared_qobject_ptr<Head>;
+    Head() { logCat = taskDownloadLogC; }
+
+    static Ptr makeHeaderPairs(QUrl url, Options options = Option::NoOptions);
+
+   protected:
+    QNetworkReply* getReply(QNetworkRequest& request) override;
+};
+}  // namespace Net

launcher/ui/dialogs/CustomLoginDialog.cpp

@@ -61,9 +61,7 @@ void CustomLoginDialog::accept()
     setUserInputsEnabled(false);
     ui->progressBar->setVisible(true);
 
-    m_response = std::make_shared<QByteArray>();
-
-    m_requestTask = Net::Download::makeByteArray(url, m_response);
+    m_requestTask = Net::Head::makeHeaderPairs(url);
     m_requestTask->setNetwork(APPLICATION->network());
 
     connect(m_requestTask.get(), &Task::finished, this, &CustomLoginDialog::onUrlResolving);

launcher/ui/dialogs/CustomLoginDialog.h

@@ -18,7 +18,7 @@
 #include <QDialog>
 
 #include "minecraft/auth/custom/CustomAccount.h"
-#include "net/Download.h"
+#include "net/Head.h"
 #include "tasks/Task.h"
 
 namespace Ui {
@@ -56,6 +56,5 @@ class CustomLoginDialog : public QDialog {
     Ui::CustomLoginDialog* ui;
     CustomAccountPtr m_account;
     Task::Ptr m_loginTask;
-    Net::Download::Ptr m_requestTask;
-    std::shared_ptr<QByteArray> m_response;
+    Net::Head::Ptr m_requestTask;
 };