Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

git-subtree-dir: meshmc
git-subtree-mainline: 934382c8a1ce738589dee9ee0f14e1cec812770e
git-subtree-split: fad6a1066616b69d7f5fef01178efdf014c59537

1 files changed, 423 insertions, 0 deletions

diff --git a/meshmc/launcher/LaunchController.cpp b/meshmc/launcher/LaunchController.cpp
new file mode 100644
index 0000000000..41e4152d65
--- /dev/null
+++ b/meshmc/launcher/LaunchController.cpp
@@ -0,0 +1,423 @@
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   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, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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 "LaunchController.h"
+#include "minecraft/auth/AccountList.h"
+#include "Application.h"
+
+#include "ui/MainWindow.h"
+#include "ui/InstanceWindow.h"
+#include "ui/dialogs/CustomMessageBox.h"
+#include "ui/dialogs/ProfileSelectDialog.h"
+#include "ui/dialogs/ProgressDialog.h"
+#include "ui/dialogs/EditAccountDialog.h"
+#include "ui/dialogs/ProfileSetupDialog.h"
+
+#include <QLineEdit>
+#include <QInputDialog>
+#include <QStringList>
+#include <QHostInfo>
+#include <QList>
+#include <QHostAddress>
+#include <QPushButton>
+
+#include "BuildConfig.h"
+#include "JavaCommon.h"
+#include "tasks/Task.h"
+#include "minecraft/auth/AccountTask.h"
+#include "launch/steps/TextPrint.h"
+
+LaunchController::LaunchController(QObject* parent) : Task(parent) {}
+
+void LaunchController::executeTask()
+{
+	if (!m_instance) {
+		emitFailed(tr("No instance specified!"));
+		return;
+	}
+
+	JavaCommon::checkJVMArgs(m_instance->settings()->get("JvmArgs").toString(),
+							 m_parentWidget);
+
+	login();
+}
+
+void LaunchController::decideAccount()
+{
+	if (m_accountToUse) {
+		return;
+	}
+
+	// Find an account to use.
+	auto accounts = APPLICATION->accounts();
+	if (accounts->count() <= 0) {
+		// Tell the user they need to log in at least one account in order to
+		// play.
+		auto reply =
+			CustomMessageBox::selectable(
+				m_parentWidget, tr("No Accounts"),
+				tr("In order to play Minecraft, you must have at least one "
+				   "Microsoft "
+				   "account logged in."
+				   "Would you like to open the account manager to add an "
+				   "account now?"),
+				QMessageBox::Information, QMessageBox::Yes | QMessageBox::No)
+				->exec();
+
+		if (reply == QMessageBox::Yes) {
+			// Open the account manager.
+			APPLICATION->ShowGlobalSettings(m_parentWidget, "accounts");
+		}
+	}
+
+	m_accountToUse = accounts->defaultAccount();
+	if (!m_accountToUse) {
+		// If no default account is set, ask the user which one to use.
+		ProfileSelectDialog selectDialog(
+			tr("Which account would you like to use?"),
+			ProfileSelectDialog::GlobalDefaultCheckbox, m_parentWidget);
+
+		selectDialog.exec();
+
+		// Launch the instance with the selected account.
+		m_accountToUse = selectDialog.selectedAccount();
+
+		// If the user said to use the account as default, do that.
+		if (selectDialog.useAsGlobalDefault() && m_accountToUse) {
+			accounts->setDefaultAccount(m_accountToUse);
+		}
+	}
+}
+
+void LaunchController::login()
+{
+	decideAccount();
+
+	// if no account is selected, we bail
+	if (!m_accountToUse) {
+		emitFailed(tr("No account selected for launch."));
+		return;
+	}
+
+	// we try empty password first :)
+	QString password;
+	// we loop until the user succeeds in logging in or gives up
+	bool tryagain = true;
+	// the failure. the default failure.
+	const QString needLoginAgain =
+		tr("Your account is currently not logged in. Please enter your "
+		   "password to log in again. <br /> <br /> This could be caused by a "
+		   "password change.");
+	QString failReason = needLoginAgain;
+
+	while (tryagain) {
+		m_session = std::make_shared<AuthSession>();
+		m_session->wants_online = m_online;
+		m_accountToUse->fillSession(m_session);
+
+		switch (m_accountToUse->accountState()) {
+			case AccountState::Offline: {
+				m_session->wants_online = false;
+				// NOTE: fallthrough is intentional
+			}
+			case AccountState::Online: {
+				if (!m_session->wants_online) {
+					// we ask the user for a player name
+					bool ok = false;
+					QString usedname = m_session->player_name;
+					QString name = QInputDialog::getText(
+						m_parentWidget, tr("Player name"),
+						tr("Choose your offline mode player name."),
+						QLineEdit::Normal, m_session->player_name, &ok);
+					if (!ok) {
+						tryagain = false;
+						break;
+					}
+					if (name.length()) {
+						usedname = name;
+					}
+					m_session->MakeOffline(usedname);
+					// offline flavored game from here :3
+				}
+				if (m_accountToUse->ownsMinecraft()) {
+					if (!m_accountToUse->hasProfile()) {
+						// Now handle setting up a profile name here...
+						ProfileSetupDialog dialog(m_accountToUse,
+												  m_parentWidget);
+						if (dialog.exec() == QDialog::Accepted) {
+							tryagain = true;
+							continue;
+						} else {
+							emitFailed(tr("Received undetermined session "
+										  "status during login."));
+							return;
+						}
+					}
+					// we own Minecraft, there is a profile, it's all ready to
+					// go!
+					launchInstance();
+					return;
+				} else {
+					// play demo ?
+					QMessageBox box(m_parentWidget);
+					box.setWindowTitle(tr("Play demo?"));
+					box.setText(tr("This account does not own Minecraft.\nYou "
+								   "need to purchase the game first to play "
+								   "it.\n\nDo you want to play the demo?"));
+					box.setIcon(QMessageBox::Warning);
+					auto demoButton = box.addButton(
+						tr("Play Demo"), QMessageBox::ButtonRole::YesRole);
+					auto cancelButton = box.addButton(
+						tr("Cancel"), QMessageBox::ButtonRole::NoRole);
+					box.setDefaultButton(cancelButton);
+
+					box.exec();
+					if (box.clickedButton() == demoButton) {
+						// play demo here
+						m_session->MakeDemo();
+						launchInstance();
+					} else {
+						emitFailed(tr("Launch cancelled - account does not own "
+									  "Minecraft."));
+					}
+				}
+				return;
+			}
+			case AccountState::Errored:
+				// This means some sort of soft error that we can fix with a
+				// refresh ... so let's refresh.
+			case AccountState::Unchecked: {
+				m_accountToUse->refresh();
+				// NOTE: fallthrough intentional
+			}
+			case AccountState::Working: {
+				// refresh is in progress, we need to wait for it to finish to
+				// proceed.
+				ProgressDialog progDialog(m_parentWidget);
+				if (m_online) {
+					progDialog.setSkipButton(true, tr("Play Offline"));
+				}
+				auto task = m_accountToUse->currentTask();
+				progDialog.execWithTask(task.get());
+				continue;
+			}
+			// FIXME: this is missing - the meaning is that the account is
+			// queued for refresh and we should wait for that
+			/*
+			case AccountState::Queued: {
+				return;
+			}
+			*/
+			case AccountState::Expired: {
+				auto errorString = tr("The account has expired and needs to be "
+									  "logged into manually again.");
+				QMessageBox::warning(m_parentWidget,
+									 tr("Account refresh failed"), errorString,
+									 QMessageBox::StandardButton::Ok,
+									 QMessageBox::StandardButton::Ok);
+				emitFailed(errorString);
+				return;
+			}
+			case AccountState::Gone: {
+				auto errorString =
+					tr("The account no longer exists on the servers. It may "
+					   "have been migrated, in which case please add the new "
+					   "account you migrated this one to.");
+				QMessageBox::warning(m_parentWidget, tr("Account gone"),
+									 errorString,
+									 QMessageBox::StandardButton::Ok,
+									 QMessageBox::StandardButton::Ok);
+				emitFailed(errorString);
+				return;
+			}
+		}
+	}
+	emitFailed(tr("Failed to launch."));
+}
+
+void LaunchController::launchInstance()
+{
+	Q_ASSERT_X(m_instance != NULL, "launchInstance", "instance is NULL");
+	Q_ASSERT_X(m_session.get() != nullptr, "launchInstance", "session is NULL");
+
+	if (!m_instance->reloadSettings()) {
+		QMessageBox::critical(m_parentWidget, tr("Error!"),
+							  tr("Couldn't load the instance profile."));
+		emitFailed(tr("Couldn't load the instance profile."));
+		return;
+	}
+
+	m_launcher = m_instance->createLaunchTask(m_session, m_serverToJoin);
+	if (!m_launcher) {
+		emitFailed(tr("Couldn't instantiate a launcher."));
+		return;
+	}
+
+	auto console = qobject_cast<InstanceWindow*>(m_parentWidget);
+	auto showConsole = m_instance->settings()->get("ShowConsole").toBool();
+	if (!console && showConsole) {
+		APPLICATION->showInstanceWindow(m_instance);
+	}
+	connect(m_launcher.get(), &LaunchTask::readyForLaunch, this,
+			&LaunchController::readyForLaunch);
+	connect(m_launcher.get(), &LaunchTask::succeeded, this,
+			&LaunchController::onSucceeded);
+	connect(m_launcher.get(), &LaunchTask::failed, this,
+			&LaunchController::onFailed);
+	connect(m_launcher.get(), &LaunchTask::requestProgress, this,
+			&LaunchController::onProgressRequested);
+
+	// Prepend Online and Auth Status
+	QString online_mode;
+	if (m_session->wants_online) {
+		online_mode = "online";
+
+		// Prepend Server Status
+		QStringList servers = {"session.minecraft.net",
+							   "textures.minecraft.net", "api.mojang.com"};
+		QString resolved_servers = "";
+		QHostInfo host_info;
+
+		for (QString server : servers) {
+			host_info = QHostInfo::fromName(server);
+			resolved_servers =
+				resolved_servers + server + " resolves to:\n    [";
+			if (!host_info.addresses().isEmpty()) {
+				for (QHostAddress address : host_info.addresses()) {
+					resolved_servers = resolved_servers + address.toString();
+					if (!host_info.addresses().endsWith(address)) {
+						resolved_servers = resolved_servers + ", ";
+					}
+				}
+			} else {
+				resolved_servers = resolved_servers + "N/A";
+			}
+			resolved_servers = resolved_servers + "]\n\n";
+		}
+		m_launcher->prependStep(new TextPrint(
+			m_launcher.get(), resolved_servers, MessageLevel::MeshMC));
+	} else {
+		online_mode = "offline";
+	}
+
+	m_launcher->prependStep(new TextPrint(
+		m_launcher.get(), "Launched instance in " + online_mode + " mode\n",
+		MessageLevel::MeshMC));
+
+	// Prepend Version
+	m_launcher->prependStep(new TextPrint(
+		m_launcher.get(),
+		BuildConfig.MESHMC_NAME +
+			" version: " + BuildConfig.printableVersionString() + "\n\n",
+		MessageLevel::MeshMC));
+	m_launcher->start();
+}
+
+void LaunchController::readyForLaunch()
+{
+	if (!m_profiler) {
+		m_launcher->proceed();
+		return;
+	}
+
+	QString error;
+	if (!m_profiler->check(&error)) {
+		m_launcher->abort();
+		QMessageBox::critical(m_parentWidget, tr("Error!"),
+							  tr("Couldn't start profiler: %1").arg(error));
+		emitFailed("Profiler startup failed!");
+		return;
+	}
+	BaseProfiler* profilerInstance =
+		m_profiler->createProfiler(m_launcher->instance(), this);
+
+	connect(profilerInstance, &BaseProfiler::readyToLaunch,
+			[this](const QString& message) {
+				QMessageBox msg;
+				msg.setText(tr("The game launch is delayed until you press the "
+							   "button. This is the right time to setup the "
+							   "profiler, as the "
+							   "profiler server is running now.\n\n%1")
+								.arg(message));
+				msg.setWindowTitle(tr("Waiting."));
+				msg.setIcon(QMessageBox::Information);
+				msg.addButton(tr("Launch"), QMessageBox::AcceptRole);
+				msg.setModal(true);
+				msg.exec();
+				m_launcher->proceed();
+			});
+	connect(profilerInstance, &BaseProfiler::abortLaunch,
+			[this](const QString& message) {
+				QMessageBox msg;
+				msg.setText(tr("Couldn't start the profiler: %1").arg(message));
+				msg.setWindowTitle(tr("Error"));
+				msg.setIcon(QMessageBox::Critical);
+				msg.addButton(QMessageBox::Ok);
+				msg.setModal(true);
+				msg.exec();
+				m_launcher->abort();
+				emitFailed("Profiler startup failed!");
+			});
+	profilerInstance->beginProfiling(m_launcher);
+}
+
+void LaunchController::onSucceeded()
+{
+	emitSucceeded();
+}
+
+void LaunchController::onFailed(QString reason)
+{
+	if (m_instance->settings()->get("ShowConsoleOnError").toBool()) {
+		APPLICATION->showInstanceWindow(m_instance, "console");
+	}
+	emitFailed(reason);
+}
+
+void LaunchController::onProgressRequested(Task* task)
+{
+	ProgressDialog progDialog(m_parentWidget);
+	progDialog.setSkipButton(true, tr("Abort"));
+	m_launcher->proceed();
+	progDialog.execWithTask(task);
+}
+
+bool LaunchController::abort()
+{
+	if (!m_launcher) {
+		return true;
+	}
+	if (!m_launcher->canAbort()) {
+		return false;
+	}
+	auto response = CustomMessageBox::selectable(
+						m_parentWidget, tr("Kill Minecraft?"),
+						tr("This can cause the instance to get corrupted and "
+						   "should only be used if Minecraft "
+						   "is frozen for some reason"),
+						QMessageBox::Question,
+						QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes)
+						->exec();
+	if (response == QMessageBox::Yes) {
+		return m_launcher->abort();
+	}
+	return false;
+}