D120.1732452582.diff
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	diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
	--- a/src/CMakeLists.txt
	+++ b/src/CMakeLists.txt
	@@ -12,6 +12,7 @@
	qt-job.cpp
	${CMAKE_CURRENT_BINARY_DIR}/kazv-version.cpp
	matrix-sdk.cpp
	+ kazv-session-lock-guard.cpp
	matrix-room.cpp
	matrix-room-list.cpp
	matrix-room-timeline.cpp
	diff --git a/src/kazv-session-lock-guard.hpp b/src/kazv-session-lock-guard.hpp
	new file mode 100644
	--- /dev/null
	+++ b/src/kazv-session-lock-guard.hpp
	@@ -0,0 +1,21 @@
	+/*
	+ * This file is part of kazv.
	+ * SPDX-FileCopyrightText: 2024 tusooa <tusooa@kazv.moe>
	+ * SPDX-License-Identifier: AGPL-3.0-or-later
	+ */
	+
	+#pragma once
	+#include <kazv-defs.hpp>
	+#include <memory>
	+#include <filesystem>
	+
	+class KazvSessionLockGuard
	+{
	+public:
	+ KazvSessionLockGuard(const std::filesystem::path &sessionDir);
	+ ~KazvSessionLockGuard();
	+
	+private:
	+ struct Private;
	+ std::unique_ptr<Private> m_d;
	+};
	diff --git a/src/kazv-session-lock-guard.cpp b/src/kazv-session-lock-guard.cpp
	new file mode 100644
	--- /dev/null
	+++ b/src/kazv-session-lock-guard.cpp
	@@ -0,0 +1,64 @@
	+/*
	+ * This file is part of kazv.
	+ * SPDX-FileCopyrightText: 2024 tusooa <tusooa@kazv.moe>
	+ * SPDX-License-Identifier: AGPL-3.0-or-later
	+ */
	+
	+#include <kazv-defs.hpp>
	+#include <kazv-platform.hpp>
	+#include <cstring>
	+#if !KAZV_IS_WINDOWS
	+#include <fcntl.h>
	+#include <unistd.h>
	+#endif
	+#include "kazv-session-lock-guard.hpp"
	+#include "kazv-log.hpp"
	+
	+struct KazvSessionLockGuard::Private
	+{
	+ std::string lockFilePath;
	+ int fd{-1};
	+
	+ void cleanup()
	+ {
	+#if !KAZV_IS_WINDOWS
	+ qCDebug(kazvLog) << "KazvSessionLockGuard::Private::cleanup" << QString::fromStdString(lockFilePath);
	+ if (fd != -1) {
	+ qCDebug(kazvLog) << "unlocking session";
	+ lockf(fd, F_ULOCK, 0);
	+ close(fd);
	+ fd = -1;
	+ }
	+#endif
	+ }
	+
	+ Private(const std::filesystem::path &sessionDir)
	+ : lockFilePath((sessionDir / "lock").string())
	+ {
	+#if !KAZV_IS_WINDOWS
	+ qCDebug(kazvLog) << "KazvSessionLockGuard::Private::Private" << QString::fromStdString(lockFilePath);
	+ fd = open(lockFilePath.data(), O_RDWR \| O_CREAT, S_IRUSR \| S_IWUSR);
	+ if (fd == -1) {
	+ throw std::runtime_error{std::string("Cannot open lock file: ") + std::strerror(errno)};
	+ }
	+
	+ auto res = lockf(fd, F_TLOCK, 0);
	+ if (res == -1) {
	+ cleanup();
	+ throw std::runtime_error{std::string("Cannot grab lock file: ") + std::strerror(errno)};
	+ }
	+#endif
	+ }
	+
	+ ~Private()
	+ {
	+ cleanup();
	+ }
	+};
	+
	+KazvSessionLockGuard::KazvSessionLockGuard(const std::filesystem::path &sessionDir)
	+ : m_d(std::make_unique<Private>(sessionDir))
	+{
	+}
	+
	+KazvSessionLockGuard::~KazvSessionLockGuard() = default;
	diff --git a/src/matrix-sdk.hpp b/src/matrix-sdk.hpp
	--- a/src/matrix-sdk.hpp
	+++ b/src/matrix-sdk.hpp
	@@ -43,6 +43,7 @@
	Q_OBJECT
	QML_ELEMENT

	+ QString m_userDataDir;
	std::unique_ptr<MatrixSdkPrivate> m_d;

	/// @param d A dynamically allocated d-pointer, whose ownership
	@@ -78,7 +79,7 @@

	private:
	// Replaces the store with another one
	- void emplace(std::optional<Kazv::SdkModel> model);
	+ void emplace(std::optional<Kazv::SdkModel> model, std::unique_ptr<KazvSessionLockGuard> lockGuard);

	Q_SIGNALS:
	void trigger(Kazv::KazvEvent e);
	diff --git a/src/matrix-sdk.cpp b/src/matrix-sdk.cpp
	--- a/src/matrix-sdk.cpp
	+++ b/src/matrix-sdk.cpp
	@@ -44,6 +44,7 @@
	#include "matrix-user-given-attrs-map.hpp"
	#include "kazv-log.hpp"
	#include "matrix-utils.hpp"
	+#include "kazv-session-lock-guard.hpp"
	using namespace Kazv;

	// Sdk with qt event loop, identity transform and no enhancers
	@@ -78,10 +79,11 @@

	struct MatrixSdkPrivate
	{
	- MatrixSdkPrivate(MatrixSdk *q, bool testing);
	- MatrixSdkPrivate(MatrixSdk *q, bool testing, SdkModel model);
	+ MatrixSdkPrivate(MatrixSdk *q, bool testing, std::unique_ptr<KazvSessionLockGuard> lockGuard);
	+ MatrixSdkPrivate(MatrixSdk *q, bool testing, SdkModel model, std::unique_ptr<KazvSessionLockGuard> lockGuard);
	bool testing;
	std::string userDataDir;
	+ std::unique_ptr<KazvSessionLockGuard> lockGuard;
	RandomInterface randomGenerator;
	QThread *thread;
	QObject *obj;
	@@ -126,25 +128,25 @@
	explicit CleanupHelper(std::unique_ptr<MatrixSdkPrivate> d)
	: oldD(std::move(d))
	{
	- // After the thread's event loop is finished, we can delete the root object
	- connect(oldD->thread, &QThread::finished, oldD->obj, &QObject::deleteLater);
	- connect(oldD->obj, &QObject::destroyed, this, &QObject::deleteLater);
	}

	- std::shared_ptr<MatrixSdkPrivate> oldD;
	+ std::unique_ptr<MatrixSdkPrivate> oldD;

	void cleanup()
	{
	qCInfo(kazvLog) << "start to clean up everything";
	oldD->clientOnSecondaryRoot.stopSyncing()
	- .then([oldD=oldD](auto &&) {
	+ .then([obj=oldD->obj, thread=oldD->thread](auto &&) {
	qCDebug(kazvLog) << "stopped syncing";
	- QMetaObject::invokeMethod(oldD->obj, [thread=oldD->thread]() {
	+ QMetaObject::invokeMethod(obj, [thread]() {
	thread->quit();
	});
	});
	oldD->thread->wait();
	oldD->thread->deleteLater();
	+ // After the thread's event loop is finished, we can delete the root object
	+ oldD->obj->deleteLater();
	+ this->deleteLater();
	qCInfo(kazvLog) << "thread is done";
	}
	};
	@@ -178,6 +180,15 @@
	return;
	}

	+ if (!lockGuard) {
	+ try {
	+ lockGuard = std::make_unique<KazvSessionLockGuard>(sessionDir);
	+ } catch (const std::runtime_error &e) {
	+ qCWarning(kazvLog) << "Error locking session: " << e.what();
	+ return;
	+ }
	+ }
	+
	{
	auto storeStream = std::ofstream(storeFile);
	if (! storeStream) {
	@@ -199,9 +210,10 @@
	}
	}

	-MatrixSdkPrivate::MatrixSdkPrivate(MatrixSdk *q, bool testing)
	+MatrixSdkPrivate::MatrixSdkPrivate(MatrixSdk *q, bool testing, std::unique_ptr<KazvSessionLockGuard> lockGuard)
	: testing(testing)
	, userDataDir{kazvUserDataDir().toStdString()}
	+ , lockGuard(std::move(lockGuard))
	, randomGenerator(QtRandAdapter{})
	, thread(new QThread())
	, obj(new QObject())
	@@ -222,9 +234,10 @@
	obj->moveToThread(thread);
	}

	-MatrixSdkPrivate::MatrixSdkPrivate(MatrixSdk *q, bool testing, SdkModel model)
	+MatrixSdkPrivate::MatrixSdkPrivate(MatrixSdk *q, bool testing, SdkModel model, std::unique_ptr<KazvSessionLockGuard> lockGuard)
	: testing(testing)
	, userDataDir{kazvUserDataDir().toStdString()}
	+ , lockGuard(std::move(lockGuard))
	, randomGenerator(QtRandAdapter{})
	, thread(new QThread())
	, obj(new QObject())
	@@ -247,6 +260,7 @@

	MatrixSdk::MatrixSdk(std::unique_ptr<MatrixSdkPrivate> d, QObject *parent)
	: QObject(parent)
	+ , m_userDataDir(kazvUserDataDir())
	, m_d(std::move(d))
	{
	init();
	@@ -300,12 +314,12 @@
	}

	MatrixSdk::MatrixSdk(QObject *parent)
	- : MatrixSdk(std::make_unique<MatrixSdkPrivate>(this, /* testing = */ false), parent)
	+ : MatrixSdk(std::make_unique<MatrixSdkPrivate>(this, /* testing = */ false, std::unique_ptr<KazvSessionLockGuard>()), parent)
	{
	}

	MatrixSdk::MatrixSdk(SdkModel model, bool testing, QObject *parent)
	- : MatrixSdk(std::make_unique<MatrixSdkPrivate>(this, testing, std::move(model)), parent)
	+ : MatrixSdk(std::make_unique<MatrixSdkPrivate>(this, testing, std::move(model), std::unique_ptr<KazvSessionLockGuard>()), parent)
	{
	}

	@@ -371,7 +385,7 @@
	return new MatrixRoomList(m_d->clientOnSecondaryRoot);
	}

	-void MatrixSdk::emplace(std::optional<SdkModel> model)
	+void MatrixSdk::emplace(std::optional<SdkModel> model, std::unique_ptr<KazvSessionLockGuard> lockGuard)
	{
	auto testing = m_d->testing;
	auto userDataDir = m_d->userDataDir;
	@@ -381,8 +395,8 @@
	}

	m_d = (model.has_value()
	- ? std::make_unique<MatrixSdkPrivate>(this, testing, std::move(model.value()))
	- : std::make_unique<MatrixSdkPrivate>(this, testing));
	+ ? std::make_unique<MatrixSdkPrivate>(this, testing, std::move(model.value()), std::move(lockGuard))
	+ : std::make_unique<MatrixSdkPrivate>(this, testing, std::move(lockGuard)));
	m_d->userDataDir = userDataDir;

	// Re-initialize lager-qt cursors and watchable connections
	@@ -436,7 +450,8 @@
	bool MatrixSdk::loadSession(QString sessionName)
	{
	using StdPath = std::filesystem::path;
	- auto loadFromSession = [this, sessionName](StdPath sessionDir) {
	+ std::unique_ptr<KazvSessionLockGuard> lockGuard;
	+ auto loadFromSession = [this, sessionName, &lockGuard](StdPath sessionDir) {
	auto storeFile = sessionDir / "store";

	auto metadataFile = sessionDir / "metadata";
	@@ -488,7 +503,7 @@
	qDebug() << "Error when loading session:" << QString::fromStdString(e.what());
	return false;
	}
	- emplace(std::move(model));
	+ emplace(std::move(model), std::move(lockGuard));
	return true;
	};

	@@ -500,6 +515,12 @@
	auto sessionId = parts[1].toStdString();
	auto encodedUserId = encodeBase64(userId, Base64Opts::urlSafe);
	auto sessionDir = userDataDir / "sessions" / encodedUserId / sessionId;
	+ try {
	+ lockGuard = std::make_unique<KazvSessionLockGuard>(sessionDir);
	+ } catch (const std::runtime_error &e) {
	+ qCWarning(kazvLog) << "Error locking session: " << e.what();
	+ return false;
	+ }
	return loadFromSession(sessionDir);
	}
	qDebug(kazvLog) << "no session found for" << sessionName;
	@@ -508,7 +529,7 @@

	bool MatrixSdk::startNewSession()
	{
	- emplace(std::nullopt);
	+ emplace(std::nullopt, std::unique_ptr<KazvSessionLockGuard>());
	return true;
	}

	diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
	--- a/src/tests/CMakeLists.txt
	+++ b/src/tests/CMakeLists.txt
	@@ -9,6 +9,10 @@
	target_include_directories(kazvtestlib PUBLIC ${CMAKE_CURRENT_BINARY_DIR})
	target_link_libraries(kazvtestlib PUBLIC kazvprivlib libkazv::kazvtestfixtures)

	+add_executable(matrix-sdk-session-loader matrix-sdk-session-loader.cpp matrix-sdk-sessions-test.cpp)
	+target_compile_definitions(matrix-sdk-session-loader PRIVATE MATRIX_SDK_SESSIONS_TEST_NO_MAIN)
	+target_link_libraries(matrix-sdk-session-loader Qt${QT_MAJOR_VERSION}::Test kazvtestlib)
	+
	ecm_add_tests(
	qt-job-handler-test.cpp
	qt-promise-handler-test.cpp
	diff --git a/src/tests/matrix-sdk-session-loader.cpp b/src/tests/matrix-sdk-session-loader.cpp
	new file mode 100644
	--- /dev/null
	+++ b/src/tests/matrix-sdk-session-loader.cpp
	@@ -0,0 +1,26 @@
	+/*
	+ * This file is part of kazv.
	+ * SPDX-FileCopyrightText: 2024 tusooa <tusooa@kazv.moe>
	+ * SPDX-License-Identifier: AGPL-3.0-or-later
	+ */
	+
	+#include <kazv-defs.hpp>
	+#include <iostream>
	+#include <QString>
	+#include "matrix-sdk-sessions-test.hpp"
	+
	+int main([[maybe_unused]] int argc, char *argv[])
	+{
	+ std::string userDataDir = argv[1];
	+ std::string sessionName = argv[2];
	+ auto sdk = MatrixSdkSessionsTest::makeMatrixSdkImpl(userDataDir);
	+ auto res = sdk->loadSession(QString::fromStdString(sessionName));
	+ if (!res) {
	+ std::cout << "cannot load session" << std::endl;
	+ return 1;
	+ }
	+
	+ std::cout << "loaded session" << std::endl;
	+ while (1) {}
	+ return 0;
	+}
	diff --git a/src/tests/matrix-sdk-sessions-test.hpp b/src/tests/matrix-sdk-sessions-test.hpp
	new file mode 100644
	--- /dev/null
	+++ b/src/tests/matrix-sdk-sessions-test.hpp
	@@ -0,0 +1,47 @@
	+/*
	+ * This file is part of kazv.
	+ * SPDX-FileCopyrightText: 2024 tusooa <tusooa@kazv.moe>
	+ * SPDX-License-Identifier: AGPL-3.0-or-later
	+ */
	+
	+#pragma once
	+#include <kazv-defs.hpp>
	+#include <memory>
	+#include <QObject>
	+#include <matrix-sdk.hpp>
	+
	+class MatrixSdkSessionsTest : public QObject
	+{
	+ Q_OBJECT
	+
	+private:
	+ std::string m_userDataDir;
	+
	+ void clearDir();
	+ void createSession(std::string userId, std::string deviceId);
	+
	+public:
	+ template<class ...Args>
	+ static std::unique_ptr<MatrixSdk> makeMatrixSdkImpl(std::string userDataDir, Args &&...args)
	+ {
	+ std::unique_ptr<MatrixSdk> sdk(new MatrixSdk(std::forward<Args>(args)...));
	+ sdk->setUserDataDir(userDataDir);
	+ return sdk;
	+ }
	+
	+ template<class ...Args>
	+ std::unique_ptr<MatrixSdk> makeMatrixSdk(Args &&...args)
	+ {
	+ return makeMatrixSdkImpl(m_userDataDir, std::forward<Args>(args)...);
	+ }
	+
	+private Q_SLOTS:
	+ void initTestCase();
	+ void init();
	+ void cleanup();
	+
	+ void testListSessions();
	+ void testListLegacySessions();
	+ void testLoadSession();
	+ void testSessionLock();
	+};
	diff --git a/src/tests/matrix-sdk-sessions-test.cpp b/src/tests/matrix-sdk-sessions-test.cpp
	--- a/src/tests/matrix-sdk-sessions-test.cpp
	+++ b/src/tests/matrix-sdk-sessions-test.cpp
	@@ -5,47 +5,22 @@
	*/

	#include <kazv-defs.hpp>
	+#include <kazv-platform.hpp>
	#include <memory>
	#include <filesystem>
	#include <fstream>
	#include <QObject>
	#include <QtTest>
	+#include <QProcess>
	+#include <QCoreApplication>
	#include <crypto/base64.hpp>
	-#include <matrix-sdk.hpp>
	#include "test-temp.hpp"
	+#include "matrix-sdk-sessions-test.hpp"

	using namespace Kazv;
	namespace Fs = std::filesystem;
	using StdPath = Fs::path;

	-class MatrixSdkSessionsTest : public QObject
	-{
	- Q_OBJECT
	-
	-private:
	- std::string m_userDataDir;
	-
	- void clearDir();
	- void createSession(std::string userId, std::string deviceId);
	-
	- template<class ...Args>
	- std::unique_ptr<MatrixSdk> makeMatrixSdk(Args &&...args)
	- {
	- std::unique_ptr<MatrixSdk> sdk(new MatrixSdk(std::forward<Args>(args)...));
	- sdk->setUserDataDir(m_userDataDir);
	- return sdk;
	- }
	-
	-private Q_SLOTS:
	- void initTestCase();
	- void init();
	- void cleanup();
	-
	- void testListSessions();
	- void testListLegacySessions();
	- void testLoadSession();
	-};
	-
	void MatrixSdkSessionsTest::initTestCase()
	{
	auto dir = StdPath(kazvTestTempDir()) / "sessions-test";
	@@ -70,8 +45,13 @@
	SdkModel model;
	model.client.userId = userId;
	model.client.deviceId = deviceId;
	- auto sdk = makeMatrixSdk(model, /* testing = */ false);
	- sdk->serializeToFile();
	+ {
	+ auto sdk = makeMatrixSdk(model, /* testing = */ false);
	+ sdk->serializeToFile();
	+ }
	+ // Not ideal, but this is the only way to wait for
	+ // MatrixSdkPravite to be destroyed.
	+ QTest::qWait(100);
	}

	void MatrixSdkSessionsTest::testListSessions()
	@@ -117,15 +97,44 @@

	void MatrixSdkSessionsTest::testLoadSession()
	{
	- createSession("@mew:example.com", "device1");
	+ createSession("@mew:example.com", "device4");

	auto sdk = makeMatrixSdk();
	- auto res = sdk->loadSession("@mew:example.com/device1");
	+ auto res = sdk->loadSession("@mew:example.com/device4");
	QVERIFY(res);
	QCOMPARE(sdk->userId(), QStringLiteral("@mew:example.com"));
	- QCOMPARE(sdk->deviceId(), QStringLiteral("device1"));
	+ QCOMPARE(sdk->deviceId(), QStringLiteral("device4"));
	}

	-QTEST_MAIN(MatrixSdkSessionsTest)
	+void MatrixSdkSessionsTest::testSessionLock()
	+{
	+#if KAZV_IS_WINDOWS
	+ QSKIP("Skipping because session lock is not yet supported on Windows");
	+#else
	+ createSession("@mew:example.com", "device5");
	+
	+ auto program = QCoreApplication::applicationDirPath() + QStringLiteral("/matrix-sdk-session-loader");
	+ QProcess proc1;
	+ QStringList args{
	+ QString::fromStdString(m_userDataDir),
	+ QStringLiteral("@mew:example.com/device5"),
	+ };
	+ proc1.start(program, args);
	+ proc1.waitForReadyRead();
	+ auto line = proc1.readLine();
	+ QCOMPARE(line, QByteArray("loaded session\n"));
	+
	+ QProcess proc2;
	+ proc2.start(program, args);
	+ auto res = proc2.waitForFinished();
	+ QVERIFY(res);
	+ QCOMPARE(proc2.exitStatus(), QProcess::NormalExit);
	+ QCOMPARE(proc2.exitCode(), 1);

	-#include "matrix-sdk-sessions-test.moc"
	+ proc1.kill();
	+#endif
	+}
	+
	+#ifndef MATRIX_SDK_SESSIONS_TEST_NO_MAIN
	+QTEST_MAIN(MatrixSdkSessionsTest)
	+#endif

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