feat: add plasma-face-unlock

src/daemon/userstate.cpp

@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "userstate.h"
+
+#include <QDir>
+#include <QFile>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QSaveFile>
+
+namespace
+{
+QString fileFor(const QString &stateDir, uid_t uid)
+{
+    return QDir(stateDir).filePath(QStringLiteral("users/%1.state").arg(uid));
+}
+} // namespace
+
+UserState UserState::load(const QString &stateDir, uid_t uid)
+{
+    UserState s;
+    QFile file(fileFor(stateDir, uid));
+    if (!file.open(QIODevice::ReadOnly)) {
+        return s;
+    }
+    const QJsonObject o = QJsonDocument::fromJson(file.readAll()).object();
+    s.failures = o.value(u"failures").toInt();
+    s.lockedUntil = qint64(o.value(u"lockedUntil").toDouble());
+    s.lastUnlock = qint64(o.value(u"lastUnlock").toDouble());
+    s.lastPurpose = o.value(u"lastPurpose").toString();
+    return s;
+}
+
+bool UserState::save(const QString &stateDir, uid_t uid) const
+{
+    QDir().mkpath(QDir(stateDir).filePath(QStringLiteral("users")));
+    QSaveFile file(fileFor(stateDir, uid));
+    if (!file.open(QIODevice::WriteOnly)) {
+        return false;
+    }
+    file.setPermissions(QFileDevice::ReadOwner | QFileDevice::WriteOwner);
+    const QJsonObject o{
+        {QStringLiteral("failures"), failures},
+        {QStringLiteral("lockedUntil"), double(lockedUntil)},
+        {QStringLiteral("lastUnlock"), double(lastUnlock)},
+        {QStringLiteral("lastPurpose"), lastPurpose},
+    };
+    file.write(QJsonDocument(o).toJson(QJsonDocument::Compact));
+    return file.commit();
+}
+
+qint64 UserState::lockoutLeft(qint64 now) const
+{
+    return lockedUntil > now ? lockedUntil - now : 0;
+}