Implement GBFS cache expiry

src/lib/gbfs/gbfsbackend.cpp

@@ -17,17 +17,23 @@
 #include <KPublicTransport/LocationRequest>
 #include <KPublicTransport/RentalVehicle>
 
+#include <QCoreApplication>
 #include <QDebug>
 #include <QJsonArray>
 #include <QJsonDocument>
 #include <QJsonObject>
+#include <QTimer>
 
 #include <cmath>
 #include <functional>
 
 using namespace KPublicTransport;
 
-GBFSBackend::GBFSBackend() = default;
+GBFSBackend::GBFSBackend()
+{
+    QTimer::singleShot(std::chrono::seconds(10), Qt::CoarseTimer, QCoreApplication::instance(), []() { GBFSStore::expire(); });
+}
+
 GBFSBackend::~GBFSBackend() = default;
 
 AbstractBackend::Capabilities GBFSBackend::capabilities() const

src/lib/gbfs/gbfsstore.cpp

@@ -5,10 +5,12 @@
 */
 
 #include "gbfsstore.h"
+#include "logging.h"
 
 #include <QDateTime>
 #include <QDebug>
 #include <QDir>
+#include <QDirIterator>
 #include <QFile>
 #include <QFileInfo>
 #include <QJsonDocument>
@@ -97,9 +99,29 @@ QJsonDocument GBFSStore::loadData(GBFS::FileType type) const
     return QJsonDocument::fromJson(f.readAll());
 }
 
+static void expireRecursive(const QString &path)
+{
+    const auto now = QDateTime::currentDateTime();
+    QDirIterator it(path, QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot | QDir::NoSymLinks);
+    while (it.hasNext()) {
+        it.next();
+
+        if (it.fileInfo().isDir()) {
+            expireRecursive(it.filePath());
+            if (QDir(it.filePath()).isEmpty()) {
+                qCDebug(Log) << "removing empty cache directory" << it.fileName();
+                QDir(path).rmdir(it.filePath());
+            }
+        } else if (it.fileInfo().lastModified() < now) {
+            qCDebug(Log) << "removing expired cache entry" << it.filePath();
+            QDir(path).remove(it.filePath());
+        }
+    }
+}
+
 void GBFSStore::expire()
 {
-    // TODO
+    expireRecursive(QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QLatin1String("/org.kde.kpublictransport/gbfs/feeds/"));
 }
 
 QString GBFSStore::fileName(GBFS::FileType type) const