Remove cache data when the user logs out

include/Cache.h

@@ -17,6 +17,7 @@
 
 #pragma once
 
+#include <QDir>
 #include <lmdb++.h>
 
 #include "RoomState.h"
@@ -32,6 +33,7 @@ public:
         QString nextBatchToken() const;
         QMap<QString, RoomState> states();
 
+        inline void deleteData();
         inline void unmount();
         inline QString memberDbName(const QString &roomid);
 
@@ -46,6 +48,7 @@ private:
         bool isMounted_;
 
         QString userId_;
+        QString cacheDirectory_;
 };
 
 inline void
@@ -59,3 +62,10 @@ Cache::memberDbName(const QString &roomid)
 {
         return QString("m.%1").arg(roomid);
 }
+
+inline void
+Cache::deleteData()
+{
+        if (!cacheDirectory_.isEmpty())
+                QDir(cacheDirectory_).removeRecursively();
+}

src/Cache.cc

@@ -84,6 +84,9 @@ Cache::Cache(const QString &userId)
         txn.commit();
 
         isMounted_      = true;
+        cacheDirectory_ = QString("%1/%2")
+                            .arg(QStandardPaths::writableLocation(QStandardPaths::CacheLocation))
+                            .arg(QString::fromUtf8(userId_.toUtf8().toHex()));
 }
 
 void

src/ChatPage.cc

@@ -194,6 +194,8 @@ ChatPage::logout()
         settings.remove("");
         settings.endGroup();
 
+        cache_->deleteData();
+
         // Clear the environment.
         room_list_->clear();
         view_manager_->clearAll();