qswiki: Add background worker, currently to clean old sessions mainly

qswiki.cpp

@@ -31,8 +31,8 @@ SOFTWARE.
 #include "handlers/handlerfactory.h"
 #include "database/databasefactory.h"
 #include "config.h"
-#include "template.h"
 #include "session.h"
+#include "template.h"
 #include "logger.h"
 #include "urlprovider.h"
 #include "requestworker.h"
@@ -74,6 +74,33 @@ std::unique_ptr<ICache> createCache(const ConfigVariableResolver &resolver)
 	return std::make_unique<FsCache>(path);
 }
 
+std::thread background_worker;
+void start_background_worker(Database &database, Config &config)
+{
+	background_worker = std::thread(
+		[&database, &config]()
+		{
+			while(true)
+			{
+				Logger::log() << "Executing background worker";
+
+				auto sessionDao = database.createSessionDao();
+				auto sessionList = sessionDao->fetch();
+				time_t now = time(NULL);
+
+				for(Session &sess : sessionList)
+				{
+					if(now - sess.creation_time > config.session_max_lifetime)
+					{
+						sessionDao->deleteSession(sess.token);
+					}
+				}
+
+				std::this_thread::sleep_for(std::chrono::hours(1));
+			}
+		});
+}
+
 int main(int argc, char **argv)
 {
 
@@ -136,6 +163,7 @@ int main(int argc, char **argv)
 		Logger::setStream(&logstream);
 
 		auto database = createDatabase(config);
+
 		std::string socketPath = config.configVarResolver.getConfig("socketpath");
 		CLIHandler cliHandler(config, *database);
 
@@ -158,6 +186,8 @@ int main(int argc, char **argv)
 			exit(EXIT_FAILURE);
 		}
 
+		start_background_worker(*database.get(), config);
+
 		CLIServer cliServer{cliHandler};
 		if(!cliServer.detachServer(socketPath))
 		{