feat(MainDb): add const qualifier on some parameters

src/db/main-db.cpp

@@ -1269,8 +1269,8 @@ MainDb::MainDb (const shared_ptr<Core> &core) : AbstractDb(*new MainDbPrivate),
 		return false;
 	}
 
-	bool MainDb::deleteEvent (const shared_ptr<EventLog> &eventLog) {
-		EventLogPrivate *dEventLog = eventLog->getPrivate();
+	bool MainDb::deleteEvent (const shared_ptr<const EventLog> &eventLog) {
+		const EventLogPrivate *dEventLog = eventLog->getPrivate();
 		if (!dEventLog->dbKey.isValid()) {
 			lWarning() << "Unable to delete invalid event.";
 			return false;
@@ -1294,7 +1294,7 @@ MainDb::MainDb (const shared_ptr<Core> &core) : AbstractDb(*new MainDbPrivate),
 		dEventLog->dbKey = MainDbEventKey();
 
 		if (eventLog->getType() == EventLog::Type::ConferenceChatMessage)
-			static_pointer_cast<ConferenceChatMessageEvent>(
+			static_pointer_cast<const ConferenceChatMessageEvent>(
 				eventLog
 			)->getChatMessage()->getPrivate()->dbKey = MainDbChatMessageKey();
 
@@ -2144,7 +2144,7 @@ MainDb::MainDb (const shared_ptr<Core> &core) : AbstractDb(*new MainDbPrivate),
 		return false;
 	}
 
-	bool MainDb::deleteEvent (const shared_ptr<EventLog> &) {
+	bool MainDb::deleteEvent (const shared_ptr<const EventLog> &) {
 		return false;
 	}
 

src/db/main-db.h

@@ -59,7 +59,7 @@ public:
 
 	bool addEvent (const std::shared_ptr<EventLog> &eventLog);
 	bool updateEvent (const std::shared_ptr<EventLog> &eventLog);
-	static bool deleteEvent (const std::shared_ptr<EventLog> &eventLog);
+	static bool deleteEvent (const std::shared_ptr<const EventLog> &eventLog);
 	int getEventsCount (FilterMask mask = NoFilter) const;
 
 	static std::shared_ptr<EventLog> getEventFromKey (const MainDbKey &dbKey);

src/event-log/event-log.cpp

@@ -44,7 +44,7 @@ time_t EventLog::getCreationTime () const {
 	return d->creationTime;
 }
 
-void EventLog::deleteFromDatabase (const shared_ptr<EventLog> &eventLog) {
+void EventLog::deleteFromDatabase (const shared_ptr<const EventLog> &eventLog) {
 	MainDb::deleteEvent(eventLog);
 }
 

src/event-log/event-log.h

@@ -46,7 +46,7 @@ public:
 	Type getType () const;
 	time_t getCreationTime () const;
 
-	static void deleteFromDatabase (const std::shared_ptr<EventLog> &eventLog);
+	static void deleteFromDatabase (const std::shared_ptr<const EventLog> &eventLog);
 
 protected:
 	EventLog (EventLogPrivate &p, Type type, time_t creationTime);