public void relayerMessage(String user, long mesID){

		int index = getMessageIndexFromID(recentMessages, mesID);
		
		if(index != -1 ){
			recentMessages.get(index).addAuthors(user);
		} else {
			int i = 0;
			List<Message> old = null;
			while(index == -1 && i < logs.size()){
				old = loadLog(logs.get(i));
				index = getMessageIndexFromID(old, mesID);
			}
			
			if(i<logs.size() && old != null){
				old.get(index).addAuthors(user);
			} else {
				System.out.println("ERROR : message not found in database");
			}
			
		}
		
		System.out.println("message relayé");
		
	}