From cdabaaebd6059077149a4856778ba51bcfd088fd Mon Sep 17 00:00:00 2001
From: Udo Walter
Date: Thu, 14 May 2020 05:35:13 +0200
Subject: Keep track of the number of tunnels per user.

---
 .../de/bwlehrpool/bwlp_guac/TunnelListener.java    | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/main/java/de/bwlehrpool/bwlp_guac/TunnelListener.java b/src/main/java/de/bwlehrpool/bwlp_guac/TunnelListener.java
index 26aa93c..265bfc7 100644
--- a/src/main/java/de/bwlehrpool/bwlp_guac/TunnelListener.java
+++ b/src/main/java/de/bwlehrpool/bwlp_guac/TunnelListener.java
@@ -7,7 +7,7 @@ import org.apache.guacamole.net.event.listener.Listener;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.HashSet;
+import java.util.HashMap;
 
 /**
  * A listener to track whether a user currently is connected to a tunnel.
@@ -16,10 +16,10 @@ public class TunnelListener implements Listener {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(TunnelListener.class);
 
-    private static final HashSet<String> usersWithTunnel = new HashSet<String>();
+    private static final HashMap<String, Integer> userTunnelCount = new HashMap<String, Integer>();
 
     public static boolean hasTunnel(String username) {
-        return usersWithTunnel.contains(username);
+        return userTunnelCount.get(username) != null;
     }
 
     @Override
@@ -27,12 +27,24 @@ public class TunnelListener implements Listener {
         if (event instanceof TunnelConnectEvent) {
             String username = ((TunnelConnectEvent)event).getCredentials().getUsername();
             LOGGER.info("User " + username + " connected to a tunnel.");
-            usersWithTunnel.add(username);
+
+            Integer count = userTunnelCount.get(username);
+            if (count == null) count = 1;
+            else count++;
+            userTunnelCount.put(username, count);
+
+            LOGGER.info("Tunnel count: " + count);
         }
         else if (event instanceof TunnelCloseEvent) {
             String username = ((TunnelCloseEvent)event).getCredentials().getUsername();
             LOGGER.info("User " + username + " closed a tunnel.");
-            usersWithTunnel.remove(username);
+
+            Integer count = userTunnelCount.get(username);
+            if (count != null) {
+                if (count > 1) userTunnelCount.put(username, count - 1);
+                else userTunnelCount.remove(username);
+                LOGGER.info("Tunnel count: " + (count - 1));
+            }
         }
 
     }
-- 
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