Display active status of connections.

guacamole/src/main/java/net/sourceforge/guacamole/net/basic/crud/connections/List.java

@@ -154,6 +154,10 @@ public class List extends AuthenticatingHttpServlet {
                         xml.writeAttribute("end",
                             Long.toString(record.getEndDate().getTime()));
 
+                    // Whether connection currently active
+                    if (record.isActive())
+                        xml.writeAttribute("active", "yes");
+
                     // User involved
                     xml.writeCharacters(record.getUsername());
 

guacamole/src/main/webapp/scripts/guac-ui.js

@@ -463,6 +463,14 @@ GuacUI.Connection = function(connection) {
     caption.appendChild(protocol);
     caption.appendChild(name);
 
+    // Add active usages (if any)
+    var active_users = connection.currentUsage();
+    if (active_users > 0) {
+        var usage = GuacUI.createChildElement(caption, "span", "usage");
+        usage.textContent = "Currently in use by " + active_users + " user(s)";
+        GuacUI.addClass(element, "in-use");
+    }
+
     // Assemble connection icon
     element.appendChild(thumbnail);
     element.appendChild(caption);

guacamole/src/main/webapp/scripts/service.js

@@ -31,6 +31,11 @@ var GuacamoleService = GuacamoleService || {};
  */
 GuacamoleService.Connection = function(protocol, id) {
 
+    /**
+     * Reference to this connection.
+     */
+    var guac_connection = this;
+
     /**
      * The protocol associated with this connection.
      */
@@ -52,6 +57,27 @@ GuacamoleService.Connection = function(protocol, id) {
      */
     this.history = [];
 
+    /**
+     * Returns the number of active users of this connection (which may be
+     * multiple instances under the same user) by walking the history records.
+     * 
+     * @return {Number} The number of active users of this connection.
+     */
+    this.currentUsage = function() {
+
+        // Number of users of this connection
+        var usage = 0;
+
+        // Walk history counting active entries
+        for (var i=0; i<guac_connection.history.length; i++) {
+            if (guac_connection.history[i].active)
+                usage++;
+        }
+
+        return usage;
+
+    };
+
 };
 
 /**
@@ -64,8 +90,9 @@ GuacamoleService.Connection = function(protocol, id) {
  *                       milliseconds).
  * @param {Number} end The time that the connection ended (in UNIX epoch
  *                     milliseconds). This parameter is optional.
+ * @param {Boolean} active Whether the connection is currently active.
  */
-GuacamoleService.Connection.Record = function(username, start, end) {
+GuacamoleService.Connection.Record = function(username, start, end, active) {
     
     /**
      * The username of the user associated with this record.
@@ -85,6 +112,11 @@ GuacamoleService.Connection.Record = function(username, start, end) {
      */
     this.end = null;
 
+    /**
+     * Whether this connection is currently active.
+     */
+    this.active = active;
+
     /**
      * The duration of this connection, in seconds. This value is only
      * defined if the end time is available.
@@ -268,7 +300,8 @@ GuacamoleService.Connections = {
                     var record = new GuacamoleService.Connection.Record(
                         recordElement.textContent,
                         parseInt(recordElement.getAttribute("start")),
-                        parseInt(recordElement.getAttribute("end"))
+                        parseInt(recordElement.getAttribute("end")),
+                        recordElement.getAttribute("active") == "yes"
                     );
 
                     // Append to connection history

guacamole/src/main/webapp/styles/login.css

@@ -293,6 +293,12 @@ div#recent-connections div.connection {
     padding: 0.1em;
 }
 
+.connection .usage {
+    float: right;
+    font-style: italic;
+    color: gray;
+}
+
 .connection .thumbnail {
     margin: 0.5em;
 }