first pass at the 0.4 architecture. not ready for use or integration yet, but is functional with some manual build/config work

apps/routerconsole/java/src/net/i2p/router/web/NavHelper.java

@@ -0,0 +1,53 @@
+package net.i2p.router.web;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+import net.i2p.router.RouterContext;
+
+public class NavHelper {
+    private static Map _apps = new HashMap();
+    private RouterContext _context;
+    /**
+     * Configure this bean to query a particular router context
+     *
+     * @param contextId begging few characters of the routerHash, or null to pick
+     *                  the first one we come across.
+     */
+    public void setContextId(String contextId) {
+        try {
+            _context = ContextHelper.getContext(contextId);
+        } catch (Throwable t) {
+            t.printStackTrace();
+        }
+    }
+    
+    public NavHelper() {}
+    
+    /**
+     * To register a new client application so that it shows up on the router
+     * console's nav bar, it should be registered with this singleton. 
+     *
+     * @param name pretty name the app will be called in the link
+     * @param path full path pointing to the application's root 
+     *             (e.g. /i2ptunnel/index.jsp)
+     */
+    public static void registerApp(String name, String path) {
+        _apps.put(name, path);
+    }
+    public static void unregisterApp(String name) {
+        _apps.remove(name);
+    }
+    
+    public String getClientAppLinks() {
+        StringBuffer buf = new StringBuffer(1024); 
+        for (Iterator iter = _apps.keySet().iterator(); iter.hasNext(); ) {
+            String name = (String)iter.next();
+            String path = (String)_apps.get(name);
+            buf.append("<a href=\"").append(path).append("\">");
+            buf.append(name).append("</a> |");
+        }
+        return buf.toString();
+    }
+}