Check node sections have content before outputting

views/node.html

@@ -15,6 +15,13 @@
       </section>
     </div>
 
+    {% if
+      node.nickname or
+      node.fingerprint or
+      node.hashed_fingerprint or
+      node.advertised_bandwidth or
+      node.flags.length
+    %}
       <section class="overview">
         <h3>Overview</h3>
         <i class="icon-tor"></i>
@@ -43,9 +50,18 @@
           {% endif %}
         </dl>
       </section>
+    {% endif %}
 
     <div class="columns">
 
+      {% if
+        node.type or
+        node.platform or
+        node.or_addresses.length or
+        node.dir_address or
+        node.transports.length or
+        node.exit_policy.length
+      %}
         <section class="config">
           <h3>Config</h3>
           <dl>
@@ -81,7 +97,18 @@
             {% endif %}
           </dl>
         </section>
+      {% endif %}
 
+      {% if
+        node.host_name or
+        node.contact or
+        node.country_name or
+        node.region_name or
+        node.city_name or
+        node.as_number or
+        node.as_name or
+        node.consensus_weight
+      %}
         <section class="meta">
           <h3>Meta</h3>
           <dl>
@@ -119,6 +146,7 @@
             {% endif %}
           </dl>
         </section>
+      {% endif %}
 
     </div>