fixed concurrency in users & communities, implemented Communities sidebox

ui/views/sb_ftrcomm.jet

@@ -6,20 +6,24 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *}
-<!-- Featured Communities -->
+<!-- Communities sidebox -->
+{{ sb := .GetScratch("__sidebox") }}
 <div class="mb-4">
     <div class="bg-blue-600 px-2 py-1 rounded-t">
-        {{ if .CurrentUser().IsAnon }}
-            <h3 class="text-white font-bold text-base">Featured Communities:</h3>
-        {{ else }}
-            <h3 class="text-white font-bold text-base">Your Communities:</h3>
-        {{ end }}
+        <h3 class="text-white font-bold text-base">{{ sb.Title }}</h3>
     </div>
     <div class="bg-blue-400 px-2 py-2 rounded-b">
         <div class="flex items-center">
-            <span class="mr-2">🟣</span>
-            <a href="http://necrovenice:8080/venice/community/Piazza" 
-                class="text-blue-700 hover:text-blue-900 font-bold text-sm">La Piazza</a>
+            {{ if len(sb.Items) > 0 }}
+                {{ range sb.Items }}
+                    <div class="text-small">
+                        <span class="mr-2">🟣</span>
+                        <a href="{{ .Link }}" class="text-blue-700 hover:text-blue-900 font-bold text-sm">{{ .Text }}</a>
+                    </div>
+                {{ end }}
+            {{ else }}
+                <div class="text-small">You are not a member of any communities.</div>
+            {{ end }}
         </div>
     </div>
 </div>