fix(ui): ensure finding theme provider doesn't crash thread (#370)

Contents/Code/general_helper.py

@@ -237,11 +237,19 @@ def get_theme_provider(item):
     }
 
     if not item.themes():
+        Log.Debug('No themes found for item: {}'.format(item.title))
         return
 
     provider = None
 
-    selected = (theme for theme in item.themes() if theme.selected).next()
+    selected = None
+    for theme in item.themes():
+        if getattr(theme, 'selected'):
+            selected = theme
+            break
+    if not selected:
+        Log.Debug('No selected theme found for item: {}'.format(item.title))
+        return
 
     if selected.provider in provider_map.keys():
         provider = provider_map[selected.provider]

Contents/Code/webapp.py

@@ -343,6 +343,8 @@ def cache_data():
                 else:
                     theme_status = 'missing'
 
+            theme_provider = general_helper.get_theme_provider(item=item)
+
             items[section.key]['items'].append(dict(
                 title=item.title,
                 agent=item_agent,
@@ -352,7 +354,7 @@ def cache_data():
                 issue_action=issue_action,
                 issue_url=item_issue_url,
                 theme=True if item.theme else False,
-                theme_provider=general_helper.get_theme_provider(item=item),
+                theme_provider=theme_provider,
                 theme_status=theme_status,
                 type=item.type,
                 year=year,