Use global switch to enable/disable preview images

bookwyrm/context_processors.py

@@ -1,18 +1,20 @@
 """ customize the info available in context for rendering templates """
-from bookwyrm import models
-from bookwyrm.settings import STATIC_URL, STATIC_PATH, MEDIA_URL, MEDIA_PATH
+from bookwyrm import models, settings
 
 
 def site_settings(request):  # pylint: disable=unused-argument
     """include the custom info about the site"""
-    request_protocol = "https://" if request.is_secure() else "http://"
+    request_protocol = "https://"
+    if not request.is_secure():
+        request_protocol = "http://"
 
     return {
         "site": models.SiteSettings.objects.get(),
         "active_announcements": models.Announcement.active_announcements(),
-        "static_url": STATIC_URL,
-        "media_url": MEDIA_URL,
-        "static_path": STATIC_PATH,
-        "media_path": MEDIA_PATH,
+        "static_url": settings.STATIC_URL,
+        "media_url": settings.MEDIA_URL,
+        "static_path": settings.STATIC_PATH,
+        "media_path": settings.MEDIA_PATH,
+        "preview_images_enabled": settings.ENABLE_PREVIEW_IMAGES,
         "request_protocol": request_protocol,
     }