Simplify adding new domain images. Not there is no separate dict, just searching a file by name from a static finder

boards/models/attachment/viewers.py

@@ -5,7 +5,6 b' from django.contrib.staticfiles.template'
 from django.core.files.images import get_image_dimensions
 from django.template.defaultfilters import filesizeformat
 
-from boards.models.attachment.domains import URL_DOMAINS
 
 REGEX_DOMAIN = re.compile(r'(\w+\.)*(\w+\.\w+)')
 
@@ -60,6 +59,11 b' def get_static_dimensions(filename):'
     return get_image_dimensions(file_path)
 
 
+# TODO Move this to utils
+def file_exists(filename):
+    return finders.find(filename) is not None
+
+
 class AbstractViewer:
     def __init__(self, file, file_type, hash, url):
         self.file = file
@@ -172,14 +176,16 b' class UrlViewer(AbstractViewer):'
 
         if protocol in URL_PROTOCOLS:
             url_image_name = URL_PROTOCOLS.get(protocol)
-        elif domain in URL_DOMAINS:
-            url_image_name = 'domains/' + URL_DOMAINS.get(domain)
         else:
-            url_image_name = FILE_STUB_URL
+            filename = 'images/domains/{}.png'.format(domain)
+            if file_exists(filename):
+                url_image_name = 'domains/' + domain
+            else:
+                url_image_name = FILE_STUB_URL
 
-        image = static('images/' + url_image_name + '.png')
-
-        w, h = get_static_dimensions('images/' + url_image_name + '.png')
+        image_path = 'images/{}.png'.format(url_image_name)
+        image = static(image_path)
+        w, h = get_static_dimensions(image_path)
 
         return '<a href="{}">' \
                '<img class="url-image" src="{}" width="{}" height="{}"/>' \