Added an image for wikipedia domain. Retrieve only 2nd level domain for the image, ignoring the 3rd level

boards/models/attachment/viewers.py

@@ -1,10 +1,13 b''
 import os
+import re
 
 from django.core.files.images import get_image_dimensions
 from django.template.defaultfilters import filesizeformat
 from django.contrib.staticfiles.templatetags.staticfiles import static
 from django.contrib.staticfiles import finders
 
+REGEX_DOMAIN = re.compile(r'(\w+\.)*(\w+\.\w+)')
+
 FILE_STUB_IMAGE = 'images/file.png'
 FILE_STUB_URL = 'url'
 
@@ -45,8 +48,9 b' URL_PROTOCOLS = {'
 
 URL_DOMAINS = {
     'meduza.io': 'meduza',
-    'www.youtube.com': 'youtube',
+    'youtube.com': 'youtube',
     'youtu.be': 'youtube',
+    'wikipedia.org': 'wikipedia',
 }
 
 CSS_CLASS_IMAGE = 'image'
@@ -169,7 +173,8 b' class UrlViewer(AbstractViewer):'
 
     def get_format_view(self):
         protocol = self.url.split('://')[0]
-        domain = self.url.split('/')[2]
+        full_domain = self.url.split('/')[2]
+        domain = REGEX_DOMAIN.search(full_domain).group(2)
 
         if protocol in URL_PROTOCOLS:
             url_image_name = URL_PROTOCOLS.get(protocol)