wikipedia: Split description retrieval and say() function

sopel/modules/wikipedia.py

@@ -273,6 +273,16 @@ def mw_section(server, query, section):
 
 
 def say_commons_image(bot, trigger, image):
+    desc = mw_commons_image_description(image)
+
+    if desc:
+        bot.say(desc, truncation=" […]")
+
+
+def mw_commons_image_description(image):
+    """
+    Retrieves the Wikimedia Commons description for the given image
+    """
     params = "&".join([
         "action=query",
         "prop=imageinfo",
@@ -293,21 +303,21 @@ def say_commons_image(bot, trigger, image):
         pages = query_data["pages"]
 
         if pageids == [-1] or len(pageids) > 1:
-            bot.say("no lol")
-            return False
+            # We either got no results, or multiple results, time to bail out
+            return None
         else:
             page = pages[pageids[0]]
 
         raw_desc = page["imageinfo"][0]["extmetadata"]["ImageDescription"]["value"]
 
         parser = WikiParser(image)
-        parser.feed(description)
+        parser.feed(raw_desc)
         desc = parser.get_result()
         desc = ' '.join(desc.split())  # collapse multiple whitespace chars
 
-        bot.say(desc, truncation=" […]")
+        return desc
     except LookupError:
-        return False
+        return None
 
 
 # Matches a wikipedia page (excluding spaces and #, but not /File: links), with a separate optional field for the section