refactor engine's search language handling

Add match_language function in utils to match any user given
language code with a list of engine's supported languages.

Also add language_aliases dict on each engine to translate
standard language codes into the custom codes used by the engine.

1 files changed, 2 insertions, 7 deletions

diff --git a/searx/engines/wikipedia.py b/searx/engines/wikipedia.py
index fe82f5115..6cd17e378 100644
--- a/searx/engines/wikipedia.py
+++ b/searx/engines/wikipedia.py
@@ -13,6 +13,7 @@
 from json import loads
 from lxml.html import fromstring
 from searx.url_utils import quote, urlencode
+from searx.utils import match_language
 
 # search-url
 base_url = u'https://{language}.wikipedia.org/'
@@ -30,13 +31,7 @@ supported_languages_url = 'https://meta.wikimedia.org/wiki/List_of_Wikipedias'
 
 # set language in base_url
 def url_lang(lang):
-    lang = lang.split('-')[0]
-    if lang not in supported_languages:
-        language = 'en'
-    else:
-        language = lang
-
-    return language
+    return match_language(lang, supported_languages).split('-')[0]
 
 
 # do search-request